android: move overscroll effects to ui/

content/browser/android/edge_effect.h

-// Copyright (c) 2013 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 CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_
-#define CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "content/browser/android/edge_effect_base.h"
-
-namespace cc {
-class Layer;
-}
-
-namespace ui {
-class ResourceManager;
-}
-
-namespace content {
-
-// |EdgeEffect| mirrors its Android counterpart, EdgeEffect.java.
-// Conscious tradeoffs were made to align this as closely as possible with the
-// the original Android java version.
-// All coordinates and dimensions are in device pixels.
-class EdgeEffect : public EdgeEffectBase {
- public:
-  explicit EdgeEffect(ui::ResourceManager* resource_manager,
-                      float device_scale_factor);
-  ~EdgeEffect() override;
-
-  void Pull(base::TimeTicks current_time,
-            float delta_distance,
-            float displacement) override;
-  void Absorb(base::TimeTicks current_time, float velocity) override;
-  bool Update(base::TimeTicks current_time) override;
-  void Release(base::TimeTicks current_time) override;
-
-  void Finish() override;
-  bool IsFinished() const override;
-  float GetAlpha() const override;
-
-  void ApplyToLayers(Edge edge,
-                     const gfx::SizeF& viewport_size,
-                     float offset) override;
-  void SetParent(cc::Layer* parent) override;
-
-  // Thread-safe trigger to load resources.
-  static void PreloadResources(ui::ResourceManager* resource_manager);
-
- private:
-  class EffectLayer;
-  scoped_ptr<EffectLayer> edge_;
-  scoped_ptr<EffectLayer> glow_;
-
-  float base_edge_height_;
-  float base_glow_height_;
-
-  float edge_alpha_;
-  float edge_scale_y_;
-  float glow_alpha_;
-  float glow_scale_y_;
-
-  float edge_alpha_start_;
-  float edge_alpha_finish_;
-  float edge_scale_y_start_;
-  float edge_scale_y_finish_;
-  float glow_alpha_start_;
-  float glow_alpha_finish_;
-  float glow_scale_y_start_;
-  float glow_scale_y_finish_;
-
-  base::TimeTicks start_time_;
-  base::TimeDelta duration_;
-
-  State state_;
-
-  float pull_distance_;
-
-  DISALLOW_COPY_AND_ASSIGN(EdgeEffect);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_