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/**
* @file lltextparser.cpp
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "lltextparser.h"
#include "llsd.h"
#include "llsdserialize.h"
#include "llerror.h"
#include "lluuid.h"
#include "llstring.h"
#include "message.h"
#include "llmath.h"
#include "v4color.h"
#include "lldir.h"
//
// Member Functions
//
LLTextParser::LLTextParser()
: mLoaded(false)
{}
S32 LLTextParser::findPattern(const std::string &text, LLSD highlight)
{
if (!highlight.has("pattern")) return -1;
std::string pattern=std::string(highlight["pattern"]);
std::string ltext=text;
if (!(bool)highlight["case_sensitive"])
{
ltext = utf8str_tolower(text);
pattern= utf8str_tolower(pattern);
}
size_t found=std::string::npos;
switch ((S32)highlight["condition"])
{
case CONTAINS:
found = ltext.find(pattern);
break;
case MATCHES:
found = (! ltext.compare(pattern) ? 0 : std::string::npos);
break;
case STARTS_WITH:
found = (! ltext.find(pattern) ? 0 : std::string::npos);
break;
case ENDS_WITH:
auto pos = ltext.rfind(pattern);
if (pos != std::string::npos && pos >= 0 && (ltext.length() - pattern.length() == pos)) found = pos;
break;
}
return static_cast<S32>(found);
}
LLSD LLTextParser::parsePartialLineHighlights(const std::string &text, const LLColor4 &color, EHighlightPosition part, S32 index)
{
loadKeywords();
//evil recursive string atomizer.
LLSD ret_llsd, start_llsd, middle_llsd, end_llsd;
for (S32 i=index;i<mHighlights.size();i++)
{
S32 condition = mHighlights[i]["condition"];
if ((S32)mHighlights[i]["highlight"]==PART && condition!=MATCHES)
{
if ( (condition==STARTS_WITH && part==START) ||
(condition==ENDS_WITH && part==END) ||
condition==CONTAINS || part==WHOLE )
{
S32 start = findPattern(text,mHighlights[i]);
if (start >= 0 )
{
auto end = std::string(mHighlights[i]["pattern"]).length();
auto len = text.length();
EHighlightPosition newpart;
if (start==0)
{
start_llsd[0]["text"] =text.substr(0,end);
start_llsd[0]["color"]=mHighlights[i]["color"];
if (end < len)
{
if (part==END || part==WHOLE) newpart=END; else newpart=MIDDLE;
end_llsd=parsePartialLineHighlights(text.substr( end ),color,newpart,i);
}
}
else
{
if (part==START || part==WHOLE) newpart=START; else newpart=MIDDLE;
start_llsd=parsePartialLineHighlights(text.substr(0,start),color,newpart,i+1);
if (end < len)
{
middle_llsd[0]["text"] =text.substr(start,end);
middle_llsd[0]["color"]=mHighlights[i]["color"];
if (part==END || part==WHOLE) newpart=END; else newpart=MIDDLE;
end_llsd=parsePartialLineHighlights(text.substr( (start+end) ),color,newpart,i);
}
else
{
end_llsd[0]["text"] =text.substr(start,end);
end_llsd[0]["color"]=mHighlights[i]["color"];
}
}
S32 retcount=0;
//FIXME These loops should be wrapped into a subroutine.
for (LLSD::array_iterator iter = start_llsd.beginArray();
iter != start_llsd.endArray();++iter)
{
LLSD highlight = *iter;
ret_llsd[retcount++]=highlight;
}
for (LLSD::array_iterator iter = middle_llsd.beginArray();
iter != middle_llsd.endArray();++iter)
{
LLSD highlight = *iter;
ret_llsd[retcount++]=highlight;
}
for (LLSD::array_iterator iter = end_llsd.beginArray();
iter != end_llsd.endArray();++iter)
{
LLSD highlight = *iter;
ret_llsd[retcount++]=highlight;
}
return ret_llsd;
}
}
}
}
//No patterns found. Just send back what was passed in.
ret_llsd[0]["text"] =text;
LLSD color_sd = color.getValue();
ret_llsd[0]["color"]=color_sd;
return ret_llsd;
}
bool LLTextParser::parseFullLineHighlights(const std::string &text, LLColor4 *color)
{
loadKeywords();
for (S32 i=0;i<mHighlights.size();i++)
{
if ((S32)mHighlights[i]["highlight"]==ALL || (S32)mHighlights[i]["condition"]==MATCHES)
{
if (findPattern(text,mHighlights[i]) >= 0 )
{
LLSD color_llsd = mHighlights[i]["color"];
color->setValue(color_llsd);
return true;
}
}
}
return false; //No matches found.
}
std::string LLTextParser::getFileName()
{
std::string path=gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, "");
if (!path.empty())
{
path = gDirUtilp->getExpandedFilename(LL_PATH_PER_SL_ACCOUNT, "highlights.xml");
}
return path;
}
void LLTextParser::loadKeywords()
{
if (mLoaded)
{// keywords already loaded
return;
}
std::string filename=getFileName();
if (!filename.empty())
{
llifstream file;
file.open(filename.c_str());
if (file.is_open())
{
LLSDSerialize::fromXML(mHighlights, file);
}
file.close();
mLoaded = true;
}
}
bool LLTextParser::saveToDisk(LLSD highlights)
{
mHighlights=highlights;
std::string filename=getFileName();
if (filename.empty())
{
LL_WARNS() << "LLTextParser::saveToDisk() no valid user directory." << LL_ENDL;
return false;
}
llofstream file;
file.open(filename.c_str());
LLSDSerialize::toPrettyXML(mHighlights, file);
file.close();
return true;
}
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