From bf130e36e08dfbf5731c0e6fb84c38e37126baec Mon Sep 17 00:00:00 2001
From: "Joshua A. Horton" <joshua_horton@sil.org>
Date: Fri, 5 Apr 2024 14:09:14 +0700
Subject: [PATCH] fix(web): nearest-key row lookup when touch moves
 out-of-bounds

---
 web/src/engine/osk/src/keyboard-layout/oskLayerGroup.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/web/src/engine/osk/src/keyboard-layout/oskLayerGroup.ts b/web/src/engine/osk/src/keyboard-layout/oskLayerGroup.ts
index 1803269ef7..589ca96f8c 100644
--- a/web/src/engine/osk/src/keyboard-layout/oskLayerGroup.ts
+++ b/web/src/engine/osk/src/keyboard-layout/oskLayerGroup.ts
@@ -198,7 +198,7 @@ export default class OSKLayerGroup {
       Assumes there is no fine-tuning of the row ranges to be done - each takes a perfect
       fraction of the overall layer height without any padding above or below.
     */
-    const rowIndex = Math.floor(proportionalCoords.y * layer.rows.length);
+    const rowIndex = Math.max(0, Math.min(layer.rows.length-1, Math.floor(proportionalCoords.y * layer.rows.length)));
     const row = layer.rows[rowIndex];
 
     // Assertion:  row no longer `null`.