/**
 * @file keys.ts
 * @description Keyboard helpers shared by every single-line submit field.
 * `isSubmitEnter` ignores the Enter that confirms an IME candidate (Vietnamese
 * Telex, CJK): without it a rename or commit message is committed half-typed.
 * `copyOnCtrlShiftC` makes Ctrl+Shift+C a copy, as in a Linux terminal, instead
 * of the browser's inspect-element shortcut (App.tsx installs it, capture phase).
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import type { KeyboardEvent as ReactKeyboardEvent } from "react";

/** True for a plain Enter that should submit — not Shift+Enter, not mid-IME. */
export function isSubmitEnter(e: ReactKeyboardEvent | KeyboardEvent): boolean {
  const native = "nativeEvent" in e ? e.nativeEvent : e;
  return e.key === "Enter" && !e.shiftKey && !native.isComposing && native.keyCode !== 229;
}

/**
 * Ctrl+Shift+C copies the selection — a field's, the page's or a terminal's
 * (xterm answers the `copy` event) — instead of opening DevTools. F12 and
 * Ctrl+Shift+I still open them. With nothing selected it does nothing.
 */
export function copyOnCtrlShiftC(e: KeyboardEvent): void {
  if (e.code !== "KeyC" || !e.ctrlKey || !e.shiftKey || e.altKey || e.metaKey) return;
  e.preventDefault();
  document.execCommand("copy");
}