Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/devices/x11/touch_factory_x11.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 UI_EVENTS_PLATFORM_X11_TOUCH_FACTORY_X11_H_
-#define UI_EVENTS_PLATFORM_X11_TOUCH_FACTORY_X11_H_
+#ifndef UI_EVENTS_DEVICES_X11_TOUCH_FACTORY_X11_H_
+#define UI_EVENTS_DEVICES_X11_TOUCH_FACTORY_X11_H_
 
 #include <bitset>
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
 
-#include "base/timer/timer.h"
-#include "ui/events/events_base_export.h"
+#include "ui/events/devices/events_devices_export.h"
 #include "ui/gfx/sequential_id_generator.h"
 
-template <typename T>
-struct DefaultSingletonTraits;
+template <typename T> struct DefaultSingletonTraits;
 
 typedef unsigned long Cursor;
 typedef unsigned long Window;
 typedef struct _XDisplay Display;
 typedef union _XEvent XEvent;
 
 namespace ui {
 
 // Functions related to determining touch devices.
-class EVENTS_BASE_EXPORT TouchFactory {
+class EVENTS_DEVICES_EXPORT TouchFactory {
  private:
   TouchFactory();
   ~TouchFactory();
 
  public:
   // Returns the TouchFactory singleton.
   static TouchFactory* GetInstance();
 
   // Sets the touch devices from the command line.
   static void SetTouchDeviceListFromCommandLine();
 
   // Updates the list of devices.
   void UpdateDeviceList(Display* display);
 
   // Checks whether an XI2 event should be processed or not (i.e. if the event
   // originated from a device we are interested in).
   bool ShouldProcessXI2Event(XEvent* xevent);
 
   // Setup an X Window for XInput2 events.
   void SetupXI2ForXWindow(::Window xid);
 
   // Keeps a list of touch devices so that it is possible to determine if a
   // pointer event is a touch-event or a mouse-event. The list is reset each
   // time this is called.
-  void SetTouchDeviceList(const std::vector<unsigned int>& devices);
+  void SetTouchDeviceList(const std::vector<int>& devices);
+
+  // Is the device ID valid?
+  bool IsValidDevice(int deviceid) const;
 
   // Is the device a touch-device?
-  bool IsTouchDevice(unsigned int deviceid) const;
+  bool IsTouchDevice(int deviceid) const;
 
   // Is the device a real multi-touch-device? (see doc. for |touch_device_list_|
   // below for more explanation.)
-  bool IsMultiTouchDevice(unsigned int deviceid) const;
+  bool IsMultiTouchDevice(int deviceid) const;
 
   // Tries to find an existing slot ID mapping to tracking ID. Returns true
   // if the slot is found and it is saved in |slot|, false if no such slot
   // can be found.
   bool QuerySlotForTrackingID(uint32 tracking_id, int* slot);
 
   // Tries to find an existing slot ID mapping to tracking ID. If there
   // isn't one already, allocates a new slot ID and sets up the mapping.
   int GetSlotForTrackingID(uint32 tracking_id);
 
-  // Increases the number of times |ReleaseSlotForTrackingID| needs to be called
-  // on a given tracking id before it will actually be released.
-  void AcquireSlotForTrackingID(uint32 tracking_id);
-
   // Releases the slot ID mapping to tracking ID.
   void ReleaseSlotForTrackingID(uint32 tracking_id);
 
   // Whether any touch device is currently present and enabled.
   bool IsTouchDevicePresent();
 
   // Pairs of <vendor id, product id> of external touch screens.
-  const std::set<std::pair<int, int>>& GetTouchscreenIds() const {
+  const std::set<std::pair<int, int> >& GetTouchscreenIds() const {
     return touchscreen_ids_;
   }
 
-  // Return maximum simultaneous touch points supported by device.
-  int GetMaxTouchPoints() const;
-
   // Resets the TouchFactory singleton.
   void ResetForTest();
 
   // Sets up the device id in the list |devices| as multi-touch capable
   // devices and enables touch events processing. This function is only
   // for test purpose, and it does not query from X server.
-  void SetTouchDeviceForTest(const std::vector<unsigned int>& devices);
+  void SetTouchDeviceForTest(const std::vector<int>& devices);
 
   // Sets up the device id in the list |devices| as pointer devices.
   // This function is only for test purpose, and it does not query from
   // X server.
-  void SetPointerDeviceForTest(const std::vector<unsigned int>& devices);
+  void SetPointerDeviceForTest(const std::vector<int>& devices);
 
  private:
   // Requirement for Singleton
   friend struct DefaultSingletonTraits<TouchFactory>;
 
-  void CacheTouchscreenIds(Display* display, int id);
+  void CacheTouchscreenIds(int id);
 
   // NOTE: To keep track of touch devices, we currently maintain a lookup table
   // to quickly decide if a device is a touch device or not. We also maintain a
   // list of the touch devices. Ideally, there will be only one touch device,
   // and instead of having the lookup table and the list, there will be a single
   // identifier for the touch device. This can be completed after enough testing
   // on real touch devices.
 
   static const int kMaxDeviceNum = 128;
 
   // A quick lookup table for determining if events from the pointer device
   // should be processed.
   std::bitset<kMaxDeviceNum> pointer_device_lookup_;
 
   // A quick lookup table for determining if a device is a touch device.
   std::bitset<kMaxDeviceNum> touch_device_lookup_;
 
   // Indicates whether touch events are explicitly disabled.
   bool touch_events_disabled_;
 
   // The list of touch devices. For testing/debugging purposes, a single-pointer
   // device (mouse or touch screen without sufficient X/driver support for MT)
   // can sometimes be treated as a touch device. The key in the map represents
   // the device id, and the value represents if the device is multi-touch
   // capable.
   std::map<int, bool> touch_device_list_;
 
   // Touch screen <vid, pid>s.
-  std::set<std::pair<int, int>> touchscreen_ids_;
-
-  // Maps from a tracking id to the number of times |ReleaseSlotForTrackingID|
-  // must be called before the tracking id is released.
-  std::map<uint32, int> tracking_id_refcounts_;
-
-  // Maximum simultaneous touch points supported by device. In the case of
-  // devices with multiple digitizers (e.g. multiple touchscreens), the value
-  // is the maximum of the set of maximum supported contacts by each individual
-  // digitizer.
-  int max_touch_points_;
+  std::set<std::pair<int, int> > touchscreen_ids_;
 
   // Device ID of the virtual core keyboard.
   int virtual_core_keyboard_device_;
 
   SequentialIDGenerator id_generator_;
 
+  // Associate each device ID with its master device ID.
+  std::map<int, int> device_master_id_list_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchFactory);
 };
 
 }  // namespace ui
 
-#endif  // UI_EVENTS_PLATFORM_X11_TOUCH_FACTORY_X11_H_
+#endif  // UI_EVENTS_DEVICES_X11_TOUCH_FACTORY_X11_H_