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

   1 // Copyright 2015 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_THROBBER_LAYER_H_
   6 #define CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_THROBBER_LAYER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/time/time.h"
  12 #include "cc/layers/content_layer_client.h"
  13 #include "chrome/browser/android/compositor/layer/layer.h"
  14 #include "third_party/skia/include/core/SkColor.h"
  15 #include "third_party/skia/include/core/SkPictureRecorder.h"
  16
  17 namespace cc {
  18 class DisplayItemList;
  19 class Layer;
  20 class PictureLayer;
  21 }
  22
  23 namespace gfx {
  24 class Rect;
  25 }
  26
  27 namespace chrome {
  28 namespace android {
  29
  30 // A layer representing throbber which we use as a reloading spinner on the
  31 // tab strip for tablets.
  32 // TODO(changwan): implement WAITING state for which we should spin
  33 // counterclockwise until connection to the server is made.
  34 class ThrobberLayer : public Layer, cc::ContentLayerClient {
  35  public:
  36   static scoped_refptr<ThrobberLayer> Create(SkColor color);
  37
  38   void Show(const base::Time& time);
  39   void Hide();
  40   void SetColor(SkColor color);
  41   void UpdateThrobber(const base::Time& time);
  42
  43   // Layer:
  44   scoped_refptr<cc::Layer> layer() override;
  45
  46   // cc::ContentLayerClient:
  47   void PaintContents(
  48       SkCanvas* canvas,
  49       const gfx::Rect& clip,
  50       ContentLayerClient::PaintingControlSetting painting_control) override;
  51   scoped_refptr<cc::DisplayItemList> PaintContentsToDisplayList(
  52       const gfx::Rect& clip,
  53       ContentLayerClient::PaintingControlSetting painting_control) override;
  54   bool FillsBoundsCompletely() const override;
  55   size_t GetApproximateUnsharedMemoryUsage() const override;
  56
  57  protected:
  58   explicit ThrobberLayer(unsigned int color);
  59   ~ThrobberLayer() override;
  60
  61  private:
  62   SkColor color_;
  63   base::Time start_time_;
  64   base::Time update_time_;
  65   scoped_refptr<cc::PictureLayer> layer_;
  66
  67   DISALLOW_COPY_AND_ASSIGN(ThrobberLayer);
  68 };
  69
  70 }  //  namespace android
  71 }  //  namespace chrome
  72
  73 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_THROBBER_LAYER_H_