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| 1 // Copyright (c) 2011 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 /** | |
| 6 * @fileoverview Logic for interrogating / manipulating the local Chrome Frame | |
| 7 * installation. | |
| 8 * | |
| 9 **/ | |
| 10 goog.provide('google.cf.ChromeFrame'); | |
| 11 | |
| 12 /** | |
| 13 * Constructs an object for interacting with Chrome Frame through the provided | |
| 14 * Window instance. | |
| 15 * @constructor | |
| 16 * @param {Window=} opt_windowInstance The browser window through which to | |
| 17 * interact with Chrome Frame. Defaults to the global window object. | |
| 18 **/ | |
| 19 google.cf.ChromeFrame = function(opt_windowInstance) { | |
| 20 /** | |
| 21 * @private | |
| 22 * @const | |
| 23 * @type {!Window} | |
| 24 **/ | |
| 25 this.window_ = opt_windowInstance || window; | |
| 26 }; | |
| 27 | |
| 28 /** | |
| 29 * The name of the Chrome Frame ActiveX control. | |
| 30 * @const | |
| 31 * @type {string} | |
| 32 **/ | |
| 33 google.cf.ChromeFrame.CONTROL_NAME = 'ChromeTab.ChromeFrame'; | |
| 34 | |
| 35 /** | |
| 36 * Determines whether ChromeFrame is supported on the current platform. | |
| 37 * @return {boolean} Whether Chrome Frame is supported on the current platform. | |
| 38 */ | |
| 39 google.cf.ChromeFrame.prototype.isPlatformSupported = function() { | |
| 40 var ua = this.window_.navigator.userAgent; | |
| 41 var ieRe = /MSIE (\S+); Windows NT/; | |
| 42 | |
| 43 if (!ieRe.test(ua)) | |
| 44 return false; | |
| 45 | |
| 46 // We also only support Win2003/XPSP2 or better. See: | |
| 47 // http://msdn.microsoft.com/en-us/library/ms537503%28VS.85%29.aspx . | |
| 48 // 'SV1' indicates SP2, only bail if not SP2 or Win2K3 | |
| 49 if (parseFloat(ieRe.exec(ua)[1]) < 6 && ua.indexOf('SV1') < 0) | |
| 50 return false; | |
| 51 | |
| 52 return true; | |
| 53 }; | |
| 54 | |
| 55 /** | |
| 56 * Determines whether Chrome Frame is the currently active renderer. | |
| 57 * @return {boolean} Whether Chrome Frame is rendering the current page. | |
| 58 */ | |
| 59 google.cf.ChromeFrame.prototype.isActiveRenderer = function () { | |
| 60 return this.window_.externalHost ? true : false; | |
| 61 }; | |
| 62 | |
| 63 /** | |
| 64 * Determines if Google Chrome Frame is activated or locally available for | |
| 65 * activation in the current browser instance. In the latter case, will trigger | |
| 66 * its activation. | |
| 67 * @return {boolean} True if Google Chrome Frame already was active or was | |
| 68 * locally available (and now active). False otherwise. | |
| 69 */ | |
| 70 google.cf.ChromeFrame.prototype.activate = function() { | |
| 71 // Look for CF in the User Agent before trying more expensive checks | |
| 72 var ua = this.window_.navigator.userAgent.toLowerCase(); | |
| 73 if (ua.indexOf('chromeframe') >= 0) | |
| 74 return true; | |
| 75 | |
| 76 if (typeof this.window_['ActiveXObject'] != 'undefined') { | |
| 77 try { | |
| 78 var chromeFrame = /** @type {ChromeTab.ChromeFrame} */( | |
| 79 new this.window_.ActiveXObject(google.cf.ChromeFrame.CONTROL_NAME)); | |
| 80 if (chromeFrame) { | |
| 81 // Register the BHO if it hasn't happened already. | |
| 82 chromeFrame.registerBhoIfNeeded(); | |
| 83 return true; | |
| 84 } | |
| 85 } catch (e) { | |
| 86 // Squelch | |
| 87 } | |
| 88 } | |
| 89 return false; | |
| 90 }; | |
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Chromium Code Reviews
Issue 126143005:
Remove Chrome Frame code and resources. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src