/* * Copyright (C) 1999-2009 Lorenzo Bettini, http://www.lorenzobettini.it * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "chartranslator.h" #include using namespace std; namespace srchilite { CharTranslator::CharTranslator(PreFormatterPtr f) : PreFormatter(f), counter(0), reg_exp(0), bol(true) { } CharTranslator::~CharTranslator() { if (reg_exp) delete reg_exp; } void CharTranslator::set_translation(const std::string &to_translate, const std::string &translate_into) { // here we only buffer the translation regular expression ostringstream exp; exp << (translation_exp.size() ? "|" : "") << "(" << to_translate << ")"; translation_exp += exp.str(); ostringstream format; // the translation format corresponding to "to_translate" format << "(?" << ++counter << translate_into << ")"; translation_format += format.str(); } const string CharTranslator::doPreformat(const string &text) { if (!translation_exp.size()) { return text; } // we finally build the actual regular expression if (!reg_exp) reg_exp = new boost::regex(translation_exp); boost::match_flag_type flags = boost::match_default | boost::format_all; if (!bol) flags |= boost::match_not_bol; // if we're not at the beginning of the line, then we must not match the // beginning of the string as the beginning of a line std::ostringstream preformat_text(std::ios::out | std::ios::binary); std::ostream_iterator oi(preformat_text); boost::regex_replace(oi, text.begin(), text.end(), *reg_exp, translation_format, flags); // keep track of the fact that we begin a new line if (text.find('\n') != string::npos) bol = true; else bol = false; return preformat_text.str(); } }