From fa963722a79c26c1642bbf81a2e153bd0c1a3fe8 Mon Sep 17 00:00:00 2001
From: toasted-nutbread <toasted-nutbread@users.noreply.github.com>
Date: Fri, 8 Nov 2019 19:24:33 -0500
Subject: Fix seekForward and seekBackward not handling length=0 case correctly

---
 ext/fg/js/source.js | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'ext/fg')

diff --git a/ext/fg/js/source.js b/ext/fg/js/source.js
index c3da9f46..5be521fa 100644
--- a/ext/fg/js/source.js
+++ b/ext/fg/js/source.js
@@ -108,6 +108,10 @@ class TextSourceRange {
 
     static seekForward(node, offset, length) {
         const state = {node, offset, remainder: length, content: ''};
+        if (length <= 0) {
+            return state;
+        }
+
         const TEXT_NODE = Node.TEXT_NODE;
         const ELEMENT_NODE = Node.ELEMENT_NODE;
         let resetOffset = false;
@@ -166,6 +170,10 @@ class TextSourceRange {
 
     static seekBackward(node, offset, length) {
         const state = {node, offset, remainder: length, content: ''};
+        if (length <= 0) {
+            return state;
+        }
+
         const TEXT_NODE = Node.TEXT_NODE;
         const ELEMENT_NODE = Node.ELEMENT_NODE;
         let resetOffset = false;
-- 
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