6d93e28adf
Comparisons didn't work correctly in the other direction as they were not reversed as needed. Fix this by adding wxDEFINE_COMPARISON_REV() macro which defines comparisons in terms of the reverse operations and use it for both wxUniChar and wxUniCharRef. Closes #14547. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72268 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
346 lines
13 KiB
C++
346 lines
13 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Name: wx/unichar.h
|
|
// Purpose: wxUniChar and wxUniCharRef classes
|
|
// Author: Vaclav Slavik
|
|
// Created: 2007-03-19
|
|
// RCS-ID: $Id$
|
|
// Copyright: (c) 2007 REA Elektronik GmbH
|
|
// Licence: wxWindows licence
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _WX_UNICHAR_H_
|
|
#define _WX_UNICHAR_H_
|
|
|
|
#include "wx/defs.h"
|
|
#include "wx/chartype.h"
|
|
#include "wx/stringimpl.h"
|
|
|
|
class WXDLLIMPEXP_FWD_BASE wxUniCharRef;
|
|
class WXDLLIMPEXP_FWD_BASE wxString;
|
|
|
|
// This class represents single Unicode character. It can be converted to
|
|
// and from char or wchar_t and implements commonly used character operations.
|
|
class WXDLLIMPEXP_BASE wxUniChar
|
|
{
|
|
public:
|
|
// NB: this is not wchar_t on purpose, it needs to represent the entire
|
|
// Unicode code points range and wchar_t may be too small for that
|
|
// (e.g. on Win32 where wchar_t* is encoded in UTF-16)
|
|
typedef wxUint32 value_type;
|
|
|
|
wxUniChar() : m_value(0) {}
|
|
|
|
// Create the character from 8bit character value encoded in the current
|
|
// locale's charset.
|
|
wxUniChar(char c) { m_value = From8bit(c); }
|
|
wxUniChar(unsigned char c) { m_value = From8bit((char)c); }
|
|
|
|
// Create the character from a wchar_t character value.
|
|
#if wxWCHAR_T_IS_REAL_TYPE
|
|
wxUniChar(wchar_t c) { m_value = c; }
|
|
#endif
|
|
|
|
wxUniChar(int c) { m_value = c; }
|
|
wxUniChar(unsigned int c) { m_value = c; }
|
|
wxUniChar(long int c) { m_value = c; }
|
|
wxUniChar(unsigned long int c) { m_value = c; }
|
|
wxUniChar(short int c) { m_value = c; }
|
|
wxUniChar(unsigned short int c) { m_value = c; }
|
|
|
|
wxUniChar(const wxUniCharRef& c);
|
|
|
|
// Returns Unicode code point value of the character
|
|
value_type GetValue() const { return m_value; }
|
|
|
|
#if wxUSE_UNICODE_UTF8
|
|
// buffer for single UTF-8 character
|
|
struct Utf8CharBuffer
|
|
{
|
|
char data[5];
|
|
operator const char*() const { return data; }
|
|
};
|
|
|
|
// returns the character encoded as UTF-8
|
|
// (NB: implemented in stringops.cpp)
|
|
Utf8CharBuffer AsUTF8() const;
|
|
#endif // wxUSE_UNICODE_UTF8
|
|
|
|
// Returns true if the character is an ASCII character:
|
|
bool IsAscii() const { return m_value < 0x80; }
|
|
|
|
// Returns true if the character is representable as a single byte in the
|
|
// current locale encoding and return this byte in output argument c (which
|
|
// must be non-NULL)
|
|
bool GetAsChar(char *c) const
|
|
{
|
|
#if wxUSE_UNICODE
|
|
if ( !IsAscii() )
|
|
{
|
|
#if !wxUSE_UTF8_LOCALE_ONLY
|
|
if ( GetAsHi8bit(m_value, c) )
|
|
return true;
|
|
#endif // !wxUSE_UTF8_LOCALE_ONLY
|
|
|
|
return false;
|
|
}
|
|
#endif // wxUSE_UNICODE
|
|
|
|
*c = wx_truncate_cast(char, m_value);
|
|
return true;
|
|
}
|
|
|
|
// Conversions to char and wchar_t types: all of those are needed to be
|
|
// able to pass wxUniChars to verious standard narrow and wide character
|
|
// functions
|
|
operator char() const { return To8bit(m_value); }
|
|
operator unsigned char() const { return (unsigned char)To8bit(m_value); }
|
|
#if wxWCHAR_T_IS_REAL_TYPE
|
|
operator wchar_t() const { return (wchar_t)m_value; }
|
|
#endif
|
|
operator int() const { return (int)m_value; }
|
|
operator unsigned int() const { return (unsigned int)m_value; }
|
|
operator long int() const { return (long int)m_value; }
|
|
operator unsigned long int() const { return (unsigned long)m_value; }
|
|
operator short int() const { return (short int)m_value; }
|
|
operator unsigned short int() const { return (unsigned short int)m_value; }
|
|
|
|
// We need this operator for the "*p" part of expressions like "for (
|
|
// const_iterator p = begin() + nStart; *p; ++p )". In this case,
|
|
// compilation would fail without it because the conversion to bool would
|
|
// be ambiguous (there are all these int types conversions...). (And adding
|
|
// operator unspecified_bool_type() would only makes the ambiguity worse.)
|
|
operator bool() const { return m_value != 0; }
|
|
bool operator!() const { return !((bool)*this); }
|
|
|
|
// And this one is needed by some (not all, but not using ifdefs makes the
|
|
// code easier) compilers to parse "str[0] && *p" successfully
|
|
bool operator&&(bool v) const { return (bool)*this && v; }
|
|
|
|
// Assignment operators:
|
|
wxUniChar& operator=(const wxUniChar& c) { if (&c != this) m_value = c.m_value; return *this; }
|
|
wxUniChar& operator=(const wxUniCharRef& c);
|
|
wxUniChar& operator=(char c) { m_value = From8bit(c); return *this; }
|
|
wxUniChar& operator=(unsigned char c) { m_value = From8bit((char)c); return *this; }
|
|
#if wxWCHAR_T_IS_REAL_TYPE
|
|
wxUniChar& operator=(wchar_t c) { m_value = c; return *this; }
|
|
#endif
|
|
wxUniChar& operator=(int c) { m_value = c; return *this; }
|
|
wxUniChar& operator=(unsigned int c) { m_value = c; return *this; }
|
|
wxUniChar& operator=(long int c) { m_value = c; return *this; }
|
|
wxUniChar& operator=(unsigned long int c) { m_value = c; return *this; }
|
|
wxUniChar& operator=(short int c) { m_value = c; return *this; }
|
|
wxUniChar& operator=(unsigned short int c) { m_value = c; return *this; }
|
|
|
|
// Comparison operators:
|
|
|
|
// define the given comparison operator for all the types
|
|
#define wxDEFINE_UNICHAR_OPERATOR(op) \
|
|
bool operator op(const wxUniChar& c) const { return m_value op c.m_value; }\
|
|
bool operator op(char c) const { return m_value op From8bit(c); } \
|
|
bool operator op(unsigned char c) const { return m_value op From8bit((char)c); } \
|
|
wxIF_WCHAR_T_TYPE( bool operator op(wchar_t c) const { return m_value op (value_type)c; } ) \
|
|
bool operator op(int c) const { return m_value op (value_type)c; } \
|
|
bool operator op(unsigned int c) const { return m_value op (value_type)c; } \
|
|
bool operator op(short int c) const { return m_value op (value_type)c; } \
|
|
bool operator op(unsigned short int c) const { return m_value op (value_type)c; } \
|
|
bool operator op(long int c) const { return m_value op (value_type)c; } \
|
|
bool operator op(unsigned long int c) const { return m_value op (value_type)c; }
|
|
|
|
wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHAR_OPERATOR)
|
|
|
|
#undef wxDEFINE_UNICHAR_OPERATOR
|
|
|
|
// this is needed for expressions like 'Z'-c
|
|
int operator-(const wxUniChar& c) const { return m_value - c.m_value; }
|
|
int operator-(char c) const { return m_value - From8bit(c); }
|
|
int operator-(unsigned char c) const { return m_value - From8bit((char)c); }
|
|
int operator-(wchar_t c) const { return m_value - (value_type)c; }
|
|
|
|
|
|
private:
|
|
// notice that we implement these functions inline for 7-bit ASCII
|
|
// characters purely for performance reasons
|
|
static value_type From8bit(char c)
|
|
{
|
|
#if wxUSE_UNICODE
|
|
if ( (unsigned char)c < 0x80 )
|
|
return c;
|
|
|
|
return FromHi8bit(c);
|
|
#else
|
|
return c;
|
|
#endif
|
|
}
|
|
|
|
static char To8bit(value_type c)
|
|
{
|
|
#if wxUSE_UNICODE
|
|
if ( c < 0x80 )
|
|
return wx_truncate_cast(char, c);
|
|
|
|
return ToHi8bit(c);
|
|
#else
|
|
return c;
|
|
#endif
|
|
}
|
|
|
|
// helpers of the functions above called to deal with non-ASCII chars
|
|
static value_type FromHi8bit(char c);
|
|
static char ToHi8bit(value_type v);
|
|
static bool GetAsHi8bit(value_type v, char *c);
|
|
|
|
private:
|
|
value_type m_value;
|
|
};
|
|
|
|
|
|
// Writeable reference to a character in wxString.
|
|
//
|
|
// This class can be used in the same way wxChar is used, except that changing
|
|
// its value updates the underlying string object.
|
|
class WXDLLIMPEXP_BASE wxUniCharRef
|
|
{
|
|
private:
|
|
typedef wxStringImpl::iterator iterator;
|
|
|
|
// create the reference
|
|
#if wxUSE_UNICODE_UTF8
|
|
wxUniCharRef(wxString& str, iterator pos) : m_str(str), m_pos(pos) {}
|
|
#else
|
|
wxUniCharRef(iterator pos) : m_pos(pos) {}
|
|
#endif
|
|
|
|
public:
|
|
// NB: we have to make this public, because we don't have wxString
|
|
// declaration available here and so can't declare wxString::iterator
|
|
// as friend; so at least don't use a ctor but a static function
|
|
// that must be used explicitly (this is more than using 'explicit'
|
|
// keyword on ctor!):
|
|
#if wxUSE_UNICODE_UTF8
|
|
static wxUniCharRef CreateForString(wxString& str, iterator pos)
|
|
{ return wxUniCharRef(str, pos); }
|
|
#else
|
|
static wxUniCharRef CreateForString(iterator pos)
|
|
{ return wxUniCharRef(pos); }
|
|
#endif
|
|
|
|
wxUniChar::value_type GetValue() const { return UniChar().GetValue(); }
|
|
|
|
#if wxUSE_UNICODE_UTF8
|
|
wxUniChar::Utf8CharBuffer AsUTF8() const { return UniChar().AsUTF8(); }
|
|
#endif // wxUSE_UNICODE_UTF8
|
|
|
|
bool IsAscii() const { return UniChar().IsAscii(); }
|
|
bool GetAsChar(char *c) const { return UniChar().GetAsChar(c); }
|
|
|
|
// Assignment operators:
|
|
#if wxUSE_UNICODE_UTF8
|
|
wxUniCharRef& operator=(const wxUniChar& c);
|
|
#else
|
|
wxUniCharRef& operator=(const wxUniChar& c) { *m_pos = c; return *this; }
|
|
#endif
|
|
|
|
wxUniCharRef& operator=(const wxUniCharRef& c)
|
|
{ if (&c != this) *this = c.UniChar(); return *this; }
|
|
|
|
wxUniCharRef& operator=(char c) { return *this = wxUniChar(c); }
|
|
wxUniCharRef& operator=(unsigned char c) { return *this = wxUniChar(c); }
|
|
#if wxWCHAR_T_IS_REAL_TYPE
|
|
wxUniCharRef& operator=(wchar_t c) { return *this = wxUniChar(c); }
|
|
#endif
|
|
wxUniCharRef& operator=(int c) { return *this = wxUniChar(c); }
|
|
wxUniCharRef& operator=(unsigned int c) { return *this = wxUniChar(c); }
|
|
wxUniCharRef& operator=(short int c) { return *this = wxUniChar(c); }
|
|
wxUniCharRef& operator=(unsigned short int c) { return *this = wxUniChar(c); }
|
|
wxUniCharRef& operator=(long int c) { return *this = wxUniChar(c); }
|
|
wxUniCharRef& operator=(unsigned long int c) { return *this = wxUniChar(c); }
|
|
|
|
// Conversions to the same types as wxUniChar is convertible too:
|
|
operator char() const { return UniChar(); }
|
|
operator unsigned char() const { return UniChar(); }
|
|
#if wxWCHAR_T_IS_REAL_TYPE
|
|
operator wchar_t() const { return UniChar(); }
|
|
#endif
|
|
operator int() const { return UniChar(); }
|
|
operator unsigned int() const { return UniChar(); }
|
|
operator short int() const { return UniChar(); }
|
|
operator unsigned short int() const { return UniChar(); }
|
|
operator long int() const { return UniChar(); }
|
|
operator unsigned long int() const { return UniChar(); }
|
|
|
|
// see wxUniChar::operator bool etc. for explanation
|
|
operator bool() const { return (bool)UniChar(); }
|
|
bool operator!() const { return !UniChar(); }
|
|
bool operator&&(bool v) const { return UniChar() && v; }
|
|
|
|
// Comparison operators:
|
|
#define wxDEFINE_UNICHARREF_OPERATOR(op) \
|
|
bool operator op(const wxUniCharRef& c) const { return UniChar() op c.UniChar(); }\
|
|
bool operator op(const wxUniChar& c) const { return UniChar() op c; } \
|
|
bool operator op(char c) const { return UniChar() op c; } \
|
|
bool operator op(unsigned char c) const { return UniChar() op c; } \
|
|
wxIF_WCHAR_T_TYPE( bool operator op(wchar_t c) const { return UniChar() op c; } ) \
|
|
bool operator op(int c) const { return UniChar() op c; } \
|
|
bool operator op(unsigned int c) const { return UniChar() op c; } \
|
|
bool operator op(short int c) const { return UniChar() op c; } \
|
|
bool operator op(unsigned short int c) const { return UniChar() op c; } \
|
|
bool operator op(long int c) const { return UniChar() op c; } \
|
|
bool operator op(unsigned long int c) const { return UniChar() op c; }
|
|
|
|
wxFOR_ALL_COMPARISONS(wxDEFINE_UNICHARREF_OPERATOR)
|
|
|
|
#undef wxDEFINE_UNICHARREF_OPERATOR
|
|
|
|
// for expressions like c-'A':
|
|
int operator-(const wxUniCharRef& c) const { return UniChar() - c.UniChar(); }
|
|
int operator-(const wxUniChar& c) const { return UniChar() - c; }
|
|
int operator-(char c) const { return UniChar() - c; }
|
|
int operator-(unsigned char c) const { return UniChar() - c; }
|
|
int operator-(wchar_t c) const { return UniChar() - c; }
|
|
|
|
private:
|
|
#if wxUSE_UNICODE_UTF8
|
|
wxUniChar UniChar() const;
|
|
#else
|
|
wxUniChar UniChar() const { return *m_pos; }
|
|
#endif
|
|
|
|
friend class WXDLLIMPEXP_FWD_BASE wxUniChar;
|
|
|
|
private:
|
|
// reference to the string and pointer to the character in string
|
|
#if wxUSE_UNICODE_UTF8
|
|
wxString& m_str;
|
|
#endif
|
|
iterator m_pos;
|
|
};
|
|
|
|
inline wxUniChar::wxUniChar(const wxUniCharRef& c)
|
|
{
|
|
m_value = c.UniChar().m_value;
|
|
}
|
|
|
|
inline wxUniChar& wxUniChar::operator=(const wxUniCharRef& c)
|
|
{
|
|
m_value = c.UniChar().m_value;
|
|
return *this;
|
|
}
|
|
|
|
// Comparison operators for the case when wxUniChar(Ref) is the second operand
|
|
// implemented in terms of member comparison functions
|
|
|
|
wxDEFINE_COMPARISONS_BY_REV(char, const wxUniChar&)
|
|
wxDEFINE_COMPARISONS_BY_REV(char, const wxUniCharRef&)
|
|
|
|
wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniChar&)
|
|
wxDEFINE_COMPARISONS_BY_REV(wchar_t, const wxUniCharRef&)
|
|
|
|
wxDEFINE_COMPARISONS_BY_REV(const wxUniChar&, const wxUniCharRef&)
|
|
|
|
// for expressions like c-'A':
|
|
inline int operator-(char c1, const wxUniCharRef& c2) { return -(c2 - c1); }
|
|
inline int operator-(const wxUniChar& c1, const wxUniCharRef& c2) { return -(c2 - c1); }
|
|
inline int operator-(wchar_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }
|
|
|
|
#endif /* _WX_UNICHAR_H_ */
|