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#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_ALT = 1 << 0,
KEYBOARD_MODKEY_SUPER = 1 << 1,
KEYBOARD_MODKEY_CTRL = 1 << 2,
KEYBOARD_MODKEY_SHIFT = 1 << 3
} keyboard_modkeys;
typedef enum {
KEYBOARD_BUTTON_RELEASED,
KEYBOARD_BUTTON_PRESSED
} keyboard_button_state;
typedef struct {
struct pollfd event_polls[MAX_EVENT_POLLS]; /* Current size is |num_event_polls| */
int dev_input_ids[MAX_EVENT_POLLS]; /* Current size is |num_event_polls| */
int num_event_polls;
int stdout_event_index;
int hotplug_event_index;
bool stdout_failed;
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 */
typedef void (*key_callback)(uint32_t key, uint32_t modifiers, int press_status, void *userdata);
bool keyboard_event_init(keyboard_event *self, bool poll_stdout_error);
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(keyboard_event *self);
#endif /* KEYBOARD_EVENT_H */
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