1 files changed, 7 insertions, 1 deletions
diff --git a/ext/fg/js/source-image.js b/ext/fg/js/source-image.js
index bbc0ba46..319f25fe 100644
--- a/ext/fg/js/source-image.js
+++ b/ext/fg/js/source-image.js
@@ -32,8 +32,14 @@ class TextSourceImage {
         return this.img.getAttribute('alt') || '';
     }
 
-    setLength(length) {
+    setStartOffset(length) {
+        // NOP
+        return 0;
+    }
+
+    setEndOffset(length) {
         this.length = length;
+        return length;
     }
 
     containsPoint(point) {