From be957fd2c1c27c4c8bc062cabedab9263fc5bdbd Mon Sep 17 00:00:00 2001
From: Julian Viereck <julian.viereck@gmail.com>
Date: Sun, 9 Jan 2011 19:46:37 +0100
Subject: [PATCH] Clamp column returned by Document.screenToDocumentPosition

---
 lib/ace/document.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/ace/document.js b/lib/ace/document.js
index a0bc4a5f..488f690a 100644
--- a/lib/ace/document.js
+++ b/lib/ace/document.js
@@ -1027,10 +1027,14 @@ var Document = function(text, mode) {
             row -= wrapData[docRow].length + 1;
             docRow ++;
         }
+
         var docColumn = column +
             (docRow < linesCount ? wrapData[docRow][row - 1] || 0 : 0);
 
-        if (this.lines[docRow]) {
+        // Clamp docColumn.
+        if (docRow < linesCount && wrapData[docRow][row]) {
+            docColumn =  Math.min(docColumn, wrapData[docRow][row]);
+        } else if (this.lines[docRow]) {
              docColumn = Math.min(docColumn, this.lines[docRow].length);
         }