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#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"
static ssize_t keyboard_pressed_keysym_index(struct roots_keyboard *keyboard,
xkb_keysym_t keysym) {
for (size_t i = 0; i < ROOTS_KEYBOARD_PRESSED_KEYSYMS_CAP; i++) {
if (keyboard->pressed_keysyms[i] == keysym) {
return i;
}
}
return -1;
}
static const char *exec_prefix = "exec ";
static void keyboard_binding_execute(struct roots_keyboard *keyboard,
const char *command) {
struct roots_server *server = keyboard->input->server;
if (strcmp(command, "exit") == 0) {
wl_display_terminate(server->wl_display);
} else if (strcmp(command, "close") == 0) {
if (server->desktop->views->length > 0) {
struct roots_view *view =
server->desktop->views->items[server->desktop->views->length-1];
view_close(view);
}
} else if (strcmp(command, "next_window") == 0) {
if (server->desktop->views->length > 0) {
struct roots_view *view = server->desktop->views->items[0];
set_view_focus(keyboard->input, server->desktop, view);
}
} 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 {
wlr_log(L_ERROR, "unknown binding command: %s", command);
}
}
/**
* Process a keypress from the keyboard.
*
* Returns true if the keysym was handled by a binding and false if the event
* should be propagated to clients.
*/
static bool keyboard_keysym_press(struct roots_keyboard *keyboard,
xkb_keysym_t keysym) {
ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
if (i < 0) {
i = keyboard_pressed_keysym_index(keyboard, XKB_KEY_NoSymbol);
if (i >= 0) {
keyboard->pressed_keysyms[i] = 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->input->wl_seat);
wlr_seat_keyboard_end_grab(keyboard->input->wl_seat);
}
uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
struct wl_list *bindings = &keyboard->input->server->config->bindings;
struct binding_config *bc;
wl_list_for_each(bc, bindings, link) {
if (modifiers ^ bc->modifiers) {
continue;
}
bool ok = true;
for (size_t i = 0; i < bc->keysyms_len; i++) {
ssize_t j = keyboard_pressed_keysym_index(keyboard, bc->keysyms[i]);
if (j < 0) {
ok = false;
break;
}
}
if (ok) {
keyboard_binding_execute(keyboard, bc->command);
return true;
}
}
return false;
}
static void keyboard_keysym_release(struct roots_keyboard *keyboard,
xkb_keysym_t keysym) {
ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
if (i >= 0) {
keyboard->pressed_keysyms[i] = XKB_KEY_NoSymbol;
}
}
static void keyboard_key_notify(struct wl_listener *listener, void *data) {
struct wlr_event_keyboard_key *event = data;
struct roots_keyboard *keyboard = wl_container_of(listener, keyboard, key);
uint32_t keycode = event->keycode + 8;
const xkb_keysym_t *syms;
int syms_len = xkb_state_key_get_syms(keyboard->device->keyboard->xkb_state,
keycode, &syms);
bool handled = false;
for (int i = 0; i < syms_len; i++) {
if (event->state == WLR_KEY_PRESSED) {
bool keysym_handled = keyboard_keysym_press(keyboard, syms[i]);
handled = handled || keysym_handled;
} else { // WLR_KEY_RELEASED
keyboard_keysym_release(keyboard, syms[i]);
}
}
if (!handled) {
wlr_seat_set_keyboard(keyboard->input->wl_seat, keyboard->device);
wlr_seat_keyboard_notify_key(keyboard->input->wl_seat, event->time_msec,
event->keycode, event->state);
}
}
static void keyboard_modifiers_notify(struct wl_listener *listener, void *data) {
struct roots_keyboard *r_keyboard =
wl_container_of(listener, r_keyboard, modifiers);
struct wlr_seat *seat = r_keyboard->input->wl_seat;
struct wlr_keyboard *keyboard = r_keyboard->device->keyboard;
wlr_seat_set_keyboard(seat, r_keyboard->device);
wlr_seat_keyboard_notify_modifiers(seat,
keyboard->modifiers.depressed,
keyboard->modifiers.latched,
keyboard->modifiers.locked,
keyboard->modifiers.group);
}
static void keyboard_config_merge(struct keyboard_config *config,
struct 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;
}
}
void keyboard_add(struct wlr_input_device *device, struct roots_input *input) {
struct roots_keyboard *keyboard = calloc(sizeof(struct roots_keyboard), 1);
if (keyboard == NULL) {
return;
}
device->data = keyboard;
keyboard->device = device;
keyboard->input = input;
keyboard->key.notify = keyboard_key_notify;
wl_signal_add(&device->keyboard->events.key, &keyboard->key);
keyboard->modifiers.notify = keyboard_modifiers_notify;
wl_signal_add(&device->keyboard->events.modifiers, &keyboard->modifiers);
wl_list_insert(&input->keyboards, &keyboard->link);
struct keyboard_config config;
memset(&config, 0, sizeof(config));
keyboard_config_merge(&config, config_get_keyboard(input->config, device));
keyboard_config_merge(&config, config_get_keyboard(input->config, NULL));
struct 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);
struct xkb_rule_names rules;
memset(&rules, 0, sizeof(rules));
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;
}
wlr_keyboard_set_keymap(device->keyboard, xkb_map_new_from_names(context,
&rules, XKB_KEYMAP_COMPILE_NO_FLAGS));
xkb_context_unref(context);
}
void keyboard_remove(struct wlr_input_device *device, struct roots_input *input) {
struct roots_keyboard *keyboard = device->data;
wl_list_remove(&keyboard->key.link);
wl_list_remove(&keyboard->modifiers.link);
wl_list_remove(&keyboard->link);
free(keyboard);
}
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