Merge pull request #1745 from swaywm/swaybar-hotplugging

Handle output removal on swaybar

client/pool-buffer.c

@@ -79,7 +79,7 @@ static struct pool_buffer *create_buffer(struct wl_shm *shm,
 	return buf;
 }
 
-static void destroy_buffer(struct pool_buffer *buffer) {
+void destroy_buffer(struct pool_buffer *buffer) {
 	if (buffer->buffer) {
 		wl_buffer_destroy(buffer->buffer);
 	}

include/pool-buffer.h

@@ -17,5 +17,6 @@ struct pool_buffer {
 
 struct pool_buffer *get_next_buffer(struct wl_shm *shm,
 		struct pool_buffer pool[static 2], uint32_t width, uint32_t height);
+void destroy_buffer(struct pool_buffer *buffer);
 
 #endif

include/swaybar/bar.h

@@ -49,6 +49,7 @@ struct swaybar_output {
 	struct wl_output *output;
 	struct wl_surface *surface;
 	struct zwlr_layer_surface_v1 *layer_surface;
+	uint32_t wl_name;
 
 	struct wl_list workspaces;
 	struct wl_list hotspots;

sway/tree/container.c

@@ -64,8 +64,10 @@ static void container_close_notify(struct sway_container *container) {
 		return;
 	}
 	// TODO send ipc event type based on the container type
+	if (container->type == C_VIEW || container->type == C_WORKSPACE) {
 		ipc_event_window(container, "close");
 	}
+}
 
 struct sway_container *container_create(enum sway_container_type type) {
 	// next id starts at 1 because 0 is assigned to root_container in layout.c

swaybar/bar.c

@@ -34,6 +34,34 @@ static void bar_init(struct swaybar *bar) {
 	wl_list_init(&bar->outputs);
 }
 
+static void swaybar_output_free(struct swaybar_output *output) {
+	if (!output) {
+		return;
+	}
+	wlr_log(L_DEBUG, "Removing output %s", output->name);
+	zwlr_layer_surface_v1_destroy(output->layer_surface);
+	wl_surface_destroy(output->surface);
+	wl_output_destroy(output->output);
+	destroy_buffer(&output->buffers[0]);
+	destroy_buffer(&output->buffers[1]);
+	struct swaybar_workspace *ws, *ws_tmp;
+	wl_list_for_each_safe(ws, ws_tmp, &output->workspaces, link) {
+		wl_list_remove(&ws->link);
+		free(ws->name);
+		free(ws);
+	}
+	struct swaybar_hotspot *hotspot, *hotspot_tmp;
+	wl_list_for_each_safe(hotspot, hotspot_tmp, &output->hotspots, link) {
+		if (hotspot->destroy) {
+			hotspot->destroy(hotspot->data);
+		}
+		free(hotspot);
+	}
+	wl_list_remove(&output->link);
+	free(output->name);
+	free(output);
+}
+
 static void layer_surface_configure(void *data,
 		struct zwlr_layer_surface_v1 *surface,
 		uint32_t serial, uint32_t width, uint32_t height) {
@@ -46,10 +74,8 @@ static void layer_surface_configure(void *data,
 
 static void layer_surface_closed(void *_output,
 		struct zwlr_layer_surface_v1 *surface) {
-	// TODO: Deal with hotplugging
 	struct swaybar_output *output = _output;
-	zwlr_layer_surface_v1_destroy(output->layer_surface);
-	wl_surface_destroy(output->surface);
+	swaybar_output_free(output);
 }
 
 struct zwlr_layer_surface_v1_listener layer_surface_listener = {
@@ -261,6 +287,7 @@ static void handle_global(void *data, struct wl_registry *registry,
 		wl_output_add_listener(output->output, &output_listener, output);
 		output->scale = 1;
 		output->index = index++;
+		output->wl_name = name;
 		wl_list_init(&output->workspaces);
 		wl_list_init(&output->hotspots);
 		wl_list_insert(&bar->outputs, &output->link);
@@ -272,7 +299,14 @@ static void handle_global(void *data, struct wl_registry *registry,
 
 static void handle_global_remove(void *data, struct wl_registry *registry,
 		uint32_t name) {
-	// who cares
+	struct swaybar *bar = data;
+	struct swaybar_output *output, *tmp;
+	wl_list_for_each_safe(output, tmp, &bar->outputs, link) {
+		if (output->wl_name == name) {
+			swaybar_output_free(output);
+			break;
+		}
+	}
 }
 
 static const struct wl_registry_listener registry_listener = {

swaybar/ipc.c

@@ -367,5 +367,5 @@ bool handle_ipc_readable(struct swaybar *bar) {
 		return false;
 	}
 	free_ipc_response(resp);
-	return true;
+	return false;
 }

swaybar/render.c

@@ -421,8 +421,6 @@ static uint32_t render_workspace_button(cairo_t *cairo,
 static uint32_t render_to_cairo(cairo_t *cairo,
 		struct swaybar *bar, struct swaybar_output *output) {
 	struct swaybar_config *config = bar->config;
-	wlr_log(L_DEBUG, "output %p", output);
-
 	cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
 	if (output->focused) {
 		cairo_set_source_u32(cairo, config->colors.focused_background);