Reland: Implement Aura side of unified touch text selection for contents

ui/touch_selection/touch_selection_controller.h

 // Copyright 2014 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 UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_H_
 #define UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_H_
 
 #include "ui/base/touch/selection_bound.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/rect_f.h"
@@ skipping 20 matching lines @@
                                 const gfx::PointF& position) = 0;
   virtual scoped_ptr<TouchHandleDrawable> CreateDrawable() = 0;
 };
 
 // Controller for manipulating text selection via touch input.
 class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
     : public TouchHandleClient {
  public:
   TouchSelectionController(TouchSelectionControllerClient* client,
                            base::TimeDelta tap_timeout,
-                           float tap_slop);
+                           float tap_slop,
+                           bool show_on_tap_for_empty_editable);
   ~TouchSelectionController() override;
 
-  // To be called when the selection bounds have changed.
+  // 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.
-  void OnSelectionBoundsChanged(const SelectionBound& start,
+  void OnSelectionBoundsUpdated(const SelectionBound& start,
                                 const SelectionBound& end);
 
   // Allows touch-dragging of the handle.
   // Returns true iff the event was consumed, in which case the caller should
   // cease further handling of the event.
   bool WillHandleTouchEvent(const MotionEvent& event);
 
   // To be called before forwarding a tap event. This allows automatically
   // showing the insertion handle from subsequent bounds changes.
   void OnTapEvent();
@@ skipping 16 matching lines @@
   // To be called when the editability of the focused region changes.
   void OnSelectionEditable(bool editable);
 
   // To be called when the contents of the focused region changes.
   void OnSelectionEmpty(bool empty);
 
   // Ticks an active animation, as requested to the client by |SetNeedsAnimate|.
   // Returns true if an animation is active and requires further ticking.
   bool Animate(base::TimeTicks animate_time);
 
+  void TryActivateSelection();
+
+  const SelectionBound& start() const { return start_; }
+  const SelectionBound& end() const { return end_; }
+
+  bool is_insertion_active() const { return is_insertion_active_; }
+  bool is_selection_active() const { return is_selection_active_; }
+
  private:
+  friend class TouchSelectionControllerAuraTest;
+
   enum InputEventType { TAP, LONG_PRESS, INPUT_EVENT_TYPE_NONE };
 
   // TouchHandleClient implementation.
   void OnHandleDragBegin(const TouchHandle& handle) override;
   void OnHandleDragUpdate(const TouchHandle& handle,
                           const gfx::PointF& new_position) override;
   void OnHandleDragEnd(const TouchHandle& handle) override;
   void OnHandleTapped(const TouchHandle& handle) override;
   void SetNeedsAnimate() override;
   scoped_ptr<TouchHandleDrawable> CreateDrawable() override;
@@ skipping 13 matching lines @@
   void ResetCachedValuesIfInactive();
 
   const gfx::PointF& GetStartPosition() const;
   const gfx::PointF& GetEndPosition() const;
   gfx::Vector2dF GetStartLineOffset() const;
   gfx::Vector2dF GetEndLineOffset() const;
   bool GetStartVisible() const;
   bool GetEndVisible() const;
   TouchHandle::AnimationStyle GetAnimationStyle(bool was_active) const;
 
+  TouchHandle* insertion_handle_for_testing() const {
+    return insertion_handle_.get();
+  }
+
   TouchSelectionControllerClient* const client_;
   const base::TimeDelta tap_timeout_;
   const float tap_slop_;
 
+  // Controls whether an insertion handle is shown on a tap for an empty
+  // editable selection.
+  bool show_on_tap_for_empty_editable_;
+
   InputEventType response_pending_input_event_;
 
   SelectionBound start_;
   SelectionBound end_;
   TouchHandleOrientation start_orientation_;
   TouchHandleOrientation end_orientation_;
 
   scoped_ptr<TouchHandle> insertion_handle_;
   bool is_insertion_active_;
   bool activate_insertion_automatically_;
 
   scoped_ptr<TouchHandle> start_selection_handle_;
   scoped_ptr<TouchHandle> end_selection_handle_;
   bool is_selection_active_;
   bool activate_selection_automatically_;
 
   bool selection_empty_;
   bool selection_editable_;
 
   bool temporarily_hidden_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionController);
 };
 
 }  // namespace ui
 
 #endif  // UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_H_