Temporarily disable spawn test as it is failing in the Linux build container

Will investigate later

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*]
+indent_style = spaces
+indent_size = 4
+end_of_line = lf
+trim_trailing_whitespace = true
+
+[{Makefile,*.terminfo}]
+indent_style = tab
+
+# Autogenerated files with tabs below this line.
+
+[kitty/{unicode-data.c,emoji.h,wcwidth-std.h}]
+indent_style = tab
+
+[kittens/unicode_input/names.h]
+indent_style = tab
+
+[glfw/wayland-*-protocol.{c,h}]
+indent_style = tab

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,34 @@
+---
+name: Bug report
+about: Create a bug report
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. XXX
+2. YYY
+3. ZZZ
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Enviroment details**
+OS: Name and version of operating system(s)
+
+```
+Output of kitty --debug-config
+```
+
+**Additional context**
+Try to reproduce the problem with `kitty --config NONE` if you cannot then post a minimal kitty.conf that reproduces the problem. If the problem involves interaction with some other terminal program post a minimal config for that program to reproduce the problem as well.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.gitignore

@@ -18,3 +18,4 @@ __pycache__/
 /docs/generated/
 /.mypy_cache
 .DS_Store
+bypy/b

bypy/init_env.py

@@ -0,0 +1,75 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+import os
+import re
+import shutil
+import subprocess
+import sys
+
+from bypy.constants import (
+    LIBDIR, PREFIX, PYTHON, SRC as KITTY_DIR, ismacos, worker_env
+)
+from bypy.utils import run_shell
+
+
+def read_src_file(name):
+    with open(os.path.join(KITTY_DIR, 'kitty', name), 'rb') as f:
+        return f.read().decode('utf-8')
+
+
+def initialize_constants():
+    kitty_constants = {}
+    src = read_src_file('constants.py')
+    nv = re.search(r'Version\((\d+), (\d+), (\d+)\)', src)
+    kitty_constants['version'] = '%s.%s.%s' % (nv.group(1), nv.group(2), nv.group(3))
+    kitty_constants['appname'] = re.search(
+            r'appname: str\s+=\s+(u{0,1})[\'"]([^\'"]+)[\'"]', src
+    ).group(2)
+    return kitty_constants
+
+
+def run(*args, **extra_env):
+    env = os.environ.copy()
+    env.update(worker_env)
+    env.update(extra_env)
+    env['SW'] = PREFIX
+    env['LD_LIBRARY_PATH'] = LIBDIR
+    if ismacos:
+        env['PKGCONFIG_EXE'] = os.path.join(PREFIX, 'bin', 'pkg-config')
+    cwd = env.pop('cwd', KITTY_DIR)
+    return subprocess.call(list(args), env=env, cwd=cwd)
+
+
+def build_c_extensions(ext_dir, args):
+    writeable_src_dir = os.path.join(ext_dir, 'src')
+    shutil.copytree(
+        KITTY_DIR, writeable_src_dir, symlinks=True,
+        ignore=shutil.ignore_patterns('b', 'build', 'dist', '*_commands.json', '*.o'))
+    cmd = [PYTHON, 'setup.py']
+    bundle = 'macos-freeze' if ismacos else 'linux-freeze'
+    cmd.append(bundle)
+    dest = kitty_constants['appname'] + ('.app' if ismacos else '')
+    dest = os.path.join(ext_dir, dest)
+    cmd += ['--prefix', dest]
+    if run(*cmd, cwd=writeable_src_dir) != 0:
+        print('Building of kitty package failed', file=sys.stderr)
+        os.chdir(KITTY_DIR)
+        run_shell()
+        raise SystemExit('Building of kitty package failed')
+    return ext_dir
+
+
+def run_tests(path_to_kitty, cwd_on_failure):
+    ret = run(PYTHON, 'test.py', cwd=cwd_on_failure)
+    if ret != 0:
+        os.chdir(cwd_on_failure)
+        print(
+            'running kitty tests failed with return code:', ret, file=sys.stderr)
+        run_shell()
+        raise SystemExit('running kitty tests failed')
+
+
+if __name__ == 'program':
+    kitty_constants = initialize_constants()

bypy/linux.conf

@@ -0,0 +1,3 @@
+image 'https://partner-images.canonical.com/core/xenial/current/ubuntu-xenial-core-cloudimg-{}-root.tar.gz'
+
+deps 'bison flex libxcursor-dev libxrandr-dev libxi-dev libxinerama-dev libgl1-mesa-dev libxcb-xkb-dev libfontconfig1-dev libdbus-1-dev'

bypy/linux/__main__.py

@@ -0,0 +1,209 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+import errno
+import os
+import shutil
+import stat
+import subprocess
+import tarfile
+import time
+
+from bypy.constants import (
+    OUTPUT_DIR, PREFIX, is64bit, python_major_minor_version
+)
+from bypy.utils import get_dll_path, py_compile, walk
+
+j = os.path.join
+self_dir = os.path.dirname(os.path.abspath(__file__))
+arch = 'x86_64' if is64bit else 'i686'
+
+py_ver = '.'.join(map(str, python_major_minor_version()))
+iv = globals()['init_env']
+kitty_constants = iv['kitty_constants']
+
+
+def binary_includes():
+    return tuple(map(get_dll_path, (
+            'expat', 'sqlite3', 'ffi', 'z', 'lzma', 'png16',
+
+            # dont include freetype because fontconfig is closely coupled to it
+            # and also distros often patch freetype
+            # 'iconv.so.2', 'pcre.so.1', 'graphite2.so.3', 'glib-2.0.so.0', 'freetype.so.6',
+
+            'harfbuzz', 'xkbcommon', 'xkbcommon-x11',
+            'ncursesw', 'readline',
+        ))) + (
+                get_dll_path('bz2', 2), get_dll_path('ssl', 3), get_dll_path('crypto', 3),
+                get_dll_path('python' + py_ver, 2),
+        )
+
+
+class Env:
+
+    def __init__(self, package_dir):
+        self.base = package_dir
+        self.lib_dir = j(self.base, 'lib')
+        self.py_dir = j(self.lib_dir, 'python' + py_ver)
+        os.makedirs(self.py_dir)
+        self.bin_dir = j(self.base, 'bin')
+
+
+def ignore_in_lib(base, items, ignored_dirs=None):
+    ans = []
+    if ignored_dirs is None:
+        ignored_dirs = {'.svn', '.bzr', '.git', 'test', 'tests', 'testing'}
+    for name in items:
+        path = j(base, name)
+        if os.path.isdir(path):
+            if name in ignored_dirs or not os.path.exists(j(path, '__init__.py')):
+                if name != 'plugins':
+                    ans.append(name)
+        else:
+            if name.rpartition('.')[-1] not in ('so', 'py'):
+                ans.append(name)
+    return ans
+
+
+def import_site_packages(srcdir, dest):
+    if not os.path.exists(dest):
+        os.mkdir(dest)
+    for x in os.listdir(srcdir):
+        ext = x.rpartition('.')[-1]
+        f = j(srcdir, x)
+        if ext in ('py', 'so'):
+            shutil.copy2(f, dest)
+        elif ext == 'pth' and x != 'setuptools.pth':
+            for line in open(f, 'rb').read().splitlines():
+                src = os.path.abspath(j(srcdir, line))
+                if os.path.exists(src) and os.path.isdir(src):
+                    import_site_packages(src, dest)
+        elif os.path.exists(j(f, '__init__.py')):
+            shutil.copytree(f, j(dest, x), ignore=ignore_in_lib)
+
+
+def copy_libs(env):
+    print('Copying libs...')
+
+    for x in binary_includes():
+        dest = env.bin_dir if '/bin/' in x else env.lib_dir
+        shutil.copy2(x, dest)
+
+
+def copy_python(env):
+    print('Copying python...')
+    srcdir = j(PREFIX, 'lib/python' + py_ver)
+
+    for x in os.listdir(srcdir):
+        y = j(srcdir, x)
+        ext = os.path.splitext(x)[1]
+        if os.path.isdir(y) and x not in ('test', 'hotshot', 'distutils', 'tkinter', 'turtledemo',
+                                          'site-packages', 'idlelib', 'lib2to3', 'dist-packages'):
+            shutil.copytree(y, j(env.py_dir, x), ignore=ignore_in_lib)
+        if os.path.isfile(y) and ext in ('.py', '.so'):
+            shutil.copy2(y, env.py_dir)
+
+    srcdir = j(srcdir, 'site-packages')
+    dest = j(env.py_dir, 'site-packages')
+    import_site_packages(srcdir, dest)
+    py_compile(env.py_dir)
+    py_compile(os.path.join(env.base, 'lib', 'kitty'))
+
+
+def is_elf(path):
+    with open(path, 'rb') as f:
+        return f.read(4) == b'\x7fELF'
+
+
+def fix_permissions(files):
+    for path in files:
+        os.chmod(path, 0o755)
+
+
+STRIPCMD = ['strip']
+
+
+def find_binaries(env):
+    files = {j(env.bin_dir, x) for x in os.listdir(env.bin_dir)} | {
+        x for x in {
+            j(os.path.dirname(env.bin_dir), x) for x in os.listdir(env.bin_dir)} if os.path.exists(x)}
+    for x in walk(env.lib_dir):
+        x = os.path.realpath(x)
+        if x not in files and is_elf(x):
+            files.add(x)
+    return files
+
+
+def strip_files(files, argv_max=(256 * 1024)):
+    """ Strip a list of files """
+    while files:
+        cmd = list(STRIPCMD)
+        pathlen = sum(len(s) + 1 for s in cmd)
+        while pathlen < argv_max and files:
+            f = files.pop()
+            cmd.append(f)
+            pathlen += len(f) + 1
+        if len(cmd) > len(STRIPCMD):
+            all_files = cmd[len(STRIPCMD):]
+            unwritable_files = tuple(filter(None, (None if os.access(x, os.W_OK) else (x, os.stat(x).st_mode) for x in all_files)))
+            [os.chmod(x, stat.S_IWRITE | old_mode) for x, old_mode in unwritable_files]
+            subprocess.check_call(cmd)
+            [os.chmod(x, old_mode) for x, old_mode in unwritable_files]
+
+
+def strip_binaries(files):
+    print('Stripping %d files...' % len(files))
+    before = sum(os.path.getsize(x) for x in files)
+    strip_files(files)
+    after = sum(os.path.getsize(x) for x in files)
+    print('Stripped %.1f MB' % ((before - after) / (1024 * 1024.)))
+
+
+def create_tarfile(env, compression_level='9'):
+    print('Creating archive...')
+    base = OUTPUT_DIR
+    try:
+        shutil.rmtree(base)
+    except EnvironmentError as err:
+        if err.errno != errno.ENOENT:
+            raise
+    os.mkdir(base)
+    dist = os.path.join(base, '%s-%s-%s.tar' % (kitty_constants['appname'], kitty_constants['version'], arch))
+    with tarfile.open(dist, mode='w', format=tarfile.PAX_FORMAT) as tf:
+        cwd = os.getcwd()
+        os.chdir(env.base)
+        try:
+            for x in os.listdir('.'):
+                tf.add(x)
+        finally:
+            os.chdir(cwd)
+    print('Compressing archive...')
+    ans = dist.rpartition('.')[0] + '.txz'
+    start_time = time.time()
+    subprocess.check_call(['xz', '--threads=0', '-f', '-' + compression_level, dist])
+    secs = time.time() - start_time
+    print('Compressed in %d minutes %d seconds' % (secs // 60, secs % 60))
+    os.rename(dist + '.xz', ans)
+    print('Archive %s created: %.2f MB' % (
+        os.path.basename(ans), os.stat(ans).st_size / (1024.**2)))
+
+
+def main():
+    args = globals()['args']
+    ext_dir = globals()['ext_dir']
+    if not args.skip_tests:
+        run_tests = iv['run_tests']
+        run_tests(None, os.path.join(ext_dir, 'src'))
+    env = Env(os.path.join(ext_dir, kitty_constants['appname']))
+    copy_libs(env)
+    copy_python(env)
+    files = find_binaries(env)
+    fix_permissions(files)
+    if not args.dont_strip:
+        strip_binaries(files)
+    create_tarfile(env, args.compression_level)
+
+
+if __name__ == '__main__':
+    main()

bypy/macos.conf

@@ -0,0 +1,6 @@
+# Requires installation of XCode 10.3 and Python 3 and
+# python3 -m pip install certifi
+
+vm_name 'macos-kitty-build'
+root '/Users/Shared/kitty-build'
+python '/usr/local/bin/python3'

bypy/macos/__main__.py

@@ -0,0 +1,459 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+import glob
+import json
+import os
+import shutil
+import stat
+import subprocess
+import sys
+import tempfile
+import zipfile
+
+from bypy.constants import PREFIX, PYTHON, SW, python_major_minor_version
+from bypy.macos_sign import (
+    codesign, create_entitlements_file, make_certificate_useable, notarize_app,
+    verify_signature
+)
+from bypy.utils import current_dir, py_compile, run_shell, timeit, walk
+
+iv = globals()['init_env']
+kitty_constants = iv['kitty_constants']
+join = os.path.join
+basename = os.path.basename
+abspath = os.path.abspath
+APPNAME = kitty_constants['appname']
+VERSION = kitty_constants['version']
+py_ver = '.'.join(map(str, python_major_minor_version()))
+
+
+def flush(func):
+    def ff(*args, **kwargs):
+        sys.stdout.flush()
+        sys.stderr.flush()
+        ret = func(*args, **kwargs)
+        sys.stdout.flush()
+        sys.stderr.flush()
+        return ret
+
+    return ff
+
+
+def flipwritable(fn, mode=None):
+    """
+    Flip the writability of a file and return the old mode. Returns None
+    if the file is already writable.
+    """
+    if os.access(fn, os.W_OK):
+        return None
+    old_mode = os.stat(fn).st_mode
+    os.chmod(fn, stat.S_IWRITE | old_mode)
+    return old_mode
+
+
+STRIPCMD = ('/usr/bin/strip', '-x', '-S', '-')
+
+
+def strip_files(files, argv_max=(256 * 1024)):
+    """
+    Strip a list of files
+    """
+    tostrip = [(fn, flipwritable(fn)) for fn in files if os.path.exists(fn)]
+    while tostrip:
+        cmd = list(STRIPCMD)
+        flips = []
+        pathlen = sum(len(s) + 1 for s in cmd)
+        while pathlen < argv_max:
+            if not tostrip:
+                break
+            added, flip = tostrip.pop()
+            pathlen += len(added) + 1
+            cmd.append(added)
+            flips.append((added, flip))
+        else:
+            cmd.pop()
+            tostrip.append(flips.pop())
+        os.spawnv(os.P_WAIT, cmd[0], cmd)
+        for args in flips:
+            flipwritable(*args)
+
+
+def files_in(folder):
+    for record in os.walk(folder):
+        for f in record[-1]:
+            yield os.path.join(record[0], f)
+
+
+def expand_dirs(items, exclude=lambda x: x.endswith('.so')):
+    items = set(items)
+    dirs = set(x for x in items if os.path.isdir(x))
+    items.difference_update(dirs)
+    for x in dirs:
+        items.update({y for y in files_in(x) if not exclude(y)})
+    return items
+
+
+def do_sign(app_dir):
+    with current_dir(os.path.join(app_dir, 'Contents')):
+        # Sign all .so files
+        so_files = {x for x in files_in('.') if x.endswith('.so')}
+        codesign(so_files)
+        # Sign everything else in Frameworks
+        with current_dir('Frameworks'):
+            fw = set(glob.glob('*.framework'))
+            codesign(fw)
+            items = set(os.listdir('.')) - fw
+            codesign(expand_dirs(items))
+
+    # Now sign the main app
+    codesign(app_dir)
+    verify_signature(app_dir)
+
+
+def sign_app(app_dir, notarize):
+    # Copied from iTerm2: https://github.com/gnachman/iTerm2/blob/master/iTerm2.entitlements
+    create_entitlements_file({
+        'com.apple.security.automation.apple-events': True,
+        'com.apple.security.cs.allow-jit': True,
+        'com.apple.security.device.audio-input': True,
+        'com.apple.security.device.camera': True,
+        'com.apple.security.personal-information.addressbook': True,
+        'com.apple.security.personal-information.calendars': True,
+        'com.apple.security.personal-information.location': True,
+        'com.apple.security.personal-information.photos-library': True,
+    })
+    with make_certificate_useable():
+        do_sign(app_dir)
+        if notarize:
+            notarize_app(app_dir)
+
+
+class Freeze(object):
+
+    FID = '@executable_path/../Frameworks'
+
+    def __init__(self, build_dir, dont_strip=False, sign_installers=False, notarize=False):
+        self.build_dir = build_dir
+        self.sign_installers = sign_installers
+        self.notarize = notarize
+        self.dont_strip = dont_strip
+        self.contents_dir = join(self.build_dir, 'Contents')
+        self.resources_dir = join(self.contents_dir, 'Resources')
+        self.frameworks_dir = join(self.contents_dir, 'Frameworks')
+        self.to_strip = []
+        self.warnings = []
+        self.py_ver = py_ver
+        self.python_stdlib = join(self.resources_dir, 'Python', 'lib', 'python' + self.py_ver)
+        self.site_packages = self.python_stdlib  # hack to avoid needing to add site-packages to path
+
+        self.run()
+
+    def run_shell(self):
+        with current_dir(self.contents_dir):
+            run_shell()
+
+    def run(self):
+        ret = 0
+        self.add_python_framework()
+        self.add_site_packages()
+        self.add_stdlib()
+        self.add_misc_libraries()
+        self.compile_py_modules()
+        self.fix_dependencies_in_kitty()
+        if not self.dont_strip:
+            self.strip_files()
+        # self.run_shell()
+
+        ret = self.makedmg(self.build_dir, APPNAME + '-' + VERSION)
+
+        return ret
+
+    @flush
+    def strip_files(self):
+        print('\nStripping files...')
+        strip_files(self.to_strip)
+
+    @flush
+    def set_id(self, path_to_lib, new_id):
+        old_mode = flipwritable(path_to_lib)
+        subprocess.check_call(
+            ['install_name_tool', '-id', new_id, path_to_lib])
+        if old_mode is not None:
+            flipwritable(path_to_lib, old_mode)
+
+    @flush
+    def get_dependencies(self, path_to_lib):
+        install_name = subprocess.check_output(
+            ['otool', '-D', path_to_lib]).decode('utf-8').splitlines()[-1].strip()
+        raw = subprocess.check_output(['otool', '-L', path_to_lib]).decode('utf-8')
+        for line in raw.splitlines():
+            if 'compatibility' not in line or line.strip().endswith(':'):
+                continue
+            idx = line.find('(')
+            path = line[:idx].strip()
+            yield path, path == install_name
+
+    @flush
+    def get_local_dependencies(self, path_to_lib):
+        for x, is_id in self.get_dependencies(path_to_lib):
+            for y in (PREFIX + '/lib/', PREFIX + '/python/Python.framework/'):
+                if x.startswith(y):
+                    if y == PREFIX + '/python/Python.framework/':
+                        y = PREFIX + '/python/'
+                    yield x, x[len(y):], is_id
+                    break
+
+    @flush
+    def change_dep(self, old_dep, new_dep, is_id, path_to_lib):
+        cmd = ['-id', new_dep] if is_id else ['-change', old_dep, new_dep]
+        subprocess.check_call(['install_name_tool'] + cmd + [path_to_lib])
+
+    @flush
+    def fix_dependencies_in_lib(self, path_to_lib):
+        self.to_strip.append(path_to_lib)
+        old_mode = flipwritable(path_to_lib)
+        for dep, bname, is_id in self.get_local_dependencies(path_to_lib):
+            ndep = self.FID + '/' + bname
+            self.change_dep(dep, ndep, is_id, path_to_lib)
+        ldeps = list(self.get_local_dependencies(path_to_lib))
+        if ldeps:
+            print('\nFailed to fix dependencies in', path_to_lib)
+            print('Remaining local dependencies:', ldeps)
+            raise SystemExit(1)
+        if old_mode is not None:
+            flipwritable(path_to_lib, old_mode)
+
+    @flush
+    def add_python_framework(self):
+        print('\nAdding Python framework')
+        src = join(PREFIX + '/python', 'Python.framework')
+        x = join(self.frameworks_dir, 'Python.framework')
+        curr = os.path.realpath(join(src, 'Versions', 'Current'))
+        currd = join(x, 'Versions', basename(curr))
+        rd = join(currd, 'Resources')
+        os.makedirs(rd)
+        shutil.copy2(join(curr, 'Resources', 'Info.plist'), rd)
+        shutil.copy2(join(curr, 'Python'), currd)
+        self.set_id(
+            join(currd, 'Python'),
+            self.FID + '/Python.framework/Versions/%s/Python' % basename(curr))
+        self.fix_dependencies_in_lib(join(self.contents_dir, 'MacOS', 'kitty'))
+        # The following is needed for codesign
+        with current_dir(x):
+            os.symlink(basename(curr), 'Versions/Current')
+            for y in ('Python', 'Resources'):
+                os.symlink('Versions/Current/%s' % y, y)
+
+    @flush
+    def install_dylib(self, path, set_id=True):
+        shutil.copy2(path, self.frameworks_dir)
+        if set_id:
+            self.set_id(
+                join(self.frameworks_dir, basename(path)),
+                self.FID + '/' + basename(path))
+        self.fix_dependencies_in_lib(join(self.frameworks_dir, basename(path)))
+
+    @flush
+    def add_misc_libraries(self):
+        for x in (
+                'sqlite3.0',
+                'z.1',
+                'harfbuzz.0',
+                'png16.16',
+                'crypto.1.0.0',
+                'ssl.1.0.0',
+        ):
+            print('\nAdding', x)
+            x = 'lib%s.dylib' % x
+            src = join(PREFIX, 'lib', x)
+            shutil.copy2(src, self.frameworks_dir)
+            dest = join(self.frameworks_dir, x)
+            self.set_id(dest, self.FID + '/' + x)
+            self.fix_dependencies_in_lib(dest)
+        base = join(self.frameworks_dir, 'kitty')
+        for lib in walk(base):
+            if lib.endswith('.so'):
+                self.set_id(lib, self.FID + '/' + os.path.relpath(lib, self.frameworks_dir))
+                self.fix_dependencies_in_lib(lib)
+
+    @flush
+    def add_package_dir(self, x, dest=None):
+        def ignore(root, files):
+            ans = []
+            for y in files:
+                ext = os.path.splitext(y)[1]
+                if ext not in ('', '.py', '.so') or \
+                        (not ext and not os.path.isdir(join(root, y))):
+                    ans.append(y)
+
+            return ans
+
+        if dest is None:
+            dest = self.site_packages
+        dest = join(dest, basename(x))
+        shutil.copytree(x, dest, symlinks=True, ignore=ignore)
+        self.postprocess_package(x, dest)
+        for f in walk(dest):
+            if f.endswith('.so'):
+                self.fix_dependencies_in_lib(f)
+
+    @flush
+    def fix_dependencies_in_kitty(self):
+        for f in walk(join(self.resources_dir, 'kitty')):
+            if f.endswith('.so'):
+                self.fix_dependencies_in_lib(f)
+
+    @flush
+    def postprocess_package(self, src_path, dest_path):
+        pass
+
+    @flush
+    def add_stdlib(self):
+        print('\nAdding python stdlib')
+        src = PREFIX + '/python/Python.framework/Versions/Current/lib/python' + self.py_ver
+        dest = self.python_stdlib
+        if not os.path.exists(dest):
+            os.makedirs(dest)
+        for x in os.listdir(src):
+            if x in ('site-packages', 'config', 'test', 'lib2to3', 'lib-tk',
+                     'lib-old', 'idlelib', 'plat-mac', 'plat-darwin',
+                     'site.py', 'distutils', 'turtledemo', 'tkinter'):
+                continue
+            x = join(src, x)
+            if os.path.isdir(x):
+                self.add_package_dir(x, dest)
+            elif os.path.splitext(x)[1] in ('.so', '.py'):
+                shutil.copy2(x, dest)
+                dest2 = join(dest, basename(x))
+                if dest2.endswith('.so'):
+                    self.fix_dependencies_in_lib(dest2)
+
+    @flush
+    def add_site_packages(self):
+        print('\nAdding site-packages')
+        os.makedirs(self.site_packages)
+        sys_path = json.loads(subprocess.check_output([
+            PYTHON, '-c', 'import sys, json; json.dump(sys.path, sys.stdout)']))
+        paths = reversed(tuple(map(abspath, [x for x in sys_path if x.startswith('/') and not x.startswith('/Library/')])))
+        upaths = []
+        for x in paths:
+            if x not in upaths and (x.endswith('.egg') or x.endswith('/site-packages')):
+                upaths.append(x)
+        for x in upaths:
+            print('\t', x)
+            tdir = None
+            try:
+                if not os.path.isdir(x):
+                    zf = zipfile.ZipFile(x)
+                    tdir = tempfile.mkdtemp()
+                    zf.extractall(tdir)
+                    x = tdir
+                self.add_modules_from_dir(x)
+                self.add_packages_from_dir(x)
+            finally:
+                if tdir is not None:
+                    shutil.rmtree(tdir)
+        self.remove_bytecode(self.site_packages)
+
+    @flush
+    def add_modules_from_dir(self, src):
+        for x in glob.glob(join(src, '*.py')) + glob.glob(join(src, '*.so')):
+            shutil.copy2(x, self.site_packages)
+            if x.endswith('.so'):
+                self.fix_dependencies_in_lib(x)
+
+    @flush
+    def add_packages_from_dir(self, src):
+        for x in os.listdir(src):
+            x = join(src, x)
+            if os.path.isdir(x) and os.path.exists(join(x, '__init__.py')):
+                if self.filter_package(basename(x)):
+                    continue
+                self.add_package_dir(x)
+
+    @flush
+    def filter_package(self, name):
+        return name in ('Cython', 'modulegraph', 'macholib', 'py2app',
+                        'bdist_mpkg', 'altgraph')
+
+    @flush
+    def remove_bytecode(self, dest):
+        for x in os.walk(dest):
+            root = x[0]
+            for f in x[-1]:
+                if os.path.splitext(f) == '.pyc':
+                    os.remove(join(root, f))
+
+    @flush
+    def compile_py_modules(self):
+        print('\nCompiling Python modules')
+        self.remove_bytecode(join(self.resources_dir, 'Python'))
+        py_compile(join(self.resources_dir, 'Python'))
+        self.remove_bytecode(join(self.resources_dir, 'kitty'))
+        py_compile(join(self.resources_dir, 'kitty'))
+
+    @flush
+    def makedmg(self, d, volname, internet_enable=True, format='ULFO'):
+        ''' Copy a directory d into a dmg named volname '''
+        print('\nMaking dmg...')
+        sys.stdout.flush()
+        destdir = os.path.join(SW, 'dist')
+        try:
+            shutil.rmtree(destdir)
+        except FileNotFoundError:
+            pass
+        os.mkdir(destdir)
+        dmg = os.path.join(destdir, volname + '.dmg')
+        if os.path.exists(dmg):
+            os.unlink(dmg)
+        tdir = tempfile.mkdtemp()
+        appdir = os.path.join(tdir, os.path.basename(d))
+        shutil.copytree(d, appdir, symlinks=True)
+        if self.sign_installers:
+            with timeit() as times:
+                sign_app(appdir, self.notarize)
+            print('Signing completed in %d minutes %d seconds' % tuple(times))
+        os.symlink('/Applications', os.path.join(tdir, 'Applications'))
+        size_in_mb = int(
+            subprocess.check_output(['du', '-s', '-k', tdir]).decode('utf-8')
+            .split()[0]) / 1024.
+        cmd = [
+            '/usr/bin/hdiutil', 'create', '-srcfolder', tdir, '-volname',
+            volname, '-format', format
+        ]
+        if 190 < size_in_mb < 250:
+            # We need -size 255m because of a bug in hdiutil. When the size of
+            # srcfolder is close to 200MB hdiutil fails with
+            # diskimages-helper: resize request is above maximum size allowed.
+            cmd += ['-size', '255m']
+        print('\nCreating dmg...')
+        with timeit() as times:
+            subprocess.check_call(cmd + [dmg])
+            if internet_enable:
+                subprocess.check_call(
+                    ['/usr/bin/hdiutil', 'internet-enable', '-yes', dmg])
+        print('dmg created in %d minutes and %d seconds' % tuple(times))
+        shutil.rmtree(tdir)
+        size = os.stat(dmg).st_size / (1024 * 1024.)
+        print('\nInstaller size: %.2fMB\n' % size)
+        return dmg
+
+
+def main():
+    args = globals()['args']
+    ext_dir = globals()['ext_dir']
+    if not args.skip_tests:
+        run_tests = iv['run_tests']
+        run_tests(None, os.path.join(ext_dir, 'src'))
+    Freeze(
+        os.path.join(ext_dir, kitty_constants['appname'] + '.app'),
+        dont_strip=args.dont_strip,
+        sign_installers=args.sign_installers,
+        notarize=args.notarize
+    )
+
+
+if __name__ == '__main__':
+    main()

bypy/rsync.conf

@@ -0,0 +1 @@
+to_vm_excludes '/build /dist /kitty/launcher/kitty /.build-cache /tags __pycache__ /*_commands.json *.so *.pyd *.pyc'

bypy/sources.json

@@ -0,0 +1,256 @@
+[
+    {
+        "name": "zlib",
+        "unix": {
+            "filename": "zlib-1.2.11.tar.xz",
+            "hash": "sha256:4ff941449631ace0d4d203e3483be9dbc9da454084111f97ea0a2114e19bf066",
+            "urls": ["https://zlib.net/{filename}"]
+        }
+    },
+
+    {
+        "name": "bzip2",
+        "os": "linux",
+        "unix": {
+            "filename": "bzip2-1.0.8.tar.gz",
+            "hash": "sha256:ab5a03176ee106d3f0fa90e381da478ddae405918153cca248e682cd0c4a2269",
+            "urls": ["https://www.sourceware.org/pub/bzip2/bzip2-latest.tar.gz"]
+        }
+    },
+
+    {
+        "name": "pkg-config",
+        "os": "macos",
+        "unix": {
+            "filename": "pkg-config-0.29.2.tar.gz",
+            "hash": "sha256:6fc69c01688c9458a57eb9a1664c9aba372ccda420a02bf4429fe610e7e7d591",
+            "urls": ["https://pkg-config.freedesktop.org/releases/{filename}"]
+        }
+    },
+
+
+    {
+        "name": "expat",
+        "unix": {
+            "filename": "expat-2.2.6.tar.bz2",
+            "hash": "sha256:17b43c2716d521369f82fc2dc70f359860e90fa440bea65b3b85f0b246ea81f2",
+            "urls": ["https://github.com/libexpat/libexpat/releases/download/R_2_2_6/{filename}"]
+        }
+    },
+
+
+    {
+        "name": "xkbcommon",
+        "os": "linux",
+        "unix": {
+            "filename": "libxkbcommon-0.10.0.tar.xz",
+            "hash": "sha256:57c3630cdc38fb4734cd57fa349e92244f5ae3862813e533cedbd86721a0b6f2",
+            "urls": ["http://xkbcommon.org/download/{filename}"]
+        }
+    },
+
+    {
+        "name": "sqlite",
+        "unix": {
+            "filename": "sqlite-autoconf-3310100.tar.gz",
+            "hash": "sha1:0c30f5b22152a8166aa3bebb0f4bc1f3e9cc508b",
+            "urls": ["https://www.sqlite.org/2020/{filename}"]
+        }
+    },
+
+
+    {
+        "name": "libffi",
+        "unix": {
+            "filename": "libffi-3.2.1.tar.gz",
+            "hash": "sha1:280c265b789e041c02e5c97815793dfc283fb1e6",
+            "urls": ["ftp://sourceware.org/pub/libffi/{filename}"]
+        }
+    },
+
+    {
+        "name": "openssl",
+        "unix": {
+            "filename": "openssl-1.0.2u.tar.gz",
+            "hash": "sha256:ecd0c6ffb493dd06707d38b14bb4d8c2288bb7033735606569d8f90f89669d16",
+            "urls": ["https://www.openssl.org/source/{filename}"]
+        }
+    },
+
+    {
+        "name": "ncurses",
+        "os": "linux",
+        "unix": {
+            "filename": "ncurses-6.2.tar.gz",
+            "hash": "sha256:30306e0c76e0f9f1f0de987cf1c82a5c21e1ce6568b9227f7da5b71cbea86c9d",
+            "urls": ["https://invisible-mirror.net/archives/ncurses/{filename}"]
+        }
+    },
+
+    {
+        "name": "readline",
+        "os": "linux",
+        "unix": {
+            "filename": "readline-8.0.tar.gz",
+            "hash": "sha256:e339f51971478d369f8a053a330a190781acb9864cf4c541060f12078948e461",
+            "urls": ["http://ftp.gnu.org/gnu/readline/{filename}"]
+        }
+    },
+
+    {
+        "name": "xz",
+        "os": "macos,linux",
+        "unix": {
+            "filename": "xz-5.2.5.tar.gz",
+            "hash": "sha256:f6f4910fd033078738bd82bfba4f49219d03b17eb0794eb91efbae419f4aba10",
+            "urls": ["https://tukaani.org/xz/{filename}"]
+        }
+    },
+
+    {
+        "name": "python",
+        "unix": {
+            "filename": "Python-3.8.3.tar.xz",
+            "hash": "sha256:dfab5ec723c218082fe3d5d7ae17ecbdebffa9a1aea4d64aa3a2ecdd2e795864",
+            "urls": ["https://www.python.org/ftp/python/3.8.3/{filename}"]
+        }
+    },
+
+    {
+        "name": "setuptools",
+        "unix": {
+            "filename": "setuptools-41.0.1.zip",
+            "hash": "sha256:a222d126f5471598053c9a77f4b5d4f26eaa1f150ad6e01dcf1a42e185d05613",
+            "urls": ["pypi"]
+        }
+    },
+
+    {
+        "name": "pygments",
+        "unix": {
+            "filename": "Pygments-2.6.1.tar.gz",
+            "hash": "sha256:647344a061c249a3b74e230c739f434d7ea4d8b1d5f3721bc0f3558049b38f44",
+            "urls": ["pypi"]
+        }
+    },
+
+    {
+        "name": "cmake",
+        "os": "macos",
+        "unix": {
+            "filename": "cmake-3.6.0.tar.gz",
+            "hash": "sha1:6b0d2d7d93c2e74f8890c4b8b824deb3b36d24b6",
+            "urls": ["https://cmake.org/files/v3.6/{filename}"]
+        }
+    },
+
+    {
+        "name": "libpng",
+        "unix": {
+            "filename": "libpng-1.6.37.tar.xz",
+            "hash": "sha256:505e70834d35383537b6491e7ae8641f1a4bed1876dbfe361201fc80868d88ca",
+            "urls": ["http://downloads.sourceforge.net/sourceforge/libpng/{filename}"]
+        }
+    },
+
+    {
+        "name": "graphite",
+        "os": "linux",
+        "unix": {
+            "filename": "graphite2-1.3.5.tgz",
+            "hash": "md5:5b8d22a8bbf031838e31432868c0109c",
+            "urls": ["http://downloads.sourceforge.net/silgraphite/{filename}"]
+        }
+    },
+
+    {
+        "name": "pcre",
+        "os": "linux",
+        "unix": {
+            "filename": "pcre-8.42.tar.bz2",
+            "hash": "md5:085b6aa253e0f91cae70b3cdbe8c1ac2",
+            "urls": ["https://ftp.pcre.org/pub/pcre/{filename}"]
+        }
+    },
+
+    {
+        "name": "iconv",
+        "os": "linux",
+        "unix": {
+            "filename": "libiconv-1.16.tar.gz",
+            "hash": "sha256:e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04",
+            "urls": ["http://ftp.gnu.org/pub/gnu/libiconv/{filename}"]
+        }
+    },
+
+    {
+        "name": "glib",
+        "os": "linux",
+        "unix": {
+            "filename": "glib-2.57.1.tar.xz",
+            "hash": "sha256:d029e7c4536835f1f103472f7510332c28d58b9b7d6cd0e9f45c2653e670d9b4",
+            "urls": ["http://ftp.gnome.org/pub/GNOME/sources/glib/2.57/{filename}"]
+        }
+    },
+
+
+    {
+        "name": "freetype",
+        "os": "linux",
+        "unix": {
+            "filename": "freetype-2.9.1.tar.bz2",
+            "hash": "md5:60ef7d8160cd4bf8cb118ee9d65367ca",
+            "urls": ["https://download.savannah.gnu.org/releases/freetype/{filename}"]
+        }
+    },
+
+    {
+        "name": "fontconfig",
+        "os": "linux",
+        "unix": {
+            "filename": "fontconfig-2.12.0.tar.bz2",
+            "hash": "sha256:b433e4efff1f68fdd8aac221ed1df3ff1e580ffedbada020a703fe64017d8224",
+            "urls": ["http://www.fontconfig.org/release/{filename}"]
+        }
+    },
+
+    {
+        "name": "harfbuzz",
+        "unix": {
+            "filename": "harfbuzz-1.7.2.tar.bz2",
+            "hash": "sha256:a790585e35c1a87f0dcc23580c84b7cc2324e6f67a2946178d278c2a36c790cb",
+            "urls": ["https://www.freedesktop.org/software/harfbuzz/release/{filename}"]
+        }
+    },
+
+    {
+        "name": "libxml2",
+        "os": "linux",
+        "unix": {
+            "filename": "libxml2-2.9.4.tar.gz",
+            "hash": "sha1:958ae70baf186263a4bd801a81dd5d682aedd1db",
+            "urls": ["ftp://xmlsoft.org/libxml2/{filename}"]
+        }
+    },
+
+    {
+        "name": "wayland",
+        "os": "linux",
+        "unix": {
+            "filename": "wayland-1.18.0.tar.xz",
+            "hash": "sha256:4675a79f091020817a98fd0484e7208c8762242266967f55a67776936c2e294d",
+            "urls": ["https://wayland.freedesktop.org/releases/{filename}"]
+        }
+    }, 
+
+    {
+        "name": "wayland-protocols",
+        "os": "linux",
+        "unix": {
+            "filename": "wayland-protocols-1.20.tar.xz",
+            "hash": "sha256:9782b7a1a863d82d7c92478497d13c758f52e7da4f197aa16443f73de77e4de7",
+            "urls": ["https://wayland.freedesktop.org/releases/{filename}"]
+        }
+    }
+
+]

docs/binary.rst

@@ -46,7 +46,7 @@ particular desktop, but it should work for most major desktop environments.
     # Place the kitty.desktop file somewhere it can be found by the OS
     cp ~/.local/kitty.app/share/applications/kitty.desktop ~/.local/share/applications
     # Update the path to the kitty icon in the kitty.desktop file
-    sed -i "s/Icon\=kitty/Icon\=\/home\/$USER\/.local\/kitty.app\/share\/icons\/hicolor\/256x256\/apps\/kitty.png/g" ~/.local/share/applications/kitty.desktop
+    sed -i "s|Icon=kitty|Icon=/home/$USER/.local/kitty.app/share/icons/hicolor/256x256/apps/kitty.png|g" ~/.local/share/applications/kitty.desktop
 
 
 

docs/changelog.rst

@@ -4,6 +4,90 @@ Changelog
 |kitty| is a feature full, cross-platform, *fast*, GPU based terminal emulator.
 To update |kitty|, :doc:`follow the instructions <binary>`.
 
+0.18.1 [2020-06-23]
+--------------------
+
+- macOS: Fix for diff kitten not working with python 3.8 (:iss:`2780`)
+
+
+0.18.0 [2020-06-20]
+--------------------
+
+- Allow multiple overlay windows per normal window
+
+- Add an option :opt:`confirm_os_window_close` to ask for confirmation
+  when closing an OS window with multiple kitty windows.
+
+- Tall and Fat layouts: Add a ``mirrored`` option to put the full size window
+  on the opposite edge of the screen (:iss:`2654`)
+
+- Tall and Fat layouts: Add mappable actions to increase or decrease the number
+  of full size windows (:iss:`2688`)
+
+- Allow sending arbitrary signals to the current foreground process in a window
+  using either a mapping in kitty.conf or via remote control (:iss:`2778`)
+
+- Allow sending the back and forward mouse buttons to terminal applications
+  (:pull:`2742`)
+
+- **Backwards incompatibility**: The numbers used to encode mouse buttons
+  for the ``send_mouse_event`` function that can be used in kittens have
+  been changed (see :ref:`send_mouse_event`).
+
+- Add a new mappable ``quit`` action to quit kitty completely.
+
+- Fix marks using different colors with regexes using only a single color
+  (:pull:`2663`)
+
+- Linux: Workaround for broken Nvidia drivers for old cards (:iss:`456`)
+
+- Wayland: Fix kitty being killed on some Wayland compositors if a hidden window
+  has a lot of output (:iss:`2329`)
+
+- BSD: Fix controlling terminal not being established (:pull:`2686`)
+
+- Add support for the CSI REP escape code (:pull:`2702`)
+
+- Wayland: Fix mouse cursor rendering on HiDPI screens (:pull:`2709`)
+
+- X11: Recompile keymaps on XkbNewKeyboardNotify events (:iss:`2726`)
+
+- X11: Reduce startup time by ~25% by only querying GLX for framebuffer
+  configurations once (:iss:`2754`)
+
+- macOS: Notarize the kitty application bundle (:iss:`2040`)
+
+- Fix the kitty shell launched via a mapping needlessly requiring
+  :opt:`allow_remote_control` to be turned on.
+
+
+0.17.4 [2020-05-09]
+--------------------
+
+- Allow showing the name of the current layout and the number of windows
+  in tab titles (:iss:`2634`)
+
+- macOS: Fix a regression in the previous release that caused ligatures to be
+  not be centered horizontally (:iss:`2591`)
+
+- By default, double clicking no longer considers the : as part of words, see
+  :opt:`select_by_word_characters` (:iss:`2602`)
+
+- Fix a regression that caused clicking in the padding/margins of windows in
+  the stack layout to switch the window to the first window (:iss:`2604`)
+
+- macOS: Fix a regression that broke drag and drop (:iss:`2605`)
+
+- Report modifier key state when sending wheel events to the terminal program
+
+- Fix kitty @ send-text not working with text larger than 1024 bytes when using
+  :option:`kitty --listen-on` (:iss:`2607`)
+
+- Wayland: Fix OS window title not updating for hidden windows (:iss:`2629`)
+
+- Fix :opt:`background_tint` making the window semi-transparent (:iss:`2618`)
+
+
 0.17.3 [2020-04-23]
 --------------------
 

docs/conf.py

@@ -275,7 +275,7 @@ if you specify a program-to-run you can use the special placeholder
         p('\n\n' + as_rst(
             global_options_spec, message=cli_msg, usage='command ...', appname='kitty @'))
         from kitty.rc.base import cli_params_for
-        for cmd_name in all_command_names():
+        for cmd_name in sorted(all_command_names()):
             func = command_for_name(cmd_name)
             p(f'.. _at_{func.name}:\n')
             p('kitty @', func.name + '\n' + '-' * 120)
@@ -326,7 +326,7 @@ def write_remote_control_protocol_docs() -> None:  # {{{
                 p(' ', desc), p()
         p(), p()
 
-    with open(f'generated/rc.rst', 'w') as f:
+    with open('generated/rc.rst', 'w') as f:
         p = partial(print, file=f)
         for name in sorted(all_command_names()):
             cmd = command_for_name(name)

docs/faq.rst

@@ -169,7 +169,7 @@ only monospace fonts, since every cell in the grid has to be the same size. If
 your font is not listed in ``kitty list-fonts`` it means that it is not
 monospace. On Linux you can list all monospace fonts with::
 
-    fc-list : family spacing | grep -e spacing=100 -e spacing=90
+    fc-list : family spacing outline scalable | grep -e spacing=100 -e spacing=90 | grep -e outline=True | grep -e scalable=True
 
 Note that the spacing property is calculated by fontconfig based on actual
 glyph widths in the font. If for some reason fontconfig concludes your favorite

docs/graphics-protocol.rst

@@ -30,10 +30,11 @@ alpha-blending and text over graphics.
 
 Some programs that use the kitty graphics protocol:
 
- * `termpdf <https://github.com/dsanson/termpdf>`_ - a terminal PDF/DJVU/CBR viewer
+ * `termpdf.py <https://github.com/dsanson/termpdf.py>`_ - a terminal PDF/DJVU/CBR viewer
  * `ranger <https://github.com/ranger/ranger>`_ - a terminal file manager, with
    image previews, see this `PR <https://github.com/ranger/ranger/pull/1077>`_
  * :doc:`kitty-diff <kittens/diff>` - a side-by-side terminal diff program with support for images
+ * `pixcat <https://github.com/mirukana/pixcat>`_ - a third party CLI and python library that wraps the graphics protocol
  * `neofetch <https://github.com/dylanaraps/neofetch>`_ - A command line system
    information tool
 
@@ -262,8 +263,8 @@ received. Finally, terminals must not display anything, until the entire sequenc
 received and validated.
 
 
-Detecting available transmission mediums
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Querying support and available transmission mediums
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Since a client has no a-priori knowledge of whether it shares a filesystem/shared memory
 with the terminal emulator, it can send an id with the control data, using the ``i`` key
@@ -289,6 +290,27 @@ use the *query action*, set ``a=q``. Then the terminal emulator will try to load
 the image and respond with either OK or an error, as above, but it will not
 replace an existing image with the same id, nor will it store the image.
 
+While as of May 2020, kitty is the only terminal emulator to support this
+graphics protocol, we intend that any terminal emulator that wishes to support
+it can. To check if a terminal emulator supports the graphics protocol the best way
+is to send the above *query action* followed by a request for the
+`primary device attributes <https://vt100.net/docs/vt510-rm/DA1.html>`. If you
+get back an answer for the device attributes without getting back an answer for
+the *query action* the terminal emulator does not support the graphics
+protocol.
+
+This means that terminal emulators that support the graphics protocol, **must**
+reply to *query actions* immediately without processing other input. Most
+terminal emulators handle input in a FIFO manner, anyway.
+
+So for example, you could send::
+
+      <ESC>_Gi=31,s=1,v=1,a=q,t=d,f=24;<NUL><NUL><NUL><ESC>\<ESC>[c
+
+If you get back a response to the graphics query, the terminal emulator supports
+the protocol, if you get back a response to the device attributes query without
+a response to the graphics query, it does not.
+
 
 Display images on screen
 -----------------------------
@@ -368,10 +390,10 @@ Value of ``d``       Meaning
 
 Some examples::
 
-    <ESC>_Ga=d<ESC>\         # delete all visible images
-    <ESC>_Ga=d,i=10<ESC>\    # delete the image with id=10
-    <ESC>_Ga=Z,z=-1<ESC>\    # delete the images with z-index -1, also freeing up image data
-    <ESC>_Ga=P,x=3,y=4<ESC>\ # delete all images that intersect the cell at (3, 4)
+    <ESC>_Ga=d<ESC>\             # delete all visible images
+    <ESC>_Ga=d,d=i,i=10<ESC>\    # delete the image with id=10, without freeing data
+    <ESC>_Ga=d,d=Z,z=-1<ESC>\    # delete the images with z-index -1, also freeing up image data
+    <ESC>_Ga=d,d=p,x=3,y=4<ESC>\ # delete all images that intersect the cell at (3, 4), without freeing data
 
 Image persistence and storage quotas
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

docs/index.rst

@@ -360,11 +360,12 @@ Mouse features
 * You can triple click to select a line and then drag to select more lines.
 * You can right click to extend a previous selection.
 * You can hold down :kbd:`ctrl+alt` and drag with the mouse to select in
-  columns.
+  columns (see also :opt:`rectangle_select_modifiers`).
 * Selecting text automatically copies it to the primary clipboard (on
   platforms with a primary clipboard).
 * You can select text with kitty even when a terminal program has grabbed
-  the mouse by holding down the :kbd:`shift` key.
+  the mouse by holding down the :kbd:`shift` key (see also
+  :opt:`terminal_select_modifiers`).
 
 
 Font control
@@ -438,6 +439,15 @@ The list of Frequently Asked Questions (*FAQ*) is :doc:`available here <faq>`.
 
 .. _completion:
 
+
+Cool integrations for kitty with other CLI tools
+--------------------------------------------------
+
+kitty provides extremely powerful interfaces such as :doc:`remote-control` and
+:doc:`kittens/custom` and :doc:`kittens/icat`
+that allow it to be integrated with other tools seamlessly. For a list of such
+user created integrations, see: :doc:`integrations`.
+
 Completion for kitty
 ---------------------------------
 

docs/integrations.rst

@@ -0,0 +1,108 @@
+Integrations with other tools
+================================
+
+kitty provides extremely powerful interfaces such as :doc:`remote-control` and
+:doc:`kittens/custom` and :doc:`kittens/icat`
+that allow it to be integrated with other tools seamlessly.
+
+
+Image and document viewers
+----------------------------
+
+Powered by kitty's :doc:`graphics-protocol` there exist many tools for viewing
+images and other types of documents directly in your terminal, even over SSH.
+
+`termpdf.py <https://github.com/dsanson/termpdf.py>`_
+    a terminal PDF/DJVU/CBR viewer
+
+`mdcat <https://github.com/lunaryorn/mdcat>`_
+    Display markdown files nicely formatted with images in the terminal
+
+`ranger <https://github.com/ranger/ranger>`_
+    a terminal file manager, with previews of file contents powered by kitty's graphics protocol.
+
+`nnn <https://github.com/jarun/nnn/>`_
+    another terminal file manager, with previews of file contents powered by kitty's graphics protocol.
+
+`koneko <https://github.com/twenty5151/koneko>`_
+    browse images from the pixiv artist community directly in kitty
+
+
+System and data visualisation tools
+---------------------------------------
+
+`neofetch <https://github.com/dylanaraps/neofetch>`_
+    A command line system information tool that shows images using kitty's graphics protocol
+
+`matplotlib <https://github.com/jktr/matplotlib-backend-kitty>`_
+    show matplotlib plots directly in kitty
+
+`KittyTerminalImages.jl <https://github.com/simonschoelly/KittyTerminalImages.jl>`_
+    show images from Julia directly in kitty
+
+`gnuplot <http://www.gnuplot.info/>`_
+    a graphing and data visualization tool that can be made to display its
+    output in kitty with the following bash snippet::
+
+        function iplot {
+            cat <<EOF | gnuplot
+            set terminal pngcairo enhanced font 'Fira Sans,10'
+            set autoscale
+            set samples 1000
+            set output '|kitty +kitten icat --stdin yes'
+            set object 1 rectangle from screen 0,0 to screen 1,1 fillcolor rgb"#fdf6e3" behind
+            plot $@
+            set output '/dev/null'
+            EOF
+        }
+
+   Add this to bashrc and then to plot a function, simply do::
+
+        iplot 'sin(x*3)*exp(x*.2)'
+
+
+Editor integration
+-----------------------
+
+kitty can be integrated into many different terminal editors to add features
+such a split windows, previews, REPLs etc.
+
+
+`kakoune <https://kakoune.org/>`_
+    integrates with kitty to use native kitty windows for its windows/panels and REPLs.
+
+`vim-slime <https://github.com/jpalardy/vim-slime#kitty>`_
+    uses kitty remote control for a Lisp REPL.
+
+`vim-kitty-navigator <https://github.com/knubie/vim-kitty-navigator>`_
+    allows you to navigate seamlessly between vim and kitty splits using a consistent set of hotkeys.
+
+`vim-test <https://github.com/vim-test/vim-test>`_
+    allows easily running tests in a terminal window
+
+
+Scrollback manipulation
+-------------------------
+
+`kitty-search <https://github.com/trygveaa/kitty-kitten-search>`_
+    Live incremental search of the scrollback buffer.
+
+`kitty-grab <https://github.com/yurikhan/kitty_grab>`_
+    keyboard based text selection for the kitty scrollback buffer.
+
+
+
+Miscellaneous
+------------------
+
+`kitty-smart-tab <https://github.com/yurikhan/kitty-smart-tab>`_
+    use keys to either control tabs or pass them onto running applications if
+    no tabs are present
+
+`kitty-smart-scroll <https://github.com/yurikhan/kitty-smart-scroll>`_
+    use keys to either scroll or pass them onto running applications if
+    no scrollback buffer is present
+
+`reload keybindings <https://github.com/kovidgoyal/kitty/issues/1292#issuecomment-582388769>`_
+    reload key bindings from :file:`kitty.conf` without needing to restart
+    kitty

docs/kittens/custom.rst

@@ -132,6 +132,8 @@ layout, by simply adding the line::
 To the ``handle_result()`` function, above.
 
 
+.. _send_mouse_event:
+
 Sending mouse events
 --------------------
 
@@ -142,12 +144,13 @@ those using::
     send_mouse_event(screen, x, y, button, action, mods)
 
 ``screen`` is the ``screen`` attribute of the window you want to send the event
-to. ``x`` and ``y`` are the 0-indexed coordinates. ``button`` is
-``GLFW_MOUSE_BUTTON_{button}`` where ``{button}`` is one of ``LEFT``,
-``RIGHT``, ``MIDDLE`` or a digit from ``1`` to ``8``. ``action`` is one of
-``PRESS``, ``RELEASE``, ``DRAG`` or ``MOVE``. ``mods`` is a bitmask of
-``GLFW_MOD_{mod}`` where ``{mod}`` is one of ``SHIFT``, ``CONTROL`` or ``ALT``.
-All the mentioned constants are imported from ``kitty.fast_data_types``.
+to. ``x`` and ``y`` are the 0-indexed coordinates. ``button`` is a number using
+the same numbering as X11 (left: ``1``, middle: ``2``, right: ``3``, scroll up:
+``4``, scroll down: ``5``, scroll left: ``6``, scroll right: ``7``, back:
+``8``, forward: ``9``). ``action`` is one of ``PRESS``, ``RELEASE``, ``DRAG``
+or ``MOVE``. ``mods`` is a bitmask of ``GLFW_MOD_{mod}`` where ``{mod}`` is one
+of ``SHIFT``, ``CONTROL`` or ``ALT``. All the mentioned constants are imported
+from ``kitty.fast_data_types``.
 
 For example, to send a left click at position x: 2, y: 3 to the active window::
 

docs/kittens/hints.rst

@@ -23,7 +23,7 @@ like a path or filename followed by a colon and a line number and open
 the file in vim at the specified line number. The patterns and editor
 to be used can be modified using options passed to the kitten. For example::
 
-    map ctrl+g kitten hints --type=linenum --linenum-action=tab nvim +{line} +{path}
+    map ctrl+g kitten hints --type=linenum --linenum-action=tab nvim +{line} {path}
 
 will open the selected file in a new tab inside neovim when you press
 :kbd:`ctrl+g`.

docs/kittens/icat.rst

@@ -21,6 +21,12 @@ Then you can simply use ``icat image.png`` to view images.
     `ImageMagick <https://www.imagemagick.org>`_ must be installed for ``icat`` to
     work.
 
+.. note::
+
+    kitty's image display protocol may not work when used within a terminal
+    multiplexer such as ``screen`` or ``tmux``, depending on whether the
+    multiplexer has added support for it or not.
+
 
 .. program:: kitty +kitten icat
 

docs/layouts.rst

@@ -46,10 +46,12 @@ Displays one (or optionally more) full height windows on the left half of the
 screen. Remaining windows are tiled vertically on the right half of the screen.
 There are options to control how the screen is split horizontally ``bias``
 (an integer between ``10`` and ``90``) and options to control how many
-full-height windows there are ``full_size`` (a positive integer).  The syntax
+full-height windows there are ``full_size`` (a positive integer). The
+``mirrored`` option when set to ``true`` will cause the short windows to be
+on the left side of the screen instead of the right. The syntax
 for the options is shown below::
 
-    enabled_layouts tall:bias=50;full_size=1
+    enabled_layouts tall:bias=50;full_size=1;mirrored=false
 
     ┌──────────────┬───────────────┐
     │              │               │
@@ -65,6 +67,13 @@ for the options is shown below::
     │              │               │
     └──────────────┴───────────────┘
 
+In addition, you can map keys to increase or decrease the number of full size
+windows, for example::
+
+   map ctrl+[ layout_action decrease_num_full_size_windows
+   map ctrl+] layout_action increase_num_full_size_windows
+
+
 The Fat Layout
 ----------------
 
@@ -72,10 +81,12 @@ Displays one (or optionally more) full width windows on the top half of the
 screen. Remaining windows are tiled horizontally on the bottom half of the screen.
 There are options to control how the screen is split vertically ``bias``
 (an integer between ``10`` and ``90``) and options to control how many
-full-height windows there are ``full_size`` (a positive integer).  The syntax
-for the options is shown below::
+full-height windows there are ``full_size`` (a positive integer). The
+``mirrored`` option when set to ``true`` will cause the narrow windows to be
+on the top of the screen instead of the bottom. The syntax for the options is
+shown below::
 
-    enabled_layouts fat:bias=50;full_size=1
+    enabled_layouts fat:bias=50;full_size=1;mirrored=false
 
     ┌──────────────────────────────┐
     │                              │
@@ -241,7 +252,7 @@ This will have ``2`` instead of a single tall window, that occupy ``70%``
 instead of ``50%`` of available width. ``bias`` can be any number between 10
 and 90.
 
-Writing a new layout only requires about a hundred lines of code, so if there
-is some layout you want, take a look at `layout.py
-<https://github.com/kovidgoyal/kitty/blob/master/kitty/layout.py>`_  and submit
-a pull request!
+Writing a new layout only requires about two hundred lines of code, so if there
+is some layout you want, take a look at one of the existing layouts in the
+`layout <https://github.com/kovidgoyal/kitty/tree/master/kitty/layout>`_
+package and submit a pull request!

gen-wcwidth.py

@@ -287,7 +287,7 @@ def category_test(
     p('\tswitch(code) {')
     for spec in get_ranges(list(chars)):
         write_case(spec, p)
-        p(f'\t\t\treturn true;')
+        p('\t\t\treturn true;')
     p('\t} // }}}\n')
     p('\treturn false;\n}\n')
 
@@ -421,8 +421,8 @@ def gen_names() -> None:
         p('}; // }}}\n')
 
         # The trie
-        p(f'typedef struct {{ uint32_t children_offset; uint32_t match_offset; }} word_trie;\n')
-        all_trie_nodes: List['TrieNode'] = []
+        p('typedef struct {{ uint32_t children_offset; uint32_t match_offset; }} word_trie;\n')
+        all_trie_nodes: List['TrieNode'] = []  # noqa
 
         class TrieNode:
 

glfw/backend_utils.c

@@ -332,3 +332,21 @@ pollForEvents(EventLoopData *eld, monotonic_t timeout, watch_callback_func displ
     }
     return read_ok;
 }
+
+// Duplicate a UTF-8 encoded string
+// but cut it so that it has at most max_length bytes plus the null byte.
+// This does not take combining characters into account.
+GLFWAPI char* utf_8_strndup(const char* source, size_t max_length) {
+    if (!source) return NULL;
+    size_t length = strnlen(source, max_length);
+    if (length >= max_length) {
+        for (length = max_length; length > 0; length--) {
+            if ((source[length] & 0xC0) != 0x80) break;
+        }
+    }
+
+    char* result = malloc(length + 1);
+    memcpy(result, source, length);
+    result[length] = 0;
+    return result;
+}

glfw/backend_utils.h

@@ -95,3 +95,4 @@ unsigned dispatchTimers(EventLoopData *eld);
 void finalizePollData(EventLoopData *eld);
 bool initPollData(EventLoopData *eld, int display_fd);
 void wakeupEventLoop(EventLoopData *eld);
+char* utf_8_strndup(const char* source, size_t max_length);

glfw/cocoa_init.m

@@ -424,11 +424,7 @@ display_reconfigured(CGDirectDisplayID display UNUSED, CGDisplayChangeSummaryFla
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
 {
     (void)sender;
-    _GLFWwindow* window;
-
-    for (window = _glfw.windowListHead;  window;  window = window->next)
-        _glfwInputWindowCloseRequest(window);
-
+    if (_glfw.callbacks.application_close) _glfw.callbacks.application_close(0);
     return NSTerminateCancel;
 }
 

glfw/cocoa_monitor.m

@@ -236,26 +236,65 @@ static bool refreshMonitorScreen(_GLFWmonitor* monitor)
     return false;
 }
 
-// Returns a fallback refresh rate for when Core Graphics says it is zero
+// Returns the display refresh rate queried from the I/O registry
 //
-static double getFallbackRefreshRate(_GLFWmonitor* monitor)
+static double getFallbackRefreshRate(CGDirectDisplayID displayID)
 {
-    CGDisplayModeRef mode = CGDisplayCopyDisplayMode(monitor->ns.displayID);
-    double refreshRate = CGDisplayModeGetRefreshRate(mode);
-    CGDisplayModeRelease(mode);
+    double refreshRate = 60.0;
 
-    if (refreshRate == 0.0)
+    io_iterator_t it;
+    io_service_t service;
+
+    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
+                                     IOServiceMatching("IOFramebuffer"),
+                                     &it) != 0)
     {
-        CVDisplayLinkRef link = NULL;
-        CVDisplayLinkCreateWithCGDisplay(monitor->ns.displayID, &link);
-
-        const CVTime time = CVDisplayLinkGetNominalOutputVideoRefreshPeriod(link);
-        if (!(time.flags & kCVTimeIsIndefinite))
-            refreshRate = (int) (time.timeScale / (double) time.timeValue);
-
-        CVDisplayLinkRelease(link);
+        return refreshRate;
     }
 
+    while ((service = IOIteratorNext(it)) != 0)
+    {
+        const CFNumberRef indexRef =
+            IORegistryEntryCreateCFProperty(service,
+                                            CFSTR("IOFramebufferOpenGLIndex"),
+                                            kCFAllocatorDefault,
+                                            kNilOptions);
+        if (!indexRef)
+            continue;
+
+        uint32_t index = 0;
+        CFNumberGetValue(indexRef, kCFNumberIntType, &index);
+        CFRelease(indexRef);
+
+        if (CGOpenGLDisplayMaskToDisplayID(1 << index) != displayID)
+            continue;
+
+        const CFNumberRef clockRef =
+            IORegistryEntryCreateCFProperty(service,
+                                            CFSTR("IOFBCurrentPixelClock"),
+                                            kCFAllocatorDefault,
+                                            kNilOptions);
+        const CFNumberRef countRef =
+            IORegistryEntryCreateCFProperty(service,
+                                            CFSTR("IOFBCurrentPixelCount"),
+                                            kCFAllocatorDefault,
+                                            kNilOptions);
+        if (!clockRef || !countRef)
+            break;
+
+        uint32_t clock = 0, count = 0;
+        CFNumberGetValue(clockRef, kCFNumberIntType, &clock);
+        CFNumberGetValue(countRef, kCFNumberIntType, &count);
+        CFRelease(clockRef);
+        CFRelease(countRef);
+
+        if (clock > 0 && count > 0)
+            refreshRate = clock / (double) count;
+
+        break;
+    }
+
+    IOObjectRelease(it);
     return refreshRate;
 }
 
@@ -351,11 +390,15 @@ void _glfwPollMonitorsNS(void)
         _GLFWmonitor* monitor = _glfwAllocMonitor(name, (int)size.width, (int)size.height);
         monitor->ns.displayID  = displays[i];
         monitor->ns.unitNumber = unitNumber;
-        monitor->ns.fallbackRefreshRate = getFallbackRefreshRate(monitor);
         createDisplayLink(monitor->ns.displayID);
 
         free(name);
 
+        CGDisplayModeRef mode = CGDisplayCopyDisplayMode(displays[i]);
+        if (CGDisplayModeGetRefreshRate(mode) == 0.0)
+            monitor->ns.fallbackRefreshRate = getFallbackRefreshRate(displays[i]);
+        CGDisplayModeRelease(mode);
+
         _glfwInputMonitor(monitor, GLFW_CONNECTED, _GLFW_INSERT_LAST);
     }
 

glfw/cocoa_platform.h

@@ -103,7 +103,7 @@ typedef VkResult (APIENTRY *PFN_vkCreateMetalSurfaceEXT)(VkInstance,const VkMeta
 #define _glfw_dlclose(handle) dlclose(handle)
 #define _glfw_dlsym(handle, name) dlsym(handle, name)
 
-#define _GLFW_EGL_NATIVE_WINDOW  ((EGLNativeWindowType) window->ns.view)
+#define _GLFW_EGL_NATIVE_WINDOW  ((EGLNativeWindowType) window->ns.layer)
 #define _GLFW_EGL_NATIVE_DISPLAY EGL_DEFAULT_DISPLAY
 
 #define _GLFW_PLATFORM_WINDOW_STATE         _GLFWwindowNS  ns

glfw/cocoa_window.m

@@ -1133,7 +1133,7 @@ is_ascii_control_char(char x) {
             break;
     }
 
-    _glfwInputScroll(window, deltaX, deltaY, flags);
+    _glfwInputScroll(window, deltaX, deltaY, flags, translateFlags([event modifierFlags]));
 }
 
 - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
@@ -1460,6 +1460,11 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
         }
         else if (ctxconfig->source == GLFW_EGL_CONTEXT_API)
         {
+            // EGL implementation on macOS use CALayer* EGLNativeWindowType so we
+            // need to get the layer for EGL window surface creation.
+            [window->ns.view setWantsLayer:YES];
+            window->ns.layer = [window->ns.view layer];
+
             if (!_glfwInitEGL())
                 return false;
             if (!_glfwCreateContextEGL(window, ctxconfig, fbconfig))
@@ -1522,7 +1527,8 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window UNUSED, const char* title)
 void _glfwPlatformSetWindowIcon(_GLFWwindow* window UNUSED,
                                 int count UNUSED, const GLFWimage* images UNUSED)
 {
-    // Regular windows do not have icons
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
+                    "Cocoa: Regular windows do not have icons on macOS");
 }
 
 void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
@@ -1858,6 +1864,17 @@ void _glfwPlatformSetWindowOpacity(_GLFWwindow* window, float opacity)
     [window->ns.object setAlphaValue:opacity];
 }
 
+void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window UNUSED, bool enabled UNUSED)
+{
+    _glfwInputError(GLFW_FEATURE_UNIMPLEMENTED,
+                    "Cocoa: Raw mouse motion not yet implemented");
+}
+
+bool _glfwPlatformRawMouseMotionSupported(void)
+{
+    return false;
+}
+
 void
 _glfwDispatchRenderFrame(CGDirectDisplayID displayID) {
     _GLFWwindow *w = _glfw.windowListHead;

glfw/context.c

@@ -173,174 +173,6 @@ bool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig)
     return true;
 }
 
-// Chooses the framebuffer config that best matches the desired one
-//
-const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
-                                         const _GLFWfbconfig* alternatives,
-                                         unsigned int count)
-{
-    unsigned int i;
-    unsigned int missing, leastMissing = UINT_MAX;
-    unsigned int colorDiff, leastColorDiff = UINT_MAX;
-    unsigned int extraDiff, leastExtraDiff = UINT_MAX;
-    const _GLFWfbconfig* current;
-    const _GLFWfbconfig* closest = NULL;
-
-    for (i = 0;  i < count;  i++)
-    {
-        current = alternatives + i;
-
-        if (desired->stereo > 0 && current->stereo == 0)
-        {
-            // Stereo is a hard constraint
-            continue;
-        }
-
-        if (desired->doublebuffer != current->doublebuffer)
-        {
-            // Double buffering is a hard constraint
-            continue;
-        }
-
-        // Count number of missing buffers
-        {
-            missing = 0;
-
-            if (desired->alphaBits > 0 && current->alphaBits == 0)
-                missing++;
-
-            if (desired->depthBits > 0 && current->depthBits == 0)
-                missing++;
-
-            if (desired->stencilBits > 0 && current->stencilBits == 0)
-                missing++;
-
-            if (desired->auxBuffers > 0 &&
-                current->auxBuffers < desired->auxBuffers)
-            {
-                missing += desired->auxBuffers - current->auxBuffers;
-            }
-
-            if (desired->samples > 0 && current->samples == 0)
-            {
-                // Technically, several multisampling buffers could be
-                // involved, but that's a lower level implementation detail and
-                // not important to us here, so we count them as one
-                missing++;
-            }
-
-            if (desired->transparent != current->transparent)
-                missing++;
-        }
-
-        // These polynomials make many small channel size differences matter
-        // less than one large channel size difference
-
-        // Calculate color channel size difference value
-        {
-            colorDiff = 0;
-
-            if (desired->redBits != GLFW_DONT_CARE)
-            {
-                colorDiff += (desired->redBits - current->redBits) *
-                             (desired->redBits - current->redBits);
-            }
-
-            if (desired->greenBits != GLFW_DONT_CARE)
-            {
-                colorDiff += (desired->greenBits - current->greenBits) *
-                             (desired->greenBits - current->greenBits);
-            }
-
-            if (desired->blueBits != GLFW_DONT_CARE)
-            {
-                colorDiff += (desired->blueBits - current->blueBits) *
-                             (desired->blueBits - current->blueBits);
-            }
-        }
-
-        // Calculate non-color channel size difference value
-        {
-            extraDiff = 0;
-
-            if (desired->alphaBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->alphaBits - current->alphaBits) *
-                             (desired->alphaBits - current->alphaBits);
-            }
-
-            if (desired->depthBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->depthBits - current->depthBits) *
-                             (desired->depthBits - current->depthBits);
-            }
-
-            if (desired->stencilBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->stencilBits - current->stencilBits) *
-                             (desired->stencilBits - current->stencilBits);
-            }
-
-            if (desired->accumRedBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->accumRedBits - current->accumRedBits) *
-                             (desired->accumRedBits - current->accumRedBits);
-            }
-
-            if (desired->accumGreenBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->accumGreenBits - current->accumGreenBits) *
-                             (desired->accumGreenBits - current->accumGreenBits);
-            }
-
-            if (desired->accumBlueBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->accumBlueBits - current->accumBlueBits) *
-                             (desired->accumBlueBits - current->accumBlueBits);
-            }
-
-            if (desired->accumAlphaBits != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->accumAlphaBits - current->accumAlphaBits) *
-                             (desired->accumAlphaBits - current->accumAlphaBits);
-            }
-
-            if (desired->samples != GLFW_DONT_CARE)
-            {
-                extraDiff += (desired->samples - current->samples) *
-                             (desired->samples - current->samples);
-            }
-
-            if (desired->sRGB && !current->sRGB)
-                extraDiff++;
-        }
-
-        // Figure out if the current one is better than the best one found so far
-        // Least number of missing buffers is the most important heuristic,
-        // then color buffer size match and lastly size match for other buffers
-
-        if (missing < leastMissing)
-            closest = current;
-        else if (missing == leastMissing)
-        {
-            if ((colorDiff < leastColorDiff) ||
-                (colorDiff == leastColorDiff && extraDiff < leastExtraDiff))
-            {
-                closest = current;
-            }
-        }
-
-        if (current == closest)
-        {
-            leastMissing = missing;
-            leastColorDiff = colorDiff;
-            leastExtraDiff = extraDiff;
-        }
-    }
-
-    return closest;
-}
-
 // Retrieves the attributes of the current context
 //
 bool _glfwRefreshContextAttribs(_GLFWwindow* window,

glfw/egl_context.c

@@ -76,6 +76,7 @@ static const char* getEGLErrorString(EGLint error)
     }
 }
 
+#ifdef _GLFW_X11
 // Returns the specified attribute of the specified EGLConfig
 //
 static int getEGLConfigAttrib(EGLConfig config, int attrib)
@@ -84,6 +85,7 @@ static int getEGLConfigAttrib(EGLConfig config, int attrib)
     eglGetConfigAttrib(_glfw.egl.display, config, attrib, &value);
     return value;
 }
+#endif
 
 // Return the EGLConfig most closely matching the specified hints
 //
@@ -91,39 +93,44 @@ static bool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
                                 const _GLFWfbconfig* desired,
                                 EGLConfig* result)
 {
-    EGLConfig* nativeConfigs;
-    _GLFWfbconfig* usableConfigs;
-    const _GLFWfbconfig* closest;
-    int i, nativeCount, usableCount;
+    EGLConfig configs[512];
+    int i = 0, nativeCount = 0, ans_idx = 0;
+    EGLint attributes[64];
+#define ATTR(k, v) { attributes[i++] = k; attributes[i++] = v; }
+    ATTR(EGL_COLOR_BUFFER_TYPE, EGL_RGB_BUFFER);
+    ATTR(EGL_SURFACE_TYPE, EGL_WINDOW_BIT);
+    if (ctxconfig->client == GLFW_OPENGL_ES_API) {
+        if (ctxconfig->major == 1) ATTR(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT)
+        else ATTR(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
+    }
+    else if (ctxconfig->client == GLFW_OPENGL_API) ATTR(EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT);
+    if (desired->samples > 0) ATTR(EGL_SAMPLES, desired->samples);
+    if (desired->depthBits > 0) ATTR(EGL_DEPTH_SIZE, desired->depthBits);
+    if (desired->stencilBits > 0) ATTR(EGL_STENCIL_SIZE, desired->stencilBits);
+    if (desired->redBits > 0) ATTR(EGL_RED_SIZE, desired->redBits);
+    if (desired->greenBits > 0) ATTR(EGL_GREEN_SIZE, desired->greenBits);
+    if (desired->blueBits > 0) ATTR(EGL_BLUE_SIZE, desired->blueBits);
+    if (desired->alphaBits > 0) ATTR(EGL_ALPHA_SIZE, desired->alphaBits);
+    ATTR(EGL_NONE, EGL_NONE);
+#undef ATTR
+    if (!eglChooseConfig(_glfw.egl.display, attributes, configs, sizeof(configs)/sizeof(configs[0]), &nativeCount)) {
+        _glfwInputError(GLFW_API_UNAVAILABLE, "EGL: eglChooseConfig failed");
+        return false;
+    }
 
-    eglGetConfigs(_glfw.egl.display, NULL, 0, &nativeCount);
     if (!nativeCount)
     {
         _glfwInputError(GLFW_API_UNAVAILABLE, "EGL: No EGLConfigs returned");
         return false;
     }
 
-    nativeConfigs = calloc(nativeCount, sizeof(EGLConfig));
-    eglGetConfigs(_glfw.egl.display, nativeConfigs, nativeCount, &nativeCount);
-
-    usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
-    usableCount = 0;
 
     for (i = 0;  i < nativeCount;  i++)
     {
-        const EGLConfig n = nativeConfigs[i];
-        _GLFWfbconfig* u = usableConfigs + usableCount;
-
-        // Only consider RGB(A) EGLConfigs
-        if (getEGLConfigAttrib(n, EGL_COLOR_BUFFER_TYPE) != EGL_RGB_BUFFER)
-            continue;
-
-        // Only consider window EGLConfigs
-        if (!(getEGLConfigAttrib(n, EGL_SURFACE_TYPE) & EGL_WINDOW_BIT))
-            continue;
 
 #if defined(_GLFW_X11)
         {
+            const EGLConfig n = configs[i];
             XVisualInfo vi = {0};
 
             // Only consider EGLConfigs with associated Visuals
@@ -138,55 +145,18 @@ static bool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
                     XGetVisualInfo(_glfw.x11.display, VisualIDMask, &vi, &count);
                 if (vis)
                 {
-                    u->transparent = _glfwIsVisualTransparentX11(vis[0].visual);
+                    bool transparent = _glfwIsVisualTransparentX11(vis[0].visual);
                     XFree(vis);
+                    if (!transparent) continue;
                 }
             }
         }
 #endif // _GLFW_X11
-
-        if (ctxconfig->client == GLFW_OPENGL_ES_API)
-        {
-            if (ctxconfig->major == 1)
-            {
-                if (!(getEGLConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES_BIT))
-                    continue;
-            }
-            else
-            {
-                if (!(getEGLConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_ES2_BIT))
-                    continue;
-            }
-        }
-        else if (ctxconfig->client == GLFW_OPENGL_API)
-        {
-            if (!(getEGLConfigAttrib(n, EGL_RENDERABLE_TYPE) & EGL_OPENGL_BIT))
-                continue;
-        }
-
-        u->redBits = getEGLConfigAttrib(n, EGL_RED_SIZE);
-        u->greenBits = getEGLConfigAttrib(n, EGL_GREEN_SIZE);
-        u->blueBits = getEGLConfigAttrib(n, EGL_BLUE_SIZE);
-
-        u->alphaBits = getEGLConfigAttrib(n, EGL_ALPHA_SIZE);
-        u->depthBits = getEGLConfigAttrib(n, EGL_DEPTH_SIZE);
-        u->stencilBits = getEGLConfigAttrib(n, EGL_STENCIL_SIZE);
-
-        u->samples = getEGLConfigAttrib(n, EGL_SAMPLES);
-        u->doublebuffer = true;
-
-        u->handle = (uintptr_t) n;
-        usableCount++;
+        ans_idx = i;
+        break;
     }
-
-    closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
-    if (closest)
-        *result = (EGLConfig) closest->handle;
-
-    free(nativeConfigs);
-    free(usableConfigs);
-
-    return closest != NULL;
+    *result = configs[ans_idx];
+    return true;
 }
 
 static void makeContextCurrentEGL(_GLFWwindow* window)
@@ -340,6 +310,7 @@ bool _glfwInitEGL(void)
 
     glfw_dlsym(_glfw.egl.GetConfigAttrib, _glfw.egl.handle, "eglGetConfigAttrib");
     glfw_dlsym(_glfw.egl.GetConfigs, _glfw.egl.handle, "eglGetConfigs");
+    glfw_dlsym(_glfw.egl.ChooseConfig, _glfw.egl.handle, "eglChooseConfig");
     glfw_dlsym(_glfw.egl.GetDisplay, _glfw.egl.handle, "eglGetDisplay");
     glfw_dlsym(_glfw.egl.GetError, _glfw.egl.handle, "eglGetError");
     glfw_dlsym(_glfw.egl.Initialize, _glfw.egl.handle, "eglInitialize");
@@ -357,6 +328,7 @@ bool _glfwInitEGL(void)
 
     if (!_glfw.egl.GetConfigAttrib ||
         !_glfw.egl.GetConfigs ||
+        !_glfw.egl.ChooseConfig ||
         !_glfw.egl.GetDisplay ||
         !_glfw.egl.GetError ||
         !_glfw.egl.Initialize ||
@@ -572,18 +544,16 @@ bool _glfwCreateContextEGL(_GLFWwindow* window,
     }
 
     // Set up attributes for surface creation
+    index = 0;
+
+    if (fbconfig->sRGB)
     {
-        int index = 0;
-
-        if (fbconfig->sRGB)
-        {
-            if (_glfw.egl.KHR_gl_colorspace)
-                setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
-        }
-
-        setAttrib(EGL_NONE, EGL_NONE);
+        if (_glfw.egl.KHR_gl_colorspace)
+            setAttrib(EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR);
     }
 
+    setAttrib(EGL_NONE, EGL_NONE);
+
     window->context.egl.surface =
         eglCreateWindowSurface(_glfw.egl.display,
                                config,

glfw/egl_context.h

@@ -120,6 +120,7 @@ typedef void* EGLSurface;
 // EGL function pointer typedefs
 typedef EGLBoolean (EGLAPIENTRY * PFN_eglGetConfigAttrib)(EGLDisplay,EGLConfig,EGLint,EGLint*);
 typedef EGLBoolean (EGLAPIENTRY * PFN_eglGetConfigs)(EGLDisplay,EGLConfig*,EGLint,EGLint*);
+typedef EGLBoolean (EGLAPIENTRY * PFN_eglChooseConfig)(EGLDisplay,EGLint const*,EGLConfig*,EGLint,EGLint*);
 typedef EGLDisplay (EGLAPIENTRY * PFN_eglGetDisplay)(EGLNativeDisplayType);
 typedef EGLint (EGLAPIENTRY * PFN_eglGetError)(void);
 typedef EGLBoolean (EGLAPIENTRY * PFN_eglInitialize)(EGLDisplay,EGLint*,EGLint*);
@@ -136,6 +137,7 @@ typedef const char* (EGLAPIENTRY * PFN_eglQueryString)(EGLDisplay,EGLint);
 typedef GLFWglproc (EGLAPIENTRY * PFN_eglGetProcAddress)(const char*);
 #define eglGetConfigAttrib _glfw.egl.GetConfigAttrib
 #define eglGetConfigs _glfw.egl.GetConfigs
+#define eglChooseConfig _glfw.egl.ChooseConfig
 #define eglGetDisplay _glfw.egl.GetDisplay
 #define eglGetError _glfw.egl.GetError
 #define eglInitialize _glfw.egl.Initialize
@@ -185,6 +187,7 @@ typedef struct _GLFWlibraryEGL
 
     PFN_eglGetConfigAttrib      GetConfigAttrib;
     PFN_eglGetConfigs           GetConfigs;
+    PFN_eglChooseConfig         ChooseConfig;
     PFN_eglGetDisplay           GetDisplay;
     PFN_eglGetError             GetError;
     PFN_eglInitialize           Initialize;

glfw/glfw.py

@@ -6,7 +6,7 @@ import json
 import os
 import re
 import sys
-from typing import Callable, List, Optional, Tuple
+from typing import Callable, Dict, List, Optional, Tuple
 
 _plat = sys.platform.lower()
 is_linux = 'linux' in _plat
@@ -19,6 +19,7 @@ class Env:
     cppflags: List[str] = []
     cflags: List[str] = []
     ldflags: List[str] = []
+    library_paths: Dict[str, List[str]] = {}
     ldpaths: List[str] = []
     ccver: Tuple[int, int]
 
@@ -32,13 +33,13 @@ class Env:
 
     def __init__(
         self, cc: str = '', cppflags: List[str] = [], cflags: List[str] = [], ldflags: List[str] = [],
-        ldpaths: Optional[List[str]] = None, ccver: Tuple[int, int] = (0, 0)
+        library_paths: Dict[str, List[str]] = {}, ldpaths: Optional[List[str]] = None, ccver: Tuple[int, int] = (0, 0)
     ):
-        self.cc, self.cppflags, self.cflags, self.ldflags, self.ldpaths = cc, cppflags, cflags, ldflags, [] if ldpaths is None else ldpaths
-        self.ccver = ccver
+        self.cc, self.cppflags, self.cflags, self.ldflags, self.library_paths = cc, cppflags, cflags, ldflags, library_paths
+        self.ldpaths, self.ccver = [] if ldpaths is None else ldpaths, ccver
 
     def copy(self) -> 'Env':
-        ans = Env(self.cc, list(self.cppflags), list(self.cflags), list(self.ldflags), list(self.ldpaths), self.ccver)
+        ans = Env(self.cc, list(self.cppflags), list(self.cflags), list(self.ldflags), dict(self.library_paths), list(self.ldpaths), self.ccver)
         ans.all_headers = list(self.all_headers)
         ans.sources = list(self.sources)
         ans.wayland_packagedir = self.wayland_packagedir
@@ -55,7 +56,7 @@ def wayland_protocol_file_name(base: str, ext: str = 'c') -> str:
 
 def init_env(env: Env, pkg_config: Callable, at_least_version: Callable, test_compile: Callable, module: str = 'x11') -> Env:
     ans = env.copy()
-    ans.cflags.append('-fpic')
+    ans.cflags.append('-fPIC')
     ans.cppflags.append('-D_GLFW_' + module.upper())
     ans.cppflags.append('-D_GLFW_BUILD_DLL')
 
@@ -95,7 +96,7 @@ def init_env(env: Env, pkg_config: Callable, at_least_version: Callable, test_co
         for p in ans.wayland_protocols:
             ans.sources.append(wayland_protocol_file_name(p))
             ans.all_headers.append(wayland_protocol_file_name(p, 'h'))
-        for dep in 'wayland-egl wayland-client wayland-cursor xkbcommon dbus-1'.split():
+        for dep in 'wayland-client wayland-cursor xkbcommon dbus-1'.split():
             ans.cflags.extend(pkg_config(dep, '--cflags-only-I'))
             ans.ldpaths.extend(pkg_config(dep, '--libs'))
         has_memfd_create = test_compile(env.cc, '-Werror', src='''#define _GNU_SOURCE

glfw/glfw3.h

@@ -195,7 +195,38 @@ extern "C" {
 
  #endif /*__APPLE__*/
 
-#elif !defined(GLFW_INCLUDE_NONE)
+#elif defined(GLFW_INCLUDE_GLU)
+
+ #if defined(__APPLE__)
+
+  #if defined(GLFW_INCLUDE_GLU)
+   #include <OpenGL/glu.h>
+  #endif
+
+ #else /*__APPLE__*/
+
+  #if defined(GLFW_INCLUDE_GLU)
+   #include <GL/glu.h>
+  #endif
+
+ #endif /*__APPLE__*/
+
+#elif !defined(GLFW_INCLUDE_NONE) && \
+      !defined(__gl_h_) && \
+      !defined(__gles1_gl_h_) && \
+      !defined(__gles2_gl2_h_) && \
+      !defined(__gles2_gl3_h_) && \
+      !defined(__gles2_gl31_h_) && \
+      !defined(__gles2_gl32_h_) && \
+      !defined(__gl_glcorearb_h_) && \
+      !defined(__gl2_h_) /*legacy*/ && \
+      !defined(__gl3_h_) /*legacy*/ && \
+      !defined(__gl31_h_) /*legacy*/ && \
+      !defined(__gl32_h_) /*legacy*/ && \
+      !defined(__glcorearb_h_) /*legacy*/ && \
+      !defined(__GL_H__) /*non-standard*/ && \
+      !defined(__gltypes_h_) /*non-standard*/ && \
+      !defined(__glee_h_) /*non-standard*/
 
  #if defined(__APPLE__)
 
@@ -203,9 +234,6 @@ extern "C" {
    #define GL_GLEXT_LEGACY
   #endif
   #include <OpenGL/gl.h>
-  #if defined(GLFW_INCLUDE_GLU)
-   #include <OpenGL/glu.h>
-  #endif
 
  #else /*__APPLE__*/
 
@@ -213,9 +241,6 @@ extern "C" {
   #if defined(GLFW_INCLUDE_GLEXT)
    #include <GL/glext.h>
   #endif
-  #if defined(GLFW_INCLUDE_GLU)
-   #include <GL/glu.h>
-  #endif
 
  #endif /*__APPLE__*/
 
@@ -806,6 +831,33 @@ extern "C" {
  *  @analysis Application programmer error.  Fix the offending call.
  */
 #define GLFW_NO_WINDOW_CONTEXT      0x0001000A
+/*! @brief The reuqested feature is not provided by the platform.
+ *
+ *  The requested feature is not provided by the platform, so GLFW is unable to
+ *  implement it.  The documentation for each function notes if it could emit
+ *  this error.
+ *
+ *  @analysis Platform or platform version limitation.  The error can be ignored
+ *  unless the feature is critical to the application.
+ *
+ *  @par
+ *  A function call that emits this error has no effect other than the error and
+ *  updating any existing out parameters.
+ */
+#define GLFW_FEATURE_UNAVAILABLE    0x0001000C
+/*! @brief The requested feature is not implemented for the platform.
+ *
+ *  The requested feature has not yet been implemented in GLFW for this platform.
+ *
+ *  @analysis An incomplete implementation of GLFW for this platform, hopefully
+ *  fixed in a future release.  The error can be ignored unless the feature is
+ *  critical to the application.
+ *
+ *  @par
+ *  A function call that emits this error has no effect other than the error and
+ *  updating any existing out parameters.
+ */
+#define GLFW_FEATURE_UNIMPLEMENTED  0x0001000D
 /*! @} */
 
 /*! @addtogroup window
@@ -1076,6 +1128,7 @@ extern "C" {
 #define GLFW_STICKY_KEYS            0x00033002
 #define GLFW_STICKY_MOUSE_BUTTONS   0x00033003
 #define GLFW_LOCK_KEY_MODS          0x00033004
+#define GLFW_RAW_MOUSE_MOTION       0x00033005
 
 #define GLFW_CURSOR_NORMAL          0x00034001
 #define GLFW_CURSOR_HIDDEN          0x00034002
@@ -1319,6 +1372,22 @@ typedef void (* GLFWwindowsizefun)(GLFWwindow*,int,int);
  */
 typedef void (* GLFWwindowclosefun)(GLFWwindow*);
 
+/*! @brief The function pointer type for application close callbacks.
+ *
+ *  This is the function pointer type for application close callbacks.  A application
+ *  close callback function has the following signature:
+ *  @code
+ *  void function_name(int flags)
+ *  @endcode
+ *
+ *  @param[in] flags 0 for a user requested application quit, 1 if a fatal error occurred and application should quit ASAP
+ *
+ *  @sa @ref glfwSetApplicationCloseCallback
+ *
+ *  @ingroup window
+ */
+typedef void (* GLFWapplicationclosefun)(int);
+
 /*! @brief The function pointer type for window content refresh callbacks.
  *
  *  This is the function pointer type for window content refresh callbacks.
@@ -1550,6 +1619,7 @@ typedef void (* GLFWcursorenterfun)(GLFWwindow*,int);
  *  value 2 for stationary momentum scrolling, value 3 for momentum scrolling
  *  in progress, value 4 for momentum scrolling ended, value 5 for momentum
  *  scrolling cancelled and value 6 if scrolling may begin soon.
+ *  @param[int] mods The keyboard modifiers
  *
  *  @sa @ref scrolling
  *  @sa @ref glfwSetScrollCallback
@@ -1559,7 +1629,7 @@ typedef void (* GLFWcursorenterfun)(GLFWwindow*,int);
  *
  *  @ingroup input
  */
-typedef void (* GLFWscrollfun)(GLFWwindow*,double,double,int);
+typedef void (* GLFWscrollfun)(GLFWwindow*,double,double,int,int);
 
 /*! @brief The function pointer type for key callbacks.
  *
@@ -1835,6 +1905,8 @@ GLFWAPI void glfwRemoveTimer(unsigned long long);
  *  call this function, as it is called by @ref glfwInit before it returns
  *  failure.
  *
+ *  This function has no effect if GLFW is not initialized.
+ *
  *  @errors Possible errors include @ref GLFW_PLATFORM_ERROR.
  *
  *  @remark This function may be called before @ref glfwInit.
@@ -2832,21 +2904,21 @@ GLFWAPI void glfwSetWindowTitle(GLFWwindow* window, const char* title);
  *  @param[in] images The images to create the icon from.  This is ignored if
  *  count is zero.
  *
- *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
- *  GLFW_PLATFORM_ERROR.
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
+ *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
  *  @pointer_lifetime The specified image data is copied before this function
  *  returns.
  *
- *  @remark @macos The GLFW window has no icon, as it is not a document
- *  window, so this function does nothing.  The dock icon will be the same as
+ *  @remark @macos Regular windows do not have icons on macOS.  This function
+ *  will emit @ref GLFW_FEATURE_UNAVAILABLE.  The dock icon will be the same as
  *  the application bundle's icon.  For more information on bundles, see the
  *  [Bundle Programming Guide](https://developer.apple.com/library/mac/documentation/CoreFoundation/Conceptual/CFBundles/)
  *  in the Mac Developer Library.
  *
  *  @remark @wayland There is no existing protocol to change an icon, the
  *  window will thus inherit the one defined in the application's desktop file.
- *  This function always emits @ref GLFW_PLATFORM_ERROR.
+ *  This function will emit @ref GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -2872,12 +2944,12 @@ GLFWAPI void glfwSetWindowIcon(GLFWwindow* window, int count, const GLFWimage* i
  *  @param[out] ypos Where to store the y-coordinate of the upper-left corner of
  *  the content area, or `NULL`.
  *
- *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
- *  GLFW_PLATFORM_ERROR.
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
+ *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
  *  @remark @wayland There is no way for an application to retrieve the global
- *  position of its windows, this function will always emit @ref
- *  GLFW_PLATFORM_ERROR.
+ *  position of its windows.  This function will emit @ref
+ *  GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -2906,12 +2978,12 @@ GLFWAPI void glfwGetWindowPos(GLFWwindow* window, int* xpos, int* ypos);
  *  @param[in] xpos The x-coordinate of the upper-left corner of the content area.
  *  @param[in] ypos The y-coordinate of the upper-left corner of the content area.
  *
- *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
- *  GLFW_PLATFORM_ERROR.
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
+ *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
  *  @remark @wayland There is no way for an application to set the global
- *  position of its windows, this function will always emit @ref
- *  GLFW_PLATFORM_ERROR.
+ *  position of its windows.  This function will emit @ref
+ *  GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -3289,8 +3361,11 @@ GLFWAPI float glfwGetWindowOpacity(GLFWwindow* window);
  *  @param[in] window The window to set the opacity for.
  *  @param[in] opacity The desired opacity of the specified window.
  *
- *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
- *  GLFW_PLATFORM_ERROR.
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
+ *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
+ *
+ *  @remark @wayland There is no way to set an opacity factor for a window.
+ *  This function will emit @ref GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -3457,11 +3532,11 @@ GLFWAPI void glfwHideWindow(GLFWwindow* window);
  *
  *  @param[in] window The window to give input focus.
  *
- *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
- *  GLFW_PLATFORM_ERROR.
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
+ *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
- *  @remark @wayland It is not possible for an application to bring its windows
- *  to front, this function will always emit @ref GLFW_PLATFORM_ERROR.
+ *  @remark @wayland It is not possible for an application to set the input
+ *  focus.  This function will emit @ref GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -3826,6 +3901,7 @@ GLFWAPI GLFWwindowsizefun glfwSetWindowSizeCallback(GLFWwindow* window, GLFWwind
  *  @ingroup window
  */
 GLFWAPI GLFWwindowclosefun glfwSetWindowCloseCallback(GLFWwindow* window, GLFWwindowclosefun callback);
+GLFWAPI GLFWapplicationclosefun glfwSetApplicationCloseCallback(GLFWapplicationclosefun callback);
 
 /*! @brief Sets the refresh callback for the specified window.
  *
@@ -4075,11 +4151,13 @@ GLFWAPI void glfwPostEmptyEvent(void);
  *
  *  This function returns the value of an input option for the specified window.
  *  The mode must be one of @ref GLFW_CURSOR, @ref GLFW_STICKY_KEYS,
- *  @ref GLFW_STICKY_MOUSE_BUTTONS or @ref GLFW_LOCK_KEY_MODS.
+ *  @ref GLFW_STICKY_MOUSE_BUTTONS, @ref GLFW_LOCK_KEY_MODS or
+ *  @ref GLFW_RAW_MOUSE_MOTION.
  *
  *  @param[in] window The window to query.
  *  @param[in] mode One of `GLFW_CURSOR`, `GLFW_STICKY_KEYS`,
- *  `GLFW_STICKY_MOUSE_BUTTONS` or `GLFW_LOCK_KEY_MODS`.
+ *  `GLFW_STICKY_MOUSE_BUTTONS`, `GLFW_LOCK_KEY_MODS` or
+ *  `GLFW_RAW_MOUSE_MOTION`.
  *
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
  *  GLFW_INVALID_ENUM.
@@ -4098,7 +4176,8 @@ GLFWAPI int glfwGetInputMode(GLFWwindow* window, int mode);
  *
  *  This function sets an input mode option for the specified window.  The mode
  *  must be one of @ref GLFW_CURSOR, @ref GLFW_STICKY_KEYS,
- *  @ref GLFW_STICKY_MOUSE_BUTTONS or @ref GLFW_LOCK_KEY_MODS.
+ *  @ref GLFW_STICKY_MOUSE_BUTTONS, @ref GLFW_LOCK_KEY_MODS or
+ *  @ref GLFW_RAW_MOUSE_MOTION.
  *
  *  If the mode is `GLFW_CURSOR`, the value must be one of the following cursor
  *  modes:
@@ -4130,13 +4209,21 @@ GLFWAPI int glfwGetInputMode(GLFWwindow* window, int mode);
  *  GLFW_MOD_CAPS_LOCK bit set when the event was generated with Caps Lock on,
  *  and the @ref GLFW_MOD_NUM_LOCK bit when Num Lock was on.
  *
+ *  If the mode is `GLFW_RAW_MOUSE_MOTION`, the value must be either `true`
+ *  to enable raw (unscaled and unaccelerated) mouse motion when the cursor is
+ *  disabled, or `false` to disable it.  If raw motion is not supported,
+ *  attempting to set this will emit @ref GLFW_FEATURE_UNAVAILABLE.  Call @ref
+ *  glfwRawMouseMotionSupported to check for support.
+ *
  *  @param[in] window The window whose input mode to set.
  *  @param[in] mode One of `GLFW_CURSOR`, `GLFW_STICKY_KEYS`,
- *  `GLFW_STICKY_MOUSE_BUTTONS` or `GLFW_LOCK_KEY_MODS`.
+ *  `GLFW_STICKY_MOUSE_BUTTONS`, `GLFW_LOCK_KEY_MODS` or
+ *  `GLFW_RAW_MOUSE_MOTION`.
  *  @param[in] value The new value of the specified input mode.
  *
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
- *  GLFW_INVALID_ENUM and @ref GLFW_PLATFORM_ERROR.
+ *  GLFW_INVALID_ENUM, @ref GLFW_PLATFORM_ERROR and @ref
+ *  GLFW_FEATURE_UNAVAILABLE (see above).
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -4148,6 +4235,35 @@ GLFWAPI int glfwGetInputMode(GLFWwindow* window, int mode);
  */
 GLFWAPI void glfwSetInputMode(GLFWwindow* window, int mode, int value);
 
+/*! @brief Returns whether raw mouse motion is supported.
+ *
+ *  This function returns whether raw mouse motion is supported on the current
+ *  system.  This status does not change after GLFW has been initialized so you
+ *  only need to check this once.  If you attempt to enable raw motion on
+ *  a system that does not support it, @ref GLFW_PLATFORM_ERROR will be emitted.
+ *
+ *  Raw mouse motion is closer to the actual motion of the mouse across
+ *  a surface.  It is not affected by the scaling and acceleration applied to
+ *  the motion of the desktop cursor.  That processing is suitable for a cursor
+ *  while raw motion is better for controlling for example a 3D camera.  Because
+ *  of this, raw mouse motion is only provided when the cursor is disabled.
+ *
+ *  @return `true` if raw mouse motion is supported on the current machine,
+ *  or `false` otherwise.
+ *
+ *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
+ *
+ *  @thread_safety This function must only be called from the main thread.
+ *
+ *  @sa @ref raw_mouse_motion
+ *  @sa @ref glfwSetInputMode
+ *
+ *  @since Added in version 3.3.
+ *
+ *  @ingroup input
+ */
+GLFWAPI int glfwRawMouseMotionSupported(void);
+
 /*! @brief Returns the layout-specific name of the specified printable key.
  *
  *  This function returns the name of the specified printable key, encoded as

glfw/glx_context.c

@@ -47,99 +47,87 @@ static int getGLXFBConfigAttrib(GLXFBConfig fbconfig, int attrib)
     return value;
 }
 
+static GLXFBConfig*
+choose_fb_config(const _GLFWfbconfig* desired, bool trust_window_bit, int *nelements) {
+    int attrib_list[64];
+    int pos = 0;
+#define ATTR(x, y) { attrib_list[pos++] = x; attrib_list[pos++] = y; }
+
+    ATTR(GLX_DOUBLEBUFFER, desired->doublebuffer ? True : False);
+    if (desired->stereo > 0) ATTR(GLX_STEREO, desired->stereo ? True : False);
+    if (desired->auxBuffers > 0) ATTR(GLX_AUX_BUFFERS, desired->auxBuffers);
+    if (_glfw.glx.ARB_multisample && desired->samples > 0) ATTR(GLX_SAMPLES, desired->samples);
+    if (desired->depthBits != GLFW_DONT_CARE) ATTR(GLX_DEPTH_SIZE, desired->depthBits);
+    if (desired->stencilBits != GLFW_DONT_CARE) ATTR(GLX_STENCIL_SIZE, desired->stencilBits);
+    if (desired->redBits != GLFW_DONT_CARE) ATTR(GLX_RED_SIZE, desired->redBits);
+    if (desired->greenBits != GLFW_DONT_CARE) ATTR(GLX_GREEN_SIZE, desired->greenBits);
+    if (desired->blueBits != GLFW_DONT_CARE) ATTR(GLX_BLUE_SIZE, desired->blueBits);
+    if (desired->alphaBits != GLFW_DONT_CARE) ATTR(GLX_ALPHA_SIZE, desired->alphaBits);
+    if (desired->accumRedBits != GLFW_DONT_CARE) ATTR(GLX_ACCUM_RED_SIZE, desired->accumRedBits);
+    if (desired->accumGreenBits != GLFW_DONT_CARE) ATTR(GLX_ACCUM_GREEN_SIZE, desired->accumGreenBits);
+    if (desired->accumBlueBits != GLFW_DONT_CARE) ATTR(GLX_ACCUM_BLUE_SIZE, desired->accumBlueBits);
+    if (desired->accumAlphaBits != GLFW_DONT_CARE) ATTR(GLX_ACCUM_ALPHA_SIZE, desired->accumAlphaBits);
+    if (!trust_window_bit) ATTR(GLX_DRAWABLE_TYPE, 0);
+    ATTR(None, None);
+    return glXChooseFBConfig(_glfw.x11.display, _glfw.x11.screen, attrib_list, nelements);
+#undef ATTR
+}
+
+
 // Return the GLXFBConfig most closely matching the specified hints
 //
 static bool chooseGLXFBConfig(const _GLFWfbconfig* desired,
                                   GLXFBConfig* result)
 {
     GLXFBConfig* nativeConfigs;
-    _GLFWfbconfig* usableConfigs;
-    const _GLFWfbconfig* closest;
-    int i, nativeCount, usableCount;
+    int i, nativeCount, ans_idx = 0;
     const char* vendor;
     bool trustWindowBit = true;
+    static _GLFWfbconfig prev_desired  = {0};
+    static GLXFBConfig prev_result = 0;
+    if (prev_result != 0 && memcmp(&prev_desired, desired, sizeof(_GLFWfbconfig)) == 0) {
+        *result = prev_result;
+        return true;
+    }
+    prev_desired = *desired;
 
     // HACK: This is a (hopefully temporary) workaround for Chromium
     //       (VirtualBox GL) not setting the window bit on any GLXFBConfigs
     vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
     if (vendor && strcmp(vendor, "Chromium") == 0)
         trustWindowBit = false;
-
-    nativeConfigs =
-        glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, &nativeCount);
+    nativeConfigs = choose_fb_config(desired, trustWindowBit, &nativeCount);
     if (!nativeConfigs || !nativeCount)
     {
         _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: No GLXFBConfigs returned");
         return false;
     }
-
-    usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
-    usableCount = 0;
-
     for (i = 0;  i < nativeCount;  i++)
     {
         const GLXFBConfig n = nativeConfigs[i];
-        _GLFWfbconfig* u = usableConfigs + usableCount;
-
-        // Only consider RGBA GLXFBConfigs
-        if (!(getGLXFBConfigAttrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT))
-            continue;
-
-        // Only consider window GLXFBConfigs
-        if (!(getGLXFBConfigAttrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
-        {
-            if (trustWindowBit)
-                continue;
-        }
-
-        if (desired->transparent)
-        {
+        bool transparency_matches = true, srgb_matches = true;
+        if (desired->transparent) {
+            transparency_matches = false;
             XVisualInfo* vi = glXGetVisualFromFBConfig(_glfw.x11.display, n);
-            if (vi)
-            {
-                u->transparent = _glfwIsVisualTransparentX11(vi->visual);
-                XFree(vi);
-            }
+            if (vi && _glfwIsVisualTransparentX11(vi->visual)) transparency_matches = true;
         }
 
-        u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
-        u->greenBits = getGLXFBConfigAttrib(n, GLX_GREEN_SIZE);
-        u->blueBits = getGLXFBConfigAttrib(n, GLX_BLUE_SIZE);
+        if (desired->sRGB && (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)) {
+            srgb_matches = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB) ? true : false;
+        }
 
-        u->alphaBits = getGLXFBConfigAttrib(n, GLX_ALPHA_SIZE);
-        u->depthBits = getGLXFBConfigAttrib(n, GLX_DEPTH_SIZE);
-        u->stencilBits = getGLXFBConfigAttrib(n, GLX_STENCIL_SIZE);
+        if (transparency_matches && srgb_matches) {
+            ans_idx = i; break;
+        }
 
-        u->accumRedBits = getGLXFBConfigAttrib(n, GLX_ACCUM_RED_SIZE);
-        u->accumGreenBits = getGLXFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE);
-        u->accumBlueBits = getGLXFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE);
-        u->accumAlphaBits = getGLXFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE);
-
-        u->auxBuffers = getGLXFBConfigAttrib(n, GLX_AUX_BUFFERS);
-
-        if (getGLXFBConfigAttrib(n, GLX_STEREO))
-            u->stereo = true;
-        if (getGLXFBConfigAttrib(n, GLX_DOUBLEBUFFER))
-            u->doublebuffer = true;
-
-        if (_glfw.glx.ARB_multisample)
-            u->samples = getGLXFBConfigAttrib(n, GLX_SAMPLES);
-
-        if (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)
-            u->sRGB = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
-
-        u->handle = (uintptr_t) n;
-        usableCount++;
     }
 
-    closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
-    if (closest)
-        *result = (GLXFBConfig) closest->handle;
+    *result = nativeConfigs[ans_idx];
+    prev_result = nativeConfigs[ans_idx];
 
     XFree(nativeConfigs);
-    free(usableConfigs);
 
-    return closest != NULL;
+    return true;
 }
 
 // Create the OpenGL context using legacy API
@@ -287,6 +275,7 @@ bool _glfwInitGLX(void)
 
     glfw_dlsym(_glfw.glx.GetFBConfigs, _glfw.glx.handle, "glXGetFBConfigs");
     glfw_dlsym(_glfw.glx.GetFBConfigAttrib, _glfw.glx.handle, "glXGetFBConfigAttrib");
+    glfw_dlsym(_glfw.glx.ChooseFBConfig, _glfw.glx.handle, "glXChooseFBConfig");
     glfw_dlsym(_glfw.glx.GetClientString, _glfw.glx.handle, "glXGetClientString");
     glfw_dlsym(_glfw.glx.QueryExtension, _glfw.glx.handle, "glXQueryExtension");
     glfw_dlsym(_glfw.glx.QueryVersion, _glfw.glx.handle, "glXQueryVersion");

glfw/glx_context.h

@@ -73,6 +73,7 @@ typedef struct __GLXcontext* GLXContext;
 typedef void (*__GLXextproc)(void);
 
 typedef int (*PFNGLXGETFBCONFIGATTRIBPROC)(Display*,GLXFBConfig,int,int*);
+typedef GLXFBConfig* (*PFNGLXCHOOSEFBCONFIGPROC)(Display*,int,const int*,int*);
 typedef const char* (*PFNGLXGETCLIENTSTRINGPROC)(Display*,int);
 typedef Bool (*PFNGLXQUERYEXTENSIONPROC)(Display*,int*,int*);
 typedef Bool (*PFNGLXQUERYVERSIONPROC)(Display*,int*,int*);
@@ -95,6 +96,7 @@ typedef GLXContext (*PFNGLXCREATECONTEXTATTRIBSARBPROC)(Display*,GLXFBConfig,GLX
 // libGL.so function pointer typedefs
 #define glXGetFBConfigs _glfw.glx.GetFBConfigs
 #define glXGetFBConfigAttrib _glfw.glx.GetFBConfigAttrib
+#define glXChooseFBConfig _glfw.glx.ChooseFBConfig
 #define glXGetClientString _glfw.glx.GetClientString
 #define glXQueryExtension _glfw.glx.QueryExtension
 #define glXQueryVersion _glfw.glx.QueryVersion
@@ -134,6 +136,7 @@ typedef struct _GLFWlibraryGLX
     // GLX 1.3 functions
     PFNGLXGETFBCONFIGSPROC              GetFBConfigs;
     PFNGLXGETFBCONFIGATTRIBPROC         GetFBConfigAttrib;
+    PFNGLXCHOOSEFBCONFIGPROC            ChooseFBConfig;
     PFNGLXGETCLIENTSTRINGPROC           GetClientString;
     PFNGLXQUERYEXTENSIONPROC            QueryExtension;
     PFNGLXQUERYVERSIONPROC              QueryVersion;

glfw/init.c

@@ -168,6 +168,10 @@ void _glfwInputError(int code, const char* format, ...)
             strcpy(description, "The requested format is unavailable");
         else if (code == GLFW_NO_WINDOW_CONTEXT)
             strcpy(description, "The specified window has no context");
+        else if (code == GLFW_FEATURE_UNAVAILABLE)
+            strcpy(description, "The requested feature cannot be implemented for this platform");
+        else if (code == GLFW_FEATURE_UNIMPLEMENTED)
+            strcpy(description, "The requested feature has not yet been implemented for this platform");
         else
             strcpy(description, "ERROR: UNKNOWN GLFW ERROR");
     }
@@ -363,3 +367,10 @@ GLFWAPI void glfwUpdateTimer(unsigned long long timer_id, monotonic_t interval,
 GLFWAPI void glfwRemoveTimer(unsigned long long timer_id) {
     _glfwPlatformRemoveTimer(timer_id);
 }
+
+GLFWAPI GLFWapplicationclosefun glfwSetApplicationCloseCallback(GLFWapplicationclosefun cbfun)
+{
+    _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
+    _GLFW_SWAP_POINTERS(_glfw.callbacks.application_close, cbfun);
+    return cbfun;
+}

glfw/input.c

@@ -300,10 +300,10 @@ void _glfwInputKeyboard(_GLFWwindow* window, GLFWkeyevent* ev)
 
 // Notifies shared code of a scroll event
 //
-void _glfwInputScroll(_GLFWwindow* window, double xoffset, double yoffset, int flags)
+void _glfwInputScroll(_GLFWwindow* window, double xoffset, double yoffset, int flags, int mods)
 {
     if (window->callbacks.scroll)
-        window->callbacks.scroll((GLFWwindow*) window, xoffset, yoffset, flags);
+        window->callbacks.scroll((GLFWwindow*) window, xoffset, yoffset, flags, mods);
 }
 
 // Notifies shared code of a mouse button click event
@@ -675,6 +675,8 @@ GLFWAPI int glfwGetInputMode(GLFWwindow* handle, int mode)
             return window->stickyMouseButtons;
         case GLFW_LOCK_KEY_MODS:
             return window->lockKeyMods;
+        case GLFW_RAW_MOUSE_MOTION:
+            return window->rawMouseMotion;
     }
 
     _glfwInputError(GLFW_INVALID_ENUM, "Invalid input mode 0x%08X", mode);
@@ -754,10 +756,32 @@ GLFWAPI void glfwSetInputMode(GLFWwindow* handle, int mode, int value)
     {
         window->lockKeyMods = value ? true : false;
     }
+    else if (mode == GLFW_RAW_MOUSE_MOTION)
+    {
+        if (!_glfwPlatformRawMouseMotionSupported())
+        {
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "Raw mouse motion is not supported on this system");
+            return;
+        }
+
+        value = value ? true : false;
+        if (window->rawMouseMotion == value)
+            return;
+
+        window->rawMouseMotion = value;
+        _glfwPlatformSetRawMouseMotion(window, value);
+    }
     else
         _glfwInputError(GLFW_INVALID_ENUM, "Invalid input mode 0x%08X", mode);
 }
 
+GLFWAPI int glfwRawMouseMotionSupported(void)
+{
+    _GLFW_REQUIRE_INIT_OR_RETURN(false);
+    return _glfwPlatformRawMouseMotionSupported();
+}
+
 GLFWAPI const char* glfwGetKeyName(int key, int native_key)
 {
     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
@@ -1412,8 +1436,18 @@ GLFWAPI int glfwGetGamepadState(int jid, GLFWgamepadstate* state)
         if (e->type == _GLFW_JOYSTICK_AXIS)
         {
             const float value = js->axes[e->index] * e->axisScale + e->axisOffset;
-            if (value > 0.f)
-                state->buttons[i] = GLFW_PRESS;
+            // HACK: This should be baked into the value transform
+            // TODO: Bake into transform when implementing output modifiers
+            if (e->axisOffset < 0 || (e->axisOffset == 0 && e->axisScale > 0))
+            {
+                if (value >= 0.f)
+                    state->buttons[i] = GLFW_PRESS;
+            }
+            else
+            {
+                if (value <= 0.f)
+                    state->buttons[i] = GLFW_PRESS;
+            }
         }
         else if (e->type == _GLFW_JOYSTICK_HATBIT)
         {

glfw/internal.h

@@ -429,6 +429,7 @@ struct _GLFWwindow
     char                keys[GLFW_KEY_LAST + 1];
     // Virtual cursor position when cursor is disabled
     double              virtualCursorPosX, virtualCursorPosY;
+    bool                rawMouseMotion;
 
     _GLFWcontext        context;
 
@@ -601,8 +602,10 @@ struct _GLFWlibrary
     struct {
         GLFWmonitorfun  monitor;
         GLFWjoystickfun joystick;
+        GLFWapplicationclosefun application_close;
     } callbacks;
 
+
     // This is defined in the window API's platform.h
     _GLFW_PLATFORM_LIBRARY_WINDOW_STATE;
     // This is defined in the context API's context.h
@@ -631,6 +634,8 @@ const char* _glfwPlatformGetVersionString(void);
 void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos);
 void _glfwPlatformSetCursorPos(_GLFWwindow* window, double xpos, double ypos);
 void _glfwPlatformSetCursorMode(_GLFWwindow* window, int mode);
+void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window, bool enabled);
+bool _glfwPlatformRawMouseMotionSupported(void);
 int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
                               const GLFWimage* image, int xhot, int yhot, int count);
 int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, GLFWCursorShape shape);
@@ -755,7 +760,7 @@ void _glfwInputWindowMonitor(_GLFWwindow* window, _GLFWmonitor* monitor);
 
 void _glfwInitializeKeyEvent(GLFWkeyevent *ev, int key, int native_key, int action, int mods);
 void _glfwInputKeyboard(_GLFWwindow *window, GLFWkeyevent *ev);
-void _glfwInputScroll(_GLFWwindow* window, double xoffset, double yoffset, int flags);
+void _glfwInputScroll(_GLFWwindow* window, double xoffset, double yoffset, int flags, int mods);
 void _glfwInputMouseClick(_GLFWwindow* window, int button, int action, int mods);
 void _glfwInputCursorPos(_GLFWwindow* window, double xpos, double ypos);
 void _glfwInputCursorEnter(_GLFWwindow* window, bool entered);
@@ -789,9 +794,6 @@ void _glfwDebug(const char* format, ...);
 //////////////////////////////////////////////////////////////////////////
 
 bool _glfwStringInExtensionString(const char* string, const char* extensions);
-const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
-                                         const _GLFWfbconfig* alternatives,
-                                         unsigned int count);
 bool _glfwRefreshContextAttribs(_GLFWwindow* window,
                                     const _GLFWctxconfig* ctxconfig);
 bool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig);

glfw/null_init.c

@@ -29,6 +29,8 @@
 
 #include "internal.h"
 
+#include <stdlib.h>
+
 
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////
@@ -36,11 +38,14 @@
 
 int _glfwPlatformInit(void)
 {
+    _glfwPollMonitorsNull();
+
     return true;
 }
 
 void _glfwPlatformTerminate(void)
 {
+    free(_glfw.null.clipboardString);
     _glfwTerminateOSMesa();
 }
 

glfw/null_monitor.c

@@ -29,13 +29,45 @@
 
 #include "internal.h"
 
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+// The the sole (fake) video mode of our (sole) fake monitor
+//
+static GLFWvidmode getVideoMode(void)
+{
+    GLFWvidmode mode;
+    mode.width = 1920;
+    mode.height = 1080;
+    mode.redBits = 8;
+    mode.greenBits = 8;
+    mode.blueBits = 8;
+    mode.refreshRate = 60;
+    return mode;
+}
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW internal API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+void _glfwPollMonitorsNull(void)
+{
+    const float dpi = 141.f;
+    const GLFWvidmode mode = getVideoMode();
+    _GLFWmonitor* monitor = _glfwAllocMonitor("Null SuperNoop 0",
+                                              (int) (mode.width * 25.4f / dpi),
+                                              (int) (mode.height * 25.4f / dpi));
+    _glfwInputMonitor(monitor, GLFW_CONNECTED, _GLFW_INSERT_FIRST);
+}
 
 //////////////////////////////////////////////////////////////////////////
 //////                       GLFW platform API                      //////
 //////////////////////////////////////////////////////////////////////////
 
-void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor UNUSED)
+void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor)
 {
+    _glfwFreeGammaArrays(&monitor->null.ramp);
 }
 
 void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor UNUSED, int* xpos UNUSED, int* ypos UNUSED)
@@ -52,26 +84,72 @@ void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor UNUSED,
 }
 
 void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor UNUSED,
-                                     int* xpos UNUSED, int* ypos UNUSED,
-                                     int* width UNUSED, int* height UNUSED)
+                                     int* xpos, int* ypos,
+                                     int* width, int* height)
 {
+    const GLFWvidmode mode = getVideoMode();
+
+    if (xpos)
+        *xpos = 10;
+    if (ypos)
+        ypos = 0;
+    if (width)
+        *width = mode.width;
+    if (height)
+        *height = mode.height - 10;
 }
 
-GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor UNUSED, int* found UNUSED)
+GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor UNUSED, int* found)
 {
-    return NULL;
+    GLFWvidmode* mode = calloc(1, sizeof(GLFWvidmode));
+    *mode = getVideoMode();
+    *found = 1;
+    return mode;
 }
 
-void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor UNUSED, GLFWvidmode* mode UNUSED)
+void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor UNUSED, GLFWvidmode* mode)
 {
+    *mode = getVideoMode();
 }
 
-bool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor UNUSED, GLFWgammaramp* ramp UNUSED)
+bool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
 {
-    return false;
+    if (!monitor->null.ramp.size)
+    {
+        _glfwAllocGammaArrays(&monitor->null.ramp, 256);
+
+        for (unsigned int i = 0;  i < monitor->null.ramp.size;  i++)
+        {
+            const float gamma = 2.2f;
+            float value;
+            value = i / (float) (monitor->null.ramp.size - 1);
+            value = powf(value, 1.f / gamma) * 65535.f + 0.5f;
+            value = _glfw_fminf(value, 65535.f);
+
+            monitor->null.ramp.red[i]   = (unsigned short) value;
+            monitor->null.ramp.green[i] = (unsigned short) value;
+            monitor->null.ramp.blue[i]  = (unsigned short) value;
+        }
+    }
+
+    _glfwAllocGammaArrays(ramp, monitor->null.ramp.size);
+    memcpy(ramp->red,   monitor->null.ramp.red,   sizeof(short) * ramp->size);
+    memcpy(ramp->green, monitor->null.ramp.green, sizeof(short) * ramp->size);
+    memcpy(ramp->blue,  monitor->null.ramp.blue,  sizeof(short) * ramp->size);
+    return true;
 }
 
-void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor UNUSED, const GLFWgammaramp* ramp UNUSED)
+void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
 {
+    if (monitor->null.ramp.size != ramp->size)
+    {
+        _glfwInputError(GLFW_PLATFORM_ERROR,
+                        "Null: Gamma ramp size must match current ramp size");
+        return;
+    }
+
+    memcpy(monitor->null.ramp.red,   ramp->red,   sizeof(short) * ramp->size);
+    memcpy(monitor->null.ramp.green, ramp->green, sizeof(short) * ramp->size);
+    memcpy(monitor->null.ramp.blue,  ramp->blue,  sizeof(short) * ramp->size);
 }
 

glfw/null_platform.h

@@ -27,12 +27,12 @@
 
 #include <dlfcn.h>
 
-#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowNull null
+#define _GLFW_PLATFORM_WINDOW_STATE         _GLFWwindowNull null
+#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryNull null
+#define _GLFW_PLATFORM_MONITOR_STATE        _GLFWmonitorNull null
 
 #define _GLFW_PLATFORM_CONTEXT_STATE
-#define _GLFW_PLATFORM_MONITOR_STATE
 #define _GLFW_PLATFORM_CURSOR_STATE
-#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE
 #define _GLFW_PLATFORM_LIBRARY_CONTEXT_STATE
 #define _GLFW_EGL_CONTEXT_STATE
 #define _GLFW_EGL_LIBRARY_CONTEXT_STATE
@@ -56,7 +56,36 @@
 //
 typedef struct _GLFWwindowNull
 {
-    int width;
-    int height;
+    int             xpos;
+    int             ypos;
+    int             width;
+    int             height;
+    char*           title;
+    bool            visible;
+    bool            iconified;
+    bool            maximized;
+    bool            resizable;
+    bool            decorated;
+    bool            floating;
+    bool            transparent;
+    float           opacity;
 } _GLFWwindowNull;
 
+// Null-specific per-monitor data
+//
+typedef struct _GLFWmonitorNull
+{
+    GLFWgammaramp   ramp;
+} _GLFWmonitorNull;
+
+// Null-specific global data
+//
+typedef struct _GLFWlibraryNull
+{
+    int             xcursor;
+    int             ycursor;
+    char*           clipboardString;
+    _GLFWwindow*    focusedWindow;
+} _GLFWlibraryNull;
+
+void _glfwPollMonitorsNull(void);

glfw/null_window.c

@@ -30,12 +30,71 @@
 #include "internal.h"
 #include "../kitty/monotonic.h"
 
+#include <stdlib.h>
+
+static void applySizeLimits(_GLFWwindow* window, int* width, int* height)
+{
+    if (window->numer != GLFW_DONT_CARE && window->denom != GLFW_DONT_CARE)
+    {
+        const float ratio = (float) window->numer / (float) window->denom;
+        *height = (int) (*width / ratio);
+    }
+
+    if (window->minwidth != GLFW_DONT_CARE && *width < window->minwidth)
+        *width = window->minwidth;
+    else if (window->maxwidth != GLFW_DONT_CARE && *width > window->maxwidth)
+        *width = window->maxwidth;
+
+    if (window->minheight != GLFW_DONT_CARE && *height < window->minheight)
+        *height = window->minheight;
+    else if (window->maxheight != GLFW_DONT_CARE && *height > window->maxheight)
+        *height = window->maxheight;
+}
+
+static void fitToMonitor(_GLFWwindow* window)
+{
+    GLFWvidmode mode;
+    _glfwPlatformGetVideoMode(window->monitor, &mode);
+    _glfwPlatformGetMonitorPos(window->monitor,
+                               &window->null.xpos,
+                               &window->null.ypos);
+    window->null.width = mode.width;
+    window->null.height = mode.height;
+}
+
+static void acquireMonitor(_GLFWwindow* window)
+{
+    _glfwInputMonitorWindow(window->monitor, window);
+}
+
+static void releaseMonitor(_GLFWwindow* window)
+{
+    if (window->monitor->window != window)
+        return;
+
+    _glfwInputMonitorWindow(window->monitor, NULL);
+}
 
 static int createNativeWindow(_GLFWwindow* window,
-                              const _GLFWwndconfig* wndconfig)
+                              const _GLFWwndconfig* wndconfig,
+                              const _GLFWfbconfig* fbconfig)
 {
-    window->null.width = wndconfig->width;
-    window->null.height = wndconfig->height;
+    if (window->monitor)
+        fitToMonitor(window);
+    else
+    {
+        window->null.xpos = 17;
+        window->null.ypos = 17;
+        window->null.width = wndconfig->width;
+        window->null.height = wndconfig->height;
+    }
+
+    window->null.visible = wndconfig->visible;
+    window->null.decorated = wndconfig->decorated;
+    window->null.maximized = wndconfig->maximized;
+    window->null.floating = wndconfig->floating;
+    window->null.transparent = fbconfig->transparent;
+    window->null.opacity = 1.f;
 
     return true;
 }
@@ -50,7 +109,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
                               const _GLFWctxconfig* ctxconfig,
                               const _GLFWfbconfig* fbconfig)
 {
-    if (!createNativeWindow(window, wndconfig))
+    if (!createNativeWindow(window, wndconfig, fbconfig))
         return false;
 
     if (ctxconfig->client != GLFW_NO_API)
@@ -70,11 +129,24 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
         }
     }
 
+    if (window->monitor)
+    {
+        _glfwPlatformShowWindow(window);
+        _glfwPlatformFocusWindow(window);
+        acquireMonitor(window);
+    }
+
     return true;
 }
 
 void _glfwPlatformDestroyWindow(_GLFWwindow* window)
 {
+    if (window->monitor)
+        releaseMonitor(window);
+
+    if (_glfw.null.focusedWindow == window)
+        _glfw.null.focusedWindow = NULL;
+
     if (window->context.destroy)
         window->context.destroy(window);
 }
@@ -88,20 +160,60 @@ void _glfwPlatformSetWindowIcon(_GLFWwindow* window UNUSED, int count UNUSED,
 {
 }
 
-void _glfwPlatformSetWindowMonitor(_GLFWwindow* window UNUSED,
-                                   _GLFWmonitor* monitor UNUSED,
-                                   int xpos UNUSED, int ypos UNUSED,
-                                   int width UNUSED, int height UNUSED,
+void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
+                                   _GLFWmonitor* monitor,
+                                   int xpos, int ypos,
+                                   int width, int height,
                                    int refreshRate UNUSED)
 {
+    if (window->monitor == monitor)
+    {
+        if (!monitor)
+        {
+            _glfwPlatformSetWindowPos(window, xpos, ypos);
+            _glfwPlatformSetWindowSize(window, width, height);
+        }
+
+        return;
+    }
+
+    if (window->monitor)
+        releaseMonitor(window);
+
+    _glfwInputWindowMonitor(window, monitor);
+
+    if (window->monitor)
+    {
+        window->null.visible = true;
+        acquireMonitor(window);
+        fitToMonitor(window);
+    }
+    else
+    {
+        _glfwPlatformSetWindowPos(window, xpos, ypos);
+        _glfwPlatformSetWindowSize(window, width, height);
+    }
 }
 
-void _glfwPlatformGetWindowPos(_GLFWwindow* window UNUSED, int* xpos UNUSED, int* ypos UNUSED)
+void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
 {
+    if (xpos)
+        *xpos = window->null.xpos;
+    if (ypos)
+        *ypos = window->null.ypos;
 }
 
-void _glfwPlatformSetWindowPos(_GLFWwindow* window UNUSED, int xpos UNUSED, int ypos UNUSED)
+void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos)
 {
+    if (window->monitor)
+        return;
+
+    if (window->null.xpos != xpos || window->null.ypos != ypos)
+    {
+        window->null.xpos = xpos;
+        window->null.ypos = ypos;
+        _glfwInputWindowPos(window, xpos, ypos);
+    }
 }
 
 void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
@@ -114,18 +226,34 @@ void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
 
 void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
 {
-    window->null.width = width;
-    window->null.height = height;
+    if (window->monitor)
+        return;
+
+    if (window->null.width != width || window->null.height != height)
+    {
+        window->null.width = width;
+        window->null.height = height;
+        _glfwInputWindowSize(window, width, height);
+        _glfwInputFramebufferSize(window, width, height);
+    }
 }
 
-void _glfwPlatformSetWindowSizeLimits(_GLFWwindow* window UNUSED,
+void _glfwPlatformSetWindowSizeLimits(_GLFWwindow* window,
                                       int minwidth UNUSED, int minheight UNUSED,
                                       int maxwidth UNUSED, int maxheight UNUSED)
 {
+    int width = window->null.width;
+    int height = window->null.height;
+    applySizeLimits(window, &width, &height);
+    _glfwPlatformSetWindowSize(window, width, height);
 }
 
-void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window UNUSED, int n UNUSED, int d UNUSED)
+void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window, int n UNUSED, int d UNUSED)
 {
+    int width = window->null.width;
+    int height = window->null.height;
+    applySizeLimits(window, &width, &height);
+    _glfwPlatformSetWindowSize(window, width, height);
 }
 
 void _glfwPlatformSetWindowSizeIncrements(_GLFWwindow* window UNUSED, int widthincr UNUSED, int heightincr UNUSED)
@@ -140,10 +268,17 @@ void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* heigh
         *height = window->null.height;
 }
 
-void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window UNUSED,
-                                     int* left UNUSED, int* top UNUSED,
-                                     int* right UNUSED, int* bottom UNUSED)
+void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
+                                     int* left, int* top,
+                                     int* right, int* bottom)
 {
+    if (window->null.decorated && !window->monitor)
+    {
+        *left = 1;
+        *top = 10;
+        *right = 1;
+        *bottom = 1;
+    }
 }
 
 void _glfwPlatformGetWindowContentScale(_GLFWwindow* window UNUSED,
@@ -160,59 +295,107 @@ monotonic_t _glfwPlatformGetDoubleClickInterval(_GLFWwindow* window UNUSED)
     return ms_to_monotonic_t(500ll);
 }
 
-void _glfwPlatformIconifyWindow(_GLFWwindow* window UNUSED)
+void _glfwPlatformIconifyWindow(_GLFWwindow* window)
+{
+    if (_glfw.null.focusedWindow == window)
+    {
+        _glfw.null.focusedWindow = NULL;
+        _glfwInputWindowFocus(window, false);
+    }
+
+    if (!window->null.iconified)
+    {
+        window->null.iconified = true;
+        _glfwInputWindowIconify(window, true);
+
+        if (window->monitor)
+            releaseMonitor(window);
+    }
+}
+
+void _glfwPlatformRestoreWindow(_GLFWwindow* window)
+{
+    if (window->null.iconified)
+    {
+        window->null.iconified = false;
+        _glfwInputWindowIconify(window, false);
+
+        if (window->monitor)
+            acquireMonitor(window);
+    }
+    else if (window->null.maximized)
+    {
+        window->null.maximized = false;
+        _glfwInputWindowMaximize(window, false);
+    }
+}
+
+void _glfwPlatformMaximizeWindow(_GLFWwindow* window)
+{
+    if (!window->null.maximized)
+    {
+        window->null.maximized = true;
+        _glfwInputWindowMaximize(window, true);
+    }
+}
+
+int _glfwPlatformWindowMaximized(_GLFWwindow* window)
+{
+    return window->null.maximized;
+}
+
+int _glfwPlatformWindowHovered(_GLFWwindow* window)
+{
+    return _glfw.null.xcursor >= window->null.xpos &&
+           _glfw.null.ycursor >= window->null.ypos &&
+           _glfw.null.xcursor <= window->null.xpos + window->null.width - 1 &&
+           _glfw.null.ycursor <= window->null.ypos + window->null.height - 1;
+}
+
+int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
+{
+    return window->null.transparent;
+}
+
+void _glfwPlatformSetWindowResizable(_GLFWwindow* window, bool enabled)
+{
+    window->null.resizable = enabled;
+}
+
+void _glfwPlatformSetWindowDecorated(_GLFWwindow* window, bool enabled)
+{
+    window->null.decorated = enabled;
+}
+
+void _glfwPlatformSetWindowFloating(_GLFWwindow* window, bool enabled)
+{
+    window->null.floating = enabled;
+}
+
+float _glfwPlatformGetWindowOpacity(_GLFWwindow* window)
+{
+    return window->null.opacity;
+}
+
+void _glfwPlatformSetWindowOpacity(_GLFWwindow* window, float opacity)
+{
+    window->null.opacity = opacity;
+}
+
+void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window UNUSED, bool enabled UNUSED)
 {
 }
 
-void _glfwPlatformRestoreWindow(_GLFWwindow* window UNUSED)
+bool _glfwPlatformRawMouseMotionSupported(void)
 {
+    return true;
 }
 
-void _glfwPlatformMaximizeWindow(_GLFWwindow* window UNUSED)
+void _glfwPlatformShowWindow(_GLFWwindow* window)
 {
+    window->null.visible = true;
 }
 
-int _glfwPlatformWindowMaximized(_GLFWwindow* window UNUSED)
-{
-    return false;
-}
-
-int _glfwPlatformWindowHovered(_GLFWwindow* window UNUSED)
-{
-    return false;
-}
-
-int _glfwPlatformFramebufferTransparent(_GLFWwindow* window UNUSED)
-{
-    return false;
-}
-
-void _glfwPlatformSetWindowResizable(_GLFWwindow* window UNUSED, bool enabled UNUSED)
-{
-}
-
-void _glfwPlatformSetWindowDecorated(_GLFWwindow* window UNUSED, bool enabled UNUSED)
-{
-}
-
-void _glfwPlatformSetWindowFloating(_GLFWwindow* window UNUSED, bool enabled UNUSED)
-{
-}
-
-float _glfwPlatformGetWindowOpacity(_GLFWwindow* window UNUSED)
-{
-    return 1.f;
-}
-
-void _glfwPlatformSetWindowOpacity(_GLFWwindow* window UNUSED, float opacity UNUSED)
-{
-}
-
-void _glfwPlatformShowWindow(_GLFWwindow* window UNUSED)
-{
-}
-
-
 void _glfwPlatformRequestWindowAttention(_GLFWwindow* window UNUSED)
 {
 }
@@ -222,21 +405,41 @@ int _glfwPlatformWindowBell(_GLFWwindow* window UNUSED)
     return false;
 }
 
-void _glfwPlatformUnhideWindow(_GLFWwindow* window UNUSED)
+void _glfwPlatformHideWindow(_GLFWwindow* window)
 {
+    if (_glfw.null.focusedWindow == window)
+    {
+        _glfw.null.focusedWindow = NULL;
+        _glfwInputWindowFocus(window, false);
+    }
+
+    window->null.visible = false;
 }
 
-void _glfwPlatformHideWindow(_GLFWwindow* window UNUSED)
+void _glfwPlatformFocusWindow(_GLFWwindow* window)
 {
+    if (_glfw.null.focusedWindow == window)
+        return;
+
+    if (!window->null.visible)
+        return;
+
+    _GLFWwindow* previous = _glfw.null.focusedWindow;
+    _glfw.null.focusedWindow = window;
+
+    if (previous)
+    {
+        _glfwInputWindowFocus(previous, false);
+        if (previous->monitor && previous->autoIconify)
+            _glfwPlatformIconifyWindow(previous);
+    }
+
+    _glfwInputWindowFocus(window, true);
 }
 
-void _glfwPlatformFocusWindow(_GLFWwindow* window UNUSED)
+int _glfwPlatformWindowFocused(_GLFWwindow* window)
 {
-}
-
-int _glfwPlatformWindowFocused(_GLFWwindow* window UNUSED)
-{
-    return false;
+    return _glfw.null.focusedWindow == window;
 }
 
 int _glfwPlatformWindowOccluded(_GLFWwindow* window UNUSED)
@@ -244,14 +447,14 @@ int _glfwPlatformWindowOccluded(_GLFWwindow* window UNUSED)
     return false;
 }
 
-int _glfwPlatformWindowIconified(_GLFWwindow* window UNUSED)
+int _glfwPlatformWindowIconified(_GLFWwindow* window)
 {
-    return false;
+    return window->null.iconified;
 }
 
-int _glfwPlatformWindowVisible(_GLFWwindow* window UNUSED)
+int _glfwPlatformWindowVisible(_GLFWwindow* window)
 {
-    return false;
+    return window->null.visible;
 }
 
 void _glfwPlatformPollEvents(void)
@@ -270,12 +473,18 @@ void _glfwPlatformPostEmptyEvent(void)
 {
 }
 
-void _glfwPlatformGetCursorPos(_GLFWwindow* window UNUSED, double* xpos UNUSED, double* ypos UNUSED)
+void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos)
 {
+    if (xpos)
+        *xpos = _glfw.null.xcursor - window->null.xpos;
+    if (ypos)
+        *ypos = _glfw.null.ycursor - window->null.ypos;
 }
 
-void _glfwPlatformSetCursorPos(_GLFWwindow* window UNUSED, double x UNUSED, double y UNUSED)
+void _glfwPlatformSetCursorPos(_GLFWwindow* window, double x, double y)
 {
+    _glfw.null.xcursor = window->null.xpos + (int) x;
+    _glfw.null.ycursor = window->null.ypos + (int) y;
 }
 
 void _glfwPlatformSetCursorMode(_GLFWwindow* window UNUSED, int mode UNUSED)
@@ -302,23 +511,142 @@ void _glfwPlatformSetCursor(_GLFWwindow* window UNUSED, _GLFWcursor* cursor UNUS
 {
 }
 
-void _glfwPlatformSetClipboardString(const char* string UNUSED)
+void _glfwPlatformSetClipboardString(const char* string)
 {
+    char* copy = _glfw_strdup(string);
+    free(_glfw.null.clipboardString);
+    _glfw.null.clipboardString = copy;
 }
 
 const char* _glfwPlatformGetClipboardString(void)
 {
+    return _glfw.null.clipboardString;
+}
+
+const char* _glfwPlatformGetNativeKeyName(int native_key)
+{
+    switch (scancode)
+    {
+        case GLFW_KEY_APOSTROPHE:
+            return "'";
+        case GLFW_KEY_COMMA:
+            return ",";
+        case GLFW_KEY_MINUS:
+        case GLFW_KEY_KP_SUBTRACT:
+            return "-";
+        case GLFW_KEY_PERIOD:
+        case GLFW_KEY_KP_DECIMAL:
+            return ".";
+        case GLFW_KEY_SLASH:
+        case GLFW_KEY_KP_DIVIDE:
+            return "/";
+        case GLFW_KEY_SEMICOLON:
+            return ";";
+        case GLFW_KEY_EQUAL:
+        case GLFW_KEY_KP_EQUAL:
+            return "=";
+        case GLFW_KEY_LEFT_BRACKET:
+            return "[";
+        case GLFW_KEY_RIGHT_BRACKET:
+            return "]";
+        case GLFW_KEY_KP_MULTIPLY:
+            return "*";
+        case GLFW_KEY_KP_ADD:
+            return "+";
+        case GLFW_KEY_BACKSLASH:
+        case GLFW_KEY_WORLD_1:
+        case GLFW_KEY_WORLD_2:
+            return "\\";
+        case GLFW_KEY_0:
+        case GLFW_KEY_KP_0:
+            return "0";
+        case GLFW_KEY_1:
+        case GLFW_KEY_KP_1:
+            return "1";
+        case GLFW_KEY_2:
+        case GLFW_KEY_KP_2:
+            return "2";
+        case GLFW_KEY_3:
+        case GLFW_KEY_KP_3:
+            return "3";
+        case GLFW_KEY_4:
+        case GLFW_KEY_KP_4:
+            return "4";
+        case GLFW_KEY_5:
+        case GLFW_KEY_KP_5:
+            return "5";
+        case GLFW_KEY_6:
+        case GLFW_KEY_KP_6:
+            return "6";
+        case GLFW_KEY_7:
+        case GLFW_KEY_KP_7:
+            return "7";
+        case GLFW_KEY_8:
+        case GLFW_KEY_KP_8:
+            return "8";
+        case GLFW_KEY_9:
+        case GLFW_KEY_KP_9:
+            return "9";
+        case GLFW_KEY_A:
+            return "a";
+        case GLFW_KEY_B:
+            return "b";
+        case GLFW_KEY_C:
+            return "c";
+        case GLFW_KEY_D:
+            return "d";
+        case GLFW_KEY_E:
+            return "e";
+        case GLFW_KEY_F:
+            return "f";
+        case GLFW_KEY_G:
+            return "g";
+        case GLFW_KEY_H:
+            return "h";
+        case GLFW_KEY_I:
+            return "i";
+        case GLFW_KEY_J:
+            return "j";
+        case GLFW_KEY_K:
+            return "k";
+        case GLFW_KEY_L:
+            return "l";
+        case GLFW_KEY_M:
+            return "m";
+        case GLFW_KEY_N:
+            return "n";
+        case GLFW_KEY_O:
+            return "o";
+        case GLFW_KEY_P:
+            return "p";
+        case GLFW_KEY_Q:
+            return "q";
+        case GLFW_KEY_R:
+            return "r";
+        case GLFW_KEY_S:
+            return "s";
+        case GLFW_KEY_T:
+            return "t";
+        case GLFW_KEY_U:
+            return "u";
+        case GLFW_KEY_V:
+            return "v";
+        case GLFW_KEY_W:
+            return "w";
+        case GLFW_KEY_X:
+            return "x";
+        case GLFW_KEY_Y:
+            return "y";
+        case GLFW_KEY_Z:
+            return "z";
+    }
+
     return NULL;
 }
 
-const char* _glfwPlatformGetNativeKeyName(int native_key UNUSED)
+int _glfwPlatformGetNativeKeyForKey(int key)
 {
-    return "";
-}
-
-int _glfwPlatformGetNativeKeyForKey(int key UNUSED)
-{
-    return -1;
+    return key;
 }
 
 void _glfwPlatformGetRequiredInstanceExtensions(char** extensions UNUSED)
@@ -338,6 +666,6 @@ VkResult _glfwPlatformCreateWindowSurface(VkInstance instance UNUSED,
                                           VkSurfaceKHR* surface UNUSED)
 {
     // This seems like the most appropriate error to return here
-    return VK_ERROR_INITIALIZATION_FAILED;
+    return VK_ERROR_EXTENSION_NOT_PRESENT;
 }
 

glfw/source-info.json

@@ -54,6 +54,7 @@
     "headers": [
       "wl_platform.h",
       "posix_thread.h",
+      "wl_cursors.h",
       "xkb_glfw.h",
       "dbus_glfw.h",
       "ibus_glfw.h",
@@ -78,6 +79,7 @@
       "wl_init.c",
       "wl_monitor.c",
       "wl_window.c",
+      "wl_cursors.c",
       "posix_thread.c",
       "xkb_glfw.c",
       "dbus_glfw.c",

glfw/wl_cursors.c

@@ -0,0 +1,164 @@
+// Future devs supporting whatever Wayland protocol stabilizes for cursor selection: see _themeAdd.
+
+#include "wl_cursors.h"
+
+#include "internal.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+    struct wl_cursor_theme *theme;
+    int                     px;
+    int                     refcount;
+} _themeData;
+
+struct _wlCursorThemeManager {
+    size_t count;
+    /** Pointer to the head of an unsorted array of themes with no sentinel.
+     *
+     * The lack of sort (and thus forcing a linear search) is intentional;
+     * in most cases, users are likely to have 1-2 different cursor sizes loaded.
+     * For those cases, we get no benefit from sorting and added constant overheads.
+     *
+     * Don't change this to a flexible array member because that complicates growing/shrinking.
+     */
+    _themeData *themes;
+};
+
+static void
+_themeInit(_themeData *dest, const char *name, int px) {
+    dest->px = px;
+    dest->refcount = 1;
+    if (_glfw.wl.shm) {
+        dest->theme = wl_cursor_theme_load(name, px, _glfw.wl.shm);
+        if(!dest->theme) {
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "Wayland: Unable to load cursor theme");
+        }
+    } else {
+        dest->theme = NULL;
+    }
+}
+
+static struct wl_cursor_theme*
+_themeAdd(int px, _wlCursorThemeManager *manager) {
+   ++manager->count;
+   _themeData *temp = realloc(manager->themes, sizeof(_themeData)*manager->count);
+   if (!temp) {
+       _glfwInputError(GLFW_OUT_OF_MEMORY,
+                       "OOM during cursor theme management.");
+       return NULL;
+   } else {
+       manager->themes = temp;
+       _themeInit(manager->themes + manager->count-1,
+                   getenv("XCURSOR_THEME"),
+                   px);
+       return manager->themes[manager->count-1].theme;
+   }
+}
+
+//WARNING: No input safety checks.
+static inline void _themeInc(_themeData
+                          *theme) {
+    ++(theme->refcount);
+}
+
+// WARNING: No input safety checks.
+// In particular, doesn't check if theme is actually managed by the manager.
+static void
+_themeDec(_themeData *theme, _wlCursorThemeManager *manager) {
+    if (--(theme->refcount) == 0) {
+        wl_cursor_theme_destroy(theme->theme);
+        if (--(manager->count) > 0) {
+            const _themeData *last_theme = (manager->themes)+(manager->count);
+            *theme = *last_theme;
+            _themeData *temp = realloc(manager->themes, (manager->count)*sizeof(_themeData));
+            // We're shrinking here, so it's not catastrophic if realloc fails.
+            if (temp) manager->themes = temp;
+        } else {
+            free(manager->themes);
+            manager->themes = NULL;
+        }
+    }
+}
+
+static _wlCursorThemeManager _default = {0};
+
+_wlCursorThemeManager*
+_wlCursorThemeManagerDefault() {
+    return &_default;
+}
+
+void
+_wlCursorThemeManagerDestroy(_wlCursorThemeManager *manager) {
+    if (manager) {
+        for (size_t i = 0; i < manager->count; ++i) {
+            wl_cursor_theme_destroy(manager->themes[i].theme);
+        }
+        free(manager->themes);
+    }
+}
+
+static struct wl_cursor_theme*
+_wlCursorThemeManagerGet(_wlCursorThemeManager *manager, int px) {
+    _themeData *themedata = NULL;
+    for (size_t i = 0; i < manager->count; ++i) {
+        _themeData *temp = manager->themes+i;
+        if (temp->px == px) {
+            themedata = temp;
+            break;
+        }
+    }
+    if (themedata != NULL) {
+        _themeInc(themedata);
+        return themedata->theme;
+    }
+    return _themeAdd(px, manager);
+}
+
+struct wl_cursor_theme*
+_wlCursorThemeManage(_wlCursorThemeManager *manager, struct wl_cursor_theme *theme, int px) {
+    //WARNING: Multiple returns.
+    if (manager == NULL) {
+        return NULL;
+    }
+    if (theme != NULL) {
+        // Search for the provided theme in the manager.
+        _themeData *themedata = NULL;
+        for (size_t i = 0; i < manager->count; ++i) {
+            _themeData *temp = manager->themes+i;
+            if (temp->theme == theme) {
+                themedata = temp;
+                break;
+            }
+        }
+        if (themedata != NULL) {
+            // Search succeeded. Check if we can avoid unnecessary operations.
+            if (themedata->px == px) return theme;
+            _themeDec(themedata, manager);
+        } else {
+            _glfwInputError(GLFW_PLATFORM_ERROR,
+                            "Wayland internal: managed theme isn't in the provided manager");
+            return theme;
+            //^ This is probably the sanest behavior for this situation: do nothing.
+        }
+    }
+    return px > 0 ? _wlCursorThemeManagerGet(manager, px) : NULL;
+}
+
+int
+_wlCursorPxFromScale(int scale) {
+    const char *envStr = getenv("XCURSOR_SIZE");
+    if(envStr != NULL) {
+        const int retval = atoi(envStr);
+        //^ atoi here is fine since 0 is an invalid value.
+        if(retval > 0 && retval <= INT_MAX/scale) {
+            return retval*scale;
+        }
+    }
+    return 32*scale;
+}

glfw/wl_cursors.h

@@ -0,0 +1,30 @@
+// Declarations for a HiDPI-aware cursor theme manager.
+
+#include <wayland-cursor.h>
+
+typedef struct _wlCursorThemeManager _wlCursorThemeManager;
+
+/** Returns a pointer to a wlCursorThemeManagerInstance.
+ * Repeatedly calling this function will return the same instance.
+ *
+ * The retrieved instance must be destroyed with _wlCursorThemeManagerDestroy.
+ */
+_wlCursorThemeManager* _wlCursorThemeManagerDefault(void);
+
+/** Set a wl_cursor_theme pointer variable to a pointer to a managed cursor theme.
+ * Pass the desired px as the third argument.
+ * Returns a pointer to a managed theme, or NULL if the desired px is 0 or an error occurs.
+ *
+ * The passed theme pointer must either be NULL or a pointer to a theme managed by the passed manager.
+ * The provided pointer may be invalidated if it's non-NULL.
+ */
+struct wl_cursor_theme*
+_wlCursorThemeManage(_wlCursorThemeManager*, struct wl_cursor_theme*, int);
+
+void _wlCursorThemeManagerDestroy(_wlCursorThemeManager*);
+
+/** Helper method to determine the appropriate size in pixels for a given scale.
+ *
+ * Reads XCURSOR_SIZE if it's set and is valid, else defaults to 32*scale.
+ */
+int _wlCursorPxFromScale(int);

glfw/wl_init.c

@@ -113,7 +113,7 @@ static void pointerHandleEnter(void* data UNUSED,
     }
 
     window->wl.decorations.focus = focus;
-    _glfw.wl.pointerSerial = serial;
+    _glfw.wl.serial = serial;
     _glfw.wl.pointerFocus = window;
 
     window->wl.hovered = true;
@@ -134,20 +134,26 @@ static void pointerHandleLeave(void* data UNUSED,
 
     window->wl.hovered = false;
 
-    _glfw.wl.pointerSerial = serial;
+    _glfw.wl.serial = serial;
     _glfw.wl.pointerFocus = NULL;
     _glfwInputCursorEnter(window, false);
     _glfw.wl.cursorPreviousShape = GLFW_INVALID_CURSOR;
 }
 
-static void setCursor(GLFWCursorShape shape)
+static void setCursor(GLFWCursorShape shape, _GLFWwindow* window)
 {
     struct wl_buffer* buffer;
     struct wl_cursor* cursor;
     struct wl_cursor_image* image;
     struct wl_surface* surface = _glfw.wl.cursorSurface;
+    const int scale = window->wl.scale;
 
-    cursor = _glfwLoadCursor(shape);
+    window->wl.cursorTheme = _wlCursorThemeManage(
+        _glfw.wl.cursorThemeManager,
+        window->wl.cursorTheme,
+        _wlCursorPxFromScale(scale)
+    ); 
+    cursor = _glfwLoadCursor(shape, window->wl.cursorTheme);
     if (!cursor) return;
     // TODO: handle animated cursors too.
     image = cursor->images[0];
@@ -158,10 +164,11 @@ static void setCursor(GLFWCursorShape shape)
     buffer = wl_cursor_image_get_buffer(image);
     if (!buffer)
         return;
-    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial,
+    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.serial,
                           surface,
-                          image->hotspot_x,
-                          image->hotspot_y);
+                          image->hotspot_x / scale,
+                          image->hotspot_y / scale);
+    wl_surface_set_buffer_scale(surface, scale);
     wl_surface_attach(surface, buffer, 0, 0);
     wl_surface_damage(surface, 0, 0,
                       image->width, image->height);
@@ -225,7 +232,7 @@ static void pointerHandleMotion(void* data UNUSED,
             assert(0);
     }
     if (_glfw.wl.cursorPreviousShape != cursorShape)
-        setCursor(cursorShape);
+        setCursor(cursorShape, window);
 }
 
 static void pointerHandleButton(void* data UNUSED,
@@ -301,7 +308,7 @@ static void pointerHandleButton(void* data UNUSED,
     if (window->wl.decorations.focus != mainWindow)
         return;
 
-    _glfw.wl.pointerSerial = serial;
+    _glfw.wl.serial = serial;
 
     /* Makes left, right and middle 0, 1 and 2. Overall order follows evdev
      * codes. */
@@ -334,7 +341,7 @@ static void pointerHandleAxis(void* data UNUSED,
     else if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
         y = wl_fixed_to_double(value) * -1;
 
-    _glfwInputScroll(window, x, y, 1);
+    _glfwInputScroll(window, x, y, 1, _glfw.wl.xkb.states.modifiers);
 }
 
 static const struct wl_pointer_listener pointerListener = {
@@ -372,7 +379,7 @@ static void keyboardHandleKeymap(void* data UNUSED,
 
 static void keyboardHandleEnter(void* data UNUSED,
                                 struct wl_keyboard* keyboard UNUSED,
-                                uint32_t serial UNUSED,
+                                uint32_t serial,
                                 struct wl_surface* surface,
                                 struct wl_array* keys)
 {
@@ -388,6 +395,7 @@ static void keyboardHandleEnter(void* data UNUSED,
             return;
     }
 
+    _glfw.wl.serial = serial;
     _glfw.wl.keyboardFocus = window;
     _glfwInputWindowFocus(window, true);
     uint32_t* key;
@@ -403,7 +411,7 @@ static void keyboardHandleEnter(void* data UNUSED,
 
 static void keyboardHandleLeave(void* data UNUSED,
                                 struct wl_keyboard* keyboard UNUSED,
-                                uint32_t serial UNUSED,
+                                uint32_t serial,
                                 struct wl_surface* surface UNUSED)
 {
     _GLFWwindow* window = _glfw.wl.keyboardFocus;
@@ -411,6 +419,7 @@ static void keyboardHandleLeave(void* data UNUSED,
     if (!window)
         return;
 
+    _glfw.wl.serial = serial;
     _glfw.wl.keyboardFocus = NULL;
     _glfwInputWindowFocus(window, false);
     toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.keyRepeatInfo.keyRepeatTimer, 0);
@@ -427,7 +436,7 @@ dispatchPendingKeyRepeats(id_type timer_id UNUSED, void *data UNUSED) {
 
 static void keyboardHandleKey(void* data UNUSED,
                               struct wl_keyboard* keyboard UNUSED,
-                              uint32_t serial UNUSED,
+                              uint32_t serial,
                               uint32_t time UNUSED,
                               uint32_t key,
                               uint32_t state)
@@ -436,6 +445,8 @@ static void keyboardHandleKey(void* data UNUSED,
     if (!window)
         return;
     int action = state == WL_KEYBOARD_KEY_STATE_PRESSED ? GLFW_PRESS : GLFW_RELEASE;
+
+    _glfw.wl.serial = serial;
     glfw_xkb_handle_key_event(window, &_glfw.wl.xkb, key, action);
     bool repeatable = false;
     _glfw.wl.keyRepeatInfo.key = 0;
@@ -454,12 +465,13 @@ static void keyboardHandleKey(void* data UNUSED,
 
 static void keyboardHandleModifiers(void* data UNUSED,
                                     struct wl_keyboard* keyboard UNUSED,
-                                    uint32_t serial UNUSED,
+                                    uint32_t serial,
                                     uint32_t modsDepressed,
                                     uint32_t modsLatched,
                                     uint32_t modsLocked,
                                     uint32_t group)
 {
+    _glfw.wl.serial = serial;
     glfw_xkb_update_modifiers(&_glfw.wl.xkb, modsDepressed, modsLatched, modsLocked, 0, 0, group);
 }
 
@@ -775,26 +787,14 @@ int _glfwPlatformInit(void)
 
     if (_glfw.wl.shm)
     {
-        const char *cursorTheme = getenv("XCURSOR_THEME"), *cursorSizeStr = getenv("XCURSOR_SIZE");
-        char *cursorSizeEnd;
-        int cursorSize = 32;
-        if (cursorSizeStr)
-        {
-            errno = 0;
-            long cursorSizeLong = strtol(cursorSizeStr, &cursorSizeEnd, 10);
-            if (!*cursorSizeEnd && !errno && cursorSizeLong > 0 && cursorSizeLong <= INT_MAX)
-                cursorSize = (int)cursorSizeLong;
-        }
-        _glfw.wl.cursorTheme = wl_cursor_theme_load(cursorTheme, cursorSize, _glfw.wl.shm);
-        if (!_glfw.wl.cursorTheme)
-        {
-            _glfwInputError(GLFW_PLATFORM_ERROR,
-                            "Wayland: Unable to load default cursor theme");
-            return false;
-        }
-        _glfw.wl.cursorSurface =
+        _glfw.wl.cursorThemeManager = _wlCursorThemeManagerDefault();
+        _glfw.wl.cursorSurface = 
             wl_compositor_create_surface(_glfw.wl.compositor);
     }
+    else
+    {
+        _glfw.wl.cursorThemeManager = NULL;
+    }
 
     return true;
 }
@@ -814,8 +814,6 @@ void _glfwPlatformTerminate(void)
     glfw_xkb_release(&_glfw.wl.xkb);
     glfw_dbus_terminate(&_glfw.wl.dbus);
 
-    if (_glfw.wl.cursorTheme)
-        wl_cursor_theme_destroy(_glfw.wl.cursorTheme);
     if (_glfw.wl.cursor.handle)
     {
         _glfw_dlclose(_glfw.wl.cursor.handle);
@@ -824,6 +822,9 @@ void _glfwPlatformTerminate(void)
 
     if (_glfw.wl.cursorSurface)
         wl_surface_destroy(_glfw.wl.cursorSurface);
+    if (_glfw.wl.cursorThemeManager) {
+        _wlCursorThemeManagerDestroy(_glfw.wl.cursorThemeManager);
+    }
     if (_glfw.wl.subcompositor)
         wl_subcompositor_destroy(_glfw.wl.subcompositor);
     if (_glfw.wl.compositor)

glfw/wl_monitor.c

@@ -202,7 +202,7 @@ void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
 
 bool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor UNUSED, GLFWgammaramp* ramp UNUSED)
 {
-    _glfwInputError(GLFW_PLATFORM_ERROR,
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
                     "Wayland: Gamma ramp access is not available");
     return false;
 }
@@ -210,7 +210,7 @@ bool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor UNUSED, GLFWgammaramp* ramp
 void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor UNUSED,
                                const GLFWgammaramp* ramp UNUSED)
 {
-    _glfwInputError(GLFW_PLATFORM_ERROR,
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
                     "Wayland: Gamma ramp access is not available");
 }
 

glfw/wl_platform.h

@@ -52,6 +52,7 @@ typedef VkBool32 (APIENTRY *PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR
 #include "xkb_glfw.h"
 #include "egl_context.h"
 #include "osmesa_context.h"
+#include "wl_cursors.h"
 
 #include "wayland-xdg-shell-client-protocol.h"
 #include "wayland-viewporter-client-protocol.h"
@@ -76,18 +77,6 @@ typedef VkBool32 (APIENTRY *PFN_vkGetPhysicalDeviceWaylandPresentationSupportKHR
 #define _GLFW_PLATFORM_CONTEXT_STATE
 #define _GLFW_PLATFORM_LIBRARY_CONTEXT_STATE
 
-struct wl_cursor_image {
-    uint32_t width;
-    uint32_t height;
-    uint32_t hotspot_x;
-    uint32_t hotspot_y;
-    uint32_t delay;
-};
-struct wl_cursor {
-    unsigned int image_count;
-    struct wl_cursor_image** images;
-    char* name;
-};
 typedef struct wl_cursor_theme* (* PFN_wl_cursor_theme_load)(const char*, int, struct wl_shm*);
 typedef void (* PFN_wl_cursor_theme_destroy)(struct wl_cursor_theme*);
 typedef struct wl_cursor* (* PFN_wl_cursor_theme_get_cursor)(struct wl_cursor_theme*, const char*);
@@ -148,6 +137,7 @@ typedef struct _GLFWwindowWayland
 
     _GLFWcursor*                currentCursor;
     double                      cursorPosX, cursorPosY;
+    struct wl_cursor_theme*     cursorTheme;
 
     char*                       title;
     char                        appId[256];
@@ -236,10 +226,9 @@ typedef struct _GLFWlibraryWayland
     int                         compositorVersion;
     int                         seatVersion;
 
-    struct wl_cursor_theme*     cursorTheme;
     struct wl_surface*          cursorSurface;
     GLFWCursorShape             cursorPreviousShape;
-    uint32_t                    pointerSerial;
+    uint32_t                    serial;
 
     int32_t                     keyboardRepeatRate;
     monotonic_t                 keyboardRepeatDelay;
@@ -278,6 +267,8 @@ typedef struct _GLFWlibraryWayland
     size_t dataOffersCounter;
     _GLFWWaylandDataOffer dataOffers[8];
     char* primarySelectionString;
+
+    _wlCursorThemeManager*      cursorThemeManager;
 } _GLFWlibraryWayland;
 
 // Wayland-specific per-monitor data
@@ -291,8 +282,7 @@ typedef struct _GLFWmonitorWayland
     int                         x;
     int                         y;
     int                         scale;
-
-} _GLFWmonitorWayland;
+ } _GLFWmonitorWayland;
 
 // Wayland-specific per-cursor data
 //
@@ -303,6 +293,10 @@ typedef struct _GLFWcursorWayland
     int                         width, height;
     int                         xhot, yhot;
     int                         currentImage;
+    /** The scale of the cursor, or 0 if the cursor should be loaded late, or -1 if the cursor variable itself is unused. */
+    int                         scale;
+    /** Cursor shape stored to allow late cursor loading in setCursorImage. */
+    GLFWCursorShape             shape;
 } _GLFWcursorWayland;
 
 
@@ -310,5 +304,5 @@ void _glfwAddOutputWayland(uint32_t name, uint32_t version);
 void _glfwSetupWaylandDataDevice(void);
 void _glfwSetupWaylandPrimarySelectionDevice(void);
 void animateCursorImage(id_type timer_id, void *data);
-struct wl_cursor* _glfwLoadCursor(GLFWCursorShape);
+struct wl_cursor* _glfwLoadCursor(GLFWCursorShape, struct wl_cursor_theme*);
 void destroy_data_offer(_GLFWWaylandDataOffer*);

glfw/wl_window.c

@@ -41,8 +41,67 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 
+static void
+load_cursor_theme(_GLFWwindow* window) {
+    window->wl.cursorTheme = _wlCursorThemeManage(
+        _glfw.wl.cursorThemeManager, window->wl.cursorTheme, _wlCursorPxFromScale(window->wl.scale));
+}
 
+static void
+setCursorImage(_GLFWwindow* window)
+{
+    _GLFWcursorWayland defaultCursor = {.shape = GLFW_ARROW_CURSOR};
+    _GLFWcursorWayland* cursorWayland = window->cursor ? &window->cursor->wl : &defaultCursor;
+    struct wl_cursor_image* image = NULL;
+    struct wl_buffer* buffer = NULL;
+    struct wl_surface* surface = _glfw.wl.cursorSurface;
+    const int scale = window->wl.scale;
 
+    if (cursorWayland->scale < 0) {
+        buffer = cursorWayland->buffer;
+        toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, 0);
+    } else
+    {
+        if (cursorWayland->scale != scale) {
+            if (!window->wl.cursorTheme) load_cursor_theme(window);
+            struct wl_cursor *newCursor = _glfwLoadCursor(cursorWayland->shape, window->wl.cursorTheme);
+            if (newCursor != NULL) {
+                cursorWayland->cursor = newCursor;
+                cursorWayland->scale = scale;
+            } else {
+                _glfwInputError(GLFW_PLATFORM_ERROR, "Wayland: late cursor load failed; proceeding with existing cursor");
+            }
+        }
+        if (!cursorWayland->cursor)
+            return;
+        image = cursorWayland->cursor->images[cursorWayland->currentImage];
+        buffer = wl_cursor_image_get_buffer(image);
+        if (image->delay && window->cursor) {
+            changeTimerInterval(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, ms_to_monotonic_t(image->delay));
+            toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, 1);
+        } else {
+            toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, 0);
+        }
+
+        if (!buffer)
+            return;
+
+        cursorWayland->width = image->width;
+        cursorWayland->height = image->height;
+        cursorWayland->xhot = image->hotspot_x;
+        cursorWayland->yhot = image->hotspot_y;
+    }
+
+    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.serial,
+                          surface,
+                          cursorWayland->xhot / scale,
+                          cursorWayland->yhot / scale);
+    wl_surface_set_buffer_scale(surface, scale);
+    wl_surface_attach(surface, buffer, 0, 0);
+    wl_surface_damage(surface, 0, 0,
+                      cursorWayland->width, cursorWayland->height);
+    wl_surface_commit(surface);
+}
 
 
 static bool checkScaleChange(_GLFWwindow* window)
@@ -73,6 +132,8 @@ static bool checkScaleChange(_GLFWwindow* window)
     {
         window->wl.scale = scale;
         wl_surface_set_buffer_scale(window->wl.surface, scale);
+        load_cursor_theme(window);
+        setCursorImage(window);
         return true;
     }
     if (window->wl.monitorsCount > 0 && !window->wl.initial_scale_notified) {
@@ -388,9 +449,9 @@ static const struct zxdg_toplevel_decoration_v1_listener xdgDecorationListener =
     xdgDecorationHandleConfigure,
 };
 
-static void handleEnter(void *data,
-                        struct wl_surface *surface UNUSED,
-                        struct wl_output *output)
+static void surfaceHandleEnter(void *data,
+                               struct wl_surface *surface UNUSED,
+                               struct wl_output *output)
 {
     _GLFWwindow* window = data;
     _GLFWmonitor* monitor = wl_output_get_user_data(output);
@@ -411,9 +472,9 @@ static void handleEnter(void *data,
     }
 }
 
-static void handleLeave(void *data,
-                        struct wl_surface *surface UNUSED,
-                        struct wl_output *output)
+static void surfaceHandleLeave(void *data,
+                               struct wl_surface *surface UNUSED,
+                               struct wl_output *output)
 {
     _GLFWwindow* window = data;
     _GLFWmonitor* monitor = wl_output_get_user_data(output);
@@ -436,8 +497,8 @@ static void handleLeave(void *data,
 }
 
 static const struct wl_surface_listener surfaceListener = {
-    handleEnter,
-    handleLeave
+    surfaceHandleEnter,
+    surfaceHandleLeave
 };
 
 static void setIdleInhibitor(_GLFWwindow* window, bool enable)
@@ -679,56 +740,16 @@ static bool createXdgSurface(_GLFWwindow* window)
     return true;
 }
 
-static void
-setCursorImage(_GLFWcursorWayland* cursorWayland)
-{
-    struct wl_cursor_image* image;
-    struct wl_buffer* buffer;
-    struct wl_surface* surface = _glfw.wl.cursorSurface;
-
-    if (!cursorWayland->cursor) {
-        buffer = cursorWayland->buffer;
-        toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, 0);
-    } else
-    {
-        image = cursorWayland->cursor->images[cursorWayland->currentImage];
-        buffer = wl_cursor_image_get_buffer(image);
-        if (image->delay) {
-            changeTimerInterval(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, ms_to_monotonic_t(image->delay));
-            toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, 1);
-        } else {
-            toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, 0);
-        }
-
-        if (!buffer)
-            return;
-
-        cursorWayland->width = image->width;
-        cursorWayland->height = image->height;
-        cursorWayland->xhot = image->hotspot_x;
-        cursorWayland->yhot = image->hotspot_y;
-    }
-
-    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial,
-                          surface,
-                          cursorWayland->xhot,
-                          cursorWayland->yhot);
-    wl_surface_attach(surface, buffer, 0, 0);
-    wl_surface_damage(surface, 0, 0,
-                      cursorWayland->width, cursorWayland->height);
-    wl_surface_commit(surface);
-}
-
 static void
 incrementCursorImage(_GLFWwindow* window)
 {
-    if (window && window->wl.decorations.focus == mainWindow) {
+    if (window && window->wl.decorations.focus == mainWindow && window->cursorMode != GLFW_CURSOR_HIDDEN) {
         _GLFWcursor* cursor = window->wl.currentCursor;
         if (cursor && cursor->wl.cursor)
         {
             cursor->wl.currentImage += 1;
             cursor->wl.currentImage %= cursor->wl.cursor->image_count;
-            setCursorImage(&cursor->wl);
+            setCursorImage(window);
             toggleTimer(&_glfw.wl.eventLoopData, _glfw.wl.cursorAnimationTimer, cursor->wl.cursor->image_count > 1);
             return;
         }
@@ -744,11 +765,14 @@ animateCursorImage(id_type timer_id UNUSED, void *data UNUSED) {
 static void
 abortOnFatalError(int last_error) {
     _glfwInputError(GLFW_PLATFORM_ERROR, "Wayland: fatal display error: %s", strerror(last_error));
-    _GLFWwindow* window = _glfw.windowListHead;
-    while (window)
-    {
-        _glfwInputWindowCloseRequest(window);
-        window = window->next;
+    if (_glfw.callbacks.application_close) _glfw.callbacks.application_close(1);
+    else {
+        _GLFWwindow* window = _glfw.windowListHead;
+        while (window)
+        {
+            _glfwInputWindowCloseRequest(window);
+            window = window->next;
+        }
     }
     // ensure the tick callback is called
     _glfw.wl.eventLoopData.wakeup_data_read = true;
@@ -804,24 +828,25 @@ handleEvents(monotonic_t timeout)
 }
 
 static struct wl_cursor*
-try_cursor_names(int arg_count, ...) {
+try_cursor_names(struct wl_cursor_theme* theme, int arg_count, ...) {
     struct wl_cursor* ans = NULL;
     va_list ap;
     va_start(ap, arg_count);
     for (int i = 0; i < arg_count && !ans; i++) {
         const char *name = va_arg(ap, const char *);
-        ans = wl_cursor_theme_get_cursor(_glfw.wl.cursorTheme, name);
+        ans = wl_cursor_theme_get_cursor(theme, name);
     }
     va_end(ap);
     return ans;
 }
 
-struct wl_cursor* _glfwLoadCursor(GLFWCursorShape shape)
+struct wl_cursor* _glfwLoadCursor(GLFWCursorShape shape, struct wl_cursor_theme* theme)
 {
     static bool warnings[GLFW_INVALID_CURSOR] = {0};
+    if (!theme) return NULL;
 #define NUMARGS(...)  (sizeof((const char*[]){__VA_ARGS__})/sizeof(const char*))
 #define C(name, ...) case name: { \
-    ans = try_cursor_names(NUMARGS(__VA_ARGS__), __VA_ARGS__); \
+    ans = try_cursor_names(theme, NUMARGS(__VA_ARGS__), __VA_ARGS__); \
     if (!ans && !warnings[name]) {\
         _glfwInputError(GLFW_PLATFORM_ERROR, "Wayland: Could not find standard cursor: %s", #name); \
         warnings[name] = true; \
@@ -831,7 +856,7 @@ struct wl_cursor* _glfwLoadCursor(GLFWCursorShape shape)
     struct wl_cursor* ans = NULL;
     switch (shape)
     {
-        C(GLFW_ARROW_CURSOR, "arrow", "left_ptr", "default")
+        C(GLFW_ARROW_CURSOR, "left_ptr", "arrow", "default")
         C(GLFW_IBEAM_CURSOR, "xterm", "ibeam", "text")
         C(GLFW_CROSSHAIR_CURSOR, "crosshair", "cross")
         C(GLFW_HAND_CURSOR, "hand2", "grab", "grabbing", "closedhand")
@@ -901,6 +926,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
     }
 
     window->wl.currentCursor = NULL;
+    // Don't set window->wl.cursorTheme to NULL here.
 
     window->wl.monitors = calloc(1, sizeof(_GLFWmonitor*));
     window->wl.monitorsCount = 0;
@@ -911,6 +937,12 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
 
 void _glfwPlatformDestroyWindow(_GLFWwindow* window)
 {
+    if (window->wl.cursorTheme) {
+        _wlCursorThemeManage(_glfw.wl.cursorThemeManager,
+                             window->wl.cursorTheme,
+                             0);
+        window->wl.cursorTheme = NULL;
+    }
     if (window == _glfw.wl.pointerFocus)
     {
         _glfw.wl.pointerFocus = NULL;
@@ -929,6 +961,7 @@ void _glfwPlatformDestroyWindow(_GLFWwindow* window)
         window->context.destroy(window);
 
     destroyDecorations(window);
+
     if (window->wl.xdg.decoration)
         zxdg_toplevel_decoration_v1_destroy(window->wl.xdg.decoration);
 
@@ -957,12 +990,10 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
 {
     if (window->wl.title)
         free(window->wl.title);
-    window->wl.title = _glfw_strdup(title);
     // Wayland cannot handle requests larger than ~8200 bytes. Sending
     // one causes an abort(). Since titles this large are meaningless anyway
-    // ensure they do not happen. One should really truncate ensuring valid UTF-8
-    // but I cant be bothered.
-    if (title && strnlen(title, 2048) >= 2048) window->wl.title[2048] = 0;
+    // ensure they do not happen.
+    window->wl.title = utf_8_strndup(title, 2048);
     if (window->wl.xdg.toplevel)
         xdg_toplevel_set_title(window->wl.xdg.toplevel, window->wl.title);
 }
@@ -970,8 +1001,8 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
 void _glfwPlatformSetWindowIcon(_GLFWwindow* window UNUSED,
                                 int count UNUSED, const GLFWimage* images UNUSED)
 {
-    _glfwInputError(GLFW_PLATFORM_ERROR,
-                    "Wayland: Setting window icon not supported");
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
+                    "Wayland: The platform does not support setting the window icon");
 }
 
 void _glfwPlatformGetWindowPos(_GLFWwindow* window UNUSED, int* xpos UNUSED, int* ypos UNUSED)
@@ -979,16 +1010,16 @@ void _glfwPlatformGetWindowPos(_GLFWwindow* window UNUSED, int* xpos UNUSED, int
     // A Wayland client is not aware of its position, so just warn and leave it
     // as (0, 0)
 
-    _glfwInputError(GLFW_PLATFORM_ERROR,
-                    "Wayland: Window position retrieval not supported");
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
+                    "Wayland: The platform does not provide the window position");
 }
 
 void _glfwPlatformSetWindowPos(_GLFWwindow* window UNUSED, int xpos UNUSED, int ypos UNUSED)
 {
     // A Wayland client can not set its position, so just warn
 
-    _glfwInputError(GLFW_PLATFORM_ERROR,
-                    "Wayland: Window position setting not supported");
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
+                    "Wayland: The platform does not support setting the window position");
 }
 
 void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
@@ -1029,6 +1060,8 @@ void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window UNUSED,
 {
     // TODO: find out how to trigger a resize.
     // The actual limits are checked in the xdg_toplevel::configure handler.
+    _glfwInputError(GLFW_FEATURE_UNIMPLEMENTED,
+                    "Wayland: Window aspect ratio not yet implemented");
 }
 
 void _glfwPlatformSetWindowSizeIncrements(_GLFWwindow* window UNUSED,
@@ -1133,7 +1166,7 @@ void _glfwPlatformRequestWindowAttention(_GLFWwindow* window UNUSED)
     // TODO
     static bool notified = false;
     if (!notified) {
-        _glfwInputError(GLFW_PLATFORM_ERROR,
+        _glfwInputError(GLFW_FEATURE_UNIMPLEMENTED,
                         "Wayland: Window attention request not implemented yet");
         notified = true;
     }
@@ -1154,8 +1187,8 @@ int _glfwPlatformWindowBell(_GLFWwindow* window UNUSED)
 
 void _glfwPlatformFocusWindow(_GLFWwindow* window UNUSED)
 {
-    _glfwInputError(GLFW_PLATFORM_ERROR,
-                    "Wayland: Focusing a window requires user interaction");
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
+                    "Wayland: The platform does not support setting the input focus");
 }
 
 void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
@@ -1208,7 +1241,7 @@ int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
 void _glfwPlatformSetWindowResizable(_GLFWwindow* window UNUSED, bool enabled UNUSED)
 {
     // TODO
-    _glfwInputError(GLFW_PLATFORM_ERROR,
+    _glfwInputError(GLFW_FEATURE_UNIMPLEMENTED,
                     "Wayland: Window attribute setting not implemented yet");
 }
 
@@ -1226,7 +1259,7 @@ void _glfwPlatformSetWindowDecorated(_GLFWwindow* window, bool enabled)
 void _glfwPlatformSetWindowFloating(_GLFWwindow* window UNUSED, bool enabled UNUSED)
 {
     // TODO
-    _glfwInputError(GLFW_PLATFORM_ERROR,
+    _glfwInputError(GLFW_FEATURE_UNIMPLEMENTED,
                     "Wayland: Window attribute setting not implemented yet");
 }
 
@@ -1237,6 +1270,18 @@ float _glfwPlatformGetWindowOpacity(_GLFWwindow* window UNUSED)
 
 void _glfwPlatformSetWindowOpacity(_GLFWwindow* window UNUSED, float opacity UNUSED)
 {
+    _glfwInputError(GLFW_FEATURE_UNAVAILABLE,
+                    "Wayland: The platform does not support setting the window opacity");
+}
+
+void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window UNUSED, bool enabled UNUSED)
+{
+    // This is handled in relativePointerHandleRelativeMotion
+}
+
+bool _glfwPlatformRawMouseMotionSupported(void)
+{
+    return true;
 }
 
 void _glfwPlatformPollEvents(void)
@@ -1309,17 +1354,19 @@ int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
     cursor->wl.height = image->height;
     cursor->wl.xhot = xhot;
     cursor->wl.yhot = yhot;
+    cursor->wl.scale = -1;
+    cursor->wl.shape = GLFW_INVALID_CURSOR;
     return true;
 }
 
 int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, GLFWCursorShape shape)
 {
-    struct wl_cursor* standardCursor;
-
-    standardCursor = _glfwLoadCursor(shape);
-    if (!standardCursor) return false;
-    cursor->wl.cursor = standardCursor;
+    // Don't actually load the cursor at this point,
+    // because there's not enough info to be properly HiDPI aware.
+    cursor->wl.cursor = NULL;
     cursor->wl.currentImage = 0;
+    cursor->wl.scale = 0;
+    cursor->wl.shape = shape;
     return true;
 }
 
@@ -1333,31 +1380,42 @@ void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
         wl_buffer_destroy(cursor->wl.buffer);
 }
 
-static void handleRelativeMotion(void* data,
-                                 struct zwp_relative_pointer_v1* pointer UNUSED,
-                                 uint32_t timeHi UNUSED,
-                                 uint32_t timeLo UNUSED,
-                                 wl_fixed_t dx UNUSED,
-                                 wl_fixed_t dy UNUSED,
-                                 wl_fixed_t dxUnaccel,
-                                 wl_fixed_t dyUnaccel)
+static void relativePointerHandleRelativeMotion(void* data,
+                                                struct zwp_relative_pointer_v1* pointer UNUSED,
+                                                uint32_t timeHi UNUSED,
+                                                uint32_t timeLo UNUSED,
+                                                wl_fixed_t dx,
+                                                wl_fixed_t dy,
+                                                wl_fixed_t dxUnaccel,
+                                                wl_fixed_t dyUnaccel)
 {
     _GLFWwindow* window = data;
+    double xpos = window->virtualCursorPosX;
+    double ypos = window->virtualCursorPosY;
 
     if (window->cursorMode != GLFW_CURSOR_DISABLED)
         return;
 
-    _glfwInputCursorPos(window,
-                        window->virtualCursorPosX + wl_fixed_to_double(dxUnaccel),
-                        window->virtualCursorPosY + wl_fixed_to_double(dyUnaccel));
+    if (window->rawMouseMotion)
+    {
+        xpos += wl_fixed_to_double(dxUnaccel);
+        ypos += wl_fixed_to_double(dyUnaccel);
+    }
+    else
+    {
+        xpos += wl_fixed_to_double(dx);
+        ypos += wl_fixed_to_double(dy);
+    }
+
+    _glfwInputCursorPos(window, xpos, ypos);
 }
 
 static const struct zwp_relative_pointer_v1_listener relativePointerListener = {
-    handleRelativeMotion
+    relativePointerHandleRelativeMotion
 };
 
-static void handleLocked(void* data UNUSED,
-                         struct zwp_locked_pointer_v1* lockedPointer UNUSED)
+static void lockedPointerHandleLocked(void* data UNUSED,
+                                      struct zwp_locked_pointer_v1* lockedPointer UNUSED)
 {
 }
 
@@ -1377,14 +1435,14 @@ static void unlockPointer(_GLFWwindow* window)
 
 static void lockPointer(_GLFWwindow* window UNUSED);
 
-static void handleUnlocked(void* data UNUSED,
-                           struct zwp_locked_pointer_v1* lockedPointer UNUSED)
+static void lockedPointerHandleUnlocked(void* data UNUSED,
+                                        struct zwp_locked_pointer_v1* lockedPointer UNUSED)
 {
 }
 
 static const struct zwp_locked_pointer_v1_listener lockedPointerListener = {
-    handleLocked,
-    handleUnlocked
+    lockedPointerHandleLocked,
+    lockedPointerHandleUnlocked
 };
 
 static void lockPointer(_GLFWwindow* window)
@@ -1421,7 +1479,7 @@ static void lockPointer(_GLFWwindow* window)
     window->wl.pointerLock.relativePointer = relativePointer;
     window->wl.pointerLock.lockedPointer = lockedPointer;
 
-    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial,
+    wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.serial,
                           NULL, 0, 0);
 }
 
@@ -1432,8 +1490,6 @@ static bool isPointerLocked(_GLFWwindow* window)
 
 void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
 {
-    struct wl_cursor* defaultCursor;
-
     if (!_glfw.wl.pointer)
         return;
 
@@ -1450,21 +1506,7 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
 
     if (window->cursorMode == GLFW_CURSOR_NORMAL)
     {
-        if (cursor)
-            setCursorImage(&cursor->wl);
-        else
-        {
-            defaultCursor = _glfwLoadCursor(GLFW_ARROW_CURSOR);
-            if (!defaultCursor) return;
-            _GLFWcursorWayland cursorWayland = {
-                defaultCursor,
-                NULL,
-                0, 0,
-                0, 0,
-                0
-            };
-            setCursorImage(&cursorWayland);
-        }
+        setCursorImage(window);
     }
     else if (window->cursorMode == GLFW_CURSOR_DISABLED)
     {
@@ -1473,8 +1515,7 @@ void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
     }
     else if (window->cursorMode == GLFW_CURSOR_HIDDEN)
     {
-        wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.pointerSerial,
-                              NULL, 0, 0);
+        wl_pointer_set_cursor(_glfw.wl.pointer, _glfw.wl.serial, NULL, 0, 0);
     }
 }
 

glfw/x11_init.c

@@ -42,11 +42,11 @@
 #include <unistd.h>
 
 
-// Check whether the specified atom is supported
+// Return the atom ID only if it is listed in the specified array
 //
-static Atom getSupportedAtom(Atom* supportedAtoms,
-                             unsigned long atomCount,
-                             const char* atomName)
+static Atom getAtomIfSupported(Atom* supportedAtoms,
+                               unsigned long atomCount,
+                               const char* atomName)
 {
     const Atom atom = XInternAtom(_glfw.x11.display, atomName, False);
 
@@ -64,9 +64,8 @@ static Atom getSupportedAtom(Atom* supportedAtoms,
 static void detectEWMH(void)
 {
     // First we read the _NET_SUPPORTING_WM_CHECK property on the root window
-    Window* windowFromRoot = NULL;
 
-    // Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
+    Window* windowFromRoot = NULL;
     if (!_glfwGetWindowPropertyX11(_glfw.x11.root,
                                    _glfw.x11.NET_SUPPORTING_WM_CHECK,
                                    XA_WINDOW,
@@ -93,6 +92,7 @@ static void detectEWMH(void)
     _glfwReleaseErrorHandlerX11();
 
     // If the property exists, it should contain the XID of the window
+
     if (*windowFromRoot != *windowFromChild)
     {
         XFree(windowFromRoot);
@@ -103,49 +103,50 @@ static void detectEWMH(void)
     XFree(windowFromRoot);
     XFree(windowFromChild);
 
-    // We are now fairly sure that an EWMH-compliant window manager is running
+    // We are now fairly sure that an EWMH-compliant WM is currently running
     // We can now start querying the WM about what features it supports by
     // looking in the _NET_SUPPORTED property on the root window
     // It should contain a list of supported EWMH protocol and state atoms
 
     Atom* supportedAtoms = NULL;
-    const unsigned long atomCount = _glfwGetWindowPropertyX11(_glfw.x11.root,
-                                          _glfw.x11.NET_SUPPORTED,
-                                          XA_ATOM,
-                                          (unsigned char**) &supportedAtoms);
+    const unsigned long atomCount =
+        _glfwGetWindowPropertyX11(_glfw.x11.root,
+                                  _glfw.x11.NET_SUPPORTED,
+                                  XA_ATOM,
+                                  (unsigned char**) &supportedAtoms);
     if (!supportedAtoms)
         return;
 
     // See which of the atoms we support that are supported by the WM
 
     _glfw.x11.NET_WM_STATE =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE");
     _glfw.x11.NET_WM_STATE_ABOVE =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
     _glfw.x11.NET_WM_STATE_FULLSCREEN =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
     _glfw.x11.NET_WM_STATE_MAXIMIZED_VERT =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_VERT");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_VERT");
     _glfw.x11.NET_WM_STATE_MAXIMIZED_HORZ =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_HORZ");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_MAXIMIZED_HORZ");
     _glfw.x11.NET_WM_STATE_DEMANDS_ATTENTION =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_DEMANDS_ATTENTION");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_STATE_DEMANDS_ATTENTION");
     _glfw.x11.NET_WM_FULLSCREEN_MONITORS =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
     _glfw.x11.NET_WM_WINDOW_TYPE =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE");
     _glfw.x11.NET_WM_WINDOW_TYPE_NORMAL =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE_NORMAL");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WM_WINDOW_TYPE_NORMAL");
     _glfw.x11.NET_WORKAREA =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_WORKAREA");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_WORKAREA");
     _glfw.x11.NET_CURRENT_DESKTOP =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_CURRENT_DESKTOP");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_CURRENT_DESKTOP");
     _glfw.x11.NET_ACTIVE_WINDOW =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
     _glfw.x11.NET_FRAME_EXTENTS =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
     _glfw.x11.NET_REQUEST_FRAME_EXTENTS =
-        getSupportedAtom(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");
+        getAtomIfSupported(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");
 
     XFree(supportedAtoms);
 }
@@ -502,8 +503,11 @@ static Window createHelperWindow(void)
 
 // X error handler
 //
-static int errorHandler(Display *display UNUSED, XErrorEvent* event)
+static int errorHandler(Display *display, XErrorEvent* event)
 {
+    if (_glfw.x11.display != display)
+        return 0;
+
     _glfw.x11.errorCode = event->error_code;
     return 0;
 }

glfw/x11_monitor.c

@@ -241,7 +241,8 @@ void _glfwSetVideoModeX11(_GLFWmonitor* monitor, const GLFWvidmode* desired)
         if (_glfwCompareVideoModes(&current, best) == 0)
             return;
 
-        XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
+        XRRScreenResources* sr =
+            XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
         XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
 
@@ -289,7 +290,8 @@ void _glfwRestoreVideoModeX11(_GLFWmonitor* monitor)
         if (monitor->x11.oldMode == None)
             return;
 
-        XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
+        XRRScreenResources* sr =
+            XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
 
         XRRSetCrtcConfig(_glfw.x11.display,
@@ -321,9 +323,10 @@ void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
 {
     if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
     {
-
-        XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
+        XRRScreenResources* sr =
+            XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
+
         if (ci)
         {
             if (xpos)
@@ -333,6 +336,7 @@ void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
 
             XRRFreeCrtcInfo(ci);
         }
+
         XRRFreeScreenResources(sr);
     }
 }
@@ -352,8 +356,8 @@ void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos
 
     if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
     {
-
-        XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
+        XRRScreenResources* sr =
+            XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
 
         areaX = ci->x;
@@ -446,7 +450,8 @@ GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count)
 
     if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
     {
-        XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
+        XRRScreenResources* sr =
+            XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
         XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
 
@@ -493,17 +498,19 @@ void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
 {
     if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
     {
-
-        XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
+        XRRScreenResources* sr =
+            XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
 
-        if (ci) {
+        if (ci)
+        {
             const XRRModeInfo* mi = getModeInfo(sr, ci->mode);
             if (mi)  // mi can be NULL if the monitor has been disconnected
                 *mode = vidmodeFromModeInfo(mi, ci);
 
             XRRFreeCrtcInfo(ci);
         }
+
         XRRFreeScreenResources(sr);
     }
     else

glfw/x11_window.c

@@ -455,22 +455,41 @@ static void updateCursorImage(_GLFWwindow* window)
     }
 }
 
+// Enable XI2 raw mouse motion events
+//
+static void enableRawMouseMotion(_GLFWwindow* window UNUSED)
+{
+    XIEventMask em;
+    unsigned char mask[XIMaskLen(XI_RawMotion)] = { 0 };
+
+    em.deviceid = XIAllMasterDevices;
+    em.mask_len = sizeof(mask);
+    em.mask = mask;
+    XISetMask(mask, XI_RawMotion);
+
+    XISelectEvents(_glfw.x11.display, _glfw.x11.root, &em, 1);
+}
+
+// Disable XI2 raw mouse motion events
+//
+static void disableRawMouseMotion(_GLFWwindow* window UNUSED)
+{
+    XIEventMask em;
+    unsigned char mask[] = { 0 };
+
+    em.deviceid = XIAllMasterDevices;
+    em.mask_len = sizeof(mask);
+    em.mask = mask;
+
+    XISelectEvents(_glfw.x11.display, _glfw.x11.root, &em, 1);
+}
+
 // Apply disabled cursor mode to a focused window
 //
 static void disableCursor(_GLFWwindow* window)
 {
-    if (_glfw.x11.xi.available)
-    {
-        XIEventMask em;
-        unsigned char mask[XIMaskLen(XI_RawMotion)] = { 0 };
-
-        em.deviceid = XIAllMasterDevices;
-        em.mask_len = sizeof(mask);
-        em.mask = mask;
-        XISetMask(mask, XI_RawMotion);
-
-        XISelectEvents(_glfw.x11.display, _glfw.x11.root, &em, 1);
-    }
+    if (window->rawMouseMotion)
+        enableRawMouseMotion(window);
 
     _glfw.x11.disabledCursorWindow = window;
     _glfwPlatformGetCursorPos(window,
@@ -490,17 +509,8 @@ static void disableCursor(_GLFWwindow* window)
 //
 static void enableCursor(_GLFWwindow* window)
 {
-    if (_glfw.x11.xi.available)
-    {
-        XIEventMask em;
-        unsigned char mask[] = { 0 };
-
-        em.deviceid = XIAllMasterDevices;
-        em.mask_len = sizeof(mask);
-        em.mask = mask;
-
-        XISelectEvents(_glfw.x11.display, _glfw.x11.root, &em, 1);
-    }
+    if (window->rawMouseMotion)
+        disableRawMouseMotion(window);
 
     _glfw.x11.disabledCursorWindow = NULL;
     XUngrabPointer(_glfw.x11.display, CurrentTime);
@@ -1122,6 +1132,7 @@ static void processEvent(XEvent *event)
             _GLFWwindow* window = _glfw.x11.disabledCursorWindow;
 
             if (window &&
+                window->rawMouseMotion &&
                 event->xcookie.extension == _glfw.x11.xi.majorOpcode &&
                 XGetEventData(_glfw.x11.display, &event->xcookie) &&
                 event->xcookie.evtype == XI_RawMotion)
@@ -1166,8 +1177,11 @@ static void processEvent(XEvent *event)
     {
         XkbEvent *kb_event = (XkbEvent*)event;
         switch(kb_event->any.xkb_type) {
-            case XkbNewKeyboardNotify:
-                if(!glfw_xkb_update_x11_keyboard_id(&_glfw.x11.xkb)) return;
+            case XkbNewKeyboardNotify: {
+                int32_t old_id = _glfw.x11.xkb.keyboard_device_id;
+                if (!glfw_xkb_update_x11_keyboard_id(&_glfw.x11.xkb)) return;
+                if (old_id != _glfw.x11.xkb.keyboard_device_id) keymap_dirty = true;
+            }
                 /* fallthrough */
             case XkbMapNotify:
             {
@@ -1265,13 +1279,13 @@ static void processEvent(XEvent *event)
 
             // Modern X provides scroll events as mouse button presses
             else if (event->xbutton.button == Button4)
-                _glfwInputScroll(window, 0.0, 1.0, 0);
+                _glfwInputScroll(window, 0.0, 1.0, 0, mods);
             else if (event->xbutton.button == Button5)
-                _glfwInputScroll(window, 0.0, -1.0, 0);
+                _glfwInputScroll(window, 0.0, -1.0, 0, mods);
             else if (event->xbutton.button == Button6)
-                _glfwInputScroll(window, 1.0, 0.0, 0);
+                _glfwInputScroll(window, 1.0, 0.0, 0, mods);
             else if (event->xbutton.button == Button7)
-                _glfwInputScroll(window, -1.0, 0.0, 0);
+                _glfwInputScroll(window, -1.0, 0.0, 0, mods);
 
             else
             {
@@ -1363,7 +1377,7 @@ static void processEvent(XEvent *event)
                 {
                     if (_glfw.x11.disabledCursorWindow != window)
                         return;
-                    if (_glfw.x11.xi.available)
+                    if (window->rawMouseMotion)
                         return;
 
                     const int dx = x - window->x11.lastCursorPosX;
@@ -1408,12 +1422,18 @@ static void processEvent(XEvent *event)
             if (!event->xany.send_event && window->x11.parent != _glfw.x11.root)
             {
                 Window dummy;
+                _glfwGrabErrorHandlerX11();
                 XTranslateCoordinates(_glfw.x11.display,
                                       window->x11.parent,
                                       _glfw.x11.root,
                                       xpos, ypos,
                                       &xpos, &ypos,
                                       &dummy);
+                _glfwReleaseErrorHandlerX11();
+                if (_glfw.x11.errorCode != Success) {
+                    _glfwInputError(GLFW_PLATFORM_ERROR, "X11: Failed to translate ConfigureNotiy co-ords for reparented window");
+                    return;
+                }
             }
 
             if (xpos != window->x11.xpos || ypos != window->x11.ypos)
@@ -1550,17 +1570,21 @@ static void processEvent(XEvent *event)
                 const int xabs = (event->xclient.data.l[2] >> 16) & 0xffff;
                 const int yabs = (event->xclient.data.l[2]) & 0xffff;
                 Window dummy;
-                int xpos, ypos;
+                int xpos = 0, ypos = 0;
 
                 if (_glfw.x11.xdnd.version > _GLFW_XDND_VERSION)
                     return;
 
+                _glfwGrabErrorHandlerX11();
                 XTranslateCoordinates(_glfw.x11.display,
                                       _glfw.x11.root,
                                       window->x11.handle,
                                       xabs, yabs,
                                       &xpos, &ypos,
                                       &dummy);
+                _glfwReleaseErrorHandlerX11();
+                if (_glfw.x11.errorCode != Success)
+                    _glfwInputError(GLFW_PLATFORM_ERROR, "X11: Failed to get DND event position");
 
                 _glfwInputCursorPos(window, xpos, ypos);
 
@@ -1815,7 +1839,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
                               const _GLFWctxconfig* ctxconfig,
                               const _GLFWfbconfig* fbconfig)
 {
-    Visual* visual;
+    Visual* visual = NULL;
     int depth;
 
     if (ctxconfig->client != GLFW_NO_API)
@@ -1841,8 +1865,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
         }
     }
 
-    if (ctxconfig->client == GLFW_NO_API ||
-        ctxconfig->source == GLFW_OSMESA_CONTEXT_API)
+    if (!visual)
     {
         visual = DefaultVisual(_glfw.x11.display, _glfw.x11.screen);
         depth = DefaultDepth(_glfw.x11.display, _glfw.x11.screen);
@@ -1988,10 +2011,14 @@ void _glfwPlatformSetWindowIcon(_GLFWwindow* window,
 void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
 {
     Window dummy;
-    int x, y;
+    int x = 0, y = 0;
 
+    _glfwGrabErrorHandlerX11();
     XTranslateCoordinates(_glfw.x11.display, window->x11.handle, _glfw.x11.root,
                           0, 0, &x, &y, &dummy);
+    _glfwReleaseErrorHandlerX11();
+    if (_glfw.x11.errorCode != Success)
+        _glfwInputError(GLFW_PLATFORM_ERROR, "X11: Failed to get window position");
 
     if (xpos)
         *xpos = x;
@@ -2390,6 +2417,7 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
     {
         return maximized;
     }
+
     const unsigned long count =
         _glfwGetWindowPropertyX11(window->x11.handle,
                                   _glfw.x11.NET_WM_STATE,
@@ -2616,6 +2644,25 @@ _glfwDispatchX11Events(void) {
     return dispatched;
 }
 
+void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window, bool enabled)
+{
+    if (!_glfw.x11.xi.available)
+        return;
+
+    if (_glfw.x11.disabledCursorWindow != window)
+        return;
+
+    if (enabled)
+        enableRawMouseMotion(window);
+    else
+        disableRawMouseMotion(window);
+}
+
+bool _glfwPlatformRawMouseMotionSupported(void)
+{
+    return _glfw.x11.xi.available;
+}
+
 void _glfwPlatformPollEvents(void)
 {
     _glfwDispatchX11Events();

kittens/ask/main.py

@@ -3,6 +3,7 @@
 # License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
 
 import os
+import sys
 from contextlib import suppress
 from typing import TYPE_CHECKING, List, Optional, Tuple
 
@@ -12,7 +13,7 @@ from kitty.constants import cache_dir
 from kitty.typing import BossType
 
 from ..tui.handler import result_handler
-from ..tui.operations import alternate_screen, styled
+from ..tui.operations import alternate_screen, set_cursor_visible, styled
 
 if TYPE_CHECKING:
     import readline
@@ -69,7 +70,7 @@ class HistoryCompleter:
 def option_text() -> str:
     return '''\
 --type -t
-choices=line
+choices=line,yesno
 default=line
 Type of input. Defaults to asking for a line of text.
 
@@ -96,14 +97,30 @@ class Response(TypedDict):
     response: Optional[str]
 
 
+def yesno(cli_opts: AskCLIOptions, items: List[str]) -> Response:
+    import tty
+    with alternate_screen():
+        if cli_opts.message:
+            print(styled(cli_opts.message, bold=True))
+        print()
+        print(' ', styled('Y', fg='green') + 'es', ' ', styled('N', fg='red') + 'o', set_cursor_visible(False))
+        sys.stdout.flush()
+        tty.setraw(sys.stdin.fileno())
+        try:
+            response = sys.stdin.buffer.read(1)
+            yes = response in (b'y', b'Y', b'\r', b'\n' b' ')
+            return {'items': items, 'response': 'y' if yes else 'n'}
+        finally:
+            sys.stdout.write(set_cursor_visible(True))
+            tty.setcbreak(sys.stdin.fileno())
+            sys.stdout.flush()
+
+
 def main(args: List[str]) -> Response:
     # For some reason importing readline in a key handler in the main kitty process
     # causes a crash of the python interpreter, probably because of some global
     # lock
     global readline
-    import readline as rl
-    readline = rl
-    from kitty.shell import init_readline
     msg = 'Ask the user for input'
     try:
         cli_opts, items = parse_args(args[1:], option_text, '', msg, 'kitty ask', result_class=AskCLIOptions)
@@ -113,6 +130,12 @@ def main(args: List[str]) -> Response:
             input('Press enter to quit...')
         raise SystemExit(e.code)
 
+    if cli_opts.type == 'yesno':
+        return yesno(cli_opts, items)
+
+    import readline as rl
+    readline = rl
+    from kitty.shell import init_readline
     init_readline(readline)
     response = None
 
@@ -134,7 +157,6 @@ def handle_result(args: List[str], data: Response, target_window_id: int, boss:
 
 
 if __name__ == '__main__':
-    import sys
     ans = main(sys.argv)
     if ans:
         print(ans)

kittens/diff/highlight.py

@@ -12,6 +12,7 @@ from pygments.formatter import Formatter  # type: ignore
 from pygments.lexers import get_lexer_for_filename  # type: ignore
 from pygments.util import ClassNotFound  # type: ignore
 
+from kitty.multiprocessing import get_process_pool_executor
 from kitty.rgb import color_as_sgr, parse_sharp
 
 from .collect import Collection, Segment, data_for_path, lines_for_path
@@ -139,7 +140,7 @@ def highlight_for_diff(path: str, aliases: Dict[str, str]) -> DiffHighlight:
 def highlight_collection(collection: Collection, aliases: Optional[Dict[str, str]] = None) -> Union[str, Dict[str, DiffHighlight]]:
     jobs = {}
     ans: Dict[str, DiffHighlight] = {}
-    with concurrent.futures.ProcessPoolExecutor(max_workers=os.cpu_count()) as executor:
+    with get_process_pool_executor(prefer_fork=True) as executor:
         for path, item_type, other_path in collection:
             if item_type != 'rename':
                 for p in (path, other_path):

kittens/diff/main.py

@@ -113,13 +113,13 @@ class DiffHandler(Handler):
                 return self.scroll_lines(amt)
             if func == 'change_context':
                 new_ctx = self.current_context_count
-                to = int(args[0])
+                to = args[0]
                 if to == 'all':
                     new_ctx = 100000
                 elif to == 'default':
                     new_ctx = self.original_context_count
                 else:
-                    new_ctx += to
+                    new_ctx += int(to)
                 return self.change_context_count(new_ctx)
             if func == 'start_search':
                 self.start_search(bool(args[0]), bool(args[1]))

kittens/hints/main.py

@@ -419,10 +419,11 @@ programs.
 --type
 default=url
 choices=url,regex,path,line,hash,word,linenum
-The type of text to search for. A value of :code:`linenum` looks for error messages
-using the pattern specified with :option:`--regex`, which must have the named groups,
-path and line. If not specified, will look for :code:`path:line`.
-The :option:`--linenum-action` option controls what to do with the selected error message.
+The type of text to search for. A value of :code:`linenum` is special, it looks
+for error messages using the pattern specified with :option:`--regex`, which
+must have the named groups, :code:`path` and :code:`line`. If not specified,
+will look for :code:`path:line`. The :option:`--linenum-action` option
+controls what to do with the selected error message, other options are ignored.
 
 
 --regex

kittens/icat/main.py

@@ -2,9 +2,11 @@
 # vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
 
+import contextlib
 import mimetypes
 import os
 import re
+import socket
 import signal
 import sys
 import zlib
@@ -339,6 +341,16 @@ help_text = (
 usage = 'image-file-or-url-or-directory ...'
 
 
+@contextlib.contextmanager
+def socket_timeout(seconds: int) -> Generator[None, None, None]:
+    old = socket.getdefaulttimeout()
+    socket.setdefaulttimeout(seconds)
+    try:
+        yield
+    finally:
+        socket.setdefaulttimeout(old)
+
+
 def process_single_item(
     item: Union[bytes, str],
     args: IcatCLIOptions,
@@ -358,7 +370,8 @@ def process_single_item(
             from urllib.request import urlretrieve
             with NamedTemporaryFile(prefix='url-image-data-', delete=False) as tf:
                 try:
-                    urlretrieve(item, filename=tf.name)
+                    with socket_timeout(30):
+                        urlretrieve(item, filename=tf.name)
                 except Exception as e:
                     raise SystemExit('Failed to download image at URL: {} with error: {}'.format(item, e))
                 item = tf.name

kitty/borders.py

@@ -4,15 +4,16 @@
 
 from enum import IntFlag
 from itertools import chain
-from typing import List, Optional, Sequence, Tuple
+from typing import Sequence, Tuple
 
 from .fast_data_types import (
     BORDERS_PROGRAM, add_borders_rect, compile_program, init_borders_program,
     os_window_has_background_image
 )
 from .options_stub import Options
+from .typing import LayoutType
 from .utils import load_shaders
-from .typing import WindowType, LayoutType
+from .window_list import WindowGroup, WindowList
 
 
 class BorderColor(IntFlag):
@@ -30,10 +31,12 @@ def horizontal_edge(os_window_id: int, tab_id: int, color: int, height: int, lef
         add_borders_rect(os_window_id, tab_id, left, top, right, top + height, color)
 
 
-def draw_edges(os_window_id: int, tab_id: int, colors: Sequence[int], window: WindowType, borders: bool = False) -> None:
-    geometry = window.geometry
-    pl, pt = window.effective_padding('left'), window.effective_padding('top')
-    pr, pb = window.effective_padding('right'), window.effective_padding('bottom')
+def draw_edges(os_window_id: int, tab_id: int, colors: Sequence[int], wg: WindowGroup, borders: bool = False) -> None:
+    geometry = wg.geometry
+    if geometry is None:
+        return
+    pl, pt = wg.effective_padding('left'), wg.effective_padding('top')
+    pr, pb = wg.effective_padding('right'), wg.effective_padding('bottom')
     left = geometry.left - pl
     top = geometry.top - pt
     lr = geometry.right
@@ -41,7 +44,7 @@ def draw_edges(os_window_id: int, tab_id: int, colors: Sequence[int], window: Wi
     bt = geometry.bottom
     bottom = bt + pb
     if borders:
-        width = window.effective_border()
+        width = wg.effective_border()
         bt = bottom
         lr = right
         left -= width
@@ -69,8 +72,7 @@ class Borders:
 
     def __call__(
         self,
-        windows: List[WindowType],
-        active_window: Optional[WindowType],
+        all_windows: WindowList,
         current_layout: LayoutType,
         extra_blank_rects: Sequence[Tuple[int, int, int, int]],
         draw_window_borders: bool = True,
@@ -82,31 +84,33 @@ class Borders:
                 left, top, right, bottom = br
                 add_borders_rect(self.os_window_id, self.tab_id, left, top, right, bottom, BorderColor.default_bg)
         bw = 0
-        if windows:
-            bw = windows[0].effective_border()
+        groups = tuple(all_windows.iter_all_layoutable_groups(only_visible=True))
+        if groups:
+            bw = groups[0].effective_border()
         draw_borders = bw > 0 and draw_window_borders
         if draw_borders:
-            border_data = current_layout.resolve_borders(windows, active_window)
+            border_data = current_layout.resolve_borders(all_windows)
+        active_group = all_windows.active_group
 
-        for i, w in enumerate(windows):
-            window_bg = w.screen.color_profile.default_bg
+        for i, wg in enumerate(groups):
+            window_bg = wg.default_bg
             window_bg = (window_bg << 8) | BorderColor.window_bg
             if draw_borders:
                 # Draw the border rectangles
-                if w is active_window and self.draw_active_borders:
+                if wg is active_group and self.draw_active_borders:
                     color = BorderColor.active
                 else:
-                    color = BorderColor.bell if w.needs_attention else BorderColor.inactive
+                    color = BorderColor.bell if wg.needs_attention else BorderColor.inactive
                 try:
                     colors = tuple(color if needed else window_bg for needed in next(border_data))
-                    draw_edges(self.os_window_id, self.tab_id, colors, w, borders=True)
+                    draw_edges(self.os_window_id, self.tab_id, colors, wg, borders=True)
                 except StopIteration:
                     pass
             if not has_background_image:
                 # Draw the background rectangles over the padding region
                 colors = window_bg, window_bg, window_bg, window_bg
-                draw_edges(self.os_window_id, self.tab_id, colors, w)
+                draw_edges(self.os_window_id, self.tab_id, colors, wg)
 
         color = BorderColor.inactive
-        for (left, top, right, bottom) in current_layout.window_independent_borders(windows, active_window):
+        for (left, top, right, bottom) in current_layout.window_independent_borders(all_windows):
             add_borders_rect(self.os_window_id, self.tab_id, left, top, right, bottom, color)

kitty/boss.py

@@ -27,16 +27,18 @@ from .constants import (
     appname, config_dir, is_macos, kitty_exe, supports_primary_selection
 )
 from .fast_data_types import (
+    CLOSE_BEING_CONFIRMED, IMPERATIVE_CLOSE_REQUESTED, NO_CLOSE_REQUESTED,
     ChildMonitor, background_opacity_of, change_background_opacity,
     change_os_window_state, cocoa_set_menubar_title, create_os_window,
-    current_os_window, destroy_global_data, focus_os_window,
-    get_clipboard_string, global_font_size, mark_os_window_for_close,
-    os_window_font_size, patch_global_colors, safe_pipe, set_background_image,
-    set_boss, set_clipboard_string, set_in_sequence_mode, thread_write,
+    current_application_quit_request, current_os_window, destroy_global_data,
+    focus_os_window, get_clipboard_string, global_font_size,
+    mark_os_window_for_close, os_window_font_size, patch_global_colors,
+    safe_pipe, set_application_quit_request, set_background_image, set_boss,
+    set_clipboard_string, set_in_sequence_mode, thread_write,
     toggle_fullscreen, toggle_maximized
 )
 from .keys import get_shortcut, shortcut_matches
-from .layout import set_layout_options
+from .layout.base import set_layout_options
 from .options_stub import Options
 from .rgb import Color, color_from_int
 from .session import Session, create_sessions
@@ -304,10 +306,9 @@ class Boss:
 
     @property
     def active_window_for_cwd(self) -> Optional[Window]:
-        w = self.active_window
-        if w is not None and w.overlay_for is not None and w.overlay_for in self.window_id_map:
-            w = self.window_id_map[w.overlay_for]
-        return w
+        t = self.active_tab
+        if t is not None:
+            return t.active_window_for_cwd
 
     def new_os_window_with_cwd(self, *args: str) -> None:
         w = self.active_window_for_cwd
@@ -336,7 +337,13 @@ class Boss:
                 if not getattr(err, 'hide_traceback', False):
                     response['tb'] = traceback.format_exc()
         else:
-            response = {'ok': False, 'error': 'Remote control is disabled. Add allow_remote_control to your kitty.conf'}
+            no_response = False
+            try:
+                no_response = json.loads(cmd).get('no_response')
+            except Exception:
+                pass
+            if not no_response:
+                response = {'ok': False, 'error': 'Remote control is disabled. Add allow_remote_control to your kitty.conf'}
         return response
 
     def remote_control(self, *args: str) -> None:
@@ -355,15 +362,16 @@ class Boss:
             self.show_error(_('remote_control mapping failed'), str(e))
 
     def peer_message_received(self, msg_bytes: bytes) -> Optional[bytes]:
-        msg = msg_bytes.decode('utf-8')
-        cmd_prefix = '\x1bP@kitty-cmd'
-        if msg.startswith(cmd_prefix):
-            cmd = msg[len(cmd_prefix):-2]
+        cmd_prefix = b'\x1bP@kitty-cmd'
+        terminator = b'\x1b\\'
+        if msg_bytes.startswith(cmd_prefix) and msg_bytes.endswith(terminator):
+            cmd = msg_bytes[len(cmd_prefix):-len(terminator)].decode('utf-8')
             response = self._handle_remote_command(cmd, from_peer=True)
             if response is None:
                 return None
-            return (cmd_prefix + json.dumps(response) + '\x1b\\').encode('utf-8')
-        data = json.loads(msg)
+            return cmd_prefix + json.dumps(response).encode('utf-8') + terminator
+
+        data = json.loads(msg_bytes.decode('utf-8'))
         if isinstance(data, dict) and data.get('cmd') == 'new_instance':
             from .cli_stub import CLIOptions
             startup_id = data.get('startup_id')
@@ -717,6 +725,32 @@ class Boss:
                     text = '\n'.join(parse_uri_list(text))
                 w.paste(text)
 
+    def close_os_window(self) -> None:
+        tm = self.active_tab_manager
+        if tm is not None:
+            self.confirm_os_window_close(tm.os_window_id)
+
+    def confirm_os_window_close(self, os_window_id: int) -> None:
+        tm = self.os_window_map.get(os_window_id)
+        needs_confirmation = tm is not None and self.opts.confirm_os_window_close > 0 and tm.number_of_windows >= self.opts.confirm_os_window_close
+        if not needs_confirmation:
+            mark_os_window_for_close(os_window_id)
+            return
+        if tm is not None:
+            w = tm.active_window
+            self._run_kitten('ask', ['--type=yesno', '--message', _(
+                'Are you sure you want to close this OS window, it has {}'
+                ' windows running?').format(tm.number_of_windows)],
+                window=w,
+                custom_callback=partial(self.handle_close_os_window_confirmation, os_window_id)
+            )
+
+    def handle_close_os_window_confirmation(self, os_window_id: int, data: Dict[str, Any], *a: Any) -> None:
+        if data['response'] == 'y':
+            mark_os_window_for_close(os_window_id)
+        else:
+            mark_os_window_for_close(os_window_id, NO_CLOSE_REQUESTED)
+
     def on_os_window_closed(self, os_window_id: int, viewport_width: int, viewport_height: int) -> None:
         self.cached_values['window-size'] = viewport_width, viewport_height
         tm = self.os_window_map.pop(os_window_id, None)
@@ -730,6 +764,28 @@ class Boss:
         if action is not None:
             action()
 
+    def quit(self, *args: Any) -> None:
+        tm = self.active_tab
+        num = 0
+        for q in self.os_window_map.values():
+            num += q.number_of_windows
+        needs_confirmation = tm is not None and self.opts.confirm_os_window_close > 0 and num >= self.opts.confirm_os_window_close
+        if not needs_confirmation:
+            set_application_quit_request(IMPERATIVE_CLOSE_REQUESTED)
+            return
+        if current_application_quit_request() == CLOSE_BEING_CONFIRMED:
+            return
+        assert tm is not None
+        self._run_kitten('ask', ['--type=yesno', '--message', _(
+            'Are you sure you want to quit kitty, it has {} windows running?').format(num)],
+            window=tm.active_window,
+            custom_callback=self.handle_quit_confirmation
+        )
+        set_application_quit_request(CLOSE_BEING_CONFIRMED)
+
+    def handle_quit_confirmation(self, data: Dict[str, Any], *a: Any) -> None:
+        set_application_quit_request(IMPERATIVE_CLOSE_REQUESTED if data['response'] == 'y' else NO_CLOSE_REQUESTED)
+
     def notify_on_os_window_death(self, address: str) -> None:
         import socket
         s = socket.socket(family=socket.AF_UNIX)
@@ -742,9 +798,9 @@ class Boss:
 
     def display_scrollback(self, window: Window, data: Optional[bytes], cmd: Optional[List[str]]) -> None:
         tab = self.active_tab
-        if tab is not None and window.overlay_for is None:
+        if tab is not None:
             tab.new_special_window(
-                SpecialWindow(cmd, data, _('History'), overlay_for=window.id),
+                SpecialWindow(cmd, data, _('History'), overlay_for=window.id, cwd=window.cwd_of_child),
                 copy_colors_from=self.active_window
                 )
 
@@ -785,7 +841,7 @@ class Boss:
         if end_kitten.no_ui:
             return end_kitten(None, getattr(w, 'id', None), self)
 
-        if w is not None and tab is not None and w.overlay_for is None:
+        if w is not None and tab is not None:
             args[0:0] = [config_dir, kitten]
             if input_data is None:
                 type_of_input = end_kitten.type_of_input
@@ -886,24 +942,35 @@ class Boss:
                 custom_callback=done, action_on_removal=done2)
 
     def kitty_shell(self, window_type: str) -> None:
-        cmd = ['@', kitty_exe(), '@']
+        kw: Dict[str, Any] = {}
+        cmd = [kitty_exe(), '@']
+        aw = self.active_window
+        if aw is not None:
+            kw['env'] = {'KITTY_SHELL_ACTIVE_WINDOW_ID': str(aw.id)}
         if window_type == 'tab':
-            self._new_tab(cmd)
+            tab = self._new_tab(SpecialWindow(cmd, **kw))
+            if tab is not None:
+                for w in tab:
+                    w.allow_remote_control = True
         elif window_type == 'os_window':
-            os_window_id = self._new_os_window(cmd)
-            self.os_window_map[os_window_id]
+            os_window_id = self._new_os_window(SpecialWindow(cmd, **kw))
+            for tab in self.os_window_map[os_window_id]:
+                for w in tab:
+                    w.allow_remote_control = True
         elif window_type == 'overlay':
-            w = self.active_window
             tab = self.active_tab
-            if w is not None and tab is not None and w.overlay_for is None:
-                tab.new_special_window(SpecialWindow(cmd, overlay_for=w.id))
+            if aw is not None and tab is not None:
+                kw['overlay_for'] = aw.id
+                tab.new_special_window(SpecialWindow(cmd, **kw), allow_remote_control=True)
         else:
-            self._new_window(cmd)
+            tab = self.active_tab
+            if tab is not None:
+                tab.new_special_window(SpecialWindow(cmd, **kw), allow_remote_control=True)
 
-    def switch_focus_to(self, window_idx: int) -> None:
+    def switch_focus_to(self, window_id: int) -> None:
         tab = self.active_tab
         if tab:
-            tab.set_active_window_idx(window_idx)
+            tab.set_active_window(window_id)
 
     def open_url(self, url: str, program: Optional[Union[str, List[str]]] = None, cwd: Optional[str] = None) -> None:
         if url:
@@ -1037,7 +1104,7 @@ class Boss:
                     continue
                 arg = q
             cmdline.append(arg)
-        overlay_for = w.id if w and as_overlay and w.overlay_for is None else None
+        overlay_for = w.id if w and as_overlay else None
         return SpecialWindow(cmd, input_data, cwd_from=cwd_from, overlay_for=overlay_for, env=env)
 
     def run_background_process(
@@ -1308,11 +1375,8 @@ class Boss:
                 else:
                     return
 
-        underlaid_window, overlaid_window = src_tab.detach_window(window)
-        if underlaid_window:
-            target_tab.attach_window(underlaid_window)
-        if overlaid_window:
-            target_tab.attach_window(overlaid_window)
+        for detached_window in src_tab.detach_window(window):
+            target_tab.attach_window(detached_window)
         self._cleanup_tab_after_window_removal(src_tab)
         target_tab.make_active()
 
@@ -1358,8 +1422,6 @@ class Boss:
             done_tab_id = tab_id_map[int(data['groupdicts'][0]['index'])]
 
         def done2(target_window_id: int, self: Boss) -> None:
-            if not hasattr(done, 'tab_id'):
-                return
             tab_id = done_tab_id
             target_window = None
             for w in self.all_windows:

kitty/child-monitor.c

@@ -346,7 +346,10 @@ parse_input(ChildMonitor *self) {
     }
 
     if (UNLIKELY(kill_signal_received)) {
-        global_state.terminate = true;
+        global_state.quit_request = IMPERATIVE_CLOSE_REQUESTED;
+        global_state.has_pending_closes = true;
+        request_tick_callback();
+        kill_signal_received = false;
     } else {
         count = self->count;
         for (size_t i = 0; i < count; i++) {
@@ -461,10 +464,10 @@ set_iutf8(int UNUSED fd, bool UNUSED on) {
 
 static PyObject*
 pyset_iutf8(ChildMonitor *self, PyObject *args) {
-    unsigned long window_id;
+    id_type window_id;
     int on;
     PyObject *found = Py_False;
-    if (!PyArg_ParseTuple(args, "kp", &window_id, &on)) return NULL;
+    if (!PyArg_ParseTuple(args, "Kp", &window_id, &on)) return NULL;
     children_mutex(lock);
     for (size_t i = 0; i < self->count; i++) {
         if (children[i].id == window_id) {
@@ -523,17 +526,6 @@ change_menubar_title(PyObject *title UNUSED) {
 #endif
 }
 
-static inline bool
-update_window_title(Window *w, OSWindow *os_window) {
-    if (w->title && w->title != os_window->window_title) {
-        os_window->window_title = w->title;
-        Py_INCREF(os_window->window_title);
-        set_os_window_title(os_window, PyUnicode_AsUTF8(w->title));
-        return true;
-    }
-    return false;
-}
-
 static inline bool
 prepare_to_render_os_window(OSWindow *os_window, monotonic_t now, unsigned int *active_window_id, color_type *active_window_bg, unsigned int *num_visible_windows, bool *all_windows_have_same_bg) {
 #define TD os_window->tab_bar_render_data
@@ -577,7 +569,7 @@ prepare_to_render_os_window(OSWindow *os_window, monotonic_t now, unsigned int *
                 *active_window_id = w->id;
                 collect_cursor_info(&WD.screen->cursor_render_info, w, now, os_window);
                 if (w->cursor_visible_at_last_render != WD.screen->cursor_render_info.is_visible || w->last_cursor_x != WD.screen->cursor_render_info.x || w->last_cursor_y != WD.screen->cursor_render_info.y || w->last_cursor_shape != WD.screen->cursor_render_info.shape) needs_render = true;
-                update_window_title(w, os_window);
+                set_os_window_title_from_window(w, os_window);
                 *active_window_bg = window_bg;
             } else WD.screen->cursor_render_info.is_visible = false;
             if (send_cell_data_to_gpu(WD.vao_idx, WD.gvao_idx, WD.xstart, WD.ystart, WD.dx, WD.dy, WD.screen, os_window)) needs_render = true;
@@ -625,15 +617,6 @@ render_os_window(OSWindow *os_window, monotonic_t now, unsigned int active_windo
 #undef TD
 }
 
-static inline void
-update_os_window_title(OSWindow *os_window) {
-    Tab *tab = os_window->tabs + os_window->active_tab;
-    if (tab->num_windows) {
-        Window *w = tab->windows + tab->active_window;
-        update_window_title(w, os_window);
-    }
-}
-
 static void
 draw_resizing_text(OSWindow *w) {
     char text[32] = {0};
@@ -649,7 +632,13 @@ draw_resizing_text(OSWindow *w) {
 static inline bool
 no_render_frame_received_recently(OSWindow *w, monotonic_t now, monotonic_t max_wait) {
     bool ans = now - w->last_render_frame_received_at > max_wait;
-    if (ans && global_state.debug_rendering) log_error("No render frame received in %.2f seconds, re-requesting at: %f", monotonic_t_to_s_double(max_wait), monotonic_t_to_s_double(now));
+    if (ans && global_state.debug_rendering) {
+        if (global_state.is_wayland) {
+            log_error("No render frame received in %.2f seconds", monotonic_t_to_s_double(max_wait));
+        } else  {
+            log_error("No render frame received in %.2f seconds, re-requesting at: %f", monotonic_t_to_s_double(max_wait), monotonic_t_to_s_double(now));
+        }
+    }
     return ans;
 }
 
@@ -864,32 +853,53 @@ process_pending_resizes(monotonic_t now) {
 }
 
 static inline void
-close_all_windows(void) {
-    for (size_t w = 0; w < global_state.num_os_windows; w++) mark_os_window_for_close(&global_state.os_windows[w], true);
+close_os_window(ChildMonitor *self, OSWindow *os_window) {
+    destroy_os_window(os_window);
+    call_boss(on_os_window_closed, "Kii", os_window->id, os_window->window_width, os_window->window_height);
+    for (size_t t=0; t < os_window->num_tabs; t++) {
+        Tab *tab = os_window->tabs + t;
+        for (size_t w = 0; w < tab->num_windows; w++) mark_child_for_close(self, tab->windows[w].id);
+    }
+    remove_os_window(os_window->id);
 }
 
 static inline bool
 process_pending_closes(ChildMonitor *self) {
-    global_state.has_pending_closes = false;
+    if (global_state.quit_request == CONFIRMABLE_CLOSE_REQUESTED) {
+        call_boss(quit, "");
+    }
+    if (global_state.quit_request == IMPERATIVE_CLOSE_REQUESTED) {
+        for (size_t w = 0; w < global_state.num_os_windows; w++) global_state.os_windows[w].close_request = IMPERATIVE_CLOSE_REQUESTED;
+    }
     bool has_open_windows = false;
     for (size_t w = global_state.num_os_windows; w > 0; w--) {
         OSWindow *os_window = global_state.os_windows + w - 1;
-        if (should_os_window_close(os_window)) {
-            destroy_os_window(os_window);
-            call_boss(on_os_window_closed, "Kii", os_window->id, os_window->window_width, os_window->window_height);
-            for (size_t t=0; t < os_window->num_tabs; t++) {
-                Tab *tab = os_window->tabs + t;
-                for (size_t w = 0; w < tab->num_windows; w++) mark_child_for_close(self, tab->windows[w].id);
-            }
-            remove_os_window(os_window->id);
-        } else has_open_windows = true;
+        switch(os_window->close_request) {
+            case NO_CLOSE_REQUESTED:
+                has_open_windows = true;
+                break;
+            case CONFIRMABLE_CLOSE_REQUESTED:
+                os_window->close_request = CLOSE_BEING_CONFIRMED;
+                call_boss(confirm_os_window_close, "K", os_window->id);
+                if (os_window->close_request == IMPERATIVE_CLOSE_REQUESTED) {
+                    close_os_window(self, os_window);
+                } else has_open_windows = true;
+                break;
+            case CLOSE_BEING_CONFIRMED:
+                has_open_windows = true;
+                break;
+            case IMPERATIVE_CLOSE_REQUESTED:
+                close_os_window(self, os_window);
+                break;
+        }
     }
+    global_state.has_pending_closes = false;
 #ifdef __APPLE__
     if (!OPT(macos_quit_when_last_window_closed)) {
-        if (!has_open_windows && !application_quit_requested()) has_open_windows = true;
+        if (!has_open_windows && global_state.quit_request != IMPERATIVE_CLOSE_REQUESTED) has_open_windows = true;
     }
 #endif
-    return has_open_windows;
+    return !has_open_windows;
 }
 
 #ifdef __APPLE__
@@ -950,23 +960,16 @@ process_global_state(void *data) {
             cocoa_pending_actions = 0;
         }
 #endif
-    if (global_state.terminate) {
-        global_state.terminate = false;
-        close_all_windows();
-#ifdef __APPLE__
-        request_application_quit();
-#endif
-    }
     report_reaped_pids();
-    bool has_open_windows = true;
-    if (global_state.has_pending_closes) has_open_windows = process_pending_closes(self);
-    if (has_open_windows) {
+    bool should_quit = false;
+    if (global_state.has_pending_closes) should_quit = process_pending_closes(self);
+    if (should_quit) {
+        stop_main_loop();
+    } else {
         if (maximum_wait >= 0) {
             if (maximum_wait == 0) request_tick_callback();
             else state_check_timer_enabled = true;
         }
-    } else {
-        stop_main_loop();
     }
     update_main_loop_timer(state_check_timer, MAX(0, maximum_wait), state_check_timer_enabled);
 }
@@ -1279,7 +1282,7 @@ typedef struct {
     char *data;
     size_t capacity, used;
     int fd;
-    bool finished, close_socket;
+    bool finished, close_socket, is_peer_command;
 } PeerReadData;
 static PeerReadData empty_prd = {.fd = -1, 0};
 
@@ -1329,6 +1332,41 @@ accept_peer(int listen_fd, bool shutting_down) {
     return true;
 }
 
+#define KITTY_CMD_PREFIX "\x1bP@kitty-cmd{"
+
+static inline void
+queue_peer_message(ChildMonitor *self, char *buf, size_t sz, int fd) {
+    children_mutex(lock);
+    ensure_space_for(self, messages, Message, self->messages_count + 1, messages_capacity, 16, true);
+    Message *m = self->messages + self->messages_count++;
+    m->data = buf; m->sz = sz; m->fd = fd;
+    children_mutex(unlock);
+    wakeup_main_loop();
+}
+
+static inline void
+dispatch_peer_command(ChildMonitor *self, PeerReadData *rd, int fd) {
+    size_t end = 0;
+    for (size_t i = 0; i < rd->used - 1; i++) {
+        if (rd->data[i] == 0x1b && rd->data[i+1] == '\\') {
+            end = i + 2;
+            break;
+        }
+    }
+    if (!end) return;
+    char *buf = malloc(end + 8);
+    if (buf) {
+        memcpy(buf, rd->data, end);
+        queue_peer_message(self, buf, end, fd);
+    }
+    rd->is_peer_command = false;
+    if (rd->used > end) {
+        rd->used -= end;
+        memmove(rd->data, rd->data + end, rd->used);
+        if (rd->used >= sizeof(KITTY_CMD_PREFIX) - 1 && memcmp(rd->data, KITTY_CMD_PREFIX, sizeof(KITTY_CMD_PREFIX)-1) == 0) rd->is_peer_command = true;
+    } else rd->used = 0;
+}
+
 static inline bool
 read_from_peer(ChildMonitor *self, int s) {
     bool read_finished = false;
@@ -1337,26 +1375,28 @@ read_from_peer(ChildMonitor *self, int s) {
 #define failed(msg) { read_finished = true; log_error("%s", msg); rd->finished = true; rd->close_socket = true; break; }
         if (rd->fd == s) {
             if (rd->used >= rd->capacity) {
-                if (rd->capacity >= 1024 * 1024) failed("Ignoring too large message from peer");
+                if (rd->capacity >= 64 * 1024) failed("Ignoring too large message from peer");
                 rd->capacity = MAX(8192u, rd->capacity * 2);
                 rd->data = realloc(rd->data, rd->capacity);
                 if (!rd->data) failed("Out of memory");
             }
             ssize_t n = recv(s, rd->data + rd->used, rd->capacity - rd->used, 0);
             if (n == 0) {
+                while (rd->is_peer_command) dispatch_peer_command(self, rd, s);
                 read_finished = true; rd->finished = true;
-                children_mutex(lock);
-                ensure_space_for(self, messages, Message, self->messages_count + 1, messages_capacity, 16, true);
-                Message *m = self->messages + self->messages_count++;
-                m->data = rd->data; rd->data = NULL; m->sz = rd->used; m->fd = s;
-                children_mutex(unlock);
-                wakeup_main_loop();
+                if (rd->used) queue_peer_message(self, rd->data, rd->used, s);
+                else free(rd->data);
+                rd->data = NULL;
             } else if (n < 0) {
                 if (errno != EINTR) {
                     perror("Error reading from talk peer");
                     failed("");
                 }
-            } else rd->used += n;
+            } else {
+                if (!rd->used && memcmp(rd->data, KITTY_CMD_PREFIX, sizeof(KITTY_CMD_PREFIX)-1) == 0) rd->is_peer_command = true;
+                rd->used += n;
+                while (rd->is_peer_command) dispatch_peer_command(self, rd, s);
+            }
             break;
         }
     }
@@ -1541,6 +1581,7 @@ static PyMethodDef methods[] = {
     METHOD(main_loop, METH_NOARGS)
     METHOD(mark_for_close, METH_VARARGS)
     METHOD(resize_pty, METH_VARARGS)
+    {"set_iutf8_winid", (PyCFunction)pyset_iutf8, METH_VARARGS, ""},
     {NULL}  /* Sentinel */
 };
 
@@ -1582,7 +1623,6 @@ static PyMethodDef module_methods[] = {
     {"add_timer", (PyCFunction)add_python_timer, METH_VARARGS, ""},
     {"remove_timer", (PyCFunction)remove_python_timer, METH_VARARGS, ""},
     METHODB(monitor_pid, METH_VARARGS),
-    {"set_iutf8_winid", (PyCFunction)pyset_iutf8, METH_VARARGS, ""},
     METHODB(cocoa_set_menubar_title, METH_VARARGS),
     {NULL}  /* Sentinel */
 };

kitty/child.c

@@ -12,6 +12,8 @@
 #include <errno.h>
 #include <string.h>
 #include <signal.h>
+#include <sys/ioctl.h>
+#include <termios.h>
 
 static inline char**
 serialize_string_tuple(PyObject *src) {
@@ -93,7 +95,7 @@ spawn(PyObject *self UNUSED, PyObject *args) {
             // Establish the controlling terminal (see man 7 credentials)
             int tfd = open(name, O_RDWR);
             if (tfd == -1) exit_on_err("Failed to open controlling terminal");
-#ifdef TIOCSTTY
+#ifdef TIOCSCTTY
             // On BSD open() does not establish the controlling terminal
             if (ioctl(tfd, TIOCSCTTY, 0) == -1) exit_on_err("Failed to set controlling terminal with TIOCSCTTY");
 #endif

kitty/cli.py

@@ -289,9 +289,9 @@ class PrintHelpForSeq:
                 leading_indent = indent
             j = '\n' + (' ' * indent)
             lines: List[str] = []
-            for l in text.splitlines():
-                if l:
-                    lines.extend(wrap(l, limit=linesz - indent))
+            for ln in text.splitlines():
+                if ln:
+                    lines.extend(wrap(ln, limit=linesz - indent))
                 else:
                     lines.append('')
             a((' ' * leading_indent) + j.join(lines))
@@ -409,7 +409,10 @@ def as_type_stub(seq: OptionSpecSeq, disabled: OptionSpecSeq, class_name: str, e
         elif otype == 'list':
             t = 'typing.Sequence[str]'
         elif otype in ('choice', 'choices'):
-            t = 'str'
+            if opt['choices']:
+                t = 'typing.Literal[{}]'.format(','.join(f'{x!r}' for x in opt['choices']))
+            else:
+                t = 'str'
         elif otype.startswith('bool-'):
             t = 'bool'
         else:

kitty/client.py

@@ -60,8 +60,8 @@ def screen_cursor_to_column(c: int) -> None:
     write(CSI + '%dG' % c)
 
 
-def screen_cursor_to_line(l: int) -> None:
-    write(CSI + '%dd' % l)
+def screen_cursor_to_line(ln: int) -> None:
+    write(CSI + '%dd' % ln)
 
 
 def screen_set_mode(x: int, private: bool) -> None:

kitty/cocoa_window.m

@@ -14,6 +14,7 @@
 // Needed for _NSGetProgname
 #include <crt_externs.h>
 #include <objc/runtime.h>
+#include <xlocale.h>
 
 #if (MAC_OS_X_VERSION_MAX_ALLOWED < 101200)
 #define NSWindowStyleMaskResizable NSResizableWindowMask
@@ -419,7 +420,13 @@ cocoa_get_lang(PyObject UNUSED *self) {
         locale = [[NSLocale currentLocale] localeIdentifier];
     }
     if (!locale) { Py_RETURN_NONE; }
-    return Py_BuildValue("s", [locale UTF8String]);
+    // Make sure the locale value is valid, that is it can be used
+    // to construct an actual locale
+    const char* locale_utf8 = [locale UTF8String];
+    locale_t test_locale = newlocale(LC_ALL_MASK, locale_utf8, NULL);
+    if (!test_locale) { Py_RETURN_NONE; }
+    freelocale(test_locale);
+    return Py_BuildValue("s", locale_utf8);
 
     } // autoreleasepool
 }

kitty/conf/definition.py

@@ -9,7 +9,7 @@ from typing import (
     Set, Tuple, Union, get_type_hints
 )
 
-from .utils import to_bool
+from .utils import Choice, to_bool
 
 
 def to_string(x: str) -> str:
@@ -56,6 +56,8 @@ class Option:
 
         if type(self.option_type) is type:
             return type_name(self.option_type)
+        if isinstance(self.option_type, Choice):
+            return 'typing.Literal[{}]'.format(','.join(f'{x!r}' for x in self.option_type.all_choices))
         th = get_type_hints(self.option_type)
         try:
             rettype = th['return']

kitty/conf/utils.py

@@ -68,17 +68,21 @@ def python_string(text: str) -> str:
     return ans
 
 
-def choices(*choices: str) -> Callable[[str], str]:
-    defval = choices[0]
-    uc = frozenset(choices)
+class Choice:
 
-    def choice(x: str) -> str:
+    def __init__(self, choices: Sequence[str]):
+        self.defval = choices[0]
+        self.all_choices = frozenset(choices)
+
+    def __call__(self, x: str) -> str:
         x = x.lower()
-        if x not in uc:
-            x = defval
+        if x not in self.all_choices:
+            x = self.defval
         return x
 
-    return choice
+
+def choices(*choices: str) -> Choice:
+    return Choice(choices)
 
 
 def parse_line(

kitty/config.py

@@ -9,8 +9,8 @@ import sys
 from contextlib import contextmanager, suppress
 from functools import partial
 from typing import (
-    Any, Callable, Dict, Generator, Iterable, List, Match, NamedTuple,
-    Optional, Sequence, Set, Tuple, Type, Union
+    Any, Callable, Dict, Generator, Iterable, List, NamedTuple, Optional,
+    Sequence, Set, Tuple, Type, Union
 )
 
 from . import fast_data_types as defines
@@ -24,7 +24,7 @@ from .constants import cache_dir, defconf, is_macos
 from .key_names import get_key_name_lookup, key_name_aliases
 from .options_stub import Options as OptionsStub
 from .typing import EdgeLiteral, TypedDict
-from .utils import log_error
+from .utils import expandvars, log_error
 
 KeySpec = Tuple[int, bool, int]
 KeyMap = Dict[KeySpec, 'KeyAction']
@@ -140,6 +140,20 @@ def float_parse(func: str, rest: str) -> FuncArgsType:
     return func, (float(rest),)
 
 
+@func_with_args('signal_child')
+def signal_child_parse(func: str, rest: str) -> FuncArgsType:
+    import signal
+    signals = []
+    for q in rest.split():
+        try:
+            signum = getattr(signal, q.upper())
+        except AttributeError:
+            log_error(f'Unknown signal: {rest} ignoring')
+        else:
+            signals.append(signum)
+    return func, tuple(signals)
+
+
 @func_with_args('change_font_size')
 def parse_change_font_size(func: str, rest: str) -> Tuple[str, Tuple[bool, Optional[str], float]]:
     vals = rest.strip().split(maxsplit=1)
@@ -311,7 +325,7 @@ def parse_marker_spec(ftype: str, parts: Sequence[str]) -> Tuple[str, Union[str,
 def toggle_marker(func: str, rest: str) -> FuncArgsType:
     parts = rest.split(maxsplit=1)
     if len(parts) != 2:
-        raise ValueError('{} if not a valid marker specification'.format(rest))
+        raise ValueError('{} is not a valid marker specification'.format(rest))
     ftype, spec = parts
     parts = spec.split()
     return func, list(parse_marker_spec(ftype, parts))
@@ -585,20 +599,6 @@ def handle_deprecated_macos_show_window_title_in_menubar_alias(key: str, val: st
     ans['macos_show_window_title_in'] = macos_show_window_title_in
 
 
-def expandvars(val: str, env: Dict[str, str] = {}) -> str:
-
-    def sub(m: Match) -> str:
-        key = m.group(1)
-        result = env.get(key)
-        if result is None:
-            result = os.environ.get(key)
-        if result is None:
-            result = m.group()
-        return result
-
-    return re.sub(r'\$\{(\S+?)\}', sub, val)
-
-
 @special_handler
 def handle_env(key: str, val: str, ans: Dict[str, Any]) -> None:
     key, val = val.partition('=')[::2]

kitty/config_data.py

@@ -18,7 +18,7 @@ from .conf.utils import (
 )
 from .constants import FloatEdges, config_dir, is_macos
 from .fast_data_types import CURSOR_BEAM, CURSOR_BLOCK, CURSOR_UNDERLINE
-from .layout import all_layouts
+from .layout.interface import all_layouts
 from .rgb import Color, color_as_int, color_as_sharp, color_from_int
 from .utils import log_error
 
@@ -304,6 +304,9 @@ or by defining shortcuts for it in kitty.conf, for example::
     map alt+2 disable_ligatures_in all never
     map alt+3 disable_ligatures_in tab cursor
 
+Note that this refers to programming ligatures, typically implemented using the
+:code:`calt` OpenType feature. For disabling general ligatures, use the
+:opt:`font_features` setting.
 '''))
 
 o('font_features', 'none', long_text=_('''
@@ -445,7 +448,8 @@ Program with which to view scrollback in a new window. The scrollback buffer is
 passed as STDIN to this program. If you change it, make sure the program you
 use can handle ANSI escape sequences for colors and text formatting.
 INPUT_LINE_NUMBER in the command line above will be replaced by an integer
-representing which line should be at the top of the screen.'''))
+representing which line should be at the top of the screen. Similarly CURSOR_LINE and CURSOR_COLUMN
+will be replaced by the current cursor position.'''))
 
 o('scrollback_pager_history_size', 0, option_type=scrollback_pager_history_size, long_text=_('''
 Separate scrollback history size, used only for browsing the scrollback buffer (in MB).
@@ -548,7 +552,7 @@ rectangular block with the mouse)'''))
 o('terminal_select_modifiers', 'shift', option_type=to_modifiers, long_text=_('''
 The modifiers to override mouse selection even when a terminal application has grabbed the mouse'''))
 
-o('select_by_word_characters', ':@-./_~?&=%+#', long_text=_('''
+o('select_by_word_characters', '@-./_~?&=%+#', long_text=_('''
 Characters considered part of a word when double clicking. In addition to these characters
 any character that is marked as an alphanumeric character in the unicode
 database will be matched.'''))
@@ -778,6 +782,12 @@ this option can be used to keep the margins as small as possible when resizing t
 Note that this does not currently work on Wayland.
 '''))
 
+o('confirm_os_window_close', 0, option_type=positive_int, long_text=_('''
+Ask for confirmation when closing an OS window that has at least this
+number of kitty windows in it. A value of zero disables confirmation.
+This confirmation also applies to requests to quit the entire application (all
+OS windows, via the quite action).
+'''))
 # }}}
 
 g('tabbar')   # {{{
@@ -788,6 +798,8 @@ def tab_separator(x: str) -> str:
     for q in '\'"':
         if x.startswith(q) and x.endswith(q):
             x = x[1:-1]
+            if not x:
+                return ''
             break
     if not x.strip():
         x = ('\xa0' * len(x)) if x else default_tab_separator
@@ -870,6 +882,11 @@ A template to render the tab title. The default just renders
 the title. If you wish to include the tab-index as well,
 use something like: :code:`{index}: {title}`. Useful
 if you have shortcuts mapped for :code:`goto_tab N`.
+In addition you can use :code:`{layout_name}` for the current
+layout name and :code:`{num_windows}` for the number of windows
+in the tab. Note that formatting is done by Python's string formatting
+machinery, so you can use, for instance, :code:`{layout_name[:2].upper()}` to
+show only the first two letters of the layout name, upper-cased.
 '''))
 o('active_tab_title_template', 'none', option_type=active_tab_title_template, long_text=_('''
 Template to use for active tabs, if not specified falls back
@@ -1369,8 +1386,7 @@ if is_macos:
 k('close_tab', 'kitty_mod+q', 'close_tab', _('Close tab'))
 if is_macos:
     k('close_tab', 'cmd+w', 'close_tab', _('Close tab'), add_to_docs=False)
-    #  Not yet implemented
-    #  k('close_os_window', 'shift+cmd+w', 'close_os_window', _('Close os window'), add_to_docs=False)
+    k('close_os_window', 'shift+cmd+w', 'close_os_window', _('Close OS window'), add_to_docs=False)
 k('move_tab_forward', 'kitty_mod+.', 'move_tab_forward', _('Move tab forward'))
 k('move_tab_backward', 'kitty_mod+,', 'move_tab_backward', _('Move tab backward'))
 k('set_tab_title', 'kitty_mod+alt+t', 'set_tab_title', _('Set tab title'))

kitty/constants.py

@@ -20,7 +20,7 @@ class Version(NamedTuple):
 
 
 appname: str = 'kitty'
-version: Version = Version(0, 17, 3)
+version: Version = Version(0, 18, 1)
 str_version: str = '.'.join(map(str, version))
 _plat = sys.platform.lower()
 is_macos: bool = 'darwin' in _plat

kitty/control-codes.h

@@ -188,6 +188,9 @@
 // *Horizontal position relative*: Same as :data:`CUF`.
 #define HPR 'a'
 
+// Repeat the preceding graphic character Ps times.
+#define REP 'b'
+
 // *Device Attributes*.
 #define DA 'c'
 

kitty/core_text.m

@@ -506,8 +506,10 @@ do_render(CTFontRef ct_font, bool bold, bool italic, hb_glyph_info_t *info, hb_g
         render_alpha_mask(render_buf, canvas, &src, &dest, canvas_width, canvas_width);
     }
     if (num_cells && (center_glyph || (num_cells == 2 && *was_colored))) {
-        // center glyphs (two cell emoji and PUA glyphs)
-        CGFloat delta = (((CGFloat)canvas_width - br.size.width) / 2.f) - br.origin.x;
+        // center glyphs (two cell emoji, PUA glyphs, ligatures, etc)
+        CGFloat delta = (((CGFloat)canvas_width - br.size.width) / 2.f);
+        // FiraCode ligatures result in negative origins
+        if (br.origin.x > 0) delta -= br.origin.x;
         if (delta >= 1.f) right_shift_canvas(canvas, canvas_width, cell_height, (unsigned)(delta));
     }
     return true;

kitty/data-types.c

@@ -216,59 +216,57 @@ PyInit_fast_data_types(void) {
     if (m == NULL) return NULL;
     init_monotonic();
 
-    if (m != NULL) {
-        if (!init_logging(m)) return NULL;
-        if (!init_LineBuf(m)) return NULL;
-        if (!init_HistoryBuf(m)) return NULL;
-        if (!init_Line(m)) return NULL;
-        if (!init_Cursor(m)) return NULL;
-        if (!init_child_monitor(m)) return NULL;
-        if (!init_ColorProfile(m)) return NULL;
-        if (!init_Screen(m)) return NULL;
-        if (!init_glfw(m)) return NULL;
-        if (!init_child(m)) return NULL;
-        if (!init_state(m)) return NULL;
-        if (!init_keys(m)) return NULL;
-        if (!init_graphics(m)) return NULL;
-        if (!init_shaders(m)) return NULL;
-        if (!init_mouse(m)) return NULL;
-        if (!init_kittens(m)) return NULL;
-        if (!init_png_reader(m)) return NULL;
+    if (!init_logging(m)) return NULL;
+    if (!init_LineBuf(m)) return NULL;
+    if (!init_HistoryBuf(m)) return NULL;
+    if (!init_Line(m)) return NULL;
+    if (!init_Cursor(m)) return NULL;
+    if (!init_child_monitor(m)) return NULL;
+    if (!init_ColorProfile(m)) return NULL;
+    if (!init_Screen(m)) return NULL;
+    if (!init_glfw(m)) return NULL;
+    if (!init_child(m)) return NULL;
+    if (!init_state(m)) return NULL;
+    if (!init_keys(m)) return NULL;
+    if (!init_graphics(m)) return NULL;
+    if (!init_shaders(m)) return NULL;
+    if (!init_mouse(m)) return NULL;
+    if (!init_kittens(m)) return NULL;
+    if (!init_png_reader(m)) return NULL;
 #ifdef __APPLE__
-        if (!init_macos_process_info(m)) return NULL;
-        if (!init_CoreText(m)) return NULL;
-        if (!init_cocoa(m)) return NULL;
+    if (!init_macos_process_info(m)) return NULL;
+    if (!init_CoreText(m)) return NULL;
+    if (!init_cocoa(m)) return NULL;
 #else
-        if (!init_freetype_library(m)) return NULL;
-        if (!init_fontconfig_library(m)) return NULL;
-        if (!init_desktop(m)) return NULL;
+    if (!init_freetype_library(m)) return NULL;
+    if (!init_fontconfig_library(m)) return NULL;
+    if (!init_desktop(m)) return NULL;
 #endif
-        if (!init_fonts(m)) return NULL;
+    if (!init_fonts(m)) return NULL;
 
-        PyModule_AddIntConstant(m, "BOLD", BOLD_SHIFT);
-        PyModule_AddIntConstant(m, "ITALIC", ITALIC_SHIFT);
-        PyModule_AddIntConstant(m, "REVERSE", REVERSE_SHIFT);
-        PyModule_AddIntConstant(m, "STRIKETHROUGH", STRIKE_SHIFT);
-        PyModule_AddIntConstant(m, "DIM", DIM_SHIFT);
-        PyModule_AddIntConstant(m, "DECORATION", DECORATION_SHIFT);
-        PyModule_AddIntConstant(m, "MARK", MARK_SHIFT);
-        PyModule_AddIntConstant(m, "MARK_MASK", MARK_MASK);
-        PyModule_AddStringMacro(m, ERROR_PREFIX);
+    PyModule_AddIntConstant(m, "BOLD", BOLD_SHIFT);
+    PyModule_AddIntConstant(m, "ITALIC", ITALIC_SHIFT);
+    PyModule_AddIntConstant(m, "REVERSE", REVERSE_SHIFT);
+    PyModule_AddIntConstant(m, "STRIKETHROUGH", STRIKE_SHIFT);
+    PyModule_AddIntConstant(m, "DIM", DIM_SHIFT);
+    PyModule_AddIntConstant(m, "DECORATION", DECORATION_SHIFT);
+    PyModule_AddIntConstant(m, "MARK", MARK_SHIFT);
+    PyModule_AddIntConstant(m, "MARK_MASK", MARK_MASK);
+    PyModule_AddStringMacro(m, ERROR_PREFIX);
 #ifdef KITTY_VCS_REV
-        PyModule_AddStringMacro(m, KITTY_VCS_REV);
+    PyModule_AddStringMacro(m, KITTY_VCS_REV);
 #endif
-        PyModule_AddIntMacro(m, CURSOR_BLOCK);
-        PyModule_AddIntMacro(m, CURSOR_BEAM);
-        PyModule_AddIntMacro(m, CURSOR_UNDERLINE);
-        PyModule_AddIntMacro(m, DECAWM);
-        PyModule_AddIntMacro(m, DECCOLM);
-        PyModule_AddIntMacro(m, DECOM);
-        PyModule_AddIntMacro(m, IRM);
-        PyModule_AddIntMacro(m, CSI);
-        PyModule_AddIntMacro(m, DCS);
-        PyModule_AddIntMacro(m, APC);
-        PyModule_AddIntMacro(m, OSC);
-    }
+    PyModule_AddIntMacro(m, CURSOR_BLOCK);
+    PyModule_AddIntMacro(m, CURSOR_BEAM);
+    PyModule_AddIntMacro(m, CURSOR_UNDERLINE);
+    PyModule_AddIntMacro(m, DECAWM);
+    PyModule_AddIntMacro(m, DECCOLM);
+    PyModule_AddIntMacro(m, DECOM);
+    PyModule_AddIntMacro(m, IRM);
+    PyModule_AddIntMacro(m, CSI);
+    PyModule_AddIntMacro(m, DCS);
+    PyModule_AddIntMacro(m, APC);
+    PyModule_AddIntMacro(m, OSC);
 
     return m;
 }

kitty/data-types.h

@@ -253,17 +253,6 @@ typedef struct {FONTS_DATA_HEAD} *FONTS_DATA_HANDLE;
 
 #define clear_sprite_position(cell) (cell).sprite_x = 0; (cell).sprite_y = 0; (cell).sprite_z = 0;
 
-#define left_shift_line(line, at, num) { \
-    for(index_type __i__ = (at); __i__ < (line)->xnum - (num); __i__++) { \
-        COPY_CELL(line, __i__ + (num), line, __i__) \
-    } \
-    if ((((line)->gpu_cells[(at)].attrs) & WIDTH_MASK) != 1) { \
-        (line)->cpu_cells[(at)].ch = BLANK_CHAR; \
-        (line)->gpu_cells[(at)].attrs = BLANK_CHAR ? 1 : 0; \
-        clear_sprite_position((line)->gpu_cells[(at)]); \
-    }\
-}
-
 #define ensure_space_for(base, array, type, num, capacity, initial_cap, zero_mem) \
     if ((base)->capacity < num) { \
         size_t _newcap = MAX((size_t)initial_cap, MAX(2 * (base)->capacity, (size_t)num)); \
@@ -313,8 +302,7 @@ void set_mouse_cursor(MouseShape);
 void enter_event(void);
 void mouse_event(int, int, int);
 void focus_in_event(void);
-void scroll_event(double, double, int);
-void fake_scroll(int, bool);
+void scroll_event(double, double, int, int);
 void set_special_key_combo(int glfw_key, int mods, bool is_native);
 void on_key_input(GLFWkeyevent *ev);
 void request_window_attention(id_type, bool);

kitty/desktop.c

@@ -30,18 +30,26 @@ static void* libsn_handle = NULL;
 static PyObject*
 init_x11_startup_notification(PyObject UNUSED *self, PyObject *args) {
     static bool done = false;
-    static const char* libname = "libstartup-notification-1.so";
-    // some installs are missing the .so symlink, so try the full name
-    static const char* libname2 = "libstartup-notification-1.so.0";
-    static const char* libname3 = "libstartup-notification-1.so.0.0.0";
     if (!done) {
         done = true;
 
-        libsn_handle = dlopen(libname, RTLD_LAZY);
-        if (libsn_handle == NULL) libsn_handle = dlopen(libname2, RTLD_LAZY);
-        if (libsn_handle == NULL) libsn_handle = dlopen(libname3, RTLD_LAZY);
+        const char* libnames[] = {
+#if defined(_KITTY_STARTUP_NOTIFICATION_LIBRARY)
+            _KITTY_STARTUP_NOTIFICATION_LIBRARY,
+#else
+            "libstartup-notification-1.so",
+            // some installs are missing the .so symlink, so try the full name
+            "libstartup-notification-1.so.0",
+            "libstartup-notification-1.so.0.0.0",
+#endif
+            NULL
+        };
+        for (int i = 0; libnames[i]; i++) {
+            libsn_handle = dlopen(libnames[i], RTLD_LAZY);
+            if (libsn_handle) break;
+        }
         if (libsn_handle == NULL) {
-            PyErr_Format(PyExc_OSError, "Failed to load %s with error: %s", libname, dlerror());
+            PyErr_Format(PyExc_OSError, "Failed to load %s with error: %s", libnames[0], dlerror());
             return NULL;
         }
         dlerror();    /* Clear any existing error */
@@ -105,18 +113,26 @@ load_libcanberra_functions(void) {
 
 static void
 load_libcanberra(void) {
-    static const char* libname = "libcanberra.so";
-    // some installs are missing the .so symlink, so try the full name
-    static const char* libname2 = "libcanberra.so.0";
-    static const char* libname3 = "libcanberra.so.0.2.5";
     static bool done = false;
     if (done) return;
     done = true;
-    libcanberra_handle = dlopen(libname, RTLD_LAZY);
-    if (libcanberra_handle == NULL) libcanberra_handle = dlopen(libname2, RTLD_LAZY);
-    if (libcanberra_handle == NULL) libcanberra_handle = dlopen(libname3, RTLD_LAZY);
+    const char* libnames[] = {
+#if defined(_KITTY_CANBERRA_LIBRARY)
+        _KITTY_CANBERRA_LIBRARY,
+#else
+        "libcanberra.so",
+        // some installs are missing the .so symlink, so try the full name
+        "libcanberra.so.0",
+        "libcanberra.so.0.2.5",
+#endif
+        NULL
+    };
+    for (int i = 0; libnames[i]; i++) {
+        libcanberra_handle = dlopen(libnames[i], RTLD_LAZY);
+        if (libcanberra_handle) break;
+    }
     if (libcanberra_handle == NULL) {
-        fprintf(stderr, "Failed to load %s, cannot play beep sound, with error: %s\n", libname, dlerror());
+        fprintf(stderr, "Failed to load %s, cannot play beep sound, with error: %s\n", libnames[0], dlerror());
         return;
     }
     load_libcanberra_functions();

kitty/fast_data_types.pyi

@@ -10,6 +10,9 @@ from kitty.options_stub import Options
 
 # Constants {{{
 KITTY_VCS_REV: str
+NO_CLOSE_REQUESTED: int
+IMPERATIVE_CLOSE_REQUESTED: int
+CLOSE_BEING_CONFIRMED: int
 ERROR_PREFIX: str
 GLSL_VERSION: int
 GLFW_IBEAM_CURSOR: int
@@ -544,12 +547,16 @@ def update_window_title(
 
 
 def update_window_visibility(
-    os_window_id: int, tab_id: int, window_id: int, window_idx: int,
+    os_window_id: int, tab_id: int, window_id: int,
     visible: bool
 ) -> None:
     pass
 
 
+def sync_os_window_title(os_window_id: int) -> None:
+    pass
+
+
 def set_options(
     opts: Options,
     is_wayland: bool = False,
@@ -702,7 +709,15 @@ def cocoa_get_lang() -> Optional[str]:
     pass
 
 
-def mark_os_window_for_close(os_window_id: int, yes: bool = True) -> bool:
+def mark_os_window_for_close(os_window_id: int, cr_type: int = 2) -> bool:
+    pass
+
+
+def set_application_quit_request(cr_type: int = 2) -> None:
+    pass
+
+
+def current_application_quit_request() -> int:
     pass
 
 
@@ -770,15 +785,11 @@ def swap_tabs(os_window_id: int, a: int, b: int) -> None:
     pass
 
 
-def swap_windows(os_window_id: int, tab_id: int, a: int, b: int) -> None:
-    pass
-
-
 def set_active_tab(os_window_id: int, a: int) -> None:
     pass
 
 
-def set_active_window(os_window_id: int, tab_id: int, window_idx: int) -> None:
+def set_active_window(os_window_id: int, tab_id: int, window_id: int) -> None:
     pass
 
 
@@ -1059,7 +1070,7 @@ def set_tab_bar_render_data(
 
 
 def set_window_render_data(
-    os_window_id: int, tab_id: int, window_id: int, window_idx: int,
+    os_window_id: int, tab_id: int, window_id: int,
     xstart: float, ystart: float, dx: float, dy: float, screen: Screen,
     left: int, top: int, right: int, bottom: int
 ) -> None:

kitty/fonts.c

@@ -1004,14 +1004,20 @@ merge_groups_for_pua_space_ligature(void) {
     G(groups)->is_space_ligature = true;
 }
 
+static inline bool
+is_group_calt_ligature(const Group *group) {
+    GPUCell *first_cell = G(first_gpu_cell) + group->first_cell_idx;
+    return group->num_cells > 1 && group->has_special_glyph && (first_cell->attrs & WIDTH_MASK) == 1;
+}
+
+
 static inline void
 split_run_at_offset(index_type cursor_offset, index_type *left, index_type *right) {
     *left = 0; *right = 0;
     for (unsigned idx = 0; idx < G(group_idx) + 1; idx++) {
         Group *group = G(groups) + idx;
         if (group->first_cell_idx <= cursor_offset && cursor_offset < group->first_cell_idx + group->num_cells) {
-            GPUCell *first_cell = G(first_gpu_cell) + group->first_cell_idx;
-            if (group->num_cells > 1 && group->has_special_glyph && (first_cell->attrs & WIDTH_MASK) == 1) {
+            if (is_group_calt_ligature(group)) {
                 // likely a calt ligature
                 *left = group->first_cell_idx; *right = group->first_cell_idx + group->num_cells;
             }
@@ -1039,6 +1045,11 @@ render_groups(FontGroup *fg, Font *font, bool center_glyph) {
         // there exist stupid fonts like Powerline that have no space glyph,
         // so special case it: https://github.com/kovidgoyal/kitty/issues/1225
         unsigned int num_glyphs = group->is_space_ligature ? 1 : group->num_glyphs;
+#ifdef __APPLE__
+        // FiraCode ligatures need to be centered on macOS
+        // see https://github.com/kovidgoyal/kitty/issues/2591
+        if (is_group_calt_ligature(group)) center_glyph = true;
+#endif
         render_group(fg, group->num_cells, num_glyphs, G(first_cpu_cell) + group->first_cell_idx, G(first_gpu_cell) + group->first_cell_idx, G(info) + group->first_glyph_idx, G(positions) + group->first_glyph_idx, font, primary, &ed, center_glyph);
         idx++;
     }

kitty/fonts/render.py

@@ -6,7 +6,9 @@ import ctypes
 import sys
 from functools import partial
 from math import ceil, cos, floor, pi
-from typing import Any, Callable, Dict, List, Optional, Tuple, Union, cast
+from typing import (
+    Any, Callable, Dict, Generator, List, Optional, Tuple, Union, cast
+)
 
 from kitty.config import defaults
 from kitty.constants import is_macos
@@ -43,24 +45,94 @@ def font_for_family(family: str) -> Tuple[FontObject, bool, bool]:
     return font_for_family_fontconfig(family)
 
 
+Range = Tuple[Tuple[int, int], str]
+
+
+def merge_ranges(a: Range, b: Range, priority_map: Dict[Tuple[int, int], int]) -> Generator[Range, None, None]:
+    a_start, a_end = a[0]
+    b_start, b_end = b[0]
+    a_val, b_val = a[1], b[1]
+    a_prio, b_prio = priority_map[a[0]], priority_map[b[0]]
+    if b_start > a_end:
+        if b_start == a_end + 1 and a_val == b_val:
+            # ranges can be coalesced
+            r = ((a_start, b_end), a_val)
+            priority_map[r[0]] = max(a_prio, b_prio)
+            yield r
+            return
+        # disjoint ranges
+        yield a
+        yield b
+        return
+    if a_val == b_val:
+        # mergeable ranges
+        r = ((a_start, max(a_end, b_end)), a_val)
+        priority_map[r[0]] = max(a_prio, b_prio)
+        yield r
+        return
+    before_range = mid_range = after_range = None
+    before_range_prio = mid_range_prio = after_range_prio = 0
+    if b_start > a_start:
+        before_range = ((a_start, b_start - 1), a_val)
+        before_range_prio = a_prio
+    mid_end = min(a_end, b_end)
+    if mid_end >= b_start:
+        # overlap range
+        mid_range = ((b_start, mid_end), a_val if priority_map[a[0]] >= priority_map[b[0]] else b_val)
+        mid_range_prio = max(a_prio, b_prio)
+    # after range
+    if mid_end is a_end:
+        if b_end > a_end:
+            after_range = ((a_end + 1, b_end), b_val)
+            after_range_prio = b_prio
+    else:
+        if a_end > b_end:
+            after_range = ((b_end + 1, a_end), a_val)
+            after_range_prio = a_prio
+    # check if the before, mid and after ranges can be coalesced
+    ranges: List[Range] = []
+    priorities: List[int] = []
+    for rq, prio in ((before_range, before_range_prio), (mid_range, mid_range_prio), (after_range, after_range_prio)):
+        if rq is None:
+            continue
+        r = rq
+        if ranges:
+            x = ranges[-1]
+            if x[0][1] + 1 == r[0][0] and x[1] == r[1]:
+                ranges[-1] = ((x[0][0], r[0][1]), x[1])
+                priorities[-1] = max(priorities[-1], prio)
+            else:
+                ranges.append(r)
+                priorities.append(prio)
+        else:
+            ranges.append(r)
+            priorities.append(prio)
+    for r, p in zip(ranges, priorities):
+        priority_map[r[0]] = p
+    yield from ranges
+
+
 def coalesce_symbol_maps(maps: Dict[Tuple[int, int], str]) -> Dict[Tuple[int, int], str]:
     if not maps:
         return maps
-    items = tuple((k, maps[k]) for k in sorted(maps))
-    ans = [items[0]]
+    priority_map = {r: i for i, r in enumerate(maps.keys())}
+    ranges = tuple((r, maps[r]) for r in sorted(maps))
+    ans = [ranges[0]]
 
-    def merge(prev_item: Tuple[Tuple[int, int], str], item: Tuple[Tuple[int, int], str]) -> None:
-        s, e = item[0]
-        pe = prev_item[0][1]
-        ans[-1] = ((prev_item[0][0], max(pe, e)), prev_item[1])
-
-    for item in items[1:]:
-        current_item = ans[-1]
-        if current_item[1] != item[1] or item[0][0] > current_item[0][1] + 1:
-            ans.append(item)
+    for i in range(1, len(ranges)):
+        r = ranges[i]
+        new_ranges = merge_ranges(ans[-1], r, priority_map)
+        if ans:
+            del ans[-1]
+        if not ans:
+            ans = list(new_ranges)
         else:
-            merge(current_item, item)
-
+            for r in new_ranges:
+                prev = ans[-1]
+                if prev[0][1] + 1 == r[0][0] and prev[1] == r[1]:
+                    ans[-1] = (prev[0][0], r[0][1]), prev[1]
+                else:
+                    ans.append(r)
     return dict(ans)
 
 

kitty/glfw-wrapper.c

@@ -216,6 +216,9 @@ load_glfw(const char* path) {
     *(void **) (&glfwSetWindowCloseCallback_impl) = dlsym(handle, "glfwSetWindowCloseCallback");
     if (glfwSetWindowCloseCallback_impl == NULL) fail("Failed to load glfw function glfwSetWindowCloseCallback with error: %s", dlerror());
 
+    *(void **) (&glfwSetApplicationCloseCallback_impl) = dlsym(handle, "glfwSetApplicationCloseCallback");
+    if (glfwSetApplicationCloseCallback_impl == NULL) fail("Failed to load glfw function glfwSetApplicationCloseCallback with error: %s", dlerror());
+
     *(void **) (&glfwSetWindowRefreshCallback_impl) = dlsym(handle, "glfwSetWindowRefreshCallback");
     if (glfwSetWindowRefreshCallback_impl == NULL) fail("Failed to load glfw function glfwSetWindowRefreshCallback with error: %s", dlerror());
 
@@ -246,6 +249,9 @@ load_glfw(const char* path) {
     *(void **) (&glfwSetInputMode_impl) = dlsym(handle, "glfwSetInputMode");
     if (glfwSetInputMode_impl == NULL) fail("Failed to load glfw function glfwSetInputMode with error: %s", dlerror());
 
+    *(void **) (&glfwRawMouseMotionSupported_impl) = dlsym(handle, "glfwRawMouseMotionSupported");
+    if (glfwRawMouseMotionSupported_impl == NULL) fail("Failed to load glfw function glfwRawMouseMotionSupported with error: %s", dlerror());
+
     *(void **) (&glfwGetKeyName_impl) = dlsym(handle, "glfwGetKeyName");
     if (glfwGetKeyName_impl == NULL) fail("Failed to load glfw function glfwGetKeyName with error: %s", dlerror());
 

kitty/glfw-wrapper.h

@@ -569,6 +569,33 @@
  *  @analysis Application programmer error.  Fix the offending call.
  */
 #define GLFW_NO_WINDOW_CONTEXT      0x0001000A
+/*! @brief The reuqested feature is not provided by the platform.
+ *
+ *  The requested feature is not provided by the platform, so GLFW is unable to
+ *  implement it.  The documentation for each function notes if it could emit
+ *  this error.
+ *
+ *  @analysis Platform or platform version limitation.  The error can be ignored
+ *  unless the feature is critical to the application.
+ *
+ *  @par
+ *  A function call that emits this error has no effect other than the error and
+ *  updating any existing out parameters.
+ */
+#define GLFW_FEATURE_UNAVAILABLE    0x0001000C
+/*! @brief The requested feature is not implemented for the platform.
+ *
+ *  The requested feature has not yet been implemented in GLFW for this platform.
+ *
+ *  @analysis An incomplete implementation of GLFW for this platform, hopefully
+ *  fixed in a future release.  The error can be ignored unless the feature is
+ *  critical to the application.
+ *
+ *  @par
+ *  A function call that emits this error has no effect other than the error and
+ *  updating any existing out parameters.
+ */
+#define GLFW_FEATURE_UNIMPLEMENTED  0x0001000D
 /*! @} */
 
 /*! @addtogroup window
@@ -839,6 +866,7 @@
 #define GLFW_STICKY_KEYS            0x00033002
 #define GLFW_STICKY_MOUSE_BUTTONS   0x00033003
 #define GLFW_LOCK_KEY_MODS          0x00033004
+#define GLFW_RAW_MOUSE_MOTION       0x00033005
 
 #define GLFW_CURSOR_NORMAL          0x00034001
 #define GLFW_CURSOR_HIDDEN          0x00034002
@@ -1082,6 +1110,22 @@ typedef void (* GLFWwindowsizefun)(GLFWwindow*,int,int);
  */
 typedef void (* GLFWwindowclosefun)(GLFWwindow*);
 
+/*! @brief The function pointer type for application close callbacks.
+ *
+ *  This is the function pointer type for application close callbacks.  A application
+ *  close callback function has the following signature:
+ *  @code
+ *  void function_name(int flags)
+ *  @endcode
+ *
+ *  @param[in] flags 0 for a user requested application quit, 1 if a fatal error occurred and application should quit ASAP
+ *
+ *  @sa @ref glfwSetApplicationCloseCallback
+ *
+ *  @ingroup window
+ */
+typedef void (* GLFWapplicationclosefun)(int);
+
 /*! @brief The function pointer type for window content refresh callbacks.
  *
  *  This is the function pointer type for window content refresh callbacks.
@@ -1313,6 +1357,7 @@ typedef void (* GLFWcursorenterfun)(GLFWwindow*,int);
  *  value 2 for stationary momentum scrolling, value 3 for momentum scrolling
  *  in progress, value 4 for momentum scrolling ended, value 5 for momentum
  *  scrolling cancelled and value 6 if scrolling may begin soon.
+ *  @param[int] mods The keyboard modifiers
  *
  *  @sa @ref scrolling
  *  @sa @ref glfwSetScrollCallback
@@ -1322,7 +1367,7 @@ typedef void (* GLFWcursorenterfun)(GLFWwindow*,int);
  *
  *  @ingroup input
  */
-typedef void (* GLFWscrollfun)(GLFWwindow*,double,double,int);
+typedef void (* GLFWscrollfun)(GLFWwindow*,double,double,int,int);
 
 /*! @brief The function pointer type for key callbacks.
  *
@@ -1857,6 +1902,10 @@ typedef GLFWwindowclosefun (*glfwSetWindowCloseCallback_func)(GLFWwindow*, GLFWw
 GFW_EXTERN glfwSetWindowCloseCallback_func glfwSetWindowCloseCallback_impl;
 #define glfwSetWindowCloseCallback glfwSetWindowCloseCallback_impl
 
+typedef GLFWapplicationclosefun (*glfwSetApplicationCloseCallback_func)(GLFWapplicationclosefun);
+GFW_EXTERN glfwSetApplicationCloseCallback_func glfwSetApplicationCloseCallback_impl;
+#define glfwSetApplicationCloseCallback glfwSetApplicationCloseCallback_impl
+
 typedef GLFWwindowrefreshfun (*glfwSetWindowRefreshCallback_func)(GLFWwindow*, GLFWwindowrefreshfun);
 GFW_EXTERN glfwSetWindowRefreshCallback_func glfwSetWindowRefreshCallback_impl;
 #define glfwSetWindowRefreshCallback glfwSetWindowRefreshCallback_impl
@@ -1897,6 +1946,10 @@ typedef void (*glfwSetInputMode_func)(GLFWwindow*, int, int);
 GFW_EXTERN glfwSetInputMode_func glfwSetInputMode_impl;
 #define glfwSetInputMode glfwSetInputMode_impl
 
+typedef int (*glfwRawMouseMotionSupported_func)(void);
+GFW_EXTERN glfwRawMouseMotionSupported_func glfwRawMouseMotionSupported_impl;
+#define glfwRawMouseMotionSupported glfwRawMouseMotionSupported_impl
+
 typedef const char* (*glfwGetKeyName_func)(int, int);
 GFW_EXTERN glfwGetKeyName_func glfwGetKeyName_impl;
 #define glfwGetKeyName glfwGetKeyName_impl

kitty/glfw.c

@@ -152,19 +152,15 @@ blank_os_window(OSWindow *w) {
 static void
 window_close_callback(GLFWwindow* window) {
     if (!set_callback_window(window)) return;
-    global_state.has_pending_closes = true;
-    request_tick_callback();
+    if (global_state.callback_os_window->close_request == NO_CLOSE_REQUESTED) {
+        global_state.callback_os_window->close_request = CONFIRMABLE_CLOSE_REQUESTED;
+        global_state.has_pending_closes = true;
+        request_tick_callback();
+    }
+    glfwSetWindowShouldClose(window, false);
     global_state.callback_os_window = NULL;
 }
 
-#ifdef __APPLE__
-static void
-application_quit_canary_close_requested(GLFWwindow *window UNUSED) {
-    global_state.has_pending_closes = true;
-    request_tick_callback();
-}
-#endif
-
 static void
 window_occlusion_callback(GLFWwindow *window, bool occluded UNUSED) {
     if (!set_callback_window(window)) return;
@@ -231,10 +227,38 @@ refresh_callback(GLFWwindow *w) {
 
 static int mods_at_last_key_or_button_event = 0;
 
+static inline int
+key_to_modifier(int key) {
+    switch(key) {
+        case GLFW_KEY_LEFT_SHIFT:
+        case GLFW_KEY_RIGHT_SHIFT:
+            return GLFW_MOD_SHIFT;
+        case GLFW_KEY_LEFT_CONTROL:
+        case GLFW_KEY_RIGHT_CONTROL:
+            return GLFW_MOD_CONTROL;
+        case GLFW_KEY_LEFT_ALT:
+        case GLFW_KEY_RIGHT_ALT:
+            return GLFW_MOD_ALT;
+        case GLFW_KEY_LEFT_SUPER:
+        case GLFW_KEY_RIGHT_SUPER:
+            return GLFW_MOD_SUPER;
+        default:
+            return -1;
+    }
+}
+
 static void
 key_callback(GLFWwindow *w, GLFWkeyevent *ev) {
     if (!set_callback_window(w)) return;
     mods_at_last_key_or_button_event = ev->mods;
+    int key_modifier = key_to_modifier(ev->key);
+    if (key_modifier != -1) {
+        if (ev->action == GLFW_RELEASE) {
+            mods_at_last_key_or_button_event &= ~key_modifier;
+        } else {
+            mods_at_last_key_or_button_event |= key_modifier;
+        }
+    }
     global_state.callback_os_window->cursor_blink_zero_time = monotonic();
     if (ev->key >= 0 && ev->key <= GLFW_KEY_LAST) {
         global_state.callback_os_window->is_key_pressed[ev->key] = ev->action == GLFW_RELEASE ? false : true;
@@ -287,12 +311,12 @@ cursor_pos_callback(GLFWwindow *w, double x, double y) {
 }
 
 static void
-scroll_callback(GLFWwindow *w, double xoffset, double yoffset, int flags) {
+scroll_callback(GLFWwindow *w, double xoffset, double yoffset, int flags, int mods) {
     if (!set_callback_window(w)) return;
     show_mouse_cursor(w);
     monotonic_t now = monotonic();
     global_state.callback_os_window->last_mouse_activity_at = now;
-    if (is_window_ready_for_callbacks()) scroll_event(xoffset, yoffset, flags);
+    if (is_window_ready_for_callbacks()) scroll_event(xoffset, yoffset, flags, mods);
     request_tick_callback();
     global_state.callback_os_window = NULL;
 }
@@ -323,25 +347,32 @@ window_focus_callback(GLFWwindow *w, int focused) {
 static int
 drop_callback(GLFWwindow *w, const char *mime, const char *data, size_t sz) {
     if (!set_callback_window(w)) return 0;
+#define RETURN(x) { global_state.callback_os_window = NULL; return x; }
     if (!data) {
-        if (strcmp(mime, "text/uri-list") == 0) return 3;
-        if (strcmp(mime, "text/plain;charset=utf-8") == 0) return 2;
-        if (strcmp(mime, "text/plain") == 0) return 1;
-        return 0;
+        if (strcmp(mime, "text/uri-list") == 0) RETURN(3);
+        if (strcmp(mime, "text/plain;charset=utf-8") == 0) RETURN(2);
+        if (strcmp(mime, "text/plain") == 0) RETURN(1);
+        RETURN(0);
     }
-    WINDOW_CALLBACK(on_drop, "sy#", mime, data, (int)sz);
+    WINDOW_CALLBACK(on_drop, "sy#", mime, data, (Py_ssize_t)sz);
     request_tick_callback();
-    /* PyObject *s = PyTuple_New(count); */
-    /* if (s) { */
-    /*     for (int i = 0; i < count; i++) PyTuple_SET_ITEM(s, i, PyUnicode_FromString(strings[i])); */
-    /*     WINDOW_CALLBACK(on_drop, "O", s); */
-    /*     Py_CLEAR(s); */
-    /*     request_tick_callback(); */
-    /* } */
-    global_state.callback_os_window = NULL;
-    return 0;
+    RETURN(0);
+#undef RETURN
 }
 
+static void
+application_close_requested_callback(int flags) {
+    if (flags) {
+        global_state.quit_request = IMPERATIVE_CLOSE_REQUESTED;
+        request_tick_callback();
+    } else {
+        if (global_state.quit_request == NO_CLOSE_REQUESTED) {
+            global_state.has_pending_closes = true;
+            global_state.quit_request = CONFIRMABLE_CLOSE_REQUESTED;
+            request_tick_callback();
+        }
+    }
+}
 // }}}
 
 void
@@ -459,6 +490,8 @@ toggle_maximized_for_os_window(OSWindow *w) {
 
 
 #ifdef __APPLE__
+static GLFWwindow *apple_preserve_common_context = NULL;
+
 static int
 filter_option(int key UNUSED, int mods, unsigned int native_key UNUSED, unsigned long flags) {
     if ((mods == GLFW_MOD_ALT) || (mods == (GLFW_MOD_ALT | GLFW_MOD_SHIFT))) {
@@ -468,8 +501,6 @@ filter_option(int key UNUSED, int mods, unsigned int native_key UNUSED, unsigned
     return 0;
 }
 
-static GLFWwindow *application_quit_canary = NULL;
-
 static bool
 on_application_reopen(int has_visible_windows) {
     if (has_visible_windows) return true;
@@ -523,13 +554,13 @@ create_os_window(PyObject UNUSED *self, PyObject *args) {
         glfwWindowHint(GLFW_DEPTH_BITS, 0);
         glfwWindowHint(GLFW_STENCIL_BITS, 0);
         if (OPT(hide_window_decorations) & 1) glfwWindowHint(GLFW_DECORATED, false);
+        glfwSetApplicationCloseCallback(application_close_requested_callback);
 #ifdef __APPLE__
         cocoa_set_activation_policy(OPT(macos_hide_from_tasks));
         glfwWindowHint(GLFW_COCOA_GRAPHICS_SWITCHING, true);
         glfwSetApplicationShouldHandleReopen(on_application_reopen);
         glfwSetApplicationWillFinishLaunching(cocoa_create_global_menu);
 #endif
-
     }
 
 #ifndef __APPLE__
@@ -549,15 +580,13 @@ create_os_window(PyObject UNUSED *self, PyObject *args) {
     // The temp window is used to get the DPI.
     glfwWindowHint(GLFW_VISIBLE, false);
     GLFWwindow *common_context = global_state.num_os_windows ? global_state.os_windows[0].handle : NULL;
-#ifdef __APPLE__
-    if (is_first_window && !application_quit_canary) {
-        application_quit_canary = glfwCreateWindow(100, 200, "quit_canary", NULL, NULL);
-        glfwSetWindowCloseCallback(application_quit_canary, application_quit_canary_close_requested);
-    }
-    if (!common_context) common_context = application_quit_canary;
-#endif
-
     GLFWwindow *temp_window = NULL;
+#ifdef __APPLE__
+    if (!apple_preserve_common_context) {
+        apple_preserve_common_context = glfwCreateWindow(100, 200, "kitty", NULL, common_context);
+    }
+    if (!common_context) common_context = apple_preserve_common_context;
+#endif
     if (!global_state.is_wayland) {
         // On Wayland windows dont get a content scale until they receive an enterEvent anyway
         // which wont happen until the event loop ticks, so using a temp window is useless.
@@ -760,21 +789,6 @@ focus_os_window(OSWindow *w, bool also_raise) {
     }
 }
 
-#ifdef __APPLE__
-bool
-application_quit_requested() {
-    return !application_quit_canary || glfwWindowShouldClose(application_quit_canary);
-}
-
-void
-request_application_quit() {
-    if (application_quit_canary) {
-        global_state.has_pending_closes = true;
-        glfwSetWindowShouldClose(application_quit_canary, true);
-    }
-}
-#endif
-
 // Global functions {{{
 static void
 error_callback(int error, const char* description) {
@@ -979,12 +993,6 @@ wakeup_main_loop() {
     glfwPostEmptyEvent();
 }
 
-void
-mark_os_window_for_close(OSWindow* w, bool yes) {
-    global_state.has_pending_closes = true;
-    glfwSetWindowShouldClose(w->handle, yes);
-}
-
 bool
 should_os_window_be_rendered(OSWindow* w) {
     return (
@@ -994,11 +1002,6 @@ should_os_window_be_rendered(OSWindow* w) {
        ) ? false : true;
 }
 
-bool
-should_os_window_close(OSWindow* w) {
-    return glfwWindowShouldClose(w->handle) ? true : false;
-}
-
 static PyObject*
 primary_monitor_size(PYNOARG) {
     GLFWmonitor* monitor = glfwGetPrimaryMonitor();
@@ -1137,8 +1140,12 @@ wayland_frame_request_callback(id_type os_window_id) {
 
 void
 request_frame_render(OSWindow *w) {
-    glfwRequestWaylandFrameEvent(w->handle, w->id, wayland_frame_request_callback);
-    w->render_state = RENDER_FRAME_REQUESTED;
+    // Some Wayland compositors are too fragile to handle multiple
+    // render frame requests, see https://github.com/kovidgoyal/kitty/issues/2329
+    if (w->render_state != RENDER_FRAME_REQUESTED) {
+        glfwRequestWaylandFrameEvent(w->handle, w->id, wayland_frame_request_callback);
+        w->render_state = RENDER_FRAME_REQUESTED;
+    }
 }
 
 void
@@ -1183,6 +1190,10 @@ run_main_loop(tick_callback_fun cb, void* cb_data) {
 
 void
 stop_main_loop(void) {
+#ifdef __APPLE__
+    if (apple_preserve_common_context) glfwDestroyWindow(apple_preserve_common_context);
+    apple_preserve_common_context = NULL;
+#endif
     glfwStopMainLoop();
 }
 

kitty/graphics.c

@@ -939,7 +939,7 @@ static PyMethodDef methods[] = {
 };
 
 static PyMemberDef members[] = {
-    {"image_count", T_UINT, offsetof(GraphicsManager, image_count), 0, "image_count"},
+    {"image_count", T_PYSSIZET, offsetof(GraphicsManager, image_count), 0, "image_count"},
     {NULL},
 };
 

kitty/keys.c

@@ -203,8 +203,7 @@ on_key_input(GLFWkeyevent *ev) {
 }
 
 void
-fake_scroll(int amount, bool upwards) {
-    Window *w = active_window();
+fake_scroll(Window *w, int amount, bool upwards) {
     if (!w) return;
     int key = upwards ? GLFW_KEY_UP : GLFW_KEY_DOWN;
     while (amount-- > 0) {

kitty/launch.py

@@ -42,7 +42,7 @@ choices=window,tab,os-window,overlay,background,clipboard,primary
 Where to launch the child process, in a new kitty window in the current tab,
 a new tab, or a new OS window or an overlay over the current window.
 Note that if the current window already has an overlay, then it will
-open a new window. The value of none means the process will be
+open a new window. The value of background means the process will be
 run in the background. The values clipboard and primary are meant
 to work with :option:`launch --stdin-source` to copy data to the system
 clipboard or primary selection.
@@ -273,10 +273,10 @@ def launch(boss: Boss, opts: LaunchCLIOptions, args: List[str], target_tab: Opti
                     x = str(active.id)
             final_cmd.append(x)
         kw['cmd'] = final_cmd
-    if opts.type == 'overlay' and active and not active.overlay_window_id:
+    if opts.type == 'overlay' and active:
         kw['overlay_for'] = active.id
-    if opts.stdin_source and opts.stdin_source != 'none':
-        q = opts.stdin_source
+    if opts.stdin_source != 'none':
+        q = str(opts.stdin_source)
         if opts.stdin_add_formatting:
             if q in ('@screen', '@screen_scrollback', '@alternate', '@alternate_scrollback'):
                 q = '@ansi_' + q[1:]

kitty/layout/base.py

@@ -0,0 +1,405 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from functools import partial
+from itertools import repeat
+from typing import (
+    Dict, Generator, Iterable, Iterator, List, NamedTuple, Optional, Sequence,
+    Tuple, Union, cast
+)
+
+from kitty.constants import Edges, WindowGeometry
+from kitty.fast_data_types import (
+    Region, set_active_window, viewport_for_window
+)
+from kitty.options_stub import Options
+from kitty.typing import TypedDict, WindowType
+from kitty.window_list import WindowGroup, WindowList
+
+
+class Borders(NamedTuple):
+    left: bool
+    top: bool
+    right: bool
+    bottom: bool
+
+
+class LayoutOpts:
+
+    def __init__(self, data: Dict[str, str]):
+        pass
+
+
+class LayoutData(NamedTuple):
+    content_pos: int = 0
+    cells_per_window: int = 0
+    space_before: int = 0
+    space_after: int = 0
+    content_size: int = 0
+
+
+all_borders = Borders(True, True, True, True)
+no_borders = Borders(False, False, False, False)
+DecorationPairs = Sequence[Tuple[int, int]]
+LayoutDimension = Generator[LayoutData, None, None]
+ListOfWindows = List[WindowType]
+
+
+class NeighborsMap(TypedDict):
+    left: List[int]
+    top: List[int]
+    right: List[int]
+    bottom: List[int]
+
+
+class LayoutGlobalData:
+    draw_minimal_borders: bool = True
+    draw_active_borders: bool = True
+    align_top_left: bool = False
+
+    central: Region = Region((0, 0, 199, 199, 200, 200))
+    cell_width: int = 20
+    cell_height: int = 20
+
+
+lgd = LayoutGlobalData()
+
+
+def idx_for_id(win_id: int, windows: Iterable[WindowType]) -> Optional[int]:
+    for i, w in enumerate(windows):
+        if w.id == win_id:
+            return i
+
+
+def set_layout_options(opts: Options) -> None:
+    lgd.draw_minimal_borders = opts.draw_minimal_borders and sum(opts.window_margin_width) == 0
+    lgd.draw_active_borders = opts.active_border_color is not None
+    lgd.align_top_left = opts.placement_strategy == 'top-left'
+
+
+def calculate_cells_map(bias: Optional[Sequence[float]], number_of_windows: int, number_of_cells: int) -> List[int]:
+    cells_per_window = number_of_cells // number_of_windows
+    if bias is not None and 1 < number_of_windows == len(bias) and cells_per_window > 5:
+        cells_map = [int(b * number_of_cells) for b in bias]
+        while min(cells_map) < 5:
+            maxi, mini = map(cells_map.index, (max(cells_map), min(cells_map)))
+            if maxi == mini:
+                break
+            cells_map[mini] += 1
+            cells_map[maxi] -= 1
+    else:
+        cells_map = list(repeat(cells_per_window, number_of_windows))
+    extra = number_of_cells - sum(cells_map)
+    if extra > 0:
+        cells_map[-1] += extra
+    return cells_map
+
+
+def layout_dimension(
+    start_at: int, length: int, cell_length: int,
+    decoration_pairs: DecorationPairs,
+    left_align: bool = False,
+    bias: Optional[Sequence[float]] = None
+) -> LayoutDimension:
+    number_of_windows = len(decoration_pairs)
+    number_of_cells = length // cell_length
+    space_needed_for_decorations: int = sum(map(sum, decoration_pairs))
+    extra = length - number_of_cells * cell_length
+    while extra < space_needed_for_decorations:
+        number_of_cells -= 1
+        extra = length - number_of_cells * cell_length
+    cells_map = calculate_cells_map(bias, number_of_windows, number_of_cells)
+    assert sum(cells_map) == number_of_cells
+
+    extra = length - number_of_cells * cell_length - space_needed_for_decorations
+    pos = start_at
+    if not left_align:
+        pos += extra // 2
+    last_i = len(cells_map) - 1
+
+    for i, cells_per_window in enumerate(cells_map):
+        before_dec, after_dec = decoration_pairs[i]
+        pos += before_dec
+        if i == 0:
+            before_space = pos - start_at
+        else:
+            before_space = before_dec
+        content_size = cells_per_window * cell_length
+        if i == last_i:
+            after_space = (start_at + length) - (pos + content_size)
+        else:
+            after_space = after_dec
+        yield LayoutData(pos, cells_per_window, before_space, after_space, content_size)
+        pos += content_size + after_space
+
+
+class Rect(NamedTuple):
+    left: int
+    top: int
+    right: int
+    bottom: int
+
+
+def blank_rects_for_window(wg: WindowGeometry) -> Generator[Rect, None, None]:
+    left_width, right_width = wg.spaces.left, wg.spaces.right
+    top_height, bottom_height = wg.spaces.top, wg.spaces.bottom
+    if left_width > 0:
+        yield Rect(wg.left - left_width, wg.top - top_height, wg.left, wg.bottom + bottom_height)
+    if top_height > 0:
+        yield Rect(wg.left, wg.top - top_height, wg.right + right_width, wg.top)
+    if right_width > 0:
+        yield Rect(wg.right, wg.top, wg.right + right_width, wg.bottom + bottom_height)
+    if bottom_height > 0:
+        yield Rect(wg.left, wg.bottom, wg.right, wg.bottom + bottom_height)
+
+
+def window_geometry(xstart: int, xnum: int, ystart: int, ynum: int, left: int, top: int, right: int, bottom: int) -> WindowGeometry:
+    return WindowGeometry(
+        left=xstart, top=ystart, xnum=xnum, ynum=ynum,
+        right=xstart + lgd.cell_width * xnum, bottom=ystart + lgd.cell_height * ynum,
+        spaces=Edges(left, top, right, bottom)
+    )
+
+
+def window_geometry_from_layouts(x: LayoutData, y: LayoutData) -> WindowGeometry:
+    return window_geometry(x.content_pos, x.cells_per_window, y.content_pos, y.cells_per_window, x.space_before, y.space_before, x.space_after, y.space_after)
+
+
+def layout_single_window(xdecoration_pairs: DecorationPairs, ydecoration_pairs: DecorationPairs, left_align: bool = False) -> WindowGeometry:
+    x = next(layout_dimension(lgd.central.left, lgd.central.width, lgd.cell_width, xdecoration_pairs, left_align=lgd.align_top_left))
+    y = next(layout_dimension(lgd.central.top, lgd.central.height, lgd.cell_height, ydecoration_pairs, left_align=lgd.align_top_left))
+    return window_geometry_from_layouts(x, y)
+
+
+def safe_increment_bias(old_val: float, increment: float) -> float:
+    return max(0.1, min(old_val + increment, 0.9))
+
+
+def normalize_biases(biases: List[float]) -> List[float]:
+    s = sum(biases)
+    if s == 1:
+        return biases
+    return [x/s for x in biases]
+
+
+def distribute_indexed_bias(base_bias: Sequence[float], index_bias_map: Dict[int, float]) -> Sequence[float]:
+    if not index_bias_map:
+        return base_bias
+    ans = list(base_bias)
+    limit = len(ans)
+    for row, increment in index_bias_map.items():
+        if row >= limit or not increment:
+            continue
+        other_increment = -increment / (limit - 1)
+        ans = [safe_increment_bias(b, increment if i == row else other_increment) for i, b in enumerate(ans)]
+    return normalize_biases(ans)
+
+
+def variable_bias(num_windows: int, candidate: Dict[int, float]) -> Sequence[float]:
+    return distribute_indexed_bias(list(repeat(1/(num_windows), num_windows)), candidate)
+
+
+class Layout:
+
+    name: Optional[str] = None
+    needs_window_borders = True
+    must_draw_borders = False  # can be overridden to customize behavior from kittens
+    layout_opts = LayoutOpts({})
+    only_active_window_visible = False
+
+    def __init__(self, os_window_id: int, tab_id: int, layout_opts: str = '') -> None:
+        self.os_window_id = os_window_id
+        self.tab_id = tab_id
+        self.set_active_window_in_os_window = partial(set_active_window, os_window_id, tab_id)
+        # A set of rectangles corresponding to the blank spaces at the edges of
+        # this layout, i.e. spaces that are not covered by any window
+        self.blank_rects: List[Rect] = []
+        self.layout_opts = self.parse_layout_opts(layout_opts)
+        assert self.name is not None
+        self.full_name = self.name + ((':' + layout_opts) if layout_opts else '')
+        self.remove_all_biases()
+
+    def bias_increment_for_cell(self, is_horizontal: bool) -> float:
+        self._set_dimensions()
+        if is_horizontal:
+            return (lgd.cell_width + 1) / lgd.central.width
+        return (lgd.cell_height + 1) / lgd.central.height
+
+    def apply_bias(self, window_id: int, increment: float, all_windows: WindowList, is_horizontal: bool = True) -> bool:
+        return False
+
+    def remove_all_biases(self) -> bool:
+        return False
+
+    def modify_size_of_window(self, all_windows: WindowList, window_id: int, increment: float, is_horizontal: bool = True) -> bool:
+        idx = all_windows.group_idx_for_window(window_id)
+        if idx is None:
+            return False
+        return self.apply_bias(idx, increment, all_windows, is_horizontal)
+
+    def parse_layout_opts(self, layout_opts: Optional[str] = None) -> LayoutOpts:
+        data: Dict[str, str] = {}
+        if layout_opts:
+            for x in layout_opts.split(';'):
+                k, v = x.partition('=')[::2]
+                if k and v:
+                    data[k] = v
+        return type(self.layout_opts)(data)
+
+    def nth_window(self, all_windows: WindowList, num: int) -> Optional[WindowType]:
+        return all_windows.active_window_in_nth_group(num, clamp=True)
+
+    def activate_nth_window(self, all_windows: WindowList, num: int) -> None:
+        all_windows.set_active_group_idx(num)
+
+    def next_window(self, all_windows: WindowList, delta: int = 1) -> None:
+        all_windows.activate_next_window_group(delta)
+
+    def neighbors(self, all_windows: WindowList) -> NeighborsMap:
+        w = all_windows.active_window
+        assert w is not None
+        return self.neighbors_for_window(w, all_windows)
+
+    def move_window(self, all_windows: WindowList, delta: Union[str, int] = 1) -> bool:
+        # delta can be either a number or a string such as 'left', 'top', etc
+        # for neighborhood moves
+        if all_windows.num_groups < 2 or not delta:
+            return False
+
+        if isinstance(delta, int):
+            return all_windows.move_window_group(by=delta)
+        which = delta.lower()
+        which = {'up': 'top', 'down': 'bottom'}.get(which, which)
+        w = all_windows.active_window
+        if w is None:
+            return False
+        neighbors = self.neighbors_for_window(w, all_windows)
+        q: List[int] = cast(List[int], neighbors.get(which, []))
+        if not q:
+            return False
+        return all_windows.move_window_group(to_group=q[0])
+
+    def add_window(self, all_windows: WindowList, window: WindowType, location: Optional[str] = None, overlay_for: Optional[int] = None) -> None:
+        if overlay_for is not None and overlay_for in all_windows:
+            all_windows.add_window(window, group_of=overlay_for)
+            return
+        if location == 'neighbor':
+            location = 'after'
+        self.add_non_overlay_window(all_windows, window, location)
+
+    def add_non_overlay_window(self, all_windows: WindowList, window: WindowType, location: Optional[str]) -> None:
+        next_to: Optional[WindowType] = None
+        before = False
+        next_to = all_windows.active_window
+        if location is not None:
+            if location in ('after', 'vsplit', 'hsplit'):
+                pass
+            elif location == 'before':
+                before = True
+            elif location == 'first':
+                before = True
+                next_to = None
+            elif location == 'last':
+                next_to = None
+        all_windows.add_window(window, next_to=next_to, before=before)
+
+    def update_visibility(self, all_windows: WindowList) -> None:
+        active_window = all_windows.active_window
+        for window, is_group_leader in all_windows.iter_windows_with_visibility():
+            is_visible = window is active_window or (is_group_leader and not self.only_active_window_visible)
+            window.set_visible_in_layout(is_visible)
+
+    def _set_dimensions(self) -> None:
+        lgd.central, tab_bar, vw, vh, lgd.cell_width, lgd.cell_height = viewport_for_window(self.os_window_id)
+
+    def __call__(self, all_windows: WindowList) -> None:
+        self._set_dimensions()
+        self.update_visibility(all_windows)
+        self.blank_rects = []
+        self.do_layout(all_windows)
+
+    def layout_single_window_group(self, wg: WindowGroup, add_blank_rects: bool = True) -> None:
+        bw = 1 if self.must_draw_borders else 0
+        xdecoration_pairs = ((
+            wg.decoration('left', border_mult=bw, is_single_window=True),
+            wg.decoration('right', border_mult=bw, is_single_window=True),
+        ),)
+        ydecoration_pairs = ((
+            wg.decoration('top', border_mult=bw, is_single_window=True),
+            wg.decoration('bottom', border_mult=bw, is_single_window=True),
+        ),)
+        geom = layout_single_window(xdecoration_pairs, ydecoration_pairs, left_align=lgd.align_top_left)
+        wg.set_geometry(geom)
+        if add_blank_rects and wg:
+            self.blank_rects.extend(blank_rects_for_window(geom))
+
+    def xlayout(
+        self,
+        groups: Iterator[WindowGroup],
+        bias: Optional[Sequence[float]] = None,
+        start: Optional[int] = None,
+        size: Optional[int] = None,
+        offset: int = 0
+    ) -> LayoutDimension:
+        decoration_pairs = tuple(
+            (g.decoration('left'), g.decoration('right')) for i, g in
+            enumerate(groups) if i >= offset
+        )
+        if start is None:
+            start = lgd.central.left
+        if size is None:
+            size = lgd.central.width
+        return layout_dimension(start, size, lgd.cell_width, decoration_pairs, bias=bias, left_align=lgd.align_top_left)
+
+    def ylayout(
+        self,
+        groups: Iterator[WindowGroup],
+        bias: Optional[Sequence[float]] = None,
+        start: Optional[int] = None,
+        size: Optional[int] = None,
+        offset: int = 0
+    ) -> LayoutDimension:
+        decoration_pairs = tuple(
+            (g.decoration('top'), g.decoration('bottom')) for i, g in
+            enumerate(groups) if i >= offset
+        )
+        if start is None:
+            start = lgd.central.top
+        if size is None:
+            size = lgd.central.height
+        return layout_dimension(start, size, lgd.cell_height, decoration_pairs, bias=bias, left_align=lgd.align_top_left)
+
+    def set_window_group_geometry(self, wg: WindowGroup, xl: LayoutData, yl: LayoutData) -> WindowGeometry:
+        geom = window_geometry_from_layouts(xl, yl)
+        wg.set_geometry(geom)
+        self.blank_rects.extend(blank_rects_for_window(geom))
+        return geom
+
+    def do_layout(self, windows: WindowList) -> None:
+        raise NotImplementedError()
+
+    def neighbors_for_window(self, window: WindowType, windows: WindowList) -> NeighborsMap:
+        return {'left': [], 'right': [], 'top': [], 'bottom': []}
+
+    def compute_needs_borders_map(self, all_windows: WindowList) -> Dict[int, bool]:
+        return all_windows.compute_needs_borders_map(lgd.draw_active_borders)
+
+    def resolve_borders(self, all_windows: WindowList) -> Generator[Borders, None, None]:
+        if lgd.draw_minimal_borders:
+            needs_borders_map = self.compute_needs_borders_map(all_windows)
+            yield from self.minimal_borders(all_windows, needs_borders_map)
+        else:
+            for i in range(all_windows.num_groups):
+                yield all_borders
+
+    def window_independent_borders(self, windows: WindowList) -> Generator[Edges, None, None]:
+        return
+        yield Edges()  # type: ignore
+
+    def minimal_borders(self, windows: WindowList, needs_borders_map: Dict[int, bool]) -> Generator[Borders, None, None]:
+        for needs_border in needs_borders_map.values():
+            yield all_borders if needs_border else no_borders
+
+    def layout_action(self, action_name: str, args: Sequence[str], all_windows: WindowList) -> Optional[bool]:
+        pass

kitty/layout/grid.py

@@ -0,0 +1,247 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from functools import lru_cache
+from itertools import repeat
+from typing import Callable, Dict, Generator, List, Optional, Sequence, Tuple
+
+from kitty.constants import Edges
+from kitty.typing import WindowType
+from kitty.window_list import WindowGroup, WindowList
+
+from .base import (
+    Layout, LayoutData, LayoutDimension, ListOfWindows, NeighborsMap,
+    layout_dimension, lgd, variable_bias
+)
+from .tall import neighbors_for_tall_window
+
+
+@lru_cache()
+def calc_grid_size(n: int) -> Tuple[int, int, int, int]:
+    if n <= 5:
+        ncols = 1 if n == 1 else 2
+    else:
+        for ncols in range(3, (n // 2) + 1):
+            if ncols * ncols >= n:
+                break
+    nrows = n // ncols
+    special_rows = n - (nrows * (ncols - 1))
+    special_col = 0 if special_rows < nrows else ncols - 1
+    return ncols, nrows, special_rows, special_col
+
+
+class Grid(Layout):
+
+    name = 'grid'
+
+    def remove_all_biases(self) -> bool:
+        self.biased_rows: Dict[int, float] = {}
+        self.biased_cols: Dict[int, float] = {}
+        return True
+
+    def column_layout(
+        self,
+        num: int,
+        bias: Optional[Sequence[float]] = None,
+    ) -> LayoutDimension:
+        decoration_pairs = tuple(repeat((0, 0), num))
+        return layout_dimension(lgd.central.left, lgd.central.width, lgd.cell_width, decoration_pairs, bias=bias, left_align=lgd.align_top_left)
+
+    def row_layout(
+        self,
+        num: int,
+        bias: Optional[Sequence[float]] = None,
+    ) -> LayoutDimension:
+        decoration_pairs = tuple(repeat((0, 0), num))
+        return layout_dimension(lgd.central.top, lgd.central.height, lgd.cell_height, decoration_pairs, bias=bias, left_align=lgd.align_top_left)
+
+    def variable_layout(self, layout_func: Callable[..., LayoutDimension], num_windows: int, biased_map: Dict[int, float]) -> LayoutDimension:
+        return layout_func(num_windows, bias=variable_bias(num_windows, biased_map) if num_windows > 1 else None)
+
+    def apply_bias(self, idx: int, increment: float, all_windows: WindowList, is_horizontal: bool = True) -> bool:
+        b = self.biased_cols if is_horizontal else self.biased_rows
+        num_windows = all_windows.num_groups
+        ncols, nrows, special_rows, special_col = calc_grid_size(num_windows)
+
+        def position_for_window_idx(idx: int) -> Tuple[int, int]:
+            row_num = col_num = 0
+
+            def on_col_done(col_windows: List[int]) -> None:
+                nonlocal col_num, row_num
+                row_num = 0
+                col_num += 1
+
+            for window_idx, xl, yl in self.layout_windows(
+                    num_windows, nrows, ncols, special_rows, special_col, on_col_done):
+                if idx == window_idx:
+                    return row_num, col_num
+                row_num += 1
+
+        row_num, col_num = position_for_window_idx(idx)
+
+        if is_horizontal:
+            b = self.biased_cols
+            if ncols < 2:
+                return False
+            bias_idx = col_num
+            attr = 'biased_cols'
+
+            def layout_func(windows: ListOfWindows, bias: Optional[Sequence[float]] = None) -> LayoutDimension:
+                return self.column_layout(num_windows, bias=bias)
+
+        else:
+            b = self.biased_rows
+            if max(nrows, special_rows) < 2:
+                return False
+            bias_idx = row_num
+            attr = 'biased_rows'
+
+            def layout_func(windows: ListOfWindows, bias: Optional[Sequence[float]] = None) -> LayoutDimension:
+                return self.row_layout(num_windows, bias=bias)
+
+        before_layout = list(self.variable_layout(layout_func, num_windows, b))
+        candidate = b.copy()
+        before = candidate.get(bias_idx, 0)
+        candidate[bias_idx] = before + increment
+        if before_layout == list(self.variable_layout(layout_func, num_windows, candidate)):
+            return False
+        setattr(self, attr, candidate)
+        return True
+
+    def layout_windows(
+        self,
+        num_windows: int,
+        nrows: int, ncols: int,
+        special_rows: int, special_col: int,
+        on_col_done: Callable[[List[int]], None] = lambda col_windows: None
+    ) -> Generator[Tuple[int, LayoutData, LayoutData], None, None]:
+        # Distribute windows top-to-bottom, left-to-right (i.e. in columns)
+        xlayout = self.variable_layout(self.column_layout, ncols, self.biased_cols)
+        yvals_normal = tuple(self.variable_layout(self.row_layout, nrows, self.biased_rows))
+        yvals_special = yvals_normal if special_rows == nrows else tuple(self.variable_layout(self.row_layout, special_rows, self.biased_rows))
+        pos = 0
+        for col in range(ncols):
+            rows = special_rows if col == special_col else nrows
+            yls = yvals_special if col == special_col else yvals_normal
+            xl = next(xlayout)
+            col_windows = []
+            for i, yl in enumerate(yls):
+                window_idx = pos + i
+                yield window_idx, xl, yl
+                col_windows.append(window_idx)
+            pos += rows
+            on_col_done(col_windows)
+
+    def do_layout(self, all_windows: WindowList) -> None:
+        n = all_windows.num_groups
+        if n == 1:
+            self.layout_single_window_group(next(all_windows.iter_all_layoutable_groups()))
+            return
+        ncols, nrows, special_rows, special_col = calc_grid_size(n)
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        win_col_map: List[List[WindowGroup]] = []
+
+        def on_col_done(col_windows: List[int]) -> None:
+            col_windows_w = [groups[i] for i in col_windows]
+            win_col_map.append(col_windows_w)
+
+        def extents(ld: LayoutData) -> Tuple[int, int]:
+            start = ld.content_pos - ld.space_before
+            size = ld.space_before + ld.space_after + ld.content_size
+            return start, size
+
+        def layout(ld: LayoutData, cell_length: int, before_dec: int, after_dec: int) -> LayoutData:
+            start, size = extents(ld)
+            space_needed_for_decorations = before_dec + after_dec
+            content_size = size - space_needed_for_decorations
+            number_of_cells = content_size // cell_length
+            cell_area = number_of_cells * cell_length
+            extra = content_size - cell_area
+            if extra > 0 and not lgd.align_top_left:
+                before_dec += extra // 2
+            return LayoutData(start + before_dec, number_of_cells, before_dec, size - cell_area - before_dec, cell_area)
+
+        def position_window_in_grid_cell(window_idx: int, xl: LayoutData, yl: LayoutData) -> None:
+            wg = groups[window_idx]
+            edges = Edges(
+                wg.decoration('left'), wg.decoration('top'), wg.decoration('right'), wg.decoration('bottom')
+            )
+            xl = layout(xl, lgd.cell_width, edges.left, edges.right)
+            yl = layout(yl, lgd.cell_height, edges.top, edges.bottom)
+            self.set_window_group_geometry(wg, xl, yl)
+
+        for window_idx, xl, yl in self.layout_windows(
+                n, nrows, ncols, special_rows, special_col, on_col_done):
+            position_window_in_grid_cell(window_idx, xl, yl)
+
+    def window_independent_borders(self, all_windows: WindowList) -> Generator[Edges, None, None]:
+        n = all_windows.num_groups
+        if not lgd.draw_minimal_borders or n < 2:
+            return
+        ncols, nrows, special_rows, special_col = calc_grid_size(n)
+        row_borders: List[List[Edges]] = [[]]
+        col_borders: List[Edges] = []
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        bw = groups[0].effective_border()
+        xl: LayoutData = LayoutData()
+        yl: LayoutData = LayoutData()
+
+        def on_col_done(col_windows: List[int]) -> None:
+            left = xl.content_pos + xl.content_size + xl.space_after - bw // 2
+            col_borders.append(Edges(left, lgd.central.top, left + bw, lgd.central.bottom))
+            row_borders.append([])
+
+        for window_idx, xl, yl in self.layout_windows(n, nrows, ncols, special_rows, special_col, on_col_done):
+            top = yl.content_pos + yl.content_size + yl.space_after - bw // 2
+            right = xl.content_pos + xl.content_size + xl.space_after
+            row_borders[-1].append(Edges(xl.content_pos - xl.space_before, top, right, top + bw))
+
+        for border in col_borders[:-1]:
+            yield border
+
+        for rows in row_borders:
+            for border in rows[:-1]:
+                yield border
+
+    def neighbors_for_window(self, window: WindowType, all_windows: WindowList) -> NeighborsMap:
+        n = all_windows.num_groups
+        if n < 4:
+            return neighbors_for_tall_window(1, window, all_windows)
+
+        wg = all_windows.group_for_window(window)
+        assert wg is not None
+        ncols, nrows, special_rows, special_col = calc_grid_size(n)
+        blank_row: List[Optional[int]] = [None for i in range(ncols)]
+        matrix = tuple(blank_row[:] for j in range(max(nrows, special_rows)))
+        wi = all_windows.iter_all_layoutable_groups()
+        pos_map: Dict[int, Tuple[int, int]] = {}
+        col_counts: List[int] = []
+        for col in range(ncols):
+            rows = special_rows if col == special_col else nrows
+            for row in range(rows):
+                w = next(wi)
+                matrix[row][col] = wid = w.id
+                pos_map[wid] = row, col
+            col_counts.append(rows)
+        row, col = pos_map[wg.id]
+
+        def neighbors(row: int, col: int) -> List[int]:
+            try:
+                ans = matrix[row][col]
+            except IndexError:
+                ans = None
+            return [] if ans is None else [ans]
+
+        def side(row: int, col: int, delta: int) -> List[int]:
+            neighbor_col = col + delta
+            if col_counts[neighbor_col] == col_counts[col]:
+                return neighbors(row, neighbor_col)
+            return neighbors(min(row, col_counts[neighbor_col] - 1), neighbor_col)
+
+        return {
+            'top': neighbors(row-1, col) if row else [],
+            'bottom': neighbors(row + 1, col),
+            'left': side(row, col, -1) if col else [],
+            'right': side(row, col, 1) if col < ncols - 1 else [],
+        }

kitty/layout/interface.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from typing import Dict, Tuple, Type
+
+from .base import Layout
+from .grid import Grid
+from .splits import Splits
+from .stack import Stack
+from .tall import Fat, Tall
+from .vertical import Horizontal, Vertical
+
+all_layouts: Dict[str, Type[Layout]] = {
+    Stack.name: Stack,
+    Tall.name: Tall,
+    Fat.name: Fat,
+    Vertical.name: Vertical,
+    Horizontal.name: Horizontal,
+    Grid.name: Grid,
+    Splits.name: Splits,
+}
+
+
+class CreateLayoutObjectFor:
+    cache: Dict[Tuple, Layout] = {}
+
+    def __call__(
+        self,
+        name: str,
+        os_window_id: int,
+        tab_id: int,
+        layout_opts: str = ''
+    ) -> Layout:
+        key = name, os_window_id, tab_id, layout_opts
+        ans = create_layout_object_for.cache.get(key)
+        if ans is None:
+            name, layout_opts = name.partition(':')[::2]
+            ans = create_layout_object_for.cache[key] = all_layouts[name](
+                os_window_id, tab_id, layout_opts)
+        return ans
+
+
+create_layout_object_for = CreateLayoutObjectFor()
+
+
+def evict_cached_layouts(tab_id: int) -> None:
+    remove = [key for key in create_layout_object_for.cache if key[2] == tab_id]
+    for key in remove:
+        del create_layout_object_for.cache[key]

kitty/layout/splits.py

@@ -0,0 +1,454 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from typing import (
+    Collection, Dict, Generator, Optional, Sequence, Tuple, Union
+)
+
+from kitty.constants import Edges, WindowGeometry
+from kitty.typing import EdgeLiteral, WindowType
+from kitty.window_list import WindowGroup, WindowList
+
+from .base import (
+    Layout, LayoutOpts, NeighborsMap, blank_rects_for_window, lgd,
+    window_geometry_from_layouts
+)
+
+
+class Pair:
+
+    def __init__(self, horizontal: bool = True):
+        self.horizontal = horizontal
+        self.one: Optional[Union[Pair, int]] = None
+        self.two: Optional[Union[Pair, int]] = None
+        self.bias = 0.5
+        self.between_border: Optional[Edges] = None
+
+    def __repr__(self) -> str:
+        return 'Pair(horizontal={}, bias={:.2f}, one={}, two={}, between_border={})'.format(
+                self.horizontal, self.bias, self.one, self.two, self.between_border)
+
+    def all_window_ids(self) -> Generator[int, None, None]:
+        if self.one is not None:
+            if isinstance(self.one, Pair):
+                yield from self.one.all_window_ids()
+            else:
+                yield self.one
+        if self.two is not None:
+            if isinstance(self.two, Pair):
+                yield from self.two.all_window_ids()
+            else:
+                yield self.two
+
+    def self_and_descendants(self) -> Generator['Pair', None, None]:
+        yield self
+        if isinstance(self.one, Pair):
+            yield from self.one.self_and_descendants()
+        if isinstance(self.two, Pair):
+            yield from self.two.self_and_descendants()
+
+    def pair_for_window(self, window_id: int) -> Optional['Pair']:
+        if self.one == window_id or self.two == window_id:
+            return self
+        ans = None
+        if isinstance(self.one, Pair):
+            ans = self.one.pair_for_window(window_id)
+        if ans is None and isinstance(self.two, Pair):
+            ans = self.two.pair_for_window(window_id)
+        return ans
+
+    def swap_windows(self, a: int, b: int) -> None:
+        pa = self.pair_for_window(a)
+        pb = self.pair_for_window(b)
+        if pa is None or pb is None:
+            return
+        if pa.one == a:
+            if pb.one == b:
+                pa.one, pb.one = pb.one, pa.one
+            else:
+                pa.one, pb.two = pb.two, pa.one
+        else:
+            if pb.one == b:
+                pa.two, pb.one = pb.one, pa.two
+            else:
+                pa.two, pb.two = pb.two, pa.two
+
+    def parent(self, root: 'Pair') -> Optional['Pair']:
+        for q in root.self_and_descendants():
+            if q.one is self or q.two is self:
+                return q
+
+    def remove_windows(self, window_ids: Collection[int]) -> None:
+        if isinstance(self.one, int) and self.one in window_ids:
+            self.one = None
+        if isinstance(self.two, int) and self.two in window_ids:
+            self.two = None
+        if self.one is None and self.two is not None:
+            self.one, self.two = self.two, None
+
+    @property
+    def is_redundant(self) -> bool:
+        return self.one is None or self.two is None
+
+    def collapse_redundant_pairs(self) -> None:
+        while isinstance(self.one, Pair) and self.one.is_redundant:
+            self.one = self.one.one or self.one.two
+        while isinstance(self.two, Pair) and self.two.is_redundant:
+            self.two = self.two.one or self.two.two
+        if isinstance(self.one, Pair):
+            self.one.collapse_redundant_pairs()
+        if isinstance(self.two, Pair):
+            self.two.collapse_redundant_pairs()
+
+    def balanced_add(self, window_id: int) -> 'Pair':
+        if self.one is None or self.two is None:
+            if self.one is None:
+                if self.two is None:
+                    self.one = window_id
+                    return self
+                self.one, self.two = self.two, self.one
+            self.two = window_id
+            return self
+        if isinstance(self.one, Pair) and isinstance(self.two, Pair):
+            one_count = sum(1 for _ in self.one.all_window_ids())
+            two_count = sum(1 for _ in self.two.all_window_ids())
+            q = self.one if one_count < two_count else self.two
+            return q.balanced_add(window_id)
+        if not isinstance(self.one, Pair) and not isinstance(self.two, Pair):
+            pair = Pair(horizontal=self.horizontal)
+            pair.balanced_add(self.one)
+            pair.balanced_add(self.two)
+            self.one, self.two = pair, window_id
+            return self
+        if isinstance(self.one, Pair):
+            window_to_be_split = self.two
+            self.two = pair = Pair(horizontal=self.horizontal)
+        else:
+            window_to_be_split = self.one
+            self.one = pair = Pair(horizontal=self.horizontal)
+        assert isinstance(window_to_be_split, int)
+        pair.balanced_add(window_to_be_split)
+        pair.balanced_add(window_id)
+        return pair
+
+    def split_and_add(self, existing_window_id: int, new_window_id: int, horizontal: bool, after: bool) -> 'Pair':
+        q = (existing_window_id, new_window_id) if after else (new_window_id, existing_window_id)
+        if self.is_redundant:
+            pair = self
+            pair.horizontal = horizontal
+            self.one, self.two = q
+        else:
+            pair = Pair(horizontal=horizontal)
+            if self.one == existing_window_id:
+                self.one = pair
+            else:
+                self.two = pair
+            tuple(map(pair.balanced_add, q))
+        return pair
+
+    def apply_window_geometry(
+        self, window_id: int,
+        window_geometry: WindowGeometry,
+        id_window_map: Dict[int, WindowGroup],
+        layout_object: Layout
+    ) -> None:
+        wg = id_window_map[window_id]
+        wg.set_geometry(window_geometry)
+        layout_object.blank_rects.extend(blank_rects_for_window(window_geometry))
+
+    def effective_border(self, id_window_map: Dict[int, WindowGroup]) -> int:
+        for wid in self.all_window_ids():
+            return id_window_map[wid].effective_border()
+        return 0
+
+    def layout_pair(
+        self,
+        left: int, top: int, width: int, height: int,
+        id_window_map: Dict[int, WindowGroup],
+        layout_object: Layout
+    ) -> None:
+        self.between_border = None
+        if self.one is None or self.two is None:
+            q = self.one or self.two
+            if isinstance(q, Pair):
+                return q.layout_pair(left, top, width, height, id_window_map, layout_object)
+            if q is None:
+                return
+            wg = id_window_map[q]
+            xl = next(layout_object.xlayout(iter((wg,)), start=left, size=width))
+            yl = next(layout_object.ylayout(iter((wg,)), start=top, size=height))
+            geom = window_geometry_from_layouts(xl, yl)
+            self.apply_window_geometry(q, geom, id_window_map, layout_object)
+            return
+        bw = self.effective_border(id_window_map) if lgd.draw_minimal_borders else 0
+        b1 = bw // 2
+        b2 = bw - b1
+        if self.horizontal:
+            w1 = max(2*lgd.cell_width + 1, int(self.bias * width) - b1)
+            w2 = max(2*lgd.cell_width + 1, width - w1 - b1 - b2)
+            if isinstance(self.one, Pair):
+                self.one.layout_pair(left, top, w1, height, id_window_map, layout_object)
+            else:
+                wg = id_window_map[self.one]
+                yl = next(layout_object.ylayout(iter((wg,)), start=top, size=height))
+                xl = next(layout_object.xlayout(iter((wg,)), start=left, size=w1))
+                geom = window_geometry_from_layouts(xl, yl)
+                self.apply_window_geometry(self.one, geom, id_window_map, layout_object)
+            if b1 + b2:
+                self.between_border = Edges(left + w1, top, left + w1 + b1 + b2, top + height)
+            left += b1 + b2
+            if isinstance(self.two, Pair):
+                self.two.layout_pair(left + w1, top, w2, height, id_window_map, layout_object)
+            else:
+                wg = id_window_map[self.two]
+                xl = next(layout_object.xlayout(iter((wg,)), start=left + w1, size=w2))
+                yl = next(layout_object.ylayout(iter((wg,)), start=top, size=height))
+                geom = window_geometry_from_layouts(xl, yl)
+                self.apply_window_geometry(self.two, geom, id_window_map, layout_object)
+        else:
+            h1 = max(2*lgd.cell_height + 1, int(self.bias * height) - b1)
+            h2 = max(2*lgd.cell_height + 1, height - h1 - b1 - b2)
+            if isinstance(self.one, Pair):
+                self.one.layout_pair(left, top, width, h1, id_window_map, layout_object)
+            else:
+                wg = id_window_map[self.one]
+                xl = next(layout_object.xlayout(iter((wg,)), start=left, size=width))
+                yl = next(layout_object.ylayout(iter((wg,)), start=top, size=h1))
+                geom = window_geometry_from_layouts(xl, yl)
+                self.apply_window_geometry(self.one, geom, id_window_map, layout_object)
+            if b1 + b2:
+                self.between_border = Edges(left, top + h1, left + width, top + h1 + b1 + b2)
+            top += b1 + b2
+            if isinstance(self.two, Pair):
+                self.two.layout_pair(left, top + h1, width, h2, id_window_map, layout_object)
+            else:
+                wg = id_window_map[self.two]
+                xl = next(layout_object.xlayout(iter((wg,)), start=left, size=width))
+                yl = next(layout_object.ylayout(iter((wg,)), start=top + h1, size=h2))
+                geom = window_geometry_from_layouts(xl, yl)
+                self.apply_window_geometry(self.two, geom, id_window_map, layout_object)
+
+    def modify_size_of_child(self, which: int, increment: float, is_horizontal: bool, layout_object: 'Splits') -> bool:
+        if is_horizontal == self.horizontal and not self.is_redundant:
+            if which == 2:
+                increment *= -1
+            new_bias = max(0.1, min(self.bias + increment, 0.9))
+            if new_bias != self.bias:
+                self.bias = new_bias
+                return True
+            return False
+        parent = self.parent(layout_object.pairs_root)
+        if parent is not None:
+            which = 1 if parent.one is self else 2
+            return parent.modify_size_of_child(which, increment, is_horizontal, layout_object)
+        return False
+
+    def neighbors_for_window(self, window_id: int, ans: NeighborsMap, layout_object: 'Splits') -> None:
+
+        def quadrant(is_horizontal: bool, is_first: bool) -> Tuple[EdgeLiteral, EdgeLiteral]:
+            if is_horizontal:
+                if is_first:
+                    return 'left', 'right'
+                return 'right', 'left'
+            if is_first:
+                return 'top', 'bottom'
+            return 'bottom', 'top'
+
+        def extend(other: Union[int, 'Pair', None], edge: EdgeLiteral, which: EdgeLiteral) -> None:
+            if not ans[which] and other:
+                if isinstance(other, Pair):
+                    ans[which].extend(other.edge_windows(edge))
+                else:
+                    ans[which].append(other)
+
+        other = self.two if self.one == window_id else self.one
+        extend(other, *quadrant(self.horizontal, self.one == window_id))
+
+        child = self
+        while True:
+            parent = child.parent(layout_object.pairs_root)
+            if parent is None:
+                break
+            other = parent.two if child is parent.one else parent.one
+            extend(other, *quadrant(parent.horizontal, child is parent.one))
+            child = parent
+
+    def edge_windows(self, edge: str) -> Generator[int, None, None]:
+        if self.is_redundant:
+            q = self.one or self.two
+            if q:
+                if isinstance(q, Pair):
+                    yield from q.edge_windows(edge)
+                else:
+                    yield q
+        edges = ('left', 'right') if self.horizontal else ('top', 'bottom')
+        if edge in edges:
+            q = self.one if edge in ('left', 'top') else self.two
+            if q:
+                if isinstance(q, Pair):
+                    yield from q.edge_windows(edge)
+                else:
+                    yield q
+        else:
+            for q in (self.one, self.two):
+                if q:
+                    if isinstance(q, Pair):
+                        yield from q.edge_windows(edge)
+                    else:
+                        yield q
+
+
+class SplitsLayoutOpts(LayoutOpts):
+
+    default_axis_is_horizontal: bool = True
+
+    def __init__(self, data: Dict[str, str]):
+        self.default_axis_is_horizontal = data.get('split_axis', 'horizontal') == 'horizontal'
+
+
+class Splits(Layout):
+    name = 'splits'
+    needs_all_windows = True
+    layout_opts = SplitsLayoutOpts({})
+
+    @property
+    def default_axis_is_horizontal(self) -> bool:
+        return self.layout_opts.default_axis_is_horizontal
+
+    @property
+    def pairs_root(self) -> Pair:
+        root: Optional[Pair] = getattr(self, '_pairs_root', None)
+        if root is None:
+            self._pairs_root = root = Pair(horizontal=self.default_axis_is_horizontal)
+        return root
+
+    @pairs_root.setter
+    def pairs_root(self, root: Pair) -> None:
+        self._pairs_root = root
+
+    def do_layout(self, all_windows: WindowList) -> None:
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        window_count = len(groups)
+        root = self.pairs_root
+        all_present_window_ids = frozenset(w.id for w in groups)
+        already_placed_window_ids = frozenset(root.all_window_ids())
+        windows_to_remove = already_placed_window_ids - all_present_window_ids
+
+        if windows_to_remove:
+            for pair in root.self_and_descendants():
+                pair.remove_windows(windows_to_remove)
+            root.collapse_redundant_pairs()
+            if root.one is None or root.two is None:
+                q = root.one or root.two
+                if isinstance(q, Pair):
+                    root = self.pairs_root = q
+        id_window_map = {w.id: w for w in groups}
+        id_idx_map = {w.id: i for i, w in enumerate(groups)}
+        windows_to_add = all_present_window_ids - already_placed_window_ids
+        if windows_to_add:
+            for wid in sorted(windows_to_add, key=id_idx_map.__getitem__):
+                root.balanced_add(wid)
+
+        if window_count == 1:
+            self.layout_single_window_group(groups[0])
+        else:
+            root.layout_pair(lgd.central.left, lgd.central.top, lgd.central.width, lgd.central.height, id_window_map, self)
+
+    def add_non_overlay_window(
+        self,
+        all_windows: WindowList,
+        window: WindowType,
+        location: Optional[str]
+    ) -> None:
+        horizontal = self.default_axis_is_horizontal
+        after = True
+        if location is not None:
+            if location == 'vsplit':
+                horizontal = True
+            elif location == 'hsplit':
+                horizontal = False
+            if location in ('before', 'first'):
+                after = False
+        aw = all_windows.active_window
+        if aw is not None:
+            ag = all_windows.active_group
+            assert ag is not None
+            group_id = ag.id
+            pair = self.pairs_root.pair_for_window(group_id)
+            if pair is not None:
+                target_group = all_windows.add_window(window, next_to=aw, before=not after)
+                pair.split_and_add(group_id, target_group.id, horizontal, after)
+                return
+        all_windows.add_window(window)
+
+    def modify_size_of_window(
+        self,
+        all_windows: WindowList,
+        window_id: int,
+        increment: float,
+        is_horizontal: bool = True
+    ) -> bool:
+        grp = all_windows.group_for_window(window_id)
+        if grp is None:
+            return False
+        pair = self.pairs_root.pair_for_window(grp.id)
+        if pair is None:
+            return False
+        which = 1 if pair.one == grp.id else 2
+        return pair.modify_size_of_child(which, increment, is_horizontal, self)
+
+    def remove_all_biases(self) -> bool:
+        for pair in self.pairs_root.self_and_descendants():
+            pair.bias = 0.5
+        return True
+
+    def window_independent_borders(self, all_windows: WindowList) -> Generator[Edges, None, None]:
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        window_count = len(groups)
+        if not lgd.draw_minimal_borders or window_count < 2:
+            return
+        for pair in self.pairs_root.self_and_descendants():
+            if pair.between_border is not None:
+                yield pair.between_border
+
+    def neighbors_for_window(self, window: WindowType, all_windows: WindowList) -> NeighborsMap:
+        wg = all_windows.group_for_window(window)
+        assert wg is not None
+        pair = self.pairs_root.pair_for_window(wg.id)
+        ans: NeighborsMap = {'left': [], 'right': [], 'top': [], 'bottom': []}
+        if pair is not None:
+            pair.neighbors_for_window(wg.id, ans, self)
+        return ans
+
+    def move_window(self, all_windows: WindowList, delta: Union[str, int] = 1) -> bool:
+        before = all_windows.active_group
+        if before is None:
+            return False
+        before_idx = all_windows.active_group_idx
+        moved = super().move_window(all_windows, delta)
+        after = all_windows.groups[before_idx]
+        if moved and before.id != after.id:
+            self.pairs_root.swap_windows(before.id, after.id)
+        return moved
+
+    def layout_action(self, action_name: str, args: Sequence[str], all_windows: WindowList) -> Optional[bool]:
+        if action_name == 'rotate':
+            args = args or ('90',)
+            try:
+                amt = int(args[0])
+            except Exception:
+                amt = 90
+            if amt not in (90, 180, 270):
+                amt = 90
+            rotate = amt in (90, 270)
+            swap = amt in (180, 270)
+            wg = all_windows.active_group
+            if wg is not None:
+                pair = self.pairs_root.pair_for_window(wg.id)
+                if pair is not None and not pair.is_redundant:
+                    if rotate:
+                        pair.horizontal = not pair.horizontal
+                    if swap:
+                        pair.one, pair.two = pair.two, pair.one
+                    return True

kitty/layout/stack.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from kitty.window_list import WindowList
+
+from .base import Layout
+
+
+class Stack(Layout):
+
+    name = 'stack'
+    needs_window_borders = False
+    only_active_window_visible = True
+
+    def do_layout(self, all_windows: WindowList) -> None:
+        active_group = all_windows.active_group
+        for group in all_windows.iter_all_layoutable_groups():
+            self.layout_single_window_group(group, add_blank_rects=group is active_group)

kitty/layout/tall.py

@@ -0,0 +1,230 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from itertools import islice, repeat
+from typing import Dict, Generator, List, Optional, Sequence, Tuple
+
+from kitty.conf.utils import to_bool
+from kitty.typing import EdgeLiteral, WindowType
+from kitty.window_list import WindowList
+
+from .base import (
+    Borders, Layout, LayoutDimension, LayoutOpts, NeighborsMap, all_borders,
+    lgd, no_borders, normalize_biases, safe_increment_bias, variable_bias
+)
+
+
+def neighbors_for_tall_window(
+        num_full_size_windows: int,
+        window: WindowType,
+        all_windows: WindowList,
+        mirrored: bool = False,
+        main_is_horizontal: bool = True
+) -> NeighborsMap:
+    wg = all_windows.group_for_window(window)
+    assert wg is not None
+    groups = tuple(all_windows.iter_all_layoutable_groups())
+    idx = groups.index(wg)
+    prev = None if idx == 0 else groups[idx-1]
+    nxt = None if idx == len(groups) - 1 else groups[idx+1]
+    ans: NeighborsMap = {'left': [], 'right': [], 'top': [], 'bottom': []}
+    main_before: EdgeLiteral = 'left' if main_is_horizontal else 'top'
+    main_after: EdgeLiteral = 'right' if main_is_horizontal else 'bottom'
+    cross_before: EdgeLiteral = 'top' if main_is_horizontal else 'left'
+    cross_after: EdgeLiteral = 'bottom' if main_is_horizontal else 'right'
+    if mirrored:
+        main_before, main_after = main_after, main_before
+    if prev is not None:
+        ans[main_before] = [prev.id]
+    if idx < num_full_size_windows - 1:
+        if nxt is not None:
+            ans[main_after] = [nxt.id]
+    elif idx == num_full_size_windows - 1:
+        ans[main_after] = [w.id for w in groups[idx+1:]]
+    else:
+        ans[main_before] = [groups[num_full_size_windows - 1].id]
+        if idx > num_full_size_windows and prev is not None:
+            ans[cross_before] = [prev.id]
+        if nxt is not None:
+            ans[cross_after] = [nxt.id]
+    return ans
+
+
+class TallLayoutOpts(LayoutOpts):
+    bias: Tuple[float, ...] = ()
+    full_size: int = 1
+    mirrored: bool = False
+
+    def __init__(self, data: Dict[str, str]):
+        try:
+            self.full_size = int(data.get('full_size', 1))
+        except Exception:
+            self.full_size = 1
+        self.full_size = fs = max(1, min(self.full_size, 100))
+        try:
+            b = int(data.get('bias', 50)) / 100
+        except Exception:
+            b = 0.5
+        b = max(0.1, min(b, 0.9))
+        self.bias = tuple(repeat(b / fs, fs)) + (1.0 - b,)
+        self.mirrored = to_bool(data.get('mirrored', 'false'))
+
+
+class Tall(Layout):
+
+    name = 'tall'
+    main_is_horizontal = True
+    only_between_border = Borders(False, False, False, True)
+    only_main_border = Borders(False, False, True, False)
+    only_main_border_mirrored = Borders(True, False, False, False)
+    layout_opts = TallLayoutOpts({})
+    main_axis_layout = Layout.xlayout
+    perp_axis_layout = Layout.ylayout
+
+    @property
+    def num_full_size_windows(self) -> int:
+        return self.layout_opts.full_size
+
+    def remove_all_biases(self) -> bool:
+        self.main_bias: List[float] = list(self.layout_opts.bias)
+        self.biased_map: Dict[int, float] = {}
+        return True
+
+    def variable_layout(self, all_windows: WindowList, biased_map: Dict[int, float]) -> LayoutDimension:
+        num = all_windows.num_groups - self.num_full_size_windows
+        bias = variable_bias(num, biased_map) if num > 1 else None
+        return self.perp_axis_layout(all_windows.iter_all_layoutable_groups(), bias=bias, offset=self.num_full_size_windows)
+
+    def apply_bias(self, idx: int, increment: float, all_windows: WindowList, is_horizontal: bool = True) -> bool:
+        num_windows = all_windows.num_groups
+        if self.main_is_horizontal == is_horizontal:
+            before_main_bias = self.main_bias
+            ncols = self.num_full_size_windows + 1
+            biased_col = idx if idx < self.num_full_size_windows else (ncols - 1)
+            self.main_bias = [
+                safe_increment_bias(self.main_bias[i], increment * (1 if i == biased_col else -1)) for i in range(ncols)
+            ]
+            self.main_bias = normalize_biases(self.main_bias)
+            return self.main_bias != before_main_bias
+
+        num_of_short_windows = num_windows - self.num_full_size_windows
+        if idx < self.num_full_size_windows or num_of_short_windows < 2:
+            return False
+        idx -= self.num_full_size_windows
+        before_layout = list(self.variable_layout(all_windows, self.biased_map))
+        before = self.biased_map.get(idx, 0.)
+        candidate = self.biased_map.copy()
+        candidate[idx] = after = before + increment
+        if before_layout == list(self.variable_layout(all_windows, candidate)):
+            return False
+        self.biased_map = candidate
+        return before != after
+
+    def do_layout(self, all_windows: WindowList) -> None:
+        num = all_windows.num_groups
+        if num == 1:
+            self.layout_single_window_group(next(all_windows.iter_all_layoutable_groups()))
+            return
+        is_fat = not self.main_is_horizontal
+        mirrored = self.layout_opts.mirrored
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        main_bias = self.main_bias[::-1] if mirrored else self.main_bias
+        if num <= self.num_full_size_windows + 1:
+            if mirrored:
+                groups = tuple(reversed(groups))
+            if num < self.num_full_size_windows + 1:
+                main_bias = normalize_biases(main_bias[:num])
+            xlayout = self.main_axis_layout(iter(groups), bias=main_bias)
+            for wg, xl in zip(groups, xlayout):
+                yl = next(self.perp_axis_layout(iter((wg,))))
+                if is_fat:
+                    xl, yl = yl, xl
+                self.set_window_group_geometry(wg, xl, yl)
+            return
+
+        start = lgd.central.top if is_fat else lgd.central.left
+        size = 0
+        if mirrored:
+            fsg = groups[:self.num_full_size_windows + 1]
+            xlayout = self.main_axis_layout(reversed(fsg), bias=main_bias)
+            for i, wg in enumerate(reversed(fsg)):
+                xl = next(xlayout)
+                if i == 0:
+                    size = xl.content_size + xl.space_before + xl.space_after
+                    continue
+                yl = next(self.perp_axis_layout(iter((wg,))))
+                if is_fat:
+                    xl, yl = yl, xl
+                self.set_window_group_geometry(wg, xl, yl)
+        else:
+            xlayout = self.main_axis_layout(islice(groups, self.num_full_size_windows + 1), bias=main_bias)
+            attr: EdgeLiteral = 'bottom' if is_fat else 'right'
+            for i, wg in enumerate(groups):
+                if i >= self.num_full_size_windows:
+                    break
+                xl = next(xlayout)
+                yl = next(self.perp_axis_layout(iter((wg,))))
+                if is_fat:
+                    xl, yl = yl, xl
+                geom = self.set_window_group_geometry(wg, xl, yl)
+                start = getattr(geom, attr) + wg.decoration(attr)
+            size = (lgd.central.height if is_fat else lgd.central.width) - start
+
+        ylayout = self.variable_layout(all_windows, self.biased_map)
+        for i, wg in enumerate(all_windows.iter_all_layoutable_groups()):
+            if i < self.num_full_size_windows:
+                continue
+            yl = next(ylayout)
+            xl = next(self.main_axis_layout(iter((wg,)), start=start, size=size))
+            if is_fat:
+                xl, yl = yl, xl
+            self.set_window_group_geometry(wg, xl, yl)
+
+    def neighbors_for_window(self, window: WindowType, windows: WindowList) -> NeighborsMap:
+        return neighbors_for_tall_window(self.num_full_size_windows, window, windows, self.layout_opts.mirrored, self.main_is_horizontal)
+
+    def minimal_borders(self, all_windows: WindowList, needs_borders_map: Dict[int, bool]) -> Generator[Borders, None, None]:
+        mirrored = self.layout_opts.mirrored
+        only_main_border = self.only_main_border_mirrored if mirrored else self.only_main_border
+        num = all_windows.num_groups
+        last_i = num - 1
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        for i, wg in enumerate(groups):
+            if needs_borders_map[wg.id]:
+                yield all_borders
+                continue
+            if i < self.num_full_size_windows:
+                next_window_is_full_sized = last_i == i+1 or i+1 < self.num_full_size_windows
+                if next_window_is_full_sized and needs_borders_map[groups[i+1].id]:
+                    yield no_borders
+                else:
+                    yield no_borders if i == last_i else only_main_border
+                continue
+            if i == last_i:
+                yield no_borders
+                break
+            if needs_borders_map[groups[i+1].id]:
+                yield no_borders
+            else:
+                yield self.only_between_border
+
+    def layout_action(self, action_name: str, args: Sequence[str], all_windows: WindowList) -> Optional[bool]:
+        if action_name == 'increase_num_full_size_windows':
+            self.layout_opts.full_size += 1
+            return True
+        if action_name == 'decrease_num_full_size_windows':
+            if self.layout_opts.full_size > 1:
+                self.layout_opts.full_size -= 1
+                return True
+
+
+class Fat(Tall):
+
+    name = 'fat'
+    main_is_horizontal = False
+    only_between_border = Borders(False, False, True, False)
+    only_main_border = Borders(False, False, False, True)
+    only_main_border_mirrored = Borders(False, True, False, False)
+    main_axis_layout = Layout.ylayout
+    perp_axis_layout = Layout.xlayout

kitty/layout/vertical.py

@@ -0,0 +1,94 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+from typing import Dict, Generator
+
+from kitty.typing import WindowType
+from kitty.window_list import WindowList
+
+from .base import (
+    Borders, Layout, LayoutDimension, NeighborsMap, all_borders, no_borders,
+    variable_bias
+)
+
+
+class Vertical(Layout):
+
+    name = 'vertical'
+    main_is_horizontal = False
+    only_between_border = Borders(False, False, False, True)
+    main_axis_layout = Layout.ylayout
+    perp_axis_layout = Layout.xlayout
+
+    def variable_layout(self, all_windows: WindowList, biased_map: Dict[int, float]) -> LayoutDimension:
+        num_windows = all_windows.num_groups
+        bias = variable_bias(num_windows, biased_map) if num_windows else None
+        return self.main_axis_layout(all_windows.iter_all_layoutable_groups(), bias=bias)
+
+    def remove_all_biases(self) -> bool:
+        self.biased_map: Dict[int, float] = {}
+        return True
+
+    def apply_bias(self, idx: int, increment: float, all_windows: WindowList, is_horizontal: bool = True) -> bool:
+        if self.main_is_horizontal != is_horizontal:
+            return False
+        num_windows = all_windows.num_groups
+        if num_windows < 2:
+            return False
+        before_layout = list(self.variable_layout(all_windows, self.biased_map))
+        candidate = self.biased_map.copy()
+        before = candidate.get(idx, 0)
+        candidate[idx] = before + increment
+        if before_layout == list(self.variable_layout(all_windows, candidate)):
+            return False
+        self.biased_map = candidate
+        return True
+
+    def do_layout(self, all_windows: WindowList) -> None:
+        window_count = all_windows.num_groups
+        if window_count == 1:
+            self.layout_single_window_group(next(all_windows.iter_all_layoutable_groups()))
+            return
+
+        ylayout = self.variable_layout(all_windows, self.biased_map)
+        for i, (wg, yl) in enumerate(zip(all_windows.iter_all_layoutable_groups(), ylayout)):
+            xl = next(self.perp_axis_layout(iter((wg,))))
+            if self.main_is_horizontal:
+                xl, yl = yl, xl
+            self.set_window_group_geometry(wg, xl, yl)
+
+    def minimal_borders(self, all_windows: WindowList, needs_borders_map: Dict[int, bool]) -> Generator[Borders, None, None]:
+        last_i = all_windows.num_groups - 1
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        for i, wg in enumerate(groups):
+            if needs_borders_map[wg.id]:
+                yield all_borders
+                continue
+            if i == last_i:
+                yield no_borders
+                break
+            if needs_borders_map[groups[i+1].id]:
+                yield no_borders
+            else:
+                yield self.only_between_border
+
+    def neighbors_for_window(self, window: WindowType, all_windows: WindowList) -> NeighborsMap:
+        wg = all_windows.group_for_window(window)
+        assert wg is not None
+        groups = tuple(all_windows.iter_all_layoutable_groups())
+        idx = groups.index(wg)
+        before = [] if wg is groups[0] else [groups[idx-1].id]
+        after = [] if wg is groups[-1] else [groups[idx+1].id]
+        if self.main_is_horizontal:
+            return {'left': before, 'right': after, 'top': [], 'bottom': []}
+        return {'top': before, 'bottom': after, 'left': [], 'right': []}
+
+
+class Horizontal(Vertical):
+
+    name = 'horizontal'
+    main_is_horizontal = True
+    only_between_border = Borders(False, False, True, False)
+    main_axis_layout = Layout.xlayout
+    perp_axis_layout = Layout.ylayout

kitty/line.c

@@ -550,6 +550,13 @@ left_shift(Line *self, PyObject *args) {
     Py_RETURN_NONE;
 }
 
+char_type
+line_get_char(Line *self, index_type at) {
+    char_type ch = self->cpu_cells[at].ch;
+    if (!ch && at > 0 && (self->gpu_cells[at-1].attrs & WIDTH_MASK) > 1) ch = self->cpu_cells[at-1].ch;
+    return ch;
+}
+
 void
 line_set_char(Line *self, unsigned int at, uint32_t ch, unsigned int width, Cursor *cursor, bool UNUSED is_second) {
     if (cursor == NULL) {

kitty/lineops.h

@@ -54,9 +54,22 @@ line_reset_cells(Line *line, index_type start, index_type num, GPUCell *gpu_cell
     memcpy(line->cpu_cells + start, cpu_cells + start, sizeof(CPUCell) * num);
 }
 
+static inline void
+left_shift_line(Line *line, index_type at, index_type num) {
+    for (index_type i = at; i < line->xnum - num; i++) {
+        COPY_CELL(line, i + num, line, i);
+    }
+    if (at < line->xnum && ((line->gpu_cells[at].attrs) & WIDTH_MASK) != 1) {
+        line->cpu_cells[at].ch = BLANK_CHAR;
+        line->gpu_cells[at].attrs = BLANK_CHAR ? 1 : 0;
+        clear_sprite_position(line->gpu_cells[at]);
+    }
+}
+
 typedef Line*(get_line_func)(void *, int);
 void line_clear_text(Line *self, unsigned int at, unsigned int num, char_type ch);
 void line_apply_cursor(Line *self, Cursor *cursor, unsigned int at, unsigned int num, bool clear_char);
+char_type line_get_char(Line *self, index_type at);
 void line_set_char(Line *, unsigned int , uint32_t , unsigned int , Cursor *, bool);
 void line_right_shift(Line *, unsigned int , unsigned int );
 void line_add_combining_char(Line *, uint32_t , unsigned int );

kitty/main.py

@@ -7,7 +7,7 @@ import os
 import shutil
 import sys
 from contextlib import contextmanager, suppress
-from typing import Generator, List, Mapping, Optional, Tuple, Sequence
+from typing import Generator, List, Mapping, Optional, Sequence, Tuple
 
 from .borders import load_borders_program
 from .boss import Boss
@@ -15,7 +15,7 @@ from .child import set_default_env
 from .cli import create_opts, parse_args
 from .cli_stub import CLIOptions
 from .conf.utils import BadLine
-from .config import cached_values_for, initial_window_size_func, expandvars
+from .config import cached_values_for, initial_window_size_func
 from .constants import (
     appname, beam_cursor_data_file, config_dir, glfw_path, is_macos,
     is_wayland, kitty_exe, logo_data_file, running_in_kitty
@@ -29,7 +29,7 @@ from .fonts.box_drawing import set_scale
 from .fonts.render import set_font_family
 from .options_stub import Options as OptionsStub
 from .utils import (
-    detach, log_error, read_shell_environment, single_instance,
+    detach, expandvars, log_error, read_shell_environment, single_instance,
     startup_notification_handler, unix_socket_paths
 )
 from .window import load_shader_programs

kitty/marks.py

@@ -56,8 +56,8 @@ def marker_from_multiple_regex(regexes: Iterable[Tuple[int, str]], flags: int =
         for match in pat.finditer(text):
             left.value = match.start()
             right.value = match.end() - 1
-            grp = next(k for k, v in match.groupdict().items())
-            color.value = color_map[grp]
+            grp = match.lastgroup
+            color.value = color_map[grp] if grp is not None else 0
             yield
 
     return marker

kitty/monotonic.h

@@ -52,12 +52,12 @@ extern monotonic_t monotonic_(void);
 
 static inline monotonic_t
 monotonic(void) {
-	return monotonic_() - monotonic_start_time;
+    return monotonic_() - monotonic_start_time;
 }
 
 static inline void
 init_monotonic(void) {
-	monotonic_start_time = monotonic_();
+    monotonic_start_time = monotonic_();
 }
 
 #ifdef MONOTONIC_IMPLEMENTATION

kitty/mouse.c

@@ -25,27 +25,43 @@ typedef enum MouseActions { PRESS, RELEASE, DRAG, MOVE } MouseAction;
 #define ALT_INDICATOR (1 << 3)
 #define CONTROL_INDICATOR (1 << 4)
 #define MOTION_INDICATOR  (1 << 5)
-#define EXTRA_BUTTON_INDICATOR (1 << 6)
+#define SCROLL_BUTTON_INDICATOR (1 << 6)
+#define EXTRA_BUTTON_INDICATOR (1 << 7)
 
 
 static inline unsigned int
 button_map(int button) {
     switch(button) {
         case GLFW_MOUSE_BUTTON_LEFT:
-            return 0;
-        case GLFW_MOUSE_BUTTON_RIGHT:
-            return 2;
-        case GLFW_MOUSE_BUTTON_MIDDLE:
             return 1;
+        case GLFW_MOUSE_BUTTON_RIGHT:
+            return 3;
+        case GLFW_MOUSE_BUTTON_MIDDLE:
+            return 2;
         case GLFW_MOUSE_BUTTON_4:
-            return EXTRA_BUTTON_INDICATOR;
         case GLFW_MOUSE_BUTTON_5:
-            return EXTRA_BUTTON_INDICATOR | 1;
+        case GLFW_MOUSE_BUTTON_6:
+        case GLFW_MOUSE_BUTTON_7:
+        case GLFW_MOUSE_BUTTON_8:
+            return button + 5;
         default:
             return UINT_MAX;
     }
 }
 
+static inline unsigned int
+encode_button(unsigned int button) {
+    if (button >= 8 && button <= 11) {
+        return (button - 8) | EXTRA_BUTTON_INDICATOR;
+    } else if (button >= 4 && button <= 7) {
+        return (button - 4) | SCROLL_BUTTON_INDICATOR;
+    } else if (button >= 1 && button <= 3) {
+        return button - 1;
+    } else {
+        return UINT_MAX;
+    }
+}
+
 static char mouse_event_buf[64];
 
 static inline int
@@ -54,7 +70,7 @@ encode_mouse_event_impl(unsigned int x, unsigned int y, int mouse_tracking_proto
     if (action == MOVE) {
         cb = 3;
     } else {
-        cb = button_map(button);
+        cb = encode_button(button);
         if (cb == UINT_MAX) return 0;
     }
     if (action == DRAG || action == MOVE) cb |= MOTION_INDICATOR;
@@ -92,7 +108,16 @@ encode_mouse_event(Window *w, int button, MouseAction action, int mods) {
     unsigned int x = w->mouse_pos.cell_x + 1, y = w->mouse_pos.cell_y + 1; // 1 based indexing
     Screen *screen = w->render_data.screen;
     return encode_mouse_event_impl(x, y, screen->modes.mouse_tracking_protocol, button, action, mods);
+}
 
+static int
+encode_mouse_button(Window *w, int button, MouseAction action, int mods) {
+    return encode_mouse_event(w, button_map(button), action, mods);
+}
+
+static int
+encode_mouse_scroll(Window *w, bool upwards, int mods) {
+    return encode_mouse_event(w, upwards ? 4 : 5, PRESS, mods);
 }
 
 // }}}
@@ -321,7 +346,7 @@ HANDLER(handle_move_event) {
     if (OPT(focus_follows_mouse)) {
         Tab *t = global_state.callback_os_window->tabs + global_state.callback_os_window->active_tab;
         if (window_idx != t->active_window) {
-            call_boss(switch_focus_to, "I", window_idx);
+            call_boss(switch_focus_to, "K", t->windows[window_idx].id);
         }
     }
     bool in_left_half_of_cell = false;
@@ -341,7 +366,7 @@ HANDLER(handle_move_event) {
         handle_mouse_movement_in_kitty(w, button, mouse_cell_changed | cell_half_changed);
     } else {
         if (!mouse_cell_changed) return;
-        int sz = encode_mouse_event(w, MAX(0, button), button >=0 ? DRAG : MOVE, 0);
+        int sz = encode_mouse_button(w, MAX(0, button), button >=0 ? DRAG : MOVE, modifiers);
         if (sz > 0) { mouse_event_buf[sz] = 0; write_escape_code_to_child(screen, CSI, mouse_event_buf); }
     }
 }
@@ -438,7 +463,7 @@ HANDLER(handle_button_event) {
     Tab *t = global_state.callback_os_window->tabs + global_state.callback_os_window->active_tab;
     bool is_release = !global_state.callback_os_window->mouse_button_pressed[button];
     if (window_idx != t->active_window && !is_release) {
-        call_boss(switch_focus_to, "I", window_idx);
+        call_boss(switch_focus_to, "K", t->windows[window_idx].id);
     }
     Screen *screen = w->render_data.screen;
     if (!screen) return;
@@ -450,34 +475,25 @@ HANDLER(handle_button_event) {
         );
     if (handle_in_kitty) handle_button_event_in_kitty(w, button, modifiers, is_release);
     else {
-        int sz = encode_mouse_event(w, button, is_release ? RELEASE : PRESS, modifiers);
+        int sz = encode_mouse_button(w, button, is_release ? RELEASE : PRESS, modifiers);
         if (sz > 0) { mouse_event_buf[sz] = 0; write_escape_code_to_child(screen, CSI, mouse_event_buf); }
     }
 }
 
 static inline int
 currently_pressed_button(void) {
-    for (int i = 0; i < GLFW_MOUSE_BUTTON_5; i++) {
+    for (int i = 0; i <= GLFW_MOUSE_BUTTON_8; i++) {
         if (global_state.callback_os_window->mouse_button_pressed[i]) return i;
     }
     return -1;
 }
 
 HANDLER(handle_event) {
-    switch(button) {
-        case -1:
-            button = currently_pressed_button();
-            handle_move_event(w, button, modifiers, window_idx);
-            break;
-        case GLFW_MOUSE_BUTTON_LEFT:
-        case GLFW_MOUSE_BUTTON_RIGHT:
-        case GLFW_MOUSE_BUTTON_MIDDLE:
-        case GLFW_MOUSE_BUTTON_4:
-        case GLFW_MOUSE_BUTTON_5:
-            handle_button_event(w, button, modifiers, window_idx);
-            break;
-        default:
-            break;
+    if (button == -1) {
+        button = currently_pressed_button();
+        handle_move_event(w, button, modifiers, window_idx);
+    } else {
+        handle_button_event(w, button, modifiers, window_idx);
     }
 }
 
@@ -514,7 +530,8 @@ window_for_event(unsigned int *window_idx, bool *in_tab_bar) {
         Tab *t = global_state.callback_os_window->tabs + global_state.callback_os_window->active_tab;
         for (unsigned int i = 0; i < t->num_windows; i++) {
             if (contains_mouse(t->windows + i) && t->windows[i].render_data.screen) {
-                *window_idx = i; return t->windows + i;
+                *window_idx = i;
+                return t->windows + i;
             }
         }
     }
@@ -529,8 +546,10 @@ closest_window_for_event(unsigned int *window_idx) {
         Tab *t = global_state.callback_os_window->tabs + global_state.callback_os_window->active_tab;
         for (unsigned int i = 0; i < t->num_windows; i++) {
             Window *w = t->windows + i;
-            double d = distance_to_window(w);
-            if (d < closest_distance) { ans = w; closest_distance = d; *window_idx = i; }
+            if (w->visible) {
+                double d = distance_to_window(w);
+                if (d < closest_distance) { ans = w; closest_distance = d; *window_idx = i; }
+            }
         }
     }
     return ans;
@@ -610,7 +629,7 @@ mouse_event(int button, int modifiers, int action) {
 }
 
 void
-scroll_event(double UNUSED xoffset, double yoffset, int flags) {
+scroll_event(double UNUSED xoffset, double yoffset, int flags, int modifiers) {
     bool in_tab_bar;
     static id_type window_for_momentum_scroll = 0;
     static bool main_screen_for_momentum_scroll = false;
@@ -687,7 +706,7 @@ scroll_event(double UNUSED xoffset, double yoffset, int flags) {
         screen_history_scroll(screen, abs(s), upwards);
     } else {
         if (screen->modes.mouse_tracking_mode) {
-            int sz = encode_mouse_event(w, upwards ? GLFW_MOUSE_BUTTON_4 : GLFW_MOUSE_BUTTON_5, PRESS, 0);
+            int sz = encode_mouse_scroll(w, upwards, modifiers);
             if (sz > 0) {
                 mouse_event_buf[sz] = 0;
                 for (s = abs(s); s > 0; s--) {
@@ -695,7 +714,7 @@ scroll_event(double UNUSED xoffset, double yoffset, int flags) {
                 }
             }
         } else {
-            fake_scroll(abs(s), upwards);
+            fake_scroll(w, abs(s), upwards);
         }
     }
 }

kitty/multiprocessing.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2020, Kovid Goyal <kovid at kovidgoyal.net>
+
+# Monkeypatch the stdlib multiprocessing module to work with the embedded python
+# in kitty, when using the spawn launcher.
+
+
+from concurrent.futures import ProcessPoolExecutor
+from multiprocessing import util  # type: ignore
+from multiprocessing import context, get_all_start_methods, get_context, spawn
+from typing import Any, Callable, List, Optional, Tuple, Union
+
+from .constants import kitty_exe
+
+orig_spawn_passfds = util.spawnv_passfds
+orig_executable = spawn.get_executable()
+
+
+def spawnv_passfds(path: str, args: List[str], passfds: List[int]) -> Any:
+    idx = args.index('-c')
+    patched_args = [spawn.get_executable(), '+runpy'] + args[idx + 1:]
+    return orig_spawn_passfds(kitty_exe(), patched_args, passfds)
+
+
+def monkey_patch_multiprocessing() -> None:
+    # Use kitty to run the worker process used by multiprocessing
+    spawn.set_executable(kitty_exe())
+    util.spawnv_passfds = spawnv_passfds
+
+
+def unmonkey_patch_multiprocessing() -> None:
+    spawn.set_executable(orig_executable)
+    util.spawnv_passfds = orig_spawn_passfds
+
+
+def get_process_pool_executor(
+    prefer_fork: bool = False,
+    max_workers: Optional[int] = None,
+    initializer: Optional[Callable] = None,
+    initargs: Tuple[Any, ...] = ()
+) -> ProcessPoolExecutor:
+    if prefer_fork and 'fork' in get_all_start_methods():
+        ctx: Union[context.DefaultContext, context.ForkContext] = get_context('fork')
+    else:
+        monkey_patch_multiprocessing()
+        ctx = get_context()
+    try:
+        return ProcessPoolExecutor(max_workers=max_workers, initializer=initializer, initargs=initargs, mp_context=ctx)
+    except TypeError:
+        return ProcessPoolExecutor(max_workers=max_workers, initializer=initializer, initargs=initargs)
+
+
+def test_spawn() -> None:
+    monkey_patch_multiprocessing()
+    try:
+        from multiprocessing import get_context
+        ctx = get_context('spawn')
+        q = ctx.Queue()
+        p = ctx.Process(target=q.put, args=('hello',))
+        p.start()
+        x = q.get(timeout=2)
+        assert x == 'hello'
+        p.join()
+    finally:
+        unmonkey_patch_multiprocessing()