91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
/***************************************************************************
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* Copyright (C) 2008-2014 by Andrzej Rybczak *
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* electricityispower@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include <boost/locale/encoding.hpp>
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#include <cassert>
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#include "utility/wide_string.h"
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std::string ToString(std::wstring ws)
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{
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return boost::locale::conv::utf_to_utf<char>(ws);
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}
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std::wstring ToWString(std::string s)
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{
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return boost::locale::conv::utf_to_utf<wchar_t>(s);
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}
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size_t wideLength(const std::wstring &ws)
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{
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int len = wcswidth(ws.c_str(), -1);
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assert(len >= 0);
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return len;
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}
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void wideCut(std::wstring &ws, size_t max_length)
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{
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size_t i = 0;
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int remained_len = max_length;
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for (; i < ws.length(); ++i)
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{
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remained_len -= wcwidth(ws[i]);
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if (remained_len < 0)
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{
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ws.resize(i);
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break;
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}
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}
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}
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std::wstring wideShorten(const std::wstring &ws, size_t max_length)
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{
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std::wstring result;
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if (wideLength(ws) > max_length)
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{
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const size_t half_max = max_length/2 - 1;
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size_t len = 0;
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// get beginning of string
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for (auto it = ws.begin(); it != ws.end(); ++it)
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{
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len += wcwidth(*it);
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if (len > half_max)
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break;
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result += *it;
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}
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len = 0;
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std::wstring end;
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// get end of string in reverse order
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for (auto it = ws.rbegin(); it != ws.rend(); ++it)
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{
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len += wcwidth(*it);
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if (len > half_max)
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break;
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end += *it;
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}
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// apply end of string to its beginning
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result += L"..";
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result.append(end.rbegin(), end.rend());
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}
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else
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result = ws;
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return result;
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}
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