Fix possible lock-up because of endless loop during rendering

Author: kern

CHANGELOG.adoc

@@ -2,6 +2,10 @@
 = Changelog of Brackets AsciiDoc Preview
 :experimental:
 
+== Version 1.2.3
+
+* Fix possible lock-up because of endless loop during rendering.
+
 == Version 1.2.2
 
 * Improved mapping of preview location to source line numbers and vice versa.

main.js

@@ -410,7 +410,7 @@ define(function (require, exports, module) {
       do {
         line--;
         $elem = doc.find('[class~=data-line-' + line + ']');
-      } while ($elem.length === 0);
+      } while (line >= 0 && $elem.length === 0);
 
       var blockPos = $elem.position();
       if (blockPos !== undefined) {

package.json

@@ -3,7 +3,7 @@
     "title": "AsciiDoc Preview",
     "description": "Live preview for AsciiDoc documents.",
     "homepage": "https://github.com/asciidoctor/brackets-asciidoc-preview",
-    "version": "1.2.2",
+    "version": "1.2.3",
     "author": "Thomas Kern (https://github.com/nerk)",
     "license": "MIT",
     "engines": {