1 files changed, 154 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/content/page-worker.js b/toolkit/jetpack/sdk/content/page-worker.js
new file mode 100644
index 000000000..e9e741120
--- /dev/null
+++ b/toolkit/jetpack/sdk/content/page-worker.js
@@ -0,0 +1,154 @@
+/* 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 { frames } = require("../remote/child");
+const { Class } = require("../core/heritage");
+const { Disposable } = require('../core/disposable');
+const { data } = require("../self");
+const { once } = require("../dom/events");
+const { getAttachEventType } = require("./utils");
+const { Rules } = require('../util/rules');
+const { uuid } = require('../util/uuid');
+const { WorkerChild } = require("./worker-child");
+const { Cc, Ci, Cu } = require("chrome");
+const { observe } = require("../event/chrome");
+const { on } = require("../event/core");
+
+const appShell = Cc["@mozilla.org/appshell/appShellService;1"].getService(Ci.nsIAppShellService);
+
+const { XPCOMUtils } = require("resource://gre/modules/XPCOMUtils.jsm");
+
+const pages = new Map();
+
+const DOC_INSERTED = "document-element-inserted";
+
+function isValidURL(page, url) {
+  return !page.rules || page.rules.matchesAny(url);
+}
+
+const ChildPage = Class({
+  implements: [ Disposable ],
+  setup: function(frame, id, options) {
+    this.id = id;
+    this.frame = frame;
+    this.options = options;
+
+    this.webNav = appShell.createWindowlessBrowser(false);
+    this.docShell.allowJavascript = this.options.allow.script;
+
+    // Accessing the browser's window forces the initial about:blank document to
+    // be created before we start listening for notifications
+    this.contentWindow;
+
+    this.webProgress.addProgressListener(this, Ci.nsIWebProgress.NOTIFY_LOCATION);
+
+    pages.set(this.id, this);
+
+    this.contentURL = options.contentURL;
+
+    if (options.include) {
+      this.rules = Rules();
+      this.rules.add.apply(this.rules, [].concat(options.include));
+    }
+  },
+
+  dispose: function() {
+    pages.delete(this.id);
+    this.webProgress.removeProgressListener(this);
+    this.webNav.close();
+    this.webNav = null;
+  },
+
+  attachWorker: function() {
+    if (!isValidURL(this, this.contentWindow.location.href))
+      return;
+
+    this.options.id = uuid().toString();
+    this.options.window = this.contentWindow;
+    this.frame.port.emit("sdk/frame/connect", this.id, {
+      id: this.options.id,
+      url: this.contentWindow.document.documentURIObject.spec
+    });
+    new WorkerChild(this.options);
+  },
+
+  get docShell() {
+    return this.webNav.QueryInterface(Ci.nsIInterfaceRequestor)
+                      .getInterface(Ci.nsIDocShell);
+  },
+
+  get webProgress() {
+    return this.docShell.QueryInterface(Ci.nsIInterfaceRequestor)
+                        .getInterface(Ci.nsIWebProgress);
+  },
+
+  get contentWindow() {
+    return this.docShell.QueryInterface(Ci.nsIInterfaceRequestor)
+                        .getInterface(Ci.nsIDOMWindow);
+  },
+
+  get contentURL() {
+    return this.options.contentURL;
+  },
+  set contentURL(url) {
+    this.options.contentURL = url;
+
+    url = this.options.contentURL ? data.url(this.options.contentURL) : "about:blank";
+    this.webNav.loadURI(url, Ci.nsIWebNavigation.LOAD_FLAGS_NONE, null, null, null);
+  },
+
+  onLocationChange: function(progress, request, location, flags) {
+    // Ignore inner-frame events
+    if (progress != this.webProgress)
+      return;
+    // Ignore events that don't change the document
+    if (flags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)
+      return;
+
+    let event = getAttachEventType(this.options);
+    // Attaching at the start of the load is handled by the
+    // document-element-inserted listener.
+    if (event == DOC_INSERTED)
+      return;
+
+    once(this.contentWindow, event, () => {
+      this.attachWorker();
+    }, false);
+  },
+
+  QueryInterface: XPCOMUtils.generateQI(["nsIWebProgressListener", "nsISupportsWeakReference"])
+});
+
+on(observe(DOC_INSERTED), "data", ({ target }) => {
+  let page = Array.from(pages.values()).find(p => p.contentWindow.document === target);
+  if (!page)
+    return;
+
+  if (getAttachEventType(page.options) == DOC_INSERTED)
+    page.attachWorker();
+});
+
+frames.port.on("sdk/frame/create", (frame, id, options) => {
+  new ChildPage(frame, id, options);
+});
+
+frames.port.on("sdk/frame/set", (frame, id, params) => {
+  let page = pages.get(id);
+  if (!page)
+    return;
+
+  if ("allowScript" in params)
+    page.docShell.allowJavascript = params.allowScript;
+  if ("contentURL" in params)
+    page.contentURL = params.contentURL;
+});
+
+frames.port.on("sdk/frame/destroy", (frame, id) => {
+  let page = pages.get(id);
+  if (!page)
+    return;
+
+  page.destroy();
+});