From dac9c9c72b4ae1796fa212b78f418666a52ecb2e Mon Sep 17 00:00:00 2001
From: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Date: Mon, 12 Aug 2019 01:18:24 +0200
Subject: [PATCH] layer_shell: Guard against negative exclusive zone

This can happen with surfaces that set negative margins.
---
 sway/desktop/layer_shell.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sway/desktop/layer_shell.c b/sway/desktop/layer_shell.c
index ed00b2825..34ba55922 100644
--- a/sway/desktop/layer_shell.c
+++ b/sway/desktop/layer_shell.c
@@ -68,7 +68,7 @@ static void apply_exclusive(struct wlr_box *usable_area,
 		},
 	};
 	for (size_t i = 0; i < sizeof(edges) / sizeof(edges[0]); ++i) {
-		if ((anchor & edges[i].anchors) == edges[i].anchors) {
+		if ((anchor & edges[i].anchors) == edges[i].anchors && exclusive + edges[i].margin > 0) {
 			if (edges[i].positive_axis) {
 				*edges[i].positive_axis += exclusive + edges[i].margin;
 			}