Reland of Exposed the children of elements with role textbox in order to make rich text information available…

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 433 matching lines @@
 
   // Adjust the bounds by the top left corner of the containing view's bounds
   // in screen coordinates.
   bounds.Offset(manager_->GetViewBounds().OffsetFromOrigin());
 
   return bounds;
 }
 
 base::string16 BrowserAccessibility::GetValue() const {
   base::string16 value = GetString16Attribute(ui::AX_ATTR_VALUE);
-  if (value.empty() && IsSimpleTextControl())
+  // Some screen readers like Jaws and older versions of VoiceOver require a
+  // value to be set in text fields with rich content, even though the same
+  // information is available on the children.
+  if (value.empty() && (IsSimpleTextControl() || IsRichTextControl()))
     value = GetInnerText();
   return value;
 }
 
 int BrowserAccessibility::GetWordStartBoundary(
     int start, ui::TextBoundaryDirection direction) const {
   DCHECK_GE(start, -1);
   // Special offset that indicates that a word boundary has not been found.
   int word_start_not_found = static_cast<int>(GetText().size());
   int word_start = word_start_not_found;
@@ skipping 357 matching lines @@
   return (GetState() >> state_enum) & 1;
 }
 
 bool BrowserAccessibility::IsCellOrTableHeaderRole() const {
   return (GetRole() == ui::AX_ROLE_CELL ||
           GetRole() == ui::AX_ROLE_COLUMN_HEADER ||
           GetRole() == ui::AX_ROLE_ROW_HEADER);
 }
 
 bool BrowserAccessibility::HasCaret() const {
-  if (HasState(ui::AX_STATE_EDITABLE) &&
-      !HasState(ui::AX_STATE_RICHLY_EDITABLE) &&
-      HasIntAttribute(ui::AX_ATTR_TEXT_SEL_START) &&
+  if (IsSimpleTextControl() && HasIntAttribute(ui::AX_ATTR_TEXT_SEL_START) &&
       HasIntAttribute(ui::AX_ATTR_TEXT_SEL_END)) {
     return true;
   }
 
   // The caret is always at the focus of the selection.
   int32_t focus_id = manager()->GetTreeData().sel_focus_object_id;
   BrowserAccessibility* focus_object = manager()->GetFromID(focus_id);
   if (!focus_object)
     return false;
 
@@ skipping 87 matching lines @@
       return false;
   }
 }
 
 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 true;
+      return !HasState(ui::AX_STATE_RICHLY_EDITABLE);
     default:
       return false;
   }
 }
 
 // Indicates if this object is at the root of a rich edit text control.
 bool BrowserAccessibility::IsRichTextControl() const {
   return HasState(ui::AX_STATE_RICHLY_EDITABLE) &&
          (!GetParent() || !GetParent()->HasState(ui::AX_STATE_RICHLY_EDITABLE));
 }
@@ skipping 90 matching lines @@
       }
       need_to_offset_web_area = true;
     }
     parent = parent->GetParent();
   }
 
   return bounds;
 }
 
 }  // namespace content