Restore floating win position after mon add

Compensate the coordinate changes when adding a new monitor.

Every test so far confirms that monitors are always added to the left,
on top of the list, so every floating window's x coordinate has to be
incremented by the width of the new monitor.

1 files changed, 18 insertions, 0 deletions

diff --git a/dwl.c b/dwl.c
index 414aa59..23a7211 100644
--- a/dwl.c
+++ b/dwl.c
@@ -195,6 +195,7 @@ static void applyexclusive(struct wlr_box *usable_area, uint32_t anchor,
 		int32_t margin_bottom, int32_t margin_left);
 static void applyrules(Client *c);
 static void arrange(Monitor *m);
+static void arrangefloat(Monitor *m, int sign);
 static void arrangelayer(Monitor *m, struct wl_list *list,
 		struct wlr_box *usable_area, bool exclusive);
 static void arrangelayers(Monitor *m);
@@ -470,6 +471,17 @@ arrange(Monitor *m)
 }
 
 void
+arrangefloat(Monitor *m, int sign)
+{
+	Client *c;
+	wl_list_for_each(c, &clients, link) {
+		if (c->isfloating)
+			resize(c, c->geom.x + m->w.width * sign, c->geom.y,
+					c->geom.width, c->geom.height, 0);
+	}
+}
+
+void
 arrangelayer(Monitor *m, struct wl_list *list, struct wlr_box *usable_area, bool exclusive)
 {
 	LayerSurface *layersurface;
@@ -693,6 +705,7 @@ cleanupmon(struct wl_listener *listener, void *data)
 	free(m);
 
 	updatemons();
+	arrangefloat(m, -1);
 }
 
 void
@@ -821,6 +834,11 @@ createmon(struct wl_listener *listener, void *data)
 
 	/* When adding monitors, the geometries of all monitors must be updated */
 	updatemons();
+	wl_list_for_each(m, &mons, link) {
+		/* the first monitor in the list is the most recently added */
+		arrangefloat(m, 1);
+		return;
+	}
 }
 
 void