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diff --git a/indra/llui/llurlregistry.cpp b/indra/llui/llurlregistry.cpp
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+/** 
+ * @file llurlregistry.cpp
+ * @author Martin Reddy
+ * @brief Contains a set of Url types that can be matched in a string
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+#include "llurlregistry.h"
+
+#include <boost/regex.hpp>
+
+// default dummy callback that ignores any label updates from the server
+void LLUrlRegistryNullCallback(const std::string &url, const std::string &label)
+{
+}
+
+LLUrlRegistry::LLUrlRegistry()
+{
+	// Urls are matched in the order that they were registered
+	registerUrl(new LLUrlEntrySLURL());
+	registerUrl(new LLUrlEntryHTTP());
+	registerUrl(new LLUrlEntryHTTPLabel());
+	registerUrl(new LLUrlEntryAgent());
+	registerUrl(new LLUrlEntryGroup());
+	registerUrl(new LLUrlEntryParcel());
+	registerUrl(new LLUrlEntryTeleport());
+	registerUrl(new LLUrlEntryWorldMap());
+	registerUrl(new LLUrlEntryPlace());
+	registerUrl(new LLUrlEntryInventory());
+	//LLUrlEntrySL and LLUrlEntrySLLabel have more common pattern, 
+	//so it should be registered in the end of list
+	registerUrl(new LLUrlEntrySL());
+	registerUrl(new LLUrlEntrySLLabel());
+	// most common pattern is a URL without any protocol,
+	// e.g., "secondlife.com"
+	registerUrl(new LLUrlEntryHTTPNoProtocol());	
+}
+
+LLUrlRegistry::~LLUrlRegistry()
+{
+	// free all of the LLUrlEntryBase objects we are holding
+	std::vector<LLUrlEntryBase *>::iterator it;
+	for (it = mUrlEntry.begin(); it != mUrlEntry.end(); ++it)
+	{
+		delete *it;
+	}
+}
+
+void LLUrlRegistry::registerUrl(LLUrlEntryBase *url)
+{
+	if (url)
+	{
+		mUrlEntry.push_back(url);
+	}
+}
+
+static bool matchRegex(const char *text, boost::regex regex, U32 &start, U32 &end)
+{
+	boost::cmatch result;
+	bool found;
+
+	// regex_search can potentially throw an exception, so check for it
+	try
+	{
+		found = boost::regex_search(text, result, regex);
+	}
+	catch (std::runtime_error &)
+	{
+		return false;
+	}
+
+	if (! found)
+	{
+		return false;
+	}
+
+	// return the first/last character offset for the matched substring
+	start = static_cast<U32>(result[0].first - text);
+	end = static_cast<U32>(result[0].second - text) - 1;
+
+	// we allow certain punctuation to terminate a Url but not match it,
+	// e.g., "http://foo.com/." should just match "http://foo.com/"
+	if (text[end] == '.' || text[end] == ',')
+	{
+		end--;
+	}
+	// ignore a terminating ')' when Url contains no matching '('
+	// see DEV-19842 for details
+	else if (text[end] == ')' && std::string(text+start, end-start).find('(') == std::string::npos)
+	{
+		end--;
+	}
+
+	return true;
+}
+
+static bool stringHasUrl(const std::string &text)
+{
+	// fast heuristic test for a URL in a string. This is used
+	// to avoid lots of costly regex calls, BUT it needs to be
+	// kept in sync with the LLUrlEntry regexes we support.
+	return (text.find("://") != std::string::npos ||
+			text.find("www.") != std::string::npos ||
+			text.find(".com") != std::string::npos ||
+			text.find(".net") != std::string::npos ||
+			text.find(".edu") != std::string::npos ||
+			text.find(".org") != std::string::npos);
+}
+
+bool LLUrlRegistry::findUrl(const std::string &text, LLUrlMatch &match, const LLUrlLabelCallback &cb)
+{
+	// avoid costly regexes if there is clearly no URL in the text
+	if (! stringHasUrl(text))
+	{
+		return false;
+	}
+
+	// find the first matching regex from all url entries in the registry
+	U32 match_start = 0, match_end = 0;
+	LLUrlEntryBase *match_entry = NULL;
+
+	std::vector<LLUrlEntryBase *>::iterator it;
+	for (it = mUrlEntry.begin(); it != mUrlEntry.end(); ++it)
+	{
+		LLUrlEntryBase *url_entry = *it;
+
+		U32 start = 0, end = 0;
+		if (matchRegex(text.c_str(), url_entry->getPattern(), start, end))
+		{
+			// does this match occur in the string before any other match
+			if (start < match_start || match_entry == NULL)
+			{
+				match_start = start;
+				match_end = end;
+				match_entry = url_entry;
+			}
+		}
+	}
+	
+	// did we find a match? if so, return its details in the match object
+	if (match_entry)
+	{
+		// fill in the LLUrlMatch object and return it
+		std::string url = text.substr(match_start, match_end - match_start + 1);
+		match.setValues(match_start, match_end,
+						match_entry->getUrl(url),
+						match_entry->getLabel(url, cb),
+						match_entry->getTooltip(),
+						match_entry->getIcon(),
+						match_entry->getColor(),
+						match_entry->getMenuName(),
+						match_entry->getLocation(url));
+		return true;
+	}
+
+	return false;
+}
+
+bool LLUrlRegistry::findUrl(const LLWString &text, LLUrlMatch &match, const LLUrlLabelCallback &cb)
+{
+	// boost::regex_search() only works on char or wchar_t
+	// types, but wchar_t is only 2-bytes on Win32 (not 4).
+	// So we use UTF-8 to make this work the same everywhere.
+	std::string utf8_text = wstring_to_utf8str(text);
+	if (findUrl(utf8_text, match, cb))
+	{
+		// we cannot blindly return the start/end offsets from
+		// the UTF-8 string because it is a variable-length
+		// character encoding, so we need to update the start
+		// and end values to be correct for the wide string.
+		LLWString wurl = utf8str_to_wstring(match.getUrl());
+		S32 start = text.find(wurl);
+		if (start == std::string::npos)
+		{
+			return false;
+		}
+		S32 end = start + wurl.size() - 1;
+
+		match.setValues(start, end, match.getUrl(), 
+			match.getLabel(), match.getTooltip(),
+			match.getIcon(), match.getColor(),
+			match.getMenuName(), match.getLocation());
+		return true;
+	}
+	return false;
+}
+
+bool LLUrlRegistry::hasUrl(const std::string &text)
+{
+	LLUrlMatch match;
+	return findUrl(text, match);
+}
+
+bool LLUrlRegistry::hasUrl(const LLWString &text)
+{
+	LLUrlMatch match;
+	return findUrl(text, match);
+}
+
+bool LLUrlRegistry::isUrl(const std::string &text)
+{
+	LLUrlMatch match;
+	if (findUrl(text, match))
+	{
+		return (match.getStart() == 0 && match.getEnd() >= text.size()-1);
+	}
+	return false;
+}
+
+bool LLUrlRegistry::isUrl(const LLWString &text)
+{
+	LLUrlMatch match;
+	if (findUrl(text, match))
+	{
+		return (match.getStart() == 0 && match.getEnd() >= text.size()-1);
+	}
+	return false;
+}