From d1d0564a91812e3e58569bfa0ef413d36e130d24 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 06 Jun 2012 15:24:52 -0400
Subject: [PATCH] Fix js error when dropping attachment file

---
 program/js/app.js | 1348 +++++++++++++++++++++++++++++++++++++---------------------
 1 files changed, 858 insertions(+), 490 deletions(-)

diff --git a/program/js/app.js b/program/js/app.js
index 5e51cbb..7eb8c78 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -3,9 +3,12 @@
  | Roundcube Webmail Client Script                                       |
  |                                                                       |
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2011, The Roundcube Dev Team                       |
+ | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
  | Copyright (C) 2011, Kolab Systems AG                                  |
- | Licensed under the GNU GPL                                            |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
  |                                                                       |
  +-----------------------------------------------------------------------+
  | Authors: Thomas Bruederli <roundcube@gmail.com>                       |
@@ -14,8 +17,6 @@
  +-----------------------------------------------------------------------+
  | Requires: jquery.js, common.js, list.js                               |
  +-----------------------------------------------------------------------+
-
-  $Id$
 */
 
 function rcube_webmail()
@@ -30,6 +31,7 @@
   this.command_handlers = {};
   this.onloads = [];
   this.messages = {};
+  this.group2expand = {};
 
   // create protected reference to myself
   this.ref = 'rcmail';
@@ -50,9 +52,10 @@
 
   // set jQuery ajax options
   $.ajaxSetup({
-    cache:false,
-    error:function(request, status, err){ ref.http_error(request, status, err); },
-    beforeSend:function(xmlhttp){ xmlhttp.setRequestHeader('X-Roundcube-Request', ref.env.request_token); }
+    cache: false,
+    timeout: this.env.request_timeout * 1000,
+    error: function(request, status, err){ ref.http_error(request, status, err); },
+    beforeSend: function(xmlhttp){ xmlhttp.setRequestHeader('X-Roundcube-Request', ref.env.request_token); }
   });
 
   // set environment variable(s)
@@ -132,7 +135,7 @@
     this.task = this.env.task;
 
     // check browser
-    if (!bw.dom || !bw.xmlhttp_test()) {
+    if (!bw.dom || !bw.xmlhttp_test() || (bw.mz && bw.vendver < 1.9)) {
       this.goto_url('error', '_code=0x199');
       return;
     }
@@ -171,7 +174,7 @@
     }
 
     // enable general commands
-    this.enable_command('logout', 'mail', 'addressbook', 'settings', 'save-pref', 'compose', 'undo', 'about', true);
+    this.enable_command('logout', 'mail', 'addressbook', 'settings', 'save-pref', 'compose', 'undo', 'about', 'switch-task', true);
 
     if (this.env.permaurl)
       this.enable_command('permaurl', true);
@@ -216,20 +219,18 @@
           $(this.gui_objects.qsearchbox).focusin(function() { rcmail.message_list.blur(); });
         }
 
-        if (!this.env.flag_for_deletion && this.env.trash_mailbox && this.env.mailbox != this.env.trash_mailbox)
-          this.set_alttext('delete', 'movemessagetotrash');
+        this.set_button_titles();
 
         this.env.message_commands = ['show', 'reply', 'reply-all', 'reply-list', 'forward',
           'moveto', 'copy', 'delete', 'open', 'mark', 'edit', 'viewsource', 'download',
-          'print', 'load-attachment', 'load-headers', 'forward-attachment'];
+          'print', 'load-attachment', 'show-headers', 'hide-headers', 'forward-attachment'];
 
         if (this.env.action == 'show' || this.env.action == 'preview') {
           this.enable_command(this.env.message_commands, this.env.uid);
           this.enable_command('reply-list', this.env.list_post);
 
           if (this.env.action == 'show') {
-            this.http_request('pagenav', '_uid='+this.env.uid+'&_mbox='+urlencode(this.env.mailbox)
-              + (this.env.search_request ? '&_search='+this.env.search_request : ''),
+            this.http_request('pagenav', {_uid: this.env.uid, _mbox: this.env.mailbox, _search: this.env.search_request},
               this.display_message('', 'loading'));
           }
 
@@ -246,19 +247,20 @@
           }
         }
         else if (this.env.action == 'compose') {
-          this.env.compose_commands = ['send-attachment', 'remove-attachment', 'send', 'cancel', 'toggle-editor'];
+          this.env.compose_commands = ['send-attachment', 'remove-attachment', 'send', 'cancel', 'toggle-editor', 'list-adresses'];
 
           if (this.env.drafts_mailbox)
             this.env.compose_commands.push('savedraft')
 
           this.enable_command(this.env.compose_commands, 'identities', true);
 
+          // add more commands (not enabled)
+          $.merge(this.env.compose_commands, ['add-recipient', 'firstpage', 'previouspage', 'nextpage', 'lastpage']);
+
           if (this.env.spellcheck) {
-            this.env.spellcheck.spelling_state_observer = function(s){ ref.set_spellcheck_state(s); };
+            this.env.spellcheck.spelling_state_observer = function(s) { ref.spellcheck_state(); };
             this.env.compose_commands.push('spellcheck')
-            this.set_spellcheck_state('ready');
-            if ($("input[name='_is_html']").val() == '1')
-              this.display_spellcheck_controls(false);
+            this.enable_command('spellcheck', true);
           }
 
           document.onmouseup = function(e){ return p.doc_mouse_up(e); };
@@ -269,7 +271,7 @@
         // show printing dialog
         else if (this.env.action == 'print' && this.env.uid)
           if (bw.safari)
-            window.setTimeout('window.print()', 10);
+            setTimeout('window.print()', 10);
           else
             window.print();
 
@@ -277,17 +279,37 @@
         if (this.gui_objects.mailboxlist) {
           this.env.unread_counts = {};
           this.gui_objects.folderlist = this.gui_objects.mailboxlist;
-          this.http_request('getunread', '');
+          this.http_request('getunread');
+        }
+
+        // init address book widget
+        if (this.gui_objects.contactslist) {
+          this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
+            { multiselect:true, draggable:false, keyboard:false });
+          this.contact_list.addEventListener('select', function(o){ ref.compose_recipient_select(o); });
+          this.contact_list.addEventListener('dblclick', function(o){ ref.compose_add_recipient('to'); });
+          this.contact_list.init();
+        }
+
+        if (this.gui_objects.addressbookslist) {
+          this.gui_objects.folderlist = this.gui_objects.addressbookslist;
+          this.enable_command('list-adresses', true);
         }
 
         // ask user to send MDN
         if (this.env.mdn_request && this.env.uid) {
-          var mdnurl = '_uid='+this.env.uid+'&_mbox='+urlencode(this.env.mailbox);
-          if (confirm(this.get_label('mdnrequest')))
-            this.http_post('sendmdn', mdnurl);
-          else
-            this.http_post('mark', mdnurl+'&_flag=mdnsent');
+          var postact = 'sendmdn',
+            postdata = {_uid: this.env.uid, _mbox: this.env.mailbox};
+          if (!confirm(this.get_label('mdnrequest'))) {
+            postdata._flag = 'mdnsent';
+            postact = 'mark';
+          }
+          this.http_post(postact, postdata);
         }
+
+        // detect browser capabilities
+        if (!this.is_framed())
+          this.browser_capabilities_check();
 
         break;
 
@@ -354,8 +376,11 @@
           this.enable_command('add', this.env.identities_level < 2);
         }
         else if (this.env.action == 'edit-identity' || this.env.action == 'add-identity') {
-          this.enable_command('add', this.env.identities_level < 2);
-          this.enable_command('save', 'delete', 'edit', 'toggle-editor', true);
+          this.enable_command('save', 'edit', 'toggle-editor', true);
+          this.enable_command('delete', this.env.identities_level < 2);
+
+          if (this.env.action == 'add-identity')
+            $("input[type='text']").first().select();
         }
         else if (this.env.action == 'folders') {
           this.enable_command('subscribe', 'unsubscribe', 'create-folder', 'rename-folder', true);
@@ -407,6 +432,7 @@
         // display 'loading' message on form submit, lock submit button
         $('form').submit(function () {
           $('input[type=submit]', this).prop('disabled', true);
+          rcmail.clear_messages();
           rcmail.display_message('', 'loading');
         });
 
@@ -431,6 +457,14 @@
     // map implicit containers
     if (this.gui_objects.folderlist)
       this.gui_containers.foldertray = $(this.gui_objects.folderlist);
+
+    // activate html5 file drop feature (if browser supports it and if configured)
+    if (this.gui_objects.filedrop && this.env.filedrop && ((XMLHttpRequest && XMLHttpRequest.prototype.sendAsBinary) || window.FormData)) {
+      $(document.body).bind('dragover dragleave drop', function(e){ return ref.document_drag_hover(e, e.type == 'dragover'); });
+      $(this.gui_objects.filedrop).addClass('droptarget')
+        .bind('dragover dragleave', function(e){ return ref.file_drag_hover(e, e.type == 'dragover'); })
+        .get(0).addEventListener('drop', function(e){ return ref.file_dropped(e); }, false);
+    }
 
     // trigger init event hook
     this.triggerEvent('init', { task:this.task, action:this.env.action });
@@ -547,20 +581,14 @@
         break;
 
       case 'list':
-        this.reset_qsearch();
+        if (props && props != '')
+          this.reset_qsearch();
         if (this.task == 'mail') {
           this.list_mailbox(props);
-
-          if (this.env.trash_mailbox && !this.env.flag_for_deletion)
-            this.set_alttext('delete', this.env.mailbox != this.env.trash_mailbox ? 'movemessagetotrash' : 'deletemessage');
+          this.set_button_titles();
         }
-        else if (this.task == 'addressbook') {
+        else if (this.task == 'addressbook')
           this.list_contacts(props);
-        }
-        break;
-
-      case 'load-headers':
-        this.load_headers(obj);
         break;
 
       case 'sort':
@@ -611,7 +639,7 @@
           uid = this.get_single_uid();
           if (uid && (!this.env.uid || uid != this.env.uid)) {
             if (this.env.mailbox == this.env.drafts_mailbox)
-              this.goto_url('compose', '_draft_uid='+uid+'&_mbox='+urlencode(this.env.mailbox), true);
+              this.goto_url('compose', { _draft_uid: uid, _mbox: this.env.mailbox }, true);
             else
               this.show_message(uid);
           }
@@ -633,13 +661,14 @@
         break;
 
       case 'edit':
-        if (this.task=='addressbook' && (cid = this.get_single_cid()))
+        if (this.task == 'addressbook' && (cid = this.get_single_cid()))
           this.load_contact(cid, 'edit');
-        else if (this.task=='settings' && props)
+        else if (this.task == 'settings' && props)
           this.load_identity(props, 'edit-identity');
-        else if (this.task=='mail' && (cid = this.get_single_uid())) {
-          url = (this.env.mailbox == this.env.drafts_mailbox) ? '_draft_uid=' : '_uid=';
-          this.goto_url('compose', url+cid+'&_mbox='+urlencode(this.env.mailbox), true);
+        else if (this.task == 'mail' && (cid = this.get_single_uid())) {
+          url = { _mbox: this.env.mailbox };
+          url[this.env.mailbox == this.env.drafts_mailbox ? '_draft_uid' : '_uid'] = cid;
+          this.goto_url('compose', url, true);
         }
         break;
 
@@ -749,8 +778,8 @@
 
       case 'always-load':
         if (this.env.uid && this.env.sender) {
-          this.add_contact(urlencode(this.env.sender));
-          window.setTimeout(function(){ ref.command('load-images'); }, 300);
+          this.add_contact(this.env.sender);
+          setTimeout(function(){ ref.command('load-images'); }, 300);
           break;
         }
 
@@ -768,7 +797,7 @@
             qstring += '&_safe=1';
           this.attachment_win = window.open(this.env.comm_path+'&_action=get&'+qstring+'&_frame=1', 'rcubemailattachment');
           if (this.attachment_win) {
-            window.setTimeout(function(){ ref.attachment_win.focus(); }, 10);
+            setTimeout(function(){ ref.attachment_win.focus(); }, 10);
             break;
           }
         }
@@ -838,6 +867,9 @@
           url += '&_mbox='+urlencode(this.env.mailbox);
           if (props)
              url += '&_to='+urlencode(props);
+          // also send search request so we can go back to search result after message is sent
+          if (this.env.search_request)
+            url += '&_search='+this.env.search_request;
         }
         // modify url if we're in addressbook
         else if (this.task == 'addressbook') {
@@ -873,29 +905,40 @@
         break;
 
       case 'spellcheck':
-        if (window.tinyMCE && tinyMCE.get(this.env.composebody)) {
-          tinyMCE.execCommand('mceSpellCheck', true);
+        if (this.spellcheck_state()) {
+          this.stop_spellchecking();
         }
-        else if (this.env.spellcheck && this.env.spellcheck.spellCheck && this.spellcheck_ready) {
-          this.env.spellcheck.spellCheck();
-          this.set_spellcheck_state('checking');
+        else {
+          if (window.tinyMCE && tinyMCE.get(this.env.composebody)) {
+            tinyMCE.execCommand('mceSpellCheck', true);
+          }
+          else if (this.env.spellcheck && this.env.spellcheck.spellCheck) {
+            this.env.spellcheck.spellCheck();
+          }
         }
+        this.spellcheck_state();
         break;
 
       case 'savedraft':
+        var form = this.gui_objects.messageform, msgid;
+
         // Reset the auto-save timer
-        self.clearTimeout(this.save_timer);
+        clearTimeout(this.save_timer);
 
-        if (!this.gui_objects.messageform)
+        // saving Drafts is disabled
+        if (!form)
           break;
 
-        // if saving Drafts is disabled in main.inc.php
-        // or if compose form did not change
-        if (!this.env.drafts_mailbox || this.cmp_hash == this.compose_field_hash())
+        // compose form did not change
+        if (this.cmp_hash == this.compose_field_hash()) {
+          this.auto_save_start();
           break;
+        }
 
-        var form = this.gui_objects.messageform,
-          msgid = this.set_busy(true, 'savingmessage');
+        // re-set keep-alive timeout
+        this.start_keepalive();
+
+        msgid = this.set_busy(true, 'savingmessage');
 
         form.target = "savetarget";
         form._draft.value = '1';
@@ -911,7 +954,7 @@
           break;
 
         // Reset the auto-save timer
-        self.clearTimeout(this.save_timer);
+        clearTimeout(this.save_timer);
 
         // all checks passed, send message
         var lang = this.spellcheck_lang(),
@@ -924,14 +967,12 @@
         form.action = this.add_url(form.action, '_lang', lang);
         form.submit();
 
-        // clear timeout (sending could take longer)
-        clearTimeout(this.request_timer);
         break;
 
       case 'send-attachment':
         // Reset the auto-save timer
-        self.clearTimeout(this.save_timer);
-        
+        clearTimeout(this.save_timer);
+
         this.upload_file(props || this.gui_objects.uploadform);
         break;
 
@@ -939,16 +980,25 @@
         this.change_identity($("[name='_from']")[0], true);
         break;
 
+      case 'list-adresses':
+        this.list_contacts(props);
+        this.enable_command('add-recipient', false);
+        break;
+
+      case 'add-recipient':
+        this.compose_add_recipient(props);
+        break;
+
       case 'reply-all':
       case 'reply-list':
       case 'reply':
         if (uid = this.get_single_uid()) {
-          url = '_reply_uid='+uid+'&_mbox='+urlencode(this.env.mailbox);
+          url = {_reply_uid: uid, _mbox: this.env.mailbox};
           if (command == 'reply-all')
             // do reply-list, when list is detected and popup menu wasn't used 
-            url += '&_all=' + (!props && this.commands['reply-list'] ? 'list' : 'all');
+            url._all = (!props && this.commands['reply-list'] ? 'list' : 'all');
           else if (command == 'reply-list')
-            url += '&_all=list';
+            url._all = list;
 
           this.goto_url('compose', url, true);
         }
@@ -957,9 +1007,9 @@
       case 'forward-attachment':
       case 'forward':
         if (uid = this.get_single_uid()) {
-          url = '_forward_uid='+uid+'&_mbox='+urlencode(this.env.mailbox);
+          url = { _forward_uid: uid, _mbox: this.env.mailbox };
           if (command == 'forward-attachment' || (!props && this.env.forward_attachment))
-            url += '&_attachment=1';
+            url._attachment = 1;
           this.goto_url('compose', url, true);
         }
         break;
@@ -968,7 +1018,7 @@
         if (uid = this.get_single_uid()) {
           ref.printwin = window.open(this.env.comm_path+'&_action=print&_uid='+uid+'&_mbox='+urlencode(this.env.mailbox)+(this.env.safemode ? '&_safe=1' : ''));
           if (this.printwin) {
-            window.setTimeout(function(){ ref.printwin.focus(); }, 20);
+            setTimeout(function(){ ref.printwin.focus(); }, 20);
             if (this.env.action != 'show')
               this.mark_message('read', uid);
           }
@@ -979,13 +1029,13 @@
         if (uid = this.get_single_uid()) {
           ref.sourcewin = window.open(this.env.comm_path+'&_action=viewsource&_uid='+uid+'&_mbox='+urlencode(this.env.mailbox));
           if (this.sourcewin)
-            window.setTimeout(function(){ ref.sourcewin.focus(); }, 20);
+            setTimeout(function(){ ref.sourcewin.focus(); }, 20);
           }
         break;
 
       case 'download':
         if (uid = this.get_single_uid())
-          this.goto_url('viewsource', '&_uid='+uid+'&_mbox='+urlencode(this.env.mailbox)+'&_save=1');
+          this.goto_url('viewsource', { _uid: uid, _mbox: this.env.mailbox, _save: 1 });
         break;
 
       // quicksearch
@@ -1038,7 +1088,7 @@
 
       case 'export':
         if (this.contact_list.rowcount > 0) {
-          this.goto_url('export', { _source:this.env.source, _gid:this.env.group, _search:this.env.search_request });
+          this.goto_url('export', { _source: this.env.source, _gid: this.env.group, _search: this.env.search_request });
         }
         break;
 
@@ -1065,7 +1115,7 @@
       default:
         var func = command.replace(/-/g, '_');
         if (this[func] && typeof this[func] === 'function') {
-          ret = this[func](props);
+          ret = this[func](props, obj);
         }
         break;
     }
@@ -1118,14 +1168,6 @@
     if (this.gui_objects.editform)
       this.lock_form(this.gui_objects.editform, a);
 
-    // clear pending timer
-    if (this.request_timer)
-      clearTimeout(this.request_timer);
-
-    // set timer for requests
-    if (a && this.env.request_timeout)
-      this.request_timer = window.setTimeout(function(){ ref.request_timed_out(); }, this.env.request_timeout * 1000);
-
     return id;
   };
 
@@ -1164,19 +1206,12 @@
     return url.replace(/_task=[a-z]+/, '_task='+task);
   };
 
-  // called when a request timed out
-  this.request_timed_out = function()
-  {
-    this.set_busy(false);
-    this.display_message('Request timed out!', 'error');
-  };
-
   this.reload = function(delay)
   {
     if (this.is_framed())
       parent.rcmail.reload(delay);
     else if (delay)
-      window.setTimeout(function(){ rcmail.reload(); }, delay);
+      setTimeout(function(){ rcmail.reload(); }, delay);
     else if (window.location)
       location.href = this.env.comm_path + (this.env.action ? '&_action='+this.env.action : '');
   };
@@ -1198,8 +1233,8 @@
 
       return url.replace(/(\?.*)$/, urldata);
     }
-    else
-      return url + '?' + name + '=' + value;
+
+    return url + '?' + name + '=' + value;
   };
 
   this.is_framed = function()
@@ -1309,7 +1344,7 @@
     this.env.last_folder_target = null;
 
     if (this.folder_auto_timer) {
-      window.clearTimeout(this.folder_auto_timer);
+      clearTimeout(this.folder_auto_timer);
       this.folder_auto_timer = null;
       this.folder_auto_expand = null;
     }
@@ -1362,15 +1397,15 @@
             // if the folder is collapsed, expand it after 1sec and restart the drag & drop process.
             if (div.hasClass('collapsed')) {
               if (this.folder_auto_timer)
-                window.clearTimeout(this.folder_auto_timer);
+                clearTimeout(this.folder_auto_timer);
 
               this.folder_auto_expand = this.env.mailboxes[k].id;
-              this.folder_auto_timer = window.setTimeout(function() {
+              this.folder_auto_timer = setTimeout(function() {
                 rcmail.command('collapse-folder', rcmail.folder_auto_expand);
                 rcmail.drag_start(null);
               }, 1000);
             } else if (this.folder_auto_timer) {
-              window.clearTimeout(this.folder_auto_timer);
+              clearTimeout(this.folder_auto_timer);
               this.folder_auto_timer = null;
               this.folder_auto_expand = null;
             }
@@ -1411,8 +1446,9 @@
       div.removeClass('expanded').addClass('collapsed');
       this.env.collapsed_folders = this.env.collapsed_folders+'&'+urlencode(name)+'&';
 
-      // select parent folder if one of its childs is currently selected
-      if (this.env.mailbox.indexOf(name + this.env.delimiter) == 0)
+      // select the folder if one of its childs is currently selected
+      // don't select if it's virtual (#1488346)
+      if (this.env.mailbox.indexOf(name + this.env.delimiter) == 0 && !$(li).hasClass('virtual'))
         this.command('list', name);
     }
     else
@@ -1521,7 +1557,7 @@
 
     // start timer for message preview (wait for double click)
     if (selected && this.env.contentframe && !list.multi_selecting && !this.dummy_select)
-      this.preview_timer = window.setTimeout(function(){ ref.msglist_get_preview(); }, 200);
+      this.preview_timer = setTimeout(function(){ ref.msglist_get_preview(); }, 200);
     else if (this.env.contentframe)
       this.show_contentframe(false);
   };
@@ -1538,7 +1574,7 @@
           clearTimeout(this.preview_timer);
         if (this.preview_read_timer)
           clearTimeout(this.preview_read_timer);
-        this.preview_timer = window.setTimeout(function(){ ref.msglist_get_preview(); }, 200);
+        this.preview_timer = setTimeout(function(){ ref.msglist_get_preview(); }, 200);
       }
     }
   };
@@ -1553,7 +1589,7 @@
 
     var uid = list.get_single_selection();
     if (uid && this.env.mailbox == this.env.drafts_mailbox)
-      this.goto_url('compose', '_draft_uid='+uid+'&_mbox='+urlencode(this.env.mailbox), true);
+      this.goto_url('compose', { _draft_uid: uid, _mbox: this.env.mailbox }, true);
     else if (uid)
       this.show_message(uid, false, false);
   };
@@ -1586,6 +1622,7 @@
   {
     if (this.env.messages[row.uid])
       this.env.messages[row.uid].expanded = row.expanded;
+    $(row.obj)[row.expanded?'addClass':'removeClass']('expanded');
   };
 
   this.msglist_set_coltypes = function(list)
@@ -1704,11 +1741,12 @@
       flags: flags.extra_flags
     });
 
-    var c, n, col, html, tree = '', expando = '',
+    var c, n, col, html, css_class,
+      tree = '', expando = '',
       list = this.message_list,
       rows = list.rows,
       message = this.env.messages[uid],
-      css_class = 'message'
+      row_class = 'message'
         + (!flags.seen ? ' unread' : '')
         + (flags.deleted ? ' deleted' : '')
         + (flags.flagged ? ' flagged' : '')
@@ -1718,7 +1756,6 @@
       row = document.createElement('tr');
 
     row.id = 'rcmrow'+uid;
-    row.className = css_class;
 
     // message status icons
     css_class = 'msgicon';
@@ -1755,6 +1792,8 @@
         }
         else
           message.expanded = true;
+
+        row_class += ' thread expanded';
       }
       else if (message.has_children) {
         if (message.expanded === undefined && (this.env.autoexpand_threads == 1 || (this.env.autoexpand_threads == 2 && message.unread_children))) {
@@ -1762,10 +1801,12 @@
         }
 
         expando = '<div id="rcmexpando' + uid + '" class="' + (message.expanded ? 'expanded' : 'collapsed') + '">&nbsp;&nbsp;</div>';
+        row_class += ' thread' + (message.expanded? ' expanded' : '');
       }
     }
 
     tree += '<span id="msgicn'+uid+'" class="'+css_class+'">&nbsp;</span>';
+    row.className = row_class;
 
     // build subject link 
     if (!bw.ie && cols.subject) {
@@ -1807,8 +1848,11 @@
       else if (c == 'threads')
         html = expando;
       else if (c == 'subject') {
-        if (bw.ie)
+        if (bw.ie) {
           col.onmouseover = function() { rcube_webmail.long_subject_title_ie(this, message.depth+1); };
+          if (bw.ie8)
+            tree = '<span></span>' + tree; // #1487821
+        }
         html = tree + cols[c];
       }
       else if (c == 'priority') {
@@ -1848,7 +1892,7 @@
 
   this.set_list_options = function(cols, sort_col, sort_order, threads)
   {
-    var update, add_url = '';
+    var update, post_data = {};
 
     if (sort_col === undefined)
       sort_col = this.env.sort_col;
@@ -1862,7 +1906,7 @@
 
     if (this.env.threading != threads) {
       update = 1;
-      add_url += '&_threads=' + threads;
+      post_data._threads = threads;
     }
 
     if (cols && cols.length) {
@@ -1882,12 +1926,12 @@
 
       if (newcols.join() != oldcols.join()) {
         update = 1;
-        add_url += '&_cols=' + newcols.join(',');
+        post_data._cols = newcols.join(',');
       }
     }
 
     if (update)
-      this.list_mailbox('', '', sort_col+'_'+sort_order, add_url);
+      this.list_mailbox('', '', sort_col+'_'+sort_order, post_data);
   };
 
   // when user doble-clicks on a row
@@ -1912,14 +1956,17 @@
     if (this.env.search_request)
       url += '&_search='+this.env.search_request;
 
-    if (action == 'preview' && String(target.location.href).indexOf(url) >= 0)
+    // add browser capabilities, so we can properly handle attachments
+    url += '&_caps='+urlencode(this.browser_capabilities());
+
+    if (preview && String(target.location.href).indexOf(url) >= 0)
       this.show_contentframe(true);
     else {
       this.location_href(this.env.comm_path+url, target, true);
 
       // mark as read and change mbox unread counter
-      if (action == 'preview' && this.message_list && this.message_list.rows[id] && this.message_list.rows[id].unread && this.env.preview_pane_mark_read >= 0) {
-        this.preview_read_timer = window.setTimeout(function() {
+      if (preview && this.message_list && this.message_list.rows[id] && this.message_list.rows[id].unread && this.env.preview_pane_mark_read >= 0) {
+        this.preview_read_timer = setTimeout(function() {
           ref.set_message(id, 'unread', false);
           ref.update_thread_root(id, 'read');
           if (ref.env.unread_counts[ref.env.mailbox]) {
@@ -1927,7 +1974,7 @@
             ref.set_unread_count(ref.env.mailbox, ref.env.unread_counts[ref.env.mailbox], ref.env.mailbox == 'INBOX');
           }
           if (ref.env.preview_pane_mark_read > 0)
-            ref.http_post('mark', '_uid='+id+'&_flag=read&_quiet=1');
+            ref.http_post('mark', {_uid: id, _flag: 'read', _quiet: 1});
         }, this.env.preview_pane_mark_read * 1000);
       }
     }
@@ -1970,10 +2017,10 @@
     if (page > 0 && page <= this.env.pagecount) {
       this.env.current_page = page;
 
-      if (this.task == 'mail')
-        this.list_mailbox(this.env.mailbox, page);
-      else if (this.task == 'addressbook')
+      if (this.task == 'addressbook' || this.contact_list)
         this.list_contacts(this.env.source, this.env.group, page);
+      else if (this.task == 'mail')
+        this.list_mailbox(this.env.mailbox, page);
     }
   };
 
@@ -1990,23 +2037,23 @@
   };
 
   // list messages of a specific mailbox
-  this.list_mailbox = function(mbox, page, sort, add_url)
+  this.list_mailbox = function(mbox, page, sort, url)
   {
-    var url = '', target = window;
+    var target = window;
+
+    if (typeof url != 'object')
+      url = {};
 
     if (!mbox)
       mbox = this.env.mailbox ? this.env.mailbox : 'INBOX';
 
-    if (add_url)
-      url += add_url;
-
     // add sort to url if set
     if (sort)
-      url += '&_sort=' + sort;
+      url._sort = sort;
 
     // also send search request to get the right messages
     if (this.env.search_request)
-      url += '&_search='+this.env.search_request;
+      url._search = this.env.search_request;
 
     // set page=1 if changeing to another mailbox
     if (this.env.mailbox != mbox) {
@@ -2019,7 +2066,7 @@
     this.clear_message_list();
 
     if (mbox != this.env.mailbox || (mbox == this.env.mailbox && !page && !sort))
-      url += '&_refresh=1';
+      url._refresh = 1;
 
     this.select_folder(mbox, '', true);
     this.unmark_folder(mbox, 'recent', '', true);
@@ -2033,13 +2080,16 @@
 
     if (this.env.contentframe && window.frames && window.frames[this.env.contentframe]) {
       target = window.frames[this.env.contentframe];
-      url += '&_framed=1';
+      url._framed = 1;
     }
 
     // load message list to target frame/window
     if (mbox) {
       this.set_busy(true, 'loading');
-      this.location_href(this.env.comm_path+'&_mbox='+urlencode(mbox)+(page ? '&_page='+page : '')+url, target);
+      url._mbox = mbox;
+      if (page)
+        url._page = page;
+      this.location_href(url, target);
     }
   };
 
@@ -2054,15 +2104,20 @@
   };
 
   // send remote request to load message list
-  this.list_mailbox_remote = function(mbox, page, add_url)
+  this.list_mailbox_remote = function(mbox, page, post_data)
   {
     // clear message list first
     this.message_list.clear();
 
-    // send request to server
-    var url = '_mbox='+urlencode(mbox)+(page ? '&_page='+page : ''),
-      lock = this.set_busy(true, 'loading');
-    this.http_request('list', url+add_url, lock);
+    var lock = this.set_busy(true, 'loading');
+
+    if (typeof post_data != 'object')
+      post_data = {};
+    post_data._mbox = mbox;
+    if (page)
+      post_data._page = page;
+
+    this.http_request('list', post_data, lock);
   };
 
   // removes messages that doesn't exists from list selection array
@@ -2087,8 +2142,8 @@
 
     while (new_row) {
       if (new_row.nodeType == 1 && (r = this.message_list.rows[new_row.uid]) && r.unread_children) {
-	    this.message_list.expand_all(r);
-	    this.set_unread_children(r.uid);
+        this.message_list.expand_all(r);
+        this.set_unread_children(r.uid);
       }
       new_row = new_row.nextSibling;
     }
@@ -2273,38 +2328,38 @@
     row = row.obj.nextSibling;
     while (row) {
       if (row.nodeType == 1 && (r = rows[row.uid])) {
-	    if (!r.depth || r.depth <= depth)
-	      break;
+        if (!r.depth || r.depth <= depth)
+          break;
 
-	    r.depth--; // move left
+        r.depth--; // move left
         // reset width and clear the content of a tab, icons will be added later
-	    $('#rcmtab'+r.uid).width(r.depth * 15).html('');
+        $('#rcmtab'+r.uid).width(r.depth * 15).html('');
         if (!r.depth) { // a new root
-	      count++; // increase roots count
-	      r.parent_uid = 0;
-	      if (r.has_children) {
-	        // replace 'leaf' with 'collapsed'
-	        $('#rcmrow'+r.uid+' '+'.leaf:first')
+          count++; // increase roots count
+          r.parent_uid = 0;
+          if (r.has_children) {
+            // replace 'leaf' with 'collapsed'
+            $('#rcmrow'+r.uid+' '+'.leaf:first')
               .attr('id', 'rcmexpando' + r.uid)
-	          .attr('class', (r.obj.style.display != 'none' ? 'expanded' : 'collapsed'))
-    	      .bind('mousedown', {uid:r.uid, p:this},
-	            function(e) { return e.data.p.expand_message_row(e, e.data.uid); });
+              .attr('class', (r.obj.style.display != 'none' ? 'expanded' : 'collapsed'))
+              .bind('mousedown', {uid:r.uid, p:this},
+                function(e) { return e.data.p.expand_message_row(e, e.data.uid); });
 
-	        r.unread_children = 0;
-	        roots.push(r);
-	      }
-	      // show if it was hidden
-	      if (r.obj.style.display == 'none')
-	        $(r.obj).show();
-	    }
-	    else {
-	      if (r.depth == depth)
-	        r.parent_uid = parent;
-	      if (r.unread && roots.length)
-	        roots[roots.length-1].unread_children++;
-	    }
-	  }
-	  row = row.nextSibling;
+            r.unread_children = 0;
+            roots.push(r);
+          }
+          // show if it was hidden
+          if (r.obj.style.display == 'none')
+            $(r.obj).show();
+        }
+        else {
+          if (r.depth == depth)
+            r.parent_uid = parent;
+          if (r.unread && roots.length)
+            roots[roots.length-1].unread_children++;
+        }
+      }
+      row = row.nextSibling;
     }
 
     // update unread_children for roots
@@ -2323,13 +2378,13 @@
 
     while (row) {
       if (row.nodeType == 1 && (r = rows[row.uid])) {
-	    if (!r.depth && cnt)
-	      cnt--;
+        if (!r.depth && cnt)
+          cnt--;
 
         if (!cnt)
-	      this.message_list.remove_row(row.uid);
-	  }
-	  row = row.nextSibling;
+          this.message_list.remove_row(row.uid);
+      }
+      row = row.nextSibling;
     }
   };
 
@@ -2455,23 +2510,23 @@
     if (!mbox || mbox == this.env.mailbox || (!this.env.uid && (!this.message_list || !this.message_list.get_selection().length)))
       return;
 
-    var a_uids = [],
+    var a_uids = [], n, selection,
       lock = this.display_message(this.get_label('copyingmessage'), 'loading'),
-      add_url = '&_target_mbox='+urlencode(mbox)+'&_from='+(this.env.action ? this.env.action : '');
+      post_data = {_mbox: this.env.mailbox, _target_mbox: mbox, _from: (this.env.action ? this.env.action : '')};
 
     if (this.env.uid)
       a_uids[0] = this.env.uid;
     else {
-      var selection = this.message_list.get_selection();
-      for (var n in selection) {
+      selection = this.message_list.get_selection();
+      for (n in selection) {
         a_uids.push(selection[n]);
       }
     }
 
-    add_url += '&_uid='+this.uids_to_list(a_uids);
+    post_data._uid = this.uids_to_list(a_uids);
 
     // send request to server
-    this.http_post('copy', '_mbox='+urlencode(this.env.mailbox)+add_url, lock);
+    this.http_post('copy', post_data, lock);
   };
 
   // move selected messages to the specified mailbox
@@ -2485,19 +2540,18 @@
       return;
 
     var lock = false,
-      add_url = '&_target_mbox='+urlencode(mbox)+'&_from='+(this.env.action ? this.env.action : '');
+      add_post = {_target_mbox: mbox, _from: (this.env.action ? this.env.action : '')};
 
     // show wait message
-    if (this.env.action == 'show') {
+    if (this.env.action == 'show')
       lock = this.set_busy(true, 'movingmessage');
-    }
     else
       this.show_contentframe(false);
 
     // Hide message command buttons until a message is selected
     this.enable_command(this.env.message_commands, false);
 
-    this._with_selected_messages('moveto', lock, add_url);
+    this._with_selected_messages('moveto', lock, add_post);
   };
 
   // delete selected messages from the current mailbox
@@ -2527,6 +2581,9 @@
     // @TODO: we should check if defined trash mailbox exists
     else if (!trash || this.env.mailbox == trash)
       this.permanently_remove_messages();
+    // we're in Junk folder and delete_junk is enabled
+    else if (this.env.delete_junk && this.env.junk_mailbox && this.env.mailbox == this.env.junk_mailbox)
+      this.permanently_remove_messages();
     // if there is a trash mailbox defined and we're not currently in it
     else {
       // if shift was pressed delete it immediately
@@ -2549,14 +2606,17 @@
       return;
 
     this.show_contentframe(false);
-    this._with_selected_messages('delete', false, '&_from='+(this.env.action ? this.env.action : ''));
+    this._with_selected_messages('delete', false, {_from: this.env.action ? this.env.action : ''});
   };
 
   // Send a specifc moveto/delete request with UIDs of all selected messages
   // @private
-  this._with_selected_messages = function(action, lock, add_url)
+  this._with_selected_messages = function(action, lock, post_data)
   {
-    var a_uids = [], count = 0, msg;
+    var a_uids = [], count = 0, msg, lock;
+
+    if (typeof(post_data) != 'object')
+      post_data = {};
 
     if (this.env.uid)
       a_uids[0] = this.env.uid;
@@ -2588,18 +2648,19 @@
 
     // also send search request to get the right messages
     if (this.env.search_request)
-      add_url += '&_search='+this.env.search_request;
+      post_data._search = this.env.search_request;
 
     if (this.env.display_next && this.env.next_uid)
-      add_url += '&_next_uid='+this.env.next_uid;
+      post_data._next_uid = this.env.next_uid;
 
     if (count < 0)
-      add_url += '&_count='+(count*-1);
-    else if (count > 0) 
-      // remove threads from the end of the list
+      post_data._count = (count*-1);
+    // remove threads from the end of the list
+    else if (count > 0)
       this.delete_excessive_thread_rows();
 
-    add_url += '&_uid='+this.uids_to_list(a_uids);
+    post_data._uid = this.uids_to_list(a_uids);
+    post_data._mbox = this.env.mailbox;
 
     if (!lock) {
       msg = action == 'moveto' ? 'movingmessage' : 'deletingmessage';
@@ -2607,7 +2668,7 @@
     }
 
     // send request to server
-    this.http_post(action, '_mbox='+urlencode(this.env.mailbox)+add_url, lock);
+    this.http_post(action, post_data, lock);
   };
 
   // set a specific flag to one or more messages
@@ -2666,7 +2727,7 @@
   this.toggle_read_status = function(flag, a_uids)
   {
     var i, len = a_uids.length,
-      url = '_uid='+this.uids_to_list(a_uids)+'&_flag='+flag,
+      post_data = {_uid: this.uids_to_list(a_uids), _flag: flag},
       lock = this.display_message(this.get_label('markingmessage'), 'loading');
 
     // mark all message rows as read/unread
@@ -2675,9 +2736,9 @@
 
     // also send search request to get the right messages
     if (this.env.search_request)
-      url += '&_search='+this.env.search_request;
+      post_data._search = this.env.search_request;
 
-    this.http_post('mark', url, lock);
+    this.http_post('mark', post_data, lock);
 
     for (i=0; i<len; i++)
       this.update_thread_root(a_uids[i], flag);
@@ -2687,7 +2748,7 @@
   this.toggle_flagged_status = function(flag, a_uids)
   {
     var i, len = a_uids.length,
-      url = '_uid='+this.uids_to_list(a_uids)+'&_flag='+flag,
+      post_data = {_uid: this.uids_to_list(a_uids), _flag: flag},
       lock = this.display_message(this.get_label('markingmessage'), 'loading');
 
     // mark all message rows as flagged/unflagged
@@ -2696,9 +2757,9 @@
 
     // also send search request to get the right messages
     if (this.env.search_request)
-      url += '&_search='+this.env.search_request;
+      post_data._search = this.env.search_request;
 
-    this.http_post('mark', url, lock);
+    this.http_post('mark', post_data, lock);
   };
 
   // mark all message rows as deleted/undeleted
@@ -2736,7 +2797,7 @@
   this.flag_as_undeleted = function(a_uids)
   {
     var i, len=a_uids.length,
-      url = '_uid='+this.uids_to_list(a_uids)+'&_flag=undelete',
+      post_data = {_uid: this.uids_to_list(a_uids), _flag: 'undelete'},
       lock = this.display_message(this.get_label('markingmessage'), 'loading');
 
     for (i=0; i<len; i++)
@@ -2744,16 +2805,17 @@
 
     // also send search request to get the right messages
     if (this.env.search_request)
-      url += '&_search='+this.env.search_request;
+      post_data._search = this.env.search_request;
 
-    this.http_post('mark', url, lock);
+    this.http_post('mark', post_data, lock);
     return true;
   };
 
   this.flag_as_deleted = function(a_uids)
   {
-    var add_url = '',
-      r_uids = [],
+    var r_uids = [],
+      post_data = {_uid: this.uids_to_list(a_uids), _flag: 'delete'},
+      lock = this.display_message(this.get_label('markingmessage'), 'loading'),
       rows = this.message_list ? this.message_list.rows : [],
       count = 0;
 
@@ -2763,12 +2825,12 @@
         if (rows[uid].unread)
           r_uids[r_uids.length] = uid;
 
-	    if (this.env.skip_deleted) {
-	      count += this.update_thread(uid);
+        if (this.env.skip_deleted) {
+          count += this.update_thread(uid);
           this.message_list.remove_row(uid, (this.env.display_next && i == this.message_list.selection.length-1));
-	    }
-	    else
-	      this.set_message(uid, 'deleted', true);
+        }
+        else
+          this.set_message(uid, 'deleted', true);
       }
     }
 
@@ -2777,29 +2839,27 @@
       if(!this.env.display_next)
         this.message_list.clear_selection();
       if (count < 0)
-        add_url += '&_count='+(count*-1);
+        post_data._count = (count*-1);
       else if (count > 0) 
         // remove threads from the end of the list
         this.delete_excessive_thread_rows();
     }
 
-    add_url = '&_from='+(this.env.action ? this.env.action : ''),
-      lock = this.display_message(this.get_label('markingmessage'), 'loading');
+    if (this.env.action)
+      post_data._from = this.env.action;
 
     // ??
     if (r_uids.length)
-      add_url += '&_ruid='+this.uids_to_list(r_uids);
+      post_data._ruid = this.uids_to_list(r_uids);
 
-    if (this.env.skip_deleted) {
-      if (this.env.display_next && this.env.next_uid)
-        add_url += '&_next_uid='+this.env.next_uid;
-    }
+    if (this.env.skip_deleted && this.env.display_next && this.env.next_uid)
+      post_data._next_uid = this.env.next_uid;
 
     // also send search request to get the right messages
     if (this.env.search_request)
-      add_url += '&_search='+this.env.search_request;
+      post_data._search = this.env.search_request;
 
-    this.http_post('mark', '_uid='+this.uids_to_list(a_uids)+'&_flag=delete'+add_url, lock);
+    this.http_post('mark', post_data, lock);
     return true;
   };
 
@@ -2826,6 +2886,19 @@
     return this.select_all_mode ? '*' : uids.join(',');
   };
 
+  // Sets title of the delete button
+  this.set_button_titles = function()
+  {
+    var label = 'deletemessage';
+
+    if (!this.env.flag_for_deletion
+      && this.env.trash_mailbox && this.env.mailbox != this.env.trash_mailbox
+      && (!this.env.delete_junk || !this.env.junk_mailbox || this.env.mailbox != this.env.junk_mailbox)
+    )
+      label = 'movemessagetotrash';
+
+    this.set_alttext('delete', label);
+  };
 
   /*********************************************************/
   /*********       mailbox folders methods         *********/
@@ -2833,24 +2906,23 @@
 
   this.expunge_mailbox = function(mbox)
   {
-    var lock, url = '_mbox='+urlencode(mbox);
+    var lock, post_data = {_mbox: mbox};
 
     // lock interface if it's the active mailbox
     if (mbox == this.env.mailbox) {
       lock = this.set_busy(true, 'loading');
-      url += '&_reload=1';
+      post_data._reload = 1;
       if (this.env.search_request)
-        url += '&_search='+this.env.search_request;
+        post_data._search = this.env.search_request;
     }
 
     // send request to server
-    this.http_post('expunge', url, lock);
+    this.http_post('expunge', post_data, lock);
   };
 
   this.purge_mailbox = function(mbox)
   {
-    var lock = false,
-      url = '_mbox='+urlencode(mbox);
+    var lock, post_data = {_mbox: mbox};
 
     if (!confirm(this.get_label('purgefolderconfirm')))
       return false;
@@ -2858,11 +2930,11 @@
     // lock interface if it's the active mailbox
     if (mbox == this.env.mailbox) {
        lock = this.set_busy(true, 'loading');
-       url += '&_reload=1';
+       post_data._reload = 1;
      }
 
     // send request to server
-    this.http_post('purge', url, lock);
+    this.http_post('purge', post_data, lock);
   };
 
   // test if purge command is allowed
@@ -2930,7 +3002,7 @@
       this.set_caret_pos(input_message, this.env.top_posting ? 0 : $(input_message).val().length);
       // add signature according to selected identity
       // if we have HTML editor, signature is added in callback
-      if (input_from.prop('type') == 'select-one' && $("input[name='_draft_saveid']").val() == '') {
+      if (input_from.prop('type') == 'select-one') {
         this.change_identity(input_from[0]);
       }
     }
@@ -2957,6 +3029,38 @@
 
     obj[bw.ie || bw.safari || bw.chrome ? 'keydown' : 'keypress'](function(e) { return ref.ksearch_keydown(e, this, props); })
       .attr('autocomplete', 'off');
+  };
+
+  this.compose_recipient_select = function(list)
+  {
+    this.enable_command('add-recipient', list.selection.length > 0);
+  };
+
+  this.compose_add_recipient = function(field)
+  {
+    var recipients = [], input = $('#_'+field);
+
+    if (this.contact_list && this.contact_list.selection.length) {
+      for (var id, n=0; n < this.contact_list.selection.length; n++) {
+        id = this.contact_list.selection[n];
+        if (id && this.env.contactdata[id]) {
+          recipients.push(this.env.contactdata[id]);
+
+          // group is added, expand it
+          if (id.charAt(0) == 'E' && this.env.contactdata[id].indexOf('@') < 0 && input.length) {
+            var gid = id.substr(1);
+            this.group2expand[gid] = { name:this.env.contactdata[id], input:input.get(0) };
+            this.http_request('group-expand', {_source: this.env.source, _gid: gid}, false);
+          }
+        }
+      }
+    }
+
+    if (recipients.length && input.length) {
+      var oldval = input.val();
+      input.val((oldval ? oldval + this.env.recipients_delimiter : '') + recipients.join(this.env.recipients_delimiter));
+      this.triggerEvent('add-recipient', { field:field, recipients:recipients });
+    }
   };
 
   // checks the input fields before sending a message
@@ -3044,20 +3148,19 @@
 
   this.toggle_editor = function(props)
   {
+    this.stop_spellchecking();
+
     if (props.mode == 'html') {
-      this.display_spellcheck_controls(false);
       this.plain2html($('#'+props.id).val(), props.id);
       tinyMCE.execCommand('mceAddControl', false, props.id);
 
       if (this.env.default_font)
-        window.setTimeout(function() {
+        setTimeout(function() {
           $(tinyMCE.get(props.id).getBody()).css('font-family', rcmail.env.default_font);
         }, 500);
     }
     else {
       var thisMCE = tinyMCE.get(props.id), existingHtml;
-      if (thisMCE.plugins.spellchecker && thisMCE.plugins.spellchecker.active)
-        thisMCE.execCommand('mceSpellCheck', false);
 
       if (existingHtml = thisMCE.getContent()) {
         if (!confirm(this.get_label('editorwarning'))) {
@@ -3066,7 +3169,6 @@
         this.html2plain(existingHtml, props.id);
       }
       tinyMCE.execCommand('mceRemoveControl', false, props.id);
-      this.display_spellcheck_controls(true);
     }
 
     return true;
@@ -3075,43 +3177,53 @@
   this.stop_spellchecking = function()
   {
     var ed;
+
     if (window.tinyMCE && (ed = tinyMCE.get(this.env.composebody))) {
-      if (ed.plugins.spellchecker && ed.plugins.spellchecker.active)
+      if (ed.plugins && ed.plugins.spellchecker && ed.plugins.spellchecker.active)
         ed.execCommand('mceSpellCheck');
     }
-    else if ((ed = this.env.spellcheck) && !this.spellcheck_ready) {
-      $(ed.spell_span).trigger('click');
-      this.set_spellcheck_state('ready');
+    else if (ed = this.env.spellcheck) {
+      if (ed.state && ed.state != 'ready' && ed.state != 'no_error_found')
+        $(ed.spell_span).trigger('click');
     }
+
+    this.spellcheck_state();
   };
 
-  this.display_spellcheck_controls = function(vis)
+  this.spellcheck_state = function()
   {
-    if (this.env.spellcheck) {
-      // stop spellchecking process
-      if (!vis)
-        this.stop_spellchecking();
+    var ed, active;
 
-      $(this.env.spellcheck.spell_container)[vis ? 'show' : 'hide']();
-    }
-  };
+    if (window.tinyMCE && (ed = tinyMCE.get(this.env.composebody)) && ed.plugins && ed.plugins.spellchecker)
+      active = ed.plugins.spellchecker.active;
+    else if ((ed = this.env.spellcheck) && ed.state)
+      active = ed.state != 'ready' && ed.state != 'no_error_found';
 
-  this.set_spellcheck_state = function(s)
-  {
-    this.spellcheck_ready = (s == 'ready' || s == 'no_error_found');
-    this.enable_command('spellcheck', this.spellcheck_ready);
+    if (rcmail.buttons.spellcheck)
+      $('#'+rcmail.buttons.spellcheck[0].id)[active ? 'addClass' : 'removeClass']('selected');
+
+    return active;
   };
 
   // get selected language
   this.spellcheck_lang = function()
   {
     var ed;
-    if (window.tinyMCE && (ed = tinyMCE.get(this.env.composebody)) && ed.plugins.spellchecker) {
+
+    if (window.tinyMCE && (ed = tinyMCE.get(this.env.composebody)) && ed.plugins && ed.plugins.spellchecker)
       return ed.plugins.spellchecker.selectedLang;
-    }
-    else if (this.env.spellcheck) {
+    else if (this.env.spellcheck)
       return GOOGIE_CUR_LANG;
-    }
+  };
+
+  this.spellcheck_lang_set = function(lang)
+  {
+    var ed;
+
+    if (window.tinyMCE && (ed = tinyMCE.get(this.env.composebody)) && ed.plugins)
+      ed.plugins.spellchecker.selectedLang = lang;
+    else if (this.env.spellcheck)
+      this.env.spellcheck.setCurrentLanguage(lang);
   };
 
   // resume spellchecking, highlight provided mispellings without new ajax request
@@ -3130,6 +3242,8 @@
       sp.prepare(false, true);
       sp.processData(data);
     }
+
+    this.spellcheck_state();
   }
 
   this.set_draft_id = function(id)
@@ -3140,7 +3254,7 @@
   this.auto_save_start = function()
   {
     if (this.env.draft_autosave)
-      this.save_timer = self.setTimeout(function(){ ref.command("savedraft"); }, this.env.draft_autosave * 1000);
+      this.save_timer = setTimeout(function(){ ref.command("savedraft"); }, this.env.draft_autosave * 1000);
 
     // Unlock interface now that saving is complete
     this.busy = false;
@@ -3149,20 +3263,11 @@
   this.compose_field_hash = function(save)
   {
     // check input fields
-    var ed, str = '',
-      value_to = $("[name='_to']").val(),
-      value_cc = $("[name='_cc']").val(),
-      value_bcc = $("[name='_bcc']").val(),
-      value_subject = $("[name='_subject']").val();
+    var ed, i, val, str = '', hash_fields = ['to', 'cc', 'bcc', 'subject'];
 
-    if (value_to)
-      str += value_to+':';
-    if (value_cc)
-      str += value_cc+':';
-    if (value_bcc)
-      str += value_bcc+':';
-    if (value_subject)
-      str += value_subject+':';
+    for (i=0; i<hash_fields.length; i++)
+      if (val = $('[name="_' + hash_fields[i] + '"]').val())
+        str += val + ':';
 
     if (window.tinyMCE && (ed = tinyMCE.get(this.env.composebody)))
       str += ed.getContent();
@@ -3356,11 +3461,7 @@
       var content = '<span>' + this.get_label('uploading' + (files > 1 ? 'many' : '')) + '</span>',
         ts = frame_name.replace(/^rcmupload/, '');
 
-      if (this.env.loadingicon)
-        content = '<img src="'+this.env.loadingicon+'" alt="" class="uploading" />'+content;
-      if (this.env.cancelicon)
-        content = '<a title="'+this.get_label('cancel')+'" onclick="return rcmail.cancel_attachment_upload(\''+ts+'\', \''+frame_name+'\');" href="#cancelupload" class="cancelupload"><img src="'+this.env.cancelicon+'" alt="" /></a>'+content;
-      this.add2attachment_list(ts, { name:'', html:content, classname:'uploading', complete:false });
+      this.add2attachment_list(ts, { name:'', html:content, classname:'uploading', frame:frame_name, complete:false });
 
       // upload progress support
       if (this.env.upload_progress_time) {
@@ -3379,6 +3480,13 @@
   {
     if (!this.gui_objects.attachmentlist)
       return false;
+
+    if (!att.complete && ref.env.loadingicon)
+      att.html = '<img src="'+ref.env.loadingicon+'" alt="" class="uploading" />' + att.html;
+
+    if (!att.complete && att.frame)
+      att.html = '<a title="'+this.get_label('cancel')+'" onclick="return rcmail.cancel_attachment_upload(\''+name+'\', \''+att.frame+'\');" href="#cancelupload" class="cancelupload">'
+        + (this.env.cancelicon ? '<img src="'+this.env.cancelicon+'" alt="" />' : this.get_label('cancel')) + '</a>' + att.html;
 
     var indicator, li = $('<li>').attr('id', name).addClass(att.classname).html(att.html);
 
@@ -3424,7 +3532,7 @@
 
   this.upload_progress_start = function(action, name)
   {
-    window.setTimeout(function() { rcmail.http_request(action, {_progress: name}); },
+    setTimeout(function() { rcmail.http_request(action, {_progress: name}); },
       this.env.upload_progress_time * 1000);
   };
 
@@ -3445,7 +3553,7 @@
   this.add_contact = function(value)
   {
     if (value)
-      this.http_post('addcontact', '_address='+value);
+      this.http_post('addcontact', {_address: value});
 
     return true;
   };
@@ -3454,18 +3562,23 @@
   this.qsearch = function(value)
   {
     if (value != '') {
-      var n, lock = this.set_busy(true, 'searching');
+      var r, lock = this.set_busy(true, 'searching'),
+        url = this.search_params(value);
 
       if (this.message_list)
         this.clear_message_list();
       else if (this.contact_list)
         this.list_contacts_clear();
 
+      if (this.env.source)
+        url._source = this.env.source;
+      if (this.env.group)
+        url._gid = this.env.group;
+
       // reset vars
       this.env.current_page = 1;
-      r = this.http_request('search', this.search_params(value)
-        + (this.env.source ? '&_source='+urlencode(this.env.source) : '')
-        + (this.env.group ? '&_gid='+urlencode(this.env.group) : ''), lock);
+
+      r = this.http_request('search', url, lock);
 
       this.env.qsearch = {lock: lock, request: r};
     }
@@ -3474,7 +3587,7 @@
   // build URL params for search
   this.search_params = function(search, filter)
   {
-    var n, url = [], mods_arr = [],
+    var n, url = {}, mods_arr = [],
       mods = this.env.search_mods,
       mbox = this.env.mailbox;
 
@@ -3485,10 +3598,10 @@
       search = this.gui_objects.qsearchbox.value;
 
     if (filter)
-      url.push('_filter=' + urlencode(filter));
+      url._filter = filter;
 
     if (search) {
-      url.push('_q='+urlencode(search));
+      url._q = search;
 
       if (mods && this.message_list)
         mods = mods[mbox] ? mods[mbox] : mods['*'];
@@ -3496,14 +3609,14 @@
       if (mods) {
         for (n in mods)
           mods_arr.push(n);
-        url.push('_headers='+mods_arr.join(','));
+        url._headers = mods_arr.join(',');
       }
     }
 
     if (mbox)
-      url.push('_mbox='+urlencode(mbox));
+      url._mbox = mbox;
 
-    return url.join('&');
+    return url;
   };
 
   // reset quick-search form
@@ -3524,7 +3637,7 @@
   {
     this.display_message(msg, type);
     // before redirect we need to wait some time for Chrome (#1486177)
-    window.setTimeout(function(){ ref.list_mailbox(); }, 500);
+    setTimeout(function(){ ref.list_mailbox(); }, 500);
   };
 
 
@@ -3543,9 +3656,9 @@
       mod = rcube_event.get_modifier(e);
 
     switch (key) {
-      case 38:  // key up
-      case 40:  // key down
-        if (!this.ksearch_pane)
+      case 38:  // arrow up
+      case 40:  // arrow down
+        if (!this.ksearch_visible())
           break;
 
         var dir = key==38 ? 1 : 0;
@@ -3582,11 +3695,11 @@
       case 37:  // left
       case 39:  // right
         if (mod != SHIFT_KEY)
-	      return;
+          return;
     }
 
     // start timer
-    this.ksearch_timer = window.setTimeout(function(){ ref.ksearch_get_results(props); }, 200);
+    this.ksearch_timer = setTimeout(function(){ ref.ksearch_get_results(props); }, 200);
     this.ksearch_input = obj;
 
     return true;
@@ -3630,9 +3743,8 @@
     // insert all members of a group
     if (typeof this.env.contacts[id] === 'object' && this.env.contacts[id].id) {
       insert += this.env.contacts[id].name + this.env.recipients_delimiter;
-      this.group2expand = $.extend({}, this.env.contacts[id]);
-      this.group2expand.input = this.ksearch_input;
-      this.http_request('mail/group-expand', '_source='+urlencode(this.env.contacts[id].source)+'&_gid='+urlencode(this.env.contacts[id].id), false);
+      this.group2expand[this.env.contacts[id].id] = $.extend({ input: this.ksearch_input }, this.env.contacts[id]);
+      this.http_request('mail/group-expand', {_source: this.env.contacts[id].source, _gid: this.env.contacts[id].id}, false);
     }
     else if (typeof this.env.contacts[id] === 'string') {
       insert = this.env.contacts[id] + this.env.recipients_delimiter;
@@ -3652,10 +3764,10 @@
 
   this.replace_group_recipients = function(id, recipients)
   {
-    if (this.group2expand && this.group2expand.id == id) {
-      this.group2expand.input.value = this.group2expand.input.value.replace(this.group2expand.name, recipients);
-      this.triggerEvent('autocomplete_insert', { field:this.group2expand.input, insert:recipients });
-      this.group2expand = null;
+    if (this.group2expand[id]) {
+      this.group2expand[id].input.value = this.group2expand[id].input.value.replace(this.group2expand[id].name, recipients);
+      this.triggerEvent('autocomplete_insert', { field:this.group2expand[id].input, insert:recipients });
+      this.group2expand[id] = null;
     }
   };
 
@@ -3702,10 +3814,11 @@
       return;
 
     // ...new search value contains old one and previous search was not finished or its result was empty
-    if (old_value && old_value.length && q.indexOf(old_value) == 0 && (!ac || !ac.num) && this.env.contacts && !this.env.contacts.length)
+    if (old_value && old_value.length && q.indexOf(old_value) == 0 && (!ac || ac.num <= 0) && this.env.contacts && !this.env.contacts.length)
       return;
 
     var i, lock, source, xhr, reqid = new Date().getTime(),
+      post_data = {_search: q, _id: reqid},
       threads = props && props.threads ? props.threads : 1,
       sources = props && props.sources ? props.sources : [],
       action = props && props.action ? props.action : 'mail/autocomplete';
@@ -3715,12 +3828,12 @@
 
     for (i=0; i<threads; i++) {
       source = this.ksearch_data.sources.shift();
-      if (threads > 1 && source === null)
+      if (threads > 1 && source === undefined)
         break;
 
+      post_data._source = source ? source : '';
       lock = this.display_message(this.get_label('searching'), 'loading');
-      xhr = this.http_post(action, '_search='+urlencode(q)+'&_id='+reqid
-        + (source ? '&_source='+urlencode(source) : ''), lock);
+      xhr = this.http_post(action, post_data, lock);
 
       this.ksearch_data.locks.push(lock);
       this.ksearch_data.requests.push(xhr);
@@ -3798,11 +3911,11 @@
     if (data.id == reqid) {
       data.num--;
       if (maxlen > 0 && data.sources.length) {
-        var lock, xhr, source = data.sources.shift();
+        var lock, xhr, source = data.sources.shift(), post_data;
         if (source) {
+          post_data = {_search: value, _id: reqid, _source: source};
           lock = this.display_message(this.get_label('searching'), 'loading');
-          xhr = this.http_post(data.action, '_search='+urlencode(value)+'&_id='+reqid
-            +'&_source='+urlencode(source), lock);
+          xhr = this.http_post(data.action, post_data, lock);
 
           this.ksearch_data.locks.push(lock);
           this.ksearch_data.requests.push(xhr);
@@ -3894,7 +4007,7 @@
       source = this.env.source ? this.env.address_sources[this.env.source] : null;
 
     if (id = list.get_single_selection())
-      this.preview_timer = window.setTimeout(function(){ ref.load_contact(id, 'show'); }, 200);
+      this.preview_timer = setTimeout(function(){ ref.load_contact(id, 'show'); }, 200);
     else if (this.env.contentframe)
       this.show_contentframe(false);
 
@@ -3915,6 +4028,10 @@
       }
     }
 
+    // if a group is currently selected, and there is at least one contact selected
+    // thend we can enable the group-remove-selected command
+    this.enable_command('group-remove-selected', typeof this.env.group != 'undefined' && list.selection.length > 0);
+
     this.enable_command('compose', this.env.group || list.selection.length > 0);
     this.enable_command('edit', id && writable);
     this.enable_command('delete', list.selection.length && writable);
@@ -3924,7 +4041,7 @@
 
   this.list_contacts = function(src, group, page)
   {
-    var folder, add_url = '',
+    var folder, url = {},
       target = window;
 
     if (!src)
@@ -3958,20 +4075,22 @@
 
     if (this.env.contentframe && window.frames && window.frames[this.env.contentframe]) {
       target = window.frames[this.env.contentframe];
-      add_url = '&_framed=1';
+      url._framed = 1;
     }
 
     if (group)
-      add_url += '&_gid='+group;
+      url._gid = group;
     if (page)
-      add_url += '&_page='+page;
+      url._page = page;
+    if (src)
+      url._source = src;
 
     // also send search request to get the correct listing
     if (this.env.search_request)
-      add_url += '&_search='+this.env.search_request;
+      url._search = this.env.search_request;
 
     this.set_busy(true, 'loading');
-    this.location_href(this.env.comm_path + (src ? '&_source='+urlencode(src) : '') + add_url, target);
+    this.location_href(url, target);
   };
 
   // send remote request to load contacts list
@@ -3981,20 +4100,23 @@
     this.list_contacts_clear();
 
     // send request to server
-    var url = (src ? '_source='+urlencode(src) : '') + (page ? (src?'&':'') + '_page='+page : ''),
-      lock = this.set_busy(true, 'loading');
+    var url = {}, lock = this.set_busy(true, 'loading');
+
+    if (src)
+      url._source = src;
+    if (page)
+      url._page = page;
+    if (group)
+      url._gid = group;
 
     this.env.source = src;
     this.env.group = group;
 
-    if (group)
-      url += '&_gid='+group;
-
     // also send search request to get the right messages
     if (this.env.search_request)
-      url += '&_search='+this.env.search_request;
+      url._search = this.env.search_request;
 
-    this.http_request('list', url, lock);
+    this.http_request(this.env.task == 'mail' ? 'list-contacts' : 'list', url, lock);
   };
 
   this.list_contacts_clear = function()
@@ -4008,10 +4130,10 @@
   // load contact record
   this.load_contact = function(cid, action, framed)
   {
-    var add_url = '', target = window;
+    var url = {}, target = window;
 
     if (this.env.contentframe && window.frames && window.frames[this.env.contentframe]) {
-      add_url = '&_framed=1';
+      url._framed = 1;
       target = window.frames[this.env.contentframe];
       this.show_contentframe(true);
 
@@ -4027,12 +4149,15 @@
 
     if (action && (cid || action=='add') && !this.drag_active) {
       if (this.env.group)
-        add_url += '&_gid='+urlencode(this.env.group);
+        url._gid = this.env.group;
 
-      this.location_href(this.env.comm_path+'&_action='+action
-        +'&_source='+urlencode(this.env.source)
-        +'&_cid='+urlencode(cid) + add_url, target, true);
+      url._action = action;
+      url._source = this.env.source;
+      url._cid = cid;
+
+      this.location_href(url, target, true);
     }
+
     return true;
   };
 
@@ -4040,11 +4165,11 @@
   this.group_member_change = function(what, cid, source, gid)
   {
     what = what == 'add' ? 'add' : 'del';
-    var lock = this.display_message(this.get_label(what == 'add' ? 'addingmember' : 'removingmember'), 'loading');
+    var label = this.get_label(what == 'add' ? 'addingmember' : 'removingmember'),
+      lock = this.display_message(label, 'loading'),
+      post_data = {_cid: cid, _source: source, _gid: gid};
 
-    this.http_post('group-'+what+'members', '_cid='+urlencode(cid)
-      + '&_source='+urlencode(source)
-      + '&_gid='+urlencode(gid), lock);
+    this.http_post('group-'+what+'members', post_data, lock);
   };
 
   // copy a contact to the specified target (group or directory)
@@ -4056,19 +4181,18 @@
     if (to.type == 'group' && to.source == this.env.source)
       this.group_member_change('add', cid, to.source, to.id);
     else if (to.type == 'group' && !this.env.address_sources[to.source].readonly) {
-      var lock = this.display_message(this.get_label('copyingcontact'), 'loading');
-      this.http_post('copy', '_cid='+urlencode(cid)
-        + '&_source='+urlencode(this.env.source)
-        + '&_to='+urlencode(to.source)
-        + '&_togid='+urlencode(to.id)
-        + (this.env.group ? '&_gid='+urlencode(this.env.group) : ''), lock);
+      var lock = this.display_message(this.get_label('copyingcontact'), 'loading'),
+        post_data = {_cid: cid, _source: this.env.source, _to: to.source, _togid: to.id,
+          _gid: (this.env.group ? this.env.group : '')};
+
+      this.http_post('copy', post_data, lock);
     }
     else if (to.id != this.env.source && cid && this.env.address_sources[to.id] && !this.env.address_sources[to.id].readonly) {
-      var lock = this.display_message(this.get_label('copyingcontact'), 'loading');
-      this.http_post('copy', '_cid='+urlencode(cid)
-        + '&_source='+urlencode(this.env.source)
-        + '&_to='+urlencode(to.id)
-        + (this.env.group ? '&_gid='+urlencode(this.env.group) : ''), lock);
+      var lock = this.display_message(this.get_label('copyingcontact'), 'loading'),
+        post_data = {_cid: cid, _source: this.env.source, _to: to.id,
+          _gid: (this.env.group ? this.env.group : '')};
+
+      this.http_post('copy', post_data, lock);
     }
   };
 
@@ -4081,7 +4205,9 @@
     if (!(selection.length || this.env.cid) || (!undelete && !confirm(this.get_label('deletecontactconfirm'))))
       return;
 
-    var id, n, a_cids = [], qs = '';
+    var id, n, a_cids = [],
+      post_data = {_source: this.env.source, _from: (this.env.action ? this.env.action : '')},
+      lock = this.display_message(this.get_label('contactdeleting'), 'loading');
 
     if (this.env.cid)
       a_cids.push(this.env.cid);
@@ -4097,18 +4223,17 @@
         this.show_contentframe(false);
     }
 
+    post_data._cid = a_cids.join(',');
+
     if (this.env.group)
-      qs += '&_gid='+urlencode(this.env.group);
+      post_data._gid = this.env.group;
 
     // also send search request to get the right records from the next page
     if (this.env.search_request)
-      qs += '&_search='+this.env.search_request;
+      post_data._search = this.env.search_request;
 
     // send request to server
-    this.http_post('delete', '_cid='+urlencode(a_cids.join(','))
-      +'&_source='+urlencode(this.env.source)
-      +'&_from='+(this.env.action ? this.env.action : '')+qs,
-      this.display_message(this.get_label('contactdeleting'), 'loading'));
+    this.http_post('delete', post_data, lock)
 
     return true;
   };
@@ -4145,7 +4270,7 @@
   };
 
   // add row to contacts list
-  this.add_contact_row = function(cid, cols, select)
+  this.add_contact_row = function(cid, cols, classes)
   {
     if (!this.gui_objects.contactslist)
       return false;
@@ -4154,7 +4279,7 @@
       row = document.createElement('tr');
 
     row.id = 'rcmrow'+this.html_identifier(cid);
-    row.className = 'contact';
+    row.className = 'contact ' + (classes || '');
 
     if (list.in_selection(cid))
       row.className += ' selected';
@@ -4200,7 +4325,6 @@
         yearRange: '-100:+10',
         showOtherMonths: true,
         selectOtherMonths: true,
-        monthNamesShort: this.env.month_names,
         onSelect: function(dateText) { $(this).focus().val(dateText) }
       });
       $('input.datepicker').datepicker();
@@ -4238,7 +4362,7 @@
   {
     if (this.env.group && confirm(this.get_label('deletegroupconfirm'))) {
       var lock = this.set_busy(true, 'groupdeleting');
-      this.http_post('group-delete', '_source='+urlencode(this.env.source)+'&_gid='+urlencode(this.env.group), lock);
+      this.http_post('group-delete', {_source: this.env.source, _gid: this.env.group}, lock);
     }
   };
 
@@ -4275,6 +4399,25 @@
     this.name_input.select().focus();
   };
 
+  //remove selected contacts from current active group
+  this.group_remove_selected = function()
+  {
+    ref.http_post('group-delmembers', {_cid: this.contact_list.selection,
+      _source: this.env.source, _gid: this.env.group});
+  };
+
+  //callback after deleting contact(s) from current group
+  this.remove_group_contacts = function(props)
+  {
+    if('undefined' != typeof this.env.group && (this.env.group === props.gid)){
+      var n, selection = this.contact_list.get_selection();
+      for (n=0; n<selection.length; n++) {
+        id = selection[n];
+        this.contact_list.remove_row(id, (n == selection.length-1));
+      }
+    }
+  }
+
   // handler for keyboard events on the input field
   this.add_input_keydown = function(e)
   {
@@ -4289,11 +4432,11 @@
         var lock = this.set_busy(true, 'loading');
 
         if (itype == 'contactsearch')
-          this.http_post('search-create', '_search='+urlencode(this.env.search_request)+'&_name='+urlencode(newname), lock);
+          this.http_post('search-create', {_search: this.env.search_request, _name: newname}, lock);
         else if (this.env.group_renaming)
-          this.http_post('group-rename', '_source='+urlencode(this.env.source)+'&_gid='+urlencode(this.env.group)+'&_name='+urlencode(newname), lock);
+          this.http_post('group-rename', {_source: this.env.source, _gid: this.env.group, _name: newname}, lock);
         else
-          this.http_post('group-create', '_source='+urlencode(this.env.source)+'&_name='+urlencode(newname), lock);
+          this.http_post('group-create', {_source: this.env.source, _name: newname}, lock);
       }
       return false;
     }
@@ -4419,12 +4562,13 @@
 
   this.init_edit_field = function(col, elem)
   {
+    var label = this.env.coltypes[col].label;
+
     if (!elem)
       elem = $('.ff_' + col);
 
-    elem.focus(function(){ ref.focus_textfield(this); })
-      .blur(function(){ ref.blur_textfield(this); })
-      .each(function(){ this._placeholder = this.title = (ref.env.coltypes[col].label || ''); ref.blur_textfield(this); });
+    if (label)
+      elem.placeholder(label);
   };
 
   this.insert_edit_field = function(col, section, menu)
@@ -4439,8 +4583,15 @@
       var lastelem = $('.ff_'+col),
         appendcontainer = $('#contactsection'+section+' .contactcontroller'+col);
 
-      if (!appendcontainer.length)
-        appendcontainer = $('<fieldset>').addClass('contactfieldgroup contactcontroller'+col).insertAfter($('#contactsection'+section+' .contactfieldgroup').last());
+      if (!appendcontainer.length) {
+        var sect = $('#contactsection'+section),
+          lastgroup = $('.contactfieldgroup', sect).last();
+        appendcontainer = $('<fieldset>').addClass('contactfieldgroup contactcontroller'+col);
+        if (lastgroup.length)
+          appendcontainer.insertAfter(lastgroup);
+        else
+          sect.prepend(appendcontainer);
+      }
 
       if (appendcontainer.length && appendcontainer.get(0).nodeName == 'FIELDSET') {
         var input, colprop = this.env.coltypes[col],
@@ -4464,6 +4615,14 @@
 
           if (colprop.type == 'date' && $.datepicker)
             input.datepicker();
+        }
+        else if (colprop.type == 'textarea') {
+          input = $('<textarea>')
+            .addClass('ff_'+col)
+            .attr({ name: '_'+col+name_suffix, cols:colprop.size, rows:colprop.rows })
+            .appendTo(cell);
+
+          this.init_edit_field(col, input);
         }
         else if (colprop.type == 'composite') {
           var childcol, cp, first, templ, cols = [], suffices = [];
@@ -4583,7 +4742,7 @@
   {
     var n, buttons = this.buttons['upload-photo'];
     for (n=0; buttons && n < buttons.length; n++)
-      $('#'+buttons[n].id).html(this.get_label(id == '-del-' ? 'addphoto' : 'replacephoto'));
+      $('a#'+buttons[n].id).html(this.get_label(id == '-del-' ? 'addphoto' : 'replacephoto'));
 
     $('#ff_photo').val(id);
     this.enable_command('upload-photo', this.env.coltypes.photo ? true : false);
@@ -4593,15 +4752,15 @@
   // load advanced search page
   this.advanced_search = function()
   {
-    var add_url = '&_form=1', target = window;
+    var url = {_form: 1, _action: 'search'}, target = window;
 
     if (this.env.contentframe && window.frames && window.frames[this.env.contentframe]) {
-      add_url += '&_framed=1';
+      url._framed = 1;
       target = window.frames[this.env.contentframe];
       this.contact_list.clear_selection();
     }
 
-    this.location_href(this.env.comm_path+'&_action=search'+add_url, target, true);
+    this.location_href(url, target, true);
 
     return true;
   };
@@ -4674,7 +4833,7 @@
   {
     if (this.env.search_request) {
       var lock = this.set_busy(true, 'savedsearchdeleting');
-      this.http_post('search-delete', '_sid='+urlencode(this.env.search_id), lock);
+      this.http_post('search-delete', {_sid: this.env.search_id}, lock);
     }
   };
 
@@ -4708,7 +4867,7 @@
 
     // reset vars
     this.env.current_page = 1;
-    this.http_request('search', '_sid='+urlencode(id), lock);
+    this.http_request('search', {_sid: id}, lock);
   };
 
 
@@ -4719,14 +4878,15 @@
   // preferences section select and load options frame
   this.section_select = function(list)
   {
-    var id = list.get_single_selection(), add_url = '', target = window;
+    var id = list.get_single_selection(), target = window,
+      url = {_action: 'edit-prefs', _section: id};
 
     if (id) {
       if (this.env.contentframe && window.frames && window.frames[this.env.contentframe]) {
-        add_url = '&_framed=1';
+        url._framed = 1;
         target = window.frames[this.env.contentframe];
       }
-      this.location_href(this.env.comm_path+'&_action=edit-prefs&_section='+id+add_url, target, true);
+      this.location_href(url, target, true);
     }
 
     return true;
@@ -4735,27 +4895,30 @@
   this.identity_select = function(list)
   {
     var id;
-    if (id = list.get_single_selection())
+    if (id = list.get_single_selection()) {
+      this.enable_command('delete', list.rowcount > 1 && this.env.identities_level < 2);
       this.load_identity(id, 'edit-identity');
+    }
   };
 
   // load identity record
   this.load_identity = function(id, action)
   {
-    if (action=='edit-identity' && (!id || id==this.env.iid))
+    if (action == 'edit-identity' && (!id || id == this.env.iid))
       return false;
 
-    var add_url = '', target = window;
+    var target = window,
+      url = {_action: action, _iid: id};
 
     if (this.env.contentframe && window.frames && window.frames[this.env.contentframe]) {
-      add_url = '&_framed=1';
+      url._framed = 1;
       target = window.frames[this.env.contentframe];
       document.getElementById(this.env.contentframe).style.visibility = 'inherit';
     }
 
-    if (action && (id || action=='add-identity')) {
+    if (action && (id || action == 'add-identity')) {
       this.set_busy(true);
-      this.location_href(this.env.comm_path+'&_action='+action+'&_iid='+id+add_url, target);
+      this.location_href(url, target);
     }
 
     return true;
@@ -4763,7 +4926,7 @@
 
   this.delete_identity = function(id)
   {
-    // exit if no mailbox specified or if selection is empty
+    // exit if no identity is specified or if selection is empty
     var selection = this.identity_list.get_selection();
     if (!(selection.length || this.env.iid))
       return;
@@ -4771,10 +4934,27 @@
     if (!id)
       id = this.env.iid ? this.env.iid : selection[0];
 
-    // append token to request
-    this.goto_url('delete-identity', '_iid='+id+'&_token='+this.env.request_token, true);
+    // submit request with appended token
+    if (confirm(this.get_label('deleteidentityconfirm')))
+      this.goto_url('delete-identity', { _iid: id, _token: this.env.request_token }, true);
 
     return true;
+  };
+
+  this.update_identity_row = function(id, name, add)
+  {
+    var row, col, list = this.identity_list,
+      rid = this.html_identifier(id);
+
+    if (list.rows[rid] && (row = list.rows[rid].obj)) {
+      $(row.cells[0]).html(name);
+    }
+    else if (add) {
+      row = $('<tr>').attr('id', 'rcmrow'+rid).get(0);
+      col = $('<td>').addClass('mail').html(name).appendTo(row);
+      list.insert_row(row);
+      list.select(rid);
+    }
   };
 
 
@@ -4863,7 +5043,7 @@
         newname = this.env.dstfolder === '' ? basename : this.env.dstfolder+this.env.delimiter+basename;
 
       if (newname != this.env.mailbox) {
-        this.http_post('rename-folder', '_folder_oldname='+urlencode(this.env.mailbox)+'&_folder_newname='+urlencode(newname), this.set_busy(true, 'foldermoving'));
+        this.http_post('rename-folder', {_folder_oldname: this.env.mailbox, _folder_newname: newname}, this.set_busy(true, 'foldermoving'));
         this.subscription_list.draglayer.hide();
       }
     }
@@ -4885,7 +5065,7 @@
 
     if (folder && confirm(this.get_label('deletefolderconfirm'))) {
       var lock = this.set_busy(true, 'folderdeleting');
-      this.http_post('delete-folder', '_mbox='+urlencode(folder), lock);
+      this.http_post('delete-folder', {_mbox: folder}, lock);
     }
   };
 
@@ -4895,7 +5075,7 @@
     if (!this.gui_objects.subscriptionlist)
       return false;
 
-    var row, n, i, tmp, folders, rowid, list = [], slist = [],
+    var row, n, i, tmp, tmp_name, folders, rowid, list = [], slist = [],
       tbody = this.gui_objects.subscriptionlist.tBodies[0],
       refrow = $('tr', tbody).get(1),
       id = 'rcmrow'+((new Date).getTime());
@@ -4931,8 +5111,12 @@
     for (n in folders) {
       // protected folder
       if (folders[n][2]) {
+        tmp_name = folders[n][0] + this.env.delimiter;
+        // prefix namespace cannot have subfolders (#1488349)
+        if (tmp_name == this.env.prefix_ns)
+          continue;
         slist.push(folders[n][0]);
-        tmp = folders[n][0]+this.env.delimiter;
+        tmp = tmp_name;
       }
       // protected folder's child
       else if (tmp && folders[n][0].indexOf(tmp) == 0)
@@ -5079,7 +5263,7 @@
   {
     if (folder) {
       var lock = this.display_message(this.get_label('foldersubscribing'), 'loading');
-      this.http_post('subscribe', '_mbox='+urlencode(folder), lock);
+      this.http_post('subscribe', {_mbox: folder}, lock);
     }
   };
 
@@ -5087,7 +5271,7 @@
   {
     if (folder) {
       var lock = this.display_message(this.get_label('folderunsubscribing'), 'loading');
-      this.http_post('unsubscribe', '_mbox='+urlencode(folder), lock);
+      this.http_post('unsubscribe', {_mbox: folder}, lock);
     }
   };
 
@@ -5116,12 +5300,10 @@
       url += '&_framed=1';
     }
 
-    if (String(target.location.href).indexOf(url) >= 0 && !force) {
+    if (String(target.location.href).indexOf(url) >= 0 && !force)
       this.show_contentframe(true);
-    }
-    else {
+    else
       this.location_href(this.env.comm_path+url, target, true);
-    }
   };
 
   // disables subscription checkbox (for protected folder)
@@ -5135,7 +5317,7 @@
   this.folder_size = function(folder)
   {
     var lock = this.set_busy(true, 'loading');
-    this.http_post('folder-size', '_mbox='+urlencode(folder), lock);
+    this.http_post('folder-size', {_mbox: folder}, lock);
   };
 
   this.folder_size_update = function(size)
@@ -5210,7 +5392,7 @@
       obj = document.getElementById(button.id);
 
       // get default/passive setting of the button
-      if (obj && button.type=='image' && !button.status) {
+      if (obj && button.type == 'image' && !button.status) {
         button.pas = obj._original_src ? obj._original_src : obj.src;
         // respect PNG fix on IE browsers
         if (obj.runtimeStyle && obj.runtimeStyle.filter && obj.runtimeStyle.filter.match(/src=['"]([^'"]+)['"]/))
@@ -5220,7 +5402,7 @@
         button.pas = String(obj.className);
 
       // set image according to button state
-      if (obj && button.type=='image' && button[state]) {
+      if (obj && button.type == 'image' && button[state]) {
         button.status = state;
         obj.src = button[state];
       }
@@ -5318,22 +5500,6 @@
     }
   };
 
-  this.focus_textfield = function(elem)
-  {
-    elem._hasfocus = true;
-    var $elem = $(elem);
-    if ($elem.hasClass('placeholder') || $elem.val() == elem._placeholder)
-      $elem.val('').removeClass('placeholder').attr('spellcheck', true);
-  };
-
-  this.blur_textfield = function(elem)
-  {
-    elem._hasfocus = false;
-    var $elem = $(elem);
-    if (elem._placeholder && (!$elem.val() || $elem.val() == elem._placeholder))
-      $elem.addClass('placeholder').attr('spellcheck', false).val(elem._placeholder);
-  };
-
   // write to the document/window title
   this.set_pagetitle = function(title)
   {
@@ -5383,7 +5549,7 @@
       }
       // add element and set timeout
       this.messages[key].elements.push(id);
-      window.setTimeout(function() { ref.hide_message(id, type == 'loading'); }, timeout);
+      setTimeout(function() { ref.hide_message(id, type == 'loading'); }, timeout);
       return id;
     }
 
@@ -5400,8 +5566,10 @@
       obj.click(function() { return ref.hide_message(obj); });
     }
 
+    this.triggerEvent('message', { message:msg, type:type, timeout:timeout, object:obj });
+
     if (timeout > 0)
-      window.setTimeout(function() { ref.hide_message(id, type == 'loading'); }, timeout);
+      setTimeout(function() { ref.hide_message(id, type == 'loading'); }, timeout);
     return id;
   };
 
@@ -5448,6 +5616,23 @@
         }
       }
     }
+  };
+
+  // remove all messages immediately
+  this.clear_messages = function()
+  {
+    // pass command to parent window
+    if (this.is_framed())
+      return parent.rcmail.clear_messages();
+
+    var k, n, m = this.messages;
+
+    for (k in m)
+      for (n in m[k].elements)
+        if (m[k].obj)
+          m[k].obj.hide();
+
+    this.messages = {};
   };
 
   // mark a mailbox as selected and set environment variable
@@ -5578,13 +5763,11 @@
   // replace content of quota display
   this.set_quota = function(content)
   {
-    if (content && this.gui_objects.quotadisplay) {
-      if (typeof content === 'object' && content.type == 'image')
-        this.percent_indicator(this.gui_objects.quotadisplay, content);
-      else
-        $(this.gui_objects.quotadisplay).html(content.percent+'%').attr('title', content.title);
-    }
+    if (this.gui_objects.quotadisplay && content && content.type == 'text')
+      $(this.gui_objects.quotadisplay).html(content.percent+'%').attr('title', content.title);
+
     this.triggerEvent('setquota', content);
+    this.env.quota_content = content;
   };
 
   // update the mailboxlist
@@ -5666,96 +5849,33 @@
   };
 
   // display all-headers row and fetch raw message headers
-  this.load_headers = function(elem)
+  this.show_headers = function(props, elem)
   {
     if (!this.gui_objects.all_headers_row || !this.gui_objects.all_headers_box || !this.env.uid)
       return;
 
     $(elem).removeClass('show-headers').addClass('hide-headers');
     $(this.gui_objects.all_headers_row).show();
-    elem.onclick = function() { rcmail.hide_headers(elem); };
+    elem.onclick = function() { rcmail.command('hide-headers', '', elem); };
 
     // fetch headers only once
     if (!this.gui_objects.all_headers_box.innerHTML) {
       var lock = this.display_message(this.get_label('loading'), 'loading');
-      this.http_post('headers', '_uid='+this.env.uid, lock);
+      this.http_post('headers', {_uid: this.env.uid}, lock);
     }
   };
 
   // hide all-headers row
-  this.hide_headers = function(elem)
+  this.hide_headers = function(props, elem)
   {
     if (!this.gui_objects.all_headers_row || !this.gui_objects.all_headers_box)
       return;
 
     $(elem).removeClass('hide-headers').addClass('show-headers');
     $(this.gui_objects.all_headers_row).hide();
-    elem.onclick = function() { rcmail.load_headers(elem); };
+    elem.onclick = function() { rcmail.command('show-headers', '', elem); };
   };
 
-  // percent (quota) indicator
-  this.percent_indicator = function(obj, data)
-  {
-    if (!data || !obj)
-      return false;
-
-    var limit_high = 80,
-      limit_mid  = 55,
-      width = data.width ? data.width : this.env.indicator_width ? this.env.indicator_width : 100,
-      height = data.height ? data.height : this.env.indicator_height ? this.env.indicator_height : 14,
-      quota = data.percent ? Math.abs(parseInt(data.percent)) : 0,
-      quota_width = parseInt(quota / 100 * width),
-      pos = $(obj).position();
-
-    // workarounds for Opera and Webkit bugs
-    pos.top = Math.max(0, pos.top);
-    pos.left = Math.max(0, pos.left);
-
-    this.env.indicator_width = width;
-    this.env.indicator_height = height;
-
-    // overlimit
-    if (quota_width > width) {
-      quota_width = width;
-      quota = 100; 
-    }
-
-    if (data.title)
-      data.title = this.get_label('quota') + ': ' +  data.title;
-
-    // main div
-    var main = $('<div>');
-    main.css({position: 'absolute', top: pos.top, left: pos.left,
-	    width: width + 'px', height: height + 'px', zIndex: 100, lineHeight: height + 'px'})
-	  .attr('title', data.title).addClass('quota_text').html(quota + '%');
-    // used bar
-    var bar1 = $('<div>');
-    bar1.css({position: 'absolute', top: pos.top + 1, left: pos.left + 1,
-	    width: quota_width + 'px', height: height + 'px', zIndex: 99});
-    // background
-    var bar2 = $('<div>');
-    bar2.css({position: 'absolute', top: pos.top + 1, left: pos.left + 1,
-	    width: width + 'px', height: height + 'px', zIndex: 98})
-	  .addClass('quota_bg');
-
-    if (quota >= limit_high) {
-      main.addClass(' quota_text_high');
-      bar1.addClass('quota_high');
-    }
-    else if(quota >= limit_mid) {
-      main.addClass(' quota_text_mid');
-      bar1.addClass('quota_mid');
-    }
-    else {
-      main.addClass(' quota_text_low');
-      bar1.addClass('quota_low');
-    }
-
-    // replace quota image
-    $(obj).html('').append(bar1).append(bar2).append(main);
-    // update #quotaimg title
-    $('#quotaimg').attr('title', data.title);
-  };
 
   /********************************************************/
   /*********  html to text conversion functions   *********/
@@ -5805,7 +5925,7 @@
     else
       query._action = this.env.action;
 
-    var base = this.env.comm_path;
+    var base = this.env.comm_path, k, param = {};
 
     // overwrite task name
     if (query._action.match(/([a-z]+)\/([a-z0-9-_.]+)/)) {
@@ -5814,8 +5934,7 @@
     }
 
     // remove undefined values
-    var param = {};
-    for (var k in query) {
+    for (k in query) {
       if (query[k] !== undefined && query[k] !== null)
         param[k] = query[k];
     }
@@ -5843,6 +5962,9 @@
   {
     if (frame)
       this.lock_frame();
+
+    if (typeof url == 'object')
+      url = this.env.comm_path + '&' + $.param(url);
 
     // simulate real link click to force IE to send referer header
     if (bw.ie && target == window)
@@ -5875,7 +5997,7 @@
     return $.ajax({
       type: 'GET', url: url, data: { _unlock:(lock?lock:0) }, dataType: 'json',
       success: function(data){ ref.http_response(data); },
-      error: function(o, status, err) { rcmail.http_error(o, status, err, lock); }
+      error: function(o, status, err) { ref.http_error(o, status, err, lock, action); }
     });
   };
 
@@ -5907,7 +6029,7 @@
     return $.ajax({
       type: 'POST', url: url, data: postdata, dataType: 'json',
       success: function(data){ ref.http_response(data); },
-      error: function(o, status, err) { rcmail.http_error(o, status, err, lock); }
+      error: function(o, status, err) { ref.http_error(o, status, err, lock, action); }
     });
   };
 
@@ -6013,7 +6135,7 @@
           this.enable_command('purge', this.purge_mailbox_test());
           this.enable_command('expand-all', 'expand-unread', 'collapse-all', this.env.threading && this.env.messagecount);
 
-          if (response.action == 'list' || response.action == 'search') {
+          if ((response.action == 'list' || response.action == 'search') && this.message_list) {
             this.msglist_select(this.message_list);
             this.triggerEvent('listupdate', { folder:this.env.mailbox, rowcount:this.message_list.rowcount });
           }
@@ -6039,7 +6161,7 @@
   };
 
   // handle HTTP request errors
-  this.http_error = function(request, status, err, lock)
+  this.http_error = function(request, status, err, lock, action)
   {
     var errmsg = request.statusText;
 
@@ -6048,6 +6170,16 @@
 
     if (request.status && errmsg)
       this.display_message(this.get_label('servererror') + ' (' + errmsg + ')', 'error');
+    else if (status == 'timeout')
+      this.display_message(this.get_label('requesttimedout'), 'error');
+    else if (request.status == 0 && status != 'abort')
+      this.display_message(this.get_label('servererror') + ' (No connection)', 'error');
+
+    // re-send keep-alive requests after 30 seconds
+    if (action == 'keep-alive')
+      setTimeout(function(){ ref.keep_alive(); }, 30000);
+    else if (action == 'check-recent')
+      setTimeout(function(){ ref.check_for_recent(false); }, 30000);
   };
 
   // post the given form to a hidden iframe
@@ -6098,15 +6230,133 @@
     return frame_name;
   };
 
+  // html5 file-drop API
+  this.document_drag_hover = function(e, over)
+  {
+    e.preventDefault();
+    $(ref.gui_objects.filedrop)[(over?'addClass':'removeClass')]('active');
+  };
+
+  this.file_drag_hover = function(e, over)
+  {
+    e.preventDefault();
+    e.stopPropagation();
+    $(ref.gui_objects.filedrop)[(over?'addClass':'removeClass')]('hover');
+  };
+
+  // handler when files are dropped to a designated area.
+  // compose a multipart form data and submit it to the server
+  this.file_dropped = function(e)
+  {
+    // abort event and reset UI
+    this.file_drag_hover(e, false);
+
+    // prepare multipart form data composition
+    var files = e.target.files || e.dataTransfer.files,
+      formdata = window.FormData ? new FormData() : null,
+      fieldname = this.env.filedrop.fieldname || '_file',
+      boundary = '------multipartformboundary' + (new Date).getTime(),
+      dashdash = '--', crlf = '\r\n',
+      multipart = dashdash + boundary + crlf;
+
+    if (!files || !files.length)
+      return;
+
+    // inline function to submit the files to the server
+    var submit_data = function() {
+      var multiple = files.length > 1,
+        ts = new Date().getTime(),
+        content = '<span>' + (multiple ? ref.get_label('uploadingmany') : files[0].name) + '</span>';
+
+      // add to attachments list
+      ref.add2attachment_list(ts, { name:'', html:content, classname:'uploading', complete:false });
+
+      // complete multipart content and post request
+      multipart += dashdash + boundary + dashdash + crlf;
+
+      $.ajax({
+        type: 'POST',
+        dataType: 'json',
+        url: ref.url(ref.env.filedrop.action||'upload', { _id:ref.env.compose_id||'', _uploadid:ts, _remote:1 }),
+        contentType: formdata ? false : 'multipart/form-data; boundary=' + boundary,
+        processData: false,
+        data: formdata || multipart,
+        beforeSend: function(xhr, s) { if (!formdata && xhr.sendAsBinary) xhr.send = xhr.sendAsBinary; },
+        success: function(data){ ref.http_response(data); },
+        error: function(o, status, err) { ref.http_error(o, status, err, null, 'attachment'); }
+      });
+    };
+
+    // get contents of all dropped files
+    var last = this.env.filedrop.single ? 0 : files.length - 1;
+    for (var i=0, f; i <= last && (f = files[i]); i++) {
+      if (!f.name) f.name = f.fileName;
+      if (!f.size) f.size = f.fileSize;
+      if (!f.type) f.type = 'application/octet-stream';
+
+      // binary encode file name
+      if (!formdata && /[^\x20-\x7E]/.test(f.name))
+        f.name_bin = unescape(encodeURIComponent(f.name));
+
+      if (this.env.filedrop.filter && !f.type.match(new RegExp(this.env.filedrop.filter))) {
+        // TODO: show message to user
+        continue;
+      }
+
+      // the easy way with FormData (FF4+, Chrome, Safari)
+      if (formdata) {
+        formdata.append(fieldname + '[]', f);
+        if (i == last)
+          return submit_data();
+      }
+      // use FileReader supporetd by Firefox 3.6
+      else if (window.FileReader) {
+        var reader = new FileReader();
+
+        // closure to pass file properties to async callback function
+        reader.onload = (function(file, i) {
+          return function(e) {
+            multipart += 'Content-Disposition: form-data; name="' + fieldname + '[]"';
+            multipart += '; filename="' + (f.name_bin || file.name) + '"' + crlf;
+            multipart += 'Content-Length: ' + file.size + crlf;
+            multipart += 'Content-Type: ' + file.type + crlf + crlf;
+            multipart += e.target.result + crlf;
+            multipart += dashdash + boundary + crlf;
+
+            if (i == last)  // we're done, submit the data
+              return submit_data();
+          }
+        })(f,i);
+        reader.readAsBinaryString(f);
+      }
+      // Firefox 3
+      else if (f.getAsBinary) {
+        multipart += 'Content-Disposition: form-data; name="' + fieldname + '[]"';
+        multipart += '; filename="' + (f.name_bin || f.name) + '"' + crlf;
+        multipart += 'Content-Length: ' + f.size + crlf;
+        multipart += 'Content-Type: ' + f.type + crlf + crlf;
+        multipart += f.getAsBinary() + crlf;
+        multipart += dashdash + boundary +crlf;
+
+        if (i == last)
+          return submit_data();
+      }
+    }
+  };
+
+
   // starts interval for keep-alive/check-recent signal
   this.start_keepalive = function()
   {
+    if (!this.env.keep_alive || this.env.framed)
+      return;
+
     if (this._int)
       clearInterval(this._int);
 
-    if (this.env.keep_alive && !this.env.framed && this.task == 'mail' && this.gui_objects.mailboxlist)
+    if (this.task == 'mail' && this.gui_objects.mailboxlist)
       this._int = setInterval(function(){ ref.check_for_recent(false); }, this.env.keep_alive * 1000);
-    else if (this.env.keep_alive && !this.env.framed && this.task != 'login' && this.env.action != 'print')
+    else if (this.task != 'login' && this.env.action != 'print')
       this._int = setInterval(function(){ ref.keep_alive(); }, this.env.keep_alive * 1000);
   };
 
@@ -6123,23 +6373,23 @@
     if (this.busy)
       return;
 
-    var lock, addurl = '_mbox=' + urlencode(this.env.mailbox);
+    var lock, url = {_mbox: this.env.mailbox};
 
     if (refresh) {
       lock = this.set_busy(true, 'checkingmail');
-      addurl += '&_refresh=1';
+      url._refresh = 1;
       // reset check-recent interval
       this.start_keepalive();
     }
 
     if (this.gui_objects.messagelist)
-      addurl += '&_list=1';
+      url._list = 1;
     if (this.gui_objects.quotadisplay)
-      addurl += '&_quota=1';
+      url._quota = 1;
     if (this.env.search_request)
-      addurl += '&_search=' + this.env.search_request;
+      url._search = this.env.search_request;
 
-    this.http_request('check-recent', addurl, lock);
+    this.http_request('check-recent', url, lock);
   };
 
 
@@ -6167,7 +6417,7 @@
       return obj.selectionEnd;
     else if (document.selection && document.selection.createRange) {
       var range = document.selection.createRange();
-      if (range.parentElement()!=obj)
+      if (range.parentElement() != obj)
         return 0;
 
       var gm = range.duplicate();
@@ -6225,6 +6475,125 @@
     }
   };
 
+  this.mailto_handler_uri = function()
+  {
+    return location.href.split('?')[0] + '?_task=mail&_action=compose&_to=%s';
+  };
+
+  this.register_protocol_handler = function(name)
+  {
+    try {
+      window.navigator.registerProtocolHandler('mailto', this.mailto_handler_uri(), name);
+    }
+    catch(e) {};
+  };
+
+  this.check_protocol_handler = function(name, elem)
+  {
+    var nav = window.navigator;
+    if (!nav
+      || (typeof nav.registerProtocolHandler != 'function')
+      || ((typeof nav.isProtocolHandlerRegistered == 'function')
+        && nav.isProtocolHandlerRegistered('mailto', this.mailto_handler_uri()) == 'registered')
+    )
+      $(elem).addClass('disabled');
+    else
+      $(elem).click(function() { rcmail.register_protocol_handler(name); return false; });
+  };
+
+  // Checks browser capabilities eg. PDF support, TIF support
+  this.browser_capabilities_check = function()
+  {
+    if (!this.env.browser_capabilities)
+      this.env.browser_capabilities = {};
+
+    if (this.env.browser_capabilities.pdf === undefined)
+      this.env.browser_capabilities.pdf = this.pdf_support_check();
+
+    if (this.env.browser_capabilities.flash === undefined)
+      this.env.browser_capabilities.flash = this.flash_support_check();
+
+    if (this.env.browser_capabilities.tif === undefined)
+      this.tif_support_check();
+  };
+
+  // Returns browser capabilities string
+  this.browser_capabilities = function()
+  {
+    if (!this.env.browser_capabilities)
+      return '';
+
+    var n, ret = [];
+
+    for (n in this.env.browser_capabilities)
+      ret.push(n + '=' + this.env.browser_capabilities[n]);
+
+    return ret.join();
+  };
+
+  this.tif_support_check = function()
+  {
+    var img = new Image();
+
+    img.onload = function() { rcmail.env.browser_capabilities.tif = 1; };
+    img.onerror = function() { rcmail.env.browser_capabilities.tif = 0; };
+    img.src = 'program/blank.tif';
+  };
+
+  this.pdf_support_check = function()
+  {
+    var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/pdf"] : {},
+      plugins = navigator.plugins,
+      len = plugins.length,
+      regex = /Adobe Reader|PDF|Acrobat/i;
+
+    if (plugin && plugin.enabledPlugin)
+        return 1;
+
+    if (window.ActiveXObject) {
+      try {
+        if (axObj = new ActiveXObject("AcroPDF.PDF"))
+          return 1;
+      }
+      catch (e) {}
+      try {
+        if (axObj = new ActiveXObject("PDF.PdfCtrl"))
+          return 1;
+      }
+      catch (e) {}
+    }
+
+    for (i=0; i<len; i++) {
+      plugin = plugins[i];
+      if (typeof plugin === 'String') {
+        if (regex.test(plugin))
+          return 1;
+      }
+      else if (plugin.name && regex.test(plugin.name))
+        return 1;
+    }
+
+    return 0;
+  };
+
+  this.flash_support_check = function()
+  {
+    var plugin = navigator.mimeTypes ? navigator.mimeTypes["application/x-shockwave-flash"] : {};
+
+    if (plugin && plugin.enabledPlugin)
+        return 1;
+
+    if (window.ActiveXObject) {
+      try {
+        if (axObj = new ActiveXObject("ShockwaveFlash.ShockwaveFlash"))
+          return 1;
+      }
+      catch (e) {}
+    }
+
+    return 0;
+  };
+
 }  // end object rcube_webmail
 
 
@@ -6259,4 +6628,3 @@
 rcube_webmail.prototype.addEventListener = rcube_event_engine.prototype.addEventListener;
 rcube_webmail.prototype.removeEventListener = rcube_event_engine.prototype.removeEventListener;
 rcube_webmail.prototype.triggerEvent = rcube_event_engine.prototype.triggerEvent;
-

--
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