content/browser/android/edge_effect_l.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 CONTENT_BROWSER_ANDROID_EDGE_EFFECT_L_H_
   6 #define CONTENT_BROWSER_ANDROID_EDGE_EFFECT_L_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/browser/android/edge_effect_base.h"
  11 #include "ui/gfx/geometry/rect_f.h"
  12 #include "ui/gfx/geometry/size.h"
  13
  14 namespace cc {
  15 class Layer;
  16 class UIResourceLayer;
  17 }
  18
  19 namespace ui {
  20 class ResourceManager;
  21 }
  22
  23 namespace content {
  24
  25 // |EdgeEffectL| mirrors its Android L counterpart, EdgeEffect.java.
  26 // Conscious tradeoffs were made to align this as closely as possible with the
  27 // the original Android java version.
  28 // All coordinates and dimensions are in device pixels.
  29 class EdgeEffectL : public EdgeEffectBase {
  30  public:
  31   explicit EdgeEffectL(ui::ResourceManager* resource_manager);
  32   ~EdgeEffectL() override;
  33
  34   void Pull(base::TimeTicks current_time,
  35             float delta_distance,
  36             float displacement) override;
  37   void Absorb(base::TimeTicks current_time, float velocity) override;
  38   bool Update(base::TimeTicks current_time) override;
  39   void Release(base::TimeTicks current_time) override;
  40
  41   void Finish() override;
  42   bool IsFinished() const override;
  43   float GetAlpha() const override;
  44
  45   void ApplyToLayers(Edge edge,
  46                      const gfx::SizeF& viewport_size,
  47                      float offset) override;
  48   void SetParent(cc::Layer* parent) override;
  49
  50   // Thread-safe trigger to load resources.
  51   static void PreloadResources(ui::ResourceManager* resource_manager);
  52
  53  private:
  54   ui::ResourceManager* const resource_manager_;
  55
  56   scoped_refptr<cc::UIResourceLayer> glow_;
  57
  58   float glow_alpha_;
  59   float glow_scale_y_;
  60
  61   float glow_alpha_start_;
  62   float glow_alpha_finish_;
  63   float glow_scale_y_start_;
  64   float glow_scale_y_finish_;
  65
  66   gfx::RectF arc_rect_;
  67   gfx::Size bounds_;
  68   float displacement_;
  69   float target_displacement_;
  70
  71   base::TimeTicks start_time_;
  72   base::TimeDelta duration_;
  73
  74   State state_;
  75
  76   float pull_distance_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(EdgeEffectL);
  79 };
  80
  81 }  // namespace content
  82
  83 #endif  // CONTENT_BROWSER_ANDROID_EDGE_EFFECT_L_H_