97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
/*
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* Copyright (C) 2008, 2009, 2015 Apple Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "RenderPtr.h"
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#include "RenderStyleConstants.h"
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#include "Scrollbar.h"
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#include <wtf/HashMap.h>
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namespace WebCore {
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class Frame;
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class Element;
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class RenderBox;
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class RenderScrollbarPart;
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class RenderStyle;
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class RenderScrollbar final : public Scrollbar {
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public:
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friend class Scrollbar;
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static Ref<Scrollbar> createCustomScrollbar(ScrollableArea&, ScrollbarOrientation, Element*, Frame* owningFrame = nullptr);
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virtual ~RenderScrollbar();
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RenderBox* owningRenderer() const;
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void paintPart(GraphicsContext&, ScrollbarPart, const IntRect&);
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IntRect buttonRect(ScrollbarPart) const;
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IntRect trackRect(int startLength, int endLength) const;
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IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&) const;
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int minimumThumbLength() const;
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float opacity() const;
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bool isHiddenByStyle() const final;
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std::unique_ptr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId) const;
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private:
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RenderScrollbar(ScrollableArea&, ScrollbarOrientation, Element*, Frame*);
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bool isOverlayScrollbar() const override { return false; }
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void setParent(ScrollView*) override;
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void setEnabled(bool) override;
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void paint(GraphicsContext&, const IntRect& damageRect, Widget::SecurityOriginPaintPolicy, EventRegionContext*) override;
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void setHoveredPart(ScrollbarPart) override;
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void setPressedPart(ScrollbarPart) override;
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void styleChanged() override;
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void updateScrollbarParts();
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void updateScrollbarPart(ScrollbarPart);
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// This Scrollbar(Widget) may outlive the DOM which created it (during tear down),
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// so we keep a reference to the Element which caused this custom scrollbar creation.
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// This will not create a reference cycle as the Widget tree is owned by our containing
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// FrameView which this Element pointer can in no way keep alive. See webkit bug 80610.
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RefPtr<Element> m_ownerElement;
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WeakPtr<Frame> m_owningFrame;
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HashMap<unsigned, RenderPtr<RenderScrollbarPart>> m_parts;
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};
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::RenderScrollbar)
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static bool isType(const WebCore::Scrollbar& scrollbar) { return scrollbar.isCustomScrollbar(); }
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SPECIALIZE_TYPE_TRAITS_END()
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