Work on search by name in unicode input

kittens/tui/operations.py

@@ -2,6 +2,8 @@
 # vim:fileencoding=utf-8
 # License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
 
+from contextlib import contextmanager
+
 from kitty.terminfo import string_capabilities
 
 S7C1T = b'\033 F'
@@ -56,18 +58,50 @@ def set_line_wrapping(yes_or_no):
 
 STANDARD_COLORS = {name: i for i, name in enumerate(
     'black red green yellow blue magenta cyan gray'.split())}
+UNDERLINE_STYLES = {name: i + 1 for i, name in enumerate(
+    'straight double curly'.split())}
+
+
+def _color(color, intense=False, base=30):
+    if isinstance(color, str):
+        e = str((base + 60 if intense else base) + STANDARD_COLORS[color])
+    elif isinstance(color, int):
+        e = '{}:5:{}'.format(base + 8, max(0, min(color, 255)))
+    else:
+        e = '{}:2:{}:{}:{}'.format(base + 8, *color)
+    return e
 
 
 def colored(text, color, intense=False):
-    if isinstance(color, str):
-        e = (90 if intense else 30) + STANDARD_COLORS[color]
-    elif isinstance(color, int):
-        e = '38:5:{}'.format(max(0, min(color, 255)))
-    else:
-        e = '38:2:{}:{}:{}'.format(*color)
+    e = _color(color, intense)
     return '\033[{}m{}\033[39m'.format(e, text)
 
 
+def styled(text, fg=None, bg=None, fg_intense=False, bg_intense=False, italic=False, bold=False, underline=None, underline_color=None):
+    start, end = [], []
+    if fg is not None:
+        start.append(_color(fg, fg_intense))
+        end.append('39')
+    if bg is not None:
+        start.append(_color(bg, bg_intense, 40))
+        end.append('49')
+    if underline_color is not None:
+        if isinstance(underline_color, str):
+            underline_color = STANDARD_COLORS[underline_color]
+        start.append(_color(underline_color, base=50))
+        end.append('59')
+    if underline is not None:
+        start.append('4:{}'.format(UNDERLINE_STYLES[underline]))
+        end.append('4:0')
+    if italic:
+        start.append('3'), end.append('23')
+    if bold:
+        start.append('1'), end.append('21')
+    if not start:
+        return text
+    return '\033[{}m{}\033[{}m'.format(';'.join(start), text, ';'.join(end))
+
+
 def init_state(alternate_screen=True):
     ans = (
         S7C1T + SAVE_CURSOR + SAVE_PRIVATE_MODE_VALUES + reset_mode('LNM') +
@@ -92,3 +126,10 @@ def reset_state(normal_screen=True):
     ans += RESTORE_PRIVATE_MODE_VALUES
     ans += RESTORE_CURSOR
     return ans
+
+
+@contextmanager
+def cursor(write):
+    write(SAVE_CURSOR)
+    yield
+    write(RESTORE_CURSOR)

kittens/unicode_input/main.py

@@ -3,6 +3,7 @@
 # License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
 
 import sys
+from functools import lru_cache
 from gettext import gettext as _
 
 from kitty.fast_data_types import wcswidth
@@ -11,9 +12,28 @@ from kitty.key_encoding import ESCAPE, backspace_key, enter_key
 from ..tui.handler import Handler
 from ..tui.loop import Loop
 from ..tui.operations import (
-    clear_screen, colored, set_line_wrapping, set_window_title
+    clear_screen, colored, cursor, set_line_wrapping, set_window_title, styled
 )
 
+HEX, NAME = 0, 1
+
+
+@lru_cache()
+def points_for_word(w):
+    from .unicode_names import codepoints_for_word
+    return codepoints_for_word(w.lower())
+
+
+@lru_cache()
+def name(cp):
+    from .unicode_names import name_for_codepoint
+    if isinstance(cp, str):
+        cp = ord(cp[0])
+    return (name_for_codepoint(cp) or '').capitalize()
+
+
+FAINT = 242
+
 
 class UnicodeInput(Handler):
 
@@ -21,9 +41,12 @@ class UnicodeInput(Handler):
         self.current_input = ''
         self.current_char = None
         self.prompt_template = '{}> '
+        self.choice_line = ''
+        self.mode = HEX
         self.update_prompt()
 
     def update_current_char(self):
+        if self.mode is HEX:
             try:
                 code = int(self.current_input, 16)
                 if code <= 32 or code == 127 or 128 <= code <= 159:
@@ -32,13 +55,29 @@ class UnicodeInput(Handler):
                     self.current_char = chr(code)
             except Exception:
                 self.current_char = None
+        else:
+            self.current_char = None
+            parts = self.current_input.split()
+            if parts and parts[0]:
+                codepoints = points_for_word(parts[0])
+                for word in parts[1:]:
+                    pts = points_for_word(word)
+                    if pts:
+                        codepoints &= pts
+                if codepoints:
+                    codepoints = tuple(sorted(codepoints))
+                    self.current_char = chr(codepoints[0])
+                    # name_map = {c: name(c) for c in codepoints}
 
     def update_prompt(self):
         self.update_current_char()
         if self.current_char is None:
             c, color = '??', 'red'
+            self.choice_line = ''
         else:
             c, color = self.current_char, 'green'
+            self.choice_line = _('Chosen:') + ' {} ({}) {}'.format(
+                colored(c, 'green'), hex(ord(c))[2:], styled(name(c) or '', italic=True, fg=FAINT))
         w = wcswidth(c)
         self.prompt = self.prompt_template.format(colored(c, color))
         self.promt_len = w + len(self.prompt_template) - 2
@@ -51,15 +90,27 @@ class UnicodeInput(Handler):
 
     def draw_screen(self):
         self.write(clear_screen())
-        self.print(_('Enter the hex code for the unicode character'))
+        if self.mode is HEX:
+            self.print(styled(_('Press the / key to search by character name'), fg=FAINT, italic=True))
+            self.print(_('Enter the hex code for the character'))
+        else:
+            self.print(_('Enter words from the name of the character'))
         self.write(self.prompt)
         self.write(self.current_input)
+        with cursor(self.write):
+            self.print()
+            if self.choice_line:
+                self.print(self.choice_line)
+                self.print()
 
     def refresh(self):
         self.update_prompt()
         self.draw_screen()
 
     def on_text(self, text, in_bracketed_paste):
+        if self.mode is HEX and text == '/':
+            self.mode = NAME
+        else:
             self.current_input += text
         self.refresh()