NOSUBMIT: PointerWatcher observes all pointer events, with moves optional

services/ui/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 SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_H_
 #define SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 160 matching lines @@
   // is focused.
   Window* GetFocusedWindow();
 
   // Sets focus to null. This does nothing if focus is currently null.
   void ClearFocus();
 
   // Returns the current location of the mouse on screen. Note: this method may
   // race the asynchronous initialization; but in that case we return (0, 0).
   gfx::Point GetCursorScreenPoint();
 
-  // See description in window_tree.mojom. When an existing event observer is
-  // updated or cleared then any future events from the server for that observer
+  // See description in window_tree.mojom. When an existing pointer watcher is
+  // updated or cleared then any future events from the server for that watcher
   // will be ignored.
-  void SetEventObserver(mojom::EventMatcherPtr matcher);
+  void StartPointerWatcher(bool want_moves);
+  void StopPointerWatcher();
 
   // Performs a window move. |callback| will be asynchronously called with the
   // whether the move loop completed successfully.
   void PerformWindowMove(Window* window,
                          ui::mojom::MoveLoopSource source,
                          const gfx::Point& cursor_location,
                          const base::Callback<void(bool)>& callback);
 
   // Cancels a in progress window move. (If no window is currently being moved,
   // does nothing.)
@@ skipping 212 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_;
 
-  bool has_event_observer_ = false;
+  bool has_pointer_watcher_ = false;
 
-  // Monotonically increasing ID for event observers.
-  uint32_t event_observer_id_ = 0u;
+  // Monotonically increasing ID for pointer watchers.
+  uint32_t pointer_watcher_id_ = 0u;
 
   // The current change id for the client.
   uint32_t current_move_loop_change_ = 0u;
 
   // The current change id for the window manager.
   uint32_t current_wm_move_loop_change_ = 0u;
   Id current_wm_move_loop_window_id_ = 0u;
 
   // Callback executed when a move loop initiated by PerformWindowMove() is
   // completed.
   base::Callback<void(bool)> on_current_move_finished_;
 
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_TREE_CLIENT_H_