import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

mobile/android/modules/PageActions.jsm

@@ -0,0 +1,113 @@
+/* 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 { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/Messaging.jsm");
+
+XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
+                                   "@mozilla.org/uuid-generator;1",
+                                   "nsIUUIDGenerator");
+
+this.EXPORTED_SYMBOLS = ["PageActions"];
+
+// Copied from browser.js
+// TODO: We should move this method to a common importable location
+function resolveGeckoURI(aURI) {
+  if (!aURI)
+    throw "Can't resolve an empty uri";
+
+  if (aURI.startsWith("chrome://")) {
+    let registry = Cc['@mozilla.org/chrome/chrome-registry;1'].getService(Ci["nsIChromeRegistry"]);
+    return registry.convertChromeURL(Services.io.newURI(aURI, null, null)).spec;
+  } else if (aURI.startsWith("resource://")) {
+    let handler = Services.io.getProtocolHandler("resource").QueryInterface(Ci.nsIResProtocolHandler);
+    return handler.resolveURI(Services.io.newURI(aURI, null, null));
+  }
+  return aURI;
+}
+
+var PageActions = {
+  _items: { },
+
+  _inited: false,
+
+  _maybeInit: function() {
+    if (!this._inited && Object.keys(this._items).length > 0) {
+      this._inited = true;
+      Services.obs.addObserver(this, "PageActions:Clicked", false);
+      Services.obs.addObserver(this, "PageActions:LongClicked", false);
+    }
+  },
+
+  _maybeUninit: function() {
+    if (this._inited && Object.keys(this._items).length == 0) {
+      this._inited = false;
+      Services.obs.removeObserver(this, "PageActions:Clicked");
+      Services.obs.removeObserver(this, "PageActions:LongClicked");
+    }
+  },
+
+  observe: function(aSubject, aTopic, aData) {
+    let item = this._items[aData];
+    if (aTopic == "PageActions:Clicked") {
+      if (item.clickCallback) {
+        item.clickCallback();
+      }
+    } else if (aTopic == "PageActions:LongClicked") {
+      if (item.longClickCallback) {
+        item.longClickCallback();
+      }
+    }
+  },
+
+  isShown: function(id) {
+    return !!this._items[id];
+  },
+
+  synthesizeClick: function(id) {
+    let item = this._items[id];
+    if (item && item.clickCallback) {
+      item.clickCallback();
+    }
+  },
+
+  add: function(aOptions) {
+    let id = aOptions.id || uuidgen.generateUUID().toString()
+
+    Messaging.sendRequest({
+      type: "PageActions:Add",
+      id: id,
+      title: aOptions.title,
+      icon: resolveGeckoURI(aOptions.icon),
+      important: "important" in aOptions ? aOptions.important : false
+    });
+
+    this._items[id] = {};
+
+    if (aOptions.clickCallback) {
+      this._items[id].clickCallback = aOptions.clickCallback;
+    }
+
+    if (aOptions.longClickCallback) {
+      this._items[id].longClickCallback = aOptions.longClickCallback;
+    }
+
+    this._maybeInit();
+    return id;
+  },
+
+  remove: function(id) {
+    Messaging.sendRequest({
+      type: "PageActions:Remove",
+      id: id
+    });
+
+    delete this._items[id];
+    this._maybeUninit();
+  }
+}