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/*
* Copyright (C) 2008, 2009, 2015 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 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 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.
*/
#pragma once
#include "RenderPtr.h"
#include "RenderStyleConstants.h"
#include "Scrollbar.h"
#include <wtf/HashMap.h>
namespace WebCore {
class Element;
class LocalFrame;
class RenderBox;
class RenderScrollbarPart;
class RenderStyle;
class RenderScrollbar final : public Scrollbar {
public:
friend class Scrollbar;
static Ref<Scrollbar> createCustomScrollbar(ScrollableArea&, ScrollbarOrientation, Element*, LocalFrame* owningFrame = nullptr);
virtual ~RenderScrollbar();
RenderBox* owningRenderer() const;
void paintPart(GraphicsContext&, ScrollbarPart, const IntRect&);
IntRect buttonRect(ScrollbarPart) const;
IntRect trackRect(int startLength, int endLength) const;
IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&) const;
int minimumThumbLength() const;
float opacity() const;
bool isHiddenByStyle() const override;
std::unique_ptr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId) const;
private:
RenderScrollbar(ScrollableArea&, ScrollbarOrientation, Element*, LocalFrame*);
bool isOverlayScrollbar() const override { return false; }
void setParent(ScrollView*) override;
void setEnabled(bool) override;
void paint(GraphicsContext&, const IntRect& damageRect, Widget::SecurityOriginPaintPolicy, RegionContext*) override;
void setHoveredPart(ScrollbarPart) override;
void setPressedPart(ScrollbarPart) override;
void styleChanged() override;
void updateScrollbarParts();
void updateScrollbarPart(ScrollbarPart);
// This Scrollbar(Widget) may outlive the DOM which created it (during tear down),
// so we keep a reference to the Element which caused this custom scrollbar creation.
// This will not create a reference cycle as the Widget tree is owned by our containing
// FrameView which this Element pointer can in no way keep alive. See webkit bug 80610.
RefPtr<Element> m_ownerElement;
WeakPtr<LocalFrame> m_owningFrame;
UncheckedKeyHashMap<unsigned, RenderPtr<RenderScrollbarPart>> m_parts;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::RenderScrollbar)
static bool isType(const WebCore::Scrollbar& scrollbar) { return scrollbar.isCustomScrollbar(); }
SPECIALIZE_TYPE_TRAITS_END()
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