chrome/browser/android/compositor/layer/content_layer.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_CONTENT_LAYER_H_
   6 #define CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_CONTENT_LAYER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "chrome/browser/android/compositor/layer/layer.h"
  11 #include "ui/gfx/geometry/rect.h"
  12 #include "ui/gfx/geometry/size.h"
  13
  14 namespace cc {
  15 class Layer;
  16 }
  17
  18 namespace chrome {
  19 namespace android {
  20
  21 class TabContentManager;
  22 class ThumbnailLayer;
  23
  24 // Sub layer tree representation of the contents of a tab.
  25 // Contains logic to temporarily display a static thumbnail
  26 // when the content layer is not available.
  27 // To specialize call SetProperties.
  28 class ContentLayer : public Layer {
  29  public:
  30   static scoped_refptr<ContentLayer> Create(
  31       TabContentManager* tab_content_manager);
  32   void SetProperties(int id,
  33                      bool can_use_live_layer,
  34                      bool can_use_ntp_fallback,
  35                      float static_to_view_blend,
  36                      bool should_override_content_alpha,
  37                      float content_alpha_override,
  38                      float saturation,
  39                      const gfx::Rect& desired_bounds,
  40                      const gfx::Size& content_size);
  41   bool ShowingLiveLayer() { return !static_attached_ && content_attached_; }
  42   gfx::Size GetContentSize();
  43
  44   scoped_refptr<cc::Layer> layer() override;
  45
  46  protected:
  47   explicit ContentLayer(TabContentManager* tab_content_manager);
  48   ~ContentLayer() override;
  49
  50  private:
  51   void SetContentLayer(scoped_refptr<cc::Layer> layer);
  52   void SetStaticLayer(scoped_refptr<ThumbnailLayer> layer);
  53   void ClipContentLayer(scoped_refptr<cc::Layer> content_layer,
  54                         gfx::Rect clipping,
  55                         gfx::Size content_size);
  56   void ClipStaticLayer(scoped_refptr<ThumbnailLayer> static_layer,
  57                        gfx::Rect clipping);
  58
  59   scoped_refptr<cc::Layer> layer_;
  60   scoped_refptr<ThumbnailLayer> static_layer_;
  61   bool content_attached_;
  62   bool static_attached_;
  63   float saturation_;
  64
  65   TabContentManager* tab_content_manager_;
  66
  67   DISALLOW_COPY_AND_ASSIGN(ContentLayer);
  68 };
  69
  70 }  //  namespace android
  71 }  //  namespace chrome
  72
  73 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_CONTENT_LAYER_H_