src/unix/fontutil.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        unix/fontutil.cpp
   3 // Purpose:     Font helper functions for X11 (GDK/X)
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05.11.99
   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 "fontutil.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 #endif // PCH
  33
  34 #include "wx/fontutil.h"
  35 #include "wx/fontmap.h"
  36 #include "wx/tokenzr.h"
  37 #include "wx/hash.h"
  38 #include "wx/module.h"
  39
  40 #if wxUSE_PANGO
  41
  42 #include "pango/pango.h"
  43
  44 #ifdef __WXGTK20__
  45 #include "wx/gtk/private.h"
  46 #else
  47 #include "wx/x11/private.h"
  48 #endif
  49
  50 // ----------------------------------------------------------------------------
  51 // wxNativeFontInfo
  52 // ----------------------------------------------------------------------------
  53
  54 void wxNativeFontInfo::Init()
  55 {
  56     description = NULL;
  57 }
  58
  59 int wxNativeFontInfo::GetPointSize() const
  60 {
  61     return pango_font_description_get_size( description ) / PANGO_SCALE;
  62 }
  63
  64 wxFontStyle wxNativeFontInfo::GetStyle() const
  65 {
  66     wxFontStyle m_style = wxFONTSTYLE_NORMAL;
  67
  68     switch (pango_font_description_get_style( description ))
  69     {
  70         case PANGO_STYLE_NORMAL:
  71             m_style = wxFONTSTYLE_NORMAL;
  72             break;
  73         case PANGO_STYLE_ITALIC:
  74             m_style = wxFONTSTYLE_ITALIC;
  75             break;
  76         case PANGO_STYLE_OBLIQUE:
  77             m_style = wxFONTSTYLE_SLANT;
  78             break;
  79     }
  80
  81     return m_style;
  82 }
  83
  84 wxFontWeight wxNativeFontInfo::GetWeight() const
  85 {
  86     wxFontWeight m_weight = wxFONTWEIGHT_NORMAL;
  87
  88     switch (pango_font_description_get_weight( description ))
  89     {
  90         case PANGO_WEIGHT_ULTRALIGHT:
  91             m_weight = wxFONTWEIGHT_LIGHT;
  92             break;
  93         case PANGO_WEIGHT_LIGHT:
  94             m_weight = wxFONTWEIGHT_LIGHT;
  95             break;
  96         case PANGO_WEIGHT_NORMAL:
  97             m_weight = wxFONTWEIGHT_NORMAL;
  98             break;
  99         case PANGO_WEIGHT_BOLD:
 100             m_weight = wxFONTWEIGHT_BOLD;
 101             break;
 102         case PANGO_WEIGHT_ULTRABOLD:
 103             m_weight = wxFONTWEIGHT_BOLD;
 104             break;
 105         case PANGO_WEIGHT_HEAVY:
 106             m_weight = wxFONTWEIGHT_BOLD;
 107             break;
 108     }
 109
 110     return m_weight;
 111 }
 112
 113 bool wxNativeFontInfo::GetUnderlined() const
 114 {
 115     return FALSE;
 116 }
 117
 118 wxString wxNativeFontInfo::GetFaceName() const
 119 {
 120     wxString tmp = wxGTK_CONV_BACK( pango_font_description_get_family( description ) );
 121
 122     return tmp;
 123 }
 124
 125 wxFontFamily wxNativeFontInfo::GetFamily() const
 126 {
 127     return wxFONTFAMILY_SWISS;
 128 }
 129
 130 wxFontEncoding wxNativeFontInfo::GetEncoding() const
 131 {
 132     return wxFONTENCODING_SYSTEM;
 133 }
 134
 135 bool wxNativeFontInfo::FromString(const wxString& s)
 136 {
 137     if (description)
 138         pango_font_description_free( description );
 139
 140     description = pango_font_description_from_string( wxGTK_CONV( s ) );
 141
 142     return TRUE;
 143 }
 144
 145 wxString wxNativeFontInfo::ToString() const
 146 {
 147     char *str = pango_font_description_to_string( description );
 148     wxString tmp = wxGTK_CONV_BACK(  str );
 149     g_free( str );
 150
 151     return tmp;
 152 }
 153
 154 bool wxNativeFontInfo::FromUserString(const wxString& s)
 155 {
 156     return FromString( s );
 157 }
 158
 159 wxString wxNativeFontInfo::ToUserString() const
 160 {
 161     return ToString();
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // wxNativeEncodingInfo
 166 // ----------------------------------------------------------------------------
 167
 168 bool wxNativeEncodingInfo::FromString(const wxString& s)
 169 {
 170     return FALSE;
 171 }
 172
 173 wxString wxNativeEncodingInfo::ToString() const
 174 {
 175     return wxEmptyString;
 176 }
 177
 178 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
 179 {
 180     return TRUE;
 181 }
 182
 183 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
 184                              wxNativeEncodingInfo *info)
 185 {
 186     return FALSE;
 187 }
 188
 189 #else // GTK+ 1.x
 190
 191 #ifdef __X__
 192     #ifdef __VMS__
 193         #pragma message disable nosimpint
 194     #endif
 195
 196     #include <X11/Xlib.h>
 197
 198     #ifdef __VMS__
 199         #pragma message enable nosimpint
 200     #endif
 201
 202     #include "wx/utils.h"       // for wxGetDisplay()
 203 #elif defined(__WXGTK__)
 204     // we have to declare struct tm to avoid problems with first forward
 205     // declaring it in C code (glib.h included from gdk.h does it) and then
 206     // defining it when time.h is included from the headers below - this is
 207     // known not to work at least with Sun CC 6.01
 208     #include <time.h>
 209
 210     #include <gdk/gdk.h>
 211 #endif
 212
 213
 214 // ----------------------------------------------------------------------------
 215 // private data
 216 // ----------------------------------------------------------------------------
 217
 218 static wxHashTable *g_fontHash = (wxHashTable*) NULL;
 219
 220 // ----------------------------------------------------------------------------
 221 // private functions
 222 // ----------------------------------------------------------------------------
 223
 224 // define the functions to create and destroy native fonts for this toolkit
 225 #ifdef __X__
 226     wxNativeFont wxLoadFont(const wxString& fontSpec)
 227     {
 228         return XLoadQueryFont((Display *)wxGetDisplay(), fontSpec);
 229     }
 230
 231     inline void wxFreeFont(wxNativeFont font)
 232     {
 233         XFreeFont((Display *)wxGetDisplay(), (XFontStruct *)font);
 234     }
 235 #elif defined(__WXGTK__)
 236     wxNativeFont wxLoadFont(const wxString& fontSpec)
 237     {
 238         // use gdk_fontset_load() instead of gdk_font_load() because otherwise
 239         // we have problems with Japanese (not terribly precise, I know, but
 240         // this is all the patch said)
 241         return gdk_fontset_load( wxConvertWX2MB(fontSpec) );
 242     }
 243
 244     inline void wxFreeFont(wxNativeFont font)
 245     {
 246         gdk_font_unref(font);
 247     }
 248 #else
 249     #error "Unknown GUI toolkit"
 250 #endif
 251
 252 static bool wxTestFontSpec(const wxString& fontspec);
 253
 254 static wxNativeFont wxLoadQueryFont(int pointSize,
 255                                     int family,
 256                                     int style,
 257                                     int weight,
 258                                     bool underlined,
 259                                     const wxString& facename,
 260                                     const wxString& xregistry,
 261                                     const wxString& xencoding,
 262                                     wxString* xFontName);
 263
 264 // ============================================================================
 265 // implementation
 266 // ============================================================================
 267
 268 // ----------------------------------------------------------------------------
 269 // wxNativeEncodingInfo
 270 // ----------------------------------------------------------------------------
 271
 272 // convert to/from the string representation: format is
 273 //      encodingid;registry;encoding[;facename]
 274 bool wxNativeEncodingInfo::FromString(const wxString& s)
 275 {
 276     // use ";", not "-" because it may be part of encoding name
 277     wxStringTokenizer tokenizer(s, _T(";"));
 278
 279     wxString encid = tokenizer.GetNextToken();
 280     long enc;
 281     if ( !encid.ToLong(&enc) )
 282         return FALSE;
 283     encoding = (wxFontEncoding)enc;
 284
 285     xregistry = tokenizer.GetNextToken();
 286     if ( !xregistry )
 287         return FALSE;
 288
 289     xencoding = tokenizer.GetNextToken();
 290     if ( !xencoding )
 291         return FALSE;
 292
 293     // ok even if empty
 294     facename = tokenizer.GetNextToken();
 295
 296     return TRUE;
 297 }
 298
 299 wxString wxNativeEncodingInfo::ToString() const
 300 {
 301     wxString s;
 302     s << (long)encoding << _T(';') << xregistry << _T(';') << xencoding;
 303     if ( !!facename )
 304     {
 305         s << _T(';') << facename;
 306     }
 307
 308     return s;
 309 }
 310
 311 // ----------------------------------------------------------------------------
 312 // wxNativeFontInfo
 313 // ----------------------------------------------------------------------------
 314
 315 void wxNativeFontInfo::Init()
 316 {
 317     m_isDefault = TRUE;
 318 }
 319
 320 bool wxNativeFontInfo::FromString(const wxString& s)
 321 {
 322     wxStringTokenizer tokenizer(s, _T(";"));
 323
 324     // check the version
 325     wxString token = tokenizer.GetNextToken();
 326     if ( token != _T('0') )
 327         return FALSE;
 328
 329     xFontName = tokenizer.GetNextToken();
 330
 331     // this should be the end
 332     if ( tokenizer.HasMoreTokens() )
 333         return FALSE;
 334
 335     return FromXFontName(xFontName);
 336 }
 337
 338 wxString wxNativeFontInfo::ToString() const
 339 {
 340     // 0 is the version
 341     return wxString::Format(_T("%d;%s"), 0, GetXFontName().c_str());
 342 }
 343
 344 bool wxNativeFontInfo::FromUserString(const wxString& s)
 345 {
 346     return FromXFontName(s);
 347 }
 348
 349 wxString wxNativeFontInfo::ToUserString() const
 350 {
 351     return GetXFontName();
 352 }
 353
 354 bool wxNativeFontInfo::HasElements() const
 355 {
 356     // we suppose that the foundry is never empty, so if it is it means that we
 357     // had never parsed the XLFD
 358     return !fontElements[0].empty();
 359 }
 360
 361 wxString wxNativeFontInfo::GetXFontComponent(wxXLFDField field) const
 362 {
 363     wxCHECK_MSG( field < wxXLFD_MAX, _T(""), _T("invalid XLFD field") );
 364
 365     if ( !HasElements() )
 366     {
 367         // const_cast
 368         if ( !((wxNativeFontInfo *)this)->FromXFontName(xFontName) )
 369             return _T("");
 370     }
 371
 372     return fontElements[field];
 373 }
 374
 375 bool wxNativeFontInfo::FromXFontName(const wxString& fontname)
 376 {
 377     // TODO: we should be able to handle the font aliases here, but how?
 378     wxStringTokenizer tokenizer(fontname, _T("-"));
 379
 380     // skip the leading, usually empty field (font name registry)
 381     if ( !tokenizer.HasMoreTokens() )
 382         return FALSE;
 383
 384     (void)tokenizer.GetNextToken();
 385
 386     for ( size_t n = 0; n < WXSIZEOF(fontElements); n++ )
 387     {
 388         if ( !tokenizer.HasMoreTokens() )
 389         {
 390             // not enough elements in the XLFD - or maybe an alias
 391             return FALSE;
 392         }
 393
 394         fontElements[n] = tokenizer.GetNextToken();
 395     }
 396
 397     // this should be all
 398     if ( tokenizer.HasMoreTokens() )
 399         return FALSE;
 400
 401     // we're initialized now
 402     m_isDefault = FALSE;
 403
 404     return TRUE;
 405 }
 406
 407 wxString wxNativeFontInfo::GetXFontName() const
 408 {
 409     if ( xFontName.empty() )
 410     {
 411         for ( size_t n = 0; n < WXSIZEOF(fontElements); n++ )
 412         {
 413             // replace the non specified elements with '*' except for the
 414             // additional style which is usually just omitted
 415             wxString elt = fontElements[n];
 416             if ( elt.empty() && n != wxXLFD_ADDSTYLE )
 417             {
 418                 elt = _T('*');
 419             }
 420
 421             // const_cast
 422             ((wxNativeFontInfo *)this)->xFontName << _T('-') << elt;
 423         }
 424     }
 425
 426     return xFontName;
 427 }
 428
 429 void
 430 wxNativeFontInfo::SetXFontComponent(wxXLFDField field, const wxString& value)
 431 {
 432     wxCHECK_RET( field < wxXLFD_MAX, _T("invalid XLFD field") );
 433
 434     // this class should be initialized with a valid font spec first and only
 435     // then the fields may be modified!
 436     wxASSERT_MSG( !IsDefault(), _T("can't modify an uninitialized XLFD") );
 437
 438     if ( !HasElements() )
 439     {
 440         // const_cast
 441         if ( !((wxNativeFontInfo *)this)->FromXFontName(xFontName) )
 442         {
 443             wxFAIL_MSG( _T("can't set font element for invalid XLFD") );
 444
 445             return;
 446         }
 447     }
 448
 449     fontElements[field] = value;
 450
 451     // invalidate the XFLD, it doesn't correspond to the font elements any more
 452     xFontName.clear();
 453 }
 454
 455 void wxNativeFontInfo::SetXFontName(const wxString& xFontName_)
 456 {
 457     // invalidate the font elements, GetXFontComponent() will reparse the XLFD
 458     fontElements[0].clear();
 459
 460     xFontName = xFontName_;
 461
 462     m_isDefault = FALSE;
 463 }
 464
 465 int wxNativeFontInfo::GetPointSize() const
 466 {
 467     const wxString s = GetXFontComponent(wxXLFD_POINTSIZE);
 468
 469     // return -1 to indicate that the size is unknown
 470     long l;
 471     return s.ToLong(&l) ? l : -1;
 472 }
 473
 474 wxFontStyle wxNativeFontInfo::GetStyle() const
 475 {
 476     const wxString s = GetXFontComponent(wxXLFD_SLANT);
 477
 478     if ( s.length() != 1 )
 479     {
 480         // it is really unknown but we don't have any way to return it from
 481         // here
 482         return wxFONTSTYLE_NORMAL;
 483     }
 484
 485     switch ( s[0] )
 486     {
 487         default:
 488             // again, unknown but consider normal by default
 489
 490         case _T('r'):
 491             return wxFONTSTYLE_NORMAL;
 492
 493         case _T('i'):
 494             return wxFONTSTYLE_ITALIC;
 495
 496         case _T('o'):
 497             return wxFONTSTYLE_SLANT;
 498     }
 499 }
 500
 501 wxFontWeight wxNativeFontInfo::GetWeight() const
 502 {
 503     const wxString s = GetXFontComponent(wxXLFD_WEIGHT).MakeLower();
 504     if ( s.find(_T("bold")) != wxString::npos || s == _T("black") )
 505         return wxFONTWEIGHT_BOLD;
 506     else if ( s == _T("light") )
 507         return wxFONTWEIGHT_LIGHT;
 508
 509     return wxFONTWEIGHT_NORMAL;
 510 }
 511
 512 bool wxNativeFontInfo::GetUnderlined() const
 513 {
 514     // X fonts are never underlined
 515     return FALSE;
 516 }
 517
 518 wxString wxNativeFontInfo::GetFaceName() const
 519 {
 520     // wxWindows facename probably more accurately corresponds to X family
 521     return GetXFontComponent(wxXLFD_FAMILY);
 522 }
 523
 524 wxFontFamily wxNativeFontInfo::GetFamily() const
 525 {
 526     // and wxWindows family -- to X foundry, but we have to translate it to
 527     // wxFontFamily somehow...
 528     wxFAIL_MSG(_T("not implemented")); // GetXFontComponent(wxXLFD_FOUNDRY);
 529
 530     return wxFONTFAMILY_DEFAULT;
 531 }
 532
 533 wxFontEncoding wxNativeFontInfo::GetEncoding() const
 534 {
 535     // we already have the code for this but need to refactor it first
 536     wxFAIL_MSG( _T("not implemented") );
 537
 538     return wxFONTENCODING_MAX;
 539 }
 540
 541 void wxNativeFontInfo::SetPointSize(int pointsize)
 542 {
 543     SetXFontComponent(wxXLFD_POINTSIZE, wxString::Format(_T("%d"), pointsize));
 544 }
 545
 546 void wxNativeFontInfo::SetStyle(wxFontStyle style)
 547 {
 548     wxString s;
 549     switch ( style )
 550     {
 551         case wxFONTSTYLE_ITALIC:
 552             s = _T('i');
 553             break;
 554
 555         case wxFONTSTYLE_SLANT:
 556             s = _T('o');
 557             break;
 558
 559         case wxFONTSTYLE_NORMAL:
 560             s = _T('r');
 561
 562         default:
 563             wxFAIL_MSG( _T("unknown wxFontStyle in wxNativeFontInfo::SetStyle") );
 564             return;
 565     }
 566
 567     SetXFontComponent(wxXLFD_SLANT, s);
 568 }
 569
 570 void wxNativeFontInfo::SetWeight(wxFontWeight weight)
 571 {
 572     wxString s;
 573     switch ( weight )
 574     {
 575         case wxFONTWEIGHT_BOLD:
 576             s = _T("bold");
 577             break;
 578
 579         case wxFONTWEIGHT_LIGHT:
 580             s = _T("light");
 581             break;
 582
 583         case wxFONTWEIGHT_NORMAL:
 584             s = _T("medium");
 585             break;
 586
 587         default:
 588             wxFAIL_MSG( _T("unknown wxFontWeight in wxNativeFontInfo::SetWeight") );
 589             return;
 590     }
 591
 592     SetXFontComponent(wxXLFD_WEIGHT, s);
 593 }
 594
 595 void wxNativeFontInfo::SetUnderlined(bool WXUNUSED(underlined))
 596 {
 597     // can't do this under X
 598 }
 599
 600 void wxNativeFontInfo::SetFaceName(wxString facename)
 601 {
 602     SetXFontComponent(wxXLFD_FAMILY, facename);
 603 }
 604
 605 void wxNativeFontInfo::SetFamily(wxFontFamily family)
 606 {
 607     // wxFontFamily -> X foundry, anyone?
 608     wxFAIL_MSG( _T("not implemented") );
 609
 610     // SetXFontComponent(wxXLFD_FOUNDRY, ...);
 611 }
 612
 613 void wxNativeFontInfo::SetEncoding(wxFontEncoding encoding)
 614 {
 615     wxNativeEncodingInfo info;
 616     if ( wxGetNativeFontEncoding(encoding, &info) )
 617     {
 618         SetXFontComponent(wxXLFD_ENCODING, info.xencoding);
 619         SetXFontComponent(wxXLFD_REGISTRY, info.xregistry);
 620     }
 621 }
 622
 623 // ----------------------------------------------------------------------------
 624 // common functions
 625 // ----------------------------------------------------------------------------
 626
 627 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
 628                              wxNativeEncodingInfo *info)
 629 {
 630     wxCHECK_MSG( info, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
 631
 632     if ( encoding == wxFONTENCODING_DEFAULT )
 633     {
 634         encoding = wxFont::GetDefaultEncoding();
 635     }
 636
 637     switch ( encoding )
 638     {
 639         case wxFONTENCODING_ISO8859_1:
 640         case wxFONTENCODING_ISO8859_2:
 641         case wxFONTENCODING_ISO8859_3:
 642         case wxFONTENCODING_ISO8859_4:
 643         case wxFONTENCODING_ISO8859_5:
 644         case wxFONTENCODING_ISO8859_6:
 645         case wxFONTENCODING_ISO8859_7:
 646         case wxFONTENCODING_ISO8859_8:
 647         case wxFONTENCODING_ISO8859_9:
 648         case wxFONTENCODING_ISO8859_10:
 649         case wxFONTENCODING_ISO8859_11:
 650         case wxFONTENCODING_ISO8859_12:
 651         case wxFONTENCODING_ISO8859_13:
 652         case wxFONTENCODING_ISO8859_14:
 653         case wxFONTENCODING_ISO8859_15:
 654             {
 655                 int cp = encoding - wxFONTENCODING_ISO8859_1 + 1;
 656                 info->xregistry = wxT("iso8859");
 657                 info->xencoding.Printf(wxT("%d"), cp);
 658             }
 659             break;
 660
 661         case wxFONTENCODING_UTF8:
 662             info->xregistry = wxT("iso10646");
 663             info->xencoding = wxT("*");
 664             break;
 665
 666         case wxFONTENCODING_GB2312:
 667             info->xregistry = wxT("GB2312");   // or the otherway round?
 668             info->xencoding = wxT("*");
 669             break;
 670
 671         case wxFONTENCODING_KOI8:
 672             info->xregistry = wxT("koi8");
 673
 674             // we don't make distinction between koi8-r, koi8-u and koi8-ru (so far)
 675             info->xencoding = wxT("*");
 676             break;
 677
 678         case wxFONTENCODING_CP1250:
 679         case wxFONTENCODING_CP1251:
 680         case wxFONTENCODING_CP1252:
 681         case wxFONTENCODING_CP1253:
 682         case wxFONTENCODING_CP1254:
 683         case wxFONTENCODING_CP1255:
 684         case wxFONTENCODING_CP1256:
 685         case wxFONTENCODING_CP1257:
 686             {
 687                 int cp = encoding - wxFONTENCODING_CP1250 + 1250;
 688                 info->xregistry = wxT("microsoft");
 689                 info->xencoding.Printf(wxT("cp%d"), cp);
 690             }
 691             break;
 692
 693         case wxFONTENCODING_SYSTEM:
 694             info->xregistry =
 695             info->xencoding = wxT("*");
 696             break;
 697
 698         default:
 699             // don't know how to translate this encoding into X fontspec
 700             return FALSE;
 701     }
 702
 703     info->encoding = encoding;
 704
 705     return TRUE;
 706 }
 707
 708 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
 709 {
 710     wxString fontspec;
 711     fontspec.Printf(_T("-*-%s-*-*-*-*-*-*-*-*-*-*-%s-%s"),
 712                     !info.facename ? _T("*") : info.facename.c_str(),
 713                     info.xregistry.c_str(),
 714                     info.xencoding.c_str());
 715
 716     return wxTestFontSpec(fontspec);
 717 }
 718
 719 // ----------------------------------------------------------------------------
 720 // X-specific functions
 721 // ----------------------------------------------------------------------------
 722
 723 wxNativeFont wxLoadQueryNearestFont(int pointSize,
 724                                     int family,
 725                                     int style,
 726                                     int weight,
 727                                     bool underlined,
 728                                     const wxString &facename,
 729                                     wxFontEncoding encoding,
 730                                     wxString* xFontName)
 731 {
 732     if ( encoding == wxFONTENCODING_DEFAULT )
 733     {
 734         encoding = wxFont::GetDefaultEncoding();
 735     }
 736
 737     // first determine the encoding - if the font doesn't exist at all in this
 738     // encoding, it's useless to do all other approximations (i.e. size,
 739     // family &c don't matter much)
 740     wxNativeEncodingInfo info;
 741     if ( encoding == wxFONTENCODING_SYSTEM )
 742     {
 743         // This will always work so we don't test to save time
 744         wxGetNativeFontEncoding(wxFONTENCODING_SYSTEM, &info);
 745     }
 746     else
 747     {
 748         if ( !wxGetNativeFontEncoding(encoding, &info) ||
 749              !wxTestFontEncoding(info) )
 750         {
 751 #if wxUSE_FONTMAP
 752             if ( !wxFontMapper::Get()->GetAltForEncoding(encoding, &info) )
 753 #endif // wxUSE_FONTMAP
 754             {
 755                 // unspported encoding - replace it with the default
 756                 //
 757                 // NB: we can't just return 0 from here because wxGTK code doesn't
 758                 //     check for it (i.e. it supposes that we'll always succeed),
 759                 //     so it would provoke a crash
 760                 wxGetNativeFontEncoding(wxFONTENCODING_SYSTEM, &info);
 761             }
 762         }
 763     }
 764
 765     // OK, we have the correct xregistry/xencoding in info structure
 766     wxNativeFont font = 0;
 767
 768     // if we already have the X font name, try to use it
 769     if( xFontName && !xFontName->IsEmpty() )
 770     {
 771         //
 772         //  Make sure point size is correct for scale factor.
 773         //
 774         wxStringTokenizer tokenizer(*xFontName, _T("-"), wxTOKEN_RET_DELIMS);
 775         wxString newFontName;
 776
 777         for(int i = 0; i < 8; i++)
 778           newFontName += tokenizer.NextToken();
 779
 780         (void) tokenizer.NextToken();
 781
 782         newFontName += wxString::Format(wxT("%d-"), pointSize);
 783
 784         while(tokenizer.HasMoreTokens())
 785           newFontName += tokenizer.GetNextToken();
 786
 787         font = wxLoadFont(newFontName);
 788
 789         if(font)
 790           *xFontName = newFontName;
 791     }
 792
 793     // try to load exactly the font requested first
 794     if( !font )
 795     {
 796         font = wxLoadQueryFont( pointSize, family, style, weight,
 797                                 underlined, facename,
 798                                 info.xregistry, info.xencoding,
 799                                 xFontName );
 800     }
 801
 802     if ( !font )
 803     {
 804         // search up and down by stepsize 10
 805         int max_size = pointSize + 20 * (1 + (pointSize/180));
 806         int min_size = pointSize - 20 * (1 + (pointSize/180));
 807
 808         int i;
 809
 810         // Search for smaller size (approx.)
 811         for ( i = pointSize - 10; !font && i >= 10 && i >= min_size; i -= 10 )
 812         {
 813             font = wxLoadQueryFont(i, family, style, weight, underlined,
 814                                    facename, info.xregistry, info.xencoding,
 815                                    xFontName);
 816         }
 817
 818         // Search for larger size (approx.)
 819         for ( i = pointSize + 10; !font && i <= max_size; i += 10 )
 820         {
 821             font = wxLoadQueryFont(i, family, style, weight, underlined,
 822                                    facename, info.xregistry, info.xencoding,
 823                                    xFontName);
 824         }
 825
 826         // Try default family
 827         if ( !font && family != wxDEFAULT )
 828         {
 829             font = wxLoadQueryFont(pointSize, wxDEFAULT, style, weight,
 830                                    underlined, facename,
 831                                    info.xregistry, info.xencoding,
 832                                    xFontName );
 833         }
 834
 835         // ignore size, family, style and weight but try to find font with the
 836         // given facename and encoding
 837         if ( !font )
 838         {
 839             font = wxLoadQueryFont(120, wxDEFAULT, wxNORMAL, wxNORMAL,
 840                                    underlined, facename,
 841                                    info.xregistry, info.xencoding,
 842                                    xFontName);
 843
 844             // ignore family as well
 845             if ( !font )
 846             {
 847                 font = wxLoadQueryFont(120, wxDEFAULT, wxNORMAL, wxNORMAL,
 848                                        underlined, wxEmptyString,
 849                                        info.xregistry, info.xencoding,
 850                                        xFontName);
 851
 852                 // if it still failed, try to get the font of any size but
 853                 // with the requested encoding: this can happen if the
 854                 // encoding is only available in one size which happens to be
 855                 // different from 120
 856                 if ( !font )
 857                 {
 858                     font = wxLoadQueryFont(-1, wxDEFAULT, wxNORMAL, wxNORMAL,
 859                                            FALSE, wxEmptyString,
 860                                            info.xregistry, info.xencoding,
 861                                            xFontName);
 862
 863                     // this should never happen as we had tested for it in the
 864                     // very beginning, but if it does, do return something non
 865                     // NULL or we'd crash in wxFont code
 866                     if ( !font )
 867                     {
 868                         wxFAIL_MSG( _T("this encoding should be available!") );
 869
 870                         font = wxLoadQueryFont(-1,
 871                                                wxDEFAULT, wxNORMAL, wxNORMAL,
 872                                                FALSE, wxEmptyString,
 873                                                _T("*"), _T("*"),
 874                                                xFontName);
 875                     }
 876                 }
 877             }
 878         }
 879     }
 880
 881     return font;
 882 }
 883
 884 // ----------------------------------------------------------------------------
 885 // private functions
 886 // ----------------------------------------------------------------------------
 887
 888 // returns TRUE if there are any fonts matching this font spec
 889 static bool wxTestFontSpec(const wxString& fontspec)
 890 {
 891     // some X servers will fail to load this font because there are too many
 892     // matches so we must test explicitly for this
 893     if ( fontspec == _T("-*-*-*-*-*-*-*-*-*-*-*-*-*-*") )
 894     {
 895         return TRUE;
 896     }
 897
 898     wxNativeFont test = (wxNativeFont) g_fontHash->Get( fontspec );
 899     if (test)
 900     {
 901         return TRUE;
 902     }
 903
 904     test = wxLoadFont(fontspec);
 905     g_fontHash->Put( fontspec, (wxObject*) test );
 906
 907     if ( test )
 908     {
 909         wxFreeFont(test);
 910
 911         return TRUE;
 912     }
 913     else
 914     {
 915         return FALSE;
 916     }
 917 }
 918
 919 static wxNativeFont wxLoadQueryFont(int pointSize,
 920                                     int family,
 921                                     int style,
 922                                     int weight,
 923                                     bool WXUNUSED(underlined),
 924                                     const wxString& facename,
 925                                     const wxString& xregistry,
 926                                     const wxString& xencoding,
 927                                     wxString* xFontName)
 928 {
 929     wxString xfamily;
 930     switch (family)
 931     {
 932         case wxDECORATIVE: xfamily = wxT("lucida"); break;
 933         case wxROMAN:      xfamily = wxT("times");  break;
 934         case wxMODERN:     xfamily = wxT("courier"); break;
 935         case wxSWISS:      xfamily = wxT("helvetica"); break;
 936         case wxTELETYPE:   xfamily = wxT("lucidatypewriter"); break;
 937         case wxSCRIPT:     xfamily = wxT("utopia"); break;
 938         default:           xfamily = wxT("*");
 939     }
 940 #if wxUSE_NANOX
 941     int xweight;
 942     switch (weight)
 943     {
 944          case wxBOLD:
 945              {
 946                  xweight = MWLF_WEIGHT_BOLD;
 947                  break;
 948              }
 949         case wxLIGHT:
 950              {
 951                  xweight = MWLF_WEIGHT_LIGHT;
 952                  break;
 953              }
 954          case wxNORMAL:
 955              {
 956                  xweight = MWLF_WEIGHT_NORMAL;
 957                  break;
 958              }
 959
 960      default:
 961              {
 962                  xweight = MWLF_WEIGHT_DEFAULT;
 963                  break;
 964              }
 965     }
 966     GR_SCREEN_INFO screenInfo;
 967     GrGetScreenInfo(& screenInfo);
 968
 969     int yPixelsPerCM = screenInfo.ydpcm;
 970
 971     // A point is 1/72 of an inch.
 972     // An inch is 2.541 cm.
 973     // So pixelHeight = (pointSize / 72) (inches) * 2.541 (for cm) * yPixelsPerCM (for pixels)
 974     // In fact pointSize is 10 * the normal point size so
 975     // divide by 10.
 976
 977     int pixelHeight = (int) ( (((float)pointSize) / 720.0) * 2.541 * (float) yPixelsPerCM) ;
 978
 979     // An alternative: assume that the screen is 72 dpi.
 980     //int pixelHeight = (int) (((float)pointSize / 720.0) * 72.0) ;
 981     //int pixelHeight = (int) ((float)pointSize / 10.0) ;
 982
 983     GR_LOGFONT logFont;
 984     logFont.lfHeight = pixelHeight;
 985     logFont.lfWidth = 0;
 986     logFont.lfEscapement = 0;
 987     logFont.lfOrientation = 0;
 988     logFont.lfWeight = xweight;
 989     logFont.lfItalic = (style == wxNORMAL ? 0 : 1) ;
 990     logFont.lfUnderline = 0;
 991     logFont.lfStrikeOut = 0;
 992     logFont.lfCharSet = MWLF_CHARSET_DEFAULT; // TODO: select appropriate one
 993     logFont.lfOutPrecision = MWLF_TYPE_DEFAULT;
 994     logFont.lfClipPrecision = 0; // Not used
 995     logFont.lfRoman = (family == wxROMAN ? 1 : 0) ;
 996     logFont.lfSerif = (family == wxSWISS ? 0 : 1) ;
 997     logFont.lfSansSerif = !logFont.lfSerif ;
 998     logFont.lfModern = (family == wxMODERN ? 1 : 0) ;
 999     logFont.lfProportional = (family == wxTELETYPE ? 0 : 1) ;
1000     logFont.lfOblique = 0;
1001     logFont.lfSmallCaps = 0;
1002     logFont.lfPitch = 0; // 0 = default
1003     strcpy(logFont.lfFaceName, facename.c_str());
1004
1005     XFontStruct* fontInfo = (XFontStruct*) malloc(sizeof(XFontStruct));
1006     fontInfo->fid = GrCreateFont((GR_CHAR*) facename.c_str(), pixelHeight, & logFont);
1007     GrGetFontInfo(fontInfo->fid, & fontInfo->info);
1008     return (wxNativeFont) fontInfo;
1009
1010 #else
1011     wxString fontSpec;
1012     if (!facename.IsEmpty())
1013     {
1014         fontSpec.Printf(wxT("-*-%s-*-*-normal-*-*-*-*-*-*-*-*-*"),
1015                         facename.c_str());
1016
1017         if ( wxTestFontSpec(fontSpec) )
1018         {
1019             xfamily = facename;
1020         }
1021         //else: no such family, use default one instead
1022     }
1023
1024     wxString xstyle;
1025     switch (style)
1026     {
1027         case wxSLANT:
1028             fontSpec.Printf(wxT("-*-%s-*-o-*-*-*-*-*-*-*-*-*-*"),
1029                     xfamily.c_str());
1030             if ( wxTestFontSpec(fontSpec) )
1031             {
1032                 xstyle = wxT("o");
1033                 break;
1034             }
1035             // fall through - try wxITALIC now
1036
1037         case wxITALIC:
1038             fontSpec.Printf(wxT("-*-%s-*-i-*-*-*-*-*-*-*-*-*-*"),
1039                     xfamily.c_str());
1040             if ( wxTestFontSpec(fontSpec) )
1041             {
1042                 xstyle = wxT("i");
1043             }
1044             else if ( style == wxITALIC ) // and not wxSLANT
1045             {
1046                 // try wxSLANT
1047                 fontSpec.Printf(wxT("-*-%s-*-o-*-*-*-*-*-*-*-*-*-*"),
1048                         xfamily.c_str());
1049                 if ( wxTestFontSpec(fontSpec) )
1050                 {
1051                     xstyle = wxT("o");
1052                 }
1053                 else
1054                 {
1055                     // no italic, no slant - leave default
1056                     xstyle = wxT("*");
1057                 }
1058             }
1059             break;
1060
1061         default:
1062             wxFAIL_MSG(_T("unknown font style"));
1063             // fall back to normal
1064
1065         case wxNORMAL:
1066             xstyle = wxT("r");
1067             break;
1068     }
1069
1070     wxString xweight;
1071     switch (weight)
1072     {
1073          case wxBOLD:
1074              {
1075                   fontSpec.Printf(wxT("-*-%s-bold-*-*-*-*-*-*-*-*-*-*-*"),
1076                          xfamily.c_str());
1077                   if ( wxTestFontSpec(fontSpec) )
1078                   {
1079                        xweight = wxT("bold");
1080                        break;
1081                   }
1082                   fontSpec.Printf(wxT("-*-%s-heavy-*-*-*-*-*-*-*-*-*-*-*"),
1083                          xfamily.c_str());
1084                   if ( wxTestFontSpec(fontSpec) )
1085                   {
1086                        xweight = wxT("heavy");
1087                        break;
1088                   }
1089                   fontSpec.Printf(wxT("-*-%s-extrabold-*-*-*-*-*-*-*-*-*-*-*"),
1090                          xfamily.c_str());
1091                   if ( wxTestFontSpec(fontSpec) )
1092                   {
1093                       xweight = wxT("extrabold");
1094                       break;
1095                   }
1096                   fontSpec.Printf(wxT("-*-%s-demibold-*-*-*-*-*-*-*-*-*-*-*"),
1097                          xfamily.c_str());
1098                   if ( wxTestFontSpec(fontSpec) )
1099                   {
1100                       xweight = wxT("demibold");
1101                       break;
1102                   }
1103                   fontSpec.Printf(wxT("-*-%s-black-*-*-*-*-*-*-*-*-*-*-*"),
1104                          xfamily.c_str());
1105                   if ( wxTestFontSpec(fontSpec) )
1106                   {
1107                       xweight = wxT("black");
1108                       break;
1109                   }
1110                   fontSpec.Printf(wxT("-*-%s-ultrablack-*-*-*-*-*-*-*-*-*-*-*"),
1111                          xfamily.c_str());
1112                   if ( wxTestFontSpec(fontSpec) )
1113                   {
1114                       xweight = wxT("ultrablack");
1115                       break;
1116                   }
1117               }
1118               break;
1119         case wxLIGHT:
1120              {
1121                   fontSpec.Printf(wxT("-*-%s-light-*-*-*-*-*-*-*-*-*-*-*"),
1122                          xfamily.c_str());
1123                   if ( wxTestFontSpec(fontSpec) )
1124                   {
1125                        xweight = wxT("light");
1126                        break;
1127                   }
1128                   fontSpec.Printf(wxT("-*-%s-thin-*-*-*-*-*-*-*-*-*-*-*"),
1129                          xfamily.c_str());
1130                   if ( wxTestFontSpec(fontSpec) )
1131                   {
1132                        xweight = wxT("thin");
1133                        break;
1134                   }
1135              }
1136              break;
1137          case wxNORMAL:
1138              {
1139                   fontSpec.Printf(wxT("-*-%s-medium-*-*-*-*-*-*-*-*-*-*-*"),
1140                          xfamily.c_str());
1141                   if ( wxTestFontSpec(fontSpec) )
1142                   {
1143                        xweight = wxT("medium");
1144                        break;
1145                   }
1146                   fontSpec.Printf(wxT("-*-%s-normal-*-*-*-*-*-*-*-*-*-*-*"),
1147                          xfamily.c_str());
1148                   if ( wxTestFontSpec(fontSpec) )
1149                   {
1150                        xweight = wxT("normal");
1151                        break;
1152                   }
1153                   fontSpec.Printf(wxT("-*-%s-regular-*-*-*-*-*-*-*-*-*-*-*"),
1154                          xfamily.c_str());
1155                   if ( wxTestFontSpec(fontSpec) )
1156                   {
1157                       xweight = wxT("regular");
1158                       break;
1159                   }
1160                   xweight = wxT("*");
1161               }
1162               break;
1163         default:           xweight = wxT("*"); break;
1164     }
1165
1166     // if pointSize is -1, don't specify any
1167     wxString sizeSpec;
1168     if ( pointSize == -1 )
1169     {
1170         sizeSpec = _T('*');
1171     }
1172     else
1173     {
1174         sizeSpec.Printf(_T("%d"), pointSize);
1175     }
1176
1177     // construct the X font spec from our data
1178     fontSpec.Printf(wxT("-*-%s-%s-%s-normal-*-*-%s-*-*-*-*-%s-%s"),
1179                     xfamily.c_str(), xweight.c_str(), xstyle.c_str(),
1180                     sizeSpec.c_str(), xregistry.c_str(), xencoding.c_str());
1181
1182     if( xFontName )
1183         *xFontName = fontSpec;
1184
1185     return wxLoadFont(fontSpec);
1186 #endif
1187     // wxUSE_NANOX
1188 }
1189
1190 // ----------------------------------------------------------------------------
1191 // wxFontModule
1192 // ----------------------------------------------------------------------------
1193
1194 class wxFontModule : public wxModule
1195 {
1196 public:
1197     bool OnInit();
1198     void OnExit();
1199
1200 private:
1201     DECLARE_DYNAMIC_CLASS(wxFontModule)
1202 };
1203
1204 IMPLEMENT_DYNAMIC_CLASS(wxFontModule, wxModule)
1205
1206 bool wxFontModule::OnInit()
1207 {
1208     g_fontHash = new wxHashTable( wxKEY_STRING );
1209
1210     return TRUE;
1211 }
1212
1213 void wxFontModule::OnExit()
1214 {
1215     delete g_fontHash;
1216
1217     g_fontHash = (wxHashTable *)NULL;
1218 }
1219
1220 #endif // GTK 2.0/1.x
1221