From ebd8c2726b8caac6adc00cf15c5631e51d05ba1f Mon Sep 17 00:00:00 2001 From: dec05eba Date: Mon, 16 Dec 2024 02:21:38 +0100 Subject: Rewrite linux global hotkey to not depend on any libraries (also allows it to work on non-systemd systems(?)), remove unused gsr-window-name --- tools/gsr-global-hotkeys/main.c | 264 +++++----------------------------------- 1 file changed, 30 insertions(+), 234 deletions(-) (limited to 'tools/gsr-global-hotkeys/main.c') diff --git a/tools/gsr-global-hotkeys/main.c b/tools/gsr-global-hotkeys/main.c index 2823487..1be7f2d 100644 --- a/tools/gsr-global-hotkeys/main.c +++ b/tools/gsr-global-hotkeys/main.c @@ -1,28 +1,11 @@ -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include +#include "keyboard_event.h" -typedef struct { - struct xkb_context *xkb_context; - struct xkb_keymap *xkb_keymap; - struct xkb_state *xkb_state; -} key_mapper; +/* C stdlib */ +#include +#include -typedef enum { - MODKEY_ALT = 1 << 0, - MODKEY_SUPER = 1 << 1, - MODKEY_CTRL = 1 << 2, - MODKEY_SHIFT = 1 << 3 -} modkeys; +/* POSIX */ +#include typedef struct { uint32_t key; @@ -32,186 +15,28 @@ typedef struct { #define NUM_GLOBAL_HOTKEYS 6 static global_hotkey global_hotkeys[NUM_GLOBAL_HOTKEYS] = { - { .key = XKB_KEY_z, .modifiers = MODKEY_ALT, .action = "show_hide" }, - { .key = XKB_KEY_F9, .modifiers = MODKEY_ALT, .action = "record" }, - { .key = XKB_KEY_F7, .modifiers = MODKEY_ALT, .action = "pause" }, - { .key = XKB_KEY_F8, .modifiers = MODKEY_ALT, .action = "stream" }, - { .key = XKB_KEY_F10, .modifiers = MODKEY_ALT | MODKEY_SHIFT, .action = "replay_start" }, - { .key = XKB_KEY_F10, .modifiers = MODKEY_ALT, .action = "replay_save" } + { .key = KEY_Z, .modifiers = KEYBOARD_MODKEY_ALT, .action = "show_hide" }, + { .key = KEY_F9, .modifiers = KEYBOARD_MODKEY_ALT, .action = "record" }, + { .key = KEY_F7, .modifiers = KEYBOARD_MODKEY_ALT, .action = "pause" }, + { .key = KEY_F8, .modifiers = KEYBOARD_MODKEY_ALT, .action = "stream" }, + { .key = KEY_F10, .modifiers = KEYBOARD_MODKEY_ALT | KEYBOARD_MODKEY_SHIFT, .action = "replay_start" }, + { .key = KEY_F10, .modifiers = KEYBOARD_MODKEY_ALT, .action = "replay_save" } }; -static int open_restricted(const char *path, int flags, void *user_data) { - (void)user_data; - int fd = open(path, flags); - if(fd < 0) - fprintf(stderr, "error: failed to open %s, error: %s\n", path, strerror(errno)); - return fd < 0 ? -errno : fd; -} - -static void close_restricted(int fd, void *user_data) { - (void)user_data; - close(fd); -} - -static const struct libinput_interface interface = { - .open_restricted = open_restricted, - .close_restricted = close_restricted, -}; - -static bool is_mod_key(xkb_keycode_t xkb_key_code) { - return xkb_key_code >= XKB_KEY_Shift_L && xkb_key_code <= XKB_KEY_Hyper_R; -} - -typedef struct { - const char *modname; - modkeys key; -} modname_to_modkey_map; - -static uint32_t xkb_state_to_modifiers(struct xkb_state *xkb_state) { - const modname_to_modkey_map modifier_keys[] = { - { .modname = XKB_MOD_NAME_ALT, .key = MODKEY_ALT }, - { .modname = XKB_MOD_NAME_LOGO, .key = MODKEY_SUPER }, - { .modname = XKB_MOD_NAME_SHIFT, .key = MODKEY_SHIFT }, - { .modname = XKB_MOD_NAME_CTRL, .key = MODKEY_CTRL } - }; - - uint32_t modifiers = 0; - for(int i = 0; i < 4; ++i) { - if(xkb_state_mod_name_is_active(xkb_state, modifier_keys[i].modname, XKB_STATE_MODS_EFFECTIVE) > 0) - modifiers |= modifier_keys[i].key; - } - return modifiers; -} - -#define KEY_CODE_EV_TO_XKB(key) ((key) + 8) - -static int print_key_event(struct libinput_event *event, key_mapper *mapper) { - struct libinput_event_keyboard *keyboard = libinput_event_get_keyboard_event(event); - const uint32_t key_code = libinput_event_keyboard_get_key(keyboard); - enum libinput_key_state state_code = libinput_event_keyboard_get_key_state(keyboard); - - const xkb_keycode_t xkb_key_code = KEY_CODE_EV_TO_XKB(key_code); - xkb_state_update_key(mapper->xkb_state, xkb_key_code, state_code == LIBINPUT_KEY_STATE_PRESSED ? XKB_KEY_DOWN : XKB_KEY_UP); - xkb_keysym_t xkb_key_sym = xkb_state_key_get_one_sym(mapper->xkb_state, xkb_key_code); - // char main_key[128]; - // main_key[0] = '\0'; +static void on_key_callback(uint32_t key, uint32_t modifiers, int press_status, void *userdata) { + (void)userdata; + if(press_status != 1) /* 1 == Pressed */ + return; - // if(xkb_state_mod_name_is_active(mapper->xkb_state, XKB_MOD_NAME_LOGO, XKB_STATE_MODS_EFFECTIVE) > 0) - // strcat(main_key, "Super+"); - // if(xkb_state_mod_name_is_active(mapper->xkb_state, XKB_MOD_NAME_CTRL, XKB_STATE_MODS_EFFECTIVE) > 0) - // strcat(main_key, "Ctrl+"); - // if(xkb_state_mod_name_is_active(mapper->xkb_state, XKB_MOD_NAME_ALT, XKB_STATE_MODS_EFFECTIVE) > 0 && strcmp(main_key, "Meta") != 0) - // strcat(main_key, "Alt+"); - // if(xkb_state_mod_name_is_active(mapper->xkb_state, XKB_MOD_NAME_SHIFT, XKB_STATE_MODS_EFFECTIVE) > 0) - // strcat(main_key, "Shift+"); - - // if(!is_mod_key(xkb_key_sym)) { - // char reg_key[64]; - // reg_key[0] = '\0'; - // xkb_keysym_get_name(xkb_key_sym, reg_key, sizeof(reg_key)); - // strcat(main_key, reg_key); - // } - - if(state_code != LIBINPUT_KEY_STATE_PRESSED) - return 0; - - const uint32_t current_modifiers = xkb_state_to_modifiers(mapper->xkb_state); for(int i = 0; i < NUM_GLOBAL_HOTKEYS; ++i) { - if(xkb_key_sym == global_hotkeys[i].key && current_modifiers == global_hotkeys[i].modifiers) { + if(key == global_hotkeys[i].key && modifiers == global_hotkeys[i].modifiers) { puts(global_hotkeys[i].action); fflush(stdout); - break; } } - - return 0; -} - -static int handle_events(struct libinput *libinput, key_mapper *mapper) { - int result = -1; - struct libinput_event *event; - - if(libinput_dispatch(libinput) < 0) - return result; - - while((event = libinput_get_event(libinput)) != NULL) { - if(libinput_event_get_type(event) == LIBINPUT_EVENT_KEYBOARD_KEY) - print_key_event(event, mapper); - - libinput_event_destroy(event); - result = 0; - } - - return result; -} - -static int run_mainloop(struct libinput *libinput, key_mapper *mapper) { - struct pollfd fds[2] = { - { - .fd = libinput_get_fd(libinput), - .events = POLLIN, - .revents = 0 - }, - { - .fd = STDOUT_FILENO, - .events = 0, - .revents = 0 - } - }; - - if(handle_events(libinput, mapper) != 0) { - fprintf(stderr, "error: didn't receive device added events. Is this program not running as root?\n"); - return -1; - } - - while(poll(fds, 2, -1) >= 0) { - if(fds[0].revents & POLLIN) - handle_events(libinput, mapper); - if(fds[1].revents & (POLLHUP|POLLERR)) - break; - } - - return 0; -} - -static bool mapper_refresh_keymap(key_mapper *mapper) { - if(mapper->xkb_keymap != NULL) { - xkb_keymap_unref(mapper->xkb_keymap); - mapper->xkb_keymap = NULL; - } - - // TODO: - struct xkb_rule_names names = { - NULL, NULL, - NULL,//keymap_is_default(mapper->layout) ? NULL : mapper->layout, - NULL,//keymap_is_default(mapper->variant) ? NULL : mapper->variant, - NULL - }; - mapper->xkb_keymap = xkb_keymap_new_from_names(mapper->xkb_context, &names, XKB_KEYMAP_COMPILE_NO_FLAGS); - if(mapper->xkb_keymap == NULL) { - fprintf(stderr, "error: failed to create XKB keymap.\n"); - return false; - } - - if(mapper->xkb_state != NULL) { - xkb_state_unref(mapper->xkb_state); - mapper->xkb_state = NULL; - } - - mapper->xkb_state = xkb_state_new(mapper->xkb_keymap); - if(mapper->xkb_state == NULL) { - fprintf(stderr, "error: failed to create XKB state.\n"); - return false; - } - - return true; } int main(void) { - int result = 0; - struct udev *udev = NULL; - struct libinput *libinput = NULL; - const uid_t user_id = getuid(); if(geteuid() != 0) { if(setuid(0) == -1) { @@ -220,53 +45,24 @@ int main(void) { } } - udev = udev_new(); - if(!udev) { - fprintf(stderr, "error: udev_new failed\n"); - result = 1; - goto done; - } - - libinput = libinput_udev_create_context(&interface, NULL, udev); - if(!libinput) { - fprintf(stderr, "error: libinput_udev_create_context failed\n"); - result = 1; - goto done; - } - - if(libinput_udev_assign_seat(libinput, "seat0") != 0) { - fprintf(stderr, "error: libinput_udev_assign_seat with seat0 failed\n"); - result = 1; - goto done; + keyboard_event keyboard_ev; + if(!keyboard_event_init(&keyboard_ev, true)) { + fprintf(stderr, "Error: failed to setup hotplugging and no keyboard input devices were found\n"); + setuid(user_id); + return 1; } - key_mapper mapper; - mapper.xkb_context = xkb_context_new(XKB_CONTEXT_NO_FLAGS); - if(!mapper.xkb_context) { - fprintf(stderr, "error: xkb_context_new failed\n"); - result = 1; - goto done; - } + for(;;) { + keyboard_event_poll_events(&keyboard_ev, -1, on_key_callback, NULL); + if(keyboard_event_stdout_has_failed(&keyboard_ev)) { + fprintf(stderr, "Info: stdout closed (parent process likely closed this process), exiting...\n"); + break; + } - if(!mapper_refresh_keymap(&mapper)) { - fprintf(stderr, "error: key mapper failed\n"); - result = 1; - goto done; - } - if(run_mainloop(libinput, &mapper) < 0) { - fprintf(stderr, "error: failed to start main loop\n"); - result = 1; - goto done; } - done: - if(libinput) - libinput_unref(libinput); - - if(udev) - udev_unref(udev); - + keyboard_event_deinit(&keyboard_ev); setuid(user_id); - return result; + return 0; } -- cgit v1.2.3