ozone: evdev: Add gesture property provider

ui/events/ozone/evdev/event_factory_evdev.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 UI_EVENTS_OZONE_EVDEV_EVENT_FACTORY_EVDEV_H_
 #define UI_EVENTS_OZONE_EVDEV_EVENT_FACTORY_EVDEV_H_
 
+#include <set>
+
 #include "base/callback.h"
 #include "base/compiler_specific.h"
+#include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/task_runner.h"
 #include "ui/events/ozone/device/device_event_observer.h"
 #include "ui/events/ozone/evdev/event_converter_evdev.h"
 #include "ui/events/ozone/evdev/event_modifiers_evdev.h"
 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class PointF;
 }  // namespace gfx
 
 namespace ui {
 
 class CursorDelegateEvdev;
 class DeviceManager;
 
+#if defined(USE_EVDEV_GESTURES)
+class GesturePropertyProvider;
+#endif
+
 // Ozone events implementation for the Linux input subsystem ("evdev").
 class EVENTS_OZONE_EVDEV_EXPORT EventFactoryEvdev : public DeviceEventObserver,
                                                     public PlatformEventSource {
  public:
   EventFactoryEvdev(CursorDelegateEvdev* cursor,
                     DeviceManager* device_manager);
   virtual ~EventFactoryEvdev();
 
   void DispatchUiEvent(Event* event);
 
   void WarpCursorTo(gfx::AcceleratedWidget widget,
                     const gfx::PointF& location);
 
  private:
+  // Mapping table from a device path to its device id.
+  typedef base::hash_map<base::FilePath, int> DeviceIdMap;
+
   // Open device at path & starting processing events (on UI thread).
   void AttachInputDevice(scoped_ptr<EventConverterEvdev> converter);
 
   // Close device at path (on UI thread).
   void DetachInputDevice(const base::FilePath& file_path);
 
   void NotifyHotplugEventObserver(const EventConverterEvdev& converter);
 
-  int NextDeviceId();
+  int GenerateDeviceId(const base::FilePath& file_path);
+
+  void RevokeDeviceId(const base::FilePath& file_path);
 
   // DeviceEventObserver overrides:
   //
   // Callback for device add (on UI thread).
   virtual void OnDeviceEvent(const DeviceEvent& event) override;
 
   // PlatformEventSource:
   virtual void OnDispatcherListChanged() override;
 
   // Owned per-device event converters (by path).
   std::map<base::FilePath, EventConverterEvdev*> converters_;
 
-  // Used to uniquely identify input devices.
-  int last_device_id_;
+  // An incremental counter of the next device id to be used for mapping. Used
+  // to uniquely identify input devices.
+  int device_id_counter_;
+
+  // A set of all currently used device ids.
+  std::set<int> used_device_ids_;
+
+  // Map from device paths to device ids.
+  DeviceIdMap device_ids_map_;

[spang, 2014/10/15 11:36:41]

What is this for? I don't think you need it.

[Shecky Lin, 2014/10/16 04:53:53]

Done.

 
   // Interface for scanning & monitoring input devices.
   DeviceManager* device_manager_;  // Not owned.
 
   // Task runner for event dispatch.
   scoped_refptr<base::TaskRunner> ui_task_runner_;
 
   // Modifier key state (shift, ctrl, etc).
   EventModifiersEvdev modifiers_;
 
   // Cursor movement.
   CursorDelegateEvdev* cursor_;
 
+#if defined(USE_EVDEV_GESTURES)
+  // Gesture library property provider (used by touchpads/mice).
+  scoped_ptr<GesturePropertyProvider> gesture_property_provider_;
+#endif
+
   // Dispatch callback for events.
   EventDispatchCallback dispatch_callback_;
 
   // Support weak pointers for attach & detach callbacks.
   base::WeakPtrFactory<EventFactoryEvdev> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EventFactoryEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_EVENT_FACTORY_EVDEV_H_