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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ScrollableLayerAndroid_h
#define ScrollableLayerAndroid_h
#if USE(ACCELERATED_COMPOSITING)
#include "LayerAndroid.h"
namespace WebCore {
class ScrollableLayerAndroid : public LayerAndroid {
public:
ScrollableLayerAndroid(RenderLayer* owner)
: LayerAndroid(owner) {}
ScrollableLayerAndroid(const ScrollableLayerAndroid& layer)
: LayerAndroid(layer)
, m_scrollLimits(layer.m_scrollLimits) {}
ScrollableLayerAndroid(const LayerAndroid& layer)
: LayerAndroid(layer)
{
m_scrollLimits.setEmpty();
}
virtual ~ScrollableLayerAndroid() {};
virtual bool contentIsScrollable() const { return true; }
virtual LayerAndroid* copy() const { return new ScrollableLayerAndroid(*this); }
// Returns true if the content position has changed.
bool scrollTo(int dx, int dy);
// Fills the rect with the current scroll offset and the maximum scroll.
// fLeft = scrollX
// fTop = scrollY
// fRight = maxX
// fBottom = maxY
void getScrollRect(SkIRect* out) const;
void setScrollLimits(float x, float y, float width, float height)
{
m_scrollLimits.set(x, y, x + width, y + height);
}
friend void android::serializeLayer(LayerAndroid* layer, SkWStream* stream);
friend LayerAndroid* android::deserializeLayer(SkStream* stream);
private:
SkRect m_scrollLimits;
};
}
#endif // USE(ACCELERATED_COMPOSITING)
#endif // LayerAndroid_h
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