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