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97 lines
2.8 KiB
97 lines
2.8 KiB
/*************************************************************************** |
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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>(std::move(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>(std::move(s)); |
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} |
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size_t wideLength(const std::wstring &ws) |
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{ |
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size_t result = 0; |
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for (const auto &wc : ws) |
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{ |
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int len = wcwidth(wc); |
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if (len < 0) |
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++result; |
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else |
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result += len; |
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} |
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return result; |
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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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