Parse Kitty Keyboard Protocol esc codes to suport Ctrl-Shift-<Key> shortcuts

crates/edit/src/bin/edit/main.rs

@@ -563,7 +563,7 @@ impl Drop for RestoreModes {
         // Same as in the beginning but in the reverse order.
         // It also includes DECSCUSR 0 to reset the cursor style and DECTCEM to show the cursor.
         // We specifically don't reset mode 1036, because most applications expect it to be set nowadays.
-        sys::write_stdout("\x1b[0 q\x1b[?25h\x1b]0;\x07\x1b[?1002;1006;2004l\x1b[?1049l");
+        sys::write_stdout("\x1b[<u\x1b[0 q\x1b[?25h\x1b]0;\x07\x1b[?1002;1006;2004l\x1b[?1049l");
     }
 }
 
@@ -576,7 +576,8 @@ fn setup_terminal(tui: &mut Tui, state: &mut State, vt_parser: &mut vt::Parser)
         // 1006: SGR Mouse Mode
         // 2004: Bracketed Paste Mode
         // 1036: Xterm: "meta sends escape" (Alt keypresses should be encoded with ESC + char)
-        "\x1b[?1049h\x1b[?1002;1006;2004h\x1b[?1036h",
+        // CSI u: Kitty Keyboard Protocol: Push Disambiguate escape codes flag
+        "\x1b[?1049h\x1b[?1002;1006;2004h\x1b[?1036h\x1b[>1u",
         // OSC 4 color table requests for indices 0 through 15 (base colors).
         "\x1b]4;0;?;1;?;2;?;3;?;4;?;5;?;6;?;7;?\x07",
         "\x1b]4;8;?;9;?;10;?;11;?;12;?;13;?;14;?;15;?\x07",

crates/edit/src/input.rs

@@ -449,6 +449,73 @@ impl<'input> Iterator for Stream<'_, '_, 'input> {
                             let height = (csi.params[1] as CoordType).clamp(1, 32767);
                             return Some(Input::Resize(Size { width, height }));
                         }
+                        'u' => {
+                            // Kitty keyboard events
+                            let key = match csi.params[0] {
+                                97 ..= 122 => Some(InputKey::new(csi.params[0] as u32 & !0x20)), // Shift a-z to A-Z
+                                127 => Some(vk::BACK),
+
+                                // F13-F24
+                                57376 => Some(vk::F13),
+                                57377 => Some(vk::F14),
+                                57378 => Some(vk::F15),
+                                57379 => Some(vk::F16),
+                                57380 => Some(vk::F17),
+                                57381 => Some(vk::F18),
+                                57382 => Some(vk::F19),
+                                57383 => Some(vk::F20),
+                                57384 => Some(vk::F21),
+                                57385 => Some(vk::F22),
+                                57386 => Some(vk::F23),
+                                57387 => Some(vk::F24),
+                                57388 ..= 57398 => None, // Ignore F25-F35
+
+                                // Number pad keys
+                                57399 => Some(vk::NUMPAD0),
+                                57400 => Some(vk::NUMPAD1),
+                                57401 => Some(vk::NUMPAD2),
+                                57402 => Some(vk::NUMPAD3),
+                                57403 => Some(vk::NUMPAD4),
+                                57404 => Some(vk::NUMPAD5),
+                                57405 => Some(vk::NUMPAD6),
+                                57406 => Some(vk::NUMPAD7),
+                                57407 => Some(vk::NUMPAD8),
+                                57408 => Some(vk::NUMPAD9),
+                                57409 => Some(vk::DECIMAL),
+                                57410 => Some(vk::DIVIDE),
+                                57411 => Some(vk::MULTIPLY),
+                                57412 => Some(vk::SUBTRACT),
+                                57413 => Some(vk::ADD),
+                                57414 => Some(vk::RETURN),
+                                57415 => Some(InputKey::new('=' as u32)),
+                                57416 => Some(vk::SEPARATOR),
+                                57417 => Some(vk::LEFT),
+                                57418 => Some(vk::RIGHT),
+                                57419 => Some(vk::UP),
+                                57420 => Some(vk::DOWN),
+                                57421 => Some(vk::PRIOR),
+                                57422 => Some(vk::NEXT),
+                                57423 => Some(vk::HOME),
+                                57424 => Some(vk::END),
+                                57425 => Some(vk::INSERT),
+                                57426 => Some(vk::DELETE),
+
+                                // Keys to Ignore
+                                57358 => None, // Caps Lock
+                                57359 => None, // Scroll Lock
+                                57360 => None, // Num Lock
+                                57361 => None, // Print Screen
+                                57362 => None, // Pause
+                                57363 => None, // Menu
+                                57428 ..= 57440 => None, // Media and Volume
+                                57441 ..= 57454 => None, // Left/Right Modifiers
+
+                                _ => Some(InputKey::new(csi.params[0] as u32)),
+                            }?;
+                            return Some(Input::Keyboard(
+                                key | Self::parse_modifiers(csi),
+                            ));
+                        }
                         _ => {}
                     }
                 }

crates/edit/src/tui.rs

@@ -2723,6 +2723,7 @@ impl<'a> Context<'a, '_> {
                 },
                 vk::C => match modifiers {
                     kbmod::CTRL => tb.copy(self.clipboard_mut()),
+                    kbmod::CTRL_SHIFT => tb.copy(self.clipboard_mut()),
                     _ => return false,
                 },
                 vk::V => match modifiers {