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Try and support different keyboard layouts through x11 xkb mapping

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dec05eba
2025-01-07 01:15:56 +01:00
parent ee123ceb0a
commit 9a5c20836a
4 changed files with 172 additions and 10 deletions
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79
tools/gsr-global-hotkeys/keyboard_event.c
View File

@@ -25,6 +25,24 @@
#define KEY_STATES_SIZE (KEY_MAX/8 + 1)
#define KEYCODE_TO_XKB_KEYCODE(key) ((key) + 8)
#define XK_Shift_L 0xffe1 /* Left shift */
#define XK_Shift_R 0xffe2 /* Right shift */
#define XK_Control_L 0xffe3 /* Left control */
#define XK_Control_R 0xffe4 /* Right control */
#define XK_Alt_L 0xffe9 /* Left alt */
#define XK_Alt_R 0xffea /* Right alt */
#define XK_Super_L 0xffeb /* Left super */
#define XK_Super_R 0xffec /* Right super */
#define XK_z 0x007a
#define XK_F7 0xffc4
#define XK_F8 0xffc5
#define XK_F9 0xffc6
#define XK_F10 0xffc7
#define XK_F11 0xffc8
static inline int count_num_bits_set(unsigned char c) {
int n = 0;
n += (c & 1);
@@ -117,6 +135,35 @@ static void keyboard_event_process_key_state_change(keyboard_event *self, struct
}
}
static uint32_t keycode_to_keysym(keyboard_event *self, uint16_t keycode) {
const unsigned long xkb_keycode = KEYCODE_TO_XKB_KEYCODE(keycode);
if(self->x_context.display && self->x_context.XKeycodeToKeysym && xkb_keycode <= 255)
return self->x_context.XKeycodeToKeysym(self->x_context.display, xkb_keycode, 0);
else
return 0;
}
/* TODO: Support more keys when needed */
static uint32_t keysym_to_keycode(uint32_t keysym) {
switch(keysym) {
case XK_Control_L: return KEY_LEFTCTRL;
case XK_Shift_L: return KEY_LEFTSHIFT;
case XK_Alt_L: return KEY_LEFTALT;
case XK_Super_L: return KEY_LEFTMETA;
case XK_Control_R: return KEY_RIGHTCTRL;
case XK_Shift_R: return KEY_RIGHTSHIFT;
case XK_Alt_R: return KEY_RIGHTALT;
case XK_Super_R: return KEY_RIGHTMETA;
case XK_z: return KEY_Z;
case XK_F7: return KEY_F7;
case XK_F8: return KEY_F8;
case XK_F9: return KEY_F9;
case XK_F10: return KEY_F10;
case XK_F11: return KEY_F11;
default: return 0;
}
}
static void keyboard_event_process_input_event_data(keyboard_event *self, event_extra_data *extra_data, int fd, key_callback callback, void *userdata) {
struct input_event event;
if(read(fd, &event, sizeof(event)) != sizeof(event)) {
@@ -137,7 +184,12 @@ static void keyboard_event_process_input_event_data(keyboard_event *self, event_
if(event.type == EV_KEY) {
keyboard_event_process_key_state_change(self, event, extra_data, fd);
switch(event.code) {
uint32_t keycode = event.code;
const uint32_t keysym = keycode_to_keysym(self, event.code);
if(keysym)
keycode = keysym_to_keycode(keysym);
switch(keycode) {
case KEY_LEFTSHIFT:
self->lshift_button_state = event.value >= 1 ? KEYBOARD_BUTTON_PRESSED : KEYBOARD_BUTTON_RELEASED;
break;
@@ -168,7 +220,7 @@ static void keyboard_event_process_input_event_data(keyboard_event *self, event_
const bool lalt_pressed = self->lalt_button_state == KEYBOARD_BUTTON_PRESSED;
const bool ralt_pressed = self->ralt_button_state == KEYBOARD_BUTTON_PRESSED;
const bool meta_pressed = self->lmeta_button_state == KEYBOARD_BUTTON_PRESSED || self->rmeta_button_state == KEYBOARD_BUTTON_PRESSED;
//fprintf(stderr, "pressed key: %d, state: %d, shift: %s, ctrl: %s, alt: %s, meta: %s\n", event.code, event.value,
//fprintf(stderr, "pressed key: %d, state: %d, shift: %s, ctrl: %s, alt: %s, meta: %s\n", keycode, event.value,
// shift_pressed ? "yes" : "no", ctrl_pressed ? "yes" : "no", alt_pressed ? "yes" : "no", meta_pressed ? "yes" : "no");
uint32_t modifiers = 0;
if(shift_pressed)
@@ -182,7 +234,7 @@ static void keyboard_event_process_input_event_data(keyboard_event *self, event_
if(meta_pressed)
modifiers |= KEYBOARD_MODKEY_SUPER;
if(!callback(event.code, modifiers, event.value, userdata))
if(!callback(keycode, modifiers, event.value, userdata))
return;
break;
@@ -406,11 +458,12 @@ static int setup_virtual_keyboard_input(const char *name) {
return fd;
}
bool keyboard_event_init(keyboard_event *self, bool poll_stdout_error, bool exclusive_grab, keyboard_grab_type grab_type) {
bool keyboard_event_init(keyboard_event *self, bool poll_stdout_error, bool exclusive_grab, keyboard_grab_type grab_type, x11_context x_context) {
memset(self, 0, sizeof(*self));
self->stdout_event_index = -1;
self->hotplug_event_index = -1;
self->grab_type = grab_type;
self->x_context = x_context;
if(exclusive_grab) {
self->uinput_fd = setup_virtual_keyboard_input(GSR_UI_VIRTUAL_KEYBOARD_NAME);
@@ -490,7 +543,25 @@ static void on_device_added_callback(const char *devname, void *userdata) {
keyboard_event_try_add_device_if_keyboard(keyboard_ev, dev_input_filepath);
}
#define MappingNotify 34
static void keyboard_event_poll_x11_events(keyboard_event *self) {
if(!self->x_context.display || !self->x_context.XPending || !self->x_context.XNextEvent || !self->x_context.XRefreshKeyboardMapping)
return;
XEvent xev;
while(self->x_context.XPending(self->x_context.display)) {
xev.type = 0;
self->x_context.XNextEvent(self->x_context.display, &xev);
if(xev.type == MappingNotify)
self->x_context.XRefreshKeyboardMapping(xev.data);
}
}
void keyboard_event_poll_events(keyboard_event *self, int timeout_milliseconds, key_callback callback, void *userdata) {
/* TODO: Add the x11 connection to the below poll? */
keyboard_event_poll_x11_events(self);
if(poll(self->event_polls, self->num_event_polls, timeout_milliseconds) <= 0)
return;

23
tools/gsr-global-hotkeys/keyboard_event.h
View File

@@ -17,6 +17,26 @@
#define MAX_EVENT_POLLS 32
typedef struct {
union {
int type;
unsigned char data[192];
};
} XEvent;
typedef unsigned long (*XKeycodeToKeysym_FUNC)(void *display, unsigned char keycode, int index);
typedef int (*XPending_FUNC)(void *display);
typedef int (*XNextEvent_FUNC)(void *display, XEvent *event_return);
typedef int (*XRefreshKeyboardMapping_FUNC)(void* event_map);
typedef struct {
void *display;
XKeycodeToKeysym_FUNC XKeycodeToKeysym;
XPending_FUNC XPending;
XNextEvent_FUNC XNextEvent;
XRefreshKeyboardMapping_FUNC XRefreshKeyboardMapping;
} x11_context;
typedef enum {
KEYBOARD_MODKEY_LALT = 1 << 0,
KEYBOARD_MODKEY_RALT = 1 << 2,
@@ -52,6 +72,7 @@ typedef struct {
int uinput_fd;
bool stdout_failed;
keyboard_grab_type grab_type;
x11_context x_context;
hotplug_event hotplug_ev;
@@ -69,7 +90,7 @@ typedef struct {
/* 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);
bool keyboard_event_init(keyboard_event *self, bool poll_stdout_error, bool exclusive_grab, keyboard_grab_type grab_type, x11_context x_context);
void keyboard_event_deinit(keyboard_event *self);
/* If |timeout_milliseconds| is -1 then wait until an event is received */

75
tools/gsr-global-hotkeys/main.c
View File

@@ -7,6 +7,7 @@
/* POSIX */
#include <unistd.h>
#include <dlfcn.h>
typedef struct {
uint32_t key;
@@ -45,6 +46,76 @@ static void usage(void) {
fprintf(stderr, " --virtual Grab all virtual devices only.\n");
}
typedef void* (*XOpenDisplay_FUNC)(const char*);
typedef int (*XErrorHandler_FUNC)(void *display, void* error_event);
typedef XErrorHandler_FUNC (*XSetErrorHandler_FUNC)(XErrorHandler_FUNC handler);
static int x_ignore_error(void *display, void *ee) {
(void)display;
(void)ee;
return 0;
}
static x11_context setup_x11_context(void) {
x11_context x_context = {0};
XSetErrorHandler_FUNC XSetErrorHandler = NULL;
void *x11_lib = dlopen("libX11.so.6", RTLD_LAZY);
if(!x11_lib) {
fprintf(stderr, "Warning: dlopen libX11.so.6 failed\n");
return x_context;
}
XOpenDisplay_FUNC XOpenDisplay = dlsym(x11_lib, "XOpenDisplay");
if(!XOpenDisplay) {
fprintf(stderr, "Warning: dlsym XOpenDisplay failed\n");
goto fail;
}
x_context.XKeycodeToKeysym = dlsym(x11_lib, "XKeycodeToKeysym");
if(!x_context.XKeycodeToKeysym) {
fprintf(stderr, "Warning: dlsym XKeycodeToKeysym failed\n");
goto fail;
}
x_context.XPending = dlsym(x11_lib, "XPending");
if(!x_context.XPending) {
fprintf(stderr, "Warning: dlsym XPending failed\n");
goto fail;
}
x_context.XNextEvent = dlsym(x11_lib, "XNextEvent");
if(!x_context.XNextEvent) {
fprintf(stderr, "Warning: dlsym XNextEvent failed\n");
goto fail;
}
x_context.XRefreshKeyboardMapping = dlsym(x11_lib, "XRefreshKeyboardMapping");
if(!x_context.XRefreshKeyboardMapping) {
fprintf(stderr, "Warning: dlsym XRefreshKeyboardMapping failed\n");
goto fail;
}
x_context.display = XOpenDisplay(NULL);
if(!x_context.display) {
fprintf(stderr, "Warning: XOpenDisplay failed\n");
goto fail;
}
XSetErrorHandler = dlsym(x11_lib, "XSetErrorHandler");
if(XSetErrorHandler)
XSetErrorHandler(x_ignore_error);
else
fprintf(stderr, "Warning: dlsym XSetErrorHandler failed\n");
return x_context;
fail:
memset(&x_context, 0, sizeof(x_context));
dlclose(x11_lib);
return x_context;
}
int main(int argc, char **argv) {
keyboard_grab_type grab_type = KEYBOARD_GRAB_TYPE_ALL;
if(argc == 2) {
@@ -64,6 +135,8 @@ int main(int argc, char **argv) {
return 1;
}
x11_context x_context = setup_x11_context();
const uid_t user_id = getuid();
if(geteuid() != 0) {
if(setuid(0) == -1) {
@@ -73,7 +146,7 @@ int main(int argc, char **argv) {
}
keyboard_event keyboard_ev;
if(!keyboard_event_init(&keyboard_ev, true, true, grab_type)) {
if(!keyboard_event_init(&keyboard_ev, true, true, grab_type, x_context)) {
fprintf(stderr, "Error: failed to setup hotplugging and no keyboard input devices were found\n");
setuid(user_id);
return 1;