1 files changed, 58 insertions, 0 deletions
diff --git a/addon-sdk/source/lib/sdk/content/tab-events.js b/addon-sdk/source/lib/sdk/content/tab-events.js
new file mode 100644
index 000000000..9e244a853
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/content/tab-events.js
@@ -0,0 +1,58 @@
+/* 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";
+
+const { Ci } = require('chrome');
+const system = require('sdk/system/events');
+const { frames } = require('sdk/remote/child');
+const { WorkerChild } = require('sdk/content/worker-child');
+
+// map observer topics to tab event names
+const EVENTS = {
+  'content-document-global-created': 'create',
+  'chrome-document-global-created': 'create',
+  'content-document-interactive': 'ready',
+  'chrome-document-interactive': 'ready',
+  'content-document-loaded': 'load',
+  'chrome-document-loaded': 'load',
+// 'content-page-shown': 'pageshow', // bug 1024105
+}
+
+function topicListener({ subject, type }) {
+  // NOTE detect the window from the subject:
+  // - on *-global-created the subject is the window
+  // - in the other cases it is the document object
+  let window = subject instanceof Ci.nsIDOMWindow ? subject : subject.defaultView;
+  if (!window){
+    return;
+  }
+  let frame = frames.getFrameForWindow(window);
+  if (frame) {
+    let readyState = frame.content.document.readyState;
+    frame.port.emit('sdk/tab/event', EVENTS[type], { readyState });
+  }
+}
+
+for (let topic in EVENTS)
+  system.on(topic, topicListener, true);
+
+// bug 1024105 - content-page-shown notification doesn't pass persisted param
+function eventListener({target, type, persisted}) {
+  let frame = this;
+  if (target === frame.content.document) {
+    frame.port.emit('sdk/tab/event', type, persisted);
+  }
+}
+frames.addEventListener('pageshow', eventListener, true);
+
+frames.port.on('sdk/tab/attach', (frame, options) => {
+  options.window = frame.content;
+  new WorkerChild(options);
+});
+
+// Forward the existent frames's readyState.
+for (let frame of frames) {
+  let readyState = frame.content.document.readyState;
+  frame.port.emit('sdk/tab/event', 'init', { readyState });
+}