Merge branch 'dev-accessibility'

Conflicts:
	program/include/rcmail_output_html.php
	program/js/app.js
	program/js/treelist.js
	program/lib/Roundcube/html.php
	skins/larry/styles.css
	skins/larry/templates/compose.html

4 files changed, 720 insertions, 184 deletions

diff --git a/program/js/app.js b/program/js/app.js
index 11204ffb2..d12dd81ca 100644
--- a/program/js/app.js
+++ b/program/js/app.js
@@ -46,6 +46,7 @@ function rcube_webmail()
   this.messages = {};
   this.group2expand = {};
   this.http_request_jobs = {};
+  this.menu_stack = new Array();
 
   // webmail client settings
   this.dblclick_time = 500;
@@ -197,7 +198,10 @@ function rcube_webmail()
 
     // enable general commands
     this.enable_command('close', 'logout', 'mail', 'addressbook', 'settings', 'save-pref',
-      'compose', 'undo', 'about', 'switch-task', 'menu-open', 'menu-save', true);
+      'compose', 'undo', 'about', 'switch-task', 'menu-open', 'menu-close', 'menu-save', true);
+
+    // set active task button
+    this.set_button(this.task, 'sel');
 
     if (this.env.permaurl)
       this.enable_command('permaurl', 'extwin', true);
@@ -232,8 +236,7 @@ function rcube_webmail()
             return ref.command('sort', $(this).attr('rel'), this);
           });
 
-          document.onmouseup = function(e){ return ref.doc_mouse_up(e); };
-          this.gui_objects.messagelist.parentNode.onmousedown = function(e){ return ref.click_on_list(e); };
+          this.gui_objects.messagelist.parentNode.onclick = function(e){ return ref.click_on_list(e || window.event); };
 
           this.enable_command('toggle_status', 'toggle_flag', 'sort', true);
           this.enable_command('set-listmode', this.env.threads && !this.is_multifolder_listing());
@@ -276,7 +279,7 @@ function rcube_webmail()
           this.env.address_group_stack = [];
           this.env.compose_commands = ['send-attachment', 'remove-attachment', 'send', 'cancel',
             'toggle-editor', 'list-adresses', 'pushgroup', 'search', 'reset-search', 'extwin',
-            'insert-response', 'save-response'];
+            'insert-response', 'save-response', 'menu-open', 'menu-close'];
 
           if (this.env.drafts_mailbox)
             this.env.compose_commands.push('savedraft')
@@ -302,10 +305,12 @@ function rcube_webmail()
             $('a.insertresponse', this.gui_objects.responseslist)
               .attr('unselectable', 'on')
               .mousedown(function(e){ return rcube_event.cancel(e); })
-              .mouseup(function(e){
-                ref.command('insert-response', $(this).attr('rel'));
-                $(document.body).trigger('mouseup');  // hides the menu
-                return rcube_event.cancel(e);
+              .bind('mouseup keypress', function(e){
+                if (e.type == 'mouseup' || rcube_event.get_keycode(e) == 13) {
+                  ref.command('insert-response', $(this).attr('rel'));
+                  $(document.body).trigger('mouseup');  // hides the menu
+                  return rcube_event.cancel(e);
+                }
               });
 
             // avoid textarea loosing focus when hitting the save-response button/link
@@ -314,8 +319,6 @@ function rcube_webmail()
             }
           }
 
-          document.onmouseup = function(e){ return ref.doc_mouse_up(e); };
-
           // init message compose form
           this.init_messageform();
         }
@@ -339,11 +342,21 @@ function rcube_webmail()
         // init address book widget
         if (this.gui_objects.contactslist) {
           this.contact_list = new rcube_list_widget(this.gui_objects.contactslist,
-            { multiselect:true, draggable:false, keyboard:false });
+            { multiselect:true, draggable:false, keyboard:true });
           this.contact_list
             .addEventListener('initrow', function(o) { ref.triggerEvent('insertrow', { cid:o.uid, row:o }); })
             .addEventListener('select', function(o) { ref.compose_recipient_select(o); })
             .addEventListener('dblclick', function(o) { ref.compose_add_recipient('to'); })
+            .addEventListener('keypress', function(o) {
+              if (o.key_pressed == o.ENTER_KEY) {
+                if (!ref.compose_add_recipient('to')) {
+                  // execute link action on <enter> if not a recipient entry
+                  if (o.last_selected && String(o.last_selected).charAt(0) == 'G') {
+                    $(o.rows[o.last_selected].obj).find('a').first().click();
+                  }
+                }
+              }
+            })
             .init();
         }
 
@@ -394,7 +407,6 @@ function rcube_webmail()
             this.contact_list.highlight_row(this.env.cid);
 
           this.gui_objects.contactslist.parentNode.onmousedown = function(e){ return ref.click_on_list(e); };
-          document.onmouseup = function(e){ return ref.doc_mouse_up(e); };
 
           $(this.gui_objects.qsearchbox).focusin(function() { ref.contact_list.blur(); });
 
@@ -449,9 +461,14 @@ function rcube_webmail()
 
         if (this.gui_objects.identitieslist) {
           this.identity_list = new rcube_list_widget(this.gui_objects.identitieslist,
-            {multiselect:false, draggable:false, keyboard:false});
+            {multiselect:false, draggable:false, keyboard:true});
           this.identity_list
             .addEventListener('select', function(o) { ref.identity_select(o); })
+            .addEventListener('keypress', function(o) {
+              if (o.key_pressed == o.ENTER_KEY) {
+                ref.identity_select(o);
+              }
+            })
             .init()
             .focus();
 
@@ -459,9 +476,10 @@ function rcube_webmail()
             this.identity_list.highlight_row(this.env.iid);
         }
         else if (this.gui_objects.sectionslist) {
-          this.sections_list = new rcube_list_widget(this.gui_objects.sectionslist, {multiselect:false, draggable:false, keyboard:false});
+          this.sections_list = new rcube_list_widget(this.gui_objects.sectionslist, {multiselect:false, draggable:false, keyboard:true});
           this.sections_list
             .addEventListener('select', function(o) { ref.section_select(o); })
+            .addEventListener('keypress', function(o) { if (o.key_pressed == o.ENTER_KEY) ref.section_select(o); })
             .init()
             .focus();
         }
@@ -469,7 +487,7 @@ function rcube_webmail()
           this.init_subscription_list();
         }
         else if (this.gui_objects.responseslist) {
-          this.responses_list = new rcube_list_widget(this.gui_objects.responseslist, {multiselect:false, draggable:false, keyboard:false});
+          this.responses_list = new rcube_list_widget(this.gui_objects.responseslist, {multiselect:false, draggable:false, keyboard:true});
           this.responses_list
             .addEventListener('select', function(list) {
               var win, id = list.get_single_selection();
@@ -559,6 +577,18 @@ function rcube_webmail()
         .get(0).addEventListener('drop', function(e){ return ref.file_dropped(e); }, false);
     }
 
+    // catch document (and iframe) mouse clicks
+    var body_mouseup = function(e){ return ref.doc_mouse_up(e); };
+    $(document.body)
+      .bind('mouseup', body_mouseup)
+      .bind('keydown', function(e){ return ref.doc_keypress(e); });
+
+    $('iframe').load(function(e) {
+        try { $(this.contentDocument || this.contentWindow).on('mouseup', body_mouseup);  }
+        catch (e) {/* catch possible "Permission denied" error in IE */ }
+      })
+      .contents().on('mouseup', body_mouseup);
+
     // trigger init event hook
     this.triggerEvent('init', { task:this.task, action:this.env.action });
 
@@ -591,7 +621,7 @@ function rcube_webmail()
   {
     var ret, uid, cid, url, flag, aborted = false;
 
-    if (obj && obj.blur)
+    if (obj && obj.blur && !(event || rcube_event.is_keyboard(event)))
       obj.blur();
 
     // do nothing if interface is locked by other command (with exception for searching reset)
@@ -634,8 +664,8 @@ function rcube_webmail()
     }
 
     // trigger plugin hooks
-    this.triggerEvent('actionbefore', {props:props, action:command});
-    ret = this.triggerEvent('before'+command, props);
+    this.triggerEvent('actionbefore', {props:props, action:command, originalEvent:event});
+    ret = this.triggerEvent('before'+command, props || event);
     if (ret !== undefined) {
       // abort if one of the handlers returned false
       if (ret === false)
@@ -707,9 +737,15 @@ function rcube_webmail()
           var mimetype = this.env.attachments[props.id];
           this.enable_command('open-attachment', mimetype && this.env.mimetypes && $.inArray(mimetype, this.env.mimetypes) >= 0);
         }
+        this.show_menu(props, props.show || undefined, event);
+        break;
+
+      case 'menu-close':
+        this.hide_menu(props, event);
+        break;
 
       case 'menu-save':
-        this.triggerEvent(command, {props:props});
+        this.triggerEvent(command, {props:props, originalEvent:event});
         return false;
 
       case 'open':
@@ -887,14 +923,14 @@ function rcube_webmail()
       case 'move':
       case 'moveto': // deprecated
         if (this.task == 'mail')
-          this.move_messages(props, obj);
+          this.move_messages(props, event);
         else if (this.task == 'addressbook')
           this.move_contacts(props);
         break;
 
       case 'copy':
         if (this.task == 'mail')
-          this.copy_messages(props, obj);
+          this.copy_messages(props, event);
         else if (this.task == 'addressbook')
           this.copy_contacts(props);
         break;
@@ -1450,7 +1486,8 @@ function rcube_webmail()
     if (menu && modkey == SHIFT_KEY && this.commands['copy']) {
       var pos = rcube_event.get_mouse_pos(e);
       this.env.drag_target = target;
-      $(menu).css({top: (pos.y-10)+'px', left: (pos.x-10)+'px'}).show();
+      this.show_menu(this.gui_objects.dragmenu.id, true, e);
+      $(menu).css({top: (pos.y-10)+'px', left: (pos.x-10)+'px'});
       return true;
     }
 
@@ -1566,17 +1603,22 @@ function rcube_webmail()
     }
   };
 
+  // global mouse-click handler to cleanup some UI elements
   this.doc_mouse_up = function(e)
   {
-    var list, id;
+    var list, id, target = rcube_event.get_target(e);
 
     // ignore event if jquery UI dialog is open
-    if ($(rcube_event.get_target(e)).closest('.ui-dialog, .ui-widget-overlay').length)
+    if ($(target).closest('.ui-dialog, .ui-widget-overlay').length)
       return;
 
-    list = this.message_list || this.contact_list;
-    if (list && !rcube_mouse_is_over(e, list.list.parentNode))
-      list.blur();
+    // remove focus from list widgets
+    if (window.rcube_list_widget && rcube_list_widget._instances.length) {
+      $.each(rcube_list_widget._instances, function(i,list){
+        if (list && !rcube_mouse_is_over(e, list.list.parentNode))
+          list.blur();
+      });
+    }
 
     // reset 'pressed' buttons
     if (this.buttons_sel) {
@@ -1585,17 +1627,87 @@ function rcube_webmail()
           this.button_out(this.buttons_sel[id], id);
       this.buttons_sel = {};
     }
+
+    // reset popup menus; delayed to have updated menu_stack data
+    window.setTimeout(function(e){
+      var obj, skip, config, id, i, parents = $(target).parents();
+      for (i = ref.menu_stack.length - 1; i >= 0; i--) {
+        id = ref.menu_stack[i];
+        obj = $('#' + id);
+
+        if (obj.is(':visible')
+          && target != obj.data('opener')
+          && target != obj.get(0)  // check if scroll bar was clicked (#1489832)
+          && !parents.is(obj.data('opener'))
+          && id != skip
+          && (obj.attr('data-editable') != 'true' || !$(target).parents('#' + id).length)
+          && (obj.attr('data-sticky') != 'true' || !rcube_mouse_is_over(e, obj.get(0)))
+        ) {
+          ref.hide_menu(id, e);
+        }
+        skip = obj.data('parent');
+      }
+    }, 10);
   };
 
+  // global keypress event handler
+  this.doc_keypress = function(e)
+  {
+    // Helper method to move focus to the next/prev active menu item
+    var focus_menu_item = function(dir) {
+      var obj, item, mod = dir < 0 ? 'prevAll' : 'nextAll', limit = dir < 0 ? 'last' : 'first';
+      if (ref.focused_menu && (obj = $('#'+ref.focused_menu))) {
+        item = obj.find(':focus').closest('li')[mod](':has(:not([aria-disabled=true]))').find('a,input')[limit]();
+        if (!item.length)
+          item = obj.find(':focus').closest('ul')[mod](':has(:not([aria-disabled=true]))').find('a,input')[limit]();
+        return item.focus().length;
+      }
+
+      return 0;
+    };
+
+    var target = e.target || {},
+      keyCode = rcube_event.get_keycode(e);
+
+    if (e.keyCode != 27 && (!this.menu_keyboard_active || target.nodeName == 'TEXTAREA' || target.nodeName == 'SELECT')) {
+      return true;
+    }
+
+    switch (keyCode) {
+      case 38:
+      case 40:
+      case 63232: // "up", in safari keypress
+      case 63233: // "down", in safari keypress
+        focus_menu_item(mod = keyCode == 38 || keyCode == 63232 ? -1 : 1);
+        break;
+
+      case 9:   // tab
+        if (this.focused_menu) {
+          var mod = rcube_event.get_modifier(e);
+          if (!focus_menu_item(mod == SHIFT_KEY ? -1 : 1)) {
+            this.hide_menu(this.focused_menu, e);
+          }
+        }
+        return rcube_event.cancel(e);
+
+      case 27:  // esc
+        if (this.menu_stack.length)
+          this.hide_menu(this.menu_stack[this.menu_stack.length-1], e);
+        break;
+    }
+
+    return true;
+  }
+
   this.click_on_list = function(e)
   {
     if (this.gui_objects.qsearchbox)
       this.gui_objects.qsearchbox.blur();
 
     if (this.message_list)
-      this.message_list.focus();
+      this.message_list.focus(e);
     else if (this.contact_list)
-      this.contact_list.focus();
+      this.contact_list.focus(e);
 
     return true;
   };
@@ -1880,7 +1992,7 @@ function rcube_webmail()
       flags: flags.extra_flags
     });
 
-    var c, n, col, html, css_class,
+    var c, n, col, html, css_class, label, status_class = '', status_label = '',
       tree = '', expando = '',
       list = this.message_list,
       rows = list.rows,
@@ -1897,17 +2009,26 @@ function rcube_webmail()
     css_class = 'msgicon';
     if (this.env.status_col === null) {
       css_class += ' status';
-      if (flags.deleted)
-        css_class += ' deleted';
-      else if (!flags.seen)
-        css_class += ' unread';
-      else if (flags.unread_children > 0)
-        css_class += ' unreadchildren';
+      if (flags.deleted) {
+        status_class += ' deleted';
+        status_label += this.get_label('deleted') + ' ';
+      }
+      else if (!flags.seen) {
+        status_class += ' unread';
+        status_label += this.get_label('unread') + ' ';
+      }
+      else if (flags.unread_children > 0) {
+        status_class += ' unreadchildren';
+      }
+    }
+    if (flags.answered) {
+      status_class += ' replied';
+      status_label += this.get_label('replied') + ' ';
+    }
+    if (flags.forwarded) {
+      status_class += ' forwarded';
+      status_label += this.get_label('replied') + ' ';
     }
-    if (flags.answered)
-      css_class += ' replied';
-    if (flags.forwarded)
-      css_class += ' forwarded';
 
     // update selection
     if (message.selected && !list.in_selection(uid))
@@ -1944,15 +2065,17 @@ function rcube_webmail()
         row_class += ' unroot';
     }
 
-    tree += '<span id="msgicn'+row.id+'" class="'+css_class+'">&nbsp;</span>';
+    tree += '<span id="msgicn'+row.id+'" class="'+css_class+status_class+'" title="'+status_label+'"></span>';
     row.className = row_class;
 
     // build subject link
     if (cols.subject) {
-      var action = flags.mbox == this.env.drafts_mailbox ? 'compose' : 'show';
-      var uid_param = flags.mbox == this.env.drafts_mailbox ? '_draft_uid' : '_uid';
-      cols.subject = '<a href="./?_task=mail&_action='+action+'&_mbox='+urlencode(flags.mbox)+'&'+uid_param+'='+urlencode(uid)+'"'+
-        ' onclick="return rcube_event.cancel(event)" onmouseover="rcube_webmail.long_subject_title(this,'+(message.depth+1)+')"><span>'+cols.subject+'</span></a>';
+      var action  = flags.mbox == this.env.drafts_mailbox ? 'compose' : 'show',
+        uid_param = flags.mbox == this.env.drafts_mailbox ? '_draft_uid' : '_uid',
+        query = { _mbox: flags.mbox };
+      query[uid_param] = uid;
+      cols.subject = '<a href="' + this.url(action, query) + '" onclick="return rcube_event.keyboard_only(event)"' +
+        ' onmouseover="rcube_webmail.long_subject_title(this,'+(message.depth+1)+')" tabindex="-1"><span>'+cols.subject+'</span></a>';
     }
 
     // add each submitted col
@@ -1966,28 +2089,36 @@ function rcube_webmail()
 
       if (c == 'flag') {
         css_class = (flags.flagged ? 'flagged' : 'unflagged');
-        html = '<span id="flagicn'+row.id+'" class="'+css_class+'">&nbsp;</span>';
+        label = this.get_label(css_class);
+        html = '<span id="flagicn'+row.id+'" class="'+css_class+'" title="'+label+'"></span>';
       }
       else if (c == 'attachment') {
+        label = this.get_label('withattachment');
         if (flags.attachmentClass)
-          html = '<span class="'+flags.attachmentClass+'">&nbsp;</span>';
+          html = '<span class="'+flags.attachmentClass+'" title="'+label+'"></span>';
         else if (/application\/|multipart\/(m|signed)/.test(flags.ctype))
-          html = '<span class="attachment">&nbsp;</span>';
+          html = '<span class="attachment" title="'+label+'"></span>';
         else if (/multipart\/report/.test(flags.ctype))
-          html = '<span class="report">&nbsp;</span>';
-        else
+          html = '<span class="report"></span>';
+          else
           html = '&nbsp;';
       }
       else if (c == 'status') {
-        if (flags.deleted)
+        label = '';
+        if (flags.deleted) {
           css_class = 'deleted';
-        else if (!flags.seen)
+          label = this.get_label('deleted');
+        }
+        else if (!flags.seen) {
           css_class = 'unread';
-        else if (flags.unread_children > 0)
+          label = this.get_label('unread');
+        }
+        else if (flags.unread_children > 0) {
           css_class = 'unreadchildren';
+        }
         else
           css_class = 'msgicon';
-        html = '<span id="statusicn'+row.id+'" class="'+css_class+'">&nbsp;</span>';
+        html = '<span id="statusicn'+row.id+'" class="'+css_class+status_class+'" title="'+label+'"></span>';
       }
       else if (c == 'threads')
         html = expando;
@@ -1997,8 +2128,10 @@ function rcube_webmail()
         html = tree + cols[c];
       }
       else if (c == 'priority') {
-        if (flags.prio > 0 && flags.prio < 6)
-          html = '<span class="prio'+flags.prio+'">&nbsp;</span>';
+        if (flags.prio > 0 && flags.prio < 6) {
+          label = this.get_label('priority') + ' ' + flags.prio;
+          html = '<span class="prio'+flags.prio+'" title="'+label+'"></span>';
+        }
         else
           html = '&nbsp;';
       }
@@ -2308,7 +2441,6 @@ function rcube_webmail()
   this.clear_message_list = function()
   {
     this.env.messages = {};
-    this.last_selected = 0;
 
     this.show_contentframe(false);
     if (this.message_list)
@@ -2327,6 +2459,7 @@ function rcube_webmail()
       url._page = page;
 
     this.http_request('list', url, lock);
+    this.update_state({ _mbox: mbox, _page: (page && page > 1 ? page : null) });
   };
 
   // removes messages that doesn't exists from list selection array
@@ -2600,7 +2733,7 @@ function rcube_webmail()
   // set message icon
   this.set_message_icon = function(uid)
   {
-    var css_class,
+    var css_class, label = '',
       row = this.message_list.rows[uid];
 
     if (!row)
@@ -2608,38 +2741,55 @@ function rcube_webmail()
 
     if (row.icon) {
       css_class = 'msgicon';
-      if (row.deleted)
+      if (row.deleted) {
         css_class += ' deleted';
-      else if (row.unread)
+        label += this.get_label('deleted') + ' ';
+      }
+      else if (row.unread) {
         css_class += ' unread';
+        label += this.get_label('unread') + ' ';
+      }
       else if (row.unread_children)
         css_class += ' unreadchildren';
       if (row.msgicon == row.icon) {
-        if (row.replied)
+        if (row.replied) {
           css_class += ' replied';
-        if (row.forwarded)
+          label += this.get_label('replied') + ' ';
+        }
+        if (row.forwarded) {
           css_class += ' forwarded';
+          label += this.get_label('forwarded') + ' ';
+        }
         css_class += ' status';
       }
 
-      row.icon.className = css_class;
+      $(row.icon).attr('class', css_class).attr('title', label);
     }
 
     if (row.msgicon && row.msgicon != row.icon) {
+      label = '';
       css_class = 'msgicon';
-      if (!row.unread && row.unread_children)
+      if (!row.unread && row.unread_children) {
         css_class += ' unreadchildren';
-      if (row.replied)
+      }
+      if (row.replied) {
         css_class += ' replied';
-      if (row.forwarded)
+        label += this.get_label('replied') + ' ';
+      }
+      if (row.forwarded) {
         css_class += ' forwarded';
+        label += this.get_label('forwarded') + ' ';
+      }
 
-      row.msgicon.className = css_class;
+      $(row.msgicon).attr('class', css_class).attr('title', label);
     }
 
     if (row.flagicon) {
       css_class = (row.flagged ? 'flagged' : 'unflagged');
-      row.flagicon.className = css_class;
+      label = this.get_label(css_class);
+      $(row.flagicon).attr('class', css_class)
+        .attr('aria-label', label)
+        .attr('title', label);
     }
   };
 
@@ -2693,12 +2843,12 @@ function rcube_webmail()
   };
 
   // copy selected messages to the specified mailbox
-  this.copy_messages = function(mbox, obj)
+  this.copy_messages = function(mbox, event)
   {
     if (mbox && typeof mbox === 'object')
       mbox = mbox.id;
     else if (!mbox)
-      return this.folder_selector(obj, function(folder) { ref.command('copy', folder); });
+      return this.folder_selector(event, function(folder) { ref.command('copy', folder); });
 
     // exit if current or no mailbox specified
     if (!mbox || mbox == this.env.mailbox)
@@ -2715,12 +2865,12 @@ function rcube_webmail()
   };
 
   // move selected messages to the specified mailbox
-  this.move_messages = function(mbox, obj)
+  this.move_messages = function(mbox, event)
   {
     if (mbox && typeof mbox === 'object')
       mbox = mbox.id;
     else if (!mbox)
-      return this.folder_selector(obj, function(folder) { ref.command('move', folder); });
+      return this.folder_selector(event, function(folder) { ref.command('move', folder); });
 
     // exit if current or no mailbox specified
     if (!mbox || (mbox == this.env.mailbox && !this.is_multifolder_listing()))
@@ -3286,7 +3436,7 @@ function rcube_webmail()
     this.env.recipients_delimiter = this.env.recipients_separator + ' ';
 
     obj.keydown(function(e) { return ref.ksearch_keydown(e, this, props); })
-      .attr('autocomplete', 'off');
+      .attr({ 'autocomplete': 'off', 'aria-autocomplete': 'list', 'aria-expanded': 'false', 'role': 'combobox' });
   };
 
   this.submit_messageform = function(draft)
@@ -3357,6 +3507,8 @@ function rcube_webmail()
       input.val(oldval + recipients.join(delim + ' ') + delim + ' ');
       this.triggerEvent('add-recipient', { field:field, recipients:recipients });
     }
+
+    return recipients.length;
   };
 
   // checks the input fields before sending a message
@@ -3507,15 +3659,18 @@ function rcube_webmail()
       $('<a>').addClass('insertresponse active')
         .attr('href', '#')
         .attr('rel', key)
+        .attr('tabindex', '0')
         .html(this.quote_html(response.name))
         .appendTo(li)
         .mousedown(function(e){
           return rcube_event.cancel(e);
         })
-        .mouseup(function(e){
-          ref.command('insert-response', key);
-          $(document.body).trigger('mouseup');  // hides the menu
-          return rcube_event.cancel(e);
+        .bind('mouseup keypress', function(e){
+          if (e.type == 'mouseup' || rcube_event.get_keycode(e) == 13) {
+            ref.command('insert-response', $(this).attr('rel'));
+            $(document.body).trigger('mouseup');  // hides the menu
+            return rcube_event.cancel(e);
+          }
         });
     }
   };
@@ -3787,7 +3942,7 @@ function rcube_webmail()
 
       // cleanup
       rx = new RegExp(rx_delim + '\\s*' + rx_delim, 'g');
-      input_val = input_val.replace(rx, delim);
+      input_val = String(input_val).replace(rx, delim);
       rx = new RegExp('^[\\s' + rx_delim + ']+');
       input_val = input_val.replace(rx, '');
 
@@ -4155,7 +4310,7 @@ function rcube_webmail()
           return;
 
         var dir = key == 38 ? 1 : 0,
-          highlight = document.getElementById('rcmksearchSelected');
+          highlight = document.getElementById('rcmkSearchItem' + this.ksearch_selected);
 
         if (!highlight)
           highlight = this.ksearch_pane.__ul.firstChild;
@@ -4204,14 +4359,14 @@ function rcube_webmail()
 
   this.ksearch_select = function(node)
   {
-    var current = $('#rcmksearchSelected');
-    if (current[0] && node) {
-      current.removeAttr('id').removeClass('selected');
+    if (this.ksearch_pane && node) {
+      this.ksearch_pane.find('li.selected').removeClass('selected').removeAttr('aria-selected');
     }
 
     if (node) {
-      $(node).attr('id', 'rcmksearchSelected').addClass('selected');
+      $(node).addClass('selected').attr('aria-selected', 'true');
       this.ksearch_selected = node._rcm_id;
+      $(this.ksearch_input).attr('aria-activedescendant', 'rcmkSearchItem' + this.ksearch_selected);
     }
   };
 
@@ -4340,16 +4495,20 @@ function rcube_webmail()
       return;
 
     // display search results
-    var i, len, ul, li, text, type, init,
+    var i, id, len, ul, text, type, init,
       value = this.ksearch_value,
       maxlen = this.env.autocomplete_max ? this.env.autocomplete_max : 15;
 
     // create results pane if not present
     if (!this.ksearch_pane) {
       ul = $('<ul>');
-      this.ksearch_pane = $('<div>').attr('id', 'rcmKSearchpane')
+      this.ksearch_pane = $('<div>').attr('id', 'rcmKSearchpane').attr('role', 'listbox')
         .css({ position:'absolute', 'z-index':30000 }).append(ul).appendTo(document.body);
       this.ksearch_pane.__ul = ul[0];
+
+      // register (delegate) event handlers
+      ul.on('mouseover', 'li', function(e){ ref.ksearch_select(e.target); })
+        .on('onmouseup', 'li', function(e){ ref.ksearch_click(e.target); })
     }
 
     ul = this.ksearch_pane.__ul;
@@ -4374,23 +4533,29 @@ function rcube_webmail()
       for (i=0; i < len && maxlen > 0; i++) {
         text = typeof results[i] === 'object' ? results[i].name : results[i];
         type = typeof results[i] === 'object' ? results[i].type : '';
-        li = document.createElement('LI');
-        li.innerHTML = text.replace(new RegExp('('+RegExp.escape(value)+')', 'ig'), '##$1%%').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/##([^%]+)%%/g, '<b>$1</b>');
-        li.onmouseover = function(){ ref.ksearch_select(this); };
-        li.onmouseup = function(){ ref.ksearch_click(this) };
-        li._rcm_id = this.env.contacts.length + i;
-        if (type) li.className = type;
-        ul.appendChild(li);
+        id = i + this.env.contacts.length;
+        $('<li>').attr('id', 'rcmkSearchItem' + id)
+          .attr('role', 'option')
+          .html(this.quote_html(text.replace(new RegExp('('+RegExp.escape(value)+')', 'ig'), '##$1%%')).replace(/##([^%]+)%%/g, '<b>$1</b>'))
+          .addClass(type || '')
+          .appendTo(ul)
+          .get(0)._rcm_id = id;
         maxlen -= 1;
       }
     }
 
     if (ul.childNodes.length) {
+      // set the right aria-* attributes to the input field
+      $(this.ksearch_input)
+        .attr('aria-haspopup', 'true')
+        .attr('aria-expanded', 'true')
+        .attr('aria-owns', 'rcmKSearchpane');
+
       this.ksearch_pane.show();
+
       // select the first
       if (!this.env.contacts.length) {
-        $('li:first', ul).attr('id', 'rcmksearchSelected').addClass('selected');
-        this.ksearch_selected = 0;
+        this.ksearch_select($('li:first', ul).get(0));
       }
     }
 
@@ -4427,6 +4592,12 @@ function rcube_webmail()
     if (this.ksearch_pane)
       this.ksearch_pane.hide();
 
+    $(this.ksearch_input)
+      .attr('aria-haspopup', 'false')
+      .attr('aria-expanded', 'false')
+      .removeAttr('aria-activedescendant')
+      .removeAttr('aria-owns');
+
     this.ksearch_destroy();
   };
 
@@ -4631,6 +4802,7 @@ function rcube_webmail()
       // add link to pop back to parent group
       if (this.env.address_group_stack.length > 1) {
         $('<a href="#list">...</a>')
+          .attr('title', this.gettext('uponelevel'))
           .addClass('poplink')
           .appendTo(boxtitle)
           .click(function(e){ return ref.command('popgroup','',this); });
@@ -5174,6 +5346,7 @@ function rcube_webmail()
 
       if (appendcontainer.length && appendcontainer.get(0).nodeName == 'FIELDSET') {
         var input, colprop = this.env.coltypes[col],
+          input_id = 'ff_' + col + (colprop.count || 0),
           row = $('<div>').addClass('row'),
           cell = $('<div>').addClass('contactfieldcontent data'),
           label = $('<div>').addClass('contactfieldlabel label');
@@ -5181,14 +5354,14 @@ function rcube_webmail()
         if (colprop.subtypes_select)
           label.html(colprop.subtypes_select);
         else
-          label.html(colprop.label);
+          label.html('<label for="' + input_id + '">' + colprop.label + '</label>');
 
         var name_suffix = colprop.limit != 1 ? '[]' : '';
 
         if (colprop.type == 'text' || colprop.type == 'date') {
           input = $('<input>')
             .addClass('ff_'+col)
-            .attr({type: 'text', name: '_'+col+name_suffix, size: colprop.size})
+            .attr({type: 'text', name: '_'+col+name_suffix, size: colprop.size, id: input_id})
             .appendTo(cell);
 
           this.init_edit_field(col, input);
@@ -5199,7 +5372,7 @@ function rcube_webmail()
         else if (colprop.type == 'textarea') {
           input = $('<textarea>')
             .addClass('ff_'+col)
-            .attr({ name: '_'+col+name_suffix, cols:colprop.size, rows:colprop.rows })
+            .attr({ name: '_'+col+name_suffix, cols:colprop.size, rows:colprop.rows, id: input_id })
             .appendTo(cell);
 
           this.init_edit_field(col, input);
@@ -5235,7 +5408,7 @@ function rcube_webmail()
         else if (colprop.type == 'select') {
           input = $('<select>')
             .addClass('ff_'+col)
-            .attr('name', '_'+col+name_suffix)
+            .attr({ 'name': '_'+col+name_suffix, id: input_id })
             .appendTo(cell);
 
           var options = input.attr('options');
@@ -5542,7 +5715,7 @@ function rcube_webmail()
     this.last_sub_rx = RegExp('['+delim+']?[^'+delim+']+$');
 
     this.subscription_list = new rcube_list_widget(this.gui_objects.subscriptionlist,
-      {multiselect:false, draggable:true, keyboard:false, toggleselect:true});
+      {multiselect:false, draggable:true, keyboard:true, toggleselect:true});
     this.subscription_list
       .addEventListener('select', function(o){ ref.subscription_select(o); })
       .addEventListener('dragstart', function(o){ ref.drag_active = true; })
@@ -5551,7 +5724,8 @@ function rcube_webmail()
         row.obj.onmouseover = function() { ref.focus_subscription(row.id); };
         row.obj.onmouseout = function() { ref.unfocus_subscription(row.id); };
       })
-      .init();
+      .init()
+      .focus();
 
     $('#mailboxroot')
       .mouseover(function(){ ref.focus_subscription(this.id); })
@@ -5976,15 +6150,12 @@ function rcube_webmail()
         init_button(cmd, this.buttons[cmd][i]);
       }
     }
-
-    // set active task button
-    this.set_button(this.task, 'sel');
   };
 
   // set button to a specific state
   this.set_button = function(command, state)
   {
-    var n, button, obj, a_buttons = this.buttons[command],
+    var n, button, obj, $obj, a_buttons = this.buttons[command],
       len = a_buttons ? a_buttons.length : 0;
 
     for (n=0; n<len; n++) {
@@ -6019,8 +6190,15 @@ function rcube_webmail()
         obj.disabled = state == 'pas';
       }
       else if (button.type == 'uibutton') {
+        button.status = state;
         $(obj).button('option', 'disabled', state == 'pas');
       }
+      else {
+        $obj = $(obj);
+        $obj
+          .attr('tabindex', state == 'pas' || state == 'sel' ? '-1' : ($obj.attr('data-tabindex') || '0'))
+          .attr('aria-disabled', state == 'pas' || state == 'sel' ? 'true' : 'false');
+      }
     }
   };
 
@@ -6144,7 +6322,8 @@ function rcube_webmail()
       this.messages[key].labels = [{'id': id, 'msg': msg}];
     }
     else {
-      obj.click(function() { return ref.hide_message(obj); });
+      obj.click(function() { return ref.hide_message(obj); })
+        .attr('role', 'alert');
     }
 
     this.triggerEvent('message', { message:msg, type:type, timeout:timeout, object:obj });
@@ -6274,10 +6453,8 @@ function rcube_webmail()
       this.treelist.select(name);
     }
     else if (this.gui_objects.folderlist) {
-      $('li.selected', this.gui_objects.folderlist)
-        .removeClass('selected').addClass('unfocused');
-      $(this.get_folder_li(name, prefix, encode))
-        .removeClass('unfocused').addClass('selected');
+      $('li.selected', this.gui_objects.folderlist).removeClass('selected');
+      $(this.get_folder_li(name, prefix, encode)).addClass('selected');
 
       // trigger event hook
       this.triggerEvent('selectfolder', { folder:name, prefix:prefix });
@@ -6327,7 +6504,7 @@ function rcube_webmail()
         tr = document.createElement('tr');
 
         for (c=0, len=repl.length; c < len; c++) {
-          cell = document.createElement('td');
+          cell = document.createElement('th');
           cell.innerHTML = repl[c].html || '';
           if (repl[c].id) cell.id = repl[c].id;
           if (repl[c].className) cell.className = repl[c].className;
@@ -6511,17 +6688,15 @@ function rcube_webmail()
   };
 
   // create folder selector popup, position and display it
-  this.folder_selector = function(obj, callback)
+  this.folder_selector = function(event, callback)
   {
     var container = this.folder_selector_element;
 
     if (!container) {
       var rows = [],
         delim = this.env.delimiter,
-        ul = $('<ul class="toolbarmenu iconized">'),
-        li = document.createElement('li'),
-        link = document.createElement('a'),
-        span = document.createElement('span');
+        ul = $('<ul class="toolbarmenu">'),
+        link = document.createElement('a');
 
       container = $('<div id="folder-selector" class="popupmenu"></div>');
       link.href = '#';
@@ -6529,33 +6704,30 @@ function rcube_webmail()
 
       // loop over sorted folders list
       $.each(this.env.mailboxes_list, function() {
-        var tmp, n = 0, s = 0,
+        var n = 0, s = 0,
           folder = ref.env.mailboxes[this],
           id = folder.id,
-          a = link.cloneNode(false), row = li.cloneNode(false);
+          a = $(link.cloneNode(false)),
+          row = $('<li>');
 
         if (folder.virtual)
-          a.className += ' virtual';
-        else {
-          a.className += ' active';
-          a.onclick = function() { container.hide().data('callback')(folder.id); };
-        }
+          a.addClass('virtual').attr('aria-disabled', 'true').attr('tabindex', '-1');
+        else
+          a.addClass('active').data('id', folder.id);
 
         if (folder['class'])
-          a.className += ' ' + folder['class'];
+          a.addClass(folder['class']);
 
         // calculate/set indentation level
         while ((s = id.indexOf(delim, s)) >= 0) {
           n++; s++;
         }
-        a.style.paddingLeft =  n ? (n * 16) + 'px' : 0;
+        a.css('padding-left', n ? (n * 16) + 'px' : 0);
 
         // add folder name element
-        tmp = span.cloneNode(false);
-        $(tmp).text(folder.name);
-        a.appendChild(tmp);
+        a.append($('<span>').text(folder.name));
 
-        row.appendChild(a);
+        row.append(a);
         rows.push(row);
       });
 
@@ -6567,23 +6739,157 @@ function rcube_webmail()
 
       // set max-height if the list is long
       if (rows.length > 10)
-        container.css('max-height', $('li', container)[0].offsetHeight * 10 + 9)
+        container.css('max-height', $('li', container)[0].offsetHeight * 10 + 9);
 
-      // hide selector on click out of selector element
-      var fn = function(e) { if (e.target != container.get(0)) container.hide(); };
-      $(document.body).on('mouseup', fn);
-      $('iframe').contents().on('mouseup', fn)
-        .load(function(e) { try { $(this).contents().on('mouseup', fn); } catch(e) {}; });
+      // register delegate event handler for folder item clicks
+      container.on('click', 'a.active', function(e){
+        container.data('callback')($(this).data('id'));
+        return false;
+      });
 
       this.folder_selector_element = container;
     }
 
+    container.data('callback', callback);
+
     // position menu on the screen
-    this.element_position(container, obj);
+    this.show_menu('folder-selector', true, event);
+  };
+
 
-    container.show().data('callback', callback);
+  /***********************************************/
+  /*********    popup menu functions     *********/
+  /***********************************************/
+
+  // Show/hide a specific popup menu
+  this.show_menu = function(prop, show, event)
+  {
+    var name = typeof prop == 'object' ? prop.menu : prop,
+      obj = $('#'+name),
+      ref = event && event.target ? $(event.target) : $(obj.attr('rel') || '#'+name+'link'),
+      keyboard = rcube_event.is_keyboard(event),
+      align = obj.attr('data-align') || '',
+      stack = false;
+
+    // find "real" button element
+    if (ref.get(0).tagName != 'A' && ref.closest('a').length)
+      ref = ref.closest('a');
+
+    if (typeof prop == 'string')
+      prop = { menu:name };
+
+    // let plugins or skins provide the menu element
+    if (!obj.length) {
+      obj = this.triggerEvent('menu-get', { name:name, props:prop, originalEvent:event });
+    }
+
+    if (!obj || !obj.length) {
+      // just delegate the action to subscribers
+      return this.triggerEvent(show === false ? 'menu-close' : 'menu-open', { name:name, props:prop, originalEvent:event });
+    }
+
+    // move element to top for proper absolute positioning
+    obj.appendTo(document.body);
+
+    if (typeof show == 'undefined')
+      show = obj.is(':visible') ? false : true;
+
+    if (show && ref.length) {
+      var win = $(window),
+        pos = ref.offset(),
+        above = align.indexOf('bottom') >= 0;
+
+      stack = ref.attr('role') == 'menuitem' || ref.closest('[role=menuitem]').length > 0;
+
+      ref.offsetWidth = ref.outerWidth();
+      ref.offsetHeight = ref.outerHeight();
+      if (!above && pos.top + ref.offsetHeight + obj.height() > win.height()) {
+        above = true;
+      }
+      if (align.indexOf('right') >= 0) {
+        pos.left = pos.left + ref.outerWidth() - obj.width();
+      }
+      else if (stack) {
+        pos.left = pos.left + ref.offsetWidth - 5;
+        pos.top -= ref.offsetHeight;
+      }
+      if (pos.left + obj.width() > win.width()) {
+        pos.left = win.width() - obj.width() - 12;
+      }
+      pos.top = Math.max(0, pos.top + (above ? -obj.height() : ref.offsetHeight));
+      obj.css({ left:pos.left+'px', top:pos.top+'px' });
+    }
+
+    // add menu to stack
+    if (show) {
+      // truncate stack down to the one containing the ref link
+      for (var i = this.menu_stack.length - 1; stack && i >= 0; i--) {
+        if (!$(ref).parents('#'+this.menu_stack[i]).length)
+          this.hide_menu(this.menu_stack[i]);
+      }
+      if (stack && this.menu_stack.length) {
+        obj.data('parent', $.last(this.menu_stack));
+        obj.css('z-index', ($('#'+$.last(this.menu_stack)).css('z-index') || 0) + 1);
+      }
+      else if (!stack && this.menu_stack.length) {
+        this.hide_menu(this.menu_stack[0], event);
+      }
+
+      obj.show().attr('aria-hidden', 'false').data('opener', ref.attr('aria-expanded', 'true').get(0));
+      this.triggerEvent('menu-open', { name:name, obj:obj, props:prop, originalEvent:event });
+      this.menu_stack.push(name);
+
+      this.menu_keyboard_active = show && keyboard;
+      if (this.menu_keyboard_active) {
+        this.focused_menu = name;
+        obj.find('a,input:not(:disabled)').not('[aria-disabled=true]').first().focus();
+      }
+    }
+    else {  // close menu
+      this.hide_menu(name, event);
+    }
+
+    return show;
   };
 
+  // hide the given popup menu (and it's childs)
+  this.hide_menu = function(name, event)
+  {
+    if (!this.menu_stack.length) {
+      // delegate to subscribers
+      this.triggerEvent('menu-close', { name:name, props:{ menu:name }, originalEvent:event });
+      return;
+    }
+
+    var obj, keyboard = rcube_event.is_keyboard(event);
+    for (var j=this.menu_stack.length-1; j >= 0; j--) {
+      obj = $('#' + this.menu_stack[j]).hide().attr('aria-hidden', 'true').data('parent', false);
+      this.triggerEvent('menu-close', { name:this.menu_stack[j], obj:obj, props:{ menu:this.menu_stack[j] }, originalEvent:event });
+      if (this.menu_stack[j] == name) {
+        j = -1;  // stop loop
+        if (obj.data('opener')) {
+          $(obj.data('opener')).attr('aria-expanded', 'false');
+          if (keyboard)
+            obj.data('opener').focus();
+        }
+      }
+      this.menu_stack.pop();
+    }
+
+    // focus previous menu in stack
+    if (this.menu_stack.length && keyboard) {
+      this.menu_keyboard_active = true;
+      this.focused_menu = $.last(this.menu_stack);
+      if (!obj || !obj.data('opener'))
+        $('#'+this.focused_menu).find('a,input:not(:disabled)').not('[aria-disabled=true]').first().focus();
+    }
+    else {
+      this.focused_menu = null;
+      this.menu_keyboard_active = false;
+    }
+  }
+
+
   // position a menu element on the screen in relation to other object
   this.element_position = function(element, obj)
   {
@@ -6753,6 +7059,13 @@ function rcube_webmail()
     this.start_keepalive();
   };
 
+  // update browser location to remember current view
+  this.update_state = function(query)
+  {
+    if (window.history.replaceState)
+      window.history.replaceState({}, document.title, rcmail.url('', query));
+  };
+
   // send a http request to the server
   this.http_request = function(action, query, lock)
   {
@@ -6938,6 +7251,8 @@ function rcube_webmail()
 
           if ((response.action == 'list' || response.action == 'search') && this.message_list) {
             this.enable_command('set-listmode', this.env.threads && !is_multifolder);
+            if (this.message_list.rowcount > 0)
+              this.message_list.focus();
             this.msglist_select(this.message_list);
             this.triggerEvent('listupdate', { folder:this.env.mailbox, rowcount:this.message_list.rowcount });
           }
@@ -6949,10 +7264,18 @@ function rcube_webmail()
             this.enable_command('search-create', this.env.source == '');
             this.enable_command('search-delete', this.env.search_id);
             this.update_group_commands();
+            if (this.contact_list.rowcount > 0)
+              this.contact_list.focus();
             this.triggerEvent('listupdate', { folder:this.env.source, rowcount:this.contact_list.rowcount });
           }
         }
         break;
+
+      case 'list-contacts':
+      case 'search-contacts':
+        if (this.contact_list && this.contact_list.rowcount > 0)
+          this.contact_list.focus();
+        break;
     }
 
     if (response.unlock)
diff --git a/program/js/common.js b/program/js/common.js
index 48e85558f..5ac4febce 100644
--- a/program/js/common.js
+++ b/program/js/common.js
@@ -281,6 +281,25 @@ cancel: function(evt)
   return false;
 },
 
+/**
+ * Determine whether the given event was trigered from keyboard
+ */
+is_keyboard: function(e)
+{
+  return e && (
+      (e.mozInputSource && e.mozInputSource == e.MOZ_SOURCE_KEYBOARD) ||
+      (!e.pageX && (e.pageY || 0) <= 0 && !e.clientX && (e.clientY || 0) <= 0)
+    );
+},
+
+/**
+ * Accept event if triggered from keyboard action (e.g. <Enter>)
+ */
+keyboard_only: function(e)
+{
+  return rcube_event.is_keyboard(e) ? true : rcube_event.cancel(e);
+},
+
 touchevent: function(e)
 {
   return { pageX:e.pageX, pageY:e.pageY, offsetX:e.pageX - e.target.offsetLeft, offsetY:e.pageY - e.target.offsetTop, target:e.target, istouch:true };
@@ -593,6 +612,11 @@ if (!String.prototype.startsWith) {
   };
 }
 
+// array utility function
+jQuery.last = function(arr) {
+  return arr && arr.length ? arr[arr.length-1] : undefined;
+}
+
 // jQuery plugin to emulate HTML5 placeholder attributes on input elements
 jQuery.fn.placeholder = function(text) {
   return this.each(function() {
diff --git a/program/js/list.js b/program/js/list.js
index 04aec1c99..5492c0ad4 100644
--- a/program/js/list.js
+++ b/program/js/list.js
@@ -51,7 +51,7 @@ function rcube_list_widget(list, p)
   this.rowcount = 0;
   this.colcount = 0;
 
-  this.subject_col = -1;
+  this.subject_col = 0;
   this.modkey = 0;
   this.multiselect = false;
   this.multiexpand = false;
@@ -60,6 +60,7 @@ function rcube_list_widget(list, p)
   this.column_movable = false;
   this.keyboard = false;
   this.toggleselect = false;
+  this.aria_listbox = false;
 
   this.drag_active = false;
   this.col_drag_active = false;
@@ -75,6 +76,9 @@ function rcube_list_widget(list, p)
   if (p && typeof p === 'object')
     for (var n in p)
       this[n] = p[n];
+
+  // register this instance
+  rcube_list_widget._instances.push(this);
 };
 
 
@@ -94,11 +98,17 @@ init: function()
     this.tbody = this.list;
   }
 
+  if ($(this.list).attr('role') == 'listbox') {
+    this.aria_listbox = true;
+    if (this.multiselect)
+      $(this.list).attr('aria-multiselectable', 'true');
+  }
+
   if (this.tbody) {
     this.rows = {};
     this.rowcount = 0;
 
-    var r, len, rows = this.tbody.childNodes;
+    var r, len, rows = this.tbody.childNodes, me = this;
 
     for (r=0, len=rows.length; r<len; r++) {
       this.rowcount += this.init_row(rows[r]) ? 1 : 0;
@@ -108,8 +118,13 @@ init: function()
     this.frame = this.list.parentNode;
 
     // set body events
-    if (this.keyboard)
+    if (this.keyboard) {
       rcube_event.add_listener({event:'keydown', object:this, method:'key_press'});
+
+      // allow the table element to receive focus.
+      $(this.list).attr('tabindex', '0')
+        .on('focus', function(e){ me.focus(e); });
+    }
   }
 
   return this;
@@ -154,6 +169,15 @@ init_row: function(row)
       }, false);
     }
 
+    // label the list row with the subject col as descriptive label
+    if (this.aria_listbox) {
+      var lbl_id = 'l:' + row.id;
+      $(row)
+        .attr('role', 'option')
+        .attr('aria-labelledby', lbl_id)
+        .find(this.col_tagname()).eq(this.subject_col).attr('id', lbl_id);
+    }
+
     if (document.all)
       row.onselectstart = function() { return false; };
 
@@ -175,7 +199,7 @@ init_header: function()
 
     if (this.fixed_header) {  // copy (modified) fixed header back to the actual table
       $(this.list.tHead).replaceWith($(this.fixed_header).find('thead').clone());
-      $(this.list.tHead).find('tr td').attr('style', '');  // remove fixed widths
+      $(this.list.tHead).find('th,td').attr('style', '').find('a').attr('tabindex', '-1');  // remove fixed widths
     }
     else if (!bw.touch && this.list.className.indexOf('fixedheader') >= 0) {
       this.init_fixed_header();
@@ -202,6 +226,7 @@ init_fixed_header: function()
   if (!this.fixed_header) {
     this.fixed_header = $('<table>')
       .attr('class', this.list.className + ' fixedcopy')
+      .attr('role', 'presentation')
       .css({ position:'fixed' })
       .append(clone)
       .append('<tbody></tbody>');
@@ -220,6 +245,12 @@ init_fixed_header: function()
     $(this.fixed_header).find('thead').replaceWith(clone);
   }
 
+  // avoid scrolling header links being focused
+  $(this.list.tHead).find('a.sortcol').attr('tabindex', '-1');
+
+  // set tabindex to fixed header sort links
+  clone.find('a.sortcol').attr('tabindex', '0');
+
   this.thead = clone.get(0);
   this.resize();
 },
@@ -262,6 +293,7 @@ clear: function(sel)
 
   this.rows = {};
   this.rowcount = 0;
+  this.last_selected = 0;
 
   if (sel)
     this.clear_selection();
@@ -370,41 +402,68 @@ update_row: function(id, cols, newid, select)
  */
 focus: function(e)
 {
-  var n, id;
+  if (this.focused)
+    return;
+
   this.focused = true;
 
-  for (n in this.selection) {
-    id = this.selection[n];
-    if (this.rows[id] && this.rows[id].obj) {
-      $(this.rows[id].obj).addClass('selected').removeClass('unfocused');
-    }
+  if (e)
+    rcube_event.cancel(e);
+
+  var focus_elem = null;
+
+  if (this.last_selected && this.rows[this.last_selected]) {
+    focus_elem = $(this.rows[this.last_selected].obj).find(this.col_tagname()).eq(this.subject_col).attr('tabindex', '0');
   }
 
   // Un-focus already focused elements (#1487123, #1487316, #1488600, #1488620)
-  // It looks that window.focus() does the job for all browsers, but not Firefox (#1489058)
-  $('iframe,:focus:not(body)').blur();
-  window.focus();
+  if (focus_elem && focus_elem.length) {
+    // We now fix this by explicitly assigning focus to a dedicated link element
+    this.focus_noscroll(focus_elem);
+  }
+  else {
+    // It looks that window.focus() does the job for all browsers, but not Firefox (#1489058)
+    $('iframe,:focus:not(body)').blur();
+    window.focus();
+  }
 
-  if (e || (e = window.event))
-    rcube_event.cancel(e);
+  $(this.list).addClass('focus').removeAttr('tabindex');
+
+  // set internal focus pointer to first row
+  if (!this.last_selected)
+    this.select_first(CONTROL_KEY);
 },
 
 
 /**
  * remove focus from the list
  */
-blur: function()
+blur: function(e)
 {
-  var n, id;
   this.focused = false;
-  for (n in this.selection) {
-    id = this.selection[n];
-    if (this.rows[id] && this.rows[id].obj) {
-      $(this.rows[id].obj).removeClass('selected focused').addClass('unfocused');
-    }
+
+  // avoid the table getting focus right again
+  var me = this;
+  setTimeout(function(){
+    $(me.list).removeClass('focus').attr('tabindex', '0');
+  }, 20);
+
+  if (this.last_selected && this.rows[this.last_selected]) {
+    $(this.rows[this.last_selected].obj)
+      .find(this.col_tagname()).eq(this.subject_col).removeAttr('tabindex');
   }
 },
 
+/**
+ * Focus the given element without scrolling the list container
+ */
+focus_noscroll: function(elem)
+{
+  var y = this.frame.scrollTop || this.frame.scrollY;
+  elem.focus();
+  this.frame.scrollTop = y;
+},
+
 
 /**
  * Set/unset the given column as hidden
@@ -522,6 +581,8 @@ click_row: function(e, id)
   }
 
   this.rows[id].clicked = now;
+  this.focus();
+
   return false;
 },
 
@@ -794,9 +855,9 @@ get_prev_row: function()
 get_first_row: function()
 {
   if (this.rowcount) {
-    var i, len, uid, rows = this.tbody.childNodes;
+    var i, uid, rows = this.tbody.childNodes;
 
-    for (i=0, len=rows.length-1; i<len; i++)
+    for (i=0; i<rows.length; i++)
       if (rows[i].id && (uid = this.get_row_uid(rows[i])))
         return uid;
   }
@@ -839,9 +900,10 @@ get_cell: function(row, index)
  */
 select_row: function(id, mod_key, with_mouse)
 {
-  var select_before = this.selection.join(',');
+  var select_before = this.selection.join(','),
+    in_selection_before = this.in_selection(id);
 
-  if (!this.multiselect)
+  if (!this.multiselect && with_mouse)
     mod_key = 0;
 
   if (!this.shift_start)
@@ -877,20 +939,26 @@ select_row: function(id, mod_key, with_mouse)
     this.multi_selecting = true;
   }
 
-  // trigger event if selection changed
-  if (this.selection.join(',') != select_before)
-    this.triggerEvent('select');
-
-  if (this.last_selected != 0 && this.rows[this.last_selected])
-    $(this.rows[this.last_selected].obj).removeClass('focused');
+  if (this.last_selected != 0 && this.rows[this.last_selected]) {
+    $(this.rows[this.last_selected].obj).removeClass('focused')
+      .find(this.col_tagname()).eq(this.subject_col).removeAttr('tabindex');
+  }
 
   // unselect if toggleselect is active and the same row was clicked again
-  if (this.toggleselect && this.last_selected == id) {
+  if (this.toggleselect && in_selection_before) {
     this.clear_selection();
-    id = null;
   }
-  else
+  // trigger event if selection changed
+  else if (this.selection.join(',') != select_before) {
+    this.triggerEvent('select');
+  }
+
+  if (this.rows[id]) {
     $(this.rows[id].obj).addClass('focused');
+    // set cursor focus to link inside selected row
+    if (this.focused)
+      this.focus_noscroll($(this.rows[id].obj).find(this.col_tagname()).eq(this.subject_col).attr('tabindex', '0'));
+  }
 
   if (!this.selection.length)
     this.shift_start = null;
@@ -1038,7 +1106,7 @@ select_all: function(filter)
       this.highlight_row(n, true, true);
     }
     else {
-      $(this.rows[n].obj).removeClass('selected').removeClass('unfocused');
+      $(this.rows[n].obj).removeClass('selected').removeAttr('aria-selected');
     }
   }
 
@@ -1095,14 +1163,16 @@ clear_selection: function(id, no_event)
   else {
     for (n in this.selection)
       if (this.rows[this.selection[n]]) {
-        $(this.rows[this.selection[n]].obj).removeClass('selected').removeClass('unfocused');
+        $(this.rows[this.selection[n]].obj).removeClass('selected').removeAttr('aria-selected');
       }
 
     this.selection = [];
   }
 
-  if (num_select && !this.selection.length && !no_event)
+  if (num_select && !this.selection.length && !no_event) {
     this.triggerEvent('select');
+    this.last_selected = 0;
+  }
 },
 
 
@@ -1156,13 +1226,13 @@ highlight_row: function(id, multiple, norecur)
     if (this.selection.length > 1 || !this.in_selection(id)) {
       this.clear_selection(null, true);
       this.selection[0] = id;
-      $(this.rows[id].obj).addClass('selected');
+      $(this.rows[id].obj).addClass('selected').attr('aria-selected', 'true');
     }
   }
   else {
     if (!this.in_selection(id)) { // select row
       this.selection.push(id);
-      $(this.rows[id].obj).addClass('selected');
+      $(this.rows[id].obj).addClass('selected').attr('aria-selected', 'true');
       if (!norecur && !this.rows[id].expanded)
         this.highlight_children(id, true);
     }
@@ -1172,7 +1242,7 @@ highlight_row: function(id, multiple, norecur)
         a_post = this.selection.slice(p+1, this.selection.length);
 
       this.selection = a_pre.concat(a_post);
-      $(this.rows[id].obj).removeClass('selected').removeClass('unfocused');
+      $(this.rows[id].obj).removeClass('selected').removeAttr('aria-selected');
       if (!norecur && !this.rows[id].expanded)
         this.highlight_children(id, false);
     }
@@ -1252,6 +1322,14 @@ key_press: function(e)
 
       return rcube_event.cancel(e);
 
+    case 9: // Tab
+      this.blur();
+      break;
+
+    case 13: // Enter
+      if (!this.selection.length)
+        this.select_row(this.last_selected, mod_key, false);
+
     default:
       this.key_pressed = keyCode;
       this.modkey = mod_key;
@@ -1311,9 +1389,17 @@ use_arrow_key: function(keyCode, mod_key)
   }
 
   if (new_row) {
+    // simulate ctr-key if no rows are selected
+    if (!mod_key && !this.selection.length)
+      mod_key = CONTROL_KEY;
+
     this.select_row(new_row.uid, mod_key, false);
     this.scrollto(new_row.uid);
   }
+  else if (!new_row && !selected_row) {
+    // select the first row if none selected yet
+    this.select_first(CONTROL_KEY);
+  }
 
   return false;
 },
@@ -1708,3 +1794,6 @@ column_replace: function(from, to)
 rcube_list_widget.prototype.addEventListener = rcube_event_engine.prototype.addEventListener;
 rcube_list_widget.prototype.removeEventListener = rcube_event_engine.prototype.removeEventListener;
 rcube_list_widget.prototype.triggerEvent = rcube_event_engine.prototype.triggerEvent;
+
+// static
+rcube_list_widget._instances = [];
diff --git a/program/js/treelist.js b/program/js/treelist.js
index 90eeeeae7..65f5fd4f4 100644
--- a/program/js/treelist.js
+++ b/program/js/treelist.js
@@ -55,6 +55,7 @@ function rcube_treelist_widget(node, p)
     drag_active = false,
     search_active = false,
     last_search = '',
+    has_focus = false,
     box_coords = {},
     item_coords = [],
     autoexpand_timer,
@@ -151,6 +152,19 @@ function rcube_treelist_widget(node, p)
     })
   }
 
+  container.on('focusin', function(e){
+      // TODO: only accept focus on virtual nodes from keyboard events
+      has_focus = true;
+    })
+    .on('focusout', function(e){
+      has_focus = false;
+    });
+
+  container.attr('role', 'tree');
+
+  $(document.body)
+    .bind('keydown', keypress);
+
 
   /////// private methods
 
@@ -201,13 +215,13 @@ function rcube_treelist_widget(node, p)
   function select(id)
   {
     if (selection) {
-      id2dom(selection).removeClass('selected');
+      id2dom(selection).removeClass('selected').removeAttr('aria-selected');
       selection = null;
     }
 
     var li = id2dom(id);
     if (li.length) {
-      li.addClass('selected');
+      li.addClass('selected').attr('aria-selected', 'true');
       selection = id;
       // TODO: expand all parent nodes if collapsed
       scroll_to_node(li);
@@ -262,6 +276,7 @@ function rcube_treelist_widget(node, p)
 
     // insert as child of an existing node
     if (parent_node) {
+      node.level = parent_node.level + 1;
       if (!parent_node.children)
         parent_node.children = [];
 
@@ -296,6 +311,7 @@ function rcube_treelist_widget(node, p)
     }
     // insert at top level
     else {
+      node.level = 0;
       data.push(node);
       li = render_node(node, container);
     }
@@ -392,7 +408,7 @@ function rcube_treelist_widget(node, p)
    */
   function update_data()
   {
-    data = walk_list(container);
+    data = walk_list(container, 0);
   }
 
   /**
@@ -401,6 +417,7 @@ function rcube_treelist_widget(node, p)
   function update_dom(node)
   {
     var li = id2dom(node.id);
+    li.attr('aria-expanded', node.collapsed ? 'false' : 'true');
     li.children('ul').first()[(node.collapsed ? 'hide' : 'show')]();
     li.children('div.treetoggle').removeClass('collapsed expanded').addClass(node.collapsed ? 'collapsed' : 'expanded');
     me.triggerEvent('toggle', node);
@@ -507,6 +524,7 @@ function rcube_treelist_widget(node, p)
 
     // render child nodes
     for (var i=0; i < data.length; i++) {
+      data[i].level = 0;
       render_node(data[i], container);
     }
 
@@ -523,6 +541,7 @@ function rcube_treelist_widget(node, p)
 
     var li = $('<li>')
       .attr('id', p.id_prefix + (p.id_encode ? p.id_encode(node.id) : node.id))
+      .attr('role', 'treeitem')
       .addClass((node.classes || []).join(' '))
       .data('id', node.id);
 
@@ -546,12 +565,14 @@ function rcube_treelist_widget(node, p)
 
     // add child list and toggle icon
     if (node.children && node.children.length) {
+      li.attr('aria-expanded', node.collapsed ? 'false' : 'true');
       $('<div class="treetoggle '+(node.collapsed ? 'collapsed' : 'expanded') + '">&nbsp;</div>').appendTo(li);
-      var ul = $('<ul>').appendTo(li).attr('class', node.childlistclass);
+      var ul = $('<ul>').appendTo(li).attr('class', node.childlistclass).attr('role', 'group');
       if (node.collapsed)
         ul.hide();
 
       for (var i=0; i < node.children.length; i++) {
+        node.children[i].level = node.level + 1;
         render_node(node.children[i], ul);
       }
     }
@@ -563,7 +584,7 @@ function rcube_treelist_widget(node, p)
    * Recursively walk the DOM tree and build an internal data structure
    * representing the skeleton of this tree list.
    */
-  function walk_list(ul)
+  function walk_list(ul, level)
   {
     var result = [];
     ul.children('li').each(function(i,e){
@@ -572,9 +593,10 @@ function rcube_treelist_widget(node, p)
         id: dom2id(li),
         classes: String(li.attr('class')).split(' '),
         virtual: li.hasClass('virtual'),
+        level: level,
         html: li.children().first().get(0).outerHTML,
         text: li.children().first().text(),
-        children: walk_list(sublist)
+        children: walk_list(sublist, level+1)
       }
 
       if (sublist.length) {
@@ -592,15 +614,29 @@ function rcube_treelist_widget(node, p)
 
         if (!li.children('div.treetoggle').length)
           $('<div class="treetoggle '+(node.collapsed ? 'collapsed' : 'expanded') + '">&nbsp;</div>').appendTo(li);
+
+        li.attr('aria-expanded', node.collapsed ? 'false' : 'true');
       }
       if (li.hasClass('selected')) {
+        li.attr('aria-selected', 'true');
         selection = node.id;
       }
 
       li.data('id', node.id);
+
+      // declare list item as treeitem
+      li.attr('role', 'treeitem').attr('aria-level', node.level+1);
+
+      // allow virtual nodes to receive focus
+      if (node.virtual) {
+        li.children('a:first').attr('tabindex', '0');
+      }
+
       result.push(node);
       indexbyid[node.id] = node;
-    })
+    });
+
+    ul.attr('role', level == 0 ? 'tree' : 'group');
 
     return result;
   }
@@ -683,6 +719,70 @@ function rcube_treelist_widget(node, p)
     return undefined;
   }
 
+  /**
+   * Handler for keyboard events on treelist
+   */
+  function keypress(e)
+  {
+    var target = e.target || {},
+      keyCode = rcube_event.get_keycode(e);
+
+    if (!has_focus || target.nodeName == 'INPUT' || target.nodeName == 'TEXTAREA' || target.nodeName == 'SELECT')
+      return true;
+
+    switch (keyCode) {
+      case 38:
+      case 40:
+      case 63232: // 'up', in safari keypress
+      case 63233: // 'down', in safari keypress
+        var li = container.find(':focus').closest('li');
+        if (li.length) {
+          focus_next(li, (mod = keyCode == 38 || keyCode == 63232 ? -1 : 1));
+        }
+        break;
+
+      case 37: // Left arrow key
+      case 39: // Right arrow key
+        var id, node, li = container.find(':focus').closest('li');
+        if (li.length) {
+          id = dom2id(li);
+          node = indexbyid[id];
+          if (node && node.children.length)
+            toggle(id, rcube_event.get_modifier(e) == SHIFT_KEY);  // toggle subtree
+        }
+        return false;
+    }
+
+    return true;
+  }
+
+  function focus_next(li, dir, from_child)
+  {
+    var mod = dir < 0 ? 'prev' : 'next',
+      next = li[mod](), limit, parent;
+
+    if (dir > 0 && !from_child && li.children('ul[role=group]:visible').length) {
+      li.children('ul').children('li:first').children('a:first').focus();
+    }
+    else if (dir < 0 && !from_child && next.children('ul[role=group]:visible').length) {
+      next.children('ul').children('li:last').children('a:last').focus();
+    }
+    else if (next.length && next.children('a:first')) {
+      next.children('a:first').focus();
+    }
+    else {
+      parent = li.parent().closest('li[role=treeitem]');
+      if (parent.length)
+        if (dir < 0) {
+          parent.children('a:first').focus();
+        }
+        else {
+          focus_next(parent, dir, true);
+        }
+    }
+>>>>>>> dev-accessibility
+  }
+
 
   ///// drag & drop support