ios/web/webui/resources/web_ui.js

   1 // Copyright 2014 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 // This file adheres to closure-compiler conventions in order to enable
   6 // compilation with ADVANCED_OPTIMIZATIONS. In particular, members that are to
   7 // be accessed externally should be specified in this['style'] as opposed to
   8 // this.style because member identifiers are minified by default.
   9 // See http://goo.gl/FwOgy
  10
  11 window['chrome'] = window ['chrome'] || {};
  12
  13 window['chrome']['send'] = function(message, args) {
  14   __gCrWeb.message.invokeOnHost({'command': 'chrome.send',
  15                                  'message': '' + message,
  16                                  'arguments': args || []});
  17 };
  18
  19 // Chrome defines bind on all functions, so this is expected to exist by
  20 // webui's scripts.
  21 Function.prototype.bind = function(context) {
  22   // Reference to the Function instance.
  23   var self = this;
  24   // Reference to the current arguments.
  25   var curriedArguments = [];
  26   for (var i = 1; i < arguments.length; i++)
  27     curriedArguments.push(arguments[i]);
  28   return function() {
  29     var finalArguments = [];
  30     for (var i = 0; i < curriedArguments.length; i++)
  31       finalArguments.push(curriedArguments[i]);
  32     for (var i = 0; i < arguments.length; i++)
  33       finalArguments.push(arguments[i]);
  34     return self.apply(context, finalArguments);
  35   }
  36 };
  37
  38 /**
  39  * Sends message requesting favicon at the URL from imageSet for el. Sets
  40  * favicon-url attribute on el to the favicon URL.
  41  * @param {Element} el The DOM element to request the favicon for.
  42  * @param {string} imageSet The CSS -webkit-image-set.
  43  */
  44 window['chrome']['requestFavicon'] = function(el, imageSet) {
  45   var cssUrls = imageSet.match(/url\([^\)]+\) \dx/g);
  46   // Extract url from CSS -webkit-image-set.
  47   var faviconUrl = '';
  48   for (var i = 0; i < cssUrls.length; ++i) {
  49     var scaleFactorExp = /(\d)x$/;
  50     var scaleFactor = getSupportedScaleFactors()[0];
  51     if (parseInt(scaleFactorExp.exec(cssUrls[i])[1], 10) === scaleFactor) {
  52       var urlExp = /url\(\"(.+)\"\)/;
  53       faviconUrl = urlExp.exec(cssUrls[i])[1];
  54       break;
  55     }
  56   }
  57   el.setAttribute('favicon-url', url(faviconUrl));
  58   chrome.send('webui.requestFavicon', [faviconUrl]);
  59 };
  60
  61 /**
  62  * Called to set elements with favicon-url attribute equal to faviconUrl to
  63  * provided dataUrl.
  64  * @param {string} faviconUrl Favicon URL used to locate favicon element
  65  *     via the favicon-url attribute.
  66  * @param {string} dataUrl The data URL to assign to the favicon element's
  67  *    backgroundImage.
  68  */
  69 window['chrome']['setFaviconBackground'] = function(faviconUrl, dataUrl) {
  70   var selector = "[favicon-url='" + url(faviconUrl) + "']";
  71   var elements = document.querySelectorAll(selector);
  72   for (var i = 0; i < elements.length; ++i) {
  73     elements[i].style.backgroundImage = url(dataUrl);
  74   }
  75 };