gecko/xpfe/components/winhooks/nsUnsetDefaultMail.js

185 lines
7.4 KiB
JavaScript

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Unset Default Mail.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Bill Law <law@netscape.com>
* Sean Su <ssu@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* This file implements the nsICmdLineHandler interface. See nsICmdLineHandler.idl
* at http://lxr.mozilla.org/seamonkey/source/xpfe/appshell/public/nsICmdLineHandler.idl.
*
* This component handles the startup command line argument of the form:
* -unsetDefaultMail
* by making the current executable the "default mail client."
*
* The module is registered under the contractid
* "@mozilla.org/commandlinehandler/general-startup;1?type=unsetDefaultMail"
*
* The implementation consists of a JavaScript "class" named nsUnsetDefaultMail,
* comprised of:
* - a JS constructor function
* - a prototype providing all the interface methods and implementation stuff
*
* In addition, this file implements an nsIModule object that registers the
* nsUnsetDefaultMail component.
*/
/* ctor
*/
function nsUnsetDefaultMail() {
}
nsUnsetDefaultMail.prototype = {
// nsICmdLineHandler interface
get commandLineArgument() { throw Components.results.NS_ERROR_NOT_IMPLEMENTED; },
get prefNameForStartup() { throw Components.results.NS_ERROR_NOT_IMPLEMENTED; },
get chromeUrlForTask() {
var mapiRegistry;
try {
var mapiRegistryProgID = "@mozilla.org/mapiregistry;1"
// make sure mail is installed
if (mapiRegistryProgID in Components.classes) {
mapiRegistry = Components.classes[mapiRegistryProgID].getService(Components.interfaces.nsIMapiRegistry);
}
else {
mapiRegistry = null;
}
}
catch (ex) {
mapiRegistry = null;
}
// Restore the previous app that was the default mail handler
if(mapiRegistry)
mapiRegistry.isDefaultMailClient = false;
// Now, get the cmd line service.
var cmdLineService = Components.classes[ "@mozilla.org/app-startup/commandLineService;1" ]
.getService( Components.interfaces.nsICmdLineService );
// See if "-unsetDefaultMail" was specified. The value will be "1" if
// -unsetDefaultMail is in the service's list of cmd line arguments, and
// null otherwise. -unsetDefaultMail will only be in the service's
// arg list if the application was not already running. That's because
// if it was already running, then the service reflects the arguments
// that were specified when *that* process was started, *not* the ones
// passed via IPC from the second instance.
var option = cmdLineService.getCmdLineValue( "-unsetDefaultMail" );
if (!option) {
// Already running, so we don't have to worry about opening
// another window, etc.
throw Components.results.NS_ERROR_NOT_AVAILABLE;
}
// Return URL for dummy window that will auto-close. We do this rather
// than throw NS_ERROR_NOT_AVAILABLE, which *should* work, because it
// seems that if we don't open a window, we get a crash when trying to
// release this (or some other) JS component during XPCOM shutdown.
return "chrome://global/content/dummyWindow.xul";
},
get helpText() { throw Components.results.NS_ERROR_NOT_IMPLEMENTED; },
get handlesArgs() { return false; },
get defaultArgs() { throw Components.results.NS_ERROR_NOT_IMPLEMENTED; },
get openWindowWithArgs() { throw Components.results.NS_ERROR_NOT_IMPLEMENTED; },
// nsISupports interface
// This "class" supports nsICmdLineHandler and nsISupports.
QueryInterface: function (iid) {
if (iid.equals(Components.interfaces.nsICmdLineHandler) ||
iid.equals(Components.interfaces.nsISupports))
return this;
Components.returnCode = Components.results.NS_ERROR_NO_INTERFACE;
return null;
},
// This Component's module implementation. All the code below is used to get this
// component registered and accessible via XPCOM.
module: {
// registerSelf: Register this component.
registerSelf: function (compMgr, fileSpec, location, type) {
var compReg = compMgr.QueryInterface( Components.interfaces.nsIComponentRegistrar );
compReg.registerFactoryLocation( this.cid,
"Unset Mailnews as Default mail handler",
this.contractId,
fileSpec,
location,
type );
},
// getClassObject: Return this component's factory object.
getClassObject: function (compMgr, cid, iid) {
if (!cid.equals(this.cid))
throw Components.results.NS_ERROR_NO_INTERFACE;
if (!iid.equals(Components.interfaces.nsIFactory))
throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
return this.factory;
},
/* CID for this class */
cid: Components.ID("{ae9c026a-3bb4-485f-bab8-d7142f336ec1}"),
/* Contract ID for this class */
contractId: "@mozilla.org/commandlinehandler/general-startup;1?type=unsetDefaultMail",
/* factory object */
factory: {
// createInstance: Return a new nsUnsetDefaultMail object.
createInstance: function (outer, iid) {
if (outer != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
return (new nsUnsetDefaultMail()).QueryInterface(iid);
}
},
// canUnload: n/a (returns true)
canUnload: function(compMgr) {
return true;
}
}
}
// NSGetModule: Return the nsIModule object.
function NSGetModule(compMgr, fileSpec) {
return nsUnsetDefaultMail.prototype.module;
}