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, 1 insertions, 4 deletions

diff --git a/sway/desktop/render.c b/sway/desktop/render.c
index 7c48d0d2..aa70903e 100644
--- a/sway/desktop/render.c
+++ b/sway/desktop/render.c
@@ -754,8 +754,6 @@ static void render_container(struct sway_output *output,
         case L_TABBED:
                 render_container_tabbed(output, damage, con, parent_focused);
                 break;
-        case L_FLOATING:
-                sway_assert(false, "Didn't expect to see floating here");
         }
 }
 
@@ -806,8 +804,7 @@ static void render_floating(struct sway_output *soutput,
                         if (!workspace_is_visible(ws)) {
                                 continue;
                         }
-                        list_t *floating =
-                                ws->current.ws_floating->current.children;
+                        list_t *floating = ws->current.ws_floating;
                         for (int k = 0; k < floating->length; ++k) {
                                 struct sway_container *floater = floating->items[k];
                                 render_floating_container(soutput, damage, floater);