The Tor Browser: widget/windows/winrt/MetroUIUtils.js@ac0c01689b40 (annotated)

widget/windows/winrt/MetroUIUtils.js@ac0c01689b40 (annotated)

widget/windows/winrt/MetroUIUtils.js

Thu, 15 Jan 2015 15:59:08 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 15:59:08 +0100
branch: TOR_BUG_9701
changeset 10: ac0c01689b40
permissions: -rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* 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);