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     #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     #ifdef STRICT
 133                (LPARAM)
 134     #else
 135                (LPSTR)
 136     #endif
 137                this);
 138 #endif // Win32/16
 139
 140     ::ReleaseDC(NULL, hDC);
 141 }
 142
 143 bool wxFontEnumeratorHelper::OnFont(const LPLOGFONT lf,
 144                                     const LPTEXTMETRIC tm) const
 145 {
 146     if ( m_fixedOnly )
 147     {
 148         // check that it's a fixed pitch font (there is *no* error here, the
 149         // flag name is misleading!)
 150         if ( tm->tmPitchAndFamily & TMPF_FIXED_PITCH )
 151         {
 152             // not a fixed pitch font
 153             return TRUE;
 154         }
 155     }
 156
 157     if ( m_charset != -1 )
 158     {
 159         // check that we have the right encoding
 160         if ( lf->lfCharSet != m_charset )
 161         {
 162             return TRUE;
 163         }
 164     }
 165
 166     return m_fontEnum->OnFacename(lf->lfFaceName);
 167 }
 168
 169 // ----------------------------------------------------------------------------
 170 // wxFontEnumerator
 171 // ----------------------------------------------------------------------------
 172
 173 bool wxFontEnumerator::EnumerateFacenames(wxFontEncoding encoding,
 174                                           bool fixedWidthOnly)
 175 {
 176     wxFontEnumeratorHelper fe(this);
 177     if ( fe.SetEncoding(encoding) )
 178     {
 179         fe.SetFixedOnly(fixedWidthOnly);
 180
 181         fe.DoEnumerate();
 182     }
 183     // else: no such fonts, unknown encoding
 184
 185     return TRUE;
 186 }
 187
 188 bool wxFontEnumerator::EnumerateEncodings(const wxString& family)
 189 {
 190     wxFAIL_MSG(wxT("TODO"));
 191
 192     return TRUE;
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // Windows callbacks
 197 // ----------------------------------------------------------------------------
 198
 199 int CALLBACK wxFontEnumeratorProc(LPLOGFONT lplf, LPTEXTMETRIC lptm,
 200                                   DWORD dwStyle, LONG lParam)
 201 {
 202     // Get rid of any fonts that we don't want...
 203     if ( dwStyle != TRUETYPE_FONTTYPE )
 204     {
 205         // continue enumeration
 206         return TRUE;
 207     }
 208
 209     wxFontEnumeratorHelper *fontEnum = (wxFontEnumeratorHelper *)lParam;
 210
 211     return fontEnum->OnFont(lplf, lptm);
 212 }
 213