Make gaps implementation consistent with i3-gaps

This changes our gaps implementation to behave like i3-gaps.

Our previous implementation allowed you to set gaps on a per container
basis. This isn't supported by i3-gaps and doesn't seem to have a
practical use case. The gaps_outer and gaps_inner properties on
containers are now removed as they just read the gaps_inner from the
workspace.

`gaps inner|outer <px>` no longer changes the gaps for all workspaces.
It only sets defaults for new workspaces.

`gaps inner|outer current|workspace|all set|plus|minus <px>` is now
runtime only, and the workspace option is now removed. `current` now
sets gaps for the current workspace as opposed to the current container.

`workspace <ws> gaps inner|outer <px>` is now implemented. This sets
defaults for a workspace.

This also fixes a bug where changing the layout of a split container
from linear to tabbed would cause gaps to not be applied to it until you
switch to another workspace and back.

2 files changed, 17 insertions, 3 deletions

diff --git a/sway/tree/container.c b/sway/tree/container.c
index baaa82fd..e329f835 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -1022,7 +1022,7 @@ void container_add_gaps(struct sway_container *c) {
 
 	struct sway_workspace *ws = c->workspace;
 
-	c->current_gaps = ws->has_gaps ? ws->gaps_inner : config->gaps_inner;
+	c->current_gaps = ws->gaps_inner;
 	c->x += c->current_gaps;
 	c->y += c->current_gaps;
 	c->width -= 2 * c->current_gaps;
diff --git a/sway/tree/workspace.c b/sway/tree/workspace.c
index d65a3e4c..9dd5c815 100644
--- a/sway/tree/workspace.c
+++ b/sway/tree/workspace.c
@@ -68,6 +68,20 @@ struct sway_workspace *workspace_create(struct sway_output *output,
 	ws->output_priority = create_list();
 	workspace_output_add_priority(ws, output);
 
+	ws->gaps_outer = config->gaps_outer;
+	ws->gaps_inner = config->gaps_inner;
+	if (name) {
+		struct workspace_config *wsc = workspace_find_config(name);
+		if (wsc) {
+			if (wsc->gaps_outer != -1) {
+				ws->gaps_outer = wsc->gaps_outer;
+			}
+			if (wsc->gaps_inner != -1) {
+				ws->gaps_inner = wsc->gaps_inner;
+			}
+		}
+	}
+
 	output_add_workspace(output, ws);
 	output_sort_workspaces(output);
 
@@ -632,13 +646,13 @@ void workspace_add_gaps(struct sway_workspace *ws) {
 		return;
 	}
 
-	ws->current_gaps = ws->has_gaps ? ws->gaps_outer : config->gaps_outer;
+	ws->current_gaps = ws->gaps_outer;
 
 	if (ws->layout == L_TABBED || ws->layout == L_STACKED) {
 		// We have to add inner gaps for this, because children of tabbed and
 		// stacked containers don't apply their own gaps - they assume the
 		// tabbed/stacked container is using gaps.
-		ws->current_gaps += ws->has_gaps ? ws->gaps_inner : config->gaps_inner;
+		ws->current_gaps += ws->gaps_inner;
 	}
 
 	ws->x += ws->current_gaps;