Implement iterators per container type

This introduces the following `for_each` functions:

* root_for_each_workspace
* root_for_each_container
* output_for_each_workspace
* output_for_each_container
* workspace_for_each_container

And introduces the following `find` functions:

* root_find_output
* root_find_workspace
* root_find_container
* output_find_workspace
* output_find_container
* workspace_find_container
* container_find_child

And removes the following functions:

* container_descendants
* container_for_each_descendant
* container_find

This change is preparing the way for demoting sway_container. Eventually
these functions will accept and return sway_outputs, sway_workspaces and
sway_containers (meaning a C_CONTAINER or C_VIEW).

This change also makes it easy to handle abnormalities like the
workspace floating list, root's scratchpad list and (once implemented)
root's saved workspaces list for when there's no connected outputs.

1 files changed, 1 insertions, 12 deletions

diff --git a/sway/config.c b/sway/config.c
index bd14222a..642abbac 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -822,18 +822,7 @@ void config_update_font_height(bool recalculate) {
 	size_t prev_max_height = config->font_height;
 	config->font_height = 0;
 
-	container_for_each_descendant(&root_container,
-			find_font_height_iterator, &recalculate);
-
-	// Also consider floating views
-	for (int i = 0; i < root_container.children->length; ++i) {
-		struct sway_container *output = root_container.children->items[i];
-		for (int j = 0; j < output->children->length; ++j) {
-			struct sway_container *ws = output->children->items[j];
-			container_for_each_descendant(ws->sway_workspace->floating,
-					find_font_height_iterator, &recalculate);
-		}
-	}
+	root_for_each_container(find_font_height_iterator, &recalculate);
 
 	if (config->font_height != prev_max_height) {
 		arrange_windows(&root_container);