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