wip: Aura-specific implementation of unified touch selection: touch_selection

ui/touch_selection/touch_selection_controller_impl.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__IMPL_H_
+#define UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER__IMPL_H_
+
+#include "base/timer/timer.h"
+#include "ui/touch_selection/touch_selection_controller.h"
+
+namespace ui {
+
+class UI_TOUCH_SELECTION_EXPORT TouchSelectionControllerImpl
+    : public TouchSelectionController {
+ public:
+  TouchSelectionControllerImpl(TouchSelectionControllerClient* client,
+                           base::TimeDelta tap_timeout,
+                           float tap_slop,
+                           bool show_on_tap_for_empty_editable);
+  ~TouchSelectionControllerImpl() override;
+
+  // TouchSelectionController:
+  bool OnSelectionBoundsUpdated(const SelectionBound& start,
+                                const SelectionBound& end) override;
+  bool WillHandleTouchEvent(const MotionEvent& event) override;
+  void OnTapEvent() override;
+  void OnLongPressEvent() override;
+  void AllowShowingFromCurrentSelection() override;
+  void HideAndDisallowShowingAutomatically() override;
+  void SetTemporarilyHidden(bool hidden) override;
+  void OnSelectionEditable(bool editable) override;
+  void OnSelectionEmpty(bool empty) override;
+  bool Animate(base::TimeTicks animate_time) override;
+  gfx::Rect GetRectBetweenBounds() const override;
+  void OnNativeViewMoved() override;
+  void OnOverscrollStarted() override;
+  void OnOverscrollCompleted() override;
+
+ protected:
+  TouchSelectionControllerClient* client() const { return client_; }
+
+  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_; }
+  bool is_selection_editable() const { return selection_editable_; }
+
+
+  virtual void ActivateInsertion();
+  virtual void DeactivateInsertion();
+  virtual void ActivateSelection();
+  virtual void DeactivateSelection();
+
+ private:
+  enum InputEventType { TAP, LONG_PRESS, INPUT_EVENT_TYPE_NONE };
+
+  // TouchHandleClient:
+  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;
+  base::TimeDelta GetTapTimeout() const override;
+  float GetTapSlop() const override;
+
+  void ShowInsertionHandleAutomatically();
+  void ShowSelectionHandlesAutomatically();
+
+  void OnInsertionChanged();
+  void OnSelectionChanged();
+
+  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;
+
+  void LogSelectionEnd();
+
+  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 text.
+  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_;
+
+  base::TimeTicks selection_start_time_;
+  // Whether a selection handle was dragged during the current 'selection
+  // session' - i.e. since the current selection has been activated.
+  bool selection_handle_was_dragged_;
+
+  DISALLOW_COPY_AND_ASSIGN(TouchSelectionControllerImpl);
+};
+
+}  // namespace ui
+
+#endif  // UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER__IMPL_H_