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 // ============================================================================
  23 // global decls
  24 // ============================================================================
  25
  26 // ----------------------------------------------------------------------------
  27 // macros
  28 // ----------------------------------------------------------------------------
  29
  30 // gettext() style macro (notice that xgettext should be invoked with "-k_"
  31 // option to extract the strings inside _() from the sources)
  32 #ifndef WXINTL_NO_GETTEXT_MACRO
  33     #define   _(str)  wxGetTranslation(_T(str))
  34 #endif
  35
  36 // ----------------------------------------------------------------------------
  37 // forward decls
  38 // ----------------------------------------------------------------------------
  39 class WXDLLEXPORT wxLocale;
  40 class WXDLLEXPORT wxMsgCatalog;
  41
  42 // ============================================================================
  43 // locale support
  44 // ============================================================================
  45
  46 // ----------------------------------------------------------------------------
  47 // wxLocale: encapsulates all language dependent settings, including current
  48 //           message catalogs, date, time and currency formats (TODO) &c
  49 // ----------------------------------------------------------------------------
  50 class WXDLLEXPORT wxLocale
  51 {
  52 public:
  53     // ctor & dtor
  54     // -----------
  55
  56         // call Init() if you use this ctor
  57     wxLocale();
  58         // the ctor has a side effect of changing current locale
  59     wxLocale(const wxChar *szName,              // name (for messages)
  60              const wxChar *szShort = (const wxChar *) NULL,      // dir prefix (for msg files)
  61              const wxChar *szLocale = (const wxChar *) NULL,     // locale (for setlocale)
  62              bool bLoadDefault = TRUE)        // preload wxstd.mo?
  63         { Init(szName, szShort, szLocale, bLoadDefault); }
  64         // the same as a function (returns TRUE on success)
  65     bool Init(const wxChar *szName,
  66               const wxChar *szShort = (const wxChar *) NULL,
  67               const wxChar *szLocale = (const wxChar *) NULL,
  68               bool bLoadDefault = TRUE);
  69         // restores old locale
  70     ~wxLocale();
  71
  72     // returns locale name
  73     const wxChar *GetLocale() const { return m_strLocale; }
  74
  75     // add a prefix to the catalog lookup path: the message catalog files will be
  76     // looked up under prefix/<lang>/LC_MESSAGES, prefix/LC_MESSAGES and prefix
  77     // (in this order).
  78     //
  79     // This only applies to subsequent invocations of AddCatalog()!
  80     static void AddCatalogLookupPathPrefix(const wxString& prefix);
  81
  82     // add a catalog: it's searched for in standard places (current directory
  83     // first, system one after), but the you may prepend additional directories to
  84     // the search path with AddCatalogLookupPathPrefix().
  85     //
  86     // The loaded catalog will be used for message lookup by GetString().
  87     //
  88     // Returns 'true' if it was successfully loaded
  89     bool AddCatalog(const wxChar *szDomain);
  90
  91     // check if the given catalog is loaded
  92     bool IsLoaded(const wxChar *szDomain) const;
  93
  94     // retrieve the translation for a string in all loaded domains unless
  95     // the szDomain parameter is specified (and then only this domain is
  96     // searched)
  97     //
  98     // return original string if translation is not available
  99     // (in this case an error message is generated the first time
 100     //  a string is not found; use wxLogNull to suppress it)
 101     //
 102     // domains are searched in the last to first order, i.e. catalogs
 103     // added later override those added before.
 104     const wxMB2WXbuf GetString(const wxChar *szOrigString,
 105                                const wxChar *szDomain = (const wxChar *) NULL) const;
 106
 107     // Returns the current short name for the locale
 108     const wxString& GetName() const { return m_strShort; }
 109
 110 private:
 111     // find catalog by name in a linked list, return NULL if !found
 112     wxMsgCatalog  *FindCatalog(const wxChar *szDomain) const;
 113
 114     wxString       m_strLocale,     // this locale name
 115                    m_strShort;      // short name for the locale
 116
 117     const wxChar  *m_pszOldLocale;  // previous locale from setlocale()
 118     wxLocale      *m_pOldLocale;    // previous wxLocale
 119
 120     wxMsgCatalog  *m_pMsgCat;       // pointer to linked list of catalogs
 121 };
 122
 123 // ----------------------------------------------------------------------------
 124 // global functions
 125 // ----------------------------------------------------------------------------
 126
 127 // get the current locale object (note that it may be NULL!)
 128 extern WXDLLEXPORT wxLocale* wxGetLocale();
 129
 130 // get the translation of the string in the current locale
 131 inline const wxMB2WXbuf wxGetTranslation(const wxChar *sz)
 132 {
 133     wxLocale *pLoc = wxGetLocale();
 134     if (pLoc)
 135         return pLoc->GetString(sz);
 136     else
 137         return (const wxMB2WXbuf)sz;
 138 }
 139
 140 #endif
 141     // _WX_INTLH__