[xml-fold addon] Clip iterator range to editor range

Closes #4018
codemirror · Sep 15, 2016 · 7db967f · 7db967f
1 parent 3d89b71
commit 7db967f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/addon/fold/xml-fold.js b/addon/fold/xml-fold.js
@@ -21,8 +21,8 @@
   function Iter(cm, line, ch, range) {
     this.line = line; this.ch = ch;
     this.cm = cm; this.text = cm.getLine(line);
-    this.min = range ? range.from : cm.firstLine();
-    this.max = range ? range.to - 1 : cm.lastLine();
+    this.min = range ? Math.max(range.from, cm.firstLine()) : cm.firstLine();
+    this.max = range ? Math.min(range.to - 1, cm.lastLine()) : cm.lastLine();
   }
 
   function tagAt(iter, ch) {