Navigate with arrow keys only in treelist widgets; fix keyboard event detection in IE; new text label to help screen readers

program/js/app.js

@@ -1669,6 +1669,9 @@ function rcube_webmail()
     var target = e.target || {},
       keyCode = rcube_event.get_keycode(e);
 
+    // save global reference for keyboard detection on click events in IE
+    rcube_event._last_keyboard_event = e;
+
     if (e.keyCode != 27 && (!this.menu_keyboard_active || target.nodeName == 'TEXTAREA' || target.nodeName == 'SELECT')) {
       return true;
     }

program/js/common.js

@@ -31,7 +31,6 @@ var CONTROL_KEY = 1;
 var SHIFT_KEY = 2;
 var CONTROL_SHIFT_KEY = 3;
 
-
 /**
  * Default browser check class
  * @constructor
@@ -287,8 +286,10 @@ cancel: function(evt)
 is_keyboard: function(e)
 {
   return e && (
-      (e.mozInputSource && e.mozInputSource == e.MOZ_SOURCE_KEYBOARD) ||
+      (e.pointerType !== undefined && e.pointerType !== 'mouse') ||       // IE 11+
-      (!e.pageX && (e.pageY || 0) <= 0 && !e.clientX && (e.clientY || 0) <= 0)
+      (e.mozInputSource && e.mozInputSource == e.MOZ_SOURCE_KEYBOARD) ||  // Firefox
+      (!e.pageX && (e.pageY || 0) <= 0 && !e.clientX && (e.clientY || 0) <= 0) ||  // others
+      (bw.ie && rcube_event._last_keyboard_event && rcube_event._last_keyboard_event.target == e.target)  // hack for IE <= 10
     );
 },
 

program/js/treelist.js

@@ -747,10 +747,16 @@ function rcube_treelist_widget(node, p)
         if (li.length) {
           id = dom2id(li);
           node = indexbyid[id];
-          if (node && node.children.length)
+          if (node && node.children.length && node.collapsed != (keyCode == 37))
             toggle(id, rcube_event.get_modifier(e) == SHIFT_KEY);  // toggle subtree
         }
         return false;
+
+      case 9:  // Tab
+        // jump to last/first item to move focus away from the treelist widget by tab
+        var limit = rcube_event.get_modifier(e) == SHIFT_KEY ? 'first' : 'last';
+        container.find('li[role=treeitem]:has(a)')[limit]().find('a:'+limit).focus();
+        break;
     }
 
     return true;

program/localization/en_US/labels.inc

@@ -586,6 +586,7 @@ $labels['chinese'] = 'Chinese';
 $labels['arialabeltopnav'] = 'Window control';
 $labels['arialabeltasknav'] = 'Application tasks';
 $labels['arialabeltoolbar'] = 'Application toolbar';
+$labels['arialabelactivetask'] = 'Active task';
 $labels['arialabelmessagessearchfilter'] = 'Email listing filter';
 $labels['arialabelmailsearchform'] = 'Email message search form';
 $labels['arialabelcontactsearchform'] = 'Contacts search form';