Part 10 of cc/ directory shuffles: layers

cc/scrollbar_layer.h

-// Copyright 2012 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.
-
-#ifndef CC_SCROLLBAR_LAYER_H_
-#define CC_SCROLLBAR_LAYER_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/contents_scaling_layer.h"
-#include "cc/resources/layer_updater.h"
-#include "cc/scrollbar_theme_painter.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebScrollbar.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebScrollbarThemeGeometry.h"
-
-namespace cc {
-class CachingBitmapContentLayerUpdater;
-class ResourceUpdateQueue;
-class Scrollbar;
-class ScrollbarThemeComposite;
-
-class CC_EXPORT ScrollbarLayer : public ContentsScalingLayer {
- public:
-  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
-      OVERRIDE;
-
-  static scoped_refptr<ScrollbarLayer> Create(
-      scoped_ptr<WebKit::WebScrollbar>,
-      scoped_ptr<ScrollbarThemePainter>,
-      scoped_ptr<WebKit::WebScrollbarThemeGeometry>,
-      int scrollLayerId);
-
-  int scroll_layer_id() const { return scroll_layer_id_; }
-  void SetScrollLayerId(int id);
-
-  virtual bool OpacityCanAnimateOnImplThread() const OVERRIDE;
-
-  WebKit::WebScrollbar::Orientation Orientation() const;
-
-  // Layer interface
-  virtual void SetTexturePriorities(const PriorityCalculator& priority_calc)
-      OVERRIDE;
-  virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) OVERRIDE;
-  virtual void SetLayerTreeHost(LayerTreeHost* host) OVERRIDE;
-  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
-  virtual void CalculateContentsScale(float ideal_contents_scale,
-                                      bool animating_transform_to_screen,
-                                      float* contents_scale_x,
-                                      float* contents_scale_y,
-                                      gfx::Size* contentBounds) OVERRIDE;
-
-  virtual ScrollbarLayer* ToScrollbarLayer() OVERRIDE;
-
- protected:
-  ScrollbarLayer(
-      scoped_ptr<WebKit::WebScrollbar>,
-      scoped_ptr<ScrollbarThemePainter>,
-      scoped_ptr<WebKit::WebScrollbarThemeGeometry>,
-      int scrollLayerId);
-  virtual ~ScrollbarLayer();
-
- private:
-  void UpdatePart(CachingBitmapContentLayerUpdater* painter,
-                  LayerUpdater::Resource* resource,
-                  gfx::Rect rect,
-                  ResourceUpdateQueue* queue,
-                  RenderingStats* stats);
-  void CreateUpdaterIfNeeded();
-  gfx::Rect ScrollbarLayerRectToContentRect(gfx::Rect layer_rect) const;
-
-  bool is_dirty() const { return !dirty_rect_.IsEmpty(); }
-
-  int MaxTextureSize();
-  float ClampScaleToMaxTextureSize(float scale);
-
-  scoped_ptr<WebKit::WebScrollbar> scrollbar_;
-  scoped_ptr<ScrollbarThemePainter> painter_;
-  scoped_ptr<WebKit::WebScrollbarThemeGeometry> geometry_;
-  gfx::Size thumb_size_;
-  int scroll_layer_id_;
-
-  unsigned texture_format_;
-
-  gfx::RectF dirty_rect_;
-
-  scoped_refptr<CachingBitmapContentLayerUpdater> back_track_updater_;
-  scoped_refptr<CachingBitmapContentLayerUpdater> fore_track_updater_;
-  scoped_refptr<CachingBitmapContentLayerUpdater> thumb_updater_;
-
-  // All the parts of the scrollbar except the thumb
-  scoped_ptr<LayerUpdater::Resource> back_track_;
-  scoped_ptr<LayerUpdater::Resource> fore_track_;
-  scoped_ptr<LayerUpdater::Resource> thumb_;
-};
-
-}  // namespace cc
-
-#endif  // CC_SCROLLBAR_LAYER_H_