components/download_helper.js

   1 /**
   2  * (C) Copyright 2008 Jeremy Maitin-Shepard
   3  * (C) Copyright 2011 John Foerch
   4  *
   5  * Use, modification, and distribution are subject to the terms specified in the
   6  * COPYING file.
   7 **/
   8
   9 // Register the Conkeror download_helper
  10
  11 const classID = Components.ID("{74FCB100-B972-11DC-95FF-0800200C9A66}");
  12 const classDescription = "Unknown Content Type Dialog";
  13 const contractID = "@mozilla.org/helperapplauncherdialog;1";
  14
  15 var module = {
  16
  17     /* This firstTime trick is used to delay the registration.  This
  18      * is needed to ensure it overrides the built-in component for the
  19      * same contractID (the built-in nsHelperAppDlg.js being
  20      * overridden uses this as well, and as a result we have to). */
  21
  22     /* http://dietrich.ganx4.com/blog/?p=221#comment-14 */
  23     /* https://bugzilla.mozilla.org/show_bug.cgi?id=253125 */
  24     /* https://bugzilla.mozilla.org/show_bug.cgi?id=253136 */
  25
  26     /* We can't use XPCOMUtils because that doesn't provide this delay
  27      * trick. */
  28
  29     prevTimes: 0,
  30
  31     // registerSelf: Register this component.
  32     registerSelf: function (compMgr, fileSpec, location, type) {
  33         if (this.prevTimes < 2) {
  34             this.prevTimes++;
  35             throw Components.results.NS_ERROR_FACTORY_REGISTER_AGAIN;
  36         }
  37         compMgr = compMgr.QueryInterface(Components.interfaces.nsIComponentRegistrar);
  38
  39         compMgr.registerFactoryLocation( classID,
  40                                          classDescription,
  41                                          contractID,
  42                                          fileSpec,
  43                                          location,
  44                                          type );
  45     },
  46
  47     // getClassObject: Return this component's factory object.
  48     getClassObject: function (compMgr, cid, iid) {
  49         if (!cid.equals(classID)) {
  50             throw Components.results.NS_ERROR_NO_INTERFACE;
  51         }
  52
  53         if (!iid.equals(Components.interfaces.nsIFactory)) {
  54             throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
  55         }
  56
  57         return this.factory;
  58     },
  59
  60     /* factory object */
  61     factory: {
  62         createInstance: function (outer, iid) {
  63             if (outer != null)
  64                 throw Components.results.NS_ERROR_NO_AGGREGATION;
  65
  66             /* Return an instance of the Conkeror-scope download_helper object. */
  67             var conkeror = Components.classes["@conkeror.mozdev.org/application;1"].getService().wrappedJSObject;
  68             return (new conkeror.download_helper()).QueryInterface(iid);
  69         }
  70     },
  71
  72     canUnload: function(compMgr) { return true; }
  73 };
  74
  75 function NSGetFactory (cid) { // XULRunner 2.0
  76     return module.factory;
  77 }
  78
  79 function NSGetModule(compMgr, fileSpec) {
  80     return module;
  81 }