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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21792 a592a061-630c-0410-9148-cb99ea01b6c8
96 lines
2.2 KiB
C++
96 lines
2.2 KiB
C++
// -*- C++ -*-
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/**
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* \file qstring_helpers.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Dekel Tsur
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef QSTRING_HELPERS_H
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#define QSTRING_HELPERS_H
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#include "support/docstring.h"
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#include <QString>
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#include <QVector>
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namespace lyx {
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/**
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* toqstr - convert a UTF8 encoded char * into a QString
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*
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* This should not be used, since all possibly non-ASCII stuff should be
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* stored in a docstring.
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*/
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inline QString const toqstr(char const * str)
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{
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return QString::fromUtf8(str);
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}
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/**
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* toqstr - convert a UTF8 encoded std::string into a QString
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*
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* This should not be used, since all possibly non-ASCII stuff should be
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* stored in a docstring.
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*/
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inline QString const toqstr(std::string const & str)
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{
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return toqstr(str.c_str());
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}
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/// Is \p c a valid utf16 char?
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inline bool is_utf16(char_type c)
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{
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// 0xd800 ... 0xdfff is the range of surrogate pairs.
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return c < 0xd800 || (c > 0xdfff && c < 0x10000);
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}
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/**
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* toqstr - convert a UCS4 encoded docstring into a QString
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*
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* This is the preferred method of converting anything that possibly
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* contains non-ASCII stuff to QString.
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*/
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inline QString const toqstr(docstring const & ucs4)
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{
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// If possible we let qt do the work, since this version does not
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// need to be superfast.
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return QString::fromUcs4(reinterpret_cast<uint const *>(ucs4.data()), ucs4.length());
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}
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/**
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* qstring_to_ucs4 - convert a QString into a UCS4 encoded docstring
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*
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* This is the preferred method of converting anything that possibly
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* contains non-ASCII stuff to docstring.
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*/
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inline docstring const qstring_to_ucs4(QString const & qstr)
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{
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if (qstr.isEmpty())
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return docstring();
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QVector<uint> const ucs4 = qstr.toUcs4();
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return docstring((char_type const *)(ucs4.constData()), ucs4.size());
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}
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/**
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* fromqstr - convert a QString into a UTF8 encoded std::string
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*
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* This should not be used except for output to lyxerr, since all possibly
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* non-ASCII stuff should be stored in a docstring.
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*/
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inline std::string const fromqstr(QString const & str)
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{
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return str.isEmpty() ? std::string() : std::string(str.toUtf8());
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}
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} // namespace lyx
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#endif // QSTRING_HELPERS_H
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