From 1319c478bb86dab33c0cfa2dd1d7f2e2325a4b12 Mon Sep 17 00:00:00 2001
From: c-spencer <cs560@cam.ac.uk>
Date: Mon, 23 May 2011 11:31:36 +0100
Subject: [PATCH] Assume no state change from previously known state in
 bgTokenizer (#256)

---
 lib/ace/background_tokenizer.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/ace/background_tokenizer.js b/lib/ace/background_tokenizer.js
index 2e289de7..eb23bf74 100644
--- a/lib/ace/background_tokenizer.js
+++ b/lib/ace/background_tokenizer.js
@@ -144,6 +144,9 @@ var BackgroundTokenizer = function(tokenizer, editor) {
         } else if (firstRow == 0) {
             state = "start";
             doCache = true;
+        } else if (this.lines.length > 0) {
+            // Guess that we haven't changed state.
+            state = this.lines[this.lines.length-1].state;
         }
 
         var lines = this.doc.getLines(firstRow, lastRow);