Start work on keyboard handling

kitty/boss.py

@@ -30,6 +30,7 @@ class Boss(QObject):
         s.write_to_child.connect(self.write_to_child)
         self.term = TerminalWidget(opts, self.tracker, self.screen.linebuf, parent)
         self.term.relayout_lines.connect(self.relayout_lines)
+        self.term.send_data_to_child.connect(self.write_to_child)
         resize_pty(self.screen.columns, self.screen.lines)
 
     def apply_opts(self, opts):
@@ -46,7 +47,7 @@ class Boss(QObject):
 
     def write_ready(self, write_fd):
         while self.write_buf:
-            n = os.write(write_fd, io.DEFAULT_BUFFER_SIZE)
+            n = os.write(write_fd, self.write_buf)
             if not n:
                 return
             self.write_buf = self.write_buf[n:]

kitty/keys.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
+
+
+from PyQt5.QtCore import Qt
+
+CTRL_MASK = 0b10011111
+
+
+def key_event_to_data(ev, mods):
+    data = bytearray()
+    if mods & Qt.AltModifier:
+        data.append(27)
+    t = ev.text()
+    if t:
+        t = t.encode('utf-8')
+        if mods & Qt.ControlModifier and len(t) == 1 and 0 < t[0] & CTRL_MASK < 33:
+            data.append(t[0] & CTRL_MASK)
+        else:
+            data.extend(t)
+    return bytes(data)

kitty/screen.py

@@ -866,7 +866,7 @@ class Screen(QObject):
             elif attr in g.BG_ANSI:
                 c.bg = (attr << 8) | 1
             elif attr in g.DISPLAY:
-                attr, val = g.TEXT[attr]
+                attr, val = g.DISPLAY[attr]
                 setattr(c, attr, val)
             elif not attr:
                 c.reset_display_attrs()

kitty/term.py

@@ -13,6 +13,7 @@ from .data_types import Line, Cursor
 from .utils import set_current_font_metrics
 from .tracker import ChangeTracker
 from .screen import wrap_cursor_position
+from .keys import key_event_to_data
 
 
 def ascii_width(fm: QFontMetrics) -> int:
@@ -25,6 +26,7 @@ def ascii_width(fm: QFontMetrics) -> int:
 class TerminalWidget(QWidget):
 
     relayout_lines = pyqtSignal(object, object, object, object)
+    send_data_to_child = pyqtSignal(object)
     cells_per_line = 80
     lines_per_screen = 24
 
@@ -166,3 +168,13 @@ class TerminalWidget(QWidget):
             painter.fillRect(r, bg)
         if text.rstrip():
             painter.drawText(x, y + self.baseline_offset, text)
+
+    def keyPressEvent(self, ev):
+        mods = ev.modifiers()
+        if mods & Qt.ControlModifier and mods & Qt.ShiftModifier:
+            ev.accept()
+            return  # Terminal shortcuts
+        data = key_event_to_data(ev, mods)
+        if data:
+            self.send_data_to_child.emit(data)
+            ev.accept()