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

content/browser/renderer_host/render_widget_host_view_aura.h

 // Copyright (c) 2012 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_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 13 matching lines @@
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/content_export.h"
 #include "content/common/cursors/webcursor.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/cursor_client_observer.h"
 #include "ui/aura/client/focus_change_observer.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_tree_host_observer.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/base/touch/selection_bound.h"
-#include "ui/base/touch/touch_editing_controller.h"
 #include "ui/events/gestures/motion_event_aura.h"
 #include "ui/gfx/display_observer.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/wm/public/activation_delegate.h"
 
 struct ViewHostMsg_TextInputState_Params;
 
 namespace aura {
 class WindowTracker;
@@ skipping 15 matching lines @@
 
 namespace gpu {
 struct Mailbox;
 }
 
 namespace ui {
 class CompositorLock;
 class InputMethod;
 class LocatedEvent;
 class Texture;
+class TouchSelectionController;
 }
 
 namespace content {
 #if defined(OS_WIN)
 class LegacyRenderWidgetHostHWND;
 #endif
 
 class OverscrollController;
 class RenderFrameHostImpl;
 class RenderWidgetHostImpl;
 class RenderWidgetHostView;
+class TouchSelectionControllerClientAura;
 
 // RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
 class CONTENT_EXPORT RenderWidgetHostViewAura
     : public RenderWidgetHostViewBase,
       public DelegatedFrameHostClient,
       public BeginFrameObserverProxyClient,
       public ui::TextInputClient,
       public gfx::DisplayObserver,
       public aura::WindowTreeHostObserver,
       public aura::WindowDelegate,
       public aura::client::ActivationDelegate,
       public aura::client::FocusChangeObserver,
       public aura::client::CursorClientObserver {
  public:
-  // Displays and controls touch editing elements such as selection handles.
-  class TouchEditingClient {
-   public:
-    TouchEditingClient() {}
-
-    // Tells the client to start showing touch editing handles.
-    virtual void StartTouchEditing() = 0;
-
-    // Notifies the client that touch editing is no longer needed. |quick|
-    // determines whether the handles should fade out quickly or slowly.
-    virtual void EndTouchEditing(bool quick) = 0;
-
-    // Notifies the client that the selection bounds need to be updated.
-    virtual void OnSelectionOrCursorChanged(
-        const ui::SelectionBound& anchor,
-        const ui::SelectionBound& focus) = 0;
-
-    // Notifies the client that the current text input type as changed.
-    virtual void OnTextInputTypeChanged(ui::TextInputType type) = 0;
-
-    // Notifies the client that an input event is about to be sent to the
-    // renderer. Returns true if the client wants to stop event propagation.
-    virtual bool HandleInputEvent(const ui::Event* event) = 0;
-
-    // Notifies the client that a gesture event ack was received.
-    virtual void GestureEventAck(int gesture_event_type) = 0;
-
-    // Notifies the client that the fling has ended, so it can activate touch
-    // editing if needed.
-    virtual void DidStopFlinging() = 0;
-
-    // This is called when the view is destroyed, so that the client can
-    // perform any necessary clean-up.
-    virtual void OnViewDestroyed() = 0;
-
-   protected:
-    virtual ~TouchEditingClient() {}
-  };
-
-  void set_touch_editing_client(TouchEditingClient* client) {
-    touch_editing_client_ = client;
-  }
-
   // When |is_guest_view_hack| is true, this view isn't really the view for
   // the |widget|, a RenderWidgetHostViewGuest is.
   //
   // TODO(lazyboy): Remove |is_guest_view_hack| once BrowserPlugin has migrated
   // to use RWHVChildFrame (http://crbug.com/330264).
   RenderWidgetHostViewAura(RenderWidgetHost* host, bool is_guest_view_hack);
 
   // RenderWidgetHostView implementation.
   bool OnMessageReceived(const IPC::Message& msg) override;
   void InitAsChild(gfx::NativeView parent_view) override;
@@ skipping 189 matching lines @@
   // Method to indicate if this instance is shutting down or closing.
   // TODO(shrikant): Discuss around to see if it makes sense to add this method
   // as part of RenderWidgetHostView.
   bool IsClosing() const { return in_shutdown_; }
 
   // Sets whether the overscroll controller should be enabled for this page.
   void SetOverscrollControllerEnabled(bool enabled);
 
   void SnapToPhysicalPixelBoundary();
 
+  ui::TouchSelectionController* selection_controller() const {
+    return selection_controller_.get();
+  }
+
+  TouchSelectionControllerClientAura* selection_controller_client() const {
+    return selection_controller_client_.get();
+  }
+
   OverscrollController* overscroll_controller() const {
     return overscroll_controller_.get();
   }
 
   // Called when the context menu is about to be displayed.
   void OnShowContextMenu();
 
+  // Used in tests to set a mock client for touch selection controller. It will
+  // create a new touch selection controller for the new client.
+  void SetSelectionControllerClientForTest(
+      scoped_ptr<TouchSelectionControllerClientAura> client);
+
  protected:
   ~RenderWidgetHostViewAura() override;
 
   // Exposed for tests.
   aura::Window* window() { return window_; }
 
   DelegatedFrameHost* GetDelegatedFrameHost() const {
     return delegated_frame_host_.get();
   }
   const ui::MotionEventAura& pointer_state() const { return pointer_state_; }
@@ skipping 139 matching lines @@
   bool CanRendererHandleEvent(const ui::MouseEvent* event,
                               bool mouse_locked,
                               bool selection_popup);
 
   // Called when the parent window bounds change.
   void HandleParentBoundsChanged();
 
   // Called when the parent window hierarchy for our window changes.
   void ParentHierarchyChanged();
 
+  // Helper function to be called whenever new selection information is
+  // received. It will update selection controller.
+  void SelectionUpdated(bool is_editable,
+                        bool is_empty_text_form_control,
+                        const ui::SelectionBound& start,
+                        const ui::SelectionBound& end);
+
+  // Helper function to create a selection controller.
+  void CreateSelectionController();
+
+  // Performs gesture handling needed for touch text selection. Sets event as
+  // handled if it should not be further processed.
+  void HandleGestureForTouchSelection(ui::GestureEvent* event);
+
   // The model object.
   RenderWidgetHostImpl* host_;
 
   aura::Window* window_;
 
   scoped_ptr<DelegatedFrameHost> delegated_frame_host_;
 
   scoped_ptr<WindowObserver> window_observer_;
 
   // Tracks the ancestors of the RWHVA window for window location changes.
@@ skipping 117 matching lines @@
   // exercise.
   bool legacy_window_destroyed_;
 
   // Set to true when a context menu is being displayed. Reset to false when
   // a mouse leave is received in this context.
   bool showing_context_menu_;
 #endif
 
   bool has_snapped_to_boundary_;
 
-  TouchEditingClient* touch_editing_client_;
+  scoped_ptr<TouchSelectionControllerClientAura> selection_controller_client_;
+  scoped_ptr<ui::TouchSelectionController> selection_controller_;
 
   scoped_ptr<OverscrollController> overscroll_controller_;
 
   // The last scroll offset of the view.
   gfx::Vector2dF last_scroll_offset_;
 
   gfx::Insets insets_;
 
   std::vector<ui::LatencyInfo> software_latency_info_;
 
@@ skipping 12 matching lines @@
 
   BeginFrameObserverProxy begin_frame_observer_proxy_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAura> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_