wip: Touch Text Selection Prototypes

ui/touch_selection/touch_selection_controller.h

Index: ui/touch_selection/touch_selection_controller.h
diff --git a/ui/touch_selection/touch_selection_controller.h b/ui/touch_selection/touch_selection_controller.h
index b18353b5287556d58fa447110cf54fb4e08c7d3a..69982875892382034e1829407b8ca3f637cffc1f 100644
--- a/ui/touch_selection/touch_selection_controller.h
+++ b/ui/touch_selection/touch_selection_controller.h
@@ -15,6 +15,7 @@
 
 namespace ui {
 class MotionEvent;
+class GranularityStrategy;
 
 // Interface through which |TouchSelectionController| issues selection-related
 // commands, notifications and requests.
@@ -39,12 +40,16 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionControllerClient {
 class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
     : public TouchHandleClient {
  public:
-  TouchSelectionController(TouchSelectionControllerClient* client,
-                           base::TimeDelta tap_timeout,
-                           float tap_slop,
-                           bool show_on_tap_for_empty_editable);
+  TouchSelectionController(
+      TouchSelectionControllerClient* client,
+      base::TimeDelta tap_timeout,
+      float tap_slop,
+      bool show_on_tap_for_empty_editable,
+      TextSelectionGranularityStrategy selection_granularity_strategy);
   ~TouchSelectionController() override;
 
+  void SetVelocityStrategyParameters(int halfDecayMs, int threshold);
+
   // To be called when the selection bounds info has been updated.
   // Note that such updates will trigger handle updates only if preceded
   // by an appropriate call to allow automatic showing.
@@ -99,9 +104,11 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   enum InputEventType { TAP, LONG_PRESS, INPUT_EVENT_TYPE_NONE };
 
   // TouchHandleClient implementation.
-  void OnHandleDragBegin(const TouchHandle& handle) override;
+  void OnHandleDragBegin(const TouchHandle& handle,
+                         base::TimeTicks event_time) override;
   void OnHandleDragUpdate(const TouchHandle& handle,
-                          const gfx::PointF& new_position) override;
+                          const gfx::PointF& new_position,
+                          base::TimeTicks event_time) override;
   void OnHandleDragEnd(const TouchHandle& handle) override;
   void OnHandleTapped(const TouchHandle& handle) override;
   void SetNeedsAnimate() override;
@@ -154,6 +161,7 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   scoped_ptr<TouchHandle> start_selection_handle_;
   scoped_ptr<TouchHandle> end_selection_handle_;
+
   bool is_selection_active_;
   bool activate_selection_automatically_;
 
@@ -162,6 +170,9 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   bool temporarily_hidden_;
 
+  TextSelectionGranularityStrategy selection_granularity_strategy_;
+  scoped_ptr<GranularityStrategy> granularity_strategy_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionController);
 };