include/wx/intl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        intl.h
   3 // Purpose:     Internationalization and localisation for wxWindows
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef   __INTLH__
  13 #define   __INTLH__
  14
  15 #ifdef __GNUG__
  16     #pragma interface "intl.h"
  17 #endif
  18
  19 #include "wx/defs.h"
  20 #include "wx/string.h"
  21
  22 #if wxUSE_INTL
  23
  24 // ============================================================================
  25 // global decls
  26 // ============================================================================
  27
  28 // ----------------------------------------------------------------------------
  29 // macros
  30 // ----------------------------------------------------------------------------
  31
  32 // gettext() style macro (notice that xgettext should be invoked with "-k_"
  33 // option to extract the strings inside _() from the sources)
  34 #ifndef WXINTL_NO_GETTEXT_MACRO
  35     #define   _(str)  wxGetTranslation(_T(str))
  36 #endif
  37
  38 // another one which just marks the strings for extraction, but doesn't
  39 // perform the translation (use -kwxTRANSLATE with xgettext!)
  40 #define wxTRANSLATE(str) _T(str)
  41
  42 // ----------------------------------------------------------------------------
  43 // forward decls
  44 // ----------------------------------------------------------------------------
  45 class WXDLLEXPORT wxLocale;
  46 class WXDLLEXPORT wxMsgCatalog;
  47
  48 // ============================================================================
  49 // locale support
  50 // ============================================================================
  51
  52 // ----------------------------------------------------------------------------
  53 // wxLocale: encapsulates all language dependent settings, including current
  54 //           message catalogs, date, time and currency formats (TODO) &c
  55 // ----------------------------------------------------------------------------
  56 class WXDLLEXPORT wxLocale
  57 {
  58 public:
  59     // ctor & dtor
  60     // -----------
  61
  62         // call Init() if you use this ctor
  63     wxLocale();
  64         // the ctor has a side effect of changing current locale
  65     wxLocale(const wxChar *szName,              // name (for messages)
  66              const wxChar *szShort = (const wxChar *) NULL,      // dir prefix (for msg files)
  67              const wxChar *szLocale = (const wxChar *) NULL,     // locale (for setlocale)
  68              bool bLoadDefault = TRUE)        // preload wxstd.mo?
  69         { Init(szName, szShort, szLocale, bLoadDefault); }
  70         // the same as a function (returns TRUE on success)
  71     bool Init(const wxChar *szName,
  72               const wxChar *szShort = (const wxChar *) NULL,
  73               const wxChar *szLocale = (const wxChar *) NULL,
  74               bool bLoadDefault = TRUE);
  75         // restores old locale
  76     ~wxLocale();
  77
  78     // returns locale name
  79     const wxChar *GetLocale() const { return m_strLocale; }
  80
  81     // add a prefix to the catalog lookup path: the message catalog files will be
  82     // looked up under prefix/<lang>/LC_MESSAGES, prefix/LC_MESSAGES and prefix
  83     // (in this order).
  84     //
  85     // This only applies to subsequent invocations of AddCatalog()!
  86     static void AddCatalogLookupPathPrefix(const wxString& prefix);
  87
  88     // add a catalog: it's searched for in standard places (current directory
  89     // first, system one after), but the you may prepend additional directories to
  90     // the search path with AddCatalogLookupPathPrefix().
  91     //
  92     // The loaded catalog will be used for message lookup by GetString().
  93     //
  94     // Returns 'true' if it was successfully loaded
  95     bool AddCatalog(const wxChar *szDomain);
  96
  97     // check if the given catalog is loaded
  98     bool IsLoaded(const wxChar *szDomain) const;
  99
 100     // retrieve the translation for a string in all loaded domains unless
 101     // the szDomain parameter is specified (and then only this domain is
 102     // searched)
 103     //
 104     // return original string if translation is not available
 105     // (in this case an error message is generated the first time
 106     //  a string is not found; use wxLogNull to suppress it)
 107     //
 108     // domains are searched in the last to first order, i.e. catalogs
 109     // added later override those added before.
 110     const wxMB2WXbuf GetString(const wxChar *szOrigString,
 111                                const wxChar *szDomain = (const wxChar *) NULL) const;
 112
 113     // Returns the current short name for the locale
 114     const wxString& GetName() const { return m_strShort; }
 115
 116 private:
 117     // find catalog by name in a linked list, return NULL if !found
 118     wxMsgCatalog  *FindCatalog(const wxChar *szDomain) const;
 119
 120     wxString       m_strLocale,     // this locale name
 121                    m_strShort;      // short name for the locale
 122
 123     const wxChar  *m_pszOldLocale;  // previous locale from setlocale()
 124     wxLocale      *m_pOldLocale;    // previous wxLocale
 125
 126     wxMsgCatalog  *m_pMsgCat;       // pointer to linked list of catalogs
 127 };
 128
 129 // ----------------------------------------------------------------------------
 130 // global functions
 131 // ----------------------------------------------------------------------------
 132
 133 // get the current locale object (note that it may be NULL!)
 134 extern WXDLLEXPORT wxLocale* wxGetLocale();
 135
 136 // get the translation of the string in the current locale
 137 inline const wxMB2WXbuf wxGetTranslation(const wxChar *sz)
 138 {
 139     wxLocale *pLoc = wxGetLocale();
 140     if (pLoc)
 141         return pLoc->GetString(sz);
 142     else
 143         return (const wxMB2WXbuf)sz;
 144 }
 145
 146 #else // !wxUSE_INTL
 147
 148 // the macros should still be defined - otherwise compilation would fail
 149
 150 #if !defined(WXINTL_NO_GETTEXT_MACRO) && !defined(_)
 151     #define   _(str)  (str)
 152 #endif
 153
 154 #define wxTRANSLATE(str) _T(str)
 155
 156 inline const wxChar *wxGetTranslation(const wxChar *sz) { return sz; }
 157
 158 #endif // wxUSE_INTL/!wxUSE_INTL
 159
 160 // define this one just in case it occurs somewhere (instead of preferred
 161 // wxTRANSLATE) too
 162 #if !defined(WXINTL_NO_GETTEXT_MACRO) && !defined(gettext_noop)
 163     #define gettext_noop(str) _T(str)
 164 #endif
 165
 166 #endif
 167     // _WX_INTLH__