private handleKey()

in packages/editor-core/src/hotkey.ts [487:542]
31 lines of code
14 McCabe index (conditional complexity)

  private handleKey(character: string, modifiers: string[], e: KeyboardEvent): void {
    const callbacks: IPublicTypeHotkeyCallbackConfig[] = this.getMatches(character, modifiers, e);
    let i: number;
    const doNotReset: SequenceLevels = {};
    let maxLevel = 0;
    let processedSequenceCallback = false;

    // Calculate the maxLevel for sequences so we can only execute the longest callback sequence
    for (i = 0; i < callbacks.length; ++i) {
      if (callbacks[i].seq) {
        maxLevel = Math.max(maxLevel, callbacks[i].level || 0);
      }
    }

    // loop through matching callbacks for this key event
    for (i = 0; i < callbacks.length; ++i) {
      // fire for all sequence callbacks
      // this is because if for example you have multiple sequences
      // bound such as "g i" and "g t" they both need to fire the
      // callback for matching g cause otherwise you can only ever
      // match the first one
      if (callbacks[i].seq) {
        // only fire callbacks for the maxLevel to prevent
        // subsequences from also firing
        //
        // for example 'a option b' should not cause 'option b' to fire
        // even though 'option b' is part of the other sequence
        //
        // any sequences that do not match here will be discarded
        // below by the resetSequences call
        if (callbacks[i].level !== maxLevel) {
          continue;
        }

        processedSequenceCallback = true;

        // keep a list of which sequences were matches for later
        doNotReset[callbacks[i].seq || ''] = 1;
        fireCallback(callbacks[i].callback, e, callbacks[i].combo, callbacks[i].seq);
        continue;
      }

      // if there were no sequence matches but we are still here
      // that means this is a regular match so we should fire that
      if (!processedSequenceCallback) {
        fireCallback(callbacks[i].callback, e, callbacks[i].combo);
      }
    }

    const ignoreThisKeypress = e.type === 'keypress' && this.ignoreNextKeypress;
    if (e.type === this.nextExpectedAction && !isModifier(character) && !ignoreThisKeypress) {
      this.resetSequences(doNotReset);
    }

    this.ignoreNextKeypress = processedSequenceCallback && e.type === 'keydown';
  }