Method handleLyricActivate

js/ReadingSystem.js:429–447

* 处理歌词行激活 * @param {HTMLElement} line - 歌词行元素

(line)

   * @param {HTMLElement} line - 歌词行元素
   */
  handleLyricActivate(line) {
    // 确保元素拥有必需的数据属性
    if (!line || !line.dataset || line.dataset.index === undefined || line.dataset.time === undefined) {
      console.warn('Invalid lyric element: missing required data attributes', { element: line });
      return;
    }
    
    const index = parseInt(line.dataset.index, 10);
    const time = parseFloat(line.dataset.time);
    
    // 验证解析结果
    if (!Number.isFinite(index) || !Number.isFinite(time)) {
      console.warn('Invalid lyric data:', { index, time, element: line, dataIndex: line.dataset.index, dataTime: line.dataset.time });
      return;
    }
    
    this.playLyricAtIndex(index, time);
    this.persistPlayTime(time);
  }

  /**
   * 从指定时间播放