src/gtk/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/font.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // ============================================================================
  11 // declarations
  12 // ============================================================================
  13
  14 // ----------------------------------------------------------------------------
  15 // headers
  16 // ----------------------------------------------------------------------------
  17
  18 #ifdef __GNUG__
  19     #pragma implementation "font.h"
  20 #endif
  21
  22 #include "wx/font.h"
  23 #include "wx/fontutil.h"
  24 #include "wx/cmndata.h"
  25 #include "wx/utils.h"
  26 #include "wx/log.h"
  27 #include "wx/gdicmn.h"
  28 #include "wx/tokenzr.h"
  29 #include "wx/settings.h"
  30
  31 #include <strings.h>
  32
  33 #include "wx/gtk/private.h"
  34 #include <gdk/gdkprivate.h>
  35
  36 // ----------------------------------------------------------------------------
  37 // constants
  38 // ----------------------------------------------------------------------------
  39
  40 // the default size (in points) for the fonts
  41 static const int wxDEFAULT_FONT_SIZE = 12;
  42
  43 // ----------------------------------------------------------------------------
  44 // wxScaledFontList
  45 // ----------------------------------------------------------------------------
  46
  47 // TODO: replace this with a type safe list or hash!!
  48 class wxScaledFontList : public wxList
  49 {
  50 public:
  51     wxScaledFontList() : wxList(wxKEY_INTEGER) { }
  52 };
  53
  54 // ----------------------------------------------------------------------------
  55 // wxFontRefData
  56 // ----------------------------------------------------------------------------
  57
  58 class wxFontRefData : public wxObjectRefData
  59 {
  60 public:
  61     // from broken down font parameters, also default ctor
  62     wxFontRefData(int size = -1,
  63                   int family = wxFONTFAMILY_DEFAULT,
  64                   int style = wxFONTSTYLE_NORMAL,
  65                   int weight = wxFONTWEIGHT_NORMAL,
  66                   bool underlined = FALSE,
  67                   const wxString& faceName = wxEmptyString,
  68                   wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
  69
  70     // from XFLD
  71     wxFontRefData(const wxString& fontname);
  72
  73     // copy ctor
  74     wxFontRefData( const wxFontRefData& data );
  75
  76     virtual ~wxFontRefData();
  77
  78     // do we have the native font info?
  79     bool HasNativeFont() const
  80     {
  81         return !m_nativeFontInfo.IsDefault();
  82     }
  83
  84     // setters: all of them also take care to modify m_nativeFontInfo if we
  85     // have it so as to not lose the information not carried by our fields
  86     void SetPointSize(int pointSize);
  87     void SetFamily(int family);
  88     void SetStyle(int style);
  89     void SetWeight(int weight);
  90     void SetUnderlined(bool underlined);
  91     void SetFaceName(const wxString& facename);
  92     void SetEncoding(wxFontEncoding encoding);
  93
  94     // debugger helper: shows what the font really is
  95     //
  96     // VZ: I need this as my gdb either shows wildly wrong values or crashes
  97     //     when I ask it to "p fontRefData" :-(
  98 #ifdef __WXDEBUG__
  99     void Dump() const
 100     {
 101         wxPrintf(_T("%s-%s-%s-%d-%d\n"),
 102                  m_faceName.c_str(),
 103                  m_weight == wxFONTWEIGHT_NORMAL
 104                     ? _T("normal")
 105                     : m_weight == wxFONTWEIGHT_BOLD
 106                         ? _T("bold")
 107                         : _T("light"),
 108                  m_style == wxFONTSTYLE_NORMAL ? _T("regular") : _T("italic"),
 109                  m_pointSize,
 110                  m_encoding);
 111     }
 112 #endif // Debug
 113
 114 protected:
 115     // common part of all ctors
 116     void Init(int pointSize,
 117               int family,
 118               int style,
 119               int weight,
 120               bool underlined,
 121               const wxString& faceName,
 122               wxFontEncoding encoding);
 123
 124 private:
 125     // the map of font sizes to "GdkFont *"
 126     wxScaledFontList  m_scaled_xfonts;
 127
 128     // the broken down font parameters
 129     int             m_pointSize;
 130     int             m_family,
 131                     m_style,
 132                     m_weight;
 133     bool            m_underlined;
 134     wxString        m_faceName;
 135     wxFontEncoding  m_encoding;
 136
 137     // the native font info, basicly an XFLD
 138     wxNativeFontInfo m_nativeFontInfo;
 139
 140     friend class wxFont;
 141 };
 142
 143 // ============================================================================
 144 // wxFontRefData implementation
 145 // ============================================================================
 146
 147 // ----------------------------------------------------------------------------
 148 // wxFontRefData creation
 149 // ----------------------------------------------------------------------------
 150
 151 void wxFontRefData::Init(int pointSize,
 152                          int family,
 153                          int style,
 154                          int weight,
 155                          bool underlined,
 156                          const wxString& faceName,
 157                          wxFontEncoding encoding)
 158 {
 159     m_family = family == wxFONTFAMILY_DEFAULT ? wxFONTFAMILY_SWISS : family;
 160
 161     m_faceName = faceName;
 162
 163     // we accept both wxDEFAULT and wxNORMAL here - should we?
 164     m_style = style == wxDEFAULT ? wxFONTSTYLE_NORMAL : style;
 165     m_weight = weight == wxDEFAULT ? wxFONTWEIGHT_NORMAL : weight;
 166
 167     // and here, do we really want to forbid creation of the font of the size
 168     // 90 (the value of wxDEFAULT)??
 169     m_pointSize = pointSize == wxDEFAULT ||
 170                     pointSize == -1 ? wxDEFAULT_FONT_SIZE : pointSize;
 171
 172     m_underlined = underlined;
 173     m_encoding = encoding;
 174 }
 175
 176 wxFontRefData::wxFontRefData( const wxFontRefData& data )
 177 {
 178     m_pointSize = data.m_pointSize;
 179     m_family = data.m_family;
 180     m_style = data.m_style;
 181     m_weight = data.m_weight;
 182
 183     m_underlined = data.m_underlined;
 184
 185     m_faceName = data.m_faceName;
 186     m_encoding = data.m_encoding;
 187
 188     m_nativeFontInfo = data.m_nativeFontInfo;
 189 }
 190
 191 wxFontRefData::wxFontRefData(int size, int family, int style,
 192                              int weight, bool underlined,
 193                              const wxString& faceName,
 194                              wxFontEncoding encoding)
 195 {
 196     Init(size, family, style, weight, underlined, faceName, encoding);
 197 }
 198
 199 wxFontRefData::wxFontRefData(const wxString& fontname)
 200 {
 201     // remember the X font name
 202     m_nativeFontInfo.SetXFontName(fontname);
 203
 204     // get the font parameters from the XLFD
 205     // -------------------------------------
 206
 207     m_faceName = m_nativeFontInfo.GetXFontComponent(wxXLFD_FAMILY);
 208
 209     m_weight = wxFONTWEIGHT_NORMAL;
 210
 211     wxString w = m_nativeFontInfo.GetXFontComponent(wxXLFD_WEIGHT).Upper();
 212     if ( !w.empty() && w != _T('*') )
 213     {
 214         // the test below catches all of BOLD, EXTRABOLD, DEMIBOLD, ULTRABOLD
 215         // and BLACK
 216         if ( ((w[0u] == _T('B') && (!strcmp(w.c_str() + 1, _T("OLD")) ||
 217                                    !strcmp(w.c_str() + 1, _T("LACK"))))) ||
 218              strstr(w.c_str() + 1, _T("BOLD")) )
 219         {
 220             m_weight = wxFONTWEIGHT_BOLD;
 221         }
 222         else if ( w == _T("LIGHT") || w == _T("THIN") )
 223         {
 224             m_weight = wxFONTWEIGHT_LIGHT;
 225         }
 226     }
 227
 228     switch ( wxToupper(*m_nativeFontInfo.
 229                             GetXFontComponent(wxXLFD_SLANT).c_str()) )
 230     {
 231         case _T('I'):   // italique
 232             m_style = wxFONTSTYLE_ITALIC;
 233             break;
 234
 235         case _T('O'):   // oblique
 236             m_style = wxFONTSTYLE_SLANT;
 237             break;
 238
 239         default:
 240             m_style = wxFONTSTYLE_NORMAL;
 241     }
 242
 243     long ptSize;
 244     if ( m_nativeFontInfo.GetXFontComponent(wxXLFD_POINTSIZE).ToLong(&ptSize) )
 245     {
 246         // size in XLFD is in 10 point units
 247         m_pointSize = (int)(ptSize / 10);
 248     }
 249     else
 250     {
 251         m_pointSize = wxDEFAULT_FONT_SIZE;
 252     }
 253
 254     // examine the spacing: if the font is monospaced, assume wxTELETYPE
 255     // family for compatibility with the old code which used it instead of
 256     // IsFixedWidth()
 257     if ( m_nativeFontInfo.GetXFontComponent(wxXLFD_SPACING).Upper() == _T('M') )
 258     {
 259         m_family = wxFONTFAMILY_TELETYPE;
 260     }
 261     else // not monospaceed
 262     {
 263         // don't even try guessing it, it doesn't work for too many fonts
 264         // anyhow
 265         m_family = wxFONTFAMILY_UNKNOWN;
 266     }
 267
 268     // X fonts are never underlined...
 269     m_underlined = FALSE;
 270
 271     // deal with font encoding
 272     wxString
 273         registry = m_nativeFontInfo.GetXFontComponent(wxXLFD_REGISTRY).Upper(),
 274         encoding = m_nativeFontInfo.GetXFontComponent(wxXLFD_ENCODING).Upper();
 275
 276     if ( registry == _T("ISO8859") )
 277     {
 278         int cp;
 279         if ( wxSscanf(encoding, wxT("%d"), &cp) == 1 )
 280         {
 281             m_encoding = (wxFontEncoding)(wxFONTENCODING_ISO8859_1 + cp - 1);
 282         }
 283     }
 284     else if ( registry == _T("MICROSOFT") )
 285     {
 286         int cp;
 287         if ( wxSscanf(encoding, wxT("cp125%d"), &cp) == 1 )
 288         {
 289             m_encoding = (wxFontEncoding)(wxFONTENCODING_CP1250 + cp);
 290         }
 291     }
 292     else if ( registry == _T("KOI8") )
 293     {
 294         m_encoding = wxFONTENCODING_KOI8;
 295     }
 296     else // unknown encoding
 297     {
 298         // may be give a warning here?
 299         m_encoding = wxFONTENCODING_SYSTEM;
 300     }
 301 }
 302
 303 wxFontRefData::~wxFontRefData()
 304 {
 305     wxNode *node = m_scaled_xfonts.First();
 306     while (node)
 307     {
 308         GdkFont *font = (GdkFont*)node->Data();
 309         wxNode *next = node->Next();
 310         gdk_font_unref( font );
 311         node = next;
 312     }
 313 }
 314
 315 // ----------------------------------------------------------------------------
 316 // wxFontRefData SetXXX()
 317 // ----------------------------------------------------------------------------
 318
 319 void wxFontRefData::SetPointSize(int pointSize)
 320 {
 321     m_pointSize = pointSize;
 322
 323     if ( HasNativeFont() )
 324     {
 325         wxString size;
 326         if ( pointSize == -1 )
 327             size = _T('*');
 328         else
 329             size.Printf(_T("%d"), 10*pointSize);
 330
 331         m_nativeFontInfo.SetXFontComponent(wxXLFD_POINTSIZE, size);
 332     }
 333 }
 334
 335 void wxFontRefData::SetFamily(int family)
 336 {
 337     m_family = family;
 338
 339     // TODO: what are we supposed to do with m_nativeFontInfo here?
 340 }
 341
 342 void wxFontRefData::SetStyle(int style)
 343 {
 344     m_style = style;
 345
 346     if ( HasNativeFont() )
 347     {
 348         wxString slant;
 349         switch ( style )
 350         {
 351             case wxFONTSTYLE_ITALIC:
 352                 slant = _T('i');
 353                 break;
 354
 355             case wxFONTSTYLE_SLANT:
 356                 slant = _T('o');
 357                 break;
 358
 359             default:
 360                 wxFAIL_MSG( _T("unknown font style") );
 361                 // fall through
 362
 363             case wxFONTSTYLE_NORMAL:
 364                 slant = _T('r');
 365         }
 366
 367         m_nativeFontInfo.SetXFontComponent(wxXLFD_SLANT, slant);
 368     }
 369 }
 370
 371 void wxFontRefData::SetWeight(int weight)
 372 {
 373     m_weight = weight;
 374
 375     if ( HasNativeFont() )
 376     {
 377         wxString boldness;
 378         switch ( weight )
 379         {
 380             case wxFONTWEIGHT_BOLD:
 381                 boldness = _T("bold");
 382                 break;
 383
 384             case wxFONTWEIGHT_LIGHT:
 385                 boldness = _T("light");
 386                 break;
 387
 388             default:
 389                 wxFAIL_MSG( _T("unknown font weight") );
 390                 // fall through
 391
 392             case wxFONTWEIGHT_NORMAL:
 393                 // unspecified
 394                 boldness = _T("medium");
 395         }
 396
 397         m_nativeFontInfo.SetXFontComponent(wxXLFD_WEIGHT, boldness);
 398     }
 399 }
 400
 401 void wxFontRefData::SetUnderlined(bool underlined)
 402 {
 403     m_underlined = underlined;
 404
 405     // the XLFD doesn't have "underlined" field anyhow
 406 }
 407
 408 void wxFontRefData::SetFaceName(const wxString& facename)
 409 {
 410     m_faceName = facename;
 411
 412     if ( HasNativeFont() )
 413     {
 414         m_nativeFontInfo.SetXFontComponent(wxXLFD_FAMILY, facename);
 415     }
 416 }
 417
 418 void wxFontRefData::SetEncoding(wxFontEncoding encoding)
 419 {
 420     m_encoding = encoding;
 421
 422     if ( HasNativeFont() )
 423     {
 424         wxNativeEncodingInfo info;
 425         if ( wxGetNativeFontEncoding(encoding, &info) )
 426         {
 427             m_nativeFontInfo.SetXFontComponent(wxXLFD_REGISTRY, info.xregistry);
 428             m_nativeFontInfo.SetXFontComponent(wxXLFD_ENCODING, info.xencoding);
 429         }
 430     }
 431 }
 432
 433 // ============================================================================
 434 // wxFont implementation
 435 // ============================================================================
 436
 437 // ----------------------------------------------------------------------------
 438 // wxFont creation
 439 // ----------------------------------------------------------------------------
 440
 441 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)
 442
 443 void wxFont::Init()
 444 {
 445 }
 446
 447 wxFont::wxFont(const wxNativeFontInfo& info)
 448 {
 449     Init();
 450
 451     Create(info.GetXFontName());
 452 }
 453
 454 bool wxFont::Create( int pointSize,
 455                      int family,
 456                      int style,
 457                      int weight,
 458                      bool underlined,
 459                      const wxString& face,
 460                      wxFontEncoding encoding)
 461 {
 462     m_refData = new wxFontRefData(pointSize, family, style, weight,
 463                                   underlined, face, encoding);
 464
 465     return TRUE;
 466 }
 467
 468 bool wxFont::Create(const wxString& fontname)
 469 {
 470     // VZ: does this really happen?
 471     if ( fontname.empty() )
 472     {
 473         *this = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 474
 475         return TRUE;
 476     }
 477
 478     m_refData = new wxFontRefData(fontname);
 479
 480     return TRUE;
 481 }
 482
 483 void wxFont::Unshare()
 484 {
 485     if (!m_refData)
 486     {
 487         m_refData = new wxFontRefData();
 488     }
 489     else
 490     {
 491         wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
 492         UnRef();
 493         m_refData = ref;
 494     }
 495 }
 496
 497 wxFont::~wxFont()
 498 {
 499 }
 500
 501 // ----------------------------------------------------------------------------
 502 // accessors
 503 // ----------------------------------------------------------------------------
 504
 505 // all accessors are just forwarded to wxFontRefData which has everything we
 506 // need
 507
 508 int wxFont::GetPointSize() const
 509 {
 510     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 511
 512     return M_FONTDATA->m_pointSize;
 513 }
 514
 515 wxString wxFont::GetFaceName() const
 516 {
 517     wxCHECK_MSG( Ok(), wxT(""), wxT("invalid font") );
 518
 519     return M_FONTDATA->m_faceName;
 520 }
 521
 522 int wxFont::GetFamily() const
 523 {
 524     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 525
 526     return M_FONTDATA->m_family;
 527 }
 528
 529 int wxFont::GetStyle() const
 530 {
 531     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 532
 533     return M_FONTDATA->m_style;
 534 }
 535
 536 int wxFont::GetWeight() const
 537 {
 538     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 539
 540     return M_FONTDATA->m_weight;
 541 }
 542
 543 bool wxFont::GetUnderlined() const
 544 {
 545     wxCHECK_MSG( Ok(), FALSE, wxT("invalid font") );
 546
 547     return M_FONTDATA->m_underlined;
 548 }
 549
 550 wxFontEncoding wxFont::GetEncoding() const
 551 {
 552     wxCHECK_MSG( Ok(), wxFONTENCODING_DEFAULT, wxT("invalid font") );
 553
 554     return M_FONTDATA->m_encoding;
 555 }
 556
 557 wxNativeFontInfo *wxFont::GetNativeFontInfo() const
 558 {
 559     wxCHECK_MSG( Ok(), (wxNativeFontInfo *)NULL, wxT("invalid font") );
 560
 561     if ( M_FONTDATA->m_nativeFontInfo.GetXFontName().empty() )
 562         GetInternalFont();
 563
 564     return new wxNativeFontInfo(M_FONTDATA->m_nativeFontInfo);
 565 }
 566
 567 bool wxFont::IsFixedWidth() const
 568 {
 569     wxCHECK_MSG( Ok(), FALSE, wxT("invalid font") );
 570
 571     if ( M_FONTDATA->HasNativeFont() )
 572     {
 573         // the monospace fonts are supposed to have "M" in the spacing field
 574         wxString spacing = M_FONTDATA->
 575                             m_nativeFontInfo.GetXFontComponent(wxXLFD_SPACING);
 576
 577         return spacing.Upper() == _T('M');
 578     }
 579
 580     return wxFontBase::IsFixedWidth();
 581 }
 582
 583 // ----------------------------------------------------------------------------
 584 // change font attributes
 585 // ----------------------------------------------------------------------------
 586
 587 void wxFont::SetPointSize(int pointSize)
 588 {
 589     Unshare();
 590
 591     M_FONTDATA->SetPointSize(pointSize);
 592 }
 593
 594 void wxFont::SetFamily(int family)
 595 {
 596     Unshare();
 597
 598     M_FONTDATA->SetFamily(family);
 599 }
 600
 601 void wxFont::SetStyle(int style)
 602 {
 603     Unshare();
 604
 605     M_FONTDATA->SetStyle(style);
 606 }
 607
 608 void wxFont::SetWeight(int weight)
 609 {
 610     Unshare();
 611
 612     M_FONTDATA->SetWeight(weight);
 613 }
 614
 615 void wxFont::SetFaceName(const wxString& faceName)
 616 {
 617     Unshare();
 618
 619     M_FONTDATA->SetFaceName(faceName);
 620 }
 621
 622 void wxFont::SetUnderlined(bool underlined)
 623 {
 624     Unshare();
 625
 626     M_FONTDATA->SetUnderlined(underlined);
 627 }
 628
 629 void wxFont::SetEncoding(wxFontEncoding encoding)
 630 {
 631     Unshare();
 632
 633     M_FONTDATA->SetEncoding(encoding);
 634 }
 635
 636 void wxFont::SetNativeFontInfo(const wxNativeFontInfo& info)
 637 {
 638     Unshare();
 639
 640     M_FONTDATA->m_nativeFontInfo = info;
 641 }
 642
 643 // ----------------------------------------------------------------------------
 644 // get internal representation of font
 645 // ----------------------------------------------------------------------------
 646
 647 static GdkFont *g_systemDefaultGuiFont = (GdkFont*) NULL;
 648
 649 // this is also used from tbargtk.cpp and tooltip.cpp, hence extern
 650 extern GdkFont *GtkGetDefaultGuiFont()
 651 {
 652     if (!g_systemDefaultGuiFont)
 653     {
 654         GtkWidget *widget = gtk_button_new();
 655         GtkStyle *def = gtk_rc_get_style( widget );
 656         if (def)
 657         {
 658             g_systemDefaultGuiFont = gdk_font_ref( GET_STYLE_FONT(def) );
 659         }
 660         else
 661         {
 662             def = gtk_widget_get_default_style();
 663             if (def)
 664                 g_systemDefaultGuiFont = gdk_font_ref( GET_STYLE_FONT(def) );
 665         }
 666         gtk_widget_destroy( widget );
 667     }
 668     else
 669     {
 670         // already have it, but ref it once more before returning
 671         gdk_font_ref(g_systemDefaultGuiFont);
 672     }
 673
 674     return g_systemDefaultGuiFont;
 675 }
 676
 677 GdkFont *wxFont::GetInternalFont( float scale ) const
 678 {
 679     GdkFont *font = (GdkFont *) NULL;
 680
 681     wxCHECK_MSG( Ok(), font, wxT("invalid font") )
 682
 683     long int_scale = long(scale * 100.0 + 0.5); /* key for fontlist */
 684     int point_scale = (int)((M_FONTDATA->m_pointSize * 10 * int_scale) / 100);
 685
 686     wxNode *node = M_FONTDATA->m_scaled_xfonts.Find(int_scale);
 687     if (node)
 688     {
 689         font = (GdkFont*)node->Data();
 690     }
 691     else // we don't have this font in this size yet
 692     {
 693         if (*this == wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT))
 694         {
 695             font = GtkGetDefaultGuiFont();
 696         }
 697
 698         if ( !font )
 699         {
 700             // do we have the XLFD?
 701             if ( M_FONTDATA->HasNativeFont() )
 702             {
 703                 font = wxLoadFont(M_FONTDATA->m_nativeFontInfo.GetXFontName());
 704             }
 705
 706             // no XLFD of no exact match - try the approximate one now
 707             if ( !font )
 708             {
 709                 wxString xfontname;
 710                 font = wxLoadQueryNearestFont( point_scale,
 711                                                M_FONTDATA->m_family,
 712                                                M_FONTDATA->m_style,
 713                                                M_FONTDATA->m_weight,
 714                                                M_FONTDATA->m_underlined,
 715                                                M_FONTDATA->m_faceName,
 716                                                M_FONTDATA->m_encoding,
 717                                                &xfontname);
 718                 if ( font )
 719                 {
 720                     M_FONTDATA->m_nativeFontInfo.SetXFontName(xfontname);
 721                 }
 722             }
 723         }
 724
 725         if ( font )
 726         {
 727             M_FONTDATA->m_scaled_xfonts.Append( int_scale, (wxObject*)font );
 728         }
 729     }
 730
 731     // it's quite useless to make it a wxCHECK because we're going to crash
 732     // anyhow...
 733     wxASSERT_MSG( font, wxT("could not load any font?") );
 734
 735     return font;
 736 }
 737