uriloader/exthandler/nsWebHandlerApp.js

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
   6  * the License. You may obtain a copy of the License at
   7  * http://www.mozilla.org/MPL/
   8  *
   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is the Mozilla browser.
  15  *
  16  * The Initial Developer of the Original Code is
  17  * Mozilla Corporation.
  18  * Portions created by the Initial Developer are Copyright (C) 2007
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   Shawn Wilsher <me@shawnwilsher.com>
  23  *   Myk Melez <myk@mozilla.org>
  24  *   Dan Mosedale <dmose@mozilla.org>
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either the GNU General Public License Version 2 or later (the "GPL"), or
  28  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
  32  * use your version of this file under the terms of the MPL, indicate your
  33  * decision by deleting the provisions above and replace them with the notice
  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
  41
  42 ////////////////////////////////////////////////////////////////////////////////
  43 //// Constants
  44
  45 const Ci = Components.interfaces;
  46 const Cr = Components.results;
  47 const Cc = Components.classes;
  48
  49 ////////////////////////////////////////////////////////////////////////////////
  50 //// nsWebHandler class
  51
  52 function nsWebHandlerApp() {}
  53
  54 nsWebHandlerApp.prototype = {
  55   //////////////////////////////////////////////////////////////////////////////
  56   //// nsWebHandler
  57
  58   classDescription: "A web handler for protocols and content",
  59   classID: Components.ID("8b1ae382-51a9-4972-b930-56977a57919d"),
  60   contractID: "@mozilla.org/uriloader/web-handler-app;1",
  61
  62   _name: null,
  63   _uriTemplate: null,
  64
  65   //////////////////////////////////////////////////////////////////////////////
  66   //// nsIHandlerApp
  67
  68   get name() {
  69     return this._name;
  70   },
  71
  72   set name(aName) {
  73     this._name = aName;
  74   },
  75
  76   equals: function(aHandlerApp) {
  77     if (!aHandlerApp)
  78       throw Cr.NS_ERROR_NULL_POINTER;
  79
  80     if (aHandlerApp instanceof Ci.nsIWebHandlerApp &&
  81         aHandlerApp.uriTemplate &&
  82         this.uriTemplate &&
  83         aHandlerApp.uriTemplate == this.uriTemplate)
  84       return true;
  85
  86     return false;
  87   },
  88
  89   launchWithURI: function nWHA__launchWithURI(aURI, aWindowContext) {
  90
  91     // XXX need to strip passwd & username from URI to handle, as per the
  92     // WhatWG HTML5 draft.  nsSimpleURL, which is what we're going to get,
  93     // can't do this directly.  Ideally, we'd fix nsStandardURL to make it
  94     // possible to turn off all of its quirks handling, and use that...
  95
  96     // encode the URI to be handled
  97     var escapedUriSpecToHandle = encodeURIComponent(aURI.spec);
  98
  99     // insert the encoded URI and create the object version
 100     var uriSpecToSend = this.uriTemplate.replace("%s", escapedUriSpecToHandle);
 101     var ioService = Cc["@mozilla.org/network/io-service;1"].
 102                     getService(Ci.nsIIOService);
 103     var uriToSend = ioService.newURI(uriSpecToSend, null, null);
 104
 105     // if we have a window context, use the URI loader to load there
 106     if (aWindowContext) {
 107
 108       // create a channel from this URI
 109       var channel = ioService.newChannelFromURI(uriToSend);
 110       channel.loadFlags = Ci.nsIChannel.LOAD_DOCUMENT_URI;
 111
 112       // load the channel
 113       var uriLoader = Cc["@mozilla.org/uriloader;1"].
 114                       getService(Ci.nsIURILoader);
 115       // XXX ideally, aIsContentPreferred (the second param) should really be
 116       // passed in from above.  Practically, true is probably a reasonable
 117       // default since browsers don't care much, and link click is likely to be
 118       // the more interesting case for non-browser apps.  See
 119       // <https://bugzilla.mozilla.org/show_bug.cgi?id=392957#c9> for details.
 120       uriLoader.openURI(channel, true, aWindowContext);
 121       return;
 122     }
 123
 124     // since we don't have a window context, hand it off to a browser
 125     var windowMediator = Cc["@mozilla.org/appshell/window-mediator;1"].
 126       getService(Ci.nsIWindowMediator);
 127
 128     // get browser dom window
 129     var browserDOMWin = windowMediator.getMostRecentWindow("navigator:browser")
 130                         .QueryInterface(Ci.nsIDOMChromeWindow)
 131                         .browserDOMWindow;
 132
 133     // if we got an exception, there are several possible reasons why:
 134     // a) this gecko embedding doesn't provide an nsIBrowserDOMWindow
 135     //    implementation (i.e. doesn't support browser-style functionality),
 136     //    so we need to kick the URL out to the OS default browser.  This is
 137     //    the subject of bug 394479.
 138     // b) this embedding does provide an nsIBrowserDOMWindow impl, but
 139     //    there doesn't happen to be a browser window open at the moment; one
 140     //    should be opened.  It's not clear whether this situation will really
 141     //    ever occur in real life.  If it does, the only API that I can find
 142     //    that seems reasonably likely to work for most embedders is the
 143     //    command line handler.
 144     // c) something else went wrong
 145     //
 146     // it's not clear how one would differentiate between the three cases
 147     // above, so for now we don't catch the exception
 148
 149     // openURI
 150     browserDOMWin.openURI(uriToSend,
 151                           null, // no window.opener
 152                           Ci.nsIBrowserDOMWindow.OPEN_DEFAULT_WINDOW,
 153                           Ci.nsIBrowserDOMWindow.OPEN_NEW);
 154
 155     return;
 156   },
 157
 158   //////////////////////////////////////////////////////////////////////////////
 159   //// nsIWebHandlerApp
 160
 161   get uriTemplate() {
 162     return this._uriTemplate;
 163   },
 164
 165   set uriTemplate(aURITemplate) {
 166     this._uriTemplate = aURITemplate;
 167   },
 168
 169   //////////////////////////////////////////////////////////////////////////////
 170   //// nsISupports
 171
 172   QueryInterface: XPCOMUtils.generateQI([Ci.nsIWebHandlerApp, Ci.nsIHandlerApp])
 173 };
 174
 175 ////////////////////////////////////////////////////////////////////////////////
 176 //// Module
 177
 178 let components = [nsWebHandlerApp];
 179
 180 function NSGetModule(compMgr, fileSpec)
 181 {
 182   return XPCOMUtils.generateModule(components);
 183 }
 184