1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
6 #define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
10 #include "base/compiler_specific.h"
11 #include "base/files/file_path.h"
12 #include "base/message_loop/message_pump_libevent.h"
13 #include "ui/events/event_constants.h"
14 #include "ui/events/events_export.h"
15 #include "ui/events/ozone/evdev/event_converter_evdev.h"
16 #include "ui/events/ozone/evdev/event_device_info.h"
22 class EVENTS_EXPORT TouchEventConverterEvdev
23 : public EventConverterEvdev,
24 public base::MessagePumpLibevent::Watcher {
29 TouchEventConverterEvdev(int fd,
31 const EventDeviceInfo& info,
32 const EventDispatchCallback& dispatch);
33 virtual ~TouchEventConverterEvdev();
35 // Start & stop watching for events.
36 virtual void Start() OVERRIDE;
37 virtual void Stop() OVERRIDE;
40 friend class MockTouchEventConverterEvdev;
42 // Unsafe part of initialization.
43 void Init(const EventDeviceInfo& info);
45 // Overidden from base::MessagePumpLibevent::Watcher.
46 virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
47 virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
49 virtual bool Reinitialize();
51 // Set if we have seen a SYN_DROPPED and not yet re-synced with the device.
54 // Set if this is a type A device (uses SYN_MT_REPORT).
59 int pressure_max_; // Used to normalize pressure values.
61 // Input range for x-axis.
65 // Input range for y-axis.
69 // Output range for x-axis.
73 // Output range for y-axis.
77 // Touch point currently being updated from the /dev/input/event* stream.
80 // File descriptor for the /dev/input/event* instance.
83 // Path to input device.
86 // Bit field tracking which in-progress touch points have been modified
87 // without a syn event.
88 std::bitset<MAX_FINGERS> altered_slots_;
90 struct InProgressEvents {
93 int id_; // Device reported "unique" touch point id; -1 means not active
94 int finger_; // "Finger" id starting from 0; -1 means not active
101 // In-progress touch points.
102 InProgressEvents events_[MAX_FINGERS];
104 // Controller for watching the input fd.
105 base::MessagePumpLibevent::FileDescriptorWatcher controller_;
107 DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
112 #endif // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_