The children of non-editable combo boxes, search boxes and text fields should not be hidden

content/browser/accessibility/browser_accessibility.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/accessibility/browser_accessibility.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 52 matching lines @@
 }
 
 bool BrowserAccessibility::PlatformIsLeaf() const {
   if (InternalChildCount() == 0)
     return true;
 
   // These types of objects may have children that we use as internal
   // implementation details, but we want to expose them as leaves to platform
   // accessibility APIs because screen readers might be confused if they find
   // any children.
-  if (IsSimpleTextControl() || IsTextOnlyObject())
+  // Note that if a combo box, search box or text field are not native, they
+  // might present a menu of choices using aria-owns which should not be hidden
+  // from tree.
+  if (IsNativeTextControl() || IsTextOnlyObject())
     return true;
 
   // Roles whose children are only presentational according to the ARIA and
   // HTML5 Specs should be hidden from screen readers.
   // (Note that whilst ARIA buttons can have only presentational children, HTML5
   // buttons are allowed to have content.)
   switch (GetRole()) {
     case ui::AX_ROLE_IMAGE:
     case ui::AX_ROLE_MATH:
     case ui::AX_ROLE_METER:
@@ skipping 973 matching lines @@
     case ui::AX_ROLE_MENU_ITEM_CHECK_BOX:
     case ui::AX_ROLE_MENU_ITEM_RADIO:
     case ui::AX_ROLE_MENU_LIST_OPTION:
     case ui::AX_ROLE_MENU_LIST_POPUP:
       return true;
     default:
       return false;
   }
 }
 
+bool BrowserAccessibility::IsNativeTextControl() const {
+  const std::string& html_tag = GetStringAttribute(ui::AX_ATTR_HTML_TAG);
+  if (html_tag == "input") {
+    std::string input_type;
+    if (!GetHtmlAttribute("type", &input_type))
+      return true;
+    return input_type.empty() || input_type == "email" ||
+           input_type == "password" || input_type == "search" ||
+           input_type == "tel" || input_type == "text" || input_type == "url" ||
+           input_type == "number";
+  }
+  return html_tag == "textarea";
+}
+
 bool BrowserAccessibility::IsSimpleTextControl() const {
   // Time fields, color wells and spinner buttons might also use text fields as
   // constituent parts, but they are not considered text fields as a whole.
   switch (GetRole()) {
     case ui::AX_ROLE_COMBO_BOX:
     case ui::AX_ROLE_SEARCH_BOX:
       return true;
     case ui::AX_ROLE_TEXT_FIELD:
       return !HasState(ui::AX_STATE_RICHLY_EDITABLE);
     default:
@@ skipping 109 matching lines @@
       break;
 
     manager = root->GetParent()->manager();
     root = manager->GetRoot();
   }
 
   return bounds;
 }
 
 }  // namespace content