1 files changed, 50 insertions, 0 deletions
diff --git a/toolkit/components/reader/ReaderWorker.js b/toolkit/components/reader/ReaderWorker.js
new file mode 100644
index 000000000..20023d4e0
--- /dev/null
+++ b/toolkit/components/reader/ReaderWorker.js
@@ -0,0 +1,50 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * A worker dedicated to handle parsing documents for reader view.
+ */
+
+importScripts("resource://gre/modules/workers/require.js",
+              "resource://gre/modules/reader/JSDOMParser.js",
+              "resource://gre/modules/reader/Readability.js");
+
+var PromiseWorker = require("resource://gre/modules/workers/PromiseWorker.js");
+
+const DEBUG = false;
+
+var worker = new PromiseWorker.AbstractWorker();
+worker.dispatch = function(method, args = []) {
+  return Agent[method](...args);
+};
+worker.postMessage = function(result, ...transfers) {
+  self.postMessage(result, ...transfers);
+};
+worker.close = function() {
+  self.close();
+};
+worker.log = function(...args) {
+  if (DEBUG) {
+    dump("ReaderWorker: " + args.join(" ") + "\n");
+  }
+};
+
+self.addEventListener("message", msg => worker.handleMessage(msg));
+
+var Agent = {
+  /**
+   * Parses structured article data from a document.
+   *
+   * @param {object} uri URI data for the document.
+   * @param {string} serializedDoc The serialized document.
+   *
+   * @return {object} Article object returned from Readability.
+   */
+  parseDocument: function (uri, serializedDoc) {
+    let doc = new JSDOMParser().parse(serializedDoc);
+    return new Readability(uri, doc).parse();
+  },
+};