mus: Introduce API for embedder to dispatch event to the embeded client.

components/mus/public/cpp/window_tree_client.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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_CLIENT_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 41 matching lines @@
 //   if the owner of the roots Embed()s another app in all the roots, or all
 //   the roots are explicitly deleted.
 // . The connection to mus is lost.
 // . Explicitly by way of calling delete.
 //
 // When WindowTreeClient is deleted all windows are deleted (and observers
 // notified). This is followed by calling
 // WindowTreeClientDelegate::OnWindowTreeClientDestroyed().
 class WindowTreeClient : public mojom::WindowTreeClient,
                          public mojom::WindowManager,
+                         public mojom::InputEventHandler,
                          public WindowManagerClient {
  public:
   WindowTreeClient(WindowTreeClientDelegate* delegate,
                    WindowManagerDelegate* window_manager_delegate,
                    mojom::WindowTreeClientRequest request);
   ~WindowTreeClient() override;
 
   // Establishes the connection by way of the WindowTreeFactory.
   void ConnectViaWindowTreeFactory(shell::Connector* connector);
 
@@ skipping 221 matching lines @@
   void OnWindowInputEvent(uint32_t event_id,
                           Id window_id,
                           std::unique_ptr<ui::Event> event,
                           uint32_t event_observer_id) override;
   void OnEventObserved(std::unique_ptr<ui::Event> event,
                        uint32_t event_observer_id) override;
   void OnWindowFocused(Id focused_window_id) override;
   void OnWindowPredefinedCursorChanged(Id window_id,
                                        mojom::Cursor cursor) override;
   void OnChangeCompleted(uint32_t change_id, bool success) override;
+  void RequestInputEventHandler(
+      mojom::InputEventHandlerRequest request) override;
   void RequestClose(uint32_t window_id) override;
   void GetWindowManager(
       mojo::AssociatedInterfaceRequest<WindowManager> internal) override;
 
   // Overridden from WindowManager:
   void OnConnect(ClientSpecificId client_id) override;
   void WmNewDisplayAdded(mojom::DisplayPtr display,
                          mojom::WindowDataPtr root_data,
                          bool parent_drawn) override;
   void WmSetBounds(uint32_t change_id,
@@ skipping 21 matching lines @@
                       const base::Callback<void(bool)>& callback) override;
   void RemoveAccelerator(uint32_t id) override;
   void AddActivationParent(Window* window) override;
   void RemoveActivationParent(Window* window) override;
   void ActivateNextWindow() override;
   void SetUnderlaySurfaceOffsetAndExtendedHitArea(
       Window* window,
       const gfx::Vector2d& offset,
       const gfx::Insets& hit_area) override;
 
+  // mojom::InputEventHandler:
+  void OnInputEvent(uint32_t window_id,
+                    std::unique_ptr<ui::Event> event,
+                    const OnInputEventCallback& callback) override;
+
   // The one int in |cursor_location_mapping_|. When we read from this
   // location, we must always read from it atomically.
   base::subtle::Atomic32* cursor_location_memory() {
     return reinterpret_cast<base::subtle::Atomic32*>(
         cursor_location_mapping_.get());
   }
 
   // This is set once and only once when we get OnEmbed(). It gives the unique
   // id for this client.
   ClientSpecificId client_id_;
@@ skipping 30 matching lines @@
 
   // A mapping to shared memory that is one 32 bit integer long. The window
   // server uses this to let us synchronously read the cursor location.
   mojo::ScopedSharedBufferMapping cursor_location_mapping_;
 
   base::ObserverList<WindowTreeClientObserver> observers_;
 
   std::unique_ptr<mojo::AssociatedBinding<mojom::WindowManager>>
       window_manager_internal_;
   mojom::WindowManagerClientAssociatedPtr window_manager_internal_client_;
+  mojo::Binding<mus::mojom::InputEventHandler> event_handler_binding_;
 
   bool has_event_observer_ = false;
 
   // Monotonically increasing ID for event observers.
   uint32_t event_observer_id_ = 0u;
 
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_CLIENT_H_