src/msw/fontenum.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/fontenum.cpp
   3 // Purpose:     wxFontEnumerator class for Windows
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin to add support for font encodings
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "fontenum.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28   #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32   #include "wx/font.h"
  33 #endif
  34
  35 #include "wx/fontenum.h"
  36 #include "wx/fontmap.h"
  37
  38 #include "wx/msw/private.h"
  39
  40 // ----------------------------------------------------------------------------
  41 // private classes
  42 // ----------------------------------------------------------------------------
  43
  44 class wxFontEnumeratorHelper
  45 {
  46 public:
  47     wxFontEnumeratorHelper(wxFontEnumerator *fontEnum);
  48
  49     // control what exactly are we enumerating
  50     bool SetEncoding(wxFontEncoding encoding);
  51     void SetFixedOnly(bool fixedOnly)
  52         { m_fixedOnly = fixedOnly; }
  53
  54     // call to start enumeration
  55     void DoEnumerate();
  56
  57     // called by our font enumeration proc
  58     bool OnFont(const LPLOGFONT lf, const LPTEXTMETRIC tm) const;
  59
  60 private:
  61     // the object we forward calls to OnFont() to
  62     wxFontEnumerator *m_fontEnum;
  63
  64     // if != -1, enum only fonts which have this encoding
  65     int m_charset;
  66
  67     // if not empty, enum only the fonts with this facename
  68     wxString m_facename;
  69
  70     // if TRUE, enum only fixed fonts
  71     bool m_fixedOnly;
  72 };
  73
  74 // ----------------------------------------------------------------------------
  75 // private functions
  76 // ----------------------------------------------------------------------------
  77
  78 int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,
  79                                   DWORD dwStyle, LONG lParam);
  80
  81 // ============================================================================
  82 // implementation
  83 // ============================================================================
  84
  85 // ----------------------------------------------------------------------------
  86 // wxFontEnumeratorHelper
  87 // ----------------------------------------------------------------------------
  88
  89 wxFontEnumeratorHelper::wxFontEnumeratorHelper(wxFontEnumerator *fontEnum)
  90 {
  91     m_fontEnum = fontEnum;
  92     m_charset = -1;
  93     m_fixedOnly = FALSE;
  94 }
  95
  96 bool wxFontEnumeratorHelper::SetEncoding(wxFontEncoding encoding)
  97 {
  98     wxNativeEncodingInfo info;
  99     if ( !wxGetNativeFontEncoding(encoding, &info) )
 100     {
 101         if ( !wxTheFontMapper->GetAltForEncoding(encoding, &info) )
 102         {
 103             // no such encodings at all
 104             return FALSE;
 105         }
 106     }
 107     m_charset = info.charset;
 108     m_facename = info.facename;
 109
 110     return TRUE;
 111 }
 112
 113 #if defined(__GNUWIN32__) && !defined(__MINGW32__)
 114 #define wxFONTENUMPROC int(*)(ENUMLOGFONTEX *, NEWTEXTMETRICEX*, int, LPARAM)
 115 #else
 116 #define wxFONTENUMPROC FONTENUMPROC
 117 #endif
 118
 119 void wxFontEnumeratorHelper::DoEnumerate()
 120 {
 121     HDC hDC = ::GetDC(NULL);
 122
 123 #ifdef __WIN32__
 124     LOGFONT lf;
 125     lf.lfCharSet = m_charset;
 126     wxStrncpy(lf.lfFaceName, m_facename, WXSIZEOF(lf.lfFaceName));
 127     lf.lfPitchAndFamily = 0;
 128     ::EnumFontFamiliesEx(hDC, &lf, (wxFONTENUMPROC)wxFontEnumeratorProc,
 129                          (LPARAM)this, 0 /* reserved */) ;
 130 #else // Win16
 131     ::EnumFonts(hDC, (LPTSTR)NULL, (FONTENUMPROC)wxFontEnumeratorProc,
 132                 (LPARAM) (void*) this) ;
 133 #endif // Win32/16
 134
 135     ::ReleaseDC(NULL, hDC);
 136 }
 137
 138 bool wxFontEnumeratorHelper::OnFont(const LPLOGFONT lf,
 139                                     const LPTEXTMETRIC tm) const
 140 {
 141     if ( m_fixedOnly )
 142     {
 143         // check that it's a fixed pitch font (there is *no* error here, the
 144         // flag name is misleading!)
 145         if ( tm->tmPitchAndFamily & TMPF_FIXED_PITCH )
 146         {
 147             // not a fixed pitch font
 148             return TRUE;
 149         }
 150     }
 151
 152     if ( m_charset != -1 )
 153     {
 154         // check that we have the right encoding
 155         if ( lf->lfCharSet != m_charset )
 156         {
 157             return TRUE;
 158         }
 159     }
 160
 161     return m_fontEnum->OnFacename(lf->lfFaceName);
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // wxFontEnumerator
 166 // ----------------------------------------------------------------------------
 167
 168 bool wxFontEnumerator::EnumerateFacenames(wxFontEncoding encoding,
 169                                           bool fixedWidthOnly)
 170 {
 171     wxFontEnumeratorHelper fe(this);
 172     if ( fe.SetEncoding(encoding) )
 173     {
 174         fe.SetFixedOnly(fixedWidthOnly);
 175
 176         fe.DoEnumerate();
 177     }
 178     // else: no such fonts, unknown encoding
 179
 180     return TRUE;
 181 }
 182
 183 bool wxFontEnumerator::EnumerateEncodings(const wxString& family)
 184 {
 185     wxFAIL_MSG(wxT("TODO"));
 186
 187     return TRUE;
 188 }
 189
 190 // ----------------------------------------------------------------------------
 191 // Windows callbacks
 192 // ----------------------------------------------------------------------------
 193
 194 int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,
 195                                   DWORD dwStyle, LONG lParam)
 196 {
 197     // Get rid of any fonts that we don't want...
 198     if ( dwStyle != TRUETYPE_FONTTYPE )
 199     {
 200         // continue enumeration
 201         return TRUE;
 202     }
 203
 204     wxFontEnumeratorHelper *fontEnum = (wxFontEnumeratorHelper *)lParam;
 205
 206     return fontEnum->OnFont(lplf, lptm);
 207 }
 208