Bug 1331742 - Part 3 - Create and register ext-browserAction.js r=mixedpuppy

MozReview-Commit-ID: CGR4689b6oo

--HG--
extra : rebase_source : 03a6961a6a2032048b465bc80395b4cdbe5c4cc7

mobile/android/components/extensions/ext-android.js

@@ -47,6 +47,15 @@ extensions.on("page-shutdown", (type, context) => {
 
 
 extensions.registerModules({
+  browserAction: {
+    url: "chrome://browser/content/ext-browserAction.js",
+    schema: "chrome://browser/content/schemas/browser_action.json",
+    scopes: ["addon_parent"],
+    manifest: ["browser_action"],
+    paths: [
+      ["browserAction"],
+    ],
+  },
   pageAction: {
     url: "chrome://browser/content/ext-pageAction.js",
     schema: "chrome://browser/content/schemas/page_action.json",

mobile/android/components/extensions/ext-browserAction.js

@@ -0,0 +1,78 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+XPCOMUtils.defineLazyModuleGetter(this, "EventEmitter",
+                                  "resource://devtools/shared/event-emitter.js");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Services",
+                                  "resource://gre/modules/Services.jsm");
+
+// Import the android BrowserActions module.
+XPCOMUtils.defineLazyModuleGetter(this, "BrowserActions",
+                                  "resource://gre/modules/BrowserActions.jsm");
+
+// WeakMap[Extension -> BrowserAction]
+var browserActionMap = new WeakMap();
+
+class BrowserAction {
+  constructor(options, extension) {
+    this.uuid = `{${extension.uuid}}`;
+    this.name = options.default_title || extension.name;
+    BrowserActions.register(this);
+    EventEmitter.decorate(this);
+  }
+
+  /**
+   * Required by the BrowserActions module. This event will get
+   * called whenever the browser action is clicked on.
+   */
+  onClicked() {
+    this.emit("click", tabTracker.activeTab);
+  }
+
+  /**
+   * Unregister the browser action from the BrowserActions module.
+   */
+  shutdown() {
+    BrowserActions.unregister(this.uuid);
+  }
+}
+
+this.browserAction = class extends ExtensionAPI {
+  onManifestEntry(entryName) {
+    let {extension} = this;
+    let {manifest} = extension;
+
+    let browserAction = new BrowserAction(manifest.browser_action, extension);
+    browserActionMap.set(extension, browserAction);
+  }
+
+  onShutdown(reason) {
+    let {extension} = this;
+
+    if (browserActionMap.has(extension)) {
+      browserActionMap.get(extension).shutdown();
+      browserActionMap.delete(extension);
+    }
+  }
+
+  getAPI(context) {
+    const {extension} = context;
+    const {tabManager} = extension;
+
+    return {
+      browserAction: {
+        onClicked: new SingletonEventManager(context, "browserAction.onClicked", fire => {
+          let listener = (event, tab) => {
+            fire.async(tabManager.convert(tab));
+          };
+          browserActionMap.get(extension).on("click", listener);
+          return () => {
+            browserActionMap.get(extension).off("click", listener);
+          };
+        }).api(),
+      },
+    };
+  }
+};

mobile/android/components/extensions/jar.mn

@@ -6,6 +6,7 @@ chrome.jar:
     content/ext-android.js
     content/ext-c-android.js
     content/ext-c-tabs.js
+    content/ext-browserAction.js
     content/ext-pageAction.js
     content/ext-tabs.js
     content/ext-utils.js