shortcut-key.ts

export class ShortcutKey {
  static readonly A = new ShortcutKey('KeyA');
  static readonly B = new ShortcutKey('KeyB');
  ...
  static readonly Digit0 = new ShortcutKey('Digit0');
  static readonly Digit1 = new ShortcutKey('Digit1');
  ...
  static readonly F1 = new ShortcutKey('F1');
  static readonly F2 = new ShortcutKey('F2');
  ...
  static readonly AltLeft = new ShortcutKey('AltLeft');
  static readonly AltRight = new ShortcutKey('AltRight');
  static readonly ShiftLeft = new ShortcutKey('ShiftLeft');
  static readonly ShiftRight = new ShortcutKey('ShiftRight');
  static readonly CtrlLeft = new ShortcutKey('ControlLeft');
  static readonly CtrlRight = new ShortcutKey('ControlRight');
  static readonly ArrowRight = new ShortcutKey('ArrowRight');
  static readonly ArrowUp = new ShortcutKey('ArrowUp');
  static readonly ArrowLeft = new ShortcutKey('ArrowLeft');
  static readonly ArrowDown = new ShortcutKey('ArrowDown');
  static readonly Delete = new ShortcutKey('Delete');
  static readonly Home = new ShortcutKey('Home');
  ...

  /**
   * The following shortcuts are for convenience. They allow to reduce registering
   * shortcuts for left and right keys on keyboard. For instance, instead of registering
   * [AltLeft, another key, ...] + [AltRight, another key, ...], you can write
   * [Alt, another key, ...], regardless which Alt key was pushed.
   */
  static readonly Alt = new ShortcutKey(['AltLeft', 'AltRight']);
  static readonly Ctrl = new ShortcutKey(['ControlLeft', 'ControlRight']);
  static readonly Shift = new ShortcutKey(['ShiftLeft', 'ShiftRight']);
  static readonly Meta = new ShortcutKey(['MetaLeft', 'MetaRight']);

  // private to disallow creating other instances of this type
  private constructor(public readonly keyCode: string | string[]) {}
}