From 037af6890fe6fdb84a08d3c86083e847c90ec0ad Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Tue, 22 Oct 2013 08:17:26 -0400
Subject: [PATCH] Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)

---
 program/js/app.js |  583 ++++++++++++++++++++++++++++++++++-----------------------
 1 files changed, 347 insertions(+), 236 deletions(-)

diff --git a/program/js/app.js b/program/js/app.js
index a0cf5f8..77ec9d9 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -3,8 +3,8 @@
  | Roundcube Webmail Client Script                                       |
  |                                                                       |
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
- | Copyright (C) 2011, Kolab Systems AG                                  |
+ | 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.                |
@@ -219,7 +219,7 @@
         if (this.gui_objects.qsearchbox) {
           if (this.env.search_text != null)
             this.gui_objects.qsearchbox.value = this.env.search_text;
-          $(this.gui_objects.qsearchbox).focusin(function() { rcmail.message_list.blur(); });
+          $(this.gui_objects.qsearchbox).focusin(function() { rcmail.message_list && rcmail.message_list.blur(); });
         }
 
         this.set_button_titles();
@@ -251,7 +251,8 @@
           }
         }
         else if (this.env.action == 'compose') {
-          this.env.compose_commands = ['send-attachment', 'remove-attachment', 'send', 'cancel', 'toggle-editor', 'list-adresses', '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')
@@ -312,17 +313,19 @@
         }
 
         // detect browser capabilities
-        if (!this.is_framed())
+        if (!this.is_framed() && !this.env.extwin)
           this.browser_capabilities_check();
 
         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,
@@ -361,7 +364,7 @@
 
         if (this.gui_objects.editform) {
           this.enable_command('save', true);
-          if (this.env.action == 'add' || this.env.action == 'edit')
+          if (this.env.action == 'add' || this.env.action == 'edit' || this.env.action == 'search')
               this.init_contact_form();
         }
 
@@ -388,7 +391,7 @@
         }
         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();
         }
@@ -441,10 +444,11 @@
 
         this.enable_command('login', true);
         break;
+    }
 
-      default:
-        break;
-      }
+    // unset contentframe variable if preview_pane is enabled
+    if (this.env.contentframe && !$('#' + this.env.contentframe).is(':visible'))
+      this.env.contentframe = null;
 
     // prevent from form submit with Enter key in file input fields
     if (bw.ie)
@@ -458,8 +462,21 @@
       this.display_message(this.pending_message[0], this.pending_message[1], this.pending_message[2]);
 
     // map implicit containers
-    if (this.gui_objects.folderlist)
+    if (this.gui_objects.folderlist) {
       this.gui_containers.foldertray = $(this.gui_objects.folderlist);
+
+      // init treelist widget
+      if (window.rcube_treelist_widget) {
+        this.treelist = new rcube_treelist_widget(this.gui_objects.folderlist, {
+          id_prefix: 'rcmli',
+          id_encode: this.html_identifier_encode,
+          id_decode: this.html_identifier_decode,
+          check_droptarget: function(node){ return !node.virtual && ref.check_droptarget(node.id) }
+        });
+        this.treelist.addEventListener('collapse', function(node){ ref.folder_collapsed(node) });
+        this.treelist.addEventListener('expand', function(node){ ref.folder_collapsed(node) });
+      }
+    }
 
     // activate html5 file drop feature (if browser supports it and if configured)
     if (this.gui_objects.filedrop && this.env.filedrop && ((window.XMLHttpRequest && XMLHttpRequest.prototype && XMLHttpRequest.prototype.sendAsBinary) || window.FormData)) {
@@ -508,7 +525,7 @@
       return false;
 
     // let the browser handle this click (shift/ctrl usually opens the link in a new window/tab)
-    if ((obj && obj.href && String(obj.href).indexOf(location.href) < 0) && rcube_event.get_modifier(event)) {
+    if ((obj && obj.href && String(obj.href).indexOf('#') < 0) && rcube_event.get_modifier(event)) {
       return true;
     }
 
@@ -582,11 +599,11 @@
           var prevstate = this.env.compose_extwin;
           $("input[name='_action']", this.gui_objects.messageform).val('compose');
           this.gui_objects.messageform.action = this.url('mail/compose', { _id: this.env.compose_id, _extwin: 1 });
-          this.gui_objects.messageform.target = this.open_window('', 1150, 900);
+          this.gui_objects.messageform.target = this.open_window('', 1100);
           this.gui_objects.messageform.submit();
         }
         else {
-          this.open_window(this.env.permaurl, 1000, 1200);
+          this.open_window(this.env.permaurl, 900);
         }
         break;
 
@@ -755,7 +772,7 @@
       case 'moveto':
         if (this.task == 'mail')
           this.move_messages(props);
-        else if (this.task == 'addressbook' && this.drag_active)
+        else if (this.task == 'addressbook')
           this.copy_contact(null, props);
         break;
 
@@ -819,12 +836,10 @@
         var qstring = '_mbox='+urlencode(this.env.mailbox)+'&_uid='+this.env.uid+'&_part='+props.part;
 
         // open attachment in frame if it's of a supported mimetype
-        if (this.env.uid && props.mimetype && this.env.mimetypes && $.inArray(props.mimetype, $.map(this.env.mimetypes, function(v,k){ return v })) >= 0) {
-          if (props.mimetype == 'text/html')
-            qstring += '&_safe=1';
-          this.attachment_win = window.open(this.env.comm_path+'&_action=get&'+qstring+'&_frame=1', 'rcubemailattachment');
-          if (this.attachment_win) {
-            setTimeout(function(){ ref.attachment_win.focus(); }, 10);
+        if (this.env.uid && props.mimetype && this.env.mimetypes && $.inArray(props.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.part));
+          if (attachment_win) {
+            setTimeout(function(){ attachment_win.focus(); }, 10);
             break;
           }
         }
@@ -945,8 +960,8 @@
         // Reset the auto-save timer
         clearTimeout(this.save_timer);
 
-        // compose form did not change
-        if (this.cmp_hash == this.compose_field_hash()) {
+        // compose form did not change (and draft wasn't saved already)
+        if (this.env.draft_id && this.cmp_hash == this.compose_field_hash()) {
           this.auto_save_start();
           break;
         }
@@ -990,7 +1005,7 @@
         if (uid = this.get_single_uid()) {
           url = {_reply_uid: uid, _mbox: this.env.mailbox};
           if (command == 'reply-all')
-            // do reply-list, when list is detected and popup menu wasn't used 
+            // do reply-list, when list is detected and popup menu wasn't used
             url._all = (!props && this.commands['reply-list'] ? 'list' : 'all');
           else if (command == 'reply-list')
             url._all = 'list';
@@ -1051,8 +1066,13 @@
         this.reset_qsearch();
         this.select_all_mode = false;
 
-        if (s && this.env.mailbox)
+        if (s && this.env.action == 'compose') {
+          if (this.contact_list)
+            this.list_contacts_clear();
+        }
+        else if (s && this.env.mailbox) {
           this.list_mailbox(this.env.mailbox, 1);
+        }
         else if (s && this.task == 'addressbook') {
           if (this.env.source == '') {
             for (n in this.env.address_sources) break;
@@ -1063,9 +1083,23 @@
         }
         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':
@@ -1253,11 +1287,12 @@
 
   this.html_identifier = function(str, encode)
   {
-    str = String(str);
-    if (encode)
-      return Base64.encode(str).replace(/=+$/, '').replace(/\+/g, '-').replace(/\//g, '_');
-    else
-      return str.replace(this.identifier_expr, '_');
+    return encode ? this.html_identifier_encode(str) : String(str).replace(this.identifier_expr, '_');
+  };
+
+  this.html_identifier_encode = function(str)
+  {
+    return Base64.encode(String(str)).replace(/=+$/, '').replace(/\+/g, '-').replace(/\//g, '_');
   };
 
   this.html_identifier_decode = function(str)
@@ -1310,29 +1345,9 @@
     if (this.preview_read_timer)
       clearTimeout(this.preview_read_timer);
 
-    // save folderlist and folders location/sizes for droptarget calculation in drag_move()
-    if (this.gui_objects.folderlist && model) {
-      this.initialBodyScrollTop = bw.ie ? 0 : window.pageYOffset;
-      this.initialListScrollTop = this.gui_objects.folderlist.parentNode.scrollTop;
-
-      var k, li, height,
-        list = $(this.gui_objects.folderlist);
-        pos = list.offset();
-
-      this.env.folderlist_coords = { x1:pos.left, y1:pos.top, x2:pos.left + list.width(), y2:pos.top + list.height() };
-
-      this.env.folder_coords = [];
-      for (k in model) {
-        if (li = this.get_folder_li(k)) {
-          // only visible folders
-          if (height = li.firstChild.offsetHeight) {
-            pos = $(li.firstChild).offset();
-            this.env.folder_coords[k] = { x1:pos.left, y1:pos.top,
-              x2:pos.left + li.firstChild.offsetWidth, y2:pos.top + height, on:0 };
-          }
-        }
-      }
-    }
+    // prepare treelist widget for dragging interactions
+    if (this.treelist)
+      this.treelist.drag_start();
   };
 
   this.drag_end = function(e)
@@ -1340,87 +1355,28 @@
     this.drag_active = false;
     this.env.last_folder_target = null;
 
-    if (this.folder_auto_timer) {
-      clearTimeout(this.folder_auto_timer);
-      this.folder_auto_timer = null;
-      this.folder_auto_expand = null;
-    }
-
-    // over the folders
-    if (this.gui_objects.folderlist && this.env.folder_coords) {
-      for (var k in this.env.folder_coords) {
-        if (this.env.folder_coords[k].on)
-          $(this.get_folder_li(k)).removeClass('droptarget');
-      }
-    }
+    if (this.treelist)
+      this.treelist.drag_end();
   };
 
   this.drag_move = function(e)
   {
-    if (this.gui_objects.folderlist && this.env.folder_coords) {
-      var k, li, div, check, oldclass,
+    if (this.gui_objects.folderlist) {
+      var drag_target, oldclass,
         layerclass = 'draglayernormal',
-        mouse = rcube_event.get_mouse_pos(e),
-        pos = this.env.folderlist_coords,
-        // offsets to compensate for scrolling while dragging a message
-        boffset = bw.ie ? -document.documentElement.scrollTop : this.initialBodyScrollTop,
-        moffset = this.initialListScrollTop-this.gui_objects.folderlist.parentNode.scrollTop;
+        mouse = rcube_event.get_mouse_pos(e);
 
       if (this.contact_list && this.contact_list.draglayer)
         oldclass = this.contact_list.draglayer.attr('class');
 
-      mouse.y += -moffset-boffset;
-
-      // if mouse pointer is outside of folderlist
-      if (mouse.x < pos.x1 || mouse.x >= pos.x2 || mouse.y < pos.y1 || mouse.y >= pos.y2) {
-        if (this.env.last_folder_target) {
-          $(this.get_folder_li(this.env.last_folder_target)).removeClass('droptarget');
-          this.env.folder_coords[this.env.last_folder_target].on = 0;
-          this.env.last_folder_target = null;
-        }
-        if (layerclass != oldclass && this.contact_list && this.contact_list.draglayer)
-          this.contact_list.draglayer.attr('class', layerclass);
-        return;
+      // mouse intersects a valid drop target on the treelist
+      if (this.treelist && (drag_target = this.treelist.intersects(mouse, true))) {
+        this.env.last_folder_target = drag_target;
+        layerclass = 'draglayer' + (this.check_droptarget(drag_target) > 1 ? 'copy' : 'normal');
       }
-
-      // over the folders
-      for (k in this.env.folder_coords) {
-        pos = this.env.folder_coords[k];
-        if (mouse.x >= pos.x1 && mouse.x < pos.x2 && mouse.y >= pos.y1 && mouse.y < pos.y2) {
-          if (check = this.check_droptarget(k)) {
-            li = this.get_folder_li(k);
-            div = $(li.getElementsByTagName('div')[0]);
-
-            // if the folder is collapsed, expand it after 1sec and restart the drag & drop process.
-            if (div.hasClass('collapsed')) {
-              if (this.folder_auto_timer)
-                clearTimeout(this.folder_auto_timer);
-
-              this.folder_auto_expand = this.env.mailboxes[k].id;
-              this.folder_auto_timer = setTimeout(function() {
-                rcmail.command('collapse-folder', rcmail.folder_auto_expand);
-                rcmail.drag_start(null);
-              }, 1000);
-            }
-            else if (this.folder_auto_timer) {
-              clearTimeout(this.folder_auto_timer);
-              this.folder_auto_timer = null;
-              this.folder_auto_expand = null;
-            }
-
-            $(li).addClass('droptarget');
-            this.env.folder_coords[k].on = 1;
-            this.env.last_folder_target = k;
-            layerclass = 'draglayer' + (check > 1 ? 'copy' : 'normal');
-          }
-          // Clear target, otherwise drag end will trigger move into last valid droptarget
-          else
-            this.env.last_folder_target = null;
-        }
-        else if (pos.on) {
-          $(this.get_folder_li(k)).removeClass('droptarget');
-          this.env.folder_coords[k].on = 0;
-        }
+      else {
+        // Clear target, otherwise drag end will trigger move into last valid droptarget
+        this.env.last_folder_target = null;
       }
 
       if (layerclass != oldclass && this.contact_list && this.contact_list.draglayer)
@@ -1430,40 +1386,33 @@
 
   this.collapse_folder = function(name)
   {
-    var li = this.get_folder_li(name, '', true),
-      div = $('div:first', li),
-      ul = $('ul:first', li);
+    if (this.treelist)
+      this.treelist.toggle(name);
+  };
 
-    if (div.hasClass('collapsed')) {
-      ul.show();
-      div.removeClass('collapsed').addClass('expanded');
-      var reg = new RegExp('&'+urlencode(name)+'&');
-      this.env.collapsed_folders = this.env.collapsed_folders.replace(reg, '');
-    }
-    else if (div.hasClass('expanded')) {
-      ul.hide();
-      div.removeClass('expanded').addClass('collapsed');
-      this.env.collapsed_folders = this.env.collapsed_folders+'&'+urlencode(name)+'&';
+  this.folder_collapsed = function(node)
+  {
+    var prefname = this.env.task == 'addressbook' ? 'collapsed_abooks' : 'collapsed_folders';
+
+    if (node.collapsed) {
+      this.env[prefname] = this.env[prefname] + '&'+urlencode(node.id)+'&';
 
       // select the folder if one of its childs is currently selected
       // don't select if it's virtual (#1488346)
-      if (this.env.mailbox.indexOf(name + this.env.delimiter) == 0 && !$(li).hasClass('virtual'))
+      if (this.env.mailbox && this.env.mailbox.indexOf(name + this.env.delimiter) == 0 && !node.virtual)
         this.command('list', name);
     }
-    else
-      return;
-
-    // Work around a bug in IE6 and IE7, see #1485309
-    if (bw.ie6 || bw.ie7) {
-      var siblings = li.nextSibling ? li.nextSibling.getElementsByTagName('ul') : null;
-      if (siblings && siblings.length && (li = siblings[0]) && li.style && li.style.display != 'none') {
-        li.style.display = 'none';
-        li.style.display = '';
-      }
+    else {
+      var reg = new RegExp('&'+urlencode(node.id)+'&');
+      this.env[prefname] = this.env[prefname].replace(reg, '');
     }
 
-    this.command('save-pref', { name: 'collapsed_folders', value: this.env.collapsed_folders });
-    this.set_unread_count_display(name, false);
+    if (!this.drag_active) {
+      this.command('save-pref', { name: prefname, value: this.env[prefname] });
+
+      if (this.env.unread_counts)
+        this.set_unread_count_display(node.id, false);
+    }
   };
 
   this.doc_mouse_up = function(e)
@@ -1488,9 +1437,9 @@
     if (this.drag_active && model && this.env.last_folder_target) {
       var target = model[this.env.last_folder_target];
 
-      $(this.get_folder_li(this.env.last_folder_target)).removeClass('droptarget');
       this.env.last_folder_target = null;
       list.draglayer.hide();
+      this.drag_end(e);
 
       if (!this.drag_menu(e, target))
         this.command('moveto', target);
@@ -1525,16 +1474,16 @@
     if (this.preview_read_timer)
       clearTimeout(this.preview_read_timer);
 
-    var selected = list.get_single_selection() != null;
+    var selected = list.get_single_selection();
 
-    this.enable_command(this.env.message_commands, selected);
+    this.enable_command(this.env.message_commands, selected != null);
     if (selected) {
       // Hide certain command buttons when Drafts folder is selected
       if (this.env.mailbox == this.env.drafts_mailbox)
         this.enable_command('reply', 'reply-all', 'reply-list', 'forward', 'forward-attachment', 'forward-inline', false);
       // Disable reply-list when List-Post header is not set
       else {
-        var msg = this.env.messages[list.get_single_selection()];
+        var msg = this.env.messages[selected];
         if (!msg.ml)
           this.enable_command('reply-list', false);
       }
@@ -1548,7 +1497,7 @@
 
     // 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);
   };
@@ -1564,12 +1513,13 @@
 
     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);
     }
   };
 
@@ -1577,11 +1527,11 @@
   {
     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)
@@ -1669,16 +1619,19 @@
     return 0;
   };
 
-  this.open_window = function(url, width, height)
+  this.open_window = function(url, width)
   {
-    var w = Math.min(width, screen.width - 10),
-      h = Math.min(height, screen.height - 100),
-      l = (screen.width - w) / 2 + (screen.left || 0),
-      t = Math.max(0, (screen.height - h) / 2 + (screen.top || 0) - 20);
-
-    var wname = 'rcmextwin' + new Date().getTime(),
-      extwin = window.open(url + '&_extwin=1', wname, 'width='+w+',height='+h+',top='+t+',left='+l+',resizable=yes,toolbar=no,status=no');
-    extwin.moveTo(l,t);
+    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(width, page_width),
+      h = page_height, // always use same height
+      l = (win.screenLeft || win.screenX) + 20,
+      t = (win.screenTop || win.screenY) + 20,
+      wname = 'rcmextwin' + new Date().getTime(),
+      extwin = window.open(url + (url.match(/\?/) ? '&' : '?') + '_extwin=1', wname,
+        'width='+w+',height='+h+',top='+t+',left='+l+',resizable=yes,toolbar=no,status=no,location=no');
 
     // write loading... message to empty windows
     if (!url && extwin.document) {
@@ -1686,7 +1639,7 @@
     }
 
     // focus window, delayed to bring to front
-    window.setTimeout(function(){ extwin.focus(); }, 10);
+    window.setTimeout(function() { extwin.focus(); }, 10);
 
     return wname;
   };
@@ -1725,6 +1678,14 @@
     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 });
@@ -1884,7 +1845,8 @@
       else
         html = cols[c];
 
-      col.innerHTML = html;
+      if (html)
+        col.innerHTML = html;
 
       row.appendChild(col);
     }
@@ -1987,7 +1949,7 @@
     }
     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, 1000);
       else
         this.location_href(this.env.comm_path+url, target, true);
 
@@ -3013,11 +2975,12 @@
 
     // open new compose window
     if (this.env.compose_extwin && !this.env.extwin) {
-      this.open_window(url, 1150, 900);
+      this.open_window(url, 1150);
     }
     else {
       this.redirect(url);
-      window.resizeTo(Math.max(1150, $(window).width()), Math.max(900, $(window).height()));
+      if (this.env.extwin)
+        window.resizeTo(Math.max(1150, $(window).width()), $(window).height()+24);
     }
   };
 
@@ -3033,10 +2996,10 @@
       input_message = $("[name='_message']").get(0),
       html_mode = $("input[name='_is_html']").val() == '1',
       ac_fields = ['cc', 'bcc', 'replyto', 'followupto'],
-      ac_props;
+      ac_props, opener_rc = this.opener();
 
     // close compose step in opener
-    if (window.opener && opener.rcmail && opener.rcmail.env.action == 'compose') {
+    if (opener_rc && opener_rc.env.action == 'compose') {
       setTimeout(function(){ opener.history.back(); }, 100);
       this.env.opened_extwin = true;
     }
@@ -3059,7 +3022,7 @@
       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]);
       }
     }
@@ -3108,17 +3071,30 @@
     form._draft.value = draft ? '1' : '';
     form.action = this.add_url(form.action, '_unlock', msgid);
     form.action = this.add_url(form.action, '_lang', lang);
+
+    // register timer to notify about connection timeout
+    this.submit_timer = setTimeout(function(){
+      ref.set_busy(false, null, msgid);
+      ref.display_message(ref.get_label('requesttimedout'), 'error');
+    }, this.env.request_timeout * 1000);
+
     form.submit();
   };
 
   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++) {
@@ -3137,8 +3113,10 @@
     }
 
     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 });
     }
   };
@@ -3328,6 +3306,15 @@
 
   this.set_draft_id = function(id)
   {
+    var rc;
+
+    if (!this.env.draft_id && id && (rc = this.opener())) {
+      // refresh the drafts folder in opener window
+      if (rc.env.task == 'mail' && rc.env.action == '' && rc.env.mailbox == this.env.drafts_mailbox)
+        rc.command('checkmail');
+    }
+
+    this.env.draft_id = id;
     $("input[name='_draft_saveid']").val(id);
   };
 
@@ -3372,6 +3359,15 @@
     if (!show_sig)
       show_sig = this.env.show_sig;
 
+    // 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 cursor_pos, p = -1,
       id = obj.options[obj.selectedIndex].value,
       input_message = $("[name='_message']"),
@@ -3393,7 +3389,7 @@
         sig = this.env.signatures[sig].text;
         sig = sig.replace(/\r\n/g, '\n');
 
-        p = this.env.sig_above ? message.indexOf(sig) : message.lastIndexOf(sig);
+        p = this.env.top_posting ? message.indexOf(sig) : message.lastIndexOf(sig);
         if (p >= 0)
           message = message.substring(0, p) + message.substring(p+sig.length, message.length);
       }
@@ -3402,7 +3398,7 @@
         sig = this.env.signatures[id].text;
         sig = sig.replace(/\r\n/g, '\n');
 
-        if (this.env.sig_above) {
+        if (this.env.top_posting) {
           if (p >= 0) { // in place of removed signature
             message = message.substring(0, p) + sig + message.substring(p, message.length);
             cursor_pos = p - 1;
@@ -3446,7 +3442,7 @@
         sigElem = doc.createElement('div');
         sigElem.setAttribute('id', '_rc_sig');
 
-        if (this.env.sig_above) {
+        if (this.env.top_posting) {
           // if no existing sig and top posting then insert at caret pos
           editor.getWin().focus(); // correct focus in IE & Chrome
 
@@ -3647,7 +3643,8 @@
       // reset vars
       this.env.current_page = 1;
 
-      r = this.http_request('search', url, lock);
+      var action = this.env.action == 'compose' && this.contact_list ? 'search-contacts' : 'search';
+      r = this.http_request(action, url, lock);
 
       this.env.qsearch = {lock: lock, request: r};
     }
@@ -3702,13 +3699,19 @@
     this.env.search_id = null;
   };
 
-  this.sent_successfully = function(type, msg)
+  this.sent_successfully = function(type, msg, target)
   {
     this.display_message(msg, type);
 
-    if (this.env.extwin && window.opener && opener.rcmail) {
+    if (this.env.extwin) {
+      var rc = this.opener();
       this.lock_form(this.gui_objects.messageform);
-      opener.rcmail.display_message(msg, type);
+      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');
+      }
       setTimeout(function(){ window.close() }, 1000);
     }
     else {
@@ -4080,42 +4083,49 @@
     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);
       }
-      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('edit', id && writable);
-    this.enable_command('delete', list.selection.length && writable);
+    this.enable_command('delete', list.selection.length > 0 && writable);
 
     return false;
   };
@@ -4140,13 +4150,31 @@
 
     if (this.env.search_id)
       folder = 'S'+this.env.search_id;
-    else
+    else if (!this.env.search_request)
       folder = group ? 'G'+src+group : src;
-
-    this.select_folder(folder);
 
     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) {
@@ -4193,7 +4221,7 @@
     this.env.source = src;
     this.env.group = group;
 
-    // also send search request to get the right messages
+    // also send search request to get the right records
     if (this.env.search_request)
       url._search = this.env.search_request;
 
@@ -4202,16 +4230,38 @@
 
   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('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>'+prop.name+'</span>'));
+    }
+
+    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;
@@ -4222,7 +4272,9 @@
       if (!cid) {
         // unselect selected row(s)
         this.contact_list.clear_selection();
-        this.enable_command('delete', 'compose', false);
+
+        this.enable_command('compose', rec && rec.email);
+        this.enable_command('delete', rec && rec._type != 'group');
       }
     }
     else if (framed)
@@ -4276,7 +4328,7 @@
         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: source, _to: dest, _togid: to.id, _gid: group};
+          post_data = {_cid: cid, _source: this.env.source, _to: dest, _togid: to.id, _gid: group};
 
         this.http_post('copy', post_data, lock);
       }
@@ -4284,7 +4336,7 @@
     // target is an addressbook
     else if (to.id != source) {
       var lock = this.display_message(this.get_label('copyingcontact'), 'loading'),
-        post_data = {_cid: cid, _source: source, _to: to.id, _gid: group};
+        post_data = {_cid: cid, _source: this.env.source, _to: to.id, _gid: group};
 
       this.http_post('copy', post_data, lock);
     }
@@ -4333,7 +4385,7 @@
   };
 
   // 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;
 
@@ -4360,11 +4412,13 @@
         list.selection[0] = newcid;
         row.style.display = '';
       }
+
+      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;
@@ -4382,10 +4436,13 @@
     for (c in cols) {
       col = document.createElement('td');
       col.className = String(c).toLowerCase();
-      col.innerHTML = cols[c];
+      if (cols[c])
+        col.innerHTML = cols[c];
       row.appendChild(col);
     }
 
+    // store data in list member
+    list.data[cid] = data;
     list.insert_row(row);
 
     this.enable_command('export', list.rowcount > 0);
@@ -4395,10 +4452,11 @@
   {
     var ref = this, col;
 
-    this.set_photo_actions($('#ff_photo').val());
-
-    for (col in this.env.coltypes)
-      this.init_edit_field(col, null);
+    if (this.env.coltypes) {
+      this.set_photo_actions($('#ff_photo').val());
+      for (col in this.env.coltypes)
+        this.init_edit_field(col, null);
+    }
 
     $('.contactfieldgroup .row a.deletebutton').click(function() {
       ref.delete_edit_field(this);
@@ -4425,6 +4483,11 @@
     }
 
     $("input[type='text']:visible").first().focus();
+
+    // Submit search form on Enter
+    if (this.env.action == 'search')
+      $(this.gui_objects.editform).append($('<input type="submit">').hide())
+        .submit(function() { $('input.mainaction').click(); return false; });
   };
 
   this.group_create = function()
@@ -4443,7 +4506,7 @@
       this.name_input.bind('keydown', function(e){ return rcmail.add_input_keydown(e); });
       this.env.group_renaming = true;
 
-      var link, li = this.get_folder_li(this.env.source+this.env.group, 'rcmliG');
+      var link, li = this.get_folder_li('G'+this.env.source+this.env.group,'',true);
       if (li && (link = li.firstChild)) {
         $(link).hide().before(this.name_input);
       }
@@ -4464,7 +4527,7 @@
   this.remove_group_item = function(prop)
   {
     var li, key = 'G'+prop.source+prop.id;
-    if ((li = this.get_folder_li(key))) {
+    if ((li = this.get_folder_li(key,'',true))) {
       this.triggerEvent('group_delete', { source:prop.source, id:prop.id, li:li });
 
       li.parentNode.removeChild(li);
@@ -4486,8 +4549,22 @@
       this.name_input.bind('keydown', function(e){ return rcmail.add_input_keydown(e); });
       this.name_input_li = $('<li>').addClass(type).append(this.name_input);
 
-      var li = type == 'contactsearch' ? $('li:last', this.gui_objects.folderlist) : this.get_folder_li(this.env.source);
-      this.name_input_li.insertAfter(li);
+      var ul, li;
+
+      // find list (UL) element
+      if (type == 'contactsearch')
+        ul = this.gui_objects.folderlist;
+      else
+        ul = $('ul.groups', this.get_folder_li(this.env.source,'',true));
+
+      // append to the list
+      li = $('li:last', ul);
+      if (li.length)
+        this.name_input_li.insertAfter(li);
+      else {
+        this.name_input_li.appendTo(ul);
+        ul.show(); // make sure the list is visible
+      }
     }
 
     this.name_input.select().focus();
@@ -4544,11 +4621,13 @@
   this.reset_add_input = function()
   {
     if (this.name_input) {
+      var li = this.name_input.parent();
       if (this.env.group_renaming) {
-        var li = this.name_input.parent();
         li.children().last().show();
         this.env.group_renaming = false;
       }
+      else if ($('li', li.parent()).length == 1)
+        li.parent().hide();
 
       this.name_input.remove();
 
@@ -4587,7 +4666,7 @@
     this.reset_add_input();
 
     var key = 'G'+prop.source+prop.id,
-      li = this.get_folder_li(key),
+      li = this.get_folder_li(key,'',true),
       link;
 
     // group ID has changed, replace link node and identifiers
@@ -4626,8 +4705,8 @@
   this.add_contact_group_row = function(prop, li, reloc)
   {
     var row, name = prop.name.toUpperCase(),
-      sibling = this.get_folder_li(prop.source),
-      prefix = 'rcmliG' + this.html_identifier(prop.source);
+      sibling = this.get_folder_li(prop.source,'',true),
+      prefix = 'rcmli' + this.html_identifier('G'+prop.source, true);
 
     // When renaming groups, we need to remove it from DOM and insert it in the proper place
     if (reloc) {
@@ -4773,6 +4852,9 @@
           if (++colprop.count == colprop.limit && colprop.limit)
             $(menu).children('option[value="'+col+'"]').prop('disabled', true);
         }
+
+        if (contact._type != 'group')
+          list.draggable = true;
       }
     }
   };
@@ -4876,12 +4958,12 @@
         .attr('rel', id)
         .click(function() { return rcmail.command('listsearch', id, this); })
         .html(name),
-      li = $('<li>').attr({id: 'rcmli' + this.html_identifier(key), 'class': 'contactsearch'})
+      li = $('<li>').attr({ id:'rcmli' + this.html_identifier(key,true), 'class':'contactsearch' })
         .append(link),
       prop = {name:name, id:id, li:li[0]};
 
     this.add_saved_search_row(prop, li);
-    this.select_folder('S'+id);
+    this.select_folder(key,'',true);
     this.enable_command('search-delete', true);
     this.env.search_id = id;
 
@@ -4935,7 +5017,7 @@
   this.remove_search_item = function(id)
   {
     var li, key = 'S'+id;
-    if ((li = this.get_folder_li(key))) {
+    if ((li = this.get_folder_li(key,'',true))) {
       this.triggerEvent('search_delete', { id:id, li:li });
 
       li.parentNode.removeChild(li);
@@ -4957,7 +5039,7 @@
     }
 
     this.reset_qsearch();
-    this.select_folder('S'+id);
+    this.select_folder('S'+id, '', true);
 
     // reset vars
     this.env.current_page = 1;
@@ -5822,14 +5904,14 @@
 
         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++) {
@@ -6128,14 +6210,14 @@
     // send request
     this.log('HTTP GET: ' + url);
 
+    // reset keep-alive interval
+    this.start_keepalive();
+
     return $.ajax({
       type: 'GET', url: url, data: { _unlock:(lock?lock:0) }, dataType: 'json',
       success: function(data){ ref.http_response(data); },
       error: function(o, status, err) { ref.http_error(o, status, err, lock, action); }
     });
-
-    // reset keep-alive interval
-    this.start_keepalive();
   };
 
   // send a http POST request to the server
@@ -6163,14 +6245,14 @@
     // send request
     this.log('HTTP POST: ' + url);
 
+    // reset keep-alive interval
+    this.start_keepalive();
+
     return $.ajax({
       type: 'POST', url: url, data: postdata, dataType: 'json',
       success: function(data){ ref.http_response(data); },
       error: function(o, status, err) { ref.http_error(o, status, err, lock, action); }
     });
-
-    // reset keep-alive interval
-    this.start_keepalive();
   };
 
   // aborts ajax request
@@ -6326,12 +6408,29 @@
 
     // redirect to url specified in location header if not empty
     var location_url = request.getResponseHeader("Location");
-    if (location_url)
+    if (location_url && this.env.action != 'compose')  // don't redirect on compose screen, contents might get lost (#1488926)
       this.redirect(location_url);
+
+    // 403 Forbidden response (CSRF prevention) - reload the page.
+    // In case there's a new valid session it will be used, otherwise
+    // login form will be presented (#1488960).
+    if (request.status == 403) {
+      (this.is_framed() ? parent : window).location.reload();
+      return;
+    }
 
     // re-send keep-alive requests after 30 seconds
     if (action == 'keep-alive')
       setTimeout(function(){ ref.keep_alive(); ref.start_keepalive(); }, 30000);
+  };
+
+  // callback when an iframe finished loading
+  this.iframe_loaded = function(unlock)
+  {
+    this.set_busy(false, null, unlock);
+
+    if (this.submit_timer)
+      clearTimeout(this.submit_timer);
   };
 
   // post the given form to a hidden iframe
@@ -6433,9 +6532,10 @@
         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'); }
       });
@@ -6475,7 +6575,7 @@
             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
@@ -6572,6 +6672,17 @@
   /*********            helper methods            *********/
   /********************************************************/
 
+  // get window.opener.rcmail if available
+  this.opener = function()
+  {
+    // catch Error: Permission denied to access property rcmail
+    try {
+      if (window.opener && !opener.closed && opener.rcmail)
+        return opener.rcmail;
+    }
+    catch (e) {}
+  };
+
   // check if we're in show mode or if we have a unique selection
   // and return the message uid
   this.get_single_uid = function()

--
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