components/download_helper.js

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