tools/memory_inspector/chrome_app/template/background.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 'use strict';
   6
   7 /**
   8  * Singleton object representing the Memory Inspector Chrome App.
   9  * @constructor
  10  */
  11 var MemoryInspectorApp = function() {
  12   this.window_ = undefined;
  13 };
  14
  15 /** Main window parameters. */
  16 MemoryInspectorApp.WINDOW_URL = 'main_window.html';
  17 MemoryInspectorApp.WINDOW_ID = 'main';
  18 MemoryInspectorApp.WINDOW_WIDTH = Math.min(screen.width, 1200);
  19 MemoryInspectorApp.WINDOW_HEIGHT = Math.min(screen.height, 800);
  20
  21 /**
  22  * Launch the Memory Inspector. If it is already running, focus the main window.
  23  */
  24 MemoryInspectorApp.prototype.launch = function() {
  25   if (this.window_ === undefined) {
  26     this.start_();
  27   } else {
  28     this.focus_();
  29   }
  30 };
  31
  32 /**
  33  * Start the Memory Inspector by creating the main window.
  34  * @private
  35  */
  36 MemoryInspectorApp.prototype.start_ = function() {
  37   var options = {
  38     'id': MemoryInspectorApp.WINDOW_ID,
  39     'bounds': {
  40       'width': MemoryInspectorApp.WINDOW_WIDTH,
  41       'height': MemoryInspectorApp.WINDOW_HEIGHT
  42     },
  43     'hidden': true  // The main window shows itself after it retrieves settings.
  44   };
  45   chrome.app.window.create(MemoryInspectorApp.WINDOW_URL, options,
  46       this.onWindowCreated_.bind(this));
  47 };
  48
  49 /**
  50  * Listener called when the main window is created.
  51  * @private
  52  * @param {AppWindow} createdWindow The created window.
  53  */
  54 MemoryInspectorApp.prototype.onWindowCreated_ = function(createdWindow) {
  55   this.window_ = createdWindow;
  56   this.window_.onClosed.addListener(this.onWindowClosed_.bind(this));
  57 };
  58
  59 /**
  60  * Listener called when the main window is closed.
  61  * @private
  62  */
  63 MemoryInspectorApp.prototype.onWindowClosed_ = function() {
  64   this.window_ = undefined;
  65 };
  66
  67 /**
  68  * Focus the main window.
  69  * @private
  70  */
  71 MemoryInspectorApp.prototype.focus_ = function() {
  72   if (this.window_ !== undefined) {
  73     this.window_.focus();
  74   }
  75 };
  76
  77 window.addEventListener('load', function() {
  78   // Create the singleton MemoryInspectorApp instance and hook it up with the
  79   // app launcher.
  80   var app = new MemoryInspectorApp();
  81   chrome.app.runtime.onLaunched.addListener(app.launch.bind(app));
  82
  83   // Make the instance global for debugging purposes.
  84   window.app = app;
  85 });
  86