Add vox support for reading unnamed folder description and fix a focus bug when app launcher is ope…

ui/app_list/views/folder_header_view.cc

 // Copyright (c) 2013 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 "ui/app_list/views/folder_header_view.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_resources.h"
 #include "grit/ui_strings.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 99 matching lines @@
   folder_item_ = NULL;
 }
 
 void FolderHeaderView::Update() {
   if (!folder_item_)
     return;
 
   folder_name_view_->SetVisible(folder_name_visible_);
   if (folder_name_visible_) {
     folder_name_view_->SetText(base::UTF8ToUTF16(folder_item_->name()));
+    UpdateFolderNameAccessibleName();
   }
 
   Layout();
 }
 
+void FolderHeaderView::UpdateFolderNameAccessibleName() {
+  base::string16 access_name = folder_name_view_->text().empty()
+                                   ? folder_name_placeholder_text_
+                                   : base::string16();

[xiyuan, 2014/04/28 21:43:27]

Why use empty string when folder_name_view_->text().empty()?

[jennyz, 2014/04/28 22:23:01]

Added a comment to explain.

+  folder_name_view_->SetAccessibleName(access_name);
+}
+
 const base::string16& FolderHeaderView::GetFolderNameForTest() {
   return folder_name_view_->text();
 }
 
 void FolderHeaderView::SetFolderNameForTest(const base::string16& name) {
   folder_name_view_->SetText(name);
 }
 
 bool FolderHeaderView::IsFolderNameEnabledForTest() const {
   return folder_name_view_->enabled();
@@ skipping 56 matching lines @@
     return;
 
   folder_item_->RemoveObserver(this);
   // Enforce the maximum folder name length in UI.
   std::string name = base::UTF16ToUTF8(
       folder_name_view_->text().substr(0, kMaxFolderNameChars));
   if (name != folder_item_->name())
     delegate_->SetItemName(folder_item_, name);
   folder_item_->AddObserver(this);
 
+  UpdateFolderNameAccessibleName();
+
   Layout();
 }
 
 void FolderHeaderView::ButtonPressed(views::Button* sender,
                                      const ui::Event& event) {
   delegate_->NavigateBack(folder_item_, event);
 }
 
 void FolderHeaderView::ItemIconChanged() {
 }
 
 void FolderHeaderView::ItemNameChanged() {
   Update();
 }
 
 void FolderHeaderView::ItemHighlightedChanged() {
 }
 
 void FolderHeaderView::ItemIsInstallingChanged() {
 }
 
 void FolderHeaderView::ItemPercentDownloadedChanged() {
 }
 
 }  // namespace app_list