Extend AXTreeSourceViews to handle aura::Window and views::Widget.

chrome/browser/ui/views/accessibility/ax_tree_source_views.h

+// Copyright 2014 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_ACCESSIBILITY_AX_TREE_SOURCE_VIEWS_H_
+#define CHROME_BROWSER_UI_VIEWS_ACCESSIBILITY_AX_TREE_SOURCE_VIEWS_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/ui/views/accessibility/ax_root_obj_wrapper.h"
+#include "ui/accessibility/ax_tree_source.h"
+#include "ui/views/views_export.h"
+
+namespace views {
+class AXAuraObjWrapper;
+
+// This class exposes the views hierarchy as an accessibility tree permitting
+// use with other accessibility classes.
+class VIEWS_EXPORT AXTreeSourceViews
+    : public ui::AXTreeSource<AXAuraObjWrapper*> {
+ public:
+  AXTreeSourceViews();
+  virtual ~AXTreeSourceViews();
+
+  // AXTreeSource implementation.
+  virtual AXAuraObjWrapper* GetRoot() const OVERRIDE;
+  virtual AXAuraObjWrapper* GetFromId(int32 id) const OVERRIDE;
+  virtual int32 GetId(AXAuraObjWrapper* node) const OVERRIDE;
+  virtual void GetChildren(AXAuraObjWrapper* node,
+      std::vector<AXAuraObjWrapper*>* out_children) const OVERRIDE;
+  virtual AXAuraObjWrapper* GetParent(AXAuraObjWrapper* node) const OVERRIDE;
+  virtual bool IsValid(AXAuraObjWrapper* node) const OVERRIDE;
+  virtual bool IsEqual(AXAuraObjWrapper* node1,
+                       AXAuraObjWrapper* node2) const OVERRIDE;
+  virtual AXAuraObjWrapper* GetNull() const OVERRIDE;
+  virtual void SerializeNode(
+      AXAuraObjWrapper* node, ui::AXNodeData* out_data) const OVERRIDE;
+
+  // Useful for debugging.
+  std::string ToString(AXAuraObjWrapper* root, std::string prefix);
+
+ private:
+  scoped_ptr<views::AXRootObjWrapper> root_;
+};
+
+} // namespace views
+
+#endif  // CHROME_BROWSER_UI_VIEWS_ACCESSIBILITY_AX_TREE_SOURCE_VIEWS_H_