Replace hacky L_FLOATING container with a list

Workspaces previously had a magical `workspace->floating` container,
which had a layout of L_FLOATING and whose children were actual floating
views. This allowed some conveniences, but was a hacky solution because
the container has to be exempt from focus, coordinate transactions with
the workspace, and omit emitting IPC events (which we didn't do).

This commit changes it to be a list directly in the sway_workspace. The
L_FLOATING layout is no longer used so this has been removed as well.

* Fixes incorrect check in the swap command (it checked if the
containers had the L_FLOATING layout, but this layout applied to the
magical container).
* Introduces workspace_add_floating

1 files changed, 14 insertions, 15 deletions

diff --git a/sway/tree/layout.c b/sway/tree/layout.c
index 49ec806e..2f22a3dd 100644
--- a/sway/tree/layout.c
+++ b/sway/tree/layout.c
@@ -117,9 +117,11 @@ struct sway_container *container_remove_child(struct sway_container *child) {
 	}
 
 	struct sway_container *parent = child->parent;
-	int index = index_child(child);
+	list_t *list = container_is_floating(child) ?
+		parent->sway_workspace->floating : parent->children;
+	int index = list_find(list, child);
 	if (index != -1) {
-		list_del(parent->children, index);
+		list_del(list, index);
 	}
 	child->parent = NULL;
 	container_notify_subtree_changed(parent);
@@ -160,7 +162,8 @@ void container_move_to(struct sway_container *container,
 		struct sway_container *old_output =
 			container_parent(container, C_OUTPUT);
 		old_parent = container_remove_child(container);
-		container_add_child(new_ws->sway_workspace->floating, container);
+		workspace_add_floating(new_ws, container);
+		container_handle_fullscreen_reparent(container, old_parent);
 		// If changing output, center it within the workspace
 		if (old_output != new_ws->parent && !container->is_fullscreen) {
 			container_floating_move_to_center(container);
@@ -431,9 +434,6 @@ void container_move(struct sway_container *container,
 				if ((index == parent->children->length - 1 && offs > 0)
 						|| (index == 0 && offs < 0)) {
 					if (current->parent == container->parent) {
-						if (parent->parent->layout == L_FLOATING) {
-							return;
-						}
 						if (!parent->is_fullscreen &&
 								(parent->layout == L_TABBED ||
 								 parent->layout == L_STACKED)) {
@@ -457,14 +457,10 @@ void container_move(struct sway_container *container,
 					sibling = parent->children->items[index + offs];
 					wlr_log(WLR_DEBUG, "Selecting sibling id:%zd", sibling->id);
 				}
-			} else if (!parent->is_fullscreen &&
-					parent->parent->layout != L_FLOATING &&
-					(parent->layout == L_TABBED ||
+			} else if (!parent->is_fullscreen && (parent->layout == L_TABBED ||
 						parent->layout == L_STACKED)) {
 				move_out_of_tabs_stacks(container, current, move_dir, offs);
 				return;
-			} else if (parent->parent->layout == L_FLOATING) {
-				return;
 			} else {
 				wlr_log(WLR_DEBUG, "Moving up to find a parallel container");
 				current = current->parent;
@@ -802,13 +798,15 @@ struct sway_container *container_replace_child(struct sway_container *child,
 	if (parent == NULL) {
 		return NULL;
 	}
-	int i = index_child(child);
 
-	// TODO floating
+	list_t *list = container_is_floating(child) ?
+		parent->sway_workspace->floating : parent->children;
+	int i = list_find(list, child);
+
 	if (new_child->parent) {
 		container_remove_child(new_child);
 	}
-	parent->children->items[i] = new_child;
+	list->items[i] = new_child;
 	new_child->parent = parent;
 	child->parent = NULL;
 
@@ -973,7 +971,8 @@ void container_swap(struct sway_container *con1, struct sway_container *con2) {
 				"Cannot swap ancestor and descendant")) {
 		return;
 	}
-	if (!sway_assert(con1->layout != L_FLOATING && con2->layout != L_FLOATING,
+	if (!sway_assert(!container_is_floating(con1)
+				&& !container_is_floating(con2),
 				"Swapping with floating containers is not supported")) {
 		return;
 	}