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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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25
packages/tui/src/components/input.ts
View file

@ -1,3 +1,4 @@
import { Keys } from "../keys.js";
import type { Component } from "../tui.js";
import { visibleWidth } from "../utils.js";
@ -101,39 +102,39 @@ export class Input implements Component {
return;
}
if (data === "\x01") {
// Ctrl+A - beginning of line
if (data === "\x01" || data === Keys.CTRL_A) {
// Ctrl+A - beginning of line (raw byte or Kitty protocol)
this.cursor = 0;
return;
}
if (data === "\x05") {
// Ctrl+E - end of line
if (data === "\x05" || data === Keys.CTRL_E) {
// Ctrl+E - end of line (raw byte or Kitty protocol)
this.cursor = this.value.length;
return;
}
if (data.charCodeAt(0) === 23) {
// Ctrl+W - delete word backwards
if (data.charCodeAt(0) === 23 || data === Keys.CTRL_W) {
// Ctrl+W - delete word backwards (raw byte or Kitty protocol)
this.deleteWordBackwards();
return;
}
if (data === "\x1b\x7f") {
// Option/Alt+Backspace - delete word backwards
if (data === "\x1b\x7f" || data === Keys.ALT_BACKSPACE) {
// Option/Alt+Backspace - delete word backwards (legacy or Kitty protocol)
this.deleteWordBackwards();
return;
}
if (data.charCodeAt(0) === 21) {
// Ctrl+U - delete from cursor to start of line
if (data.charCodeAt(0) === 21 || data === Keys.CTRL_U) {
// Ctrl+U - delete from cursor to start of line (raw byte or Kitty protocol)
this.value = this.value.slice(this.cursor);
this.cursor = 0;
return;
}
if (data.charCodeAt(0) === 11) {
// Ctrl+K - delete from cursor to end of line
if (data.charCodeAt(0) === 11 || data === Keys.CTRL_K) {
// Ctrl+K - delete from cursor to end of line (raw byte or Kitty protocol)
this.value = this.value.slice(0, this.cursor);
return;
}