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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_WEB_CONTENTS_TOUCH_EDITABLE_IMPL_AURA_H_
      6 #define CONTENT_BROWSER_WEB_CONTENTS_TOUCH_EDITABLE_IMPL_AURA_H_
      7 
      8 #include <deque>
      9 #include <map>
     10 #include <queue>
     11 
     12 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
     13 #include "ui/aura/window_observer.h"
     14 #include "ui/base/touch/touch_editing_controller.h"
     15 #include "ui/gfx/native_widget_types.h"
     16 #include "ui/gfx/point.h"
     17 #include "ui/gfx/rect.h"
     18 
     19 namespace ui {
     20 class Accelerator;
     21 }
     22 
     23 namespace content {
     24 class TouchEditableImplAuraTest;
     25 
     26 // Aura specific implementation of ui::TouchEditable for a RenderWidgetHostView.
     27 class CONTENT_EXPORT TouchEditableImplAura
     28     : public ui::TouchEditable,
     29       public NON_EXPORTED_BASE(RenderWidgetHostViewAura::TouchEditingClient) {
     30  public:
     31   virtual ~TouchEditableImplAura();
     32 
     33   static TouchEditableImplAura* Create();
     34 
     35   void AttachToView(RenderWidgetHostViewAura* view);
     36 
     37   // Updates the |touch_selection_controller_| or ends touch editing session
     38   // depending on the current selection and cursor state.
     39   void UpdateEditingController();
     40 
     41   void OverscrollStarted();
     42   void OverscrollCompleted();
     43 
     44   // Overridden from RenderWidgetHostViewAura::TouchEditingClient.
     45   virtual void StartTouchEditing() OVERRIDE;
     46   virtual void EndTouchEditing(bool quick) OVERRIDE;
     47   virtual void OnSelectionOrCursorChanged(const gfx::Rect& anchor,
     48                                           const gfx::Rect& focus) OVERRIDE;
     49   virtual void OnTextInputTypeChanged(ui::TextInputType type) OVERRIDE;
     50   virtual bool HandleInputEvent(const ui::Event* event) OVERRIDE;
     51   virtual void GestureEventAck(int gesture_event_type) OVERRIDE;
     52   virtual void DidStopFlinging() OVERRIDE;
     53   virtual void OnViewDestroyed() OVERRIDE;
     54 
     55   // Overridden from ui::TouchEditable:
     56   virtual void SelectRect(const gfx::Point& start,
     57                           const gfx::Point& end) OVERRIDE;
     58   virtual void MoveCaretTo(const gfx::Point& point) OVERRIDE;
     59   virtual void GetSelectionEndPoints(gfx::Rect* p1, gfx::Rect* p2) OVERRIDE;
     60   virtual gfx::Rect GetBounds() OVERRIDE;
     61   virtual gfx::NativeView GetNativeView() const OVERRIDE;
     62   virtual void ConvertPointToScreen(gfx::Point* point) OVERRIDE;
     63   virtual void ConvertPointFromScreen(gfx::Point* point) OVERRIDE;
     64   virtual bool DrawsHandles() OVERRIDE;
     65   virtual void OpenContextMenu(const gfx::Point& anchor) OVERRIDE;
     66   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
     67   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
     68   virtual bool GetAcceleratorForCommandId(
     69       int command_id,
     70       ui::Accelerator* accelerator) OVERRIDE;
     71   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
     72   virtual void DestroyTouchSelection() OVERRIDE;
     73 
     74  protected:
     75   TouchEditableImplAura();
     76 
     77  private:
     78   friend class TouchEditableImplAuraTest;
     79 
     80   // A convenience function that is called after scroll/fling/overscroll ends to
     81   // re-activate touch selection if necessary.
     82   void ScrollEnded();
     83 
     84   void Cleanup();
     85 
     86   // Rectangles for the selection anchor and focus.
     87   gfx::Rect selection_anchor_rect_;
     88   gfx::Rect selection_focus_rect_;
     89 
     90   // The current text input type.
     91   ui::TextInputType text_input_type_;
     92 
     93   RenderWidgetHostViewAura* rwhva_;
     94   scoped_ptr<ui::TouchSelectionController> touch_selection_controller_;
     95 
     96   // True if |rwhva_| is currently handling a gesture that could result in a
     97   // change in selection (long press, double tap or triple tap).
     98   bool selection_gesture_in_process_;
     99 
    100   // Set to true if handles are hidden when user is scrolling. Used to determine
    101   // whether to re-show handles after a scrolling session.
    102   bool handles_hidden_due_to_scroll_;
    103 
    104   // Keeps track of number of scrolls/flings/overscrolls in progress.
    105   int scrolls_in_progress_;
    106 
    107   // Used to track if a textfield was focused when the current tap gesture
    108   // happened.
    109   bool textfield_was_focused_on_tap_;
    110 
    111   DISALLOW_COPY_AND_ASSIGN(TouchEditableImplAura);
    112 };
    113 
    114 }  // namespace content
    115 
    116 #endif  // CONTENT_BROWSER_WEB_CONTENTS_TOUCH_EDITABLE_IMPL_AURA_H_
    117