dbecee02ed
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44941 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
356 lines
14 KiB
C++
356 lines
14 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/unichar.h
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// Purpose: wxUniChar and wxUniCharRef classes
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// Author: Vaclav Slavik
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// Created: 2007-03-19
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// RCS-ID: $Id$
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// Copyright: (c) 2007 REA Elektronik GmbH
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_UNICHAR_H_
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#define _WX_UNICHAR_H_
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#include "wx/defs.h"
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#include "wx/chartype.h"
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class WXDLLIMPEXP_BASE wxUniCharRef;
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// This class represents single Unicode character. It can be converted to
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// and from char or wchar_t and implements commonly used character operations.
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class WXDLLIMPEXP_BASE wxUniChar
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{
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public:
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// NB: this is not wchar_t on purpose, it needs to represent the entire
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// Unicode code points range and wchar_t may be too small for that
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// (e.g. on Win32 where wchar_t* is encoded in UTF-16)
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typedef wxUint32 value_type;
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wxUniChar() : m_value(0) {}
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// Create the character from 8bit character value encoded in the current
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// locale's charset.
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wxUniChar(char c) { m_value = From8bit(c); }
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// Create the character from a wchar_t character value.
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wxUniChar(wchar_t c) { m_value = c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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// Create the character from a wint_t character value.
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wxUniChar(wint_t c) { m_value = c; }
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#endif
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wxUniChar(int c) { m_value = c; }
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wxUniChar(const wxUniCharRef& c);
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// Returns Unicode code point value of the character
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value_type GetValue() const { return m_value; }
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// Casts to char and wchar_t types:
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operator char() const { return To8bit(m_value); }
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operator wchar_t() const { return m_value; }
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#ifndef wxWINT_T_IS_TYPEDEF
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operator wint_t() const { return m_value; }
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#endif
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operator int() const { return m_value; }
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// We need this operator for the "*p" part of expressions like "for (
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// const_iterator p = begin() + nStart; *p; ++p )". In this case,
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// compilation would fail without it because the conversion to bool would
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// be ambiguous (there are all these int types conversions...). (And adding
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// operator unspecified_bool_type() would only makes the ambiguity worse.)
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operator bool() const { return m_value != 0; }
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bool operator!() const { return !((bool)*this); }
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#if (defined(__VISUALC__) && __VISUALC__ < 1400) || \
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defined(__DIGITALMARS__) || defined(__BORLANDC__)
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// We need this for VC++ < 8 or DigitalMars and expressions like
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// "str[0] && *p":
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bool operator&&(bool v) const { return (bool)*this && v; }
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#endif
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// Assignment operators:
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wxUniChar& operator=(const wxUniChar& c) { m_value = c.m_value; return *this; }
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wxUniChar& operator=(char c) { m_value = From8bit(c); return *this; }
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wxUniChar& operator=(wchar_t c) { m_value = c; return *this; }
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#ifndef wxWINT_T_IS_TYPEDEF
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wxUniChar& operator=(wint_t c) { m_value = c; return *this; }
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#endif
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// Comparision operators:
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bool operator==(const wxUniChar& c) const { return m_value == c.m_value; }
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bool operator==(char c) const { return m_value == From8bit(c); }
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bool operator==(wchar_t c) const { return m_value == (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator==(wint_t c) const { return m_value == (value_type)c; }
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#endif
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bool operator!=(const wxUniChar& c) const { return m_value != c.m_value; }
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bool operator!=(char c) const { return m_value != From8bit(c); }
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bool operator!=(wchar_t c) const { return m_value != (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator!=(wint_t c) const { return m_value != (value_type)c; }
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#endif
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bool operator>(const wxUniChar& c) const { return m_value > c.m_value; }
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bool operator>(char c) const { return m_value > (value_type)c; }
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bool operator>(wchar_t c) const { return m_value > (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator>(wint_t c) const { return m_value > (value_type)c; }
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#endif
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bool operator<(const wxUniChar& c) const { return m_value < c.m_value; }
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bool operator<(char c) const { return m_value < From8bit(c); }
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bool operator<(wchar_t c) const { return m_value < (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator<(wint_t c) const { return m_value < (value_type)c; }
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#endif
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bool operator>=(const wxUniChar& c) const { return m_value >= c.m_value; }
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bool operator>=(char c) const { return m_value >= From8bit(c); }
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bool operator>=(wchar_t c) const { return m_value >= (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator>=(wint_t c) const { return m_value >= (value_type)c; }
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#endif
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bool operator<=(const wxUniChar& c) const { return m_value <= c.m_value; }
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bool operator<=(char c) const { return m_value <= From8bit(c); }
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bool operator<=(wchar_t c) const { return m_value <= (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator<=(wint_t c) const { return m_value <= (value_type)c; }
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#endif
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int operator-(const wxUniChar& c) const { return m_value - c.m_value; }
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int operator-(char c) const { return m_value - From8bit(c); }
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int operator-(wchar_t c) const { return m_value - (value_type)c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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int operator-(wint_t c) const { return m_value - (value_type)c; }
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#endif
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private:
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static value_type From8bit(char c);
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static char To8bit(value_type c);
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private:
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value_type m_value;
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};
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// Writeable reference to a character in wxString.
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//
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// This class can be used in the same way wxChar is used, except that changing
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// its value updates the underlying string object.
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class WXDLLIMPEXP_BASE wxUniCharRef
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{
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private:
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// create the reference
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// FIXME-UTF8: the interface will need changes for UTF-8 build
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wxUniCharRef(wxChar *pos) : m_pos(pos) {}
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public:
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// NB: we have to make this public, because we don't have wxString
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// declaration available here and so can't declare wxString::iterator
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// as friend; so at least don't use a ctor but a static function
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// that must be used explicitly (this is more than using 'explicit'
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// keyword on ctor!):
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//
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// FIXME-UTF8: the interface will need changes for UTF-8 build
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static wxUniCharRef CreateForString(wxChar *pos)
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{ return wxUniCharRef(pos); }
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wxUniChar::value_type GetValue() const { return UniChar().GetValue(); }
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// Assignment operators:
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wxUniCharRef& operator=(const wxUniCharRef& c)
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{
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*m_pos = *c.m_pos;
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return *this;
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};
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wxUniCharRef& operator=(const wxUniChar& c)
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{
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*m_pos = c;
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return *this;
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};
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wxUniCharRef& operator=(char c) { return *this = wxUniChar(c); }
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wxUniCharRef& operator=(wchar_t c) { return *this = wxUniChar(c); }
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// Casts to wxUniChar type:
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operator char() const { return UniChar(); }
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operator wchar_t() const { return UniChar(); }
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#ifndef wxWINT_T_IS_TYPEDEF
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operator wint_t() const { return UniChar(); }
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#endif
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operator int() const { return UniChar(); }
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// see wxUniChar::operator bool etc. for explanation
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operator bool() const { return (bool)UniChar(); }
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bool operator!() const { return !UniChar(); }
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#if (defined(__VISUALC__) && __VISUALC__ < 1400) || \
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defined(__DIGITALMARS__) || defined(__BORLANDC__)
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bool operator&&(bool v) const { return UniChar() && v; }
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#endif
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// Comparision operators:
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bool operator==(const wxUniCharRef& c) const { return m_pos == c.m_pos; }
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bool operator==(const wxUniChar& c) const { return UniChar() == c; }
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bool operator==(char c) const { return UniChar() == c; }
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bool operator==(wchar_t c) const { return UniChar() == c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator==(wint_t c) const { return UniChar() == c; }
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#endif
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bool operator!=(const wxUniCharRef& c) const { return m_pos != c.m_pos; }
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bool operator!=(const wxUniChar& c) const { return UniChar() != c; }
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bool operator!=(char c) const { return UniChar() != c; }
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bool operator!=(wchar_t c) const { return UniChar() != c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator!=(wint_t c) const { return UniChar() != c; }
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#endif
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bool operator>(const wxUniCharRef& c) const { return UniChar() > c.UniChar(); }
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bool operator>(const wxUniChar& c) const { return UniChar() > c; }
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bool operator>(char c) const { return UniChar() > c; }
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bool operator>(wchar_t c) const { return UniChar() > c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator>(wint_t c) const { return UniChar() > c; }
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#endif
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bool operator<(const wxUniCharRef& c) const { return UniChar() < c.UniChar(); }
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bool operator<(const wxUniChar& c) const { return UniChar() < c; }
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bool operator<(char c) const { return UniChar() < c; }
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bool operator<(wchar_t c) const { return UniChar() < c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator<(wint_t c) const { return UniChar() < c; }
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#endif
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bool operator>=(const wxUniCharRef& c) const { return UniChar() >= c.UniChar(); }
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bool operator>=(const wxUniChar& c) const { return UniChar() >= c; }
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bool operator>=(char c) const { return UniChar() >= c; }
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bool operator>=(wchar_t c) const { return UniChar() >= c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator>=(wint_t c) const { return UniChar() >= c; }
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#endif
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bool operator<=(const wxUniCharRef& c) const { return UniChar() <= c.UniChar(); }
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bool operator<=(const wxUniChar& c) const { return UniChar() <= c; }
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bool operator<=(char c) const { return UniChar() <= c; }
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bool operator<=(wchar_t c) const { return UniChar() <= c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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bool operator<=(wint_t c) const { return UniChar() <= c; }
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#endif
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// for expressions like c-'A':
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int operator-(const wxUniCharRef& c) const { return UniChar() - c.UniChar(); }
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int operator-(const wxUniChar& c) const { return UniChar() - c; }
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int operator-(char c) const { return UniChar() - c; }
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int operator-(wchar_t c) const { return UniChar() - c; }
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#ifndef wxWINT_T_IS_TYPEDEF
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int operator-(wint_t c) const { return UniChar() - c; }
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#endif
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private:
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wxUniChar UniChar() const { return *m_pos; }
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friend class WXDLLIMPEXP_BASE wxUniChar;
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private:
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// pointer to the character in string
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wxChar *m_pos;
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};
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inline wxUniChar::wxUniChar(const wxUniCharRef& c)
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{
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m_value = c.UniChar().m_value;
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}
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// Comparision operators for the case when wxUniChar(Ref) is the second operand:
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inline bool operator==(char c1, const wxUniChar& c2) { return c2 == c1; }
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inline bool operator==(wchar_t c1, const wxUniChar& c2) { return c2 == c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator==(wint_t c1, const wxUniChar& c2) { return c2 == c1; }
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#endif
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inline bool operator!=(char c1, const wxUniChar& c2) { return c2 != c1; }
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inline bool operator!=(wchar_t c1, const wxUniChar& c2) { return c2 != c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator!=(wint_t c1, const wxUniChar& c2) { return c2 != c1; }
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#endif
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inline bool operator>(char c1, const wxUniChar& c2) { return c2 < c1; }
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inline bool operator>(wchar_t c1, const wxUniChar& c2) { return c2 < c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator>(wint_t c1, const wxUniChar& c2) { return c2 < c1; }
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#endif
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inline bool operator<(char c1, const wxUniChar& c2) { return c2 > c1; }
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inline bool operator<(wchar_t c1, const wxUniChar& c2) { return c2 > c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator<(wint_t c1, const wxUniChar& c2) { return c2 > c1; }
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#endif
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inline bool operator>=(char c1, const wxUniChar& c2) { return c2 <= c1; }
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inline bool operator>=(wchar_t c1, const wxUniChar& c2) { return c2 <= c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator>=(wint_t c1, const wxUniChar& c2) { return c2 <= c1; }
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#endif
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inline bool operator<=(char c1, const wxUniChar& c2) { return c2 >= c1; }
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inline bool operator<=(wchar_t c1, const wxUniChar& c2) { return c2 >= c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator<=(wint_t c1, const wxUniChar& c2) { return c2 >= c1; }
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#endif
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inline bool operator==(char c1, const wxUniCharRef& c2) { return c2 == c1; }
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inline bool operator==(wchar_t c1, const wxUniCharRef& c2) { return c2 == c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator==(wint_t c1, const wxUniCharRef& c2) { return c2 == c1; }
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#endif
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inline bool operator==(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 == c1; }
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inline bool operator!=(char c1, const wxUniCharRef& c2) { return c2 != c1; }
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inline bool operator!=(wchar_t c1, const wxUniCharRef& c2) { return c2 != c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator!=(wint_t c1, const wxUniCharRef& c2) { return c2 != c1; }
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#endif
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inline bool operator!=(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 != c1; }
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inline bool operator>(char c1, const wxUniCharRef& c2) { return c2 < c1; }
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inline bool operator>(wchar_t c1, const wxUniCharRef& c2) { return c2 < c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator>(wint_t c1, const wxUniCharRef& c2) { return c2 < c1; }
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#endif
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inline bool operator>(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 < c1; }
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inline bool operator<(char c1, const wxUniCharRef& c2) { return c2 > c1; }
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inline bool operator<(wchar_t c1, const wxUniCharRef& c2) { return c2 > c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator<(wint_t c1, const wxUniCharRef& c2) { return c2 > c1; }
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#endif
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inline bool operator<(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 > c1; }
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inline bool operator>=(char c1, const wxUniCharRef& c2) { return c2 <= c1; }
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inline bool operator>=(wchar_t c1, const wxUniCharRef& c2) { return c2 <= c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator>=(wint_t c1, const wxUniCharRef& c2) { return c2 <= c1; }
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#endif
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inline bool operator>=(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 <= c1; }
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inline bool operator<=(char c1, const wxUniCharRef& c2) { return c2 >= c1; }
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inline bool operator<=(wchar_t c1, const wxUniCharRef& c2) { return c2 >= c1; }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline bool operator<=(wint_t c1, const wxUniCharRef& c2) { return c2 >= c1; }
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#endif
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inline bool operator<=(const wxUniChar& c1, const wxUniCharRef& c2) { return c2 >= c1; }
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// for expressions like c-'A':
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inline int operator-(char c1, const wxUniCharRef& c2) { return -(c2 - c1); }
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inline int operator-(wchar_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }
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#ifndef wxWINT_T_IS_TYPEDEF
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inline int operator-(wint_t c1, const wxUniCharRef& c2) { return -(c2 - c1); }
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#endif
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inline int operator-(const wxUniChar& c1, const wxUniCharRef& c2) { return -(c2 - c1); }
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#endif /* _WX_UNICHAR_H_ */
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