From d016dcc6f6a3daf8c19e2ececd3c676cd274381a Mon Sep 17 00:00:00 2001
From: Thomas <tb@woodcrest.local>
Date: Wed, 09 Oct 2013 06:02:52 -0400
Subject: [PATCH] Refactor multi-threaded autocomple contact searching to make it available for other purposes, too

---
 program/js/app.js |  751 +++++++++++++++++++++++++++++++++++++++++----------------
 1 files changed, 535 insertions(+), 216 deletions(-)

diff --git a/program/js/app.js b/program/js/app.js
index b982724..43ab7be 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -31,6 +31,7 @@
   this.onloads = [];
   this.messages = {};
   this.group2expand = {};
+  this.http_request_jobs = {};
 
   // webmail client settings
   this.dblclick_time = 500;
@@ -44,7 +45,9 @@
     comm_path: './',
     blankpage: 'program/resources/blank.gif',
     recipients_separator: ',',
-    recipients_delimiter: ', '
+    recipients_delimiter: ', ',
+    popup_width: 1150,
+    popup_width_small: 900
   };
 
   // create protected reference to myself
@@ -189,7 +192,7 @@
 
       case 'mail':
         // enable mail commands
-        this.enable_command('list', 'checkmail', 'add-contact', 'search', 'reset-search', 'collapse-folder', true);
+        this.enable_command('list', 'checkmail', 'add-contact', 'search', 'reset-search', 'collapse-folder', 'import-messages', true);
 
         if (this.gui_objects.messagelist) {
           this.message_list = new rcube_list_widget(this.gui_objects.messagelist, {
@@ -227,7 +230,7 @@
         this.set_button_titles();
 
         this.env.message_commands = ['show', 'reply', 'reply-all', 'reply-list',
-          'moveto', 'copy', 'delete', 'open', 'mark', 'edit', 'viewsource',
+          'move', 'copy', 'delete', 'open', 'mark', 'edit', 'viewsource',
           'print', 'load-attachment', 'download-attachment', 'show-headers', 'hide-headers', 'download',
           'forward', 'forward-inline', 'forward-attachment', 'change-format'];
 
@@ -253,7 +256,8 @@
           }
         }
         else if (this.env.action == 'compose') {
-          this.env.compose_commands = ['send-attachment', 'remove-attachment', 'send', 'cancel', 'toggle-editor', 'list-adresses', 'search', 'reset-search', 'extwin'];
+          this.env.address_group_stack = [];
+          this.env.compose_commands = ['send-attachment', 'remove-attachment', 'send', 'cancel', 'toggle-editor', 'list-adresses', 'pushgroup', 'search', 'reset-search', 'extwin'];
 
           if (this.env.drafts_mailbox)
             this.env.compose_commands.push('savedraft')
@@ -274,12 +278,15 @@
           // init message compose form
           this.init_messageform();
         }
+        else if (this.env.action == 'get')
+          this.enable_command('download', 'print', true);
         // show printing dialog
-        else if (this.env.action == 'print' && this.env.uid)
+        else if (this.env.action == 'print' && this.env.uid) {
           if (bw.safari)
             setTimeout('window.print()', 10);
           else
             window.print();
+        }
 
         // get unread count for each mailbox
         if (this.gui_objects.mailboxlist) {
@@ -320,11 +327,13 @@
         break;
 
       case 'addressbook':
+        this.env.address_group_stack = [];
+
         if (this.gui_objects.folderlist)
           this.env.contactfolders = $.extend($.extend({}, this.env.address_sources), this.env.contactgroups);
 
         this.enable_command('add', 'import', this.env.writable_source);
-        this.enable_command('list', 'listgroup', 'listsearch', 'advanced-search', true);
+        this.enable_command('list', 'listgroup', 'pushgroup', 'popgroup', 'listsearch', 'advanced-search', true);
 
         if (this.gui_objects.contactslist) {
           this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
@@ -368,7 +377,7 @@
         }
 
         if (this.gui_objects.qsearchbox)
-          this.enable_command('search', 'reset-search', 'moveto', true);
+          this.enable_command('search', 'reset-search', true);
 
         break;
 
@@ -390,7 +399,7 @@
         }
         else if (this.env.action == 'edit-folder' && this.gui_objects.editform) {
           this.enable_command('save', 'folder-size', true);
-          parent.rcmail.env.messagecount = this.env.messagecount;
+          parent.rcmail.env.exists = this.env.messagecount;
           parent.rcmail.enable_command('purge', this.env.messagecount);
           $("input[type='text']").first().select();
         }
@@ -596,15 +605,16 @@
 
       case 'extwin':
         if (this.env.action == 'compose') {
-          var form = this.gui_objects.messageform;
+          var form = this.gui_objects.messageform,
+            win = this.open_window('');
 
           $("input[name='_action']", form).val('compose');
           form.action = this.url('mail/compose', { _id: this.env.compose_id, _extwin: 1 });
-          form.target = this.open_window('', 1100, 900);
+          form.target = win.name;
           form.submit();
         }
         else {
-          this.open_window(this.env.permaurl, 900, 900);
+          this.open_window(this.env.permaurl, true);
         }
         break;
 
@@ -786,16 +796,18 @@
 
       // mail task commands
       case 'move':
-      case 'moveto':
+      case 'moveto': // deprecated
         if (this.task == 'mail')
           this.move_messages(props);
         else if (this.task == 'addressbook')
-          this.copy_contact(null, props);
+          this.move_contacts(props);
         break;
 
       case 'copy':
         if (this.task == 'mail')
           this.copy_messages(props);
+        else if (this.task == 'addressbook')
+          this.copy_contacts(props);
         break;
 
       case 'mark':
@@ -857,11 +869,8 @@
 
         // open attachment in frame if it's of a supported mimetype
         if (command != 'download-attachment' && mimetype && this.env.mimetypes && $.inArray(mimetype, this.env.mimetypes) >= 0) {
-          var attachment_win = window.open(this.env.comm_path+'&_action=get&'+qstring+'&_frame=1', this.html_identifier('rcubemailattachment'+this.env.uid+props));
-          if (attachment_win) {
-            setTimeout(function(){ attachment_win.focus(); }, 10);
+          if (this.open_window(this.env.comm_path+'&_action=get&'+qstring+'&_frame=1'))
             break;
-          }
         }
 
         this.goto_url('get', qstring+'&_download=1', false);
@@ -1000,7 +1009,7 @@
         // Reset the auto-save timer
         clearTimeout(this.save_timer);
 
-        this.upload_file(props || this.gui_objects.uploadform);
+        this.upload_file(props || this.gui_objects.uploadform, 'upload');
         break;
 
       case 'insert-sig':
@@ -1044,10 +1053,12 @@
         break;
 
       case 'print':
-        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.env.action == 'get') {
+          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);
           if (this.printwin) {
-            setTimeout(function(){ ref.printwin.focus(); }, 20);
             if (this.env.action != 'show')
               this.mark_message('read', uid);
           }
@@ -1055,15 +1066,15 @@
         break;
 
       case 'viewsource':
-        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)
-            setTimeout(function(){ ref.sourcewin.focus(); }, 20);
-          }
+        if (uid = this.get_single_uid())
+          this.open_window(this.env.comm_path+'&_action=viewsource&_uid='+uid+'&_mbox='+urlencode(this.env.mailbox), true, true);
         break;
 
       case 'download':
-        if (uid = this.get_single_uid())
+        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 });
         break;
 
@@ -1100,9 +1111,29 @@
         }
         break;
 
+      case 'pushgroup':
+        // add group ID to stack
+        this.env.address_group_stack.push(props.id);
+        if (obj && event)
+          rcube_event.cancel(event);
+
       case 'listgroup':
         this.reset_qsearch();
         this.list_contacts(props.source, props.id);
+        break;
+
+      case 'popgroup':
+        if (this.env.address_group_stack.length > 1) {
+          this.env.address_group_stack.pop();
+          this.reset_qsearch();
+          this.list_contacts(props.source, this.env.address_group_stack[this.env.address_group_stack.length-1]);
+        }
+        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');
         break;
 
       case 'import':
@@ -1179,6 +1210,7 @@
       if (typeof cmd === 'string') {
         this.commands[cmd] = enable;
         this.set_button(cmd, (enable ? 'act' : 'pas'));
+        this.triggerEvent('enable-command', {command: cmd, status: enable});
       }
       // push array elements into commands array
       else {
@@ -1321,7 +1353,7 @@
   this.drag_menu = function(e, target)
   {
     var modkey = rcube_event.get_modifier(e),
-      menu = this.gui_objects.message_dragmenu;
+      menu = this.gui_objects.dragmenu;
 
     if (menu && modkey == SHIFT_KEY && this.commands['copy']) {
       var pos = rcube_event.get_mouse_pos(e);
@@ -1335,7 +1367,7 @@
 
   this.drag_menu_action = function(action)
   {
-    var menu = this.gui_objects.message_dragmenu;
+    var menu = this.gui_objects.dragmenu;
     if (menu) {
       $(menu).hide();
     }
@@ -1450,8 +1482,12 @@
       list.draglayer.hide();
       this.drag_end(e);
 
-      if (!this.drag_menu(e, target))
-        this.command('moveto', target);
+      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
@@ -1498,7 +1534,7 @@
       }
     }
     // Multi-message commands
-    this.enable_command('delete', 'moveto', 'copy', 'mark', 'forward', 'forward-attachment', list.selection.length > 0);
+    this.enable_command('delete', 'move', 'copy', 'mark', 'forward', 'forward-attachment', list.selection.length > 0);
 
     // reset all-pages-selection
     if (selected || (list.selection.length && list.selection.length != list.rowcount))
@@ -1506,7 +1542,7 @@
 
     // start timer for message preview (wait for double click)
     if (selected && this.env.contentframe && !list.multi_selecting && !this.dummy_select)
-      this.preview_timer = setTimeout(function(){ ref.msglist_get_preview(); }, 200);
+      this.preview_timer = setTimeout(function() { ref.msglist_get_preview(); }, this.dblclick_time);
     else if (this.env.contentframe)
       this.show_contentframe(false);
   };
@@ -1522,12 +1558,13 @@
 
     var win = this.get_frame_window(this.env.contentframe);
 
-    if (win && win.location.href.indexOf(this.env.blankpage)>=0) {
+    if (win && win.location.href.indexOf(this.env.blankpage) >= 0) {
       if (this.preview_timer)
         clearTimeout(this.preview_timer);
       if (this.preview_read_timer)
         clearTimeout(this.preview_read_timer);
-      this.preview_timer = setTimeout(function(){ ref.msglist_get_preview(); }, 200);
+
+      this.preview_timer = setTimeout(function() { ref.msglist_get_preview(); }, this.dblclick_time);
     }
   };
 
@@ -1535,11 +1572,11 @@
   {
     if (this.preview_timer)
       clearTimeout(this.preview_timer);
-
     if (this.preview_read_timer)
       clearTimeout(this.preview_read_timer);
 
     var uid = list.get_single_selection();
+
     if (uid && this.env.mailbox == this.env.drafts_mailbox)
       this.open_compose_step({ _draft_uid: uid, _mbox: this.env.mailbox });
     else if (uid)
@@ -1600,46 +1637,55 @@
 
   this.check_droptarget = function(id)
   {
-    if (this.task == 'mail')
-      return (this.env.mailboxes[id] && this.env.mailboxes[id].id != this.env.mailbox && !this.env.mailboxes[id].virtual) ? 1 : 0;
+    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;
 
-    if (this.task == 'settings')
-      return id != this.env.mailbox ? 1 : 0;
+      case 'settings':
+        return id != this.env.mailbox ? 1 : 0;
 
-    if (this.task == 'addressbook') {
-      if (id != this.env.source && this.env.contactfolders[id]) {
-        // droptarget is a group - contact add to group action
-        if (this.env.contactfolders[id].type == 'group') {
-          var target_abook = this.env.contactfolders[id].source;
-          if (this.env.contactfolders[id].id != this.env.group && !this.env.contactfolders[target_abook].readonly) {
-            // search result may contain contacts from many sources
-            return (this.env.selection_sources.length > 1 || $.inArray(target_abook, this.env.selection_sources) == -1) ? 2 : 1;
+      case 'addressbook':
+        var target;
+        if (id != this.env.source && (target = this.env.contactfolders[id])) {
+          // droptarget is a group
+          if (target.type == 'group') {
+            if (target.id != this.env.group && !this.env.contactfolders[target.source].readonly) {
+              var is_other = this.env.selection_sources.length > 1 || $.inArray(target.source, this.env.selection_sources) == -1;
+              return !is_other || this.commands.move ? 1 : 2;
+            }
+          }
+          // droptarget is a (writable) addressbook and it's not the source
+          else if (!target.readonly && (this.env.selection_sources.length > 1 || $.inArray(id, this.env.selection_sources) == -1)) {
+            return this.commands.move ? 1 : 2;
           }
         }
-        // droptarget is a (writable) addressbook - contact copy action
-        else if (!this.env.contactfolders[id].readonly) {
-          // search result may contain contacts from many sources
-          return (this.env.selection_sources.length > 1 || $.inArray(id, this.env.selection_sources) == -1) ? 2 : 0;
-        }
-      }
     }
 
     return 0;
   };
 
-  this.open_window = function(url, width, height)
+  // open popup window
+  this.open_window = function(url, small, toolbar)
   {
-    var dh = (window.outerHeight || 0) - (window.innerHeight || 0),
-      dw = (window.outerWidth || 0) - (window.innerWidth || 0),
-      sh = screen.availHeight || screen.height,
-      sw = screen.availWidth || screen.width,
-      w = Math.min(width, sw),
-      h = Math.min(height, sh),
-      l = Math.max(0, (sw - w) / 2 + (screen.left || 0)),
-      t = Math.max(0, (sh - h) / 2 + (screen.top || 0)),
-      wname = 'rcmextwin' + new Date().getTime(),
-      extwin = window.open(url + (url.match(/\?/) ? '&' : '?') + '_extwin=1', wname,
-        'width='+(w-dw)+',height='+(h-dh)+',top='+t+',left='+l+',resizable=yes,toolbar=no,status=no,location=no');
+    var wname = 'rcmextwin' + new Date().getTime();
+
+    url += (url.match(/\?/) ? '&' : '?') + '_extwin=1';
+
+    if (this.env.standard_windows)
+      extwin = window.open(url, wname);
+    else {
+      var win = this.is_framed() ? parent.window : window,
+        page = $(win),
+        page_width = page.width(),
+        page_height = bw.mz ? $('body', win).height() : page.height(),
+        w = Math.min(small ? this.env.popup_width_small : this.env.popup_width, page_width),
+        h = page_height, // always use same height
+        l = (win.screenLeft || win.screenX) + 20,
+        t = (win.screenTop || win.screenY) + 20,
+        extwin = window.open(url, wname,
+          'width='+w+',height='+h+',top='+t+',left='+l+',resizable=yes,location=no,scrollbars=yes'
+          +(toolbar ? ',toolbar=yes,menubar=yes,status=yes' : ',toolbar=no,menubar=no,status=no'));
+    }
 
     // write loading... message to empty windows
     if (!url && extwin.document) {
@@ -1649,7 +1695,7 @@
     // focus window, delayed to bring to front
     window.setTimeout(function() { extwin.focus(); }, 10);
 
-    return wname;
+    return extwin;
   };
 
 
@@ -1686,6 +1732,14 @@
     if (!row.depth && row.has_children && (expando = document.getElementById('rcmexpando'+row.uid))) {
       row.expando = expando;
       expando.onmousedown = function(e) { return self.expand_message_row(e, uid); };
+      if (bw.touch) {
+        expando.addEventListener('touchend', function(e) {
+          if (e.changedTouches.length == 1) {
+            self.expand_message_row(e, uid);
+            return rcube_event.cancel(e);
+          }
+        }, false);
+      }
     }
 
     this.triggerEvent('insertrow', { uid:uid, row:row });
@@ -1731,7 +1785,6 @@
         + (!flags.seen ? ' unread' : '')
         + (flags.deleted ? ' deleted' : '')
         + (flags.flagged ? ' flagged' : '')
-        + (flags.unread_children && flags.seen && !this.env.autoexpand_threads ? ' unroot' : '')
         + (message.selected ? ' selected' : ''),
       row = { cols:[], style:{}, id:'rcmrow'+uid };
 
@@ -1781,6 +1834,9 @@
         expando = '<div id="rcmexpando' + uid + '" class="' + (message.expanded ? 'expanded' : 'collapsed') + '">&nbsp;&nbsp;</div>';
         row_class += ' thread' + (message.expanded? ' expanded' : '');
       }
+
+      if (flags.unread_children && flags.seen && !message.expanded)
+        row_class += ' unroot';
     }
 
     tree += '<span id="msgicn'+uid+'" class="'+css_class+'">&nbsp;</span>';
@@ -1826,7 +1882,7 @@
         html = expando;
       else if (c == 'subject') {
         if (bw.ie) {
-          col.onmouseover = function() { rcube_webmail.long_subject_title_ie(this, message.depth+1); };
+          col.onmouseover = function() { rcube_webmail.long_subject_title_ex(this, message.depth+1); };
           if (bw.ie8)
             tree = '<span></span>' + tree; // #1487821
         }
@@ -1943,7 +1999,7 @@
     }
     else {
       if (!preview && this.env.message_extwin && !this.env.extwin)
-        this.open_window(this.env.comm_path+url, 1000, 1200);
+        this.open_window(this.env.comm_path+url, true);
       else
         this.location_href(this.env.comm_path+url, target, true);
 
@@ -1969,14 +2025,18 @@
 
     if (name && (frame = this.get_frame_element(name))) {
       if (!show && (win = this.get_frame_window(name))) {
-        if (win.location && win.location.href.indexOf(this.env.blankpage)<0)
-          win.location.href = this.env.blankpage;
+        if (win.stop)
+          win.stop();
+        else // IE
+          win.document.execCommand('Stop');
+
+        win.location.href = this.env.blankpage;
       }
       else if (!bw.safari && !bw.konq)
         $(frame)[show ? 'show' : 'hide']();
     }
 
-    if (!show && this.busy)
+    if (!show && this.env.frame_lock)
       this.set_busy(false, null, this.env.frame_lock);
   };
 
@@ -2104,12 +2164,12 @@
 
   this.clear_message_list = function()
   {
-      this.env.messages = {};
-      this.last_selected = 0;
+    this.env.messages = {};
+    this.last_selected = 0;
 
-      this.show_contentframe(false);
-      if (this.message_list)
-        this.message_list.clear(true);
+    this.show_contentframe(false);
+    if (this.message_list)
+      this.message_list.clear(true);
   };
 
   // send remote request to load message list
@@ -2554,7 +2614,7 @@
     // Hide message command buttons until a message is selected
     this.enable_command(this.env.message_commands, false);
 
-    this._with_selected_messages('moveto', post_data, lock);
+    this._with_selected_messages('move', post_data, lock);
   };
 
   // delete selected messages from the current mailbox
@@ -2613,7 +2673,7 @@
     this._with_selected_messages('delete', post_data);
   };
 
-  // Send a specifc moveto/delete request with UIDs of all selected messages
+  // Send a specifc move/delete request with UIDs of all selected messages
   // @private
   this._with_selected_messages = function(action, post_data, lock)
   {
@@ -2655,7 +2715,7 @@
       this.delete_excessive_thread_rows();
 
     if (!lock) {
-      msg = action == 'moveto' ? 'movingmessage' : 'deletingmessage';
+      msg = action == 'move' ? 'movingmessage' : 'deletingmessage';
       lock = this.display_message(this.get_label(msg), 'loading');
     }
 
@@ -2773,10 +2833,10 @@
   {
     var len = a_uids.length,
       i, uid, all_deleted = true,
-      rows = this.message_list ? this.message_list.rows : [];
+      rows = this.message_list ? this.message_list.rows : {};
 
     if (len == 1) {
-      if (!rows.length || (rows[a_uids[0]] && !rows[a_uids[0]].deleted))
+      if (!this.message_list || (rows[a_uids[0]] && !rows[a_uids[0]].deleted))
         this.flag_as_deleted(a_uids);
       else
         this.flag_as_undeleted(a_uids);
@@ -2817,7 +2877,7 @@
     var r_uids = [],
       post_data = this.selection_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 : [],
+      rows = this.message_list ? this.message_list.rows : {},
       count = 0;
 
     for (var i=0, len=a_uids.length; i<len; i++) {
@@ -2837,7 +2897,7 @@
 
     // make sure there are no selected rows
     if (this.env.skip_deleted && this.message_list) {
-      if(!this.env.display_next)
+      if (!this.env.display_next)
         this.message_list.clear_selection();
       if (count < 0)
         post_data._count = (count*-1);
@@ -2861,7 +2921,7 @@
   this.flag_deleted_as_read = function(uids)
   {
     var icn_src, uid, i, len,
-      rows = this.message_list ? this.message_list.rows : [];
+      rows = this.message_list ? this.message_list.rows : {};
 
     uids = String(uids).split(',');
 
@@ -2969,11 +3029,12 @@
 
     // open new compose window
     if (this.env.compose_extwin && !this.env.extwin) {
-      this.open_window(url, 1150, 900);
+      this.open_window(url);
     }
     else {
       this.redirect(url);
-      window.resizeTo(Math.max(1150, $(window).width()), Math.max(900, $(window).height()));
+      if (this.env.extwin)
+        window.resizeTo(Math.max(this.env.popup_width, $(window).width()), $(window).height() + 24);
     }
   };
 
@@ -3015,7 +3076,7 @@
       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' && !this.env.opened_extwin) {
+      if (input_from.prop('type') == 'select-one') {
         this.change_identity(input_from[0]);
       }
     }
@@ -3076,12 +3137,18 @@
 
   this.compose_recipient_select = function(list)
   {
-    this.enable_command('add-recipient', list.selection.length > 0);
+    var id, n, recipients = 0;
+    for (n=0; n < list.selection.length; n++) {
+      id = list.selection[n];
+      if (this.env.contactdata[id])
+        recipients++;
+    }
+    this.enable_command('add-recipient', recipients);
   };
 
   this.compose_add_recipient = function(field)
   {
-    var recipients = [], input = $('#_'+field);
+    var recipients = [], input = $('#_'+field), delim = this.env.recipients_delimiter;
 
     if (this.contact_list && this.contact_list.selection.length) {
       for (var id, n=0; n < this.contact_list.selection.length; n++) {
@@ -3100,8 +3167,10 @@
     }
 
     if (recipients.length && input.length) {
-      var oldval = input.val();
-      input.val((oldval ? oldval + this.env.recipients_delimiter : '') + recipients.join(this.env.recipients_delimiter));
+      var oldval = input.val(), rx = new RegExp(RegExp.escape(delim) + '\\s*$');
+      if (oldval && !rx.test(oldval))
+        oldval += delim + ' ';
+      input.val(oldval + recipients.join(delim + ' ') + delim + ' ');
       this.triggerEvent('add-recipient', { field:field, recipients:recipients });
     }
   };
@@ -3344,12 +3413,57 @@
     if (!show_sig)
       show_sig = this.env.show_sig;
 
-    var cursor_pos, p = -1,
+    // first function execution
+    if (!this.env.identities_initialized) {
+      this.env.identities_initialized = true;
+      if (this.env.show_sig_later)
+        this.env.show_sig = true;
+      if (this.env.opened_extwin)
+        return;
+    }
+
+    var i, rx, cursor_pos, p = -1,
       id = obj.options[obj.selectedIndex].value,
       input_message = $("[name='_message']"),
       message = input_message.val(),
       is_html = ($("input[name='_is_html']").val() == '1'),
-      sig = this.env.identity;
+      sig = this.env.identity,
+      delim = this.env.recipients_separator,
+      rx_delim = RegExp.escape(delim),
+      headers = ['replyto', 'bcc'];
+
+    // update reply-to/bcc fields with addresses defined in identities
+    for (i in headers) {
+      var key = headers[i],
+        old_val = sig && this.env.identities[sig] ? this.env.identities[sig][key] : '',
+        new_val = id && this.env.identities[id] ? this.env.identities[id][key] : '',
+        input = $('[name="_'+key+'"]'), input_val = input.val();
+
+      // remove old address(es)
+      if (old_val && input_val) {
+        rx = new RegExp('\\s*' + RegExp.escape(old_val) + '\\s*');
+        input_val = input_val.replace(rx, '');
+      }
+
+      // cleanup
+      rx = new RegExp(rx_delim + '\\s*' + rx_delim, 'g');
+      input_val = input_val.replace(rx, delim);
+      rx = new RegExp('^[\\s' + rx_delim + ']+');
+      input_val = input_val.replace(rx, '');
+
+      // add new address(es)
+      if (new_val && input_val.indexOf(new_val) == -1 && input_val.indexOf(new_val.replace(/"/g, '')) == -1) {
+        if (input_val) {
+          rx = new RegExp('[' + rx_delim + '\\s]+$')
+          input_val = input_val.replace(rx, '') + delim + ' ';
+        }
+
+        input_val += new_val + delim + ' ';
+      }
+
+      if (old_val || new_val)
+        input.val(input_val).change();
+    }
 
     // enable manual signature insert
     if (this.env.signatures && this.env.signatures[id]) {
@@ -3449,8 +3563,8 @@
     return true;
   };
 
-  // upload attachment file
-  this.upload_file = function(form)
+  // upload (attachment) file
+  this.upload_file = function(form, action)
   {
     if (!form)
       return false;
@@ -3477,7 +3591,7 @@
         return;
       }
 
-      var frame_name = this.async_upload_form(form, 'upload', function(e) {
+      var frame_name = this.async_upload_form(form, action || 'upload', function(e) {
         var d, content = '';
         try {
           if (this.contentDocument) {
@@ -3529,7 +3643,12 @@
       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);
+    var indicator, li = $('<li>');
+
+    li.attr('id', name)
+      .addClass(att.classname)
+      .html(att.html)
+      .on('mouseover', function() { rcube_webmail.long_subject_title_ex(this, 0); });
 
     // replace indicator's li
     if (upload_id && (indicator = document.getElementById(upload_id))) {
@@ -3675,7 +3794,7 @@
     this.env.search_id = null;
   };
 
-  this.sent_successfully = function(type, msg, target)
+  this.sent_successfully = function(type, msg, folders)
   {
     this.display_message(msg, type);
 
@@ -3684,9 +3803,11 @@
       this.lock_form(this.gui_objects.messageform);
       if (rc) {
         rc.display_message(msg, type);
-        // refresh the folder where sent message was saved
-        if (target && rc.env.task == 'mail' && rc.env.action == '' && rc.env.mailbox == target)
-          rc.command('checkmail');
+        // refresh the folder where sent message was saved or replied message comes from
+        if (folders && rc.env.task == 'mail' && rc.env.action == '' && $.inArray(rc.env.mailbox, folders) >= 0) {
+          // @TODO: try with 'checkmail' here when #1485186 is fixed. See also #1489249.
+          rc.command('list');
+        }
       }
       setTimeout(function(){ window.close() }, 1000);
     }
@@ -3843,7 +3964,7 @@
       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);
@@ -3870,34 +3991,26 @@
       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.indexOf(old_value) == 0 && (!ac || ac.num <= 0) && this.env.contacts && !this.env.contacts.length)
+    if (old_value && old_value.length && q.indexOf(old_value) == 0 && (!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;
@@ -3909,7 +4022,6 @@
     // display search results
     var i, len, ul, li, text, 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
@@ -3963,27 +4075,8 @@
     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)
@@ -4018,7 +4111,8 @@
   // 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);
@@ -4029,18 +4123,6 @@
     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]});
   };
 
 
@@ -4059,43 +4141,55 @@
     if (this.preview_timer)
       clearTimeout(this.preview_timer);
 
-    var n, id, sid, ref = this, writable = false,
+    var n, id, sid, contact, ref = this, 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
     if (id = list.get_single_selection())
       this.preview_timer = setTimeout(function(){ ref.load_contact(id, 'show'); }, 200);
     else if (this.env.contentframe)
       this.show_contentframe(false);
 
     if (list.selection.length) {
+      list.draggable = false;
+
       // no source = search result, we'll need to detect if any of
       // selected contacts are in writable addressbook to enable edit/delete
       // we'll also need to know sources used in selection for copy
       // and group-addmember operations (drag&drop)
       this.env.selection_sources = [];
-      if (!source) {
-        for (n in list.selection) {
+
+      if (source) {
+        this.env.selection_sources.push(this.env.source);
+      }
+
+      for (n in list.selection) {
+        contact = list.data[list.selection[n]];
+        if (!source) {
           sid = String(list.selection[n]).replace(/^[^-]+-/, '');
           if (sid && this.env.address_sources[sid]) {
-            writable = writable || !this.env.address_sources[sid].readonly;
+            writable = writable || (!this.env.address_sources[sid].readonly && !contact.readonly);
             this.env.selection_sources.push(sid);
           }
         }
-        this.env.selection_sources = $.unique(this.env.selection_sources);
+        else {
+          writable = writable || (!source.readonly && !contact.readonly);
+        }
+
+        if (contact._type != 'group')
+          list.draggable = true;
       }
-      else {
-        this.env.selection_sources.push(this.env.source);
-        writable = !source.readonly;
-      }
+
+      this.env.selection_sources = $.unique(this.env.selection_sources);
     }
 
     // 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', this.env.group && list.selection.length > 0);
+    this.enable_command('group-remove-selected', this.env.group && list.selection.length > 0 && writable);
     this.enable_command('compose', this.env.group || list.selection.length > 0);
-    this.enable_command('export-selected', list.selection.length > 0);
+    this.enable_command('export-selected', 'copy', list.selection.length > 0);
     this.enable_command('edit', id && writable);
-    this.enable_command('delete', list.selection.length && writable);
+    this.enable_command('delete', 'move', list.selection.length > 0 && writable);
 
     return false;
   };
@@ -4123,10 +4217,28 @@
     else if (!this.env.search_request)
       folder = group ? 'G'+src+group : src;
 
-    this.select_folder(folder, '', true);
-
     this.env.source = src;
     this.env.group = group;
+
+    // truncate groups listing stack
+    var index = $.inArray(this.env.group, this.env.address_group_stack);
+    if (index < 0)
+      this.env.address_group_stack = [];
+    else
+      this.env.address_group_stack = this.env.address_group_stack.slice(0,index);
+
+    // make sure the current group is on top of the stack
+    if (this.env.group) {
+      this.env.address_group_stack.push(this.env.group);
+
+      // mark the first group on the stack as selected in the directory list
+      folder = 'G'+src+this.env.address_group_stack[0];
+    }
+    else if (this.gui_objects.addresslist_title) {
+        $(this.gui_objects.addresslist_title).html(this.get_label('contacts'));
+    }
+
+    this.select_folder(folder, '', true);
 
     // load contacts remotely
     if (this.gui_objects.contactslist) {
@@ -4182,16 +4294,38 @@
 
   this.list_contacts_clear = function()
   {
+    this.contact_list.data = {};
     this.contact_list.clear(true);
     this.show_contentframe(false);
-    this.enable_command('delete', false);
+    this.enable_command('delete', 'move', 'copy', false);
     this.enable_command('compose', this.env.group ? true : false);
+  };
+
+  this.set_group_prop = function(prop)
+  {
+    if (this.gui_objects.addresslist_title) {
+      var boxtitle = $(this.gui_objects.addresslist_title).html('');  // clear contents
+
+      // add link to pop back to parent group
+      if (this.env.address_group_stack.length > 1) {
+        $('<a href="#list">...</a>')
+          .addClass('poplink')
+          .appendTo(boxtitle)
+          .click(function(e){ return ref.command('popgroup','',this); });
+        boxtitle.append('&nbsp;&raquo;&nbsp;');
+      }
+
+      boxtitle.append($('<span>').text(prop.name));
+    }
+
+    this.triggerEvent('groupupdate', prop);
   };
 
   // load contact record
   this.load_contact = function(cid, action, framed)
   {
-    var win, url = {}, target = window;
+    var win, url = {}, target = window,
+      rec = this.contact_list ? this.contact_list.data[cid] : null;
 
     if (win = this.get_frame_window(this.env.contentframe)) {
       url._framed = 1;
@@ -4201,7 +4335,9 @@
       // load dummy content, unselect selected row(s)
       if (!cid)
         this.contact_list.clear_selection();
-      this.enable_command('delete', 'compose', 'export-selected', cid);
+
+      this.enable_command('compose', rec && rec.email);
+      this.enable_command('export-selected', rec && rec._type != 'group');
     }
     else if (framed)
       return false;
@@ -4231,14 +4367,38 @@
     this.http_post('group-'+what+'members', post_data, lock);
   };
 
-  // copy a contact to the specified target (group or directory)
-  this.copy_contact = function(cid, to)
+  this.contacts_drag_menu = function(e, to)
+  {
+    var dest = to.type == 'group' ? to.source : to.id,
+      source = this.env.source;
+
+    if (!this.env.address_sources[dest] || this.env.address_sources[dest].readonly)
+      return true;
+
+    // search result may contain contacts from many sources, but if there is only one...
+    if (source == '' && this.env.selection_sources.length == 1)
+      source = this.env.selection_sources[0];
+
+    if (to.type == 'group' && dest == source) {
+      var cid = this.contact_list.get_selection().join(',');
+      this.group_member_change('add', cid, dest, to.id);
+      return true;
+    }
+    // move action is not possible, "redirect" to copy if menu wasn't requested
+    else if (!this.commands.move && rcube_event.get_modifier(e) != SHIFT_KEY) {
+      this.copy_contacts(to);
+      return true;
+    }
+
+    return this.drag_menu(e, to);
+  };
+
+  // copy contact(s) to the specified target (group or directory)
+  this.copy_contacts = function(to)
   {
     var n, dest = to.type == 'group' ? to.source : to.id,
       source = this.env.source,
-      group = this.env.group ? this.env.group : '';
-
-    if (!cid)
+      group = this.env.group ? this.env.group : '',
       cid = this.contact_list.get_selection().join(',');
 
     if (!cid || !this.env.address_sources[dest] || this.env.address_sources[dest].readonly)
@@ -4251,13 +4411,12 @@
     // tagret is a group
     if (to.type == 'group') {
       if (dest == source)
-        this.group_member_change('add', cid, dest, to.id);
-      else {
-        var lock = this.display_message(this.get_label('copyingcontact'), 'loading'),
-          post_data = {_cid: cid, _source: this.env.source, _to: dest, _togid: to.id, _gid: group};
+        return;
 
-        this.http_post('copy', post_data, lock);
-      }
+      var lock = this.display_message(this.get_label('copyingcontact'), 'loading'),
+        post_data = {_cid: cid, _source: this.env.source, _to: dest, _togid: to.id, _gid: group};
+
+      this.http_post('copy', post_data, lock);
     }
     // target is an addressbook
     else if (to.id != source) {
@@ -4268,19 +4427,53 @@
     }
   };
 
-  this.delete_contacts = function()
+  // move contact(s) to the specified target (group or directory)
+  this.move_contacts = function(to)
   {
-    var selection = this.contact_list.get_selection(),
-      undelete = this.env.source && this.env.address_sources[this.env.source].undelete;
+    var dest = to.type == 'group' ? to.source : to.id,
+      source = this.env.source,
+      group = this.env.group ? this.env.group : '';
 
-    // exit if no mailbox specified or if selection is empty
-    if (!(selection.length || this.env.cid) || (!undelete && !confirm(this.get_label('deletecontactconfirm'))))
+    if (!this.env.address_sources[dest] || this.env.address_sources[dest].readonly)
       return;
 
-    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');
+    // search result may contain contacts from many sources, but if there is only one...
+    if (source == '' && this.env.selection_sources.length == 1)
+      source = this.env.selection_sources[0];
 
+    if (to.type == 'group') {
+      if (dest == source)
+        return;
+
+      this._with_selected_contacts('move', {_to: dest, _togid: to.id});
+    }
+    // target is an addressbook
+    else if (to.id != source)
+      this._with_selected_contacts('move', {_to: to.id});
+  };
+
+  // delete contact(s)
+  this.delete_contacts = function()
+  {
+    var undelete = this.env.source && this.env.address_sources[this.env.source].undelete;
+
+    if (!undelete && !confirm(this.get_label('deletecontactconfirm')))
+      return;
+
+    return this._with_selected_contacts('delete');
+  };
+
+  this._with_selected_contacts = function(action, post_data)
+  {
+    var selection = this.contact_list ? this.contact_list.get_selection() : [];
+
+    // exit if no mailbox specified or if selection is empty
+    if (!selection.length && !this.env.cid)
+      return;
+
+    var n, a_cids = [],
+      label = action == 'delete' ? 'contactdeleting' : 'movingcontact',
+      lock = this.display_message(this.get_label(label), 'loading');
     if (this.env.cid)
       a_cids.push(this.env.cid);
     else {
@@ -4295,6 +4488,11 @@
         this.show_contentframe(false);
     }
 
+    if (!post_data)
+      post_data = {};
+
+    post_data._source = this.env.source;
+    post_data._from = this.env.action;
     post_data._cid = a_cids.join(',');
 
     if (this.env.group)
@@ -4305,13 +4503,13 @@
       post_data._search = this.env.search_request;
 
     // send request to server
-    this.http_post('delete', post_data, lock)
+    this.http_post(action, post_data, lock)
 
     return true;
   };
 
   // update a contact record in the list
-  this.update_contact_row = function(cid, cols_arr, newcid, source)
+  this.update_contact_row = function(cid, cols_arr, newcid, source, data)
   {
     var c, row, list = this.contact_list;
 
@@ -4325,10 +4523,11 @@
     }
 
     list.update_row(cid, cols_arr, newcid, true);
+    list.data[cid] = data;
   };
 
   // add row to contacts list
-  this.add_contact_row = function(cid, cols, classes)
+  this.add_contact_row = function(cid, cols, classes, data)
   {
     if (!this.gui_objects.contactslist)
       return false;
@@ -4350,6 +4549,8 @@
       row.cols.push(col);
     }
 
+    // store data in list member
+    list.data[cid] = data;
     list.insert_row(row);
 
     this.enable_command('export', list.rowcount > 0);
@@ -4776,7 +4977,7 @@
   this.replace_contact_photo = function(id)
   {
     var img_src = id == '-del-' ? this.env.photo_placeholder :
-      this.env.comm_path + '&_action=photo&_source=' + this.env.source + '&_cid=' + this.env.cid + '&_photo=' + id;
+      this.env.comm_path + '&_action=photo&_source=' + this.env.source + '&_cid=' + (this.env.cid || 0) + '&_photo=' + id;
 
     this.set_photo_actions(id);
     $(this.gui_objects.contactphoto).children('img').attr('src', img_src);
@@ -5760,14 +5961,14 @@
 
         for (c=0, len=repl.length; c < len; c++) {
           cell = document.createElement('td');
-          cell.innerHTML = repl[c].html;
+          cell.innerHTML = repl[c].html || '';
           if (repl[c].id) cell.id = repl[c].id;
           if (repl[c].className) cell.className = repl[c].className;
           tr.appendChild(cell);
         }
         th.appendChild(tr);
         thead.parentNode.replaceChild(th, thead);
-        thead = th;
+        list.thead = thead = th;
       }
 
       for (n=0, len=this.env.coltypes.length; n<len; n++) {
@@ -6177,7 +6378,7 @@
           this.enable_command('export-selected', false);
         }
 
-      case 'moveto':
+      case 'move':
         if (this.env.action == 'show') {
           // re-enable commands on move/delete error
           this.enable_command(this.env.message_commands, true);
@@ -6218,6 +6419,7 @@
 
           if ((response.action == 'list' || response.action == 'search') && this.message_list) {
             this.msglist_select(this.message_list);
+            this.message_list.resize();
             this.triggerEvent('listupdate', { folder:this.env.mailbox, rowcount:this.message_list.rowcount });
           }
         }
@@ -6228,6 +6430,7 @@
             this.enable_command('search-create', this.env.source == '');
             this.enable_command('search-delete', this.env.search_id);
             this.update_group_commands();
+            this.contact_list.resize();
             this.triggerEvent('listupdate', { folder:this.env.source, rowcount:this.contact_list.rowcount });
           }
         }
@@ -6288,6 +6491,130 @@
 
     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 reqid = new Date().getTime();
+
+    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
+    var item, threads = prop.threads || 1;
+    for (var 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
@@ -6389,9 +6716,10 @@
         url: ref.url(ref.env.filedrop.action||'upload', { _id:ref.env.compose_id||ref.env.cid||'', _uploadid:ts, _remote:1 }),
         contentType: formdata ? false : 'multipart/form-data; boundary=' + boundary,
         processData: false,
+        timeout: 0, // disable default timeout set in ajaxSetup()
         data: formdata || multipart,
         headers: {'X-Roundcube-Request': ref.env.request_token},
-        beforeSend: function(xhr, s) { if (!formdata && xhr.sendAsBinary) xhr.send = xhr.sendAsBinary; },
+        xhr: function() { var xhr = jQuery.ajaxSettings.xhr(); if (!formdata && xhr.sendAsBinary) xhr.send = xhr.sendAsBinary; return xhr; },
         success: function(data){ ref.http_response(data); },
         error: function(o, status, err) { ref.http_error(o, status, err, null, 'attachment'); }
       });
@@ -6431,7 +6759,7 @@
             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 += reader.result + crlf;
             multipart += dashdash + boundary + crlf;
 
             if (j == last)  // we're done, submit the data
@@ -6716,15 +7044,6 @@
         return 1;
     }
 
-    // this will detect any pdf plugin including PDF.js in Firefox
-    var obj = document.createElement('OBJECT');
-    obj.onload = function() { rcmail.env.browser_capabilities.pdf = 1; };
-    obj.onerror = function() { rcmail.env.browser_capabilities.pdf = 0; };
-    obj.style.display = 'none';
-    obj.type = 'application/pdf';
-    obj.data = 'program/resources/blank.pdf';
-    document.body.appendChild(obj);
-
     return 0;
   };
 
@@ -6761,11 +7080,11 @@
   if (!elem.title) {
     var $elem = $(elem);
     if ($elem.width() + indent * 15 > $elem.parent().width())
-      elem.title = $elem.html();
+      elem.title = $elem.text();
   }
 };
 
-rcube_webmail.long_subject_title_ie = function(elem, indent)
+rcube_webmail.long_subject_title_ex = function(elem, indent)
 {
   if (!elem.title) {
     var $elem = $(elem),

--
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