Update files

2026-02-13 09:09:39 +00:00
parent 4948ba581a
commit 69f851aa14
19 changed files with 2120 additions and 28 deletions
@@ -0,0 +1,146 @@
+export interface TerminalKeyInput {
+  key: string;
+  ctrl?: boolean;
+  alt?: boolean;
+  shift?: boolean;
+  meta?: boolean;
+}
+
+function modifierParam(input: TerminalKeyInput): number {
+  let value = 1;
+  if (input.shift) value += 1;
+  if (input.alt || input.meta) value += 2;
+  if (input.ctrl) value += 4;
+  return value;
+}
+
+function applyAltLikePrefix(sequence: string, input: TerminalKeyInput): string {
+  return input.alt || input.meta ? `\x1b${sequence}` : sequence;
+}
+
+function encodePrintableKey(input: TerminalKeyInput): string {
+  const raw = input.key;
+  const char = input.shift ? raw.toUpperCase() : raw;
+
+  if (input.ctrl) {
+    const upper = char.toUpperCase();
+    if (upper.length === 1 && upper >= "A" && upper <= "Z") {
+      return applyAltLikePrefix(String.fromCharCode(upper.charCodeAt(0) - 64), input);
+    }
+    switch (char) {
+      case " ":
+      case "@":
+      case "2":
+        return applyAltLikePrefix("\x00", input);
+      case "[":
+      case "3":
+        return applyAltLikePrefix("\x1b", input);
+      case "\\":
+      case "4":
+        return applyAltLikePrefix("\x1c", input);
+      case "]":
+      case "5":
+        return applyAltLikePrefix("\x1d", input);
+      case "^":
+      case "6":
+        return applyAltLikePrefix("\x1e", input);
+      case "_":
+      case "/":
+      case "7":
+        return applyAltLikePrefix("\x1f", input);
+      case "8":
+      case "?":
+        return applyAltLikePrefix("\x7f", input);
+      default:
+        break;
+    }
+
+    if (char.length === 1) {
+      const code = char.charCodeAt(0) & 0x1f;
+      return applyAltLikePrefix(String.fromCharCode(code), input);
+    }
+  }
+
+  return applyAltLikePrefix(char, input);
+}
+
+function csiWithModifier(finalByte: string, input: TerminalKeyInput): string {
+  const mod = modifierParam(input);
+  return mod === 1 ? `\x1b[${finalByte}` : `\x1b[1;${mod}${finalByte}`;
+}
+
+function csiTilde(base: number, input: TerminalKeyInput): string {
+  const mod = modifierParam(input);
+  return mod === 1 ? `\x1b[${base}~` : `\x1b[${base};${mod}~`;
+}
+
+export function encodeTerminalKeyInput(input: TerminalKeyInput): string {
+  const key = input.key;
+  if (!key) {
+    return "";
+  }
+
+  if (key.length === 1) {
+    return encodePrintableKey(input);
+  }
+
+  switch (key) {
+    case "Enter":
+      return applyAltLikePrefix("\r", input);
+    case "Tab":
+      if (input.shift && !input.ctrl && !input.alt && !input.meta) {
+        return "\x1b[Z";
+      }
+      return applyAltLikePrefix("\t", input);
+    case "Backspace":
+      return applyAltLikePrefix("\x7f", input);
+    case "Escape":
+      return "\x1b";
+    case "ArrowUp":
+      return csiWithModifier("A", input);
+    case "ArrowDown":
+      return csiWithModifier("B", input);
+    case "ArrowRight":
+      return csiWithModifier("C", input);
+    case "ArrowLeft":
+      return csiWithModifier("D", input);
+    case "Home":
+      return csiWithModifier("H", input);
+    case "End":
+      return csiWithModifier("F", input);
+    case "Insert":
+      return csiTilde(2, input);
+    case "Delete":
+      return csiTilde(3, input);
+    case "PageUp":
+      return csiTilde(5, input);
+    case "PageDown":
+      return csiTilde(6, input);
+    case "F1":
+      return modifierParam(input) === 1 ? "\x1bOP" : csiWithModifier("P", input);
+    case "F2":
+      return modifierParam(input) === 1 ? "\x1bOQ" : csiWithModifier("Q", input);
+    case "F3":
+      return modifierParam(input) === 1 ? "\x1bOR" : csiWithModifier("R", input);
+    case "F4":
+      return modifierParam(input) === 1 ? "\x1bOS" : csiWithModifier("S", input);
+    case "F5":
+      return csiTilde(15, input);
+    case "F6":
+      return csiTilde(17, input);
+    case "F7":
+      return csiTilde(18, input);
+    case "F8":
+      return csiTilde(19, input);
+    case "F9":
+      return csiTilde(20, input);
+    case "F10":
+      return csiTilde(21, input);
+    case "F11":
+      return csiTilde(23, input);
+    case "F12":
+      return csiTilde(24, input);
+    default:
+      return "";
+  }
+}