SOURCE

  /**
   * 查找字符串
   * @param content 需要查询关键字的内容
   * @param key 查找的关键字
   * @param result 不用管
   * @returns {*[]} 返回一个数组 type=1 是匹配到关键字的字符串
   */
  getHighlightStrArray (content, key, result) {
    if (result === undefined) {
      result = []
    }
    key = key.toUpperCase()
    const keyLen = key.length
    const tmp = content.toUpperCase()
    if (tmp.length >= keyLen && keyLen > 0) {
      let index = -1
      index = tmp.indexOf(key)
      if (index !== -1) {
        const text = content.substring(0, index)
        result.push({
          type: 2,
          text: text
        })
        const keyText = content.substring(index, index + keyLen)
        result.push({
          type: 1,
          text: keyText
        })
        content = content.substring(index + keyLen, content.length)
        this.getHighlightStrArray(content, key, result)
      } else {
        result.push({
          type: 2,
          text: content
        })
      }
    } else {
      result.push({
        type: 2,
        text: content
      })
    }
    return result
  }