1 // Copyright 2013 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_EVENT_DEVICE_INFO_H_
6 #define UI_EVENTS_OZONE_EVDEV_EVENT_DEVICE_INFO_H_
9 #include <linux/input.h>
13 #include "base/basictypes.h"
14 #include "ui/events/ozone/evdev/event_device_util.h"
15 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
17 // ABS_MT_SLOT isn't valid options for EVIOCGMTSLOTS ioctl.
18 #define EVDEV_ABS_MT_COUNT (ABS_MAX - ABS_MT_SLOT - 1)
22 // Device information for Linux input devices
24 // This stores and queries information about input devices; in
25 // particular it knows which events the device can generate.
26 class EVENTS_OZONE_EVDEV_EXPORT EventDeviceInfo {
31 // Initialize device information from an open device.
32 bool Initialize(int fd);
34 // Check events this device can generate.
35 bool HasEventType(unsigned int type) const;
36 bool HasKeyEvent(unsigned int code) const;
37 bool HasRelEvent(unsigned int code) const;
38 bool HasAbsEvent(unsigned int code) const;
39 bool HasMscEvent(unsigned int code) const;
40 bool HasSwEvent(unsigned int code) const;
41 bool HasLedEvent(unsigned int code) const;
43 // Properties of absolute axes.
44 int32 GetAbsMinimum(unsigned int code) const;
45 int32 GetAbsMaximum(unsigned int code) const;
46 int32 GetSlotValue(unsigned int code, unsigned int slot) const;
48 // Check input device properties.
49 bool HasProp(unsigned int code) const;
51 // Has absolute X & Y axes.
52 bool HasAbsXY() const;
54 // Has relativeX & Y axes.
55 bool HasRelXY() const;
57 // Determine whether absolute device X/Y coordinates are mapped onto the
58 // screen. This is the case for touchscreens and tablets but not touchpads.
59 bool IsMappedToScreen() const;
62 // Return the slot vector in |slot_values_| for |code|.
63 const std::vector<int32_t>& GetMtSlotsForCode(int code) const;
65 unsigned long ev_bits_[EVDEV_BITS_TO_LONGS(EV_CNT)];
66 unsigned long key_bits_[EVDEV_BITS_TO_LONGS(KEY_CNT)];
67 unsigned long rel_bits_[EVDEV_BITS_TO_LONGS(REL_CNT)];
68 unsigned long abs_bits_[EVDEV_BITS_TO_LONGS(ABS_CNT)];
69 unsigned long msc_bits_[EVDEV_BITS_TO_LONGS(MSC_CNT)];
70 unsigned long sw_bits_[EVDEV_BITS_TO_LONGS(SW_CNT)];
71 unsigned long led_bits_[EVDEV_BITS_TO_LONGS(LED_CNT)];
72 unsigned long prop_bits_[EVDEV_BITS_TO_LONGS(INPUT_PROP_CNT)];
74 struct input_absinfo abs_info_[ABS_CNT];
76 // Store the values for the multi-touch properties for each slot.
77 std::vector<int32_t> slot_values_[EVDEV_ABS_MT_COUNT];
79 DISALLOW_COPY_AND_ASSIGN(EventDeviceInfo);
84 #endif // UI_EVENTS_OZONE_EVDEV_EVENT_DEVICE_INFO_H_