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// 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.
#ifndef UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_BASE_H_
#define UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_BASE_H_
#include <memory>
#include "base/macros.h"
#include "build/build_config.h"
#include "ui/accessibility/ax_action_data.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/ax_tree_data.h"
#include "ui/accessibility/platform/ax_platform_node.h"
#include "ui/accessibility/platform/ax_platform_node_delegate.h"
#include "ui/accessibility/platform/ax_unique_id.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/views_export.h"
#include "ui/views/widget/widget_observer.h"
namespace views {
class View;
class Widget;
// Shared base class for platforms that require an implementation of
// NativeViewAccessibility to interface with the native accessibility toolkit.
// This class owns the AXPlatformNode, which implements those native APIs.
class VIEWS_EXPORT NativeViewAccessibilityBase
: public ViewAccessibility,
public ui::AXPlatformNodeDelegate {
public:
~NativeViewAccessibilityBase() override;
// ViewAccessibility:
gfx::NativeViewAccessible GetNativeObject() override;
void NotifyAccessibilityEvent(ui::AXEvent event_type) override;
// ui::AXPlatformNodeDelegate
const ui::AXNodeData& GetData() const override;
const ui::AXTreeData& GetTreeData() const override;
int GetChildCount() override;
gfx::NativeViewAccessible ChildAtIndex(int index) override;
gfx::NativeWindow GetTopLevelWidget() override;
gfx::NativeViewAccessible GetParent() override;
gfx::Rect GetScreenBoundsRect() const override;
gfx::NativeViewAccessible HitTestSync(int x, int y) override;
gfx::NativeViewAccessible GetFocus() override;
ui::AXPlatformNode* GetFromNodeID(int32_t id) override;
int GetIndexInParent() const override;
gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override;
bool AccessibilityPerformAction(const ui::AXActionData& data) override;
bool ShouldIgnoreHoveredStateForTesting() override;
bool IsOffscreen() const override;
const ui::AXUniqueId& GetUniqueId()
const override; // Also in ViewAccessibility
std::set<int32_t> GetReverseRelations(ui::AXIntAttribute attr,
int32_t dst_id) override;
std::set<int32_t> GetReverseRelations(ui::AXIntListAttribute attr,
int32_t dst_id) override;
protected:
explicit NativeViewAccessibilityBase(View* view);
protected:
virtual gfx::RectF GetBoundsInScreen() const;
private:
void PopulateChildWidgetVector(std::vector<Widget*>* result_child_widgets);
// We own this, but it is reference-counted on some platforms so we can't use
// a scoped_ptr. It is dereferenced in the destructor.
ui::AXPlatformNode* ax_node_;
mutable ui::AXNodeData data_;
DISALLOW_COPY_AND_ASSIGN(NativeViewAccessibilityBase);
};
} // namespace views
#endif // UI_VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_BASE_H_