components/download_helper.js

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