michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: const Cc = Components.classes;
michael@0: const Ci = Components.interfaces;
michael@0: 
michael@0: Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
michael@0: 
michael@0: // -----------------------------------------------------------------------
michael@0: // Directory Provider for special browser folders and files
michael@0: // -----------------------------------------------------------------------
michael@0: 
michael@0: const NS_APP_CACHE_PARENT_DIR = "cachePDir";
michael@0: 
michael@0: function DirectoryProvider() {}
michael@0: 
michael@0: DirectoryProvider.prototype = {
michael@0:   classID: Components.ID("{ef0f7a87-c1ee-45a8-8d67-26f586e46a4b}"),
michael@0:   
michael@0:   QueryInterface: XPCOMUtils.generateQI([Ci.nsIDirectoryServiceProvider]),
michael@0: 
michael@0:   getFile: function(prop, persistent) {
michael@0:     if (prop == NS_APP_CACHE_PARENT_DIR) {
michael@0:       let dirsvc = Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties);
michael@0:       let profile = dirsvc.get("ProfD", Ci.nsIFile);
michael@0: 
michael@0:       let sysInfo = Cc["@mozilla.org/system-info;1"].getService(Ci.nsIPropertyBag2);
michael@0:       let device = sysInfo.get("device");
michael@0:       switch (device) {
michael@0:         default:
michael@0:           return profile;
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     // We are retuning null to show failure instead for throwing an error. The
michael@0:     // interface is called quite a bit and throwing an error is noisy. Returning
michael@0:     // null works with the way the interface is called [see bug 529077]
michael@0:     return null;
michael@0:   }
michael@0: };
michael@0: 
michael@0: this.NSGetFactory = XPCOMUtils.generateNSGetFactory([DirectoryProvider]);
michael@0: