78 lines
3.1 KiB
C++
78 lines
3.1 KiB
C++
/*
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* Copyright (C) 2008 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 "RenderBlock.h"
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#include "ScrollTypes.h"
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namespace WebCore {
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class RenderScrollbar;
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class RenderScrollbarPart final : public RenderBlock {
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WTF_MAKE_ISO_ALLOCATED(RenderScrollbarPart);
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public:
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RenderScrollbarPart(Document&, RenderStyle&&, RenderScrollbar* = nullptr, ScrollbarPart = NoPart);
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virtual ~RenderScrollbarPart();
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const char* renderName() const override { return "RenderScrollbarPart"; }
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bool requiresLayer() const override { return false; }
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void layout() override;
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void paintIntoRect(GraphicsContext&, const LayoutPoint&, const LayoutRect&);
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// Scrollbar parts needs to be rendered at device pixel boundaries.
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LayoutUnit marginTop() const override { ASSERT(isIntegerValue(m_marginBox.top())); return m_marginBox.top(); }
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LayoutUnit marginBottom() const override { ASSERT(isIntegerValue(m_marginBox.bottom())); return m_marginBox.bottom(); }
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LayoutUnit marginLeft() const override { ASSERT(isIntegerValue(m_marginBox.left())); return m_marginBox.left(); }
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LayoutUnit marginRight() const override { ASSERT(isIntegerValue(m_marginBox.right())); return m_marginBox.right(); }
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RenderBox* rendererOwningScrollbar() const;
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private:
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void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
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void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override;
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bool isRenderScrollbarPart() const override { return true; }
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void computePreferredLogicalWidths() override;
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void layoutHorizontalPart();
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void layoutVerticalPart();
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void computeScrollbarWidth();
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void computeScrollbarHeight();
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RenderScrollbar* m_scrollbar;
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ScrollbarPart m_part;
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};
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderScrollbarPart, isRenderScrollbarPart())
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