Re-land: Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node_base.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 UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_
 #define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_
 
 #include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/platform/ax_platform_node.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace ui {
 
+struct AXNodeData;
 class AXPlatformNodeDelegate;
 
 class AXPlatformNodeBase : public AXPlatformNode {
  public:
    virtual void Init(AXPlatformNodeDelegate* delegate);
 
   // These are simple wrappers to our delegate.
-  AXRole GetRole() const;
+  const AXNodeData& GetData() const;
   gfx::Rect GetBoundsInScreen() const;
   gfx::NativeViewAccessible GetParent();
   int GetChildCount();
   gfx::NativeViewAccessible ChildAtIndex(int index);
 
-  // AXPlatformNode
+  // This needs to be implemented for each platform.
+  virtual int GetIndexInParent() = 0;
+
+  // AXPlatformNode.
   void Destroy() override;
   gfx::NativeViewAccessible GetNativeViewAccessible() override;
+  AXPlatformNodeDelegate* GetDelegate() const override;
+
+  // Helpers.
+  AXPlatformNodeBase* GetPreviousSibling();
+  AXPlatformNodeBase* GetNextSibling();
+  bool IsDescendant(AXPlatformNodeBase* descendant);
+
+  bool HasBoolAttribute(ui::AXBoolAttribute attr) const;
+  bool GetBoolAttribute(ui::AXBoolAttribute attr) const;
+  bool GetBoolAttribute(ui::AXBoolAttribute attr, bool* value) const;
+
+  bool HasFloatAttribute(ui::AXFloatAttribute attr) const;
+  float GetFloatAttribute(ui::AXFloatAttribute attr) const;
+  bool GetFloatAttribute(ui::AXFloatAttribute attr, float* value) const;
+
+  bool HasIntAttribute(ui::AXIntAttribute attribute) const;
+  int GetIntAttribute(ui::AXIntAttribute attribute) const;
+  bool GetIntAttribute(ui::AXIntAttribute attribute, int* value) const;
+
+  bool HasStringAttribute(
+      ui::AXStringAttribute attribute) const;
+  const std::string& GetStringAttribute(ui::AXStringAttribute attribute) const;
+  bool GetStringAttribute(ui::AXStringAttribute attribute,
+                          std::string* value) const;
+  bool GetString16Attribute(ui::AXStringAttribute attribute,
+                            base::string16* value) const;
+  base::string16 GetString16Attribute(
+      ui::AXStringAttribute attribute) const;
 
  protected:
   AXPlatformNodeBase();
   ~AXPlatformNodeBase() override;
 
+  // Cast a gfx::NativeViewAccessible to an AXPlatformNodeBase if it is one,
+  // or return NULL if it's not an instance of this class.
+  static AXPlatformNodeBase* FromNativeViewAccessible(
+      gfx::NativeViewAccessible accessible);
+
   AXPlatformNodeDelegate* delegate_;  // Weak. Owns this.
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AXPlatformNodeBase);
 };
 
 }  // namespace ui
 
 #endif  // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_