sway/sway/lock.c
Alexander Orzechowski 5f0801b6f2 container: Don't track outputs
The scene graph abstraction does this for us
2024-01-18 18:36:54 +03:00

355 lines
11 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <wlr/types/wlr_scene.h>
#include "log.h"
#include "sway/input/cursor.h"
#include "sway/input/keyboard.h"
#include "sway/input/seat.h"
#include "sway/layers.h"
#include "sway/output.h"
#include "sway/server.h"
struct sway_session_lock_output {
struct wlr_scene_tree *tree;
struct wlr_scene_rect *background;
struct sway_session_lock *lock;
struct sway_output *output;
struct wl_list link; // sway_session_lock::outputs
struct wl_listener destroy;
struct wl_listener commit;
struct wlr_session_lock_surface_v1 *surface;
// invalid if surface is NULL
struct wl_listener surface_destroy;
struct wl_listener surface_map;
};
static void focus_surface(struct sway_session_lock *lock,
struct wlr_surface *focused) {
lock->focused = focused;
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
seat_set_focus_surface(seat, focused, false);
}
}
static void refocus_output(struct sway_session_lock_output *output) {
// Move the seat focus to another surface if one is available
if (output->lock->focused == output->surface->surface) {
struct wlr_surface *next_focus = NULL;
struct sway_session_lock_output *candidate;
wl_list_for_each(candidate, &output->lock->outputs, link) {
if (candidate == output || !candidate->surface) {
continue;
}
if (candidate->surface->surface->mapped) {
next_focus = candidate->surface->surface;
break;
}
}
focus_surface(output->lock, next_focus);
}
}
static void handle_surface_map(struct wl_listener *listener, void *data) {
struct sway_session_lock_output *surf = wl_container_of(listener, surf, surface_map);
if (surf->lock->focused == NULL) {
focus_surface(surf->lock, surf->surface->surface);
}
cursor_rebase_all();
}
static void handle_surface_destroy(struct wl_listener *listener, void *data) {
struct sway_session_lock_output *output =
wl_container_of(listener, output, surface_destroy);
refocus_output(output);
sway_assert(output->surface, "Trying to destroy a surface that the lock doesn't think exists");
output->surface = NULL;
wl_list_remove(&output->surface_destroy.link);
wl_list_remove(&output->surface_map.link);
}
static void lock_output_reconfigure(struct sway_session_lock_output *output) {
int width = output->output->width;
int height = output->output->height;
wlr_scene_rect_set_size(output->background, width, height);
if (output->surface) {
wlr_session_lock_surface_v1_configure(output->surface, width, height);
}
}
static void handle_new_surface(struct wl_listener *listener, void *data) {
struct sway_session_lock *lock = wl_container_of(listener, lock, new_surface);
struct wlr_session_lock_surface_v1 *lock_surface = data;
struct sway_output *output = lock_surface->output->data;
sway_log(SWAY_DEBUG, "new lock layer surface");
struct sway_session_lock_output *current_lock_output, *lock_output = NULL;
wl_list_for_each(current_lock_output, &lock->outputs, link) {
if (current_lock_output->output == output) {
lock_output = current_lock_output;
break;
}
}
sway_assert(lock_output, "Couldn't find output to lock");
sway_assert(!lock_output->surface, "Tried to reassign a surface to an existing output");
lock_output->surface = lock_surface;
wlr_scene_subsurface_tree_create(lock_output->tree, lock_surface->surface);
lock_output->surface_destroy.notify = handle_surface_destroy;
wl_signal_add(&lock_surface->events.destroy, &lock_output->surface_destroy);
lock_output->surface_map.notify = handle_surface_map;
wl_signal_add(&lock_surface->surface->events.map, &lock_output->surface_map);
lock_output_reconfigure(lock_output);
}
static void sway_session_lock_output_destroy(struct sway_session_lock_output *output) {
if (output->surface) {
refocus_output(output);
wl_list_remove(&output->surface_destroy.link);
wl_list_remove(&output->surface_map.link);
}
wl_list_remove(&output->commit.link);
wl_list_remove(&output->destroy.link);
wl_list_remove(&output->link);
free(output);
}
static void lock_node_handle_destroy(struct wl_listener *listener, void *data) {
struct sway_session_lock_output *output =
wl_container_of(listener, output, destroy);
sway_session_lock_output_destroy(output);
}
static void lock_output_handle_commit(struct wl_listener *listener, void *data) {
struct wlr_output_event_commit *event = data;
struct sway_session_lock_output *output =
wl_container_of(listener, output, commit);
if (event->state->committed & (
WLR_OUTPUT_STATE_MODE |
WLR_OUTPUT_STATE_SCALE |
WLR_OUTPUT_STATE_TRANSFORM)) {
lock_output_reconfigure(output);
}
}
static struct sway_session_lock_output *session_lock_output_create(
struct sway_session_lock *lock, struct sway_output *output) {
struct sway_session_lock_output *lock_output = calloc(1, sizeof(*lock_output));
if (!lock_output) {
sway_log(SWAY_ERROR, "failed to allocate a session lock output");
return NULL;
}
struct wlr_scene_tree *tree = wlr_scene_tree_create(output->layers.session_lock);
if (!tree) {
sway_log(SWAY_ERROR, "failed to allocate a session lock output scene tree");
free(lock_output);
return NULL;
}
struct wlr_scene_rect *background = wlr_scene_rect_create(tree, 0, 0, (float[4]){
lock->abandoned ? 1.f : 0.f,
0.f,
0.f,
1.f,
});
if (!background) {
sway_log(SWAY_ERROR, "failed to allocate a session lock output scene background");
wlr_scene_node_destroy(&tree->node);
free(lock_output);
return NULL;
}
lock_output->output = output;
lock_output->tree = tree;
lock_output->background = background;
lock_output->lock = lock;
lock_output->destroy.notify = lock_node_handle_destroy;
wl_signal_add(&tree->node.events.destroy, &lock_output->destroy);
lock_output->commit.notify = lock_output_handle_commit;
wl_signal_add(&output->wlr_output->events.commit, &lock_output->commit);
lock_output_reconfigure(lock_output);
wl_list_insert(&lock->outputs, &lock_output->link);
return lock_output;
}
static void sway_session_lock_destroy(struct sway_session_lock* lock) {
struct sway_session_lock_output *lock_output, *tmp_lock_output;
wl_list_for_each_safe(lock_output, tmp_lock_output, &lock->outputs, link) {
// destroying the node will also destroy the whole lock output
wlr_scene_node_destroy(&lock_output->tree->node);
}
if (server.session_lock.lock == lock) {
server.session_lock.lock = NULL;
}
if (!lock->abandoned) {
wl_list_remove(&lock->destroy.link);
wl_list_remove(&lock->unlock.link);
wl_list_remove(&lock->new_surface.link);
}
free(lock);
}
static void handle_unlock(struct wl_listener *listener, void *data) {
struct sway_session_lock *lock = wl_container_of(listener, lock, unlock);
sway_log(SWAY_DEBUG, "session unlocked");
sway_session_lock_destroy(lock);
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
// copied from seat_set_focus_layer -- deduplicate?
struct sway_node *previous = seat_get_focus_inactive(seat, &root->node);
if (previous) {
// Hack to get seat to re-focus the return value of get_focus
seat_set_focus(seat, NULL);
seat_set_focus(seat, previous);
}
}
// Triggers a refocus of the topmost surface layer if necessary
// TODO: Make layer surface focus per-output based on cursor position
for (int i = 0; i < root->outputs->length; ++i) {
struct sway_output *output = root->outputs->items[i];
arrange_layers(output);
}
}
static void handle_abandon(struct wl_listener *listener, void *data) {
struct sway_session_lock *lock = wl_container_of(listener, lock, destroy);
sway_log(SWAY_INFO, "session lock abandoned");
struct sway_session_lock_output *lock_output;
wl_list_for_each(lock_output, &lock->outputs, link) {
wlr_scene_rect_set_color(lock_output->background,
(float[4]){ 1.f, 0.f, 0.f, 1.f });
}
lock->abandoned = true;
wl_list_remove(&lock->destroy.link);
wl_list_remove(&lock->unlock.link);
wl_list_remove(&lock->new_surface.link);
}
static void handle_session_lock(struct wl_listener *listener, void *data) {
struct wlr_session_lock_v1 *lock = data;
struct wl_client *client = wl_resource_get_client(lock->resource);
if (server.session_lock.lock) {
if (server.session_lock.lock->abandoned) {
sway_log(SWAY_INFO, "Replacing abandoned lock");
sway_session_lock_destroy(server.session_lock.lock);
} else {
sway_log(SWAY_ERROR, "Cannot lock an already locked session");
wlr_session_lock_v1_destroy(lock);
return;
}
}
struct sway_session_lock *sway_lock = calloc(1, sizeof(*sway_lock));
if (!sway_lock) {
sway_log(SWAY_ERROR, "failed to allocate a session lock object");
wlr_session_lock_v1_destroy(lock);
return;
}
wl_list_init(&sway_lock->outputs);
sway_log(SWAY_DEBUG, "session locked");
struct sway_seat *seat;
wl_list_for_each(seat, &server.input->seats, link) {
seat_unfocus_unless_client(seat, client);
}
struct sway_output *output;
wl_list_for_each(output, &root->all_outputs, link) {
sway_session_lock_add_output(sway_lock, output);
}
sway_lock->new_surface.notify = handle_new_surface;
wl_signal_add(&lock->events.new_surface, &sway_lock->new_surface);
sway_lock->unlock.notify = handle_unlock;
wl_signal_add(&lock->events.unlock, &sway_lock->unlock);
sway_lock->destroy.notify = handle_abandon;
wl_signal_add(&lock->events.destroy, &sway_lock->destroy);
wlr_session_lock_v1_send_locked(lock);
server.session_lock.lock = sway_lock;
}
static void handle_session_lock_destroy(struct wl_listener *listener, void *data) {
// if the server shuts down while a lock is active, destroy the lock
if (server.session_lock.lock) {
sway_session_lock_destroy(server.session_lock.lock);
}
wl_list_remove(&server.session_lock.new_lock.link);
wl_list_remove(&server.session_lock.manager_destroy.link);
server.session_lock.manager = NULL;
}
void sway_session_lock_add_output(struct sway_session_lock *lock,
struct sway_output *output) {
struct sway_session_lock_output *lock_output =
session_lock_output_create(lock, output);
// if we run out of memory while trying to lock the screen, the best we
// can do is kill the sway process. Security conscious users will have
// the sway session fall back to a login shell.
if (!lock_output) {
sway_log(SWAY_ERROR, "aborting: failed to allocate a lock output");
abort();
}
}
bool sway_session_lock_has_surface(struct sway_session_lock *lock,
struct wlr_surface *surface) {
struct sway_session_lock_output *lock_output;
wl_list_for_each(lock_output, &lock->outputs, link) {
if (lock_output->surface && lock_output->surface->surface == surface) {
return true;
}
}
return false;
}
void sway_session_lock_init(void) {
server.session_lock.manager = wlr_session_lock_manager_v1_create(server.wl_display);
server.session_lock.new_lock.notify = handle_session_lock;
server.session_lock.manager_destroy.notify = handle_session_lock_destroy;
wl_signal_add(&server.session_lock.manager->events.new_lock,
&server.session_lock.new_lock);
wl_signal_add(&server.session_lock.manager->events.destroy,
&server.session_lock.manager_destroy);
}