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https://repo.dec05eba.com/gpu-screen-recorder-ui
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101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
#ifndef KEYBOARD_EVENT_H
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#define KEYBOARD_EVENT_H
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/* Read keyboard input from linux /dev/input/eventN devices, with hotplug support */
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#include "hotplug.h"
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/* C stdlib */
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#include <stdbool.h>
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#include <stdint.h>
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/* POSIX */
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#include <sys/poll.h>
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/* LINUX */
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#include <linux/input-event-codes.h>
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#define MAX_EVENT_POLLS 32
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typedef struct {
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union {
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int type;
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unsigned char data[192];
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};
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} XEvent;
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typedef unsigned long (*XKeycodeToKeysym_FUNC)(void *display, unsigned char keycode, int index);
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typedef int (*XPending_FUNC)(void *display);
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typedef int (*XNextEvent_FUNC)(void *display, XEvent *event_return);
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typedef int (*XRefreshKeyboardMapping_FUNC)(void* event_map);
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typedef struct {
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void *display;
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XKeycodeToKeysym_FUNC XKeycodeToKeysym;
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XPending_FUNC XPending;
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XNextEvent_FUNC XNextEvent;
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XRefreshKeyboardMapping_FUNC XRefreshKeyboardMapping;
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} x11_context;
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typedef enum {
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KEYBOARD_MODKEY_LALT = 1 << 0,
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KEYBOARD_MODKEY_RALT = 1 << 2,
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KEYBOARD_MODKEY_SUPER = 1 << 3,
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KEYBOARD_MODKEY_CTRL = 1 << 4,
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KEYBOARD_MODKEY_SHIFT = 1 << 5
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} keyboard_modkeys;
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typedef enum {
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KEYBOARD_BUTTON_RELEASED,
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KEYBOARD_BUTTON_PRESSED
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} keyboard_button_state;
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typedef struct {
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int dev_input_id;
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bool grabbed;
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unsigned char *key_states;
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int num_keys_pressed;
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} event_extra_data;
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typedef enum {
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KEYBOARD_GRAB_TYPE_ALL,
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KEYBOARD_GRAB_TYPE_VIRTUAL
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} keyboard_grab_type;
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typedef struct {
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struct pollfd event_polls[MAX_EVENT_POLLS]; /* Current size is |num_event_polls| */
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event_extra_data event_extra_data[MAX_EVENT_POLLS]; /* Current size is |num_event_polls| */
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int num_event_polls;
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int stdout_event_index;
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int hotplug_event_index;
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int uinput_fd;
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bool stdout_failed;
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keyboard_grab_type grab_type;
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x11_context x_context;
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hotplug_event hotplug_ev;
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keyboard_button_state lshift_button_state;
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keyboard_button_state rshift_button_state;
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keyboard_button_state lctrl_button_state;
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keyboard_button_state rctrl_button_state;
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keyboard_button_state lalt_button_state;
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keyboard_button_state ralt_button_state;
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keyboard_button_state lmeta_button_state;
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keyboard_button_state rmeta_button_state;
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} keyboard_event;
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/* |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 */
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/* Return true to allow other applications to receive the key input (when using exclusive grab) */
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typedef bool (*key_callback)(uint32_t key, uint32_t modifiers, int press_status, void *userdata);
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bool keyboard_event_init(keyboard_event *self, bool poll_stdout_error, bool exclusive_grab, keyboard_grab_type grab_type, x11_context x_context);
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void keyboard_event_deinit(keyboard_event *self);
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/* If |timeout_milliseconds| is -1 then wait until an event is received */
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void keyboard_event_poll_events(keyboard_event *self, int timeout_milliseconds, key_callback callback, void *userdata);
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bool keyboard_event_stdout_has_failed(const keyboard_event *self);
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#endif /* KEYBOARD_EVENT_H */
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