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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 LLUrlEntrySL());
registerUrl(new LLUrlEntrySLLabel());
}
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;
}
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 (text.find("://") == std::string::npos)
{
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);
}
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