wlroots-hyprland/backend/wayland/seat.c

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C
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#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
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#include <stdint.h>
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#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
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#include <wayland-client.h>
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#include <wlr/interfaces/wlr_keyboard.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/interfaces/wlr_touch.h>
#include <wlr/interfaces/wlr_tablet_tool.h>
#include <wlr/interfaces/wlr_tablet_pad.h>
#include <wlr/types/wlr_input_device.h>
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#include <wlr/util/log.h>
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#include "backend/wayland.h"
#include "util/time.h"
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static void keyboard_handle_keymap(void *data, struct wl_keyboard *wl_keyboard,
uint32_t format, int32_t fd, uint32_t size) {
close(fd);
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}
static void keyboard_handle_enter(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, struct wl_surface *surface, struct wl_array *keys) {
struct wlr_keyboard *keyboard = data;
uint32_t *keycode_ptr;
wl_array_for_each(keycode_ptr, keys) {
struct wlr_keyboard_key_event event = {
.keycode = *keycode_ptr,
.state = WL_KEYBOARD_KEY_STATE_PRESSED,
.time_msec = get_current_time_msec(),
.update_state = false,
};
wlr_keyboard_notify_key(keyboard, &event);
}
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}
static void keyboard_handle_leave(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, struct wl_surface *surface) {
struct wlr_keyboard *keyboard = data;
size_t num_keycodes = keyboard->num_keycodes;
uint32_t pressed[num_keycodes + 1];
memcpy(pressed, keyboard->keycodes,
num_keycodes * sizeof(uint32_t));
for (size_t i = 0; i < num_keycodes; ++i) {
uint32_t keycode = pressed[i];
struct wlr_keyboard_key_event event = {
.keycode = keycode,
.state = WL_KEYBOARD_KEY_STATE_RELEASED,
.time_msec = get_current_time_msec(),
.update_state = false,
};
wlr_keyboard_notify_key(keyboard, &event);
}
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}
static void keyboard_handle_key(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t time, uint32_t key, uint32_t state) {
struct wlr_keyboard *keyboard = data;
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struct wlr_keyboard_key_event wlr_event = {
.keycode = key,
.state = state,
.time_msec = time,
.update_state = false,
};
wlr_keyboard_notify_key(keyboard, &wlr_event);
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}
static void keyboard_handle_modifiers(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t mods_depressed, uint32_t mods_latched,
uint32_t mods_locked, uint32_t group) {
struct wlr_keyboard *keyboard = data;
wlr_keyboard_notify_modifiers(keyboard, mods_depressed, mods_latched,
mods_locked, group);
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}
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static void keyboard_handle_repeat_info(void *data,
struct wl_keyboard *wl_keyboard, int32_t rate, int32_t delay) {
// This space is intentionally left blank
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}
static const struct wl_keyboard_listener keyboard_listener = {
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.keymap = keyboard_handle_keymap,
.enter = keyboard_handle_enter,
.leave = keyboard_handle_leave,
.key = keyboard_handle_key,
.modifiers = keyboard_handle_modifiers,
.repeat_info = keyboard_handle_repeat_info
};
static const struct wlr_keyboard_impl keyboard_impl = {
.name = "wl-keyboard",
};
void init_seat_keyboard(struct wlr_wl_seat *seat) {
assert(seat->wl_keyboard);
char name[128] = {0};
snprintf(name, sizeof(name), "wayland-keyboard-%s", seat->name);
wlr_keyboard_init(&seat->wlr_keyboard, &keyboard_impl, name);
wl_keyboard_add_listener(seat->wl_keyboard, &keyboard_listener,
&seat->wlr_keyboard);
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wl_signal_emit_mutable(&seat->backend->backend.events.new_input,
&seat->wlr_keyboard.base);
}
static void touch_coordinates_to_absolute(struct wlr_wl_seat *seat,
wl_fixed_t x, wl_fixed_t y, double *sx, double *sy) {
/**
* TODO: multi-output touch support
* Although the wayland backend supports multi-output pointers, the support
* for multi-output touch has been left on the side for simplicity reasons.
* If this is a feature you want/need, please open an issue on the wlroots
* tracker here https://gitlab.freedesktop.org/wlroots/wlroots/-/issues
*/
struct wlr_wl_output *output, *tmp;
wl_list_for_each_safe(output, tmp, &seat->backend->outputs, link) {
*sx = wl_fixed_to_double(x) / output->wlr_output.width;
*sy = wl_fixed_to_double(y) / output->wlr_output.height;
return; // Choose the first output in the list
}
*sx = *sy = 0;
}
static void touch_handle_down(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time, struct wl_surface *surface,
int32_t id, wl_fixed_t x, wl_fixed_t y) {
struct wlr_wl_seat *seat = data;
struct wlr_touch *touch = &seat->wlr_touch;
struct wlr_wl_touch_points *points = &seat->touch_points;
assert(points->len != sizeof(points->ids) / sizeof(points->ids[0]));
points->ids[points->len++] = id;
struct wlr_touch_down_event event = {
.touch = touch,
.time_msec = time,
.touch_id = id,
};
touch_coordinates_to_absolute(seat, x, y, &event.x, &event.y);
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wl_signal_emit_mutable(&touch->events.down, &event);
}
static bool remove_touch_point(struct wlr_wl_touch_points *points, int32_t id) {
size_t i = 0;
for (; i < points->len; i++) {
if (points->ids[i] == id) {
size_t remaining = points->len - i - 1;
memmove(&points->ids[i], &points->ids[i + 1], remaining * sizeof(id));
points->len--;
return true;
}
}
return false;
}
static void touch_handle_up(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time, int32_t id) {
struct wlr_wl_seat *seat = data;
struct wlr_touch *touch = &seat->wlr_touch;
remove_touch_point(&seat->touch_points, id);
struct wlr_touch_up_event event = {
.touch = touch,
.time_msec = time,
.touch_id = id,
};
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wl_signal_emit_mutable(&touch->events.up, &event);
}
static void touch_handle_motion(void *data, struct wl_touch *wl_touch,
uint32_t time, int32_t id, wl_fixed_t x, wl_fixed_t y) {
struct wlr_wl_seat *seat = data;
struct wlr_touch *touch = &seat->wlr_touch;
struct wlr_touch_motion_event event = {
.touch = touch,
.time_msec = time,
.touch_id = id,
};
touch_coordinates_to_absolute(seat, x, y, &event.x, &event.y);
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wl_signal_emit_mutable(&touch->events.motion, &event);
}
static void touch_handle_frame(void *data, struct wl_touch *wl_touch) {
struct wlr_wl_seat *seat = data;
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wl_signal_emit_mutable(&seat->wlr_touch.events.frame, NULL);
}
static void touch_handle_cancel(void *data, struct wl_touch *wl_touch) {
struct wlr_wl_seat *seat = data;
struct wlr_touch *touch = &seat->wlr_touch;
// wayland's cancel event applies to all active touch points
for (size_t i = 0; i < seat->touch_points.len; i++) {
struct wlr_touch_cancel_event event = {
.touch = touch,
.time_msec = 0,
.touch_id = seat->touch_points.ids[i],
};
wl_signal_emit_mutable(&touch->events.cancel, &event);
}
seat->touch_points.len = 0;
}
static void touch_handle_shape(void *data, struct wl_touch *wl_touch,
int32_t id, wl_fixed_t major, wl_fixed_t minor) {
// no-op
}
static void touch_handle_orientation(void *data, struct wl_touch *wl_touch,
int32_t id, wl_fixed_t orientation) {
// no-op
}
static const struct wl_touch_listener touch_listener = {
.down = touch_handle_down,
.up = touch_handle_up,
.motion = touch_handle_motion,
.frame = touch_handle_frame,
.cancel = touch_handle_cancel,
.shape = touch_handle_shape,
.orientation = touch_handle_orientation,
};
static const struct wlr_touch_impl touch_impl = {
.name = "wl-touch",
};
void init_seat_touch(struct wlr_wl_seat *seat) {
assert(seat->wl_touch);
char name[128] = {0};
snprintf(name, sizeof(name), "wayland-touch-%s", seat->name);
wlr_touch_init(&seat->wlr_touch, &touch_impl, name);
struct wlr_wl_output *output;
wl_list_for_each(output, &seat->backend->outputs, link) {
/* Multi-output touch not supproted */
seat->wlr_touch.output_name = strdup(output->wlr_output.name);
break;
}
wl_touch_add_listener(seat->wl_touch, &touch_listener, seat);
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wl_signal_emit_mutable(&seat->backend->backend.events.new_input,
&seat->wlr_touch.base);
}
static const struct wl_seat_listener seat_listener;
bool create_wl_seat(struct wl_seat *wl_seat, struct wlr_wl_backend *wl,
uint32_t global_name) {
struct wlr_wl_seat *seat = calloc(1, sizeof(struct wlr_wl_seat));
if (!seat) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return false;
}
seat->wl_seat = wl_seat;
seat->backend = wl;
seat->global_name = global_name;
wl_list_insert(&wl->seats, &seat->link);
wl_seat_add_listener(wl_seat, &seat_listener, seat);
return true;
}
void destroy_wl_seat(struct wlr_wl_seat *seat) {
if (seat->wl_touch) {
wl_touch_release(seat->wl_touch);
wlr_touch_finish(&seat->wlr_touch);
}
if (seat->wl_pointer) {
finish_seat_pointer(seat);
}
if (seat->wl_keyboard) {
wl_keyboard_release(seat->wl_keyboard);
if (seat->backend->started) {
wlr_keyboard_finish(&seat->wlr_keyboard);
}
}
if (seat->zwp_tablet_seat_v2) {
finish_seat_tablet(seat);
}
free(seat->name);
assert(seat->wl_seat);
wl_seat_destroy(seat->wl_seat);
wl_list_remove(&seat->link);
free(seat);
}
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bool wlr_input_device_is_wl(struct wlr_input_device *dev) {
switch (dev->type) {
case WLR_INPUT_DEVICE_KEYBOARD:
return wlr_keyboard_from_input_device(dev)->impl == &keyboard_impl;
case WLR_INPUT_DEVICE_POINTER:
return wlr_pointer_from_input_device(dev)->impl == &wl_pointer_impl;
case WLR_INPUT_DEVICE_TOUCH:
return wlr_touch_from_input_device(dev)->impl == &touch_impl;
case WLR_INPUT_DEVICE_TABLET_TOOL:
return wlr_tablet_from_input_device(dev)-> impl == &wl_tablet_impl;
case WLR_INPUT_DEVICE_TABLET_PAD:
return wlr_tablet_pad_from_input_device(dev)->impl == &wl_tablet_pad_impl;
default:
return false;
}
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}
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static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
enum wl_seat_capability caps) {
struct wlr_wl_seat *seat = data;
struct wlr_wl_backend *backend = seat->backend;
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if ((caps & WL_SEAT_CAPABILITY_POINTER) && seat->wl_pointer == NULL) {
wlr_log(WLR_DEBUG, "seat '%s' offering pointer", seat->name);
seat->wl_pointer = wl_seat_get_pointer(wl_seat);
init_seat_pointer(seat);
}
if (!(caps & WL_SEAT_CAPABILITY_POINTER) && seat->wl_pointer != NULL) {
wlr_log(WLR_DEBUG, "seat '%s' dropping pointer", seat->name);
finish_seat_pointer(seat);
}
if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && seat->wl_keyboard == NULL) {
wlr_log(WLR_DEBUG, "seat '%s' offering keyboard", seat->name);
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struct wl_keyboard *wl_keyboard = wl_seat_get_keyboard(wl_seat);
seat->wl_keyboard = wl_keyboard;
if (backend->started) {
init_seat_keyboard(seat);
}
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}
if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && seat->wl_keyboard != NULL) {
wlr_log(WLR_DEBUG, "seat '%s' dropping keyboard", seat->name);
wl_keyboard_release(seat->wl_keyboard);
wlr_keyboard_finish(&seat->wlr_keyboard);
seat->wl_keyboard = NULL;
}
if ((caps & WL_SEAT_CAPABILITY_TOUCH) && seat->wl_touch == NULL) {
wlr_log(WLR_DEBUG, "seat '%s' offering touch", seat->name);
seat->wl_touch = wl_seat_get_touch(wl_seat);
if (backend->started) {
init_seat_touch(seat);
}
}
if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && seat->wl_touch != NULL) {
wlr_log(WLR_DEBUG, "seat '%s' dropping touch", seat->name);
wl_touch_release(seat->wl_touch);
wlr_touch_finish(&seat->wlr_touch);
seat->wl_touch = NULL;
}
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}
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static void seat_handle_name(void *data, struct wl_seat *wl_seat,
const char *name) {
struct wlr_wl_seat *seat = data;
free(seat->name);
seat->name = strdup(name);
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}
static const struct wl_seat_listener seat_listener = {
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.capabilities = seat_handle_capabilities,
.name = seat_handle_name,
};