tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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PageAssistChild.sys.mjs (1995B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 const lazy = {};
      6 ChromeUtils.defineESModuleGetters(lazy, {
      7  ReaderMode: "moz-src:///toolkit/components/reader/ReaderMode.sys.mjs",
      8  Readerable: "resource://gre/modules/Readerable.sys.mjs",
      9 });
     10 
     11 /**
     12 * Represents a child actor for getting page data from the browser.
     13 */
     14 export class PageAssistChild extends JSWindowActorChild {
     15  async receiveMessage(message) {
     16    switch (message.name) {
     17      case "PageAssist:FetchPageData":
     18        return this.getPageData();
     19    }
     20 
     21    //expected a return value.  consistent-return (eslint)
     22    return undefined;
     23  }
     24 
     25  /**
     26   * Fetches and returns page data including URL, title, content, text content, excerpt, and reader mode status.
     27   *
     28   * @returns {Promise<{
     29   *  url: string,
     30   *  title: string,
     31   *  content: string,
     32   *  textContent: string,
     33   *  excerpt: string,
     34   *  isReaderable: boolean
     35   * } | null>}
     36   */
     37  async getPageData() {
     38    try {
     39      const doc = this.contentWindow.document;
     40      if (
     41        !lazy.Readerable.shouldCheckUri(doc.documentURIObject) ||
     42        !lazy.Readerable.isProbablyReaderable(doc)
     43      ) {
     44        return {
     45          url: this.contentWindow.location.href,
     46          title: doc.title || "",
     47          content: "",
     48          textContent: "",
     49          excerpt: "",
     50          isReaderable: false,
     51        };
     52      }
     53 
     54      const article = await lazy.ReaderMode.parseDocument(doc);
     55 
     56      return {
     57        url: this.contentWindow.location.href,
     58        title: article?.title || doc.title || "",
     59        content: article?.content || "",
     60        textContent: article?.textContent || doc.body?.innerText || "",
     61        excerpt: article?.excerpt || "",
     62        isReaderable: !!article,
     63      };
     64    } catch (e) {
     65      console.error("Error fetching page data:", e);
     66      return null;
     67    }
     68  }
     69 }