third_party/WebKit/Source/core/paint/ScrollbarPainter.cpp

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "core/paint/ScrollbarPainter.h"

#include "core/layout/LayoutScrollbar.h"
#include "core/layout/LayoutScrollbarPart.h"
#include "core/paint/ObjectPainter.h"
#include "core/paint/PaintInfo.h"
#include "platform/graphics/GraphicsContext.h"

namespace blink {

void ScrollbarPainter::paintPart(GraphicsContext& graphicsContext, ScrollbarPart partType, const IntRect& rect)
{
    const LayoutScrollbarPart* partLayoutObject = m_layoutScrollbar->getPart(partType);
    if (!partLayoutObject)
        return;
    paintIntoRect(*partLayoutObject, graphicsContext, m_layoutScrollbar->location(), LayoutRect(rect));
}

void ScrollbarPainter::paintIntoRect(const LayoutScrollbarPart& layoutScrollbarPart, GraphicsContext& graphicsContext, const LayoutPoint& paintOffset, const LayoutRect& rect)
{
    // Make sure our dimensions match the rect.
    // FIXME: Setting these is a bad layering violation!
    const_cast<LayoutScrollbarPart&>(layoutScrollbarPart).setLocation(rect.location() - toSize(paintOffset));
    const_cast<LayoutScrollbarPart&>(layoutScrollbarPart).setWidth(rect.width());
    const_cast<LayoutScrollbarPart&>(layoutScrollbarPart).setHeight(rect.height());

    PaintInfo paintInfo(graphicsContext, pixelSnappedIntRect(rect), PaintPhaseForeground, GlobalPaintNormalPhase, PaintLayerNoFlag);
    ObjectPainter(layoutScrollbarPart).paintAllPhasesAtomically(paintInfo, paintOffset);
}

} // namespace blink