wlroots/rootston/keyboard.c

384 lines
11 KiB
C

#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <wayland-server.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/backend/multi.h>
#include <wlr/backend/session.h>
#include <wlr/util/log.h>
#include <xkbcommon/xkbcommon.h>
#include "rootston/input.h"
#include "rootston/seat.h"
#include "rootston/keyboard.h"
static ssize_t pressed_keysyms_index(xkb_keysym_t *pressed_keysyms,
xkb_keysym_t keysym) {
for (size_t i = 0; i < ROOTS_KEYBOARD_PRESSED_KEYSYMS_CAP; ++i) {
if (pressed_keysyms[i] == keysym) {
return i;
}
}
return -1;
}
static size_t pressed_keysyms_length(xkb_keysym_t *pressed_keysyms) {
size_t n = 0;
for (size_t i = 0; i < ROOTS_KEYBOARD_PRESSED_KEYSYMS_CAP; ++i) {
if (pressed_keysyms[i] != XKB_KEY_NoSymbol) {
++n;
}
}
return n;
}
static void pressed_keysyms_add(xkb_keysym_t *pressed_keysyms,
xkb_keysym_t keysym) {
ssize_t i = pressed_keysyms_index(pressed_keysyms, keysym);
if (i < 0) {
i = pressed_keysyms_index(pressed_keysyms, XKB_KEY_NoSymbol);
if (i >= 0) {
pressed_keysyms[i] = keysym;
}
}
}
static void pressed_keysyms_remove(xkb_keysym_t *pressed_keysyms,
xkb_keysym_t keysym) {
ssize_t i = pressed_keysyms_index(pressed_keysyms, keysym);
if (i >= 0) {
pressed_keysyms[i] = XKB_KEY_NoSymbol;
}
}
static bool keysym_is_modifier(xkb_keysym_t keysym) {
switch (keysym) {
case XKB_KEY_Shift_L: case XKB_KEY_Shift_R:
case XKB_KEY_Control_L: case XKB_KEY_Control_R:
case XKB_KEY_Caps_Lock:
case XKB_KEY_Shift_Lock:
case XKB_KEY_Meta_L: case XKB_KEY_Meta_R:
case XKB_KEY_Alt_L: case XKB_KEY_Alt_R:
case XKB_KEY_Super_L: case XKB_KEY_Super_R:
case XKB_KEY_Hyper_L: case XKB_KEY_Hyper_R:
return true;
default:
return false;
}
}
static void pressed_keysyms_update(xkb_keysym_t *pressed_keysyms,
const xkb_keysym_t *keysyms, size_t keysyms_len,
enum wlr_key_state state) {
for (size_t i = 0; i < keysyms_len; ++i) {
if (keysym_is_modifier(keysyms[i])) {
continue;
}
if (state == WLR_KEY_PRESSED) {
pressed_keysyms_add(pressed_keysyms, keysyms[i]);
} else { // WLR_KEY_RELEASED
pressed_keysyms_remove(pressed_keysyms, keysyms[i]);
}
}
}
static const char *exec_prefix = "exec ";
static void keyboard_binding_execute(struct roots_keyboard *keyboard,
const char *command) {
struct roots_seat *seat = keyboard->seat;
if (strcmp(command, "exit") == 0) {
wl_display_terminate(keyboard->input->server->wl_display);
} else if (strcmp(command, "close") == 0) {
struct roots_view *focus = roots_seat_get_focus(seat);
if (focus != NULL) {
view_close(focus);
}
} else if (strcmp(command, "fullscreen") == 0) {
struct roots_view *focus = roots_seat_get_focus(seat);
if (focus != NULL) {
bool is_fullscreen = focus->fullscreen_output != NULL;
view_set_fullscreen(focus, !is_fullscreen, NULL);
}
} else if (strcmp(command, "next_window") == 0) {
roots_seat_cycle_focus(seat);
} else if (strncmp(exec_prefix, command, strlen(exec_prefix)) == 0) {
const char *shell_cmd = command + strlen(exec_prefix);
pid_t pid = fork();
if (pid < 0) {
wlr_log(L_ERROR, "cannot execute binding command: fork() failed");
return;
} else if (pid == 0) {
execl("/bin/sh", "/bin/sh", "-c", shell_cmd, (void *)NULL);
}
} else if (strcmp(command, "maximize") == 0) {
struct roots_view *focus = roots_seat_get_focus(seat);
if (focus != NULL) {
view_maximize(focus, !focus->maximized);
}
} else if (strcmp(command, "nop") == 0) {
wlr_log(L_DEBUG, "nop command");
} else {
wlr_log(L_ERROR, "unknown binding command: %s", command);
}
}
/**
* Execute a built-in, hardcoded compositor binding. These are triggered from a
* single keysym.
*
* Returns true if the keysym was handled by a binding and false if the event
* should be propagated to clients.
*/
static bool keyboard_execute_compositor_binding(struct roots_keyboard *keyboard,
xkb_keysym_t keysym) {
if (keysym >= XKB_KEY_XF86Switch_VT_1 &&
keysym <= XKB_KEY_XF86Switch_VT_12) {
struct roots_server *server = keyboard->input->server;
if (wlr_backend_is_multi(server->backend)) {
struct wlr_session *session =
wlr_multi_get_session(server->backend);
if (session) {
unsigned vt = keysym - XKB_KEY_XF86Switch_VT_1 + 1;
wlr_session_change_vt(session, vt);
}
}
return true;
}
if (keysym == XKB_KEY_Escape) {
wlr_seat_pointer_end_grab(keyboard->seat->seat);
wlr_seat_keyboard_end_grab(keyboard->seat->seat);
}
return false;
}
/**
* Execute keyboard bindings. These include compositor bindings and user-defined
* bindings.
*
* Returns true if the keysym was handled by a binding and false if the event
* should be propagated to clients.
*/
static bool keyboard_execute_binding(struct roots_keyboard *keyboard,
xkb_keysym_t *pressed_keysyms, uint32_t modifiers,
const xkb_keysym_t *keysyms, size_t keysyms_len) {
for (size_t i = 0; i < keysyms_len; ++i) {
if (keyboard_execute_compositor_binding(keyboard, keysyms[i])) {
return true;
}
}
// User-defined bindings
size_t n = pressed_keysyms_length(pressed_keysyms);
struct wl_list *bindings = &keyboard->input->server->config->bindings;
struct roots_binding_config *bc;
wl_list_for_each(bc, bindings, link) {
if (modifiers ^ bc->modifiers || n != bc->keysyms_len) {
continue;
}
bool ok = true;
for (size_t i = 0; i < bc->keysyms_len; i++) {
ssize_t j = pressed_keysyms_index(pressed_keysyms, bc->keysyms[i]);
if (j < 0) {
ok = false;
break;
}
}
if (ok) {
keyboard_binding_execute(keyboard, bc->command);
return true;
}
}
return false;
}
/*
* Get keysyms and modifiers from the keyboard as xkb sees them.
*
* This uses the xkb keysyms translation based on pressed modifiers and clears
* the consumed modifiers from the list of modifiers passed to keybind
* detection.
*
* On US layout, pressing Alt+Shift+2 will trigger Alt+@.
*/
static size_t keyboard_keysyms_translated(struct roots_keyboard *keyboard,
xkb_keycode_t keycode, const xkb_keysym_t **keysyms,
uint32_t *modifiers) {
*modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
xkb_mod_mask_t consumed = xkb_state_key_get_consumed_mods2(
keyboard->device->keyboard->xkb_state, keycode, XKB_CONSUMED_MODE_XKB);
*modifiers = *modifiers & ~consumed;
return xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state,
keycode, keysyms);
}
/*
* Get keysyms and modifiers from the keyboard as if modifiers didn't change
* keysyms.
*
* This avoids the xkb keysym translation based on modifiers considered pressed
* in the state.
*
* This will trigger keybinds such as Alt+Shift+2.
*/
static size_t keyboard_keysyms_raw(struct roots_keyboard *keyboard,
xkb_keycode_t keycode, const xkb_keysym_t **keysyms,
uint32_t *modifiers) {
*modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
xkb_layout_index_t layout_index = xkb_state_key_get_layout(
keyboard->device->keyboard->xkb_state, keycode);
return xkb_keymap_key_get_syms_by_level(keyboard->device->keyboard->keymap,
keycode, layout_index, 0, keysyms);
}
void roots_keyboard_handle_key(struct roots_keyboard *keyboard,
struct wlr_event_keyboard_key *event) {
xkb_keycode_t keycode = event->keycode + 8;
bool handled = false;
uint32_t modifiers;
const xkb_keysym_t *keysyms;
size_t keysyms_len;
// Handle translated keysyms
keysyms_len = keyboard_keysyms_translated(keyboard, keycode, &keysyms,
&modifiers);
pressed_keysyms_update(keyboard->pressed_keysyms_translated, keysyms,
keysyms_len, event->state);
if (event->state == WLR_KEY_PRESSED) {
handled = keyboard_execute_binding(keyboard,
keyboard->pressed_keysyms_translated, modifiers, keysyms,
keysyms_len);
}
// Handle raw keysyms
keysyms_len = keyboard_keysyms_raw(keyboard, keycode, &keysyms, &modifiers);
pressed_keysyms_update(keyboard->pressed_keysyms_raw, keysyms, keysyms_len,
event->state);
if (event->state == WLR_KEY_PRESSED && !handled) {
handled = keyboard_execute_binding(keyboard,
keyboard->pressed_keysyms_raw, modifiers, keysyms, keysyms_len);
}
if (!handled) {
wlr_seat_set_keyboard(keyboard->seat->seat, keyboard->device);
wlr_seat_keyboard_notify_key(keyboard->seat->seat, event->time_msec,
event->keycode, event->state);
}
}
void roots_keyboard_handle_modifiers(struct roots_keyboard *r_keyboard) {
struct wlr_seat *seat = r_keyboard->seat->seat;
wlr_seat_set_keyboard(seat, r_keyboard->device);
wlr_seat_keyboard_notify_modifiers(seat);
}
static void keyboard_config_merge(struct roots_keyboard_config *config,
struct roots_keyboard_config *fallback) {
if (fallback == NULL) {
return;
}
if (config->rules == NULL) {
config->rules = fallback->rules;
}
if (config->model == NULL) {
config->model = fallback->model;
}
if (config->layout == NULL) {
config->layout = fallback->layout;
}
if (config->variant == NULL) {
config->variant = fallback->variant;
}
if (config->options == NULL) {
config->options = fallback->options;
}
if (config->meta_key == 0) {
config->meta_key = fallback->meta_key;
}
if (config->name == NULL) {
config->name = fallback->name;
}
if (config->repeat_rate <= 0) {
config->repeat_rate = fallback->repeat_rate;
}
if (config->repeat_delay <= 0) {
config->repeat_delay = fallback->repeat_delay;
}
}
struct roots_keyboard *roots_keyboard_create(struct wlr_input_device *device,
struct roots_input *input) {
struct roots_keyboard *keyboard = calloc(sizeof(struct roots_keyboard), 1);
if (keyboard == NULL) {
return NULL;
}
device->data = keyboard;
keyboard->device = device;
keyboard->input = input;
struct roots_keyboard_config *config =
calloc(1, sizeof(struct roots_keyboard_config));
if (config == NULL) {
free(keyboard);
return NULL;
}
keyboard_config_merge(config, roots_config_get_keyboard(input->config, device));
keyboard_config_merge(config, roots_config_get_keyboard(input->config, NULL));
struct roots_keyboard_config env_config = {
.rules = getenv("XKB_DEFAULT_RULES"),
.model = getenv("XKB_DEFAULT_MODEL"),
.layout = getenv("XKB_DEFAULT_LAYOUT"),
.variant = getenv("XKB_DEFAULT_VARIANT"),
.options = getenv("XKB_DEFAULT_OPTIONS"),
};
keyboard_config_merge(config, &env_config);
keyboard->config = config;
struct xkb_rule_names rules = { 0 };
rules.rules = config->rules;
rules.model = config->model;
rules.layout = config->layout;
rules.variant = config->variant;
rules.options = config->options;
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
if (context == NULL) {
wlr_log(L_ERROR, "Cannot create XKB context");
return NULL;
}
struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules,
XKB_KEYMAP_COMPILE_NO_FLAGS);
if (keymap == NULL) {
xkb_context_unref(context);
wlr_log(L_ERROR, "Cannot create XKB keymap");
return NULL;
}
wlr_keyboard_set_keymap(device->keyboard, keymap);
xkb_keymap_unref(keymap);
xkb_context_unref(context);
int repeat_rate = (config->repeat_rate > 0) ? config->repeat_rate : 25;
int repeat_delay = (config->repeat_delay > 0) ? config->repeat_delay : 600;
wlr_keyboard_set_repeat_info(device->keyboard, repeat_rate, repeat_delay);
return keyboard;
}
void roots_keyboard_destroy(struct roots_keyboard *keyboard) {
wl_list_remove(&keyboard->link);
free(keyboard->config);
free(keyboard);
}