src/common/fontenumcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/fontenumcmn.cpp
   3 // Purpose:     wxFontEnumerator class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     7/5/2006
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999-2003 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_FONTENUM
  28
  29 #include "wx/fontenum.h"
  30
  31 // ============================================================================
  32 // implementation
  33 // ============================================================================
  34
  35 // A simple wxFontEnumerator which doesn't perform any filtering and
  36 // just returns all facenames and encodings found in the system
  37 class WXDLLEXPORT wxSimpleFontEnumerator : public wxFontEnumerator
  38 {
  39 public:
  40     wxSimpleFontEnumerator() { }
  41
  42     // called by EnumerateFacenames
  43     virtual bool OnFacename(const wxString& facename)
  44     {
  45         m_arrFacenames.Add(facename);
  46         return true;
  47     }
  48
  49     // called by EnumerateEncodings
  50     virtual bool OnFontEncoding(const wxString& WXUNUSED(facename),
  51                                 const wxString& encoding)
  52     {
  53         m_arrEncodings.Add(encoding);
  54         return true;
  55     }
  56
  57 public:
  58     wxArrayString m_arrFacenames, m_arrEncodings;
  59 };
  60
  61
  62 /* static */
  63 wxArrayString wxFontEnumerator::GetFacenames(wxFontEncoding encoding, bool fixedWidthOnly)
  64 {
  65     wxSimpleFontEnumerator temp;
  66     temp.EnumerateFacenames(encoding, fixedWidthOnly);
  67     return temp.m_arrFacenames;
  68 }
  69
  70 /* static */
  71 wxArrayString wxFontEnumerator::GetEncodings(const wxString& facename)
  72 {
  73     wxSimpleFontEnumerator temp;
  74     temp.EnumerateEncodings(facename);
  75     return temp.m_arrEncodings;
  76 }
  77
  78 /* static */
  79 bool wxFontEnumerator::IsValidFacename(const wxString &facename)
  80 {
  81     // we cache the result of wxFontEnumerator::GetFacenames supposing that
  82     // the array of face names won't change in the session of this program
  83     static wxArrayString s_arr = wxFontEnumerator::GetFacenames();
  84
  85 #ifdef __WXMSW__
  86     // Quoting the MSDN:
  87     //     "MS Shell Dlg is a mapping mechanism that enables
  88     //     U.S. English Microsoft Windows NT, and Microsoft Windows 2000 to
  89     //     support locales that have characters that are not contained in code
  90     //     page 1252. It is not a font but a face name for a nonexistent font."
  91     // Thus we need to consider "Ms Shell Dlg" and "Ms Shell Dlg 2" as valid
  92     // font face names even if they are enumerated by wxFontEnumerator
  93     if (facename.IsSameAs(wxT("Ms Shell Dlg"), false) ||
  94         facename.IsSameAs(wxT("Ms Shell Dlg 2"), false))
  95         return true;
  96 #endif
  97
  98     // is given font face name a valid one ?
  99     if (s_arr.Index(facename, false) == wxNOT_FOUND)
 100         return false;
 101
 102     return true;
 103 }
 104
 105 #ifdef wxHAS_UTF8_FONTS
 106 bool wxFontEnumerator::EnumerateEncodingsUTF8(const wxString& facename)
 107 {
 108     // name of UTF-8 encoding: no need to use wxFontMapper for it as it's
 109     // unlikely to change
 110     const wxString utf8(_T("UTF-8"));
 111
 112     // all fonts are in UTF-8 only if this code is used
 113     if ( !facename.empty() )
 114     {
 115         OnFontEncoding(facename, utf8);
 116         return true;
 117     }
 118
 119     // so enumerating all facenames supporting this encoding is the same as
 120     // enumerating all facenames
 121     const wxArrayString facenames(GetFacenames(wxFONTENCODING_UTF8));
 122     const size_t count = facenames.size();
 123     if ( !count )
 124         return false;
 125
 126     for ( size_t n = 0; n < count; n++ )
 127     {
 128         OnFontEncoding(facenames[n], utf8);
 129     }
 130
 131     return true;
 132 }
 133 #endif // wxHAS_UTF8_FONTS
 134
 135 #endif // wxUSE_FONTENUM