#ifndef QSTRING_HELPERS_H
#define QSTRING_HELPERS_H
-#include "support/docstring.h"
+#include "support/strfwd.h"
-#include <QChar>
-#include <QString>
-
-#include <boost/assert.hpp>
+class QString;
namespace lyx {
+class LyXErr;
+
+LyXErr & operator<<(LyXErr &, QString const &);
+
/**
* toqstr - convert a UTF8 encoded char * into a QString
*
* This should not be used, since all possibly non-ASCII stuff should be
* stored in a docstring.
*/
-inline QString const toqstr(char const * str)
-{
- return QString::fromUtf8(str);
-}
+QString toqstr(char const * str);
/**
* This should not be used, since all possibly non-ASCII stuff should be
* stored in a docstring.
*/
-inline QString const toqstr(std::string const & str)
-{
- return toqstr(str.c_str());
-}
+QString toqstr(std::string const & str);
-/**
- * Convert a QChar into a UCS4 character.
- * This is a hack (it does only make sense for the common part of the UCS4
- * and UTF16 encodings) and should not be used.
- * This does only exist because of performance reasons (a real conversion
- * using iconv is too slow on windows).
- */
-inline char_type const qchar_to_ucs4(QChar const & qchar)
-{
- return static_cast<char_type>(qchar.unicode());
-}
-
-
-/**
- * Convert a UCS4 character into a QChar.
- * This is a hack (it does only make sense for the common part of the UCS4
- * and UTF16 encodings) and should not be used.
- * This does only exist because of performance reasons (a real conversion
- * using iconv is too slow on windows).
- */
-inline QChar const ucs4_to_qchar(char_type const ucs4)
+/// Is \p c a valid utf16 char?
+inline bool is_utf16(char_type c)
{
- // FIXME: The following cast is not a real conversion but it work
- // for the ucs2 subrange of unicode. Instead of an assertion we should
- // return some special characters that indicates that its display is
- // not supported.
- BOOST_ASSERT(ucs4 < 65536);
- return QChar(static_cast<unsigned short>(ucs4));
+ // 0xd800 ... 0xdfff is the range of surrogate pairs.
+ return c < 0xd800 || (c > 0xdfff && c < 0x10000);
}
* This is the preferred method of converting anything that possibly
* contains non-ASCII stuff to QString.
*/
-#if QT_VERSION >= 0x040200
-inline QString const toqstr(docstring const & ucs4)
-{
- // If possible we let qt do the work, since this version does not
- // need to be superfast.
- return QString::fromUcs4(reinterpret_cast<uint const *>(ucs4.data()), ucs4.length());
-}
-#else
-QString const toqstr(docstring const & ucs4);
-#endif
-
+QString toqstr(docstring const & ucs4);
/**
- * ucs4_to_qstring - convert a UCS4 encoded char_type * into a QString
+ * toqstr - convert a UCS4 encoded character into a QString
*
- * This is a hack for the painter and font metrics and should not be used
- * elsewhere. Since it uses ucs4_to_qchar it has the same limitations.
+ * This is the preferred method of converting anything that possibly
+ * contains non-ASCII stuff to QString.
*/
-inline void ucs4_to_qstring(char_type const * str, size_t ls, QString & s)
-{
- int i = static_cast<int>(ls);
- s.resize(i);
- for (; --i >= 0;)
- s[i] = ucs4_to_qchar(str[i]);
-}
-
+QString toqstr(char_type ucs4);
/**
* qstring_to_ucs4 - convert a QString into a UCS4 encoded docstring
* This is the preferred method of converting anything that possibly
* contains non-ASCII stuff to docstring.
*/
-docstring const qstring_to_ucs4(QString const & qstr);
-
+docstring qstring_to_ucs4(QString const & qstr);
/**
* fromqstr - convert a QString into a UTF8 encoded std::string
* This should not be used except for output to lyxerr, since all possibly
* non-ASCII stuff should be stored in a docstring.
*/
-std::string const fromqstr(QString const & str);
+std::string fromqstr(QString const & str);
+
+/**
+ * constructs a regex to filter on consecutive characters
+ * matches lower- and uppercase on lowercase characters,
+ * and just uppercase for uppercase
+ */
+QString charFilterRegExp(QString const & filter);
+
+/**
+ * as above, but constructs a capturing regex for a sequence of characters
+ */
+QString charFilterRegExpC(QString const & filter);
} // namespace lyx