The Tor Browser / file revision

 /* 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/. */

 const Cc = Components.classes;

 const Ci = Components.interfaces;

 const Cu = Components.utils;

 const Cr = Components.results;

 Cu.import("resource://gre/modules/XPCOMUtils.jsm");

 Cu.import("resource://gre/modules/Services.jsm");

 function MetroUIUtils() {

 }

 const URLElements = {

   "a": "href",

   "applet": ["archive", "code", "codebase"],

   "area": "href",

   "audio": "src",

   "base": "href",

   "blockquote": ["cite"],

   "body": "background",

   "button": "formaction",

   "command": "icon",

   "del": ["cite"],

   "embed": "src",

   "form": "action",

   "frame": ["longdesc", "src"],

   "iframe": ["longdesc", "src"],

   "img": ["longdesc", "src"],

   "input": ["formaction", "src"],

   "ins": ["cite"],

   "link": "href",

   "object": ["archive", "codebase", "data"],

   "q": ["cite"],

   "script": "src",

   "source": "src",

 };

 MetroUIUtils.prototype = {

   classID : Components.ID("e4626085-17f7-4068-a225-66c1acc0485c"),

   QueryInterface : XPCOMUtils.generateQI([Ci.nsIMetroUIUtils]),

   /**

    * Loads the specified panel in the browser.

    * @ param aPanelId The identifier of the pane to load

   */

   showPanel: function(aPanelId) {

     let browserWin = Services.wm.getMostRecentWindow("navigator:browser");

     browserWin.PanelUI.show(aPanelId);

   },

   /**

    * Determines if the browser has selected content

   */

   get hasSelectedContent() {

     try {

       let browserWin = Services.wm.getMostRecentWindow("navigator:browser");

       let tabBrowser = browserWin.getBrowser();

       if (!browserWin || !tabBrowser || !tabBrowser.contentWindow) {

         return false;

       }

       let sel = tabBrowser.contentWindow.getSelection();

       return sel && sel.toString();

     } catch(e) {

       return false;

     }

   },

   /**

    * Obtains the current page title

   */

   get currentPageTitle() {

     let browserWin = Services.wm.getMostRecentWindow("navigator:browser");

     if (!browserWin || !browserWin.content || !browserWin.content.document) {

       throw Cr.NS_ERROR_FAILURE;

     }

     return browserWin.content.document.title || "";

   },

   /**

    * Obtains the current page URI

   */

   get currentPageURI() {

     let browserWin = Services.wm.getMostRecentWindow("navigator:browser");

     if (!browserWin || !browserWin.content || !browserWin.content.document) {

       throw Cr.NS_ERROR_FAILURE;

     }

     return browserWin.content.document.URL || "";

   },

   /**

    * Determines the text that should be shared

   */

   get shareText() {

     let browserWin = Services.wm.getMostRecentWindow("navigator:browser");

     let tabBrowser = browserWin.getBrowser();

     if (browserWin && tabBrowser && tabBrowser.contentWindow) {

       let sel = tabBrowser.contentWindow.getSelection();

       if (sel && sel.rangeCount)

         return sel;

     }

     throw Cr.NS_ERROR_FAILURE;

   },

   /**

    * Replaces the node's attribute value to be a fully qualified URL

   */

   _expandAttribute : function(ioService, doc, node, attrName) {

     let attrValue = node.getAttribute(attrName);

     if (!attrValue)

       return;

     try {

       let uri = ioService.newURI(attrValue, null, doc.baseURIObject);

       node.setAttribute(attrName, uri.spec);

     } catch (e) {

     }

   },

   /*

    * Replaces all attribute values in 'n' which contain URLs recursiely

    * to fully qualified URLs.

   */

   _expandURLs: function(doc, n) {

     let ioService = Cc["@mozilla.org/network/io-service;1"].

                     getService(Ci.nsIIOService);

     for (let i = 0; i < n.children.length; i++) {

       let child = n.children[i];

       let childTagName = child.tagName.toLowerCase();

       // Iterate through all known tags which can contain URLs. A tag either

       // contains a single attribute name or an array of attribute names.

       for (let tagName in URLElements) {

         if (tagName === childTagName) {

           if (URLElements[tagName] instanceof Array) {

             URLElements[tagName].forEach(function(attrName) {

               this._expandAttribute(ioService ,doc, child, attrName);

             }, this);

           } else {

             this._expandAttribute(ioService ,doc, child, URLElements[tagName]);

           }

         }

       }

       this._expandURLs(doc, child);

     }

   },

   /**

    * Determines the HTML that should be shared

   */

   get shareHTML() {

     let browserWin = Services.wm.getMostRecentWindow("navigator:browser");

     let tabBrowser = browserWin.getBrowser();

     let sel;

     if (browserWin && tabBrowser && tabBrowser.contentWindow &&

         (sel = tabBrowser.contentWindow.getSelection()) && sel.rangeCount) {

       let div = tabBrowser.contentWindow.document.createElement("DIV");

       for (let i = 0; i < sel.rangeCount; i++) {

         let contents = sel.getRangeAt(i).cloneContents(true);

         div.appendChild(contents);

       }

       this._expandURLs(tabBrowser.contentWindow.document, div);

       return div.outerHTML;

     }

     throw Cr.NS_ERROR_FAILURE;

   }

 };

 var component = [MetroUIUtils];

 this.NSGetFactory = XPCOMUtils.generateNSGetFactory(component);