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

content/browser/web_contents/touch_editable_impl_aura.h

-// Copyright (c) 2013 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_WEB_CONTENTS_TOUCH_EDITABLE_IMPL_AURA_H_
-#define CONTENT_BROWSER_WEB_CONTENTS_TOUCH_EDITABLE_IMPL_AURA_H_
-
-#include <deque>
-#include <map>
-#include <queue>
-
-#include "content/browser/renderer_host/render_widget_host_view_aura.h"
-#include "ui/aura/window_observer.h"
-#include "ui/base/touch/touch_editing_controller.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace ui {
-class Accelerator;
-}
-
-namespace content {
-class TouchEditableImplAuraTest;
-
-// Aura specific implementation of ui::TouchEditable for a RenderWidgetHostView.
-class CONTENT_EXPORT TouchEditableImplAura
-    : public ui::TouchEditable,
-      public NON_EXPORTED_BASE(RenderWidgetHostViewAura::TouchEditingClient) {
- public:
-  ~TouchEditableImplAura() override;
-
-  static TouchEditableImplAura* Create();
-
-  void AttachToView(RenderWidgetHostViewAura* view);
-
-  // Updates the |touch_selection_controller_| or ends touch editing session
-  // depending on the current selection and cursor state.
-  void UpdateEditingController();
-
-  virtual void OverscrollStarted();
-  virtual void OverscrollCompleted();
-
-  // Overridden from RenderWidgetHostViewAura::TouchEditingClient.
-  void StartTouchEditing() override;
-  void EndTouchEditing(bool quick) override;
-  void OnSelectionOrCursorChanged(const ui::SelectionBound& anchor,
-                                  const ui::SelectionBound& focus) override;
-  void OnTextInputTypeChanged(ui::TextInputType type) override;
-  bool HandleInputEvent(const ui::Event* event) override;
-  void GestureEventAck(int gesture_event_type) override;
-  void DidStopFlinging() override;
-  void OnViewDestroyed() override;
-
-  // Overridden from ui::TouchEditable:
-  void SelectRect(const gfx::Point& start, const gfx::Point& end) override;
-  void MoveCaretTo(const gfx::Point& point) override;
-  void GetSelectionEndPoints(ui::SelectionBound* anchor,
-                             ui::SelectionBound* focus) override;
-  gfx::Rect GetBounds() override;
-  gfx::NativeView GetNativeView() const override;
-  void ConvertPointToScreen(gfx::Point* point) override;
-  void ConvertPointFromScreen(gfx::Point* point) override;
-  bool DrawsHandles() override;
-  void OpenContextMenu(const gfx::Point& anchor) override;
-  bool IsCommandIdChecked(int command_id) const override;
-  bool IsCommandIdEnabled(int command_id) const override;
-  bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override;
-  void ExecuteCommand(int command_id, int event_flags) override;
-  void DestroyTouchSelection() override;
-
- protected:
-  TouchEditableImplAura();
-
- private:
-  friend class TouchEditableImplAuraTest;
-
-  // A convenience function that is called after scroll/fling/overscroll ends to
-  // re-activate touch selection if necessary.
-  void StartTouchEditingIfNecessary();
-
-  void Cleanup();
-
-  // Bounds for the selection.
-  ui::SelectionBound selection_anchor_;
-  ui::SelectionBound selection_focus_;
-
-  // The current text input type.
-  ui::TextInputType text_input_type_;
-
-  RenderWidgetHostViewAura* rwhva_;
-  scoped_ptr<ui::TouchEditingControllerDeprecated> touch_selection_controller_;
-
-  // True if |rwhva_| is currently handling a gesture that could result in a
-  // change in selection (long press, double tap or triple tap).
-  bool selection_gesture_in_process_;
-
-  // Set to true if handles are hidden when user is scrolling. Used to determine
-  // whether to re-show handles after a scrolling session.
-  bool handles_hidden_due_to_scroll_;
-
-  // Keep track of scrolls/overscrolls in progress.
-  bool scroll_in_progress_;
-  bool overscroll_in_progress_;
-
-  // Used to track if a textfield was focused when the current tap gesture
-  // happened.
-  bool textfield_was_focused_on_tap_;
-
-  DISALLOW_COPY_AND_ASSIGN(TouchEditableImplAura);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_WEB_CONTENTS_TOUCH_EDITABLE_IMPL_AURA_H_