[Android] Composited selection handle rendering

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 <queue>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/output/begin_frame_args.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/renderer_host/delegated_frame_evictor.h"
 #include "content/browser/renderer_host/image_transport_factory_android.h"
 #include "content/browser/renderer_host/ime_adapter_android.h"
 #include "content/browser/renderer_host/input/gesture_text_selector.h"
+#include "content/browser/renderer_host/input/touch_selection_controller.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "ui/base/android/window_android_observer.h"
 #include "ui/events/gesture_detection/filtered_gesture_provider.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/vector2d_f.h"
 
@@ skipping 26 matching lines @@
 // -----------------------------------------------------------------------------
 // See comments in render_widget_host_view.h about this class and its members.
 // -----------------------------------------------------------------------------
 class CONTENT_EXPORT RenderWidgetHostViewAndroid
     : public RenderWidgetHostViewBase,
       public cc::DelegatedFrameResourceCollectionClient,
       public ImageTransportFactoryAndroidObserver,
       public ui::GestureProviderClient,
       public ui::WindowAndroidObserver,
       public DelegatedFrameEvictorClient,
-      public GestureTextSelectorClient {
+      public GestureTextSelectorClient,
+      public TouchSelectionControllerClient {
  public:
   RenderWidgetHostViewAndroid(RenderWidgetHostImpl* widget,
                               ContentViewCoreImpl* content_view_core);
   virtual ~RenderWidgetHostViewAndroid();
 
   // RenderWidgetHostView implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
   virtual void InitAsChild(gfx::NativeView parent_view) OVERRIDE;
   virtual void InitAsPopup(RenderWidgetHostView* parent_host_view,
                            const gfx::Rect& pos) OVERRIDE;
@@ skipping 124 matching lines @@
   void SendGestureEvent(const blink::WebGestureEvent& event);
 
   void OnDidChangeBodyBackgroundColor(SkColor color);
   void OnStartContentIntent(const GURL& content_url);
   void OnSetNeedsBeginFrame(bool enabled);
   void OnSmartClipDataExtracted(const base::string16& text,
                                 const base::string16& html,
                                 const gfx::Rect rect);
 
   bool OnTouchEvent(const ui::MotionEvent& event);
+  bool OnTouchHandleEvent(const ui::MotionEvent& event);
   void ResetGestureDetection();
   void SetDoubleTapSupportEnabled(bool enabled);
   void SetMultiTouchZoomSupportEnabled(bool enabled);
 
   long GetNativeImeAdapter();
 
   void WasResized();
 
   void GetScaledContentBitmap(
       float scale,
       SkColorType color_type,
       gfx::Rect src_subrect,
       const base::Callback<void(bool, const SkBitmap&)>& result_callback);
 
   bool HasValidFrame() const;
 
   void MoveCaret(const gfx::Point& point);
+  void HideTextHandles();
 
   void SynchronousFrameMetadata(
       const cc::CompositorFrameMetadata& frame_metadata);
 
   void SetOverlayVideoMode(bool enabled);
 
   typedef base::Callback<
       void(const base::string16& content, int start_offset, int end_offset)>
       TextSurroundingSelectionCallback;
   void SetTextSurroundingSelectionCallback(
       const TextSurroundingSelectionCallback& callback);
 
  private:
+  // TouchSelectionControllerClient implementation.
+  virtual bool SupportsAnimation() const OVERRIDE;
+  virtual void SetNeedsAnimate() OVERRIDE;
+  virtual void MoveCaret(const gfx::PointF& position) OVERRIDE;
+  virtual void SelectBetweenCoordinates(const gfx::PointF& start,
+                                        const gfx::PointF& end) OVERRIDE;
+  virtual void OnSelectionEvent(SelectionEventType event,
+                                const gfx::PointF& anchor_position) OVERRIDE;
+  virtual scoped_ptr<TouchHandleDrawable> CreateDrawable() OVERRIDE;
+
   void RunAckCallbacks();
 
   void DestroyDelegatedContent();
   void SwapDelegatedFrame(uint32 output_surface_id,
                           scoped_ptr<cc::DelegatedFrameData> frame_data);
   void SendDelegatedFrameAck(uint32 output_surface_id);
   void SendReturnedDelegatedResources(uint32 output_surface_id);
 
   void OnFrameMetadataUpdated(
       const cc::CompositorFrameMetadata& frame_metadata);
   void ComputeContentsSize(const cc::CompositorFrameMetadata& frame_metadata);
-  void ResetClipping();
-  void ClipContents(const gfx::Rect& clipping, const gfx::Size& content_size);
 
   void AttachLayers();
   void RemoveLayers();
 
   // Called after async screenshot task completes. Scales and crops the result
   // of the copy.
   static void PrepareTextureCopyOutputResult(
       const gfx::Size& dst_size_in_pixel,
       const SkColorType color_type,
       const base::TimeTicks& start_time,
@@ skipping 22 matching lines @@
   void ReleaseLocksOnSurface();
 
   // Drop any incoming frames from the renderer when there are locks on the
   // current frame.
   void RetainFrame(uint32 output_surface_id,
                    scoped_ptr<cc::CompositorFrame> frame);
 
   void InternalSwapCompositorFrame(uint32 output_surface_id,
                                    scoped_ptr<cc::CompositorFrame> frame);
 
-  void SetNeedsAnimate();
   bool Animate(base::TimeTicks frame_time);
 
+  void OnContentScrollingChange();
+  bool IsContentScrolling() const;
+
+  float GetDpiScale() const;
+
   // The model object.
   RenderWidgetHostImpl* host_;
 
   // Used to track whether this render widget needs a BeginFrame.
   bool needs_begin_frame_;
 
   bool is_showing_;
 
   // ContentViewCoreImpl is our interface to the view system.
   ContentViewCoreImpl* content_view_core_;
@@ skipping 28 matching lines @@
   // Note: |overscroll_effect_| will never be NULL, even if it's never enabled.
   scoped_ptr<OverscrollGlow> overscroll_effect_;
 
   // Provides gesture synthesis given a stream of touch events (derived from
   // Android MotionEvent's) and touch event acks.
   ui::FilteredGestureProvider gesture_provider_;
 
   // Handles gesture based text selection
   GestureTextSelector gesture_text_selector_;
 
+  // Manages selection handle rendering and manipulation.
+  // This will always be NULL if |content_view_core_| is NULL.
+  scoped_ptr<TouchSelectionController> selection_controller_;
+  bool touch_scrolling_;
+  size_t potentially_active_fling_count_;
+
   bool flush_input_requested_;
 
   int accelerated_surface_route_id_;
 
   // Size to use if we have no backing ContentViewCore
   gfx::Size default_size_;
 
   const bool using_synchronous_compositor_;
 
   scoped_ptr<DelegatedFrameEvictor> frame_evictor_;
@@ skipping 12 matching lines @@
   scoped_ptr<LastFrameInfo> last_frame_info_;
 
   TextSurroundingSelectionCallback text_surrounding_selection_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_