From e8bcf08c72a18b3bf396e6448d6658227ecb46f2 Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Wed, 30 Apr 2014 10:21:29 -0400
Subject: [PATCH] 1. Prepare core and Larry skin for improved accessibility 2. Implement full keyboard navigation in main mail view

---
 program/js/app.js |  937 ++++++++++++++++++++++++++++++++++++++--------------------
 1 files changed, 613 insertions(+), 324 deletions(-)

diff --git a/program/js/app.js b/program/js/app.js
index f83caeb..b2c9209 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -1,23 +1,37 @@
-/*
- +-----------------------------------------------------------------------+
- | Roundcube Webmail Client Script                                       |
- |                                                                       |
- | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2013, The Roundcube Dev Team                       |
- | Copyright (C) 2011-2013, Kolab Systems AG                             |
- |                                                                       |
- | 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>                       |
- |          Aleksander 'A.L.E.C' Machniak <alec@alec.pl>                 |
- |          Charles McNulty <charles@charlesmcnulty.com>                 |
- +-----------------------------------------------------------------------+
- | Requires: jquery.js, common.js, list.js                               |
- +-----------------------------------------------------------------------+
-*/
+/**
+ * Roundcube Webmail Client Script
+ *
+ * This file is part of the Roundcube Webmail client
+ *
+ * @licstart  The following is the entire license notice for the
+ * JavaScript code in this file.
+ *
+ * Copyright (C) 2005-2014, The Roundcube Dev Team
+ * Copyright (C) 2011-2014, Kolab Systems AG
+ *
+ * The JavaScript code in this page is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GNU GPL) as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option)
+ * any later version.  The code is distributed WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.
+ *
+ * As additional permission under GNU GPL version 3 section 7, you
+ * may distribute non-source (e.g., minimized or compacted) forms of
+ * that code without the copy of the GNU GPL normally required by
+ * section 4, provided you include this license notice and a URL
+ * through which recipients can access the Corresponding Source.
+ *
+ * @licend  The above is the entire license notice
+ * for the JavaScript code in this file.
+ *
+ * @author Thomas Bruederli <roundcube@gmail.com>
+ * @author Aleksander 'A.L.E.C' Machniak <alec@alec.pl>
+ * @author Charles McNulty <charles@charlesmcnulty.com>
+ *
+ * @requires jquery.js, common.js, list.js
+ */
 
 function rcube_webmail()
 {
@@ -31,6 +45,7 @@
   this.onloads = [];
   this.messages = {};
   this.group2expand = {};
+  this.http_request_jobs = {};
 
   // webmail client settings
   this.dblclick_time = 500;
@@ -138,11 +153,11 @@
   // initialize webmail client
   this.init = function()
   {
-    var n, p = this;
+    var n;
     this.task = this.env.task;
 
     // check browser
-    if (!bw.dom || !bw.xmlhttp_test() || (bw.mz && bw.vendver < 1.9)) {
+    if (this.env.server_error != 409 && (!bw.dom || !bw.xmlhttp_test() || (bw.mz && bw.vendver < 1.9) || (bw.ie && bw.vendver < 7))) {
       this.goto_url('error', '_code=0x199');
       return;
     }
@@ -184,6 +199,9 @@
     this.enable_command('close', 'logout', 'mail', 'addressbook', 'settings', 'save-pref',
       'compose', 'undo', 'about', 'switch-task', 'menu-open', 'menu-save', true);
 
+    // set active task button
+    this.set_button(this.task, 'sel');
+
     if (this.env.permaurl)
       this.enable_command('permaurl', 'extwin', true);
 
@@ -199,23 +217,29 @@
             column_movable:this.env.col_movable, dblclick_time:this.dblclick_time
             });
           this.message_list
-            .addEventListener('initrow', function(o) { p.init_message_row(o); })
-            .addEventListener('dblclick', function(o) { p.msglist_dbl_click(o); })
-            .addEventListener('click', function(o) { p.msglist_click(o); })
-            .addEventListener('keypress', function(o) { p.msglist_keypress(o); })
-            .addEventListener('select', function(o) { p.msglist_select(o); })
-            .addEventListener('dragstart', function(o) { p.drag_start(o); })
-            .addEventListener('dragmove', function(e) { p.drag_move(e); })
-            .addEventListener('dragend', function(e) { p.drag_end(e); })
-            .addEventListener('expandcollapse', function(o) { p.msglist_expand(o); })
-            .addEventListener('column_replace', function(o) { p.msglist_set_coltypes(o); })
-            .addEventListener('listupdate', function(o) { p.triggerEvent('listupdate', o); })
+            .addEventListener('initrow', function(o) { ref.init_message_row(o); })
+            .addEventListener('dblclick', function(o) { ref.msglist_dbl_click(o); })
+            .addEventListener('click', function(o) { ref.msglist_click(o); })
+            .addEventListener('keypress', function(o) { ref.msglist_keypress(o); })
+            .addEventListener('select', function(o) { ref.msglist_select(o); })
+            .addEventListener('dragstart', function(o) { ref.drag_start(o); })
+            .addEventListener('dragmove', function(e) { ref.drag_move(e); })
+            .addEventListener('dragend', function(e) { ref.drag_end(e); })
+            .addEventListener('expandcollapse', function(o) { ref.msglist_expand(o); })
+            .addEventListener('column_replace', function(o) { ref.msglist_set_coltypes(o); })
+            .addEventListener('listupdate', function(o) { ref.triggerEvent('listupdate', o); })
             .init();
 
-          document.onmouseup = function(e){ return p.doc_mouse_up(e); };
-          this.gui_objects.messagelist.parentNode.onmousedown = function(e){ return p.click_on_list(e); };
+          // TODO: this should go into the list-widget code
+          $(this.message_list.thead).on('click', 'a.sortcol', function(e){
+            return ref.command('sort', $(this).attr('rel'), this);
+          });
+
+          document.onmouseup = function(e){ return ref.doc_mouse_up(e); };
+          this.gui_objects.messagelist.parentNode.onclick = function(e){ return ref.click_on_list(e || window.event); };
 
           this.enable_command('toggle_status', 'toggle_flag', 'sort', true);
+          this.enable_command('set-listmode', this.env.threads && !this.is_multifolder_listing());
 
           // load messages
           this.command('list');
@@ -288,7 +312,7 @@
             }
           }
 
-          document.onmouseup = function(e){ return p.doc_mouse_up(e); };
+          document.onmouseup = function(e){ return ref.doc_mouse_up(e); };
 
           // init message compose form
           this.init_messageform();
@@ -315,7 +339,7 @@
           this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
             { multiselect:true, draggable:false, keyboard:false });
           this.contact_list
-            .addEventListener('initrow', function(o) { p.triggerEvent('insertrow', { cid:o.uid, row:o }); })
+            .addEventListener('initrow', function(o) { ref.triggerEvent('insertrow', { cid:o.uid, row:o }); })
             .addEventListener('select', function(o) { ref.compose_recipient_select(o); })
             .addEventListener('dblclick', function(o) { ref.compose_add_recipient('to'); })
             .init();
@@ -356,21 +380,21 @@
           this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
             {multiselect:true, draggable:this.gui_objects.folderlist?true:false, keyboard:true});
           this.contact_list
-            .addEventListener('initrow', function(o) { p.triggerEvent('insertrow', { cid:o.uid, row:o }); })
-            .addEventListener('keypress', function(o) { p.contactlist_keypress(o); })
-            .addEventListener('select', function(o) { p.contactlist_select(o); })
-            .addEventListener('dragstart', function(o) { p.drag_start(o); })
-            .addEventListener('dragmove', function(e) { p.drag_move(e); })
-            .addEventListener('dragend', function(e) { p.drag_end(e); })
+            .addEventListener('initrow', function(o) { ref.triggerEvent('insertrow', { cid:o.uid, row:o }); })
+            .addEventListener('keypress', function(o) { ref.contactlist_keypress(o); })
+            .addEventListener('select', function(o) { ref.contactlist_select(o); })
+            .addEventListener('dragstart', function(o) { ref.drag_start(o); })
+            .addEventListener('dragmove', function(e) { ref.drag_move(e); })
+            .addEventListener('dragend', function(e) { ref.drag_end(e); })
             .init();
 
           if (this.env.cid)
             this.contact_list.highlight_row(this.env.cid);
 
-          this.gui_objects.contactslist.parentNode.onmousedown = function(e){ return p.click_on_list(e); };
-          document.onmouseup = function(e){ return p.doc_mouse_up(e); };
+          this.gui_objects.contactslist.parentNode.onmousedown = function(e){ return ref.click_on_list(e); };
+          document.onmouseup = function(e){ return ref.doc_mouse_up(e); };
 
-          $(this.gui_objects.qsearchbox).focusin(function() { rcmail.contact_list.blur(); });
+          $(this.gui_objects.qsearchbox).focusin(function() { ref.contact_list.blur(); });
 
           this.update_group_commands();
           this.command('list');
@@ -422,7 +446,7 @@
           this.identity_list = new rcube_list_widget(this.gui_objects.identitieslist,
             {multiselect:false, draggable:false, keyboard:false});
           this.identity_list
-            .addEventListener('select', function(o) { p.identity_select(o); })
+            .addEventListener('select', function(o) { ref.identity_select(o); })
             .init()
             .focus();
 
@@ -432,7 +456,7 @@
         else if (this.gui_objects.sectionslist) {
           this.sections_list = new rcube_list_widget(this.gui_objects.sectionslist, {multiselect:false, draggable:false, keyboard:false});
           this.sections_list
-            .addEventListener('select', function(o) { p.section_select(o); })
+            .addEventListener('select', function(o) { ref.section_select(o); })
             .init()
             .focus();
         }
@@ -444,10 +468,10 @@
           this.responses_list
             .addEventListener('select', function(list) {
               var win, id = list.get_single_selection();
-              p.enable_command('delete', !!id && $.inArray(id, p.env.readonly_responses) < 0);
-              if (id && (win = p.get_frame_window(p.env.contentframe))) {
-                p.set_busy(true);
-                p.location_href({ _action:'edit-response', _key:id, _framed:1 }, win);
+              ref.enable_command('delete', !!id && $.inArray(id, ref.env.readonly_responses) < 0);
+              if (id && (win = ref.get_frame_window(ref.env.contentframe))) {
+                ref.set_busy(true);
+                ref.location_href({ _action:'edit-response', _key:id, _framed:1 }, win);
               }
             })
             .init()
@@ -466,7 +490,7 @@
           $('#rcmloginpwd').focus();
 
         // detect client timezone
-        if (window.jstz && !bw.ie6) {
+        if (window.jstz) {
           var timezone = jstz.determine();
           if (timezone.name())
             $('#rcmlogintz').val(timezone.name());
@@ -564,12 +588,13 @@
   // execute a specific command on the web client
   this.command = function(command, props, obj, event)
   {
-    var ret, uid, cid, url, flag;
+    var ret, uid, cid, url, flag, aborted = false;
 
     if (obj && obj.blur)
       obj.blur();
 
-    if (this.busy)
+    // do nothing if interface is locked by other command (with exception for searching reset)
+    if (this.busy && !(command == 'reset-search' && this.last_command == 'search'))
       return false;
 
     // let the browser handle this click (shift/ctrl usually opens the link in a new window/tab)
@@ -594,6 +619,8 @@
       // remove copy from local storage if compose screen is left intentionally
       this.remove_compose_data(this.env.compose_id);
     }
+
+    this.last_command = command;
 
     // process external commands
     if (typeof this.command_handlers[command] === 'function') {
@@ -650,11 +677,16 @@
           var form = this.gui_objects.messageform,
             win = this.open_window('');
 
-          this.save_compose_form_local();
-          $("input[name='_action']", form).val('compose');
-          form.action = this.url('mail/compose', { _id: this.env.compose_id, _extwin: 1 });
-          form.target = win.name;
-          form.submit();
+          if (win) {
+            this.save_compose_form_local();
+            $("input[name='_action']", form).val('compose');
+            form.action = this.url('mail/compose', { _id: this.env.compose_id, _extwin: 1 });
+            form.target = win.name;
+            form.submit();
+          }
+          else {
+            // this.display_message(this.get_label('windowopenerror'), 'error');
+          }
         }
         else {
           this.open_window(this.env.permaurl, true);
@@ -684,7 +716,7 @@
 
       case 'open':
         if (uid = this.get_single_uid()) {
-          obj.href = this.url('show', {_mbox: this.env.mailbox, _uid: uid});
+          obj.href = this.url('show', {_mbox: this.get_message_mailbox(uid), _uid: uid});
           return true;
         }
         break;
@@ -695,8 +727,17 @@
         break;
 
       case 'list':
-        if (props && props != '')
-          this.reset_qsearch();
+        // re-send search query for the selected folder
+        if (props && props != '' && this.env.search_request && this.gui_objects.qsearchbox.value) {
+          var oldmbox = this.env.search_scope == 'all' ? '*' : this.env.mailbox;
+          this.env.search_mods[props] = this.env.search_mods[oldmbox];  // copy search mods from active search
+          this.env.mailbox = props;
+          this.env.search_scope = 'sub';
+          this.qsearch(this.gui_objects.qsearchbox.value);
+          this.select_folder(this.env.mailbox, '', true);
+          break;
+        }
+
         if (this.env.action == 'compose' && this.env.extwin)
           window.close();
         else if (this.task == 'mail') {
@@ -705,6 +746,10 @@
         }
         else if (this.task == 'addressbook')
           this.list_contacts(props);
+        break;
+
+      case 'set-listmode':
+        this.set_list_options(null, undefined, undefined, props == 'threads' ? 1 : 0);
         break;
 
       case 'sort':
@@ -787,9 +832,9 @@
           this.load_contact(cid, 'edit');
         else if (this.task == 'settings' && props)
           this.load_identity(props, 'edit-identity');
-        else if (this.task == 'mail' && (cid = this.get_single_uid())) {
-          url = { _mbox: this.env.mailbox };
-          url[this.env.mailbox == this.env.drafts_mailbox && props != 'new' ? '_draft_uid' : '_uid'] = cid;
+        else if (this.task == 'mail' && (uid = this.get_single_uid())) {
+          url = { _mbox: this.get_message_mailbox(uid) };
+          url[this.env.mailbox == this.env.drafts_mailbox && props != 'new' ? '_draft_uid' : '_uid'] = uid;
           this.open_compose_step(url);
         }
         break;
@@ -1049,7 +1094,11 @@
         // Reset the auto-save timer
         clearTimeout(this.save_timer);
 
-        this.upload_file(props || this.gui_objects.uploadform, 'upload');
+        if (!(flag = this.upload_file(props || this.gui_objects.uploadform, 'upload'))) {
+          if (flag !== false)
+            alert(this.get_label('selectimportfile'));
+          aborted = true;
+        }
         break;
 
       case 'insert-sig':
@@ -1069,7 +1118,7 @@
       case 'reply-list':
       case 'reply':
         if (uid = this.get_single_uid()) {
-          url = {_reply_uid: uid, _mbox: this.env.mailbox};
+          url = {_reply_uid: uid, _mbox: this.get_message_mailbox(uid)};
           if (command == 'reply-all')
             // do reply-list, when list is detected and popup menu wasn't used
             url._all = (!props && this.env.reply_all_mode == 1 && this.commands['reply-list'] ? 'list' : 'all');
@@ -1085,7 +1134,7 @@
       case 'forward':
         var uids = this.env.uid ? [this.env.uid] : (this.message_list ? this.message_list.get_selection() : []);
         if (uids.length) {
-          url = { _forward_uid: this.uids_to_list(uids), _mbox: this.env.mailbox };
+          url = { _forward_uid: this.uids_to_list(uids), _mbox: this.env.mailbox, _search: this.env.search_request };
           if (command == 'forward-attachment' || (!props && this.env.forward_attachment) || uids.length > 1)
             url._attachment = 1;
           this.open_compose_step(url);
@@ -1097,7 +1146,7 @@
           this.gui_objects.messagepartframe.contentWindow.print();
         }
         else if (uid = this.get_single_uid()) {
-          ref.printwin = this.open_window(this.env.comm_path+'&_action=print&_uid='+uid+'&_mbox='+urlencode(this.env.mailbox)+(this.env.safemode ? '&_safe=1' : ''), true, true);
+          ref.printwin = this.open_window(this.env.comm_path+'&_action=print&_uid='+uid+'&_mbox='+urlencode(this.get_message_mailbox(uid))+(this.env.safemode ? '&_safe=1' : ''), true, true);
           if (this.printwin) {
             if (this.env.action != 'show')
               this.mark_message('read', uid);
@@ -1114,8 +1163,9 @@
         if (this.env.action == 'get') {
           location.href = location.href.replace(/_frame=/, '_download=');
         }
-        else if (uid = this.get_single_uid())
-          this.goto_url('viewsource', { _uid: uid, _mbox: this.env.mailbox, _save: 1 });
+        else if (uid = this.get_single_uid()) {
+          this.goto_url('viewsource', { _uid: uid, _mbox: this.get_message_mailbox(uid), _save: 1 });
+        }
         break;
 
       // quicksearch
@@ -1171,9 +1221,17 @@
         break;
 
       case 'import-messages':
-        var form = props || this.gui_objects.importform;
-        $('input[name="_unlock"]', form).val(this.set_busy(true, 'importwait'));
-        this.upload_file(form, 'import');
+        var form = props || this.gui_objects.importform,
+          importlock = this.set_busy(true, 'importwait');
+
+        $('input[name="_unlock"]', form).val(importlock);
+
+        if (!(flag = this.upload_file(form, 'import'))) {
+          this.set_busy(false, null, importlock);
+          if (flag !== false)
+            alert(this.get_label('selectimportfile'));
+          aborted = true;
+        }
         break;
 
       case 'import':
@@ -1181,6 +1239,7 @@
           var file = document.getElementById('rcmimportfile');
           if (file && !file.value) {
             alert(this.get_label('selectimportfile'));
+            aborted = true;
             break;
           }
           this.gui_objects.importform.submit();
@@ -1232,9 +1291,9 @@
         break;
     }
 
-    if (this.triggerEvent('after'+command, props) === false)
+    if (!aborted && this.triggerEvent('after'+command, props) === false)
       ret = false;
-    this.triggerEvent('actionafter', {props:props, action:command});
+    this.triggerEvent('actionafter', { props:props, action:command, aborted:aborted });
 
     return ret === false ? false : obj ? false : true;
   };
@@ -1260,6 +1319,11 @@
       }
     }
   };
+
+  this.command_enabled = function(cmd)
+  {
+    return this.commands[cmd];
+  }
 
   // lock/unlock interface
   this.set_busy = function(a, message, id)
@@ -1434,11 +1498,31 @@
 
   this.drag_end = function(e)
   {
-    this.drag_active = false;
-    this.env.last_folder_target = null;
+    var list, model;
 
     if (this.treelist)
       this.treelist.drag_end();
+
+    // execute drag & drop action when mouse was released
+    if (list = this.message_list)
+      model = this.env.mailboxes;
+    else if (list = this.contact_list)
+      model = this.env.contactfolders;
+
+    if (this.drag_active && model && this.env.last_folder_target) {
+      var target = model[this.env.last_folder_target];
+      list.draglayer.hide();
+
+      if (this.contact_list) {
+        if (!this.contacts_drag_menu(e, target))
+          this.command('move', target);
+      }
+      else if (!this.drag_menu(e, target))
+        this.command('move', target);
+    }
+
+    this.drag_active = false;
+    this.env.last_folder_target = null;
   };
 
   this.drag_move = function(e)
@@ -1499,37 +1583,15 @@
 
   this.doc_mouse_up = function(e)
   {
-    var model, list, id;
+    var list, id;
 
     // ignore event if jquery UI dialog is open
     if ($(rcube_event.get_target(e)).closest('.ui-dialog, .ui-widget-overlay').length)
       return;
 
-    if (list = this.message_list)
-      model = this.env.mailboxes;
-    else if (list = this.contact_list)
-      model = this.env.contactfolders;
-    else if (this.ksearch_value)
-      this.ksearch_blur();
-
+    list = this.message_list || this.contact_list;
     if (list && !rcube_mouse_is_over(e, list.list.parentNode))
       list.blur();
-
-    // handle mouse release when dragging
-    if (this.drag_active && model && this.env.last_folder_target) {
-      var target = model[this.env.last_folder_target];
-
-      this.env.last_folder_target = null;
-      list.draglayer.hide();
-      this.drag_end(e);
-
-      if (this.contact_list) {
-        if (!this.contacts_drag_menu(e, target))
-          this.command('move', target);
-      }
-      else if (!this.drag_menu(e, target))
-        this.command('move', target);
-    }
 
     // reset 'pressed' buttons
     if (this.buttons_sel) {
@@ -1546,9 +1608,9 @@
       this.gui_objects.qsearchbox.blur();
 
     if (this.message_list)
-      this.message_list.focus();
+      this.message_list.focus(e);
     else if (this.contact_list)
-      this.contact_list.focus();
+      this.contact_list.focus(e);
 
     return true;
   };
@@ -1618,7 +1680,7 @@
 
     var uid = list.get_single_selection();
 
-    if (uid && this.env.mailbox == this.env.drafts_mailbox)
+    if (uid && (this.env.messages[uid].mbox || this.env.mailbox) == this.env.drafts_mailbox)
       this.open_compose_step({ _draft_uid: uid, _mbox: this.env.mailbox });
     else if (uid)
       this.show_message(uid, false, false);
@@ -1659,28 +1721,30 @@
   {
     var i, found, name, cols = list.thead.rows[0].cells;
 
-    this.env.coltypes = [];
+    this.env.listcols = [];
 
     for (i=0; i<cols.length; i++)
       if (cols[i].id && cols[i].id.startsWith('rcm')) {
         name = cols[i].id.slice(3);
-        this.env.coltypes.push(name);
+        this.env.listcols.push(name);
       }
 
-    if ((found = $.inArray('flag', this.env.coltypes)) >= 0)
+    if ((found = $.inArray('flag', this.env.listcols)) >= 0)
       this.env.flagged_col = found;
 
-    if ((found = $.inArray('subject', this.env.coltypes)) >= 0)
+    if ((found = $.inArray('subject', this.env.listcols)) >= 0)
       this.env.subject_col = found;
 
-    this.command('save-pref', { name: 'list_cols', value: this.env.coltypes, session: 'list_attrib/columns' });
+    this.command('save-pref', { name: 'list_cols', value: this.env.listcols, session: 'list_attrib/columns' });
   };
 
   this.check_droptarget = function(id)
   {
     switch (this.task) {
       case 'mail':
-        return (this.env.mailboxes[id] && this.env.mailboxes[id].id != this.env.mailbox && !this.env.mailboxes[id].virtual) ? 1 : 0;
+        return (this.env.mailboxes[id]
+            && !this.env.mailboxes[id].virtual
+            && (this.env.mailboxes[id].id != this.env.mailbox || this.is_multifolder_listing())) ? 1 : 0;
 
       case 'settings':
         return id != this.env.mailbox ? 1 : 0;
@@ -1749,31 +1813,31 @@
 
   this.init_message_row = function(row)
   {
-    var i, fn = {}, self = this, uid = row.uid,
-      status_icon = (this.env.status_col != null ? 'status' : 'msg') + 'icn' + row.uid;
+    var i, fn = {}, uid = row.uid,
+      status_icon = (this.env.status_col != null ? 'status' : 'msg') + 'icn' + row.id;
 
     if (uid && this.env.messages[uid])
       $.extend(row, this.env.messages[uid]);
 
     // set eventhandler to status icon
     if (row.icon = document.getElementById(status_icon)) {
-      fn.icon = function(e) { self.command('toggle_status', uid); };
+      fn.icon = function(e) { ref.command('toggle_status', uid); };
     }
 
     // save message icon position too
     if (this.env.status_col != null)
-      row.msgicon = document.getElementById('msgicn'+row.uid);
+      row.msgicon = document.getElementById('msgicn'+row.id);
     else
       row.msgicon = row.icon;
 
     // set eventhandler to flag icon
-    if (this.env.flagged_col != null && (row.flagicon = document.getElementById('flagicn'+row.uid))) {
-      fn.flagicon = function(e) { self.command('toggle_flag', uid); };
+    if (this.env.flagged_col != null && (row.flagicon = document.getElementById('flagicn'+row.id))) {
+      fn.flagicon = function(e) { ref.command('toggle_flag', uid); };
     }
 
     // set event handler to thread expand/collapse icon
-    if (!row.depth && row.has_children && (row.expando = document.getElementById('rcmexpando'+row.uid))) {
-      fn.expando = function(e) { self.expand_message_row(e, uid); };
+    if (!row.depth && row.has_children && (row.expando = document.getElementById('rcmexpando'+row.id))) {
+      fn.expando = function(e) { ref.expand_message_row(e, uid); };
     }
 
     // attach events
@@ -1819,6 +1883,7 @@
       selected: this.select_all_mode || this.message_list.in_selection(uid),
       ml: flags.ml?1:0,
       ctype: flags.ctype,
+      mbox: flags.mbox,
       // flags from plugins
       flags: flags.extra_flags
     });
@@ -1833,7 +1898,7 @@
         + (flags.deleted ? ' deleted' : '')
         + (flags.flagged ? ' flagged' : '')
         + (message.selected ? ' selected' : ''),
-      row = { cols:[], style:{}, id:'rcmrow'+uid };
+      row = { cols:[], style:{}, id:'rcmrow'+this.html_identifier(uid,true), uid:uid };
 
     // message status icons
     css_class = 'msgicon';
@@ -1859,7 +1924,7 @@
     if (this.env.threading) {
       if (message.depth) {
         // This assumes that div width is hardcoded to 15px,
-        tree += '<span id="rcmtab' + uid + '" class="branch" style="width:' + (message.depth * 15) + 'px;">&nbsp;&nbsp;</span>';
+        tree += '<span id="rcmtab' + row.id + '" class="branch" style="width:' + (message.depth * 15) + 'px;">&nbsp;&nbsp;</span>';
 
         if ((rows[message.parent_uid] && rows[message.parent_uid].expanded === false)
           || ((this.env.autoexpand_threads == 0 || this.env.autoexpand_threads == 2) &&
@@ -1878,7 +1943,7 @@
           message.expanded = true;
         }
 
-        expando = '<div id="rcmexpando' + uid + '" class="' + (message.expanded ? 'expanded' : 'collapsed') + '">&nbsp;&nbsp;</div>';
+        expando = '<div id="rcmexpando' + row.id + '" class="' + (message.expanded ? 'expanded' : 'collapsed') + '">&nbsp;&nbsp;</div>';
         row_class += ' thread' + (message.expanded? ' expanded' : '');
       }
 
@@ -1886,28 +1951,36 @@
         row_class += ' unroot';
     }
 
-    tree += '<span id="msgicn'+uid+'" class="'+css_class+'">&nbsp;</span>';
+    tree += '<span id="msgicn'+row.id+'" class="'+css_class+'">&nbsp;</span>';
     row.className = row_class;
 
-    // build subject link 
-    if (!bw.ie && cols.subject) {
-      var action = flags.mbox == this.env.drafts_mailbox ? 'compose' : 'show';
-      var uid_param = flags.mbox == this.env.drafts_mailbox ? '_draft_uid' : '_uid';
-      cols.subject = '<a href="./?_task=mail&_action='+action+'&_mbox='+urlencode(flags.mbox)+'&'+uid_param+'='+uid+'"'+
-        ' onclick="return rcube_event.cancel(event)" onmouseover="rcube_webmail.long_subject_title(this,'+(message.depth+1)+')">'+cols.subject+'</a>';
+    // build subject link
+    if (cols.subject) {
+      var action  = flags.mbox == this.env.drafts_mailbox ? 'compose' : 'show',
+        uid_param = flags.mbox == this.env.drafts_mailbox ? '_draft_uid' : '_uid',
+        query = { _mbox: flags.mbox };
+      query[uid_param] = uid;
+      cols.subject = '<a href="' + this.url(action, query) + '" onclick="return rcube_event.keyboard_only(event)"' +
+        ' onmouseover="rcube_webmail.long_subject_title(this,'+(message.depth+1)+')" tabindex="-1"><span>'+cols.subject+'</span></a>';
     }
 
     // add each submitted col
-    for (n in this.env.coltypes) {
-      c = this.env.coltypes[n];
-      col = { className: String(c).toLowerCase() };
+    for (n in this.env.listcols) {
+      c = this.env.listcols[n];
+      col = {className: String(c).toLowerCase(), events:{}};
+
+      if (this.env.coltypes[c] && this.env.coltypes[c].hidden) {
+        col.className += ' hidden';
+      }
 
       if (c == 'flag') {
         css_class = (flags.flagged ? 'flagged' : 'unflagged');
-        html = '<span id="flagicn'+uid+'" class="'+css_class+'">&nbsp;</span>';
+        html = '<span id="flagicn'+row.id+'" class="'+css_class+'">&nbsp;</span>';
       }
       else if (c == 'attachment') {
-        if (/application\/|multipart\/(m|signed)/.test(flags.ctype))
+        if (flags.attachmentClass)
+          html = '<span class="'+flags.attachmentClass+'">&nbsp;</span>';
+        else if (/application\/|multipart\/(m|signed)/.test(flags.ctype))
           html = '<span class="attachment">&nbsp;</span>';
         else if (/multipart\/report/.test(flags.ctype))
           html = '<span class="report">&nbsp;</span>';
@@ -1923,16 +1996,13 @@
           css_class = 'unreadchildren';
         else
           css_class = 'msgicon';
-        html = '<span id="statusicn'+uid+'" class="'+css_class+'">&nbsp;</span>';
+        html = '<span id="statusicn'+row.id+'" class="'+css_class+'">&nbsp;</span>';
       }
       else if (c == 'threads')
         html = expando;
       else if (c == 'subject') {
-        if (bw.ie) {
-          col.onmouseover = function() { rcube_webmail.long_subject_title_ex(this, message.depth+1); };
-          if (bw.ie8)
-            tree = '<span></span>' + tree; // #1487821
-        }
+        if (bw.ie)
+          col.events.mouseover = function() { rcube_webmail.long_subject_title_ex(this); };
         html = tree + cols[c];
       }
       else if (c == 'priority') {
@@ -1940,6 +2010,9 @@
           html = '<span class="prio'+flags.prio+'">&nbsp;</span>';
         else
           html = '&nbsp;';
+      }
+      else if (c == 'folder') {
+        html = '<span onmouseover="rcube_webmail.long_subject_title(this)">' + cols[c] + '<span>';
       }
       else
         html = cols[c];
@@ -1990,7 +2063,7 @@
 
     if (cols && cols.length) {
       // make sure new columns are added at the end of the list
-      var i, idx, name, newcols = [], oldcols = this.env.coltypes;
+      var i, idx, name, newcols = [], oldcols = this.env.listcols;
       for (i=0; i<oldcols.length; i++) {
         name = oldcols[i];
         idx = $.inArray(name, cols);
@@ -2021,7 +2094,7 @@
 
     var win, target = window,
       action = preview ? 'preview': 'show',
-      url = '&_action='+action+'&_uid='+id+'&_mbox='+urlencode(this.env.mailbox);
+      url = '&_action='+action+'&_uid='+id+'&_mbox='+urlencode(this.get_message_mailbox(id));
 
     if (preview && (win = this.get_frame_window(this.env.contentframe))) {
       target = win;
@@ -2138,7 +2211,7 @@
     var lock = this.set_busy(true, 'checkingmail'),
       params = this.check_recent_params();
 
-    this.http_request('check-recent', params, lock);
+    this.http_post('check-recent', params, lock);
   };
 
   // list messages of a specific mailbox using filter
@@ -2150,11 +2223,20 @@
 
     // reset vars
     this.env.current_page = 1;
+    this.env.search_filter = filter;
     this.http_request('search', this.search_params(false, filter), lock);
   };
 
+  // reload the current message listing
+  this.refresh_list = function()
+  {
+    this.list_mailbox(this.env.mailbox, this.env.current_page || 1, null, { _clear:1 }, true);
+    if (this.message_list)
+      this.message_list.clear_selection();
+  };
+
   // list messages of a specific mailbox
-  this.list_mailbox = function(mbox, page, sort, url)
+  this.list_mailbox = function(mbox, page, sort, url, update_only)
   {
     var win, target = window;
 
@@ -2179,15 +2261,17 @@
       this.select_all_mode = false;
     }
 
-    // unselect selected messages and clear the list and message data
-    this.clear_message_list();
+    if (!update_only) {
+      // unselect selected messages and clear the list and message data
+      this.clear_message_list();
 
-    if (mbox != this.env.mailbox || (mbox == this.env.mailbox && !page && !sort))
-      url._refresh = 1;
+      if (mbox != this.env.mailbox || (mbox == this.env.mailbox && !page && !sort))
+        url._refresh = 1;
 
-    this.select_folder(mbox, '', true);
-    this.unmark_folder(mbox, 'recent', '', true);
-    this.env.mailbox = mbox;
+      this.select_folder(mbox, '', true);
+      this.unmark_folder(mbox, 'recent', '', true);
+      this.env.mailbox = mbox;
+    }
 
     // load message list remotely
     if (this.gui_objects.messagelist) {
@@ -2221,20 +2305,17 @@
   };
 
   // send remote request to load message list
-  this.list_mailbox_remote = function(mbox, page, post_data)
+  this.list_mailbox_remote = function(mbox, page, url)
   {
-    // clear message list first
-    this.message_list.clear();
-
     var lock = this.set_busy(true, 'loading');
 
-    if (typeof post_data != 'object')
-      post_data = {};
-    post_data._mbox = mbox;
+    if (typeof url != 'object')
+      url = {};
+    url._mbox = mbox;
     if (page)
-      post_data._page = page;
+      url._page = page;
 
-    this.http_request('list', post_data, lock);
+    this.http_request('list', url, lock);
   };
 
   // removes messages that doesn't exists from list selection array
@@ -2386,7 +2467,7 @@
     }
 
     if (html)
-      $('#rcmtab'+uid).html(html);
+      $('#rcmtab'+this.html_identifier(uid, true)).html(html);
   };
 
   // update parent in a thread
@@ -2450,14 +2531,14 @@
 
         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.id).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')
-              .attr('id', 'rcmexpando' + r.uid)
+            $('#'+r.id+' .leaf:first')
+              .attr('id', 'rcmexpando' + r.id)
               .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); });
@@ -2651,7 +2732,7 @@
       return this.folder_selector(obj, function(folder) { ref.command('move', folder); });
 
     // exit if current or no mailbox specified
-    if (!mbox || mbox == this.env.mailbox)
+    if (!mbox || (mbox == this.env.mailbox && !this.is_multifolder_listing()))
       return;
 
     var lock = false, post_data = this.selection_post_data({_target_mbox: mbox});
@@ -2719,7 +2800,8 @@
   // @private
   this._with_selected_messages = function(action, post_data, lock)
   {
-    var count = 0, msg;
+    var count = 0, msg,
+      remove = (action == 'delete' || !this.is_multifolder_listing());
 
     // update the list (remove rows, clear selection)
     if (this.message_list) {
@@ -2736,10 +2818,11 @@
             roots.push(root);
           }
         }
-        this.message_list.remove_row(id, (this.env.display_next && n == selection.length-1));
+        if (remove)
+          this.message_list.remove_row(id, (this.env.display_next && n == selection.length-1));
       }
       // make sure there are no selected rows
-      if (!this.env.display_next)
+      if (!this.env.display_next && remove)
         this.message_list.clear_selection();
       // update thread tree icons
       for (n=0, len=roots.length; n<len; n++) {
@@ -2750,8 +2833,11 @@
     if (count < 0)
       post_data._count = (count*-1);
     // remove threads from the end of the list
-    else if (count > 0)
+    else if (count > 0 && remove)
       this.delete_excessive_thread_rows();
+
+    if (!remove)
+      post_data._refresh = 1;
 
     if (!lock) {
       msg = action == 'move' ? 'movingmessage' : 'deletingmessage';
@@ -2962,7 +3048,8 @@
     var icn_src, uid, i, len,
       rows = this.message_list ? this.message_list.rows : {};
 
-    uids = String(uids).split(',');
+    if (typeof uids == 'string')
+      uids = String(uids).split(',');
 
     for (i=0, len=uids.length; i<len; i++) {
       uid = uids[i];
@@ -2975,7 +3062,7 @@
   // with select_all mode checking
   this.uids_to_list = function(uids)
   {
-    return this.select_all_mode ? '*' : uids.join(',');
+    return this.select_all_mode ? '*' : (uids.length <= 1 ? uids.join(',') : uids);
   };
 
   // Sets title of the delete button
@@ -3048,8 +3135,8 @@
   // handler for keyboard events on the _user field
   this.login_user_keyup = function(e)
   {
-    var key = rcube_event.get_keycode(e);
-    var passwd = $('#rcmloginpwd');
+    var key = rcube_event.get_keycode(e),
+      passwd = $('#rcmloginpwd');
 
     // enter
     if (key == 13 && passwd.length && !passwd.val()) {
@@ -3096,7 +3183,12 @@
 
     // close compose step in opener
     if (opener_rc && opener_rc.env.action == 'compose') {
-      setTimeout(function(){ opener.history.back(); }, 100);
+      setTimeout(function(){
+        if (opener.history.length > 1)
+          opener.history.back();
+        else
+          opener_rc.redirect(opener_rc.get_task_url('mail'));
+      }, 100);
       this.env.opened_extwin = true;
     }
 
@@ -3139,6 +3231,10 @@
         }
         // skip records from 'other' drafts
         if (this.env.draft_id && formdata.draft_id && formdata.draft_id != this.env.draft_id) {
+          continue;
+        }
+        // skip records on reply
+        if (this.env.reply_msgid && formdata.reply_msgid != this.env.reply_msgid) {
           continue;
         }
         // show dialog asking to restore the message
@@ -3392,7 +3488,7 @@
     if ($("input[name='_is_html']").val() == '1') {
       var editor = tinyMCE.get(this.env.composebody);
       editor.getWin().focus(); // correct focus in IE & Chrome
-      editor.selection.setContent(insert, { format:'text' });
+      editor.selection.setContent(this.quote_html(insert).replace(/\r?\n/g, '<br/>'), { format:'text' });
     }
     // replace selection in compose textarea
     else {
@@ -3616,14 +3712,27 @@
       this.env.draft_id = id;
       $("input[name='_draft_saveid']").val(id);
 
-      this.remove_compose_data(this.env.compose_id);
+      // reset history of hidden iframe used for saving draft (#1489643)
+      // but don't do this on timer-triggered draft-autosaving (#1489789)
+      if (window.frames['savetarget'] && window.frames['savetarget'].history && !this.draft_autosave_submit) {
+        window.frames['savetarget'].history.back();
+      }
+
+      this.draft_autosave_submit = false;
     }
+
+    // always remove local copy upon saving as draft
+    this.remove_compose_data(this.env.compose_id);
   };
 
   this.auto_save_start = function()
   {
     if (this.env.draft_autosave)
-      this.save_timer = setTimeout(function(){ ref.command("savedraft"); }, this.env.draft_autosave * 1000);
+      this.draft_autosave_submit = false;
+      this.save_timer = setTimeout(function(){
+          ref.draft_autosave_submit = true;  // set auto-saved flag (#1489789)
+          ref.command("savedraft");
+      }, this.env.draft_autosave * 1000);
 
     // save compose form content to local storage every 5 seconds
     if (!this.local_save_timer && window.localStorage) {
@@ -3680,6 +3789,9 @@
 
     if (this.env.draft_id) {
       formdata.draft_id = this.env.draft_id;
+    }
+    if (this.env.reply_msgid) {
+      formdata.reply_msgid = this.env.reply_msgid;
     }
 
     $('input, select, textarea', this.gui_objects.messageform).each(function(i, elem) {
@@ -3766,9 +3878,9 @@
   this.clear_compose_data = function()
   {
     if (window.localStorage) {
-      var index = this.local_storage_get_item('compose.index', []);
+      var i, index = this.local_storage_get_item('compose.index', []);
 
-      for (var i=0; i < index.length; i++) {
+      for (i=0; i < index.length; i++) {
         this.local_storage_remove_item('compose.' + index[i]);
       }
       this.local_storage_remove_item('compose.index');
@@ -3939,7 +4051,7 @@
   this.upload_file = function(form, action)
   {
     if (!form)
-      return false;
+      return;
 
     // count files and size on capable browser
     var size = 0, numfiles = 0;
@@ -3960,7 +4072,7 @@
     if (numfiles) {
       if (this.env.max_filesize && this.env.filesizeerror && size > this.env.max_filesize) {
         this.display_message(this.env.filesizeerror, 'error');
-        return;
+        return false;
       }
 
       var frame_name = this.async_upload_form(form, action || 'upload', function(e) {
@@ -3994,11 +4106,11 @@
       if (this.env.upload_progress_time) {
         this.upload_progress_start('upload', ts);
       }
-    }
 
-    // set reference to the form object
-    this.gui_objects.attachmentform = form;
-    return true;
+      // set reference to the form object
+      this.gui_objects.attachmentform = form;
+      return true;
+    }
   };
 
   // add file name to attachment list
@@ -4020,7 +4132,7 @@
     li.attr('id', name)
       .addClass(att.classname)
       .html(att.html)
-      .on('mouseover', function() { rcube_webmail.long_subject_title_ex(this, 0); });
+      .on('mouseover', function() { rcube_webmail.long_subject_title_ex(this); });
 
     // replace indicator's li
     if (upload_id && (indicator = document.getElementById(upload_id))) {
@@ -4040,8 +4152,10 @@
 
   this.remove_from_attachment_list = function(name)
   {
-    delete this.env.attachments[name];
-    $('#'+name).remove();
+    if (this.env.attachments) {
+      delete this.env.attachments[name];
+      $('#'+name).remove();
+    }
   };
 
   this.remove_attachment = function(name)
@@ -4114,15 +4228,32 @@
       r = this.http_request(action, url, lock);
 
       this.env.qsearch = {lock: lock, request: r};
+      this.enable_command('set-listmode', this.env.threads && (this.env.search_scope || 'base') == 'base');
+
+      return true;
     }
+
+    return false;
+  };
+
+  this.continue_search = function(request_id)
+  {
+    var lock = ref.set_busy(true, 'stillsearching');
+
+    setTimeout(function(){
+      var url = ref.search_params();
+      url._continue = request_id;
+      ref.env.qsearch = { lock: lock, request: ref.http_request('search', url, lock) };
+    }, 100);
   };
 
   // build URL params for search
-  this.search_params = function(search, filter)
+  this.search_params = function(search, filter, smods)
   {
     var n, url = {}, mods_arr = [],
       mods = this.env.search_mods,
-      mbox = this.env.mailbox;
+      scope = this.env.search_scope || 'base',
+      mbox = scope == 'all' ? '*' : this.env.mailbox;
 
     if (!filter && this.gui_objects.search_filter)
       filter = this.gui_objects.search_filter.value;
@@ -4136,17 +4267,19 @@
     if (search) {
       url._q = search;
 
-      if (mods && this.message_list)
-        mods = mods[mbox] ? mods[mbox] : mods['*'];
+      if (!smods && mods && this.message_list)
+        smods = mods[mbox] || mods['*'];
 
-      if (mods) {
-        for (n in mods)
+      if (smods) {
+        for (n in smods)
           mods_arr.push(n);
         url._headers = mods_arr.join(',');
       }
     }
 
-    if (mbox)
+    if (scope)
+      url._scope = scope;
+    if (mbox && scope != 'all')
       url._mbox = mbox;
 
     return url;
@@ -4164,7 +4297,43 @@
     this.env.qsearch = null;
     this.env.search_request = null;
     this.env.search_id = null;
+
+    this.enable_command('set-listmode', this.env.threads);
   };
+
+  this.set_searchscope = function(scope)
+  {
+    var old = this.env.search_scope;
+    this.env.search_scope = scope;
+
+    // re-send search query with new scope
+    if (scope != old && this.env.search_request) {
+      if (!this.qsearch(this.gui_objects.qsearchbox.value) && this.env.search_filter && this.env.search_filter != 'ALL')
+        this.filter_mailbox(this.env.search_filter);
+      if (scope != 'all')
+        this.select_folder(this.env.mailbox, '', true);
+    }
+  };
+
+  this.set_searchmods = function(mods)
+  {
+    var mbox = rcmail.env.mailbox,
+      scope = this.env.search_scope || 'base';
+
+    if (scope == 'all')
+      mbox = '*';
+
+    if (!this.env.search_mods)
+      this.env.search_mods = {};
+
+    this.env.search_mods[mbox] = mods;
+  };
+
+  this.is_multifolder_listing = function()
+  {
+    return typeof this.env.multifolder_listing != 'undefined' ? this.env.multifolder_listing :
+      (this.env.search_request && (this.env.search_scope || 'base') != 'base');
+  }
 
   this.sent_successfully = function(type, msg, folders)
   {
@@ -4289,10 +4458,14 @@
     this.ksearch_destroy();
 
     // insert all members of a group
-    if (typeof this.env.contacts[id] === 'object' && this.env.contacts[id].id) {
+    if (typeof this.env.contacts[id] === 'object' && this.env.contacts[id].type == 'group') {
       insert += this.env.contacts[id].name + this.env.recipients_delimiter;
       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] === 'object' && this.env.contacts[id].name) {
+      insert = this.env.contacts[id].name + this.env.recipients_delimiter;
+      trigger = true;
     }
     else if (typeof this.env.contacts[id] === 'string') {
       insert = this.env.contacts[id] + this.env.recipients_delimiter;
@@ -4307,7 +4480,7 @@
       this.ksearch_input.setSelectionRange(cpos, cpos);
 
     if (trigger) {
-      this.triggerEvent('autocomplete_insert', { field:this.ksearch_input, insert:insert });
+      this.triggerEvent('autocomplete_insert', { field:this.ksearch_input, insert:insert, data:this.env.contacts[id] });
       this.compose_type_activity++;
     }
   };
@@ -4338,7 +4511,7 @@
       p = inp_value.lastIndexOf(this.env.recipients_separator, cpos-1),
       q = inp_value.substring(p+1, cpos),
       min = this.env.autocomplete_min_length,
-      ac = this.ksearch_data;
+      data = this.ksearch_data;
 
     // trim query string
     q = $.trim(q);
@@ -4365,34 +4538,26 @@
       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.startsWith(old_value) && (!ac || ac.num <= 0) && this.env.contacts && !this.env.contacts.length)
+    if (old_value && old_value.length && q.startsWith(old_value) && (!data || data.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';
+    var sources = props && props.sources ? props.sources : [''];
+    var reqid = this.multi_thread_http_request({
+      items: sources,
+      threads: props && props.threads ? props.threads : 1,
+      action:  props && props.action ? props.action : 'mail/autocomplete',
+      postdata: { _search:q, _source:'%s' },
+      lock: this.display_message(this.get_label('searching'), 'loading')
+    });
 
-    this.ksearch_data = {id: reqid, sources: sources.slice(), action: action,
-      locks: [], requests: [], num: sources.length};
-
-    for (i=0; i<threads; i++) {
-      source = this.ksearch_data.sources.shift();
-      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, post_data, lock);
-
-      this.ksearch_data.locks.push(lock);
-      this.ksearch_data.requests.push(xhr);
-    }
+    this.ksearch_data = { id:reqid, sources:sources.slice(), num:sources.length };
   };
 
   this.ksearch_query_results = function(results, search, reqid)
   {
+    // trigger multi-thread http response callback
+    this.multi_thread_http_response(results, reqid);
+
     // search stopped in meantime?
     if (!this.ksearch_value)
       return;
@@ -4402,9 +4567,8 @@
       return;
 
     // display search results
-    var i, len, ul, li, text, init,
+    var i, len, ul, li, text, type, init,
       value = this.ksearch_value,
-      data = this.ksearch_data,
       maxlen = this.env.autocomplete_max ? this.env.autocomplete_max : 15;
 
     // create results pane if not present
@@ -4436,11 +4600,13 @@
     if (results && (len = results.length)) {
       for (i=0; i < len && maxlen > 0; i++) {
         text = typeof results[i] === 'object' ? results[i].name : results[i];
+        type = typeof results[i] === 'object' ? results[i].type : '';
         li = document.createElement('LI');
         li.innerHTML = text.replace(new RegExp('('+RegExp.escape(value)+')', 'ig'), '##$1%%').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/##([^%]+)%%/g, '<b>$1</b>');
         li.onmouseover = function(){ ref.ksearch_select(this); };
         li.onmouseup = function(){ ref.ksearch_click(this) };
         li._rcm_id = this.env.contacts.length + i;
+        if (type) li.className = type;
         ul.appendChild(li);
         maxlen -= 1;
       }
@@ -4458,27 +4624,8 @@
     if (len)
       this.env.contacts = this.env.contacts.concat(results);
 
-    // run next parallel search
-    if (data.id == reqid) {
-      data.num--;
-      if (maxlen > 0 && data.sources.length) {
-        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, post_data, lock);
-
-          this.ksearch_data.locks.push(lock);
-          this.ksearch_data.requests.push(xhr);
-        }
-      }
-      else if (!maxlen) {
-        if (!this.ksearch_msg)
-          this.ksearch_msg = this.display_message(this.get_label('autocompletemore'));
-        // abort pending searches
-        this.ksearch_abort();
-      }
-    }
+    if (this.ksearch_data.id == reqid)
+      this.ksearch_data.num--;
   };
 
   this.ksearch_click = function(node)
@@ -4513,7 +4660,8 @@
   // Clears autocomplete data/requests
   this.ksearch_destroy = function()
   {
-    this.ksearch_abort();
+    if (this.ksearch_data)
+      this.multi_thread_request_abort(this.ksearch_data.id);
 
     if (this.ksearch_info)
       this.hide_message(this.ksearch_info);
@@ -4524,18 +4672,6 @@
     this.ksearch_data = null;
     this.ksearch_info = null;
     this.ksearch_msg = null;
-  }
-
-  // Aborts pending autocomplete requests
-  this.ksearch_abort = function()
-  {
-    var i, len, ac = this.ksearch_data;
-
-    if (!ac)
-      return;
-
-    for (i=0, len=ac.locks.length; i<len; i++)
-      this.abort_request({request: ac.requests[i], lock: ac.locks[i]});
   };
 
 
@@ -4554,7 +4690,7 @@
     if (this.preview_timer)
       clearTimeout(this.preview_timer);
 
-    var n, id, sid, contact, ref = this, writable = false,
+    var n, id, sid, contact, writable = false,
       source = this.env.source ? this.env.address_sources[this.env.source] : null;
 
     // we don't have dblclick handler here, so use 200 instead of this.dblclick_time
@@ -4971,7 +5107,7 @@
 
   this.init_contact_form = function()
   {
-    var ref = this, col;
+    var col;
 
     if (this.env.coltypes) {
       this.set_photo_actions($('#ff_photo').val());
@@ -5619,25 +5755,25 @@
 
   this.init_subscription_list = function()
   {
-    var p = this, delim = RegExp.escape(this.env.delimiter);
+    var delim = RegExp.escape(this.env.delimiter);
 
     this.last_sub_rx = RegExp('['+delim+']?[^'+delim+']+$');
 
     this.subscription_list = new rcube_list_widget(this.gui_objects.subscriptionlist,
       {multiselect:false, draggable:true, keyboard:false, toggleselect:true});
     this.subscription_list
-      .addEventListener('select', function(o){ p.subscription_select(o); })
-      .addEventListener('dragstart', function(o){ p.drag_active = true; })
-      .addEventListener('dragend', function(o){ p.subscription_move_folder(o); })
+      .addEventListener('select', function(o){ ref.subscription_select(o); })
+      .addEventListener('dragstart', function(o){ ref.drag_active = true; })
+      .addEventListener('dragend', function(o){ ref.subscription_move_folder(o); })
       .addEventListener('initrow', function (row) {
-        row.obj.onmouseover = function() { p.focus_subscription(row.id); };
-        row.obj.onmouseout = function() { p.unfocus_subscription(row.id); };
+        row.obj.onmouseover = function() { ref.focus_subscription(row.id); };
+        row.obj.onmouseout = function() { ref.unfocus_subscription(row.id); };
       })
       .init();
 
     $('#mailboxroot')
-      .mouseover(function(){ p.focus_subscription(this.id); })
-      .mouseout(function(){ p.unfocus_subscription(this.id); })
+      .mouseover(function(){ ref.focus_subscription(this.id); })
+      .mouseout(function(){ ref.unfocus_subscription(this.id); })
   };
 
   this.focus_subscription = function(id)
@@ -6051,9 +6187,6 @@
         init_button(cmd, this.buttons[cmd][i]);
       }
     }
-
-    // set active task button
-    this.set_button(this.task, 'sel');
   };
 
   // set button to a specific state
@@ -6066,7 +6199,7 @@
       button = a_buttons[n];
       obj = document.getElementById(button.id);
 
-      if (!obj)
+      if (!obj || button.status == state)
         continue;
 
       // get default/passive setting of the button
@@ -6092,7 +6225,16 @@
       // disable/enable input buttons
       if (button.type == 'input') {
         button.status = state;
-        obj.disabled = !state;
+        obj.disabled = state == 'pas';
+      }
+      else if (button.type == 'uibutton') {
+        button.status = state;
+        $(obj).button('option', 'disabled', state == 'pas');
+      }
+      else {
+        $(obj)
+          .attr('tabindex', state == 'pas' || state == 'sel' ? '-1' : '0')
+          .attr('aria-disabled', state == 'pas' || state == 'sel' ? 'true' : 'false');
       }
     }
   };
@@ -6178,8 +6320,7 @@
 
     type = type ? type : 'notice';
 
-    var ref = this,
-      key = this.html_identifier(msg),
+    var key = this.html_identifier(msg),
       date = new Date(),
       id = type + date.getTime();
 
@@ -6308,7 +6449,7 @@
   {
     // forward call to parent window
     if (this.is_framed()) {
-      return parent.rcmail.show_popup_dialog(html, title, buttons);
+      return parent.rcmail.show_popup_dialog(html, title, buttons, options);
     }
 
     var popup = $('<div class="popup">')
@@ -6328,7 +6469,7 @@
 
     popup.dialog('option', {
       height: Math.min(h - 40, height + 75 + (buttons ? 50 : 0)),
-      width: Math.min(w - 20, width + 20)
+      width: Math.min(w - 20, width + 36)
     });
 
     return popup;
@@ -6386,18 +6527,18 @@
 
   // for reordering column array (Konqueror workaround)
   // and for setting some message list global variables
-  this.set_message_coltypes = function(coltypes, repl, smart_col)
+  this.set_message_coltypes = function(listcols, repl, smart_col)
   {
     var list = this.message_list,
       thead = list ? list.thead : null,
-      cell, col, n, len, th, tr;
+      repl, cell, col, n, len, tr;
 
-    this.env.coltypes = coltypes;
+    this.env.listcols = listcols;
 
     // replace old column headers
     if (thead) {
       if (repl) {
-        th = document.createElement('thead');
+        thead.innerHTML = '';
         tr = document.createElement('tr');
 
         for (c=0, len=repl.length; c < len; c++) {
@@ -6407,20 +6548,13 @@
           if (repl[c].className) cell.className = repl[c].className;
           tr.appendChild(cell);
         }
-        th.appendChild(tr);
-        thead.parentNode.replaceChild(th, thead);
-        list.thead = thead = th;
+        thead.appendChild(tr);
       }
 
-      for (n=0, len=this.env.coltypes.length; n<len; n++) {
-        col = this.env.coltypes[n];
+      for (n=0, len=this.env.listcols.length; n<len; n++) {
+        col = this.env.listcols[n];
         if ((cell = thead.rows[0].cells[n]) && (col == 'from' || col == 'to' || col == 'fromto')) {
-          cell.id = 'rcm'+col;
-          $('span,a', cell).text(this.get_label(col == 'fromto' ? smart_col : col));
-          // if we have links for sorting, it's a bit more complicated...
-          $('a', cell).click(function(){
-            return rcmail.command('sort', this.id.replace(/^rcm/, ''), this);
-          });
+          $(cell).attr('rel', col).find('span,a').text(this.get_label(col == 'fromto' ? smart_col : col));
         }
       }
     }
@@ -6429,18 +6563,23 @@
     this.env.flagged_col = null;
     this.env.status_col = null;
 
-    if ((n = $.inArray('subject', this.env.coltypes)) >= 0) {
+    if (this.env.coltypes.folder)
+      this.env.coltypes.folder.hidden = !(this.env.search_request || this.env.search_id) || this.env.search_scope == 'base';
+
+    if ((n = $.inArray('subject', this.env.listcols)) >= 0) {
       this.env.subject_col = n;
       if (list)
         list.subject_col = n;
     }
-    if ((n = $.inArray('flag', this.env.coltypes)) >= 0)
+    if ((n = $.inArray('flag', this.env.listcols)) >= 0)
       this.env.flagged_col = n;
-    if ((n = $.inArray('status', this.env.coltypes)) >= 0)
+    if ((n = $.inArray('status', this.env.listcols)) >= 0)
       this.env.status_col = n;
 
-    if (list)
+    if (list) {
+      list.hide_column('folder', (this.env.coltypes.folder && this.env.coltypes.folder.hidden) || $.inArray('folder', this.env.listcols) < 0);
       list.init_header();
+    }
   };
 
   // replace content of row count display
@@ -6569,8 +6708,9 @@
 
     // 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, _mbox: this.env.mailbox},
+        this.display_message(this.get_label('loading'), 'loading')
+      );
     }
   };
 
@@ -6663,14 +6803,22 @@
   this.element_position = function(element, obj)
   {
     var obj = $(obj), win = $(window),
-      width = obj.width(),
-      height = obj.height(),
+      width = obj.outerWidth(),
+      height = obj.outerHeight(),
+      menu_pos = obj.data('menu-pos'),
       win_height = win.height(),
       elem_height = $(element).height(),
       elem_width = $(element).width(),
       pos = obj.offset(),
       top = pos.top,
       left = pos.left + width;
+
+    if (menu_pos == 'bottom') {
+      top += height;
+      left -= width;
+    }
+    else
+      left -= 5;
 
     if (top + elem_height > win_height) {
       top -= elem_height - height;
@@ -6691,15 +6839,14 @@
 
   this.html2plain = function(htmlText, id)
   {
-    var rcmail = this,
-      url = '?_task=utils&_action=html2text',
+    var url = '?_task=utils&_action=html2text',
       lock = this.set_busy(true, 'converting');
 
     this.log('HTTP POST: ' + url);
 
     $.ajax({ type: 'POST', url: url, data: htmlText, contentType: 'application/octet-stream',
-      error: function(o, status, err) { rcmail.http_error(o, status, err, lock); },
-      success: function(data) { rcmail.set_busy(false, null, lock); $('#'+id).val(data); rcmail.log(data); }
+      error: function(o, status, err) { ref.http_error(o, status, err, lock); },
+      success: function(data) { ref.set_busy(false, null, lock); $('#'+id).val(data); ref.log(data); }
     });
   };
 
@@ -6730,13 +6877,13 @@
 
     if (action)
       query._action = action;
-    else
+    else if (this.env.action)
       query._action = this.env.action;
 
     var base = this.env.comm_path, k, param = {};
 
     // overwrite task name
-    if (query._action.match(/([a-z0-9_-]+)\/([a-z0-9-_.]+)/)) {
+    if (action && action.match(/([a-z0-9_-]+)\/([a-z0-9-_.]+)/)) {
       query._action = RegExp.$2;
       base = base.replace(/\_task=[a-z0-9_-]+/, '_task='+RegExp.$1);
     }
@@ -6747,7 +6894,7 @@
         param[k] = query[k];
     }
 
-    return base + '&' + $.param(param) + querystring;
+    return base + (base.indexOf('?') > -1 ? '&' : '?') + $.param(param) + querystring;
   };
 
   this.redirect = function(url, lock)
@@ -6771,7 +6918,7 @@
 
   this.goto_url = function(action, query, lock)
   {
-    this.redirect(this.url(action, query));
+    this.redirect(this.url(action, query), lock);
   };
 
   this.location_href = function(url, target, frame)
@@ -6968,12 +7115,16 @@
         this.env.qsearch = null;
       case 'list':
         if (this.task == 'mail') {
+          var is_multifolder = this.is_multifolder_listing();
           this.enable_command('show', 'select-all', 'select-none', this.env.messagecount > 0);
-          this.enable_command('expunge', this.env.exists);
-          this.enable_command('purge', this.purge_mailbox_test());
-          this.enable_command('expand-all', 'expand-unread', 'collapse-all', this.env.threading && this.env.messagecount);
+          this.enable_command('expunge', this.env.exists && !is_multifolder);
+          this.enable_command('purge', this.purge_mailbox_test() && !is_multifolder);
+          this.enable_command('import-messages', !is_multifolder);
+          this.enable_command('expand-all', 'expand-unread', 'collapse-all', this.env.threading && this.env.messagecount && !is_multifolder);
+          this.enable_command('set-listmode', this.env.threads && !is_multifolder);
 
           if ((response.action == 'list' || response.action == 'search') && this.message_list) {
+            this.message_list.focus();
             this.msglist_select(this.message_list);
             this.triggerEvent('listupdate', { folder:this.env.mailbox, rowcount:this.message_list.rowcount });
           }
@@ -7018,7 +7169,7 @@
     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');
+      this.display_message(this.get_label('connerror'), 'error');
 
     // redirect to url specified in location header if not empty
     var location_url = request.getResponseHeader("Location");
@@ -7059,6 +7210,130 @@
 
     if (this.submit_timer)
       clearTimeout(this.submit_timer);
+  };
+
+  /**
+   Send multi-threaded parallel HTTP requests to the server for a list if items.
+   The string '%' in either a GET query or POST parameters will be replaced with the respective item value.
+   This is the argument object expected: {
+       items: ['foo','bar','gna'],      // list of items to send requests for
+       action: 'task/some-action',      // Roudncube action to call
+       query: { q:'%s' },               // GET query parameters
+       postdata: { source:'%s' },       // POST data (sends a POST request if present)
+       threads: 3,                      // max. number of concurrent requests
+       onresponse: function(data){ },   // Callback function called for every response received from server
+       whendone: function(alldata){ }   // Callback function called when all requests have been sent
+   }
+  */
+  this.multi_thread_http_request = function(prop)
+  {
+    var i, item, reqid = new Date().getTime(),
+      threads = prop.threads || 1;
+
+    prop.reqid = reqid;
+    prop.running = 0;
+    prop.requests = [];
+    prop.result = [];
+    prop._items = $.extend([], prop.items);  // copy items
+
+    if (!prop.lock)
+      prop.lock = this.display_message(this.get_label('loading'), 'loading');
+
+    // add the request arguments to the jobs pool
+    this.http_request_jobs[reqid] = prop;
+
+    // start n threads
+    for (i=0; i < threads; i++) {
+      item = prop._items.shift();
+      if (item === undefined)
+        break;
+
+      prop.running++;
+      prop.requests.push(this.multi_thread_send_request(prop, item));
+    }
+
+    return reqid;
+  };
+
+  // helper method to send an HTTP request with the given iterator value
+  this.multi_thread_send_request = function(prop, item)
+  {
+    var postdata, query;
+
+    // replace %s in post data
+    if (prop.postdata) {
+      postdata = {};
+      for (var k in prop.postdata) {
+        postdata[k] = String(prop.postdata[k]).replace('%s', item);
+      }
+      postdata._reqid = prop.reqid;
+    }
+    // replace %s in query
+    else if (typeof prop.query == 'string') {
+      query = prop.query.replace('%s', item);
+      query += '&_reqid=' + prop.reqid;
+    }
+    else if (typeof prop.query == 'object' && prop.query) {
+      query = {};
+      for (var k in prop.query) {
+        query[k] = String(prop.query[k]).replace('%s', item);
+      }
+      query._reqid = prop.reqid;
+    }
+
+    // send HTTP GET or POST request
+    return postdata ? this.http_post(prop.action, postdata) : this.http_request(prop.action, query);
+  };
+
+  // callback function for multi-threaded http responses
+  this.multi_thread_http_response = function(data, reqid)
+  {
+    var prop = this.http_request_jobs[reqid];
+    if (!prop || prop.running <= 0 || prop.cancelled)
+      return;
+
+    prop.running--;
+
+    // trigger response callback
+    if (prop.onresponse && typeof prop.onresponse == 'function') {
+      prop.onresponse(data);
+    }
+
+    prop.result = $.extend(prop.result, data);
+
+    // send next request if prop.items is not yet empty
+    var item = prop._items.shift();
+    if (item !== undefined) {
+      prop.running++;
+      prop.requests.push(this.multi_thread_send_request(prop, item));
+    }
+    // trigger whendone callback and mark this request as done
+    else if (prop.running == 0) {
+      if (prop.whendone && typeof prop.whendone == 'function') {
+        prop.whendone(prop.result);
+      }
+
+      this.set_busy(false, '', prop.lock);
+
+      // remove from this.http_request_jobs pool
+      delete this.http_request_jobs[reqid];
+    }
+  };
+
+  // abort a running multi-thread request with the given identifier
+  this.multi_thread_request_abort = function(reqid)
+  {
+    var prop = this.http_request_jobs[reqid];
+    if (prop) {
+      for (var i=0; prop.running > 0 && i < prop.requests.length; i++) {
+        if (prop.requests[i].abort)
+          prop.requests[i].abort();
+      }
+
+      prop.running = 0;
+      prop.cancelled = true;
+      this.set_busy(false, '', prop.lock);
+    }
   };
 
   // post the given form to a hidden iframe
@@ -7276,7 +7551,7 @@
     this.env.lastrefresh = new Date();
 
     // plugins should bind to 'requestrefresh' event to add own params
-    this.http_request('refresh', params, lock);
+    this.http_post('refresh', params, lock);
   };
 
   // returns check-recent request parameters
@@ -7337,6 +7612,13 @@
   {
     return this.env.cid ? this.env.cid : (this.contact_list ? this.contact_list.get_single_selection() : null);
   };
+
+  // get the IMP mailbox of the message with the given UID
+  this.get_message_mailbox = function(uid)
+  {
+    var msg = this.env.messages ? this.env.messages[uid] : {};
+    return msg.mbox || this.env.mailbox;
+  }
 
   // gets cursor position
   this.get_caret_pos = function(obj)
@@ -7465,20 +7747,28 @@
     try {
       window.navigator.registerProtocolHandler('mailto', this.mailto_handler_uri(), name);
     }
-    catch(e) {};
+    catch(e) {
+      this.display_message(String(e), 'error');
+    };
   };
 
   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; });
+    if (!nav || (typeof nav.registerProtocolHandler != 'function')) {
+      $(elem).addClass('disabled').click(function(){ return false; });
+    }
+    else {
+      var status = null;
+      if (typeof nav.isProtocolHandlerRegistered == 'function') {
+        status = nav.isProtocolHandlerRegistered('mailto', this.mailto_handler_uri());
+        if (status)
+          $(elem).parent().find('.mailtoprotohandler-status').html(status);
+      }
+      else {
+        $(elem).click(function() { rcmail.register_protocol_handler(name); return false; });
+      }
+    }
   };
 
   // Checks browser capabilities eg. PDF support, TIF support
@@ -7591,7 +7881,6 @@
   // wrapper for localStorage.getItem(key)
   this.local_storage_get_item = function(key, deflt, encrypted)
   {
-
     // TODO: add encryption
     var item = localStorage.getItem(this.get_local_storage_prefix() + key);
     return item !== null ? JSON.parse(item) : (deflt || null);
@@ -7618,12 +7907,12 @@
 {
   if (!elem.title) {
     var $elem = $(elem);
-    if ($elem.width() + indent * 15 > $elem.parent().width())
+    if ($elem.width() + (indent || 0) * 15 > $elem.parent().width())
       elem.title = $elem.text();
   }
 };
 
-rcube_webmail.long_subject_title_ex = function(elem, indent)
+rcube_webmail.long_subject_title_ex = function(elem)
 {
   if (!elem.title) {
     var $elem = $(elem),
@@ -7635,7 +7924,7 @@
       w = tmp.width();
 
     tmp.remove();
-    if (w + indent * 15 > $elem.width())
+    if (w + $('span.branch', $elem).width() * 15 > $elem.width())
       elem.title = txt;
   }
 };

--
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