1 files changed, 242 insertions, 108 deletions

diff --git a/sway/lock.c b/sway/lock.c
index c4fbfe0e..2856ae67 100644
--- a/sway/lock.c
+++ b/sway/lock.c
@@ -1,5 +1,6 @@
 #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"
@@ -9,19 +10,28 @@
 #include "sway/server.h"
 #include "sway/surface.h"
 
-struct sway_session_lock_surface {
-	struct wlr_session_lock_surface_v1 *lock_surface;
+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 wlr_surface *surface;
-	struct wl_listener map;
+
+	struct wl_list link; // sway_session_lock::outputs
+
 	struct wl_listener destroy;
-	struct wl_listener surface_commit;
-	struct wl_listener output_commit;
-	struct wl_listener output_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 set_lock_focused_surface(struct wlr_surface *focused) {
-	server.session_lock.focused = focused;
+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) {
@@ -29,104 +39,189 @@ static void set_lock_focused_surface(struct wlr_surface *focused) {
 	}
 }
 
+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_surface *surf = wl_container_of(listener, surf, map);
-	if (server.session_lock.focused == NULL) {
-		set_lock_focused_surface(surf->surface);
+	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();
-	surface_enter_output(surf->surface, surf->output);
-	output_damage_whole(surf->output);
 }
 
-static void handle_surface_commit(struct wl_listener *listener, void *data) {
-	struct sway_session_lock_surface *surf = wl_container_of(listener, surf, surface_commit);
-	output_damage_surface(surf->output, 0, 0, surf->surface, false);
+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_output_commit(struct wl_listener *listener, void *data) {
+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_surface *surf = wl_container_of(listener, surf, output_commit);
+	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)) {
-		wlr_session_lock_surface_v1_configure(surf->lock_surface,
-			surf->output->width, surf->output->height);
+		lock_output_reconfigure(output);
 	}
 }
 
-static void destroy_lock_surface(struct sway_session_lock_surface *surf) {
-	// Move the seat focus to another surface if one is available
-	if (server.session_lock.focused == surf->surface) {
-		struct wlr_surface *next_focus = NULL;
+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_session_lock_surface_v1 *other;
-		wl_list_for_each(other, &server.session_lock.lock->surfaces, link) {
-			if (other != surf->lock_surface && other->surface->mapped) {
-				next_focus = other->surface;
-				break;
-			}
-		}
-		set_lock_focused_surface(next_focus);
+	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;
 	}
 
-	wl_list_remove(&surf->map.link);
-	wl_list_remove(&surf->destroy.link);
-	wl_list_remove(&surf->surface_commit.link);
-	wl_list_remove(&surf->output_commit.link);
-	wl_list_remove(&surf->output_destroy.link);
-	output_damage_whole(surf->output);
-	free(surf);
-}
+	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;
+	}
 
-static void handle_surface_destroy(struct wl_listener *listener, void *data) {
-	struct sway_session_lock_surface *surf = wl_container_of(listener, surf, destroy);
-	destroy_lock_surface(surf);
-}
+	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);
 
-static void handle_output_destroy(struct wl_listener *listener, void *data) {
-	struct sway_session_lock_surface *surf =
-		wl_container_of(listener, surf, output_destroy);
-	destroy_lock_surface(surf);
+	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 handle_new_surface(struct wl_listener *listener, void *data) {
-	struct wlr_session_lock_surface_v1 *lock_surface = data;
-	struct sway_session_lock_surface *surf = calloc(1, sizeof(*surf));
-	if (surf == NULL) {
-		return;
+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);
 	}
 
-	sway_log(SWAY_DEBUG, "new lock layer surface");
+	if (server.session_lock.lock == lock) {
+		server.session_lock.lock = NULL;
+	}
 
-	struct sway_output *output = lock_surface->output->data;
-	wlr_session_lock_surface_v1_configure(lock_surface, output->width, output->height);
-
-	surf->lock_surface = lock_surface;
-	surf->surface = lock_surface->surface;
-	surf->output = output;
-	surf->map.notify = handle_surface_map;
-	wl_signal_add(&lock_surface->surface->events.map, &surf->map);
-	surf->destroy.notify = handle_surface_destroy;
-	wl_signal_add(&lock_surface->events.destroy, &surf->destroy);
-	surf->surface_commit.notify = handle_surface_commit;
-	wl_signal_add(&surf->surface->events.commit, &surf->surface_commit);
-	surf->output_commit.notify = handle_output_commit;
-	wl_signal_add(&output->wlr_output->events.commit, &surf->output_commit);
-	surf->output_destroy.notify = handle_output_destroy;
-	wl_signal_add(&output->node.events.destroy, &surf->output_destroy);
+	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");
-	server.session_lock.locked = false;
-	server.session_lock.lock = NULL;
-	server.session_lock.focused = NULL;
 
-	wl_list_remove(&server.session_lock.lock_new_surface.link);
-	wl_list_remove(&server.session_lock.lock_unlock.link);
-	wl_list_remove(&server.session_lock.lock_destroy.link);
+	sway_session_lock_destroy(lock);
 
 	struct sway_seat *seat;
 	wl_list_for_each(seat, &server.input->seats, link) {
@@ -145,28 +240,22 @@ static void handle_unlock(struct wl_listener *listener, void *data) {
 		struct sway_output *output = root->outputs->items[i];
 		arrange_layers(output);
 	}
-
-	// redraw everything
-	for (int i = 0; i < root->outputs->length; ++i) {
-		struct sway_output *output = root->outputs->items[i];
-		output_damage_whole(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");
-	server.session_lock.lock = NULL;
-	server.session_lock.focused = NULL;
 
-	wl_list_remove(&server.session_lock.lock_new_surface.link);
-	wl_list_remove(&server.session_lock.lock_unlock.link);
-	wl_list_remove(&server.session_lock.lock_destroy.link);
-
-	// redraw everything
-	for (int i = 0; i < root->outputs->length; ++i) {
-		struct sway_output *output = root->outputs->items[i];
-		output_damage_whole(output);
+	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) {
@@ -174,44 +263,89 @@ static void handle_session_lock(struct wl_listener *listener, void *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");
-	server.session_lock.locked = true;
-	server.session_lock.lock = lock;
 
 	struct sway_seat *seat;
 	wl_list_for_each(seat, &server.input->seats, link) {
 		seat_unfocus_unless_client(seat, client);
 	}
 
-	wl_signal_add(&lock->events.new_surface, &server.session_lock.lock_new_surface);
-	wl_signal_add(&lock->events.unlock, &server.session_lock.lock_unlock);
-	wl_signal_add(&lock->events.destroy, &server.session_lock.lock_destroy);
+	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);
-
-	// redraw everything
-	for (int i = 0; i < root->outputs->length; ++i) {
-		struct sway_output *output = root->outputs->items[i];
-		output_damage_whole(output);
-	}
+	server.session_lock.lock = sway_lock;
 }
 
 static void handle_session_lock_destroy(struct wl_listener *listener, void *data) {
-	assert(server.session_lock.lock == NULL);
+	// 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.lock_new_surface.notify = handle_new_surface;
-	server.session_lock.lock_unlock.notify = handle_unlock;
-	server.session_lock.lock_destroy.notify = handle_abandon;
 	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,