* Whether this provider should be invoked for the given context.
   * If this method returns false, the providers manager won't start a query
   * with this provider, to save on resources.
   *
   * @param {UrlbarQueryContext} queryContext The query context object
   */
  async isActive(queryContext) {
    return (
      (!queryContext.restrictSource ||
        queryContext.restrictSource == UrlbarUtils.RESULT_SOURCE.BOOKMARKS) &&
      !queryContext.searchMode &&
      !!queryContext.tokens.length
    );
  }

  /**
   * Starts querying.
   *
   * @param {UrlbarQueryContext} queryContext
   * @param {(provider: UrlbarProvider, result: UrlbarResult) => void} addCallback
   *   Callback invoked by the provider to add a new result.
   */
  async startQuery(queryContext, addCallback) {
    let keyword = queryContext.tokens[0]?.value;

    let searchString = UrlbarUtils.substringAfter(
      queryContext.searchString,
      keyword
    ).trim();
    let { entry, url, postData } = await lazy.KeywordUtils.getBindableKeyword(
      keyword,
      searchString
    );
    if (!entry || !url) {
      return;
    }

    let title;
    if (entry.url.host && searchString) {
      // If we have a search string, the result has the title
      // "host: searchString".
      title = UrlbarUtils.strings.formatStringFromName(
        "bookmarkKeywordSearch",
        [
          entry.url.host,
          queryContext.tokens
            .slice(1)
            .map(t => t.value)
            .join(" "),
        ]
      );
    } else {
      title = UrlbarUtils.prepareUrlForDisplay(url);
    }

    let result = new lazy.UrlbarResult({
      type: UrlbarUtils.RESULT_TYPE.KEYWORD,
      source: UrlbarUtils.RESULT_SOURCE.BOOKMARKS,
      heuristic: true,
      payload: {
        title,
        url,
        keyword,
        input: queryContext.searchString,
        postData,
        icon: UrlbarUtils.getIconForUrl(entry.url),
      },
      highlights: {
        title: UrlbarUtils.HIGHLIGHT.TYPED,
        url: UrlbarUtils.HIGHLIGHT.TYPED,
        keyword: UrlbarUtils.HIGHLIGHT.TYPED,
      },
    });
    addCallback(this, result);
  }
}
PK