1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
#ifndef KEYBOARD_EVENT_H
#define KEYBOARD_EVENT_H
/* Read keyboard input from linux /dev/input/eventN devices, with hotplug support */
#include "hotplug.h"
/* C stdlib */
#include <stdbool.h>
#include <stdint.h>
/* POSIX */
#include <sys/poll.h>
/* LINUX */
#include <linux/input-event-codes.h>
#define MAX_EVENT_POLLS 32
typedef enum {
KEYBOARD_MODKEY_LALT = 1 << 0,
KEYBOARD_MODKEY_RALT = 1 << 2,
KEYBOARD_MODKEY_SUPER = 1 << 3,
KEYBOARD_MODKEY_CTRL = 1 << 4,
KEYBOARD_MODKEY_SHIFT = 1 << 5
} keyboard_modkeys;
typedef enum {
KEYBOARD_BUTTON_RELEASED,
KEYBOARD_BUTTON_PRESSED
} keyboard_button_state;
typedef struct {
int dev_input_id;
bool grabbed;
unsigned char *key_states;
int num_keys_pressed;
} event_extra_data;
typedef enum {
KEYBOARD_GRAB_TYPE_ALL,
KEYBOARD_GRAB_TYPE_VIRTUAL
} keyboard_grab_type;
typedef struct {
struct pollfd event_polls[MAX_EVENT_POLLS]; /* Current size is |num_event_polls| */
event_extra_data event_extra_data[MAX_EVENT_POLLS]; /* Current size is |num_event_polls| */
int num_event_polls;
int stdout_event_index;
int hotplug_event_index;
int uinput_fd;
bool stdout_failed;
keyboard_grab_type grab_type;
hotplug_event hotplug_ev;
keyboard_button_state lshift_button_state;
keyboard_button_state rshift_button_state;
keyboard_button_state lctrl_button_state;
keyboard_button_state rctrl_button_state;
keyboard_button_state lalt_button_state;
keyboard_button_state ralt_button_state;
keyboard_button_state lmeta_button_state;
keyboard_button_state rmeta_button_state;
} keyboard_event;
/* |key| is a KEY_ from linux/input-event-codes.h. |modifiers| is a bitmask of keyboard_modkeys. |press_status| is 0 for released, 1 for pressed and 2 for repeat */
/* Return true to allow other applications to receive the key input (when using exclusive grab) */
typedef bool (*key_callback)(uint32_t key, uint32_t modifiers, int press_status, void *userdata);
bool keyboard_event_init(keyboard_event *self, bool poll_stdout_error, bool exclusive_grab, keyboard_grab_type grab_type);
void keyboard_event_deinit(keyboard_event *self);
/* If |timeout_milliseconds| is -1 then wait until an event is received */
void keyboard_event_poll_events(keyboard_event *self, int timeout_milliseconds, key_callback callback, void *userdata);
bool keyboard_event_stdout_has_failed(const keyboard_event *self);
#endif /* KEYBOARD_EVENT_H */
|
