chromeos: converts observed pointer events to DIPs

services/ui/ws/window_manager_state.h

 // Copyright 2016 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_WS_WINDOW_MANAGER_STATE_H_
 #define SERVICES_UI_WS_WINDOW_MANAGER_STATE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 74 matching lines @@
   // not be exposed.
   EventDispatcher* event_dispatcher() { return &event_dispatcher_; }
 
   // Returns true if this is the WindowManager of the active user.
   bool IsActive() const;
 
   void Activate(const gfx::Point& mouse_location_on_screen);
   void Deactivate();
 
   // Processes an event from PlatformDisplay.
-  void ProcessEvent(const ui::Event& event);
+  void ProcessEvent(const Event& event, int64_t display_id);
 
   // Called when the ack from an event dispatched to WindowTree |tree| is
   // received.
   // TODO(sky): make this private and use a callback.
   void OnEventAck(mojom::WindowTree* tree, mojom::EventResult result);
 
   // Called when the WindowManager acks an accelerator.
   void OnAcceleratorAck(mojom::EventResult result);
 
  private:
   class ProcessedEventTarget;
   friend class Display;
   friend class test::WindowManagerStateTestApi;
 
   // Set of display roots. This is a vector rather than a set to support removal
   // without deleting.
   using WindowManagerDisplayRoots =
       std::vector<std::unique_ptr<WindowManagerDisplayRoot>>;
 
   enum class DebugAcceleratorType {
     PRINT_WINDOWS,
   };
 
   struct DebugAccelerator {
-    bool Matches(const ui::KeyEvent& event) const;
+    bool Matches(const KeyEvent& event) const;
 
     DebugAcceleratorType type;
-    ui::KeyboardCode key_code;
+    KeyboardCode key_code;
     int event_flags;
   };
 
   enum class EventDispatchPhase {
     // Not actively dispatching.
     NONE,
 
     // A PRE_TARGET accelerator has been encountered and we're awaiting the ack.
     PRE_TARGET_ACCELERATOR,
 
     // Dispatching to the target, awaiting the ack.
     TARGET,
   };
 
   // There are two types of events that may be queued, both occur only when
   // waiting for an ack from a client.
   // . We get an event from the PlatformDisplay. This results in |event| being
   //   set, but |processed_target| is null.
   // . We get an event from the EventDispatcher. In this case both |event| and
   //   |processed_target| are valid.
   // The second case happens if EventDispatcher generates more than one event
   // at a time.
   struct QueuedEvent {
     QueuedEvent();
     ~QueuedEvent();
 
-    std::unique_ptr<ui::Event> event;
+    std::unique_ptr<Event> event;
     std::unique_ptr<ProcessedEventTarget> processed_target;
+    int64_t display_id;
+  };
+
+  // Tracks state associated with an event being dispatched to a client.
+  struct InFlightEventDetails {
+    InFlightEventDetails(WindowTree* tree,
+                         int64_t display_id,
+                         const Event& event,
+                         EventDispatchPhase phase);
+    ~InFlightEventDetails();
+
+    base::OneShotTimer timer;
+    WindowTree* tree;
+    int64_t display_id;
+    std::unique_ptr<Event> event;
+    EventDispatchPhase phase;
   };
 
   const WindowServer* window_server() const;
   WindowServer* window_server();
 
   DisplayManager* display_manager();
   const DisplayManager* display_manager() const;
 
   // Adds |display_root| to the set of WindowManagerDisplayRoots owned by this
   // WindowManagerState.
   void AddWindowManagerDisplayRoot(
       std::unique_ptr<WindowManagerDisplayRoot> display_root);
 
   // Called when a Display is deleted.
   void OnDisplayDestroying(Display* display);
 
   // Sets the visibility of all window manager roots windows to |value|.
   void SetAllRootWindowsVisible(bool value);
 
   // Returns the ServerWindow that is the root of the WindowManager for
   // |window|. |window| corresponds to the root of a Display.
   ServerWindow* GetWindowManagerRoot(ServerWindow* window);
 
   // Called if the client doesn't ack an event in the appropriate amount of
   // time.
   void OnEventAckTimeout(ClientSpecificId client_id);
 
   // Implemenation of processing an event with a match phase of all. This
   // handles debug accelerators and forwards to EventDispatcher.
-  void ProcessEventImpl(const ui::Event& event);
+  void ProcessEventImpl(const Event& event, int64_t display_id);
 
   // Schedules an event to be processed later.
-  void QueueEvent(const ui::Event& event,
-                  std::unique_ptr<ProcessedEventTarget> processed_event_target);
+  void QueueEvent(const Event& event,
+                  std::unique_ptr<ProcessedEventTarget> processed_event_target,
+                  int64_t display_id);
 
   // Processes the next valid event in |event_queue_|. If the event has already
   // been processed it is dispatched, otherwise the event is passed to the
   // EventDispatcher for processing.
   void ProcessNextEventFromQueue();
 
   // Dispatches the event to the appropriate client and starts the ack timer.
   void DispatchInputEventToWindowImpl(ServerWindow* target,
                                       ClientSpecificId client_id,
-                                      const ui::Event& event,
+                                      const Event& event,
                                       base::WeakPtr<Accelerator> accelerator);
 
   // Registers accelerators used internally for debugging.
   void AddDebugAccelerators();
 
   // Finds the debug accelerator for |event| and if one is found calls
   // HandleDebugAccelerator().
-  void ProcessDebugAccelerator(const ui::Event& event);
+  void ProcessDebugAccelerator(const Event& event);
 
   // Runs the specified debug accelerator.
   void HandleDebugAccelerator(DebugAcceleratorType type);
 
   // Called when waiting for an event or accelerator to be processed by |tree|.
-  void ScheduleInputEventTimeout(WindowTree* tree);
+  void ScheduleInputEventTimeout(WindowTree* tree,
+                                 ServerWindow* target,
+                                 const Event& event,
+                                 EventDispatchPhase phase);
 
   // EventDispatcherDelegate:
   void OnAccelerator(uint32_t accelerator_id,
-                     const ui::Event& event,
+                     const Event& event,
                      AcceleratorPhase phase) override;
   void SetFocusedWindowFromEventDispatcher(ServerWindow* window) override;
   ServerWindow* GetFocusedWindowForEventDispatcher() override;
   void SetNativeCapture(ServerWindow* window) override;
   void ReleaseNativeCapture() override;
   void UpdateNativeCursorFromDispatcher() override;
   void OnCaptureChanged(ServerWindow* new_capture,
                         ServerWindow* old_capture) override;
   void OnMouseCursorLocationChanged(const gfx::Point& point) override;
   void DispatchInputEventToWindow(ServerWindow* target,
                                   ClientSpecificId client_id,
-                                  const ui::Event& event,
+                                  const Event& event,
                                   Accelerator* accelerator) override;
   ClientSpecificId GetEventTargetClientId(const ServerWindow* window,
                                           bool in_nonclient_area) override;
   ServerWindow* GetRootWindowContaining(gfx::Point* location) override;
-  void OnEventTargetNotFound(const ui::Event& event) override;
+  void OnEventTargetNotFound(const Event& event) override;
 
   // ServerWindowObserver:
   void OnWindowEmbeddedAppDisconnected(ServerWindow* window) override;
 
   // The single WindowTree this WindowManagerState is associated with.
   // |window_tree_| owns this.
   WindowTree* window_tree_;
 
   // Set to true the first time SetFrameDecorationValues() is called.
   bool got_frame_decoration_values_ = false;
   mojom::FrameDecorationValuesPtr frame_decoration_values_;
 
-  EventDispatchPhase event_dispatch_phase_ = EventDispatchPhase::NONE;
-  // The tree we're waiting to process the current accelerator or event.
-  WindowTree* tree_awaiting_input_ack_ = nullptr;
-  // The event we're awaiting an accelerator or input ack from.
-  std::unique_ptr<ui::Event> event_awaiting_input_ack_;
   base::WeakPtr<Accelerator> post_target_accelerator_;
   std::queue<std::unique_ptr<QueuedEvent>> event_queue_;
-  base::OneShotTimer event_ack_timer_;
 
   std::vector<DebugAccelerator> debug_accelerators_;
 
+  // If non-null we're actively waiting for a response from a client for an
+  // event.
+  std::unique_ptr<InFlightEventDetails> in_flight_event_details_;
+
   EventDispatcher event_dispatcher_;
 
   // PlatformDisplay that currently has capture.
   PlatformDisplay* platform_display_with_capture_ = nullptr;
 
   // All the active WindowManagerDisplayRoots.
   WindowManagerDisplayRoots window_manager_display_roots_;
 
+  // Id of the display the current event being processed originated from.
+  int64_t event_processing_display_id_ = 0;
+
   // Set of WindowManagerDisplayRoots corresponding to Displays that have been
   // destroyed. WindowManagerDisplayRoots are not destroyed immediately when
   // the Display is destroyed to allow the client to destroy the window when it
   // wants to. Once the client destroys the window WindowManagerDisplayRoots is
   // destroyed.
   WindowManagerDisplayRoots orphaned_window_manager_display_roots_;
 
   base::WeakPtrFactory<WindowManagerState> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerState);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_WINDOW_MANAGER_STATE_H_