third_party/WebKit/Source/platform/graphics/paint/ScrollDisplayItem.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 "platform/graphics/paint/ScrollDisplayItem.h"

#include "platform/graphics/GraphicsContext.h"
#include "platform/transforms/AffineTransform.h"
#include "public/platform/WebDisplayItemList.h"

namespace blink {

void BeginScrollDisplayItem::replay(GraphicsContext& context) const
{
    context.save();
    context.translate(-m_currentOffset.width(), -m_currentOffset.height());
}

void BeginScrollDisplayItem::appendToWebDisplayItemList(const IntRect& visualRect, WebDisplayItemList* list) const
{
    WebDisplayItemList::ScrollContainerId scrollContainerId = &client();
    list->appendScrollItem(visualRect, m_currentOffset, scrollContainerId);
}

#ifndef NDEBUG
void BeginScrollDisplayItem::dumpPropertiesAsDebugString(WTF::StringBuilder& stringBuilder) const
{
    PairedBeginDisplayItem::dumpPropertiesAsDebugString(stringBuilder);
    stringBuilder.append(WTF::String::format(", currentOffset: [%d,%d]", m_currentOffset.width(), m_currentOffset.height()));
}
#endif

void EndScrollDisplayItem::replay(GraphicsContext& context) const
{
    context.restore();
}

void EndScrollDisplayItem::appendToWebDisplayItemList(const IntRect& visualRect, WebDisplayItemList* list) const
{
    list->appendEndScrollItem(visualRect);
}

} // namespace blink