src/unix/fontenum.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/fontenum.cpp
   3 // Purpose:     wxFontEnumerator class for X11/GDK
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     01.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   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 #include "wx/defs.h"
  25 #include "wx/dynarray.h"
  26 #include "wx/string.h"
  27 #include "wx/regex.h"
  28 #include "wx/utils.h"
  29
  30 #include "wx/fontmap.h"
  31 #include "wx/fontenum.h"
  32 #include "wx/fontutil.h"
  33
  34 #ifdef __VMS__ // Xlib.h for VMS is not (yet) compatible with C++
  35                // The resulting warnings are switched off here
  36 #pragma message disable nosimpint
  37 #endif
  38 #include <X11/Xlib.h>
  39 #ifdef __VMS__
  40 #pragma message enable nosimpint
  41 #endif
  42
  43 // ----------------------------------------------------------------------------
  44 // private functions
  45 // ----------------------------------------------------------------------------
  46
  47 // create the list of all fonts with the given spacing and encoding
  48 static char **CreateFontList(wxChar spacing, wxFontEncoding encoding,
  49                              int *nFonts);
  50
  51 // extract all font families from the given font list and call our
  52 // OnFacename() for each of them
  53 static bool ProcessFamiliesFromFontList(wxFontEnumerator *This,
  54                                         char **fonts,
  55                                         int nFonts);
  56
  57
  58 // ----------------------------------------------------------------------------
  59 // private types
  60 // ----------------------------------------------------------------------------
  61
  62 // ============================================================================
  63 // implementation
  64 // ============================================================================
  65
  66 // ----------------------------------------------------------------------------
  67 // helpers
  68 // ----------------------------------------------------------------------------
  69
  70 static char **CreateFontList(wxChar spacing,
  71                              wxFontEncoding encoding,
  72                              int *nFonts)
  73 {
  74     wxNativeEncodingInfo info;
  75     wxGetNativeFontEncoding(encoding, &info);
  76
  77 #if wxUSE_FONTMAP
  78     if ( !wxTestFontEncoding(info) )
  79     {
  80         // ask font mapper for a replacement
  81         (void)wxTheFontMapper->GetAltForEncoding(encoding, &info);
  82     }
  83 #endif // wxUSE_FONTMAP
  84
  85     wxString pattern;
  86     pattern.Printf(wxT("-*-*-*-*-*-*-*-*-*-*-%c-*-%s-%s"),
  87                    spacing,
  88                    info.xregistry.c_str(),
  89                    info.xencoding.c_str());
  90
  91     // get the list of all fonts
  92     return XListFonts((Display *)wxGetDisplay(), pattern.mb_str(), 32767, nFonts);
  93 }
  94
  95 static bool ProcessFamiliesFromFontList(wxFontEnumerator *This,
  96                                         char **fonts,
  97                                         int nFonts)
  98 {
  99 #if wxUSE_REGEX
 100     wxRegEx re(wxT("^(-[^-]*){14}$"), wxRE_NOSUB);
 101 #endif // wxUSE_REGEX
 102
 103     // extract the list of (unique) font families
 104     wxSortedArrayString families;
 105     for ( int n = 0; n < nFonts; n++ )
 106     {
 107         char *font = fonts[n];
 108 #if wxUSE_REGEX
 109         if ( !re.Matches(font) )
 110 #else // !wxUSE_REGEX
 111         if ( !wxString(font).Matches(wxT("-*-*-*-*-*-*-*-*-*-*-*-*-*-*")) )
 112 #endif // wxUSE_REGEX/!wxUSE_REGEX
 113         {
 114             // it's not a full font name (probably an alias)
 115             continue;
 116         }
 117
 118         char *dash = strchr(font + 1, '-');
 119         char *family = dash + 1;
 120         dash = strchr(family, '-');
 121         *dash = '\0'; // !NULL because Matches() above succeeded
 122         wxString fam(family);
 123
 124         if ( families.Index(fam) == wxNOT_FOUND )
 125         {
 126             if ( !This->OnFacename(fam) )
 127             {
 128                 // stop enumerating
 129                 return FALSE;
 130             }
 131
 132             families.Add(fam);
 133         }
 134         //else: already seen
 135     }
 136
 137     return TRUE;
 138 }
 139
 140 // ----------------------------------------------------------------------------
 141 // wxFontEnumerator
 142 // ----------------------------------------------------------------------------
 143
 144 bool wxFontEnumerator::EnumerateFacenames(wxFontEncoding encoding,
 145                                           bool fixedWidthOnly)
 146 {
 147     int nFonts;
 148     char **fonts;
 149
 150     if ( fixedWidthOnly )
 151     {
 152         bool cont = TRUE;
 153         fonts = CreateFontList(wxT('m'), encoding, &nFonts);
 154         if ( fonts )
 155         {
 156             cont = ProcessFamiliesFromFontList(this, fonts, nFonts);
 157
 158             XFreeFontNames(fonts);
 159         }
 160
 161         if ( !cont )
 162         {
 163             return TRUE;
 164         }
 165
 166         fonts = CreateFontList(wxT('c'), encoding, &nFonts);
 167         if ( !fonts )
 168         {
 169             return TRUE;
 170         }
 171     }
 172     else
 173     {
 174         fonts = CreateFontList(wxT('*'), encoding, &nFonts);
 175
 176         if ( !fonts )
 177         {
 178             // it's ok if there are no fonts in given encoding - but it's not
 179             // ok if there are no fonts at all
 180             wxASSERT_MSG(encoding != wxFONTENCODING_SYSTEM,
 181                          wxT("No fonts at all on this system?"));
 182
 183             return FALSE;
 184         }
 185     }
 186
 187     (void)ProcessFamiliesFromFontList(this, fonts, nFonts);
 188
 189     XFreeFontNames(fonts);
 190
 191     return TRUE;
 192 }
 193
 194 bool wxFontEnumerator::EnumerateEncodings(const wxString& family)
 195 {
 196     wxString pattern;
 197     pattern.Printf(wxT("-*-%s-*-*-*-*-*-*-*-*-*-*-*-*"),
 198                    family.IsEmpty() ? wxT("*") : family.c_str());
 199
 200     // get the list of all fonts
 201     int nFonts;
 202     char **fonts = XListFonts((Display *)wxGetDisplay(), pattern.mb_str(),
 203                               32767, &nFonts);
 204
 205     if ( !fonts )
 206     {
 207         // unknown family?
 208         return FALSE;
 209     }
 210
 211     // extract the list of (unique) encodings
 212     wxSortedArrayString encodings;
 213     for ( int n = 0; n < nFonts; n++ )
 214     {
 215         char *font = fonts[n];
 216         if ( !wxString(font).Matches(wxT("-*-*-*-*-*-*-*-*-*-*-*-*-*-*")) )
 217         {
 218             // it's not a full font name (probably an alias)
 219             continue;
 220         }
 221
 222         // extract the family
 223         char *dash = strchr(font + 1, '-');
 224         char *familyFont = dash + 1;
 225         dash = strchr(familyFont, '-');
 226         *dash = '\0'; // !NULL because Matches() above succeeded
 227
 228         if ( !family.IsEmpty() && (family != familyFont) )
 229         {
 230             // family doesn't match
 231             continue;
 232         }
 233
 234         // now extract the registry/encoding
 235         char *p = dash + 1; // just after the dash after family
 236         dash = strrchr(p, '-');
 237
 238         wxString registry(dash + 1);
 239         *dash = '\0';
 240
 241         dash = strrchr(p, '-');
 242         wxString encoding(dash + 1);
 243
 244         encoding << wxT('-') << registry;
 245         if ( encodings.Index(encoding) == wxNOT_FOUND )
 246         {
 247             if ( !OnFontEncoding(familyFont, encoding) )
 248             {
 249                 break;
 250             }
 251
 252             encodings.Add(encoding);
 253         }
 254         //else: already had this one
 255     }
 256
 257     XFreeFontNames(fonts);
 258
 259     return TRUE;
 260 }