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/*
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_DRAG_CARET_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_DRAG_CARET_H_
#include <memory>
#include "base/macros.h"
#include "third_party/blink/renderer/core/dom/synchronous_mutation_observer.h"
#include "third_party/blink/renderer/core/editing/caret_display_item_client.h"
#include "third_party/blink/renderer/core/editing/position_with_affinity.h"
#include "third_party/blink/renderer/platform/graphics/paint_invalidation_reason.h"
namespace blink {
class LayoutBlock;
struct PaintInvalidatorContext;
class DragCaret final : public GarbageCollected<DragCaret>,
public SynchronousMutationObserver {
public:
DragCaret();
virtual ~DragCaret();
// Paint invalidation methods delegating to CaretDisplayItemClient.
void LayoutBlockWillBeDestroyed(const LayoutBlock&);
void UpdateStyleAndLayoutIfNeeded();
void InvalidatePaint(const LayoutBlock&, const PaintInvalidatorContext&);
bool ShouldPaintCaret(const LayoutBlock&) const;
void PaintDragCaret(const LocalFrame*,
GraphicsContext&,
const PhysicalOffset&) const;
bool IsContentRichlyEditable() const;
bool HasCaret() const { return position_.IsNotNull(); }
const PositionWithAffinity& CaretPosition() const { return position_; }
void SetCaretPosition(const PositionWithAffinity&);
void Clear() { SetCaretPosition(PositionWithAffinity()); }
void Trace(Visitor*) const override;
private:
// Implementations of |SynchronousMutationObserver|
void NodeChildrenWillBeRemoved(ContainerNode&) final;
void NodeWillBeRemoved(Node&) final;
PositionWithAffinity position_;
const std::unique_ptr<CaretDisplayItemClient> display_item_client_;
DISALLOW_COPY_AND_ASSIGN(DragCaret);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_DRAG_CARET_H_
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