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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2006 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_LAYOUT_SELECTION_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_LAYOUT_SELECTION_H_
#include "third_party/blink/renderer/core/editing/forward.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
namespace gfx {
class Rect;
}
namespace blink {
class FrameSelection;
class InlineCursor;
class InlineCursorPosition;
class LayoutObject;
class LayoutText;
class SelectionPaintRange;
enum class SelectionState;
struct LayoutSelectionStatus;
struct LayoutTextSelectionStatus;
struct TextOffsetRange;
class LayoutSelection final : public GarbageCollected<LayoutSelection> {
public:
explicit LayoutSelection(FrameSelection&);
void SetHasPendingSelection();
void Commit();
gfx::Rect AbsoluteSelectionBounds();
void InvalidateStyleAndPaintForSelection();
LayoutTextSelectionStatus ComputeSelectionStatus(const LayoutText&) const;
LayoutSelectionStatus ComputeSelectionStatus(const InlineCursor&) const;
// Compute the layout selection state relative to the current item of the
// given InlineCursor. E.g. a state of kStart means that the selection
// starts within the position (and ends elsewhere), where kStartAndEnd means
// the selection both starts and ends within the position. This information is
// used at paint time to determine the edges of the layout selection.
SelectionState ComputePaintingSelectionStateForCursor(
const InlineCursorPosition&) const;
static bool IsSelected(const LayoutObject&);
void ContextDestroyed();
void Trace(Visitor*) const;
private:
LayoutSelectionStatus ComputeSelectionStatus(const InlineCursor&,
const TextOffsetRange&) const;
SelectionState ComputeSelectionStateFromOffsets(SelectionState state,
unsigned start_offset,
unsigned end_offset) const;
void AssertIsValid() const;
Member<FrameSelection> frame_selection_;
bool has_pending_selection_ : 1;
Member<SelectionPaintRange> paint_range_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_LAYOUT_SELECTION_H_
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