chrome/renderer/resources/extensions/app_custom_bindings.js

   1 // Copyright (c) 2012 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 // Custom binding for the app API.
   6
   7 var GetAvailability = requireNative('v8_context').GetAvailability;
   8 if (!GetAvailability('app').is_available) {
   9   exports.chromeApp = {};
  10   exports.onInstallStateResponse = function(){};
  11   return;
  12 }
  13
  14 var appNatives = requireNative('app');
  15 var process = requireNative('process');
  16 var extensionId = process.GetExtensionId();
  17 var logActivity = requireNative('activityLogger');
  18
  19 function wrapForLogging(fun) {
  20   if (!extensionId)
  21     return fun;  // nothing interesting to log without an extension
  22
  23   return function() {
  24     // TODO(ataly): We need to make sure we use the right prototype for
  25     // fun.apply. Array slice can either be rewritten or similarly defined.
  26     logActivity.LogAPICall(extensionId, "app." + fun.name,
  27         $Array.slice(arguments));
  28     return $Function.apply(fun, this, arguments);
  29   };
  30 }
  31
  32 // This becomes chrome.app
  33 var app = {
  34   getIsInstalled: wrapForLogging(appNatives.GetIsInstalled),
  35   getDetails: wrapForLogging(appNatives.GetDetails),
  36   getDetailsForFrame: wrapForLogging(appNatives.GetDetailsForFrame),
  37   runningState: wrapForLogging(appNatives.GetRunningState)
  38 };
  39
  40 // Tricky; "getIsInstalled" is actually exposed as the getter "isInstalled",
  41 // but we don't have a way to express this in the schema JSON (nor is it
  42 // worth it for this one special case).
  43 //
  44 // So, define it manually, and let the getIsInstalled function act as its
  45 // documentation.
  46 app.__defineGetter__('isInstalled', wrapForLogging(appNatives.GetIsInstalled));
  47
  48 // Called by app_bindings.cc.
  49 function onInstallStateResponse(state, callbackId) {
  50   var callback = callbacks[callbackId];
  51   delete callbacks[callbackId];
  52   if (typeof(callback) == 'function') {
  53     try {
  54       callback(state);
  55     } catch (e) {
  56       console.error('Exception in chrome.app.installState response handler: ' +
  57                     e.stack);
  58     }
  59   }
  60 }
  61
  62 // TODO(kalman): move this stuff to its own custom bindings.
  63 var callbacks = {};
  64 var nextCallbackId = 1;
  65
  66 app.installState = function getInstallState(callback) {
  67   var callbackId = nextCallbackId++;
  68   callbacks[callbackId] = callback;
  69   appNatives.GetInstallState(callbackId);
  70 };
  71 if (extensionId)
  72   app.installState = wrapForLogging(app.installState);
  73
  74 // This must match InstallAppBindings() in
  75 // chrome/renderer/extensions/dispatcher.cc.
  76 exports.chromeApp = app;
  77 exports.onInstallStateResponse = onInstallStateResponse;