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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 Caret_h
#define Caret_h
#include "core/editing/VisiblePosition.h"
#include "platform/geometry/IntRect.h"
#include "platform/geometry/LayoutRect.h"
#include "wtf/Noncopyable.h"
namespace WebCore {
class Frame;
class GraphicsContext;
class RenderObject;
class RenderView;
class CaretBase {
WTF_MAKE_NONCOPYABLE(CaretBase);
WTF_MAKE_FAST_ALLOCATED;
protected:
enum CaretVisibility { Visible, Hidden };
explicit CaretBase(CaretVisibility = Hidden);
void invalidateCaretRect(Node*, bool caretRectChanged = false);
void clearCaretRect();
bool updateCaretRect(Document*, const VisiblePosition& caretPosition);
IntRect absoluteBoundsForLocalRect(Node*, const LayoutRect&) const;
bool shouldRepaintCaret(const RenderView*, bool isContentEditable) const;
void paintCaret(Node*, GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect) const;
const LayoutRect& localCaretRectWithoutUpdate() const { return m_caretLocalRect; }
bool shouldUpdateCaretRect() const { return m_caretRectNeedsUpdate; }
void setCaretRectNeedsUpdate() { m_caretRectNeedsUpdate = true; }
void setCaretVisibility(CaretVisibility visibility) { m_caretVisibility = visibility; }
bool caretIsVisible() const { return m_caretVisibility == Visible; }
CaretVisibility caretVisibility() const { return m_caretVisibility; }
protected:
static RenderObject* caretRenderer(Node*);
static void repaintCaretForLocalRect(Node*, const LayoutRect&);
private:
LayoutRect m_caretLocalRect; // caret rect in coords local to the renderer responsible for painting the caret
bool m_caretRectNeedsUpdate; // true if m_caretRect (and m_absCaretBounds in FrameSelection) need to be calculated
CaretVisibility m_caretVisibility;
};
class DragCaretController : private CaretBase {
WTF_MAKE_NONCOPYABLE(DragCaretController);
WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<DragCaretController> create();
RenderObject* caretRenderer() const;
void paintDragCaret(Frame*, GraphicsContext*, const LayoutPoint&, const LayoutRect& clipRect) const;
bool isContentEditable() const { return m_position.rootEditableElement(); }
bool isContentRichlyEditable() const;
bool hasCaret() const { return m_position.isNotNull(); }
const VisiblePosition& caretPosition() { return m_position; }
void setCaretPosition(const VisiblePosition&);
void clear() { setCaretPosition(VisiblePosition()); }
void nodeWillBeRemoved(Node&);
private:
DragCaretController();
VisiblePosition m_position;
};
} // namespace WebCore
#endif // Caret_h
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