data-device: make sources inert, rename cancel to destroy

include/wlr/types/wlr_data_device.h

@@ -55,7 +55,7 @@ struct wlr_data_source_impl {
 		int32_t fd);
 	void (*accept)(struct wlr_data_source *source, uint32_t serial,
 		const char *mime_type);
-	void (*cancel)(struct wlr_data_source *source);
+	void (*destroy)(struct wlr_data_source *source);
 
 	void (*dnd_drop)(struct wlr_data_source *source);
 	void (*dnd_finish)(struct wlr_data_source *source);
@@ -186,11 +186,6 @@ void wlr_seat_set_selection(struct wlr_seat *seat,
 void wlr_data_source_init(struct wlr_data_source *source,
 	const struct wlr_data_source_impl *impl);
 
-/**
- * Finishes the data source.
- */
-void wlr_data_source_finish(struct wlr_data_source *source);
-
 /**
  * Sends the data as the specified MIME type over the passed file descriptor,
  * then close it.
@@ -207,9 +202,9 @@ void wlr_data_source_accept(struct wlr_data_source *source, uint32_t serial,
 
 /**
  * Notifies the data source it is no longer valid and should be destroyed. That
- * potentially destroys immediately the data source.
+ * destroys immediately the data source.
  */
-void wlr_data_source_cancel(struct wlr_data_source *source);
+void wlr_data_source_destroy(struct wlr_data_source *source);
 
 /**
  * Notifies the data source that the drop operation was performed. This does not

types/data_device/wlr_data_device.c

@@ -155,7 +155,7 @@ void wlr_seat_set_selection(struct wlr_seat *seat,
 		struct wlr_data_source *source, uint32_t serial) {
 	if (seat->selection_source) {
 		wl_list_remove(&seat->selection_source_destroy.link);
-		wlr_data_source_cancel(seat->selection_source);
+		wlr_data_source_destroy(seat->selection_source);
 		seat->selection_source = NULL;
 	}
 

types/data_device/wlr_data_source.c

@@ -40,20 +40,6 @@ void wlr_data_source_init(struct wlr_data_source *source,
 	source->actions = -1;
 }
 
-void wlr_data_source_finish(struct wlr_data_source *source) {
-	if (source == NULL) {
-		return;
-	}
-
-	wlr_signal_emit_safe(&source->events.destroy, source);
-
-	char **p;
-	wl_array_for_each(p, &source->mime_types) {
-		free(*p);
-	}
-	wl_array_release(&source->mime_types);
-}
-
 void wlr_data_source_send(struct wlr_data_source *source, const char *mime_type,
 		int32_t fd) {
 	source->impl->send(source, mime_type, fd);
@@ -67,9 +53,23 @@ void wlr_data_source_accept(struct wlr_data_source *source, uint32_t serial,
 	}
 }
 
-void wlr_data_source_cancel(struct wlr_data_source *source) {
-	if (source->impl->cancel) {
-		source->impl->cancel(source);
+void wlr_data_source_destroy(struct wlr_data_source *source) {
+	if (source == NULL) {
+		return;
+	}
+
+	wlr_signal_emit_safe(&source->events.destroy, source);
+
+	char **p;
+	wl_array_for_each(p, &source->mime_types) {
+		free(*p);
+	}
+	wl_array_release(&source->mime_types);
+
+	if (source->impl->destroy) {
+		source->impl->destroy(source);
+	} else {
+		free(source);
 	}
 }
 
@@ -127,10 +127,12 @@ static void client_data_source_send(struct wlr_data_source *wlr_source,
 	close(fd);
 }
 
-static void client_data_source_cancel(struct wlr_data_source *wlr_source) {
+static void client_data_source_destroy(struct wlr_data_source *wlr_source) {
 	struct wlr_client_data_source *source =
 		client_data_source_from_wlr_data_source(wlr_source);
 	wl_data_source_send_cancelled(source->resource);
+	wl_resource_set_user_data(source->resource, NULL);
+	free(source);
 }
 
 static void client_data_source_dnd_drop(struct wlr_data_source *wlr_source) {
@@ -167,6 +169,9 @@ static void data_source_set_actions(struct wl_client *client,
 		struct wl_resource *resource, uint32_t dnd_actions) {
 	struct wlr_client_data_source *source =
 		client_data_source_from_resource(resource);
+	if (source == NULL) {
+		return;
+	}
 
 	if (source->source.actions >= 0) {
 		wl_resource_post_error(source->resource,
@@ -196,6 +201,13 @@ static void data_source_offer(struct wl_client *client,
 		struct wl_resource *resource, const char *mime_type) {
 	struct wlr_client_data_source *source =
 		client_data_source_from_resource(resource);
+	if (source == NULL) {
+		return;
+	}
+	if (source->finalized) {
+		wlr_log(WLR_DEBUG, "offering additional MIME type after "
+			"wl_data_device.set_selection");
+	}
 
 	char **p = wl_array_add(&source->source.mime_types, sizeof(*p));
 	if (p) {
@@ -210,17 +222,18 @@ static void data_source_offer(struct wl_client *client,
 }
 
 static const struct wl_data_source_interface data_source_impl = {
-	.offer = data_source_offer,
 	.destroy = data_source_destroy,
+	.offer = data_source_offer,
 	.set_actions = data_source_set_actions,
 };
 
 static void data_source_handle_resource_destroy(struct wl_resource *resource) {
 	struct wlr_client_data_source *source =
 		client_data_source_from_resource(resource);
-	wlr_data_source_finish(&source->source);
-	wl_list_remove(wl_resource_get_link(source->resource));
-	free(source);
+	if (source != NULL) {
+		wlr_data_source_destroy(&source->source);
+	}
+	wl_list_remove(wl_resource_get_link(resource));
 }
 
 struct wlr_client_data_source *client_data_source_create(
@@ -245,7 +258,7 @@ struct wlr_client_data_source *client_data_source_create(
 
 	source->impl.accept = client_data_source_accept;
 	source->impl.send = client_data_source_send;
-	source->impl.cancel = client_data_source_cancel;
+	source->impl.destroy = client_data_source_destroy;
 
 	if (wl_resource_get_version(source->resource) >=
 			WL_DATA_SOURCE_DND_DROP_PERFORMED_SINCE_VERSION) {

types/data_device/wlr_drag.c

@@ -174,7 +174,7 @@ static uint32_t drag_handle_pointer_button(struct wlr_seat_pointer_grab *grab,
 			};
 			wlr_signal_emit_safe(&drag->events.drop, &event);
 		} else if (drag->source->impl->dnd_finish) {
-			wlr_data_source_cancel(drag->source);
+			wlr_data_source_destroy(drag->source);
 		}
 	}
 

types/seat/wlr_seat.c

@@ -159,7 +159,7 @@ void wlr_seat_destroy(struct wlr_seat *seat) {
 
 	if (seat->selection_source) {
 		wl_list_remove(&seat->selection_source_destroy.link);
-		wlr_data_source_cancel(seat->selection_source);
+		wlr_data_source_destroy(seat->selection_source);
 		seat->selection_source = NULL;
 	}
 

xwayland/selection/incoming.c

@@ -203,17 +203,16 @@ static void data_source_send(struct wlr_data_source *wlr_source,
 		mime_type, fd);
 }
 
-static void data_source_cancel(struct wlr_data_source *wlr_source) {
+static void data_source_destroy(struct wlr_data_source *wlr_source) {
 	struct x11_data_source *source =
 		data_source_from_wlr_data_source(wlr_source);
-	wlr_data_source_finish(&source->base);
 	wl_array_release(&source->mime_types_atoms);
 	free(source);
 }
 
 static const struct wlr_data_source_impl data_source_impl = {
 	.send = data_source_send,
-	.cancel = data_source_cancel,
+	.destroy = data_source_destroy,
 };
 
 struct x11_primary_selection_source {
@@ -353,7 +352,7 @@ static void xwm_selection_get_targets(struct wlr_xwm_selection *selection) {
 			wlr_seat_request_set_selection(xwm->seat, &source->base,
 				wl_display_next_serial(xwm->xwayland->wl_display));
 		} else {
-			wlr_data_source_cancel(&source->base);
+			wlr_data_source_destroy(&source->base);
 		}
 	} else if (selection == &xwm->primary_selection) {
 		struct x11_primary_selection_source *source =