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

ui/events/ozone/evdev/touch_event_converter_evdev.h

Index: ui/events/ozone/evdev/touch_event_converter_evdev.h
diff --git a/ui/events/ozone/evdev/touch_event_converter_evdev.h b/ui/events/ozone/evdev/touch_event_converter_evdev.h
new file mode 100644
index 0000000000000000000000000000000000000000..80938beffb8f9fa4b96eb6a38d0ad8428ca05d6a
--- /dev/null
+++ b/ui/events/ozone/evdev/touch_event_converter_evdev.h
@@ -0,0 +1,122 @@
+// 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_TOUCH_EVENT_CONVERTER_EVDEV_H_
+#define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
+
+#include <bitset>
+
+#include "base/compiler_specific.h"
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_pump_libevent.h"
+#include "ui/events/event_constants.h"
+#include "ui/events/ozone/evdev/event_converter_evdev.h"
+#include "ui/events/ozone/evdev/event_device_info.h"
+#include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
+
+namespace ui {
+
+class DeviceEventDispatcherEvdev;
+class TouchEvent;
+class TouchNoiseFinder;
+struct InProgressTouchEvdev;
+
+class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev
+    : public EventConverterEvdev {
+ public:
+  TouchEventConverterEvdev(int fd,
+                           base::FilePath path,
+                           int id,
+                           InputDeviceType type,
+                           const EventDeviceInfo& devinfo,
+                           DeviceEventDispatcherEvdev* dispatcher);
+  ~TouchEventConverterEvdev() override;
+
+  // EventConverterEvdev:
+  bool HasTouchscreen() const override;
+  gfx::Size GetTouchscreenSize() const override;
+  int GetTouchPoints() const override;
+  void OnEnabled() override;
+  void OnDisabled() override;
+
+  // Unsafe part of initialization.
+  virtual void Initialize(const EventDeviceInfo& info);
+
+ private:
+  friend class MockTouchEventConverterEvdev;
+
+  // Overidden from base::MessagePumpLibevent::Watcher.
+  void OnFileCanReadWithoutBlocking(int fd) override;
+
+  virtual void Reinitialize();
+
+  void ProcessMultitouchEvent(const input_event& input);
+  void EmulateMultitouchEvent(const input_event& input);
+  void ProcessKey(const input_event& input);
+  void ProcessAbs(const input_event& input);
+  void ProcessSyn(const input_event& input);
+
+  // Returns an EventType to dispatch for |touch|. Returns ET_UNKNOWN if an
+  // event should not be dispatched.
+  EventType GetEventTypeForTouch(const InProgressTouchEvdev& touch);
+
+  void ReportEvent(const InProgressTouchEvdev& event,
+                   EventType event_type,
+                   const base::TimeDelta& delta);
+  void ReportEvents(base::TimeDelta delta);
+
+  void UpdateTrackingId(int slot, int tracking_id);
+  void ReleaseTouches();
+
+  // Normalize pressure value to [0, 1].
+  float ScalePressure(int32_t value);
+
+  int NextTrackingId();
+
+  // Dispatcher for events.
+  DeviceEventDispatcherEvdev* dispatcher_;
+
+  // Set if we drop events in kernel (SYN_DROPPED) or in process.
+  bool dropped_events_ = false;
+
+  // Device has multitouch capability.
+  bool has_mt_ = false;
+
+  // Use BTN_LEFT instead of BT_TOUCH.
+  bool quirk_left_mouse_button_ = false;
+
+  // Pressure values.
+  int pressure_min_;
+  int pressure_max_;  // Used to normalize pressure values.
+
+  // Input range for x-axis.
+  float x_min_tuxels_;
+  float x_num_tuxels_;
+
+  // Input range for y-axis.
+  float y_min_tuxels_;
+  float y_num_tuxels_;
+
+  // Number of touch points reported by driver
+  int touch_points_ = 0;
+
+  // Tracking id counter.
+  int next_tracking_id_ = 0;
+
+  // Touch point currently being updated from the /dev/input/event* stream.
+  size_t current_slot_ = 0;
+
+  // In-progress touch points.
+  std::vector<InProgressTouchEvdev> events_;
+
+  // Finds touch noise.
+  scoped_ptr<TouchNoiseFinder> touch_noise_finder_;
+
+  DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_