shared getMouseModifier.ts

30% Statements 6/20

19.04% Branches 4/21

100% Functions 1/1

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  import { KeyboardBindings as kb } from '../../enums';
 
/**
 * Gets the mouse modifier key from a mouse event.
 * Supports Shift, Ctrl, Alt, in singly and in combinations of 2
 * Supports Meta singly.
 */
const getMouseModifierKey = (evt) => {
  // The logic is a hard coded key mapping
  Iif (evt.shiftKey) {
    if (evt.ctrlKey) return kb.ShiftCtrl;
    if (evt.altKey) return kb.ShiftAlt;
    if (evt.metaKey) return kb.ShiftMeta;
    return kb.Shift;
  }
  Iif (evt.ctrlKey) {
    if (evt.altKey) return kb.CtrlAlt;
    if (evt.metaKey) return kb.CtrlMeta;
    return kb.Ctrl;
  }
  Iif (evt.altKey) {
    return (evt.metaKey && kb.AltMeta) || kb.Alt;
  }
  Iif (evt.metaKey) {
    kb.Meta;
  }
  return undefined;
};
 
export default getMouseModifierKey;