workspace: Learn sticky.

A floating window that's sticky will move to the new active workspace
whenever the workspace on the same output changes.

1 files changed, 21 insertions, 1 deletions

diff --git a/sway/workspace.c b/sway/workspace.c
index f18a691f..6c9a39e0 100644
--- a/sway/workspace.c
+++ b/sway/workspace.c
@@ -221,11 +221,31 @@ bool workspace_switch(swayc_t *workspace) {
                 strcpy(prev_workspace_name, active_ws->name);
         }
 
+        // move sticky containers
+        if (swayc_parent_by_type(active_ws, C_OUTPUT) == swayc_parent_by_type(workspace, C_OUTPUT)) {
+                // don't change list while traversing it, use intermediate list instead
+                list_t *stickies = create_list();
+                for (int i = 0; i < active_ws->floating->length; i++) {
+                        swayc_t *cont = active_ws->floating->items[i];
+                        if (cont->sticky) {
+                                list_add(stickies, cont);
+                        }
+                }
+                for (int i = 0; i < stickies->length; i++) {
+                        swayc_t *cont = stickies->items[i];
+                        sway_log(L_DEBUG, "Moving sticky container %p to %p:%s",
+                                        cont, workspace, workspace->name);
+                        swayc_t *parent = remove_child(cont);
+                        add_floating(workspace, cont);
+                        // Destroy old container if we need to
+                        destroy_container(parent);
+                }
+                list_free(stickies);
+        }
         sway_log(L_DEBUG, "Switching to workspace %p:%s", workspace, workspace->name);
         if (!set_focused_container(get_focused_view(workspace))) {
                 return false;
         }
         arrange_windows(workspace, -1, -1);
-
         return true;
 }