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input.c
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input.c
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#define _POSIX_C_SOURCE 200811L
#include <linux/input-event-codes.h>
#include <signal.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>
#include <wlr/backend/multi.h>
#include <wlr/backend/session.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
#include <xkbcommon/xkbcommon.h>
#include "server.h"
#include "view.h"
static char *corners[9] = {
"top_left_corner", "top_side", "top_right_corner",
"left_side", NULL, "right_side",
"bottom_left_corner", "bottom_side", "bottom_right_corner",
};
static char *corner = NULL;
static void
change_vt(struct wio_server *server, unsigned int vt) {
if (!wlr_backend_is_multi(server->backend)) {
return;
}
if (server->session) {
wlr_session_change_vt(server->session, vt);
}
}
static bool
server_handle_shortcut(struct wl_listener *listener, struct wlr_keyboard_key_event *event) {
struct wio_keyboard *keyboard = wl_container_of(listener, keyboard, key);
struct wio_server *server = keyboard->server;
/* Translate libinput keycode -> xkbcommon */
uint32_t keycode = event->keycode + 8;
/* Get a list of keysyms based on the keymap for this keyboard */
const xkb_keysym_t *symsv;
int symsc = xkb_state_key_get_syms(keyboard->wlr_keyboard->xkb_state, keycode, &symsv);
/* Catch C-A-F1 to C-A-F12 to change tty */
if (event->state == WL_KEYBOARD_KEY_STATE_PRESSED) {
for (int i = 0; i < symsc; i++) {
unsigned int vt = symsv[i] - XKB_KEY_XF86Switch_VT_1 + 1;
if (vt >= 1 && vt <= 12) {
change_vt(server, vt);
/* don't send any key events to clients when changing tty */
return true;
}
}
}
return false;
}
static void
keyboard_handle_modifiers(struct wl_listener *listener, void *data) {
struct wio_keyboard *keyboard = wl_container_of(listener, keyboard, modifiers);
wlr_seat_set_keyboard(keyboard->server->seat, keyboard->wlr_keyboard);
wlr_seat_keyboard_notify_modifiers(keyboard->server->seat,
&keyboard->wlr_keyboard->modifiers);
}
static void
keyboard_handle_key(struct wl_listener *listener, void *data) {
struct wio_keyboard *keyboard = wl_container_of(listener, keyboard, key);
struct wio_server *server = keyboard->server;
struct wlr_seat *seat = server->seat;
struct wlr_keyboard_key_event *event = data;
if (server_handle_shortcut(listener, event)) {
return;
}
wlr_seat_set_keyboard(seat, keyboard->wlr_keyboard);
wlr_seat_keyboard_notify_key(seat, event->time_msec, event->keycode, event->state);
}
static void
server_new_keyboard(struct wio_server *server, struct wlr_input_device *device) {
struct wlr_keyboard *wlr_keyboard = wlr_keyboard_from_input_device(device);
struct wio_keyboard *keyboard = calloc(1, sizeof(struct wio_keyboard));
keyboard->server = server;
keyboard->wlr_keyboard = wlr_keyboard;
struct xkb_rule_names rules = {0};
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 = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules,
XKB_KEYMAP_COMPILE_NO_FLAGS);
wlr_keyboard_set_keymap(wlr_keyboard, keymap);
xkb_keymap_unref(keymap);
xkb_context_unref(context);
wlr_keyboard_set_repeat_info(wlr_keyboard, 25, 600);
keyboard->modifiers.notify = keyboard_handle_modifiers;
wl_signal_add(&wlr_keyboard->events.modifiers, &keyboard->modifiers);
keyboard->key.notify = keyboard_handle_key;
wl_signal_add(&wlr_keyboard->events.key, &keyboard->key);
wlr_seat_set_keyboard(server->seat, wlr_keyboard);
wl_list_insert(&server->keyboards, &keyboard->link);
}
static void
server_new_pointer(struct wio_server *server, struct wlr_input_device *device) {
wlr_cursor_attach_input_device(server->cursor, device);
}
void
server_new_input(struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, new_input);
struct wlr_input_device *device = data;
switch (device->type) {
case WLR_INPUT_DEVICE_KEYBOARD:
server_new_keyboard(server, device);
break;
case WLR_INPUT_DEVICE_POINTER:
server_new_pointer(server, device);
break;
default:
break;
}
uint32_t caps = WL_SEAT_CAPABILITY_POINTER;
if (!wl_list_empty(&server->keyboards)) {
caps |= WL_SEAT_CAPABILITY_KEYBOARD;
}
wlr_seat_set_capabilities(server->seat, caps);
}
static void
process_cursor_motion(struct wio_server *server, uint32_t time) {
double sx, sy;
struct wlr_seat *seat = server->seat;
struct wlr_surface *surface = NULL;
struct wio_view *view = NULL;
if (server->input_state == INPUT_STATE_NONE) {
view = wio_view_at(server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
}
if (view) {
goto End;
}
switch (server->input_state) {
case INPUT_STATE_MOVE_SELECT:
case INPUT_STATE_RESIZE_SELECT:
case INPUT_STATE_DELETE_SELECT:
case INPUT_STATE_HIDE_SELECT:
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "hand1");
break;
case INPUT_STATE_MOVE:
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "grabbing");
break;
case INPUT_STATE_BORDER_DRAG:
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, corner);
break;
case INPUT_STATE_RESIZE_START:
case INPUT_STATE_NEW_START:
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "top_left_corner");
break;
case INPUT_STATE_RESIZE_END:
case INPUT_STATE_NEW_END:
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "grabbing");
break;
default:
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "left_ptr");
break;
}
End:
if (surface) {
bool focus_changed = seat->pointer_state.focused_surface != surface;
wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
if (!focus_changed) {
wlr_seat_pointer_notify_motion(seat, time, sx, sy);
}
return;
}
if (view) {
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, corners[view->area]);
}
wlr_seat_pointer_clear_focus(seat);
}
void
server_cursor_motion(struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, cursor_motion);
struct wlr_pointer_motion_event *event = data;
wlr_cursor_move(server->cursor, &event->pointer->base, event->delta_x, event->delta_y);
process_cursor_motion(server, event->time_msec);
}
void
server_cursor_motion_absolute( struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, cursor_motion_absolute);
struct wlr_pointer_motion_absolute_event *event = data;
wlr_cursor_warp_absolute(server->cursor, &event->pointer->base, event->x, event->y);
process_cursor_motion(server, event->time_msec);
}
static void
menu_handle_button(struct wio_server *server, struct wlr_pointer_button_event *event) {
server->menu.x = server->menu.y = -1;
switch (server->menu.selected) {
case 0:
server->input_state = INPUT_STATE_NEW_START;
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "grabbing");
break;
case 1:
server->input_state = INPUT_STATE_RESIZE_SELECT;
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "hand1");
break;
case 2:
server->input_state = INPUT_STATE_MOVE_SELECT;
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "hand1");
break;
case 3:
server->input_state = INPUT_STATE_DELETE_SELECT;
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "hand1");
break;
default:
server->input_state = INPUT_STATE_NONE;
break;
}
}
static void
view_begin_interactive(struct wio_view *view, struct wlr_surface *surface, double sx, double sy,
const char *cursor, enum wio_input_state state) {
wio_view_focus(view, surface);
view->server->interactive.view = view;
view->server->interactive.sx = (int)sx;
view->server->interactive.sy = (int)sy;
view->server->input_state = state;
wlr_cursor_set_xcursor(view->server->cursor, view->server->cursor_mgr, cursor);
}
static void
view_end_interactive(struct wio_server *server) {
server->input_state = INPUT_STATE_NONE;
server->interactive.view = NULL;
// TODO: Restore previous pointer?
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "left_ptr");
}
static void
new_view(struct wio_server *server) {
struct wlr_box box = wio_which_box(server);
if (box.width < MINWIDTH || box.height < MINHEIGHT) {
return;
}
struct wio_new_view *view = calloc(1, sizeof(struct wio_new_view));
view->box = box;
int fd[2];
if (pipe(fd) != 0) {
wlr_log(WLR_ERROR, "Unable to create pipe for fork");
return;
}
char cmd[1024];
if (snprintf(cmd, sizeof(cmd), "%s -- %s", server->cage, server->term) >= (int)sizeof(cmd)) {
fprintf(stderr, "New view command truncated\n");
return;
}
pid_t pid, child;
if ((pid = fork()) == 0) {
setsid();
sigset_t set;
sigemptyset(&set);
sigprocmask(SIG_SETMASK, &set, NULL);
close(fd[0]);
if ((child = fork()) == 0) {
close(fd[1]);
execl("/bin/sh", "/bin/sh", "-c", cmd, (void *)NULL);
_exit(0);
}
ssize_t s = 0;
while ((size_t)s < sizeof(pid_t)) {
s += write(fd[1], ((uint8_t *)&child) + s, sizeof(pid_t) - s);
}
close(fd[1]);
_exit(0); // Close child process
} else if (pid < 0) {
close(fd[0]);
close(fd[1]);
wlr_log(WLR_ERROR, "fork failed");
return;
}
close(fd[1]); // close write
ssize_t s = 0;
while ((size_t)s < sizeof(pid_t)) {
s += read(fd[0], ((uint8_t *)&child) + s, sizeof(pid_t) - s);
}
close(fd[0]);
waitpid(pid, NULL, 0);
if (child > 0) {
view->pid = child;
wl_list_insert(&server->new_views, &view->link);
}
}
static void
handle_button_internal(struct wio_server *server, struct wlr_pointer_button_event *event) {
// TODO: open menu if the client doesn't handle the button press
// will basically involve some serial hacking
struct wlr_box menu_box = {
.x = server->menu.x, .y = server->menu.y,
.width = server->menu.width, .height = server->menu.height,
};
struct wlr_box box;
double sx, sy;
struct wlr_surface *surface = NULL;
struct wio_view *view;
switch (server->input_state) {
case INPUT_STATE_NONE:
if (event->state == WLR_BUTTON_PRESSED) {
// TODO: Open over the last-used menu item
server->input_state = INPUT_STATE_MENU;
server->menu.x = server->cursor->x;
server->menu.y = server->cursor->y;
}
break;
case INPUT_STATE_MENU:
if (wlr_box_contains_point( &menu_box, server->cursor->x, server->cursor->y)) {
menu_handle_button(server, event);
break;
}
if (event->state == WLR_BUTTON_PRESSED) {
server->input_state = INPUT_STATE_NONE;
server->menu.x = server->menu.y = -1;
}
break;
case INPUT_STATE_NEW_START:
if (event->state != WLR_BUTTON_PRESSED) {
break;
}
server->interactive.sx = server->cursor->x;
server->interactive.sy = server->cursor->y;
server->input_state = INPUT_STATE_NEW_END;
break;
case INPUT_STATE_NEW_END:
new_view(server);
view_end_interactive(server);
break;
case INPUT_STATE_RESIZE_SELECT:
if (event->state != WLR_BUTTON_PRESSED) {
break;
}
view = wio_view_at(server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
if (view) {
view_begin_interactive(view, surface, sx, sy, "grabbing", INPUT_STATE_RESIZE_START);
} else {
view_end_interactive(server);
}
break;
case INPUT_STATE_RESIZE_START:
if (event->state != WLR_BUTTON_PRESSED) {
break;
}
server->interactive.sx = server->cursor->x;
server->interactive.sy = server->cursor->y;
server->interactive.view->area = VIEW_AREA_BORDER_BOTTOM_RIGHT;
server->input_state = INPUT_STATE_RESIZE_END;
break;
case INPUT_STATE_BORDER_DRAG:
box = wio_which_box(server);
box = wio_canon_box(server, box);
goto Done;
case INPUT_STATE_RESIZE_END:
box = wio_which_box(server);
if (box.width < MINWIDTH || box.height < MINHEIGHT) {
view_end_interactive(server);
break; // TODO: should this be inside or outside the if?
}
Done:
wio_view_move(server->interactive.view, box.x, box.y);
wlr_xdg_toplevel_set_size(server->interactive.view->xdg_surface->toplevel, box.width, box.height);
view_end_interactive(server);
break;
case INPUT_STATE_MOVE_SELECT:
if (event->state != WLR_BUTTON_PRESSED) {
break;
}
view = wio_view_at(server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
if (view) {
view_begin_interactive(view, surface, sx, sy, "grabbing", INPUT_STATE_MOVE);
} else {
view_end_interactive(server);
}
break;
case INPUT_STATE_MOVE:
wio_view_move(server->interactive.view,
server->cursor->x - server->interactive.sx,
server->cursor->y - server->interactive.sy);
view_end_interactive(server);
break;
case INPUT_STATE_DELETE_SELECT:
if (event->state != WLR_BUTTON_PRESSED) {
break;
}
view = wio_view_at(server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
if (view) {
wlr_xdg_toplevel_send_close(view->xdg_surface->toplevel);
}
view_end_interactive(server);
break;
default:
// TODO
break;
}
}
void
server_cursor_button(struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, cursor_button);
struct wlr_pointer_button_event *event = data;
double sx, sy;
struct wlr_surface *surface = NULL;
struct wio_view *view = NULL;
if (server->input_state == INPUT_STATE_NONE) {
view = wio_view_at(server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
}
if (!view) {
if (event->state == WLR_BUTTON_PRESSED && event->button != BTN_RIGHT) {
view_end_interactive(server);
return;
}
handle_button_internal(server, event);
return;
}
wio_view_focus(view, surface);
switch (view->area) {
case VIEW_AREA_SURFACE:
wlr_seat_pointer_notify_button(server->seat,
event->time_msec, event->button, event->state);
break;
default:
if (event->button == BTN_RIGHT) {
view_begin_interactive(view, surface, sx, sy, "grabbing", INPUT_STATE_MOVE);
break;
}
corner = corners[view->area];
view_begin_interactive(view, surface, view->x, view->y, corner, INPUT_STATE_BORDER_DRAG);
break;
}
}
void
server_cursor_axis(struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, cursor_axis);
struct wlr_pointer_axis_event *event = data;
wlr_seat_pointer_notify_axis(server->seat, event->time_msec,
event->orientation, event->delta,
event->delta_discrete, event->source);
}
void
server_cursor_frame(struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, cursor_frame);
wlr_seat_pointer_notify_frame(server->seat);
}
void
seat_request_cursor(struct wl_listener *listener, void *data) {
struct wio_server *server = wl_container_of(listener, server, request_cursor);
struct wlr_seat_pointer_request_set_cursor_event *event = data;
struct wlr_seat_client *focused_client = server->seat->pointer_state.focused_client;
if (focused_client == event->seat_client && server->input_state == INPUT_STATE_NONE) {
wlr_cursor_set_surface(server->cursor, event->surface, event->hotspot_x, event->hotspot_y);
}
}