(function () {

     Rakka.canAccessLocalFile = function () {
         return $.browser.mozilla;
     };

     var loadBin_mozilla = function (localFile) {
         /* localFile: nsILocalFile */

         try {
             netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
         }
         catch (e) {
             alert("Permission to read local file was denied. " +
                   "Open about:config and check that " +
                   "signed.applets.codebase_principal_support is set to true.");
         }

         var stream
             = Components.classes["@mozilla.org/network/file-input-stream;1"].createInstance(
                 Components.interfaces.nsIFileInputStream);
         stream.init(localFile, 0x01, 00004, null);

         var bstream
             = Components.classes["@mozilla.org/network/buffered-input-stream;1"].getService();
         bstream.QueryInterface(Components.interfaces.nsIBufferedInputStream);
         bstream.init(stream, 1000);
         bstream.QueryInterface(Components.interfaces.nsIInputStream);

         var binary
             = Components.classes["@mozilla.org/binaryinputstream;1"].createInstance(
                 Components.interfaces.nsIBinaryInputStream);
         binary.setInputStream(stream);

         return binary.readBytes(binary.available());
     };

     var selectFile_mozilla = function (title, mode) {
         try {
             netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
         }
         catch (e) {
             alert("Permission to select local file was denied. " +
                   "Open about:config and check that " +
                   "signed.applets.codebase_principal_support is set to true.");
         }

         var nsIFilePicker = Components.interfaces.nsIFilePicker;

         var modeID;
         if (mode == "open") {
             modeID = nsIFilePicker.modeOpen;
         }
         else if (mode == "save") {
             modeID = nsIFilePicker.modeSave;
         }
         else if (mode == "getFolder") {
             modeID = nsIFilePicker.modeGetFolder;
         }
         else if (mode == "modeOpenMultiple") {
             modeID = nsIFilePicker.modeOpenMultiple;
         }
         else {
             throw new Error("Unknown file picker mode: " + mode);
         }

         var picker = Components
                          .classes["@mozilla.org/filepicker;1"]
	                      .createInstance(nsIFilePicker);
         picker.init(window, title, modeID);
         picker.appendFilters(nsIFilePicker.filterAll);

         var ret = picker.show();
         if (ret == nsIFilePicker.returnOK || ret == nsIFilePicker.returnReplace) {
             return picker.file;
         }
         else {
             return null;
         }
     };

     Rakka.selectFile = function (title, mode) {
         if ($.browser.mozilla) {
             return selectFile_mozilla(title, mode);
         }
         else {
             throw new Error("It's not possible to select local files using JavaScript with your browser. Consider using Firefox.");
         }
     };

     Rakka.loadLocalBinaryFile = function (file) {
         if ($.browser.mozilla) {
             return loadBin_mozilla(file);
         }
         else {
             throw new Error("It's not possible to load local files using JavaScript with your browser. Consider using Firefox.");
         }
     };

})();