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 // ----------------------------------------------------------------------------
  39 // forward decls
  40 // ----------------------------------------------------------------------------
  41 class WXDLLEXPORT wxLocale;
  42 class WXDLLEXPORT wxMsgCatalog;
  43
  44 // ============================================================================
  45 // locale support
  46 // ============================================================================
  47
  48 // ----------------------------------------------------------------------------
  49 // wxLocale: encapsulates all language dependent settings, including current
  50 //           message catalogs, date, time and currency formats (TODO) &c
  51 // ----------------------------------------------------------------------------
  52 class WXDLLEXPORT wxLocale
  53 {
  54 public:
  55     // ctor & dtor
  56     // -----------
  57
  58         // call Init() if you use this ctor
  59     wxLocale();
  60         // the ctor has a side effect of changing current locale
  61     wxLocale(const wxChar *szName,              // name (for messages)
  62              const wxChar *szShort = (const wxChar *) NULL,      // dir prefix (for msg files)
  63              const wxChar *szLocale = (const wxChar *) NULL,     // locale (for setlocale)
  64              bool bLoadDefault = TRUE)        // preload wxstd.mo?
  65         { Init(szName, szShort, szLocale, bLoadDefault); }
  66         // the same as a function (returns TRUE on success)
  67     bool Init(const wxChar *szName,
  68               const wxChar *szShort = (const wxChar *) NULL,
  69               const wxChar *szLocale = (const wxChar *) NULL,
  70               bool bLoadDefault = TRUE);
  71         // restores old locale
  72     ~wxLocale();
  73
  74     // returns locale name
  75     const wxChar *GetLocale() const { return m_strLocale; }
  76
  77     // add a prefix to the catalog lookup path: the message catalog files will be
  78     // looked up under prefix/<lang>/LC_MESSAGES, prefix/LC_MESSAGES and prefix
  79     // (in this order).
  80     //
  81     // This only applies to subsequent invocations of AddCatalog()!
  82     static void AddCatalogLookupPathPrefix(const wxString& prefix);
  83
  84     // add a catalog: it's searched for in standard places (current directory
  85     // first, system one after), but the you may prepend additional directories to
  86     // the search path with AddCatalogLookupPathPrefix().
  87     //
  88     // The loaded catalog will be used for message lookup by GetString().
  89     //
  90     // Returns 'true' if it was successfully loaded
  91     bool AddCatalog(const wxChar *szDomain);
  92
  93     // check if the given catalog is loaded
  94     bool IsLoaded(const wxChar *szDomain) const;
  95
  96     // retrieve the translation for a string in all loaded domains unless
  97     // the szDomain parameter is specified (and then only this domain is
  98     // searched)
  99     //
 100     // return original string if translation is not available
 101     // (in this case an error message is generated the first time
 102     //  a string is not found; use wxLogNull to suppress it)
 103     //
 104     // domains are searched in the last to first order, i.e. catalogs
 105     // added later override those added before.
 106     const wxMB2WXbuf GetString(const wxChar *szOrigString,
 107                                const wxChar *szDomain = (const wxChar *) NULL) const;
 108
 109     // Returns the current short name for the locale
 110     const wxString& GetName() const { return m_strShort; }
 111
 112 private:
 113     // find catalog by name in a linked list, return NULL if !found
 114     wxMsgCatalog  *FindCatalog(const wxChar *szDomain) const;
 115
 116     wxString       m_strLocale,     // this locale name
 117                    m_strShort;      // short name for the locale
 118
 119     const wxChar  *m_pszOldLocale;  // previous locale from setlocale()
 120     wxLocale      *m_pOldLocale;    // previous wxLocale
 121
 122     wxMsgCatalog  *m_pMsgCat;       // pointer to linked list of catalogs
 123 };
 124
 125 // ----------------------------------------------------------------------------
 126 // global functions
 127 // ----------------------------------------------------------------------------
 128
 129 // get the current locale object (note that it may be NULL!)
 130 extern WXDLLEXPORT wxLocale* wxGetLocale();
 131
 132 // get the translation of the string in the current locale
 133 inline const wxMB2WXbuf wxGetTranslation(const wxChar *sz)
 134 {
 135     wxLocale *pLoc = wxGetLocale();
 136     if (pLoc)
 137         return pLoc->GetString(sz);
 138     else
 139         return (const wxMB2WXbuf)sz;
 140 }
 141
 142 #else // !wxUSE_INTL
 143
 144 #ifndef WXINTL_NO_GETTEXT_MACRO
 145     #define   _(str)  (str)
 146 #endif
 147
 148 inline const wxChar *wxGetTranslation(const wxChar *sz) { return sz; }
 149
 150 #endif // wxUSE_INTL/!wxUSE_INTL
 151
 152 #endif
 153     // _WX_INTLH__