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__)
 114     //BJ : FIXME? I have the second implementation in 2.95. Does it work with other versions?
 115    // #define wxFONTENUMPROC int(*)(ENUMLOGFONTEX *, NEWTEXTMETRICEX*, int, LPARAM)
 116     #define wxFONTENUMPROC int(*)(const LOGFONTA *, const TEXTMETRICA *, long unsigned int, LPARAM)
 117 #else
 118     #define wxFONTENUMPROC FONTENUMPROC
 119 #endif
 120
 121 void wxFontEnumeratorHelper::DoEnumerate()
 122 {
 123     HDC hDC = ::GetDC(NULL);
 124
 125 #ifdef __WIN32__
 126     LOGFONT lf;
 127     lf.lfCharSet = m_charset;
 128     wxStrncpy(lf.lfFaceName, m_facename, WXSIZEOF(lf.lfFaceName));
 129     lf.lfPitchAndFamily = 0;
 130     ::EnumFontFamiliesEx(hDC, &lf, (wxFONTENUMPROC)wxFontEnumeratorProc,
 131                          (LPARAM)this, 0 /* reserved */) ;
 132 #else // Win16
 133     ::EnumFonts(hDC, (LPTSTR)NULL, (FONTENUMPROC)wxFontEnumeratorProc,
 134     #ifdef STRICT
 135                (LPARAM)
 136     #else
 137                (LPSTR)
 138     #endif
 139                this);
 140 #endif // Win32/16
 141
 142     ::ReleaseDC(NULL, hDC);
 143 }
 144
 145 bool wxFontEnumeratorHelper::OnFont(const LPLOGFONT lf,
 146                                     const LPTEXTMETRIC tm) const
 147 {
 148     if ( m_fixedOnly )
 149     {
 150         // check that it's a fixed pitch font (there is *no* error here, the
 151         // flag name is misleading!)
 152         if ( tm->tmPitchAndFamily & TMPF_FIXED_PITCH )
 153         {
 154             // not a fixed pitch font
 155             return TRUE;
 156         }
 157     }
 158
 159     if ( m_charset != -1 )
 160     {
 161         // check that we have the right encoding
 162         if ( lf->lfCharSet != m_charset )
 163         {
 164             return TRUE;
 165         }
 166     }
 167
 168     return m_fontEnum->OnFacename(lf->lfFaceName);
 169 }
 170
 171 // ----------------------------------------------------------------------------
 172 // wxFontEnumerator
 173 // ----------------------------------------------------------------------------
 174
 175 bool wxFontEnumerator::EnumerateFacenames(wxFontEncoding encoding,
 176                                           bool fixedWidthOnly)
 177 {
 178     wxFontEnumeratorHelper fe(this);
 179     if ( fe.SetEncoding(encoding) )
 180     {
 181         fe.SetFixedOnly(fixedWidthOnly);
 182
 183         fe.DoEnumerate();
 184     }
 185     // else: no such fonts, unknown encoding
 186
 187     return TRUE;
 188 }
 189
 190 bool wxFontEnumerator::EnumerateEncodings(const wxString& family)
 191 {
 192     wxFAIL_MSG(wxT("TODO"));
 193
 194     return TRUE;
 195 }
 196
 197 // ----------------------------------------------------------------------------
 198 // Windows callbacks
 199 // ----------------------------------------------------------------------------
 200
 201 int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,
 202                                   DWORD dwStyle, LONG lParam)
 203 {
 204     // Get rid of any fonts that we don't want...
 205     if ( dwStyle != TRUETYPE_FONTTYPE )
 206     {
 207         // continue enumeration
 208         return TRUE;
 209     }
 210
 211     wxFontEnumeratorHelper *fontEnum = (wxFontEnumeratorHelper *)lParam;
 212
 213     return fontEnum->OnFont(lplf, lptm);
 214 }
 215