From 4dbc23ff1ca0c3cc601c6ea011d4ec0a294dd7b2 Mon Sep 17 00:00:00 2001
From: wojciechkepka <wojtek.kepka@protonmail.com>
Date: Wed, 9 Jun 2021 18:21:58 +0200
Subject: [PATCH] Fix documentation popup panic

---
 helix-term/src/ui/popup.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/helix-term/src/ui/popup.rs b/helix-term/src/ui/popup.rs
index 015d5c9b5..ca349403a 100644
--- a/helix-term/src/ui/popup.rs
+++ b/helix-term/src/ui/popup.rs
@@ -125,13 +125,13 @@ impl<T: Component> Component for Popup<T> {
         let mut rel_x = position.col as u16;
         let mut rel_y = position.row as u16;
         if viewport.width <= rel_x + width {
-            rel_x -= ((rel_x + width) - viewport.width)
+            rel_x = rel_x.saturating_sub((rel_x + width).saturating_sub(viewport.width));
         };
 
         // TODO: be able to specify orientation preference. We want above for most popups, below
         // for menus/autocomplete.
         if height <= rel_y {
-            rel_y -= height // position above point
+            rel_y = rel_y.saturating_sub(height) // position above point
         } else {
             rel_y += 1 // position below point
         }