From b2a7b29612142f37b4f1df04ccbe1d561be15a92 Mon Sep 17 00:00:00 2001
From: "varga%nixcorp.com"
 <varga%nixcorp.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Sat, 29 Jul 2006 05:41:47 +0000
Subject: [PATCH] Fix for bug 221361. right click context speed is very slow
 with large selections r=jan,neil sr=alecf patch by gemal

git-svn-id: svn://10.0.0.236/trunk@205711 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/suite/common/nsContextMenu.js | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/mozilla/suite/common/nsContextMenu.js b/mozilla/suite/common/nsContextMenu.js
index 38cbe1b5bfc..0e8b3679446 100644
--- a/mozilla/suite/common/nsContextMenu.js
+++ b/mozilla/suite/common/nsContextMenu.js
@@ -784,7 +784,7 @@ nsContextMenu.prototype = {
     //selected text.   Only use the first 15 chars.
     isTextSelection : function() {
         var result = false;
-        var selection = this.searchSelected();
+        var selection = this.searchSelected(16);
 
         var bundle = srGetStrBundle("chrome://communicator/locale/contentAreaCommands.properties");
 
@@ -803,13 +803,21 @@ nsContextMenu.prototype = {
         return result;
     },
     
-    searchSelected : function() {
+    searchSelected : function( charlen ) {
         var focusedWindow = document.commandDispatcher.focusedWindow;
         var searchStr = focusedWindow.__proto__.getSelection.call(focusedWindow);
         searchStr = searchStr.toString();
-        searchStr = searchStr.replace( /^\s+/, "" );
-        searchStr = searchStr.replace(/(\n|\r|\t)+/g, " ");
-        searchStr = searchStr.replace(/\s+$/,"");
+        // searching for more than 150 chars makes no sense
+        if (!charlen)
+            charlen = 150;
+        if (charlen < searchStr.length) {
+            // only use the first charlen important chars. see bug 221361
+            var pattern = new RegExp("^(?:\\s*.){0," + charlen + "}");
+            pattern.test(searchStr);
+            searchStr = RegExp.lastMatch;
+        }
+        searchStr = searchStr.replace(/\s*(.*?)\s*$/, "$1");
+        searchStr = searchStr.replace(/\s+/g, " ");
         return searchStr;
     },