private getMatches()

in packages/editor-core/src/hotkey.ts [427:485]

• 37 lines of code
• 18 McCabe index (conditional complexity)

  private getMatches(
    character: string,
    modifiers: string[],
    e: KeyboardEvent | ActionEvent,
    sequenceName?: string,
    combination?: string,
    level?: number,
  ): IPublicTypeHotkeyCallbackConfig[] {
    let i: number;
    let callback: IPublicTypeHotkeyCallbackConfig;
    const matches: IPublicTypeHotkeyCallbackConfig[] = [];
    const action: string = e.type;

    // if there are no events related to this keycode
    if (!this.callBacks[character]) {
      return [];
    }

    // if a modifier key is coming up on its own we should allow it
    if (action === 'keyup' && isModifier(character)) {
      modifiers = [character];
    }

    // loop through all callbacks for the key that was pressed
    // and see if any of them match
    for (i = 0; i < this.callBacks[character].length; ++i) {
      callback = this.callBacks[character][i];

      // if a sequence name is not specified, but this is a sequence at
      // the wrong level then move onto the next match
      if (!sequenceName && callback.seq && this.sequenceLevels[callback.seq] !== callback.level) {
        continue;
      }

      // if the action we are looking for doesn't match the action we got
      // then we should keep going
      if (action !== callback.action) {
        continue;
      }

      // if this is a keypress event and the meta key and control key
      // are not pressed that means that we need to only look at the
      // character, otherwise check the modifiers as well
      //
      // chrome will not fire a keypress if meta or control is down
      // safari will fire a keypress if meta or meta+shift is down
      // firefox will fire a keypress if meta or control is down
      if ((isPressEvent(e) && !e.metaKey && !e.ctrlKey) || modifiersMatch(modifiers, callback.modifiers)) {
        const deleteCombo = !sequenceName && callback.combo === combination;
        const deleteSequence = sequenceName && callback.seq === sequenceName && callback.level === level;
        if (deleteCombo || deleteSequence) {
          this.callBacks[character].splice(i, 1);
        }

        matches.push(callback);
      }
    }
    return matches;
  }