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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_LAYERS_SOLID_COLOR_SCROLLBAR_LAYER_H_
#define CC_LAYERS_SOLID_COLOR_SCROLLBAR_LAYER_H_
#include <memory>
#include "cc/cc_export.h"
#include "cc/layers/layer.h"
#include "cc/layers/scrollbar_layer_base.h"
namespace cc {
// A solid color scrollbar that can be fully drawn on the impl thread. In
// practice, this is used for overlay scrollbars on Android.
class CC_EXPORT SolidColorScrollbarLayer : public ScrollbarLayerBase {
public:
std::unique_ptr<LayerImpl> CreateLayerImpl(
LayerTreeImpl* tree_impl) const override;
static scoped_refptr<SolidColorScrollbarLayer> CreateOrReuse(
scoped_refptr<Scrollbar>,
SolidColorScrollbarLayer* existing_layer);
static scoped_refptr<SolidColorScrollbarLayer> Create(
ScrollbarOrientation orientation,
int thumb_thickness,
int track_start,
bool is_left_side_vertical_scrollbar);
SolidColorScrollbarLayer(const SolidColorScrollbarLayer&) = delete;
SolidColorScrollbarLayer& operator=(const SolidColorScrollbarLayer&) = delete;
// Layer overrides.
bool OpacityCanAnimateOnImplThread() const override;
void SetOpacity(float opacity) override;
void SetNeedsDisplayRect(const gfx::Rect& rect) override;
void SetLayerTreeHost(LayerTreeHost* host) override;
int thumb_thickness() const { return thumb_thickness_; }
int track_start() const { return track_start_; }
void SetColor(SkColor4f color);
SkColor4f color() const { return color_.Read(*this); }
ScrollbarLayerType GetScrollbarLayerType() const override;
protected:
void PushDirtyPropertiesTo(
LayerImpl* layer,
uint8_t dirty_flag,
const CommitState& commit_state,
const ThreadUnsafeCommitState& unsafe_state) override;
private:
SolidColorScrollbarLayer(ScrollbarOrientation orientation,
int thumb_thickness,
int track_start,
bool is_left_side_vertical_scrollbar);
~SolidColorScrollbarLayer() override;
int thumb_thickness_;
int track_start_;
ProtectedSequenceReadable<SkColor4f> color_;
};
} // namespace cc
#endif // CC_LAYERS_SOLID_COLOR_SCROLLBAR_LAYER_H_
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