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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.
*/
#ifndef RenderScrollbarPart_h
#define RenderScrollbarPart_h
#include "core/rendering/RenderBlock.h"
#include "platform/scroll/ScrollTypes.h"
namespace WebCore {
class RenderScrollbar;
class RenderScrollbarPart FINAL : public RenderBlock {
public:
static RenderScrollbarPart* createAnonymous(Document*, RenderScrollbar* = 0, ScrollbarPart = NoPart);
virtual ~RenderScrollbarPart();
virtual const char* renderName() const OVERRIDE { return "RenderScrollbarPart"; }
virtual LayerType layerTypeRequired() const OVERRIDE { return NoLayer; }
virtual void layout() OVERRIDE;
void paintIntoRect(GraphicsContext*, const LayoutPoint&, const LayoutRect&);
// Scrollbar parts needs to be rendered at device pixel boundaries.
virtual LayoutUnit marginTop() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.top())); return m_marginBox.top(); }
virtual LayoutUnit marginBottom() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.bottom())); return m_marginBox.bottom(); }
virtual LayoutUnit marginLeft() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.left())); return m_marginBox.left(); }
virtual LayoutUnit marginRight() const OVERRIDE { ASSERT(isIntegerValue(m_marginBox.right())); return m_marginBox.right(); }
virtual bool isRenderScrollbarPart() const OVERRIDE { return true; }
RenderObject* rendererOwningScrollbar() const;
protected:
virtual void styleWillChange(StyleDifference, const RenderStyle& newStyle) OVERRIDE;
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) OVERRIDE;
private:
RenderScrollbarPart(RenderScrollbar*, ScrollbarPart);
virtual void computePreferredLogicalWidths() OVERRIDE;
// Have all padding getters return 0. The important point here is to avoid resolving percents
// against the containing block, since scroll bar corners don't always have one (so it would
// crash). Scroll bar corners are not actually laid out, and they don't have child content, so
// what we return here doesn't really matter.
virtual LayoutUnit paddingTop() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingBottom() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingLeft() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingRight() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingBefore() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingAfter() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingStart() const OVERRIDE { return LayoutUnit(); }
virtual LayoutUnit paddingEnd() const OVERRIDE { return LayoutUnit(); }
void layoutHorizontalPart();
void layoutVerticalPart();
void computeScrollbarWidth();
void computeScrollbarHeight();
RenderScrollbar* m_scrollbar;
ScrollbarPart m_part;
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderScrollbarPart, isRenderScrollbarPart());
} // namespace WebCore
#endif // RenderScrollbarPart_h
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