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// Copyright 2017 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_SYSTEM_CARET_WIN_H_
#define UI_ACCESSIBILITY_PLATFORM_AX_SYSTEM_CARET_WIN_H_
#include <oleacc.h>
#include <wrl/client.h>
#include "base/macros.h"
#include "ui/accessibility/ax_export.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/ax_tree_data.h"
#include "ui/accessibility/platform/ax_platform_node_delegate_base.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/native_widget_types.h"
namespace ui {
class AXPlatformNodeWin;
// A class representing the position of the caret to assistive software on
// Windows. This is required because Chrome doesn't use the standard system
// caret and because some assistive software still relies on specific
// accessibility APIs to retrieve the caret position.
class AX_EXPORT AXSystemCaretWin : private AXPlatformNodeDelegateBase {
public:
explicit AXSystemCaretWin(gfx::AcceleratedWidget event_target);
~AXSystemCaretWin() override;
Microsoft::WRL::ComPtr<IAccessible> GetCaret() const;
void MoveCaretTo(const gfx::Rect& bounds);
void Hide();
private:
// |AXPlatformNodeDelegate| members.
const AXNodeData& GetData() const override;
gfx::NativeViewAccessible GetParent() override;
gfx::Rect GetBoundsRect(const AXCoordinateSystem coordinate_system,
const AXClippingBehavior clipping_behavior,
AXOffscreenResult* offscreen_result) const override;
gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override;
bool ShouldIgnoreHoveredStateForTesting() override;
const ui::AXUniqueId& GetUniqueId() const override;
AXPlatformNodeWin* caret_;
gfx::AcceleratedWidget event_target_;
AXNodeData data_;
ui::AXUniqueId unique_id_;
friend class AXPlatformNodeWin;
DISALLOW_COPY_AND_ASSIGN(AXSystemCaretWin);
};
} // namespace ui
#endif // UI_ACCESSIBILITY_PLATFORM_AX_SYSTEM_CARET_WIN_H_