Mode [un]locLengthString() methods to support/qstring_helpers

[features.git] / src / support / qstring_helpers.h

diff --git a/src/support/qstring_helpers.h b/src/support/qstring_helpers.h
index d1525de8f4b9536bfe24af0898c3b72f0e2f4ac7..905343e77d568d164055dcc0c609bc6127a48dbf 100644 (file)
--- a/src/support/qstring_helpers.h
+++ b/src/support/qstring_helpers.h
@@ -12,25 +12,23 @@
 #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);
 
 
 /**
@@ -39,40 +37,14 @@ inline QString const 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)
+/// Is \p c a valid utf16 char?
+inline bool is_utf16(char_type c)
 {
-       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)
-{
-       // 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);
 }
 
 
@@ -82,32 +54,15 @@ inline QChar const ucs4_to_qchar(char_type const ucs4)
  * 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
@@ -115,8 +70,7 @@ inline void ucs4_to_qstring(char_type const * str, size_t ls, QString & s)
  * 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
@@ -124,7 +78,28 @@ docstring const qstring_to_ucs4(QString const & qstr);
  * 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);
+
+/// Method to replace dot with localized decimal separator
+QString locLengthString(QString const & str);
+
+/// Same for doscstring
+docstring locLengthDocString(docstring const str);
+
+/// Method to replace localized decimal separator by dot
+QString unlocLengthString(QString const & str);
 
 } // namespace lyx