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Add Kitty keyboard protocol support for Shift+Enter and other modifier keys

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Enable the Kitty keyboard protocol on terminal start to receive enhanced
key sequences that include modifier information. This fixes Shift+Enter
not working in Ghostty, Kitty, WezTerm, and other modern terminals.

Changes:
- Enable Kitty protocol on start (\x1b[>1u), disable on stop (\x1b[<u)
- Add centralized key definitions in packages/tui/src/keys.ts
- Support both legacy and Kitty sequences for all modifier+key combos:
  - Shift+Enter, Alt+Enter for newlines
  - Shift+Tab for thinking level cycling
  - Ctrl+C, Ctrl+A, Ctrl+E, Ctrl+K, Ctrl+U, Ctrl+W, Ctrl+O, Ctrl+P, Ctrl+T
  - Alt+Backspace for word deletion
- Export Keys constants and helper functions from @mariozechner/pi-tui
This commit is contained in:
Ahmed Kamal 2025-12-18 19:20:30 +02:00
parent 2f86c8bc3c
commit 4a4531f887
10 changed files with 182 additions and 47 deletions
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34
packages/tui/src/components/editor.ts
View file

@ -1,4 +1,5 @@
import type { AutocompleteProvider, CombinedAutocompleteProvider } from "../autocomplete.js";
import { Keys } from "../keys.js";
import type { Component } from "../tui.js";
import { visibleWidth } from "../utils.js";
import { SelectList, type SelectListTheme } from "./select-list.js";
@ -259,7 +260,8 @@ export class Editor implements Component {
// Handle special key combinations first
// Ctrl+C - Exit (let parent handle this)
if (data.charCodeAt(0) === 3) {
// Handle both raw byte (\x03) and Kitty keyboard protocol
if (data.charCodeAt(0) === 3 || data === Keys.CTRL_C) {
return;
}
@ -358,35 +360,37 @@ export class Editor implements Component {
}
// Continue with rest of input handling
// Ctrl+K - Delete to end of line
if (data.charCodeAt(0) === 11) {
// Ctrl+K - Delete to end of line (raw byte or Kitty protocol)
if (data.charCodeAt(0) === 11 || data === Keys.CTRL_K) {
this.deleteToEndOfLine();
}
// Ctrl+U - Delete to start of line
else if (data.charCodeAt(0) === 21) {
// Ctrl+U - Delete to start of line (raw byte or Kitty protocol)
else if (data.charCodeAt(0) === 21 || data === Keys.CTRL_U) {
this.deleteToStartOfLine();
}
// Ctrl+W - Delete word backwards
else if (data.charCodeAt(0) === 23) {
// Ctrl+W - Delete word backwards (raw byte or Kitty protocol)
else if (data.charCodeAt(0) === 23 || data === Keys.CTRL_W) {
this.deleteWordBackwards();
}
// Option/Alt+Backspace (e.g. Ghostty sends ESC + DEL)
else if (data === "\x1b\x7f") {
// Option/Alt+Backspace (e.g. Ghostty sends ESC + DEL, or Kitty protocol)
else if (data === "\x1b\x7f" || data === Keys.ALT_BACKSPACE) {
this.deleteWordBackwards();
}
// Ctrl+A - Move to start of line
else if (data.charCodeAt(0) === 1) {
// Ctrl+A - Move to start of line (raw byte or Kitty protocol)
else if (data.charCodeAt(0) === 1 || data === Keys.CTRL_A) {
this.moveToLineStart();
}
// Ctrl+E - Move to end of line
else if (data.charCodeAt(0) === 5) {
// Ctrl+E - Move to end of line (raw byte or Kitty protocol)
else if (data.charCodeAt(0) === 5 || data === Keys.CTRL_E) {
this.moveToLineEnd();
}
// New line shortcuts (but not plain LF/CR which should be submit)
else if (
(data.charCodeAt(0) === 10 && data.length > 1) || // Ctrl+Enter with modifiers
data === "\x1b\r" || // Option+Enter in some terminals
data === "\x1b[13;2~" || // Shift+Enter in some terminals
data === "\x1b\r" || // Option+Enter in some terminals (legacy)
data === "\x1b[13;2~" || // Shift+Enter in some terminals (legacy format)
data === Keys.SHIFT_ENTER || // Shift+Enter in Kitty keyboard protocol
data === Keys.ALT_ENTER || // Alt+Enter in Kitty keyboard protocol
(data.length > 1 && data.includes("\x1b") && data.includes("\r")) ||
(data === "\n" && data.length === 1) || // Shift+Enter from iTerm2 mapping
data === "\\\r" // Shift+Enter in VS Code terminal