Implement scratchpad

Implements the following commands:

* move scratchpad
* scratchpad show
* [criteria] scratchpad show

Also fixes these:

* Fix memory leak when executing command with criteria
(use `list_free(views)` instead of `free(views)`)
* Fix crash when running `move to` with no further arguments

1 files changed, 8 insertions, 0 deletions

diff --git a/sway/criteria.c b/sway/criteria.c
index e2b248de..6af97d5b 100644
--- a/sway/criteria.c
+++ b/sway/criteria.c
@@ -225,6 +225,14 @@ list_t *criteria_get_views(struct criteria *criteria) {
 	};
 	container_for_each_descendant_dfs(&root_container,
 		criteria_get_views_iterator, &data);
+
+	// Scratchpad items which are hidden are not in the tree.
+	for (int i = 0; i < server.scratchpad->length; ++i) {
+		struct sway_container *con = server.scratchpad->items[i];
+		if (!con->parent) {
+			criteria_get_views_iterator(con, &data);
+		}
+	}
 	return matches;
 }