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/ozone/evdev/event_converter_evdev.h"
15 #include "ui/events/ozone/evdev/event_device_info.h"
16 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
22 class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev
23 : public EventConverterEvdev {
28 TouchEventConverterEvdev(int fd,
31 const EventDeviceInfo& info,
32 const EventDispatchCallback& dispatch);
33 ~TouchEventConverterEvdev() override;
35 // EventConverterEvdev:
36 bool HasTouchscreen() const override;
37 gfx::Size GetTouchscreenSize() const override;
38 bool IsInternal() const override;
41 friend class MockTouchEventConverterEvdev;
43 // Unsafe part of initialization.
44 void Init(const EventDeviceInfo& info);
46 // Overidden from base::MessagePumpLibevent::Watcher.
47 void OnFileCanReadWithoutBlocking(int fd) override;
49 virtual bool Reinitialize();
51 void ProcessInputEvent(const input_event& input);
52 void ProcessAbs(const input_event& input);
53 void ProcessSyn(const input_event& input);
55 void ReportEvents(base::TimeDelta delta);
57 // Callback for dispatching events.
58 EventDispatchCallback callback_;
60 // Set if we have seen a SYN_DROPPED and not yet re-synced with the device.
63 // Set if this is a type A device (uses SYN_MT_REPORT).
68 int pressure_max_; // Used to normalize pressure values.
70 // Input range for x-axis.
74 // Input range for y-axis.
78 // Output range for x-axis.
82 // Output range for y-axis.
86 // Size of the touchscreen as reported by the driver.
87 gfx::Size native_size_;
89 // Touch point currently being updated from the /dev/input/event* stream.
92 // Bit field tracking which in-progress touch points have been modified
93 // without a syn event.
94 std::bitset<MAX_FINGERS> altered_slots_;
96 struct InProgressEvents {
101 int id_; // Device reported "unique" touch point id; -1 means not active
102 int finger_; // "Finger" id starting from 0; -1 means not active
110 // In-progress touch points.
111 InProgressEvents events_[MAX_FINGERS];
115 DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
120 #endif // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_