wlroots/rootston/keyboard.c

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#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
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#include <unistd.h>
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#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"
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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) {
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return i;
}
}
return -1;
}
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static const char *exec_prefix = "exec ";
static void keyboard_binding_execute(struct roots_keyboard *keyboard,
const char *command) {
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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 (keyboard->input->last_active_view != NULL) {
view_close(keyboard->input->last_active_view);
}
} else if (strncmp(exec_prefix, command, strlen(exec_prefix)) == 0) {
const char *shell_cmd = command + strlen(exec_prefix);
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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);
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}
} else {
wlr_log(L_ERROR, "unknown binding command: %s", command);
}
}
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static void keyboard_keysym_press(struct roots_keyboard *keyboard,
xkb_keysym_t keysym) {
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ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
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if (i < 0) {
i = keyboard_pressed_keysym_index(keyboard, XKB_KEY_NoSymbol);
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if (i >= 0) {
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keyboard->pressed_keysyms[i] = keysym;
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}
}
if (keysym >= XKB_KEY_XF86Switch_VT_1 &&
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keysym <= XKB_KEY_XF86Switch_VT_12) {
struct roots_server *server = keyboard->input->server;
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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);
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}
}
return;
}
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);
}
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}
}
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static void keyboard_keysym_release(struct roots_keyboard *keyboard,
xkb_keysym_t keysym) {
ssize_t i = keyboard_pressed_keysym_index(keyboard, keysym);
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if (i >= 0) {
keyboard->pressed_keysyms[i] = XKB_KEY_NoSymbol;
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}
}
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);
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for (int i = 0; i < syms_len; i++) {
if (event->state == WLR_KEY_PRESSED) {
keyboard_keysym_press(keyboard, syms[i]);
} else { // WLR_KEY_RELEASED
keyboard_keysym_release(keyboard, syms[i]);
}
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}
}
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void keyboard_add(struct wlr_input_device *device, struct roots_input *input) {
struct roots_keyboard *keyboard = calloc(sizeof(struct roots_keyboard), 1);
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device->data = keyboard;
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keyboard->device = device;
keyboard->input = input;
wl_list_init(&keyboard->key.link);
keyboard->key.notify = keyboard_key_notify;
wl_signal_add(&device->keyboard->events.key, &keyboard->key);
wl_list_insert(&input->keyboards, &keyboard->link);
struct xkb_rule_names rules;
memset(&rules, 0, sizeof(rules));
rules.rules = getenv("XKB_DEFAULT_RULES");
rules.model = getenv("XKB_DEFAULT_MODEL");
rules.layout = getenv("XKB_DEFAULT_LAYOUT");
rules.variant = getenv("XKB_DEFAULT_VARIANT");
rules.options = getenv("XKB_DEFAULT_OPTIONS");
struct xkb_context *context;
assert(context = xkb_context_new(XKB_CONTEXT_NO_FLAGS));
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wlr_keyboard_set_keymap(device->keyboard, xkb_map_new_from_names(context,
&rules, XKB_KEYMAP_COMPILE_NO_FLAGS));
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xkb_context_unref(context);
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wlr_seat_attach_keyboard(input->wl_seat, device);
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}
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void keyboard_remove(struct wlr_input_device *device, struct roots_input *input) {
struct roots_keyboard *keyboard = device->data;
wlr_seat_detach_keyboard(input->wl_seat, device->keyboard);
wl_list_remove(&keyboard->key.link);
wl_list_remove(&keyboard->link);
free(keyboard);
}