Add overscroll edge effect animations for Android.

content/browser/renderer_host/render_widget_host_view_android.h

 // Copyright (c) 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <map>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
+#include "base/timer.h"
 #include "content/browser/renderer_host/ime_adapter_android.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/vector2d_f.h"
 
 struct ViewHostMsg_TextInputState_Params;
 
 struct GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params;
 struct GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params;
 
 namespace cc {
 class Layer;
 class TextureLayer;
 }
 
 namespace WebKit {
 class WebExternalTextureLayer;
 class WebTouchEvent;
 class WebMouseEvent;
 }
 
 namespace content {
 class ContentViewCoreImpl;
+class OverscrollGlow;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class SurfaceTextureTransportClient;
 struct NativeWebKeyboardEvent;
 
 // -----------------------------------------------------------------------------
 // See comments in render_widget_host_view.h about this class and its members.
 // -----------------------------------------------------------------------------
 class RenderWidgetHostViewAndroid : public RenderWidgetHostViewBase {
  public:
@@ skipping 94 matching lines @@
   virtual void OnSwapCompositorFrame(
       scoped_ptr<cc::CompositorFrame> frame) OVERRIDE;
   virtual void UpdateFrameInfo(const gfx::Vector2dF& scroll_offset,
                                float page_scale_factor,
                                const gfx::Vector2dF& page_scale_factor_limits,
                                const gfx::SizeF& content_size,
                                const gfx::SizeF& viewport_size,
                                const gfx::Vector2dF& controls_offset,
                                const gfx::Vector2dF& content_offset,
                                float overdraw_bottom_height) OVERRIDE;
+  virtual void OnOverscrolled(const gfx::Vector2dF& accumulated_overscroll,
+                              const gfx::Vector2dF& current_fling_velocity)
+                                  OVERRIDE;
   virtual void ShowDisambiguationPopup(const gfx::Rect& target_rect,
                                        const SkBitmap& zoomed_bitmap) OVERRIDE;
 
   // Non-virtual methods
   void SetContentViewCore(ContentViewCoreImpl* content_view_core);
   SkColor GetCachedBackgroundColor() const;
   void SendKeyEvent(const NativeWebKeyboardEvent& event);
   void SendTouchEvent(const WebKit::WebTouchEvent& event);
   void SendMouseEvent(const WebKit::WebMouseEvent& event);
   void SendMouseWheelEvent(const WebKit::WebMouseWheelEvent& event);
   void SendGestureEvent(const WebKit::WebGestureEvent& event);
 
   void OnProcessImeBatchStateAck(bool is_begin);
   void OnDidChangeBodyBackgroundColor(SkColor color);
   void OnStartContentIntent(const GURL& content_url);
+  void OnSetOverscrollResources();
 
   int GetNativeImeAdapter();
 
   void WasResized();
 
   WebKit::WebGLId GetScaledContentTexture(float scale, gfx::Size* out_size);
   bool PopulateBitmapWithContents(jobject jbitmap);
 
   bool HasValidFrame() const;
 
   // Select all text between the given coordinates.
   void SelectRange(const gfx::Point& start, const gfx::Point& end);
 
   void MoveCaret(const gfx::Point& point);
 
  private:
   void BuffersSwapped(const gpu::Mailbox& mailbox,
                       const gfx::Size texture_size,
                       const gfx::SizeF content_size,
                       const base::Closure& ack_callback);
+  void AttachLayers();
+  void RemoveLayers();
+
+  void SetOverscrollEffect(scoped_ptr<OverscrollGlow> overscroll_effect);
+  void AnimationCallback();
+  void AnimateIfNeeded();
+
+  enum { kDesiredAnimationIntervalInMs = 16 };
 
   // The model object.
   RenderWidgetHostImpl* host_;
 
   // Whether or not this widget is potentially attached to the view hierarchy.
   // This view may not actually be attached if this is true, but it should be
   // treated as such, because as soon as a ContentViewCore is set the layer
   // will be attached automatically.
-  bool is_layer_attached_;
+  bool are_layers_attached_;
 
   // ContentViewCoreImpl is our interface to the view system.
   ContentViewCoreImpl* content_view_core_;
 
   ImeAdapterAndroid ime_adapter_android_;
 
   // Body background color of the underlying document.
   SkColor cached_background_color_;
 
   // The texture layer for this view when using browser-side compositing.
   scoped_refptr<cc::TextureLayer> texture_layer_;
 
-  // The layer used for rendering the contents of this view.
-  // It is either owned by texture_layer_ or surface_texture_transport_
-  // depending on the mode.
+  // Layer used for rendering the contents of this view.
   scoped_refptr<cc::Layer> layer_;
 
   // The most recent texture id that was pushed to the texture layer.
   unsigned int texture_id_in_layer_;
 
   // The most recent texture size that was pushed to the texture layer.
   gfx::Size texture_size_in_layer_;
 
   // Used for image transport when needing to share resources across threads.
   scoped_ptr<SurfaceTextureTransportClient> surface_texture_transport_;
 
   // The mailbox of the previously received frame.
   gpu::Mailbox current_mailbox_;
 
   // The mailbox of the frame we last returned.
   gpu::Mailbox last_mailbox_;
 
+  // Used to render overscroll overlays
+  bool overscroll_resources_updated_;
+  scoped_ptr<OverscrollGlow> overscroll_effect_;
+  base::OneShotTimer<RenderWidgetHostViewAndroid> animation_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_