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| 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. | |
| 4 | |
| 5 #ifndef UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_ | |
| 6 #define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_ | |
| 7 | |
| 8 #include <bitset> | |
| 9 | |
| 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" | |
| 17 | |
| 18 namespace ui { | |
| 19 | |
| 20 class TouchEvent; | |
| 21 | |
| 22 class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev | |
| 23 : public EventConverterEvdev { | |
| 24 public: | |
| 25 enum { | |
| 26 MAX_FINGERS = 11 | |
| 27 }; | |
| 28 TouchEventConverterEvdev(int fd, | |
| 29 base::FilePath path, | |
| 30 int id, | |
| 31 const EventDeviceInfo& info, | |
| 32 const EventDispatchCallback& dispatch); | |
| 33 virtual ~TouchEventConverterEvdev(); | |
| 34 | |
| 35 // EventConverterEvdev: | |
| 36 virtual bool HasTouchscreen() const override; | |
| 37 virtual gfx::Size GetTouchscreenSize() const override; | |
| 38 | |
| 39 private: | |
| 40 friend class MockTouchEventConverterEvdev; | |
| 41 | |
| 42 // Unsafe part of initialization. | |
| 43 void Init(const EventDeviceInfo& info); | |
| 44 | |
| 45 // Overidden from base::MessagePumpLibevent::Watcher. | |
| 46 virtual void OnFileCanReadWithoutBlocking(int fd) override; | |
| 47 | |
| 48 virtual bool Reinitialize(); | |
| 49 | |
| 50 void ProcessInputEvent(const input_event& input); | |
| 51 void ProcessAbs(const input_event& input); | |
| 52 void ProcessSyn(const input_event& input); | |
| 53 | |
| 54 void ReportEvents(base::TimeDelta delta); | |
| 55 | |
| 56 // Callback for dispatching events. | |
| 57 EventDispatchCallback callback_; | |
| 58 | |
| 59 // Set if we have seen a SYN_DROPPED and not yet re-synced with the device. | |
| 60 bool syn_dropped_; | |
| 61 | |
| 62 // Set if this is a type A device (uses SYN_MT_REPORT). | |
| 63 bool is_type_a_; | |
| 64 | |
| 65 // Pressure values. | |
| 66 int pressure_min_; | |
| 67 int pressure_max_; // Used to normalize pressure values. | |
| 68 | |
| 69 // Input range for x-axis. | |
| 70 float x_min_tuxels_; | |
| 71 float x_num_tuxels_; | |
| 72 | |
| 73 // Input range for y-axis. | |
| 74 float y_min_tuxels_; | |
| 75 float y_num_tuxels_; | |
| 76 | |
| 77 // Output range for x-axis. | |
| 78 float x_min_pixels_; | |
| 79 float x_num_pixels_; | |
| 80 | |
| 81 // Output range for y-axis. | |
| 82 float y_min_pixels_; | |
| 83 float y_num_pixels_; | |
| 84 | |
| 85 // Size of the touchscreen as reported by the driver. | |
| 86 gfx::Size native_size_; | |
| 87 | |
| 88 // Touch point currently being updated from the /dev/input/event* stream. | |
| 89 int current_slot_; | |
| 90 | |
| 91 // Bit field tracking which in-progress touch points have been modified | |
| 92 // without a syn event. | |
| 93 std::bitset<MAX_FINGERS> altered_slots_; | |
| 94 | |
| 95 struct InProgressEvents { | |
| 96 float x_; | |
| 97 float y_; | |
| 98 int id_; // Device reported "unique" touch point id; -1 means not active | |
| 99 int finger_; // "Finger" id starting from 0; -1 means not active | |
| 100 | |
| 101 EventType type_; | |
| 102 float radius_x_; | |
| 103 float radius_y_; | |
| 104 float pressure_; | |
| 105 }; | |
| 106 | |
| 107 // In-progress touch points. | |
| 108 InProgressEvents events_[MAX_FINGERS]; | |
| 109 | |
| 110 DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev); | |
| 111 }; | |
| 112 | |
| 113 } // namespace ui | |
| 114 | |
| 115 #endif // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_ | |
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