src/gtk/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 <gdk/gdk.h>
  34 #include <gdk/gdkprivate.h>
  35 #include <gtk/gtk.h>
  36
  37 // ----------------------------------------------------------------------------
  38 // wxFontRefData
  39 // ----------------------------------------------------------------------------
  40
  41 class wxFontRefData : public wxObjectRefData
  42 {
  43 public:
  44     wxFontRefData(int size = wxDEFAULT,
  45                   int family = wxDEFAULT,
  46                   int style = wxDEFAULT,
  47                   int weight = wxDEFAULT,
  48                   bool underlined = FALSE,
  49                   const wxString& faceName = wxEmptyString,
  50                   wxFontEncoding encoding = wxFONTENCODING_DEFAULT);
  51     wxFontRefData( const wxFontRefData& data );
  52     virtual ~wxFontRefData();
  53
  54 protected:
  55     // common part of all ctors
  56     void Init(int pointSize,
  57               int family,
  58               int style,
  59               int weight,
  60               bool underlined,
  61               const wxString& faceName,
  62               wxFontEncoding encoding);
  63
  64 private:
  65     wxList          m_scaled_xfonts;
  66     int             m_pointSize;
  67     int             m_family,
  68                     m_style,
  69                     m_weight;
  70     bool            m_underlined;
  71     wxString        m_faceName;
  72     wxFontEncoding  m_encoding;
  73
  74     friend wxFont;
  75 };
  76
  77 // ============================================================================
  78 // implementation
  79 // ============================================================================
  80
  81 // ----------------------------------------------------------------------------
  82 // wxFontRefData
  83 // ----------------------------------------------------------------------------
  84
  85 void wxFontRefData::Init(int pointSize,
  86                          int family,
  87                          int style,
  88                          int weight,
  89                          bool underlined,
  90                          const wxString& faceName,
  91                          wxFontEncoding encoding)
  92 {
  93     if (family == wxDEFAULT)
  94         m_family = wxSWISS;
  95     else
  96         m_family = family;
  97
  98     m_faceName = faceName;
  99
 100     if (style == wxDEFAULT)
 101         m_style = wxNORMAL;
 102     else
 103         m_style = style;
 104
 105     if (weight == wxDEFAULT)
 106         m_weight = wxNORMAL;
 107     else
 108         m_weight = weight;
 109
 110     if (pointSize == wxDEFAULT)
 111         m_pointSize = 12;
 112     else
 113         m_pointSize = pointSize;
 114
 115     m_underlined = underlined;
 116     m_encoding = encoding;
 117 }
 118
 119 wxFontRefData::wxFontRefData( const wxFontRefData& data )
 120     : m_scaled_xfonts(wxKEY_INTEGER)
 121 {
 122     Init(data.m_pointSize, data.m_family, data.m_style, data.m_weight,
 123         data.m_underlined, data.m_faceName, data.m_encoding);
 124 }
 125
 126 wxFontRefData::wxFontRefData(int size, int family, int style,
 127     int weight, bool underlined, const wxString& faceName, wxFontEncoding encoding )
 128     : m_scaled_xfonts(wxKEY_INTEGER)
 129 {
 130     Init(size, family, style, weight,
 131         underlined, faceName, encoding);
 132 }
 133
 134 wxFontRefData::~wxFontRefData()
 135 {
 136     wxNode *node = m_scaled_xfonts.First();
 137     while (node)
 138     {
 139         GdkFont *font = (GdkFont*)node->Data();
 140         wxNode *next = node->Next();
 141         gdk_font_unref( font );
 142         node = next;
 143     }
 144 }
 145
 146 // ----------------------------------------------------------------------------
 147 // wxFont
 148 // ----------------------------------------------------------------------------
 149
 150 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)
 151
 152 void wxFont::Init()
 153 {
 154     if (wxTheFontList)
 155         wxTheFontList->Append( this );
 156 }
 157
 158 wxFont::wxFont( const wxString& fontname, const wxFontData& fontdata )
 159 {
 160     Init();
 161
 162     wxCHECK_RET( !!fontname, _T("invalid font spec") );
 163
 164     m_refData = new wxFontRefData();
 165
 166     wxString tmp;
 167
 168     wxStringTokenizer tn( fontname, wxT("-") );
 169
 170     tn.GetNextToken();                           // skip initial empty token
 171     tn.GetNextToken();                           // foundry
 172
 173     M_FONTDATA->m_faceName = tn.GetNextToken();  // family
 174
 175     tmp = tn.GetNextToken().MakeUpper();         // weight
 176     if (tmp == wxT("BOLD")) M_FONTDATA->m_weight = wxBOLD;
 177     if (tmp == wxT("BLACK")) M_FONTDATA->m_weight = wxBOLD;
 178     if (tmp == wxT("EXTRABOLD")) M_FONTDATA->m_weight = wxBOLD;
 179     if (tmp == wxT("DEMIBOLD")) M_FONTDATA->m_weight = wxBOLD;
 180     if (tmp == wxT("ULTRABOLD")) M_FONTDATA->m_weight = wxBOLD;
 181
 182     if (tmp == wxT("LIGHT")) M_FONTDATA->m_weight = wxLIGHT;
 183     if (tmp == wxT("THIN")) M_FONTDATA->m_weight = wxLIGHT;
 184
 185     tmp = tn.GetNextToken().MakeUpper();        // slant
 186     if (tmp == wxT("I")) M_FONTDATA->m_style = wxITALIC;
 187     if (tmp == wxT("O")) M_FONTDATA->m_style = wxITALIC;
 188
 189     tn.GetNextToken();                           // set width
 190     tn.GetNextToken();                           // add. style
 191     tn.GetNextToken();                           // pixel size
 192
 193     tmp = tn.GetNextToken();                     // pointsize
 194     if (tmp != wxT("*"))
 195     {
 196         long num = wxStrtol (tmp.c_str(), (wxChar **) NULL, 10);
 197         M_FONTDATA->m_pointSize = (int)(num / 10);
 198     }
 199
 200     tn.GetNextToken();                           // x-res
 201     tn.GetNextToken();                           // y-res
 202
 203     tmp = tn.GetNextToken().MakeUpper();         // spacing
 204
 205     if (tmp == wxT("M"))
 206         M_FONTDATA->m_family = wxMODERN;
 207     else if (M_FONTDATA->m_faceName == wxT("TIMES"))
 208         M_FONTDATA->m_family = wxROMAN;
 209     else if (M_FONTDATA->m_faceName == wxT("HELVETICA"))
 210         M_FONTDATA->m_family = wxSWISS;
 211     else if (M_FONTDATA->m_faceName == wxT("LUCIDATYPEWRITER"))
 212         M_FONTDATA->m_family = wxTELETYPE;
 213     else if (M_FONTDATA->m_faceName == wxT("LUCIDA"))
 214         M_FONTDATA->m_family = wxDECORATIVE;
 215     else if (M_FONTDATA->m_faceName == wxT("UTOPIA"))
 216         M_FONTDATA->m_family = wxSCRIPT;
 217
 218     tn.GetNextToken();                           // avg width
 219
 220     // deal with font encoding
 221     M_FONTDATA->m_encoding = fontdata.GetEncoding();
 222     if ( M_FONTDATA->m_encoding == wxFONTENCODING_SYSTEM )
 223     {
 224         wxString registry = tn.GetNextToken().MakeUpper(),
 225                  encoding = tn.GetNextToken().MakeUpper();
 226
 227         if ( registry == _T("ISO8859") )
 228         {
 229             int cp;
 230             if ( wxSscanf(encoding, wxT("%d"), &cp) == 1 )
 231             {
 232                 M_FONTDATA->m_encoding =
 233                     (wxFontEncoding)(wxFONTENCODING_ISO8859_1 + cp - 1);
 234             }
 235         }
 236         else if ( registry == _T("MICROSOFT") )
 237         {
 238             int cp;
 239             if ( wxSscanf(encoding, wxT("cp125%d"), &cp) == 1 )
 240             {
 241                 M_FONTDATA->m_encoding =
 242                     (wxFontEncoding)(wxFONTENCODING_CP1250 + cp);
 243             }
 244         }
 245         else if ( registry == _T("KOI8") )
 246         {
 247             M_FONTDATA->m_encoding = wxFONTENCODING_KOI8;
 248         }
 249         //else: unknown encoding - may be give a warning here?
 250     }
 251 }
 252
 253 bool wxFont::Create( int pointSize,
 254                      int family,
 255                      int style,
 256                      int weight,
 257                      bool underlined,
 258                      const wxString& face,
 259                      wxFontEncoding encoding )
 260 {
 261     m_refData = new wxFontRefData(pointSize, family, style, weight,
 262                                   underlined, face, encoding);
 263
 264     return TRUE;
 265 }
 266
 267 void wxFont::Unshare()
 268 {
 269     if (!m_refData)
 270     {
 271         m_refData = new wxFontRefData();
 272     }
 273     else
 274     {
 275         wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
 276         UnRef();
 277         m_refData = ref;
 278     }
 279 }
 280
 281 wxFont::~wxFont()
 282 {
 283     if (wxTheFontList)
 284         wxTheFontList->DeleteObject( this );
 285 }
 286
 287 // ----------------------------------------------------------------------------
 288 // accessors
 289 // ----------------------------------------------------------------------------
 290
 291 int wxFont::GetPointSize() const
 292 {
 293     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 294
 295     return M_FONTDATA->m_pointSize;
 296 }
 297
 298 wxString wxFont::GetFaceName() const
 299 {
 300     wxCHECK_MSG( Ok(), wxT(""), wxT("invalid font") );
 301
 302     return M_FONTDATA->m_faceName;
 303 }
 304
 305 int wxFont::GetFamily() const
 306 {
 307     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 308
 309     return M_FONTDATA->m_family;
 310 }
 311
 312 int wxFont::GetStyle() const
 313 {
 314     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 315
 316     return M_FONTDATA->m_style;
 317 }
 318
 319 int wxFont::GetWeight() const
 320 {
 321     wxCHECK_MSG( Ok(), 0, wxT("invalid font") );
 322
 323     return M_FONTDATA->m_weight;
 324 }
 325
 326 bool wxFont::GetUnderlined() const
 327 {
 328     wxCHECK_MSG( Ok(), FALSE, wxT("invalid font") );
 329
 330     return M_FONTDATA->m_underlined;
 331 }
 332
 333
 334 wxFontEncoding wxFont::GetEncoding() const
 335 {
 336     wxCHECK_MSG( Ok(), wxFONTENCODING_DEFAULT, wxT("invalid font") );
 337
 338     return M_FONTDATA->m_encoding;
 339 }
 340
 341 // ----------------------------------------------------------------------------
 342 // change font attributes
 343 // ----------------------------------------------------------------------------
 344
 345 void wxFont::SetPointSize(int pointSize)
 346 {
 347     Unshare();
 348
 349     M_FONTDATA->m_pointSize = pointSize;
 350 }
 351
 352 void wxFont::SetFamily(int family)
 353 {
 354     Unshare();
 355
 356     M_FONTDATA->m_family = family;
 357 }
 358
 359 void wxFont::SetStyle(int style)
 360 {
 361     Unshare();
 362
 363     M_FONTDATA->m_style = style;
 364 }
 365
 366 void wxFont::SetWeight(int weight)
 367 {
 368     Unshare();
 369
 370     M_FONTDATA->m_weight = weight;
 371 }
 372
 373 void wxFont::SetFaceName(const wxString& faceName)
 374 {
 375     Unshare();
 376
 377     M_FONTDATA->m_faceName = faceName;
 378 }
 379
 380 void wxFont::SetUnderlined(bool underlined)
 381 {
 382     Unshare();
 383
 384     M_FONTDATA->m_underlined = underlined;
 385 }
 386
 387 void wxFont::SetEncoding(wxFontEncoding encoding)
 388 {
 389     Unshare();
 390
 391     M_FONTDATA->m_encoding = encoding;
 392 }
 393
 394 // ----------------------------------------------------------------------------
 395 // get internal representation of font
 396 // ----------------------------------------------------------------------------
 397
 398 static GdkFont *g_systemDefaultGuiFont = (GdkFont*) NULL;
 399
 400 static GdkFont *GtkGetDefaultGuiFont()
 401 {
 402     if (!g_systemDefaultGuiFont)
 403     {
 404         GtkWidget *widget = gtk_button_new();
 405         GtkStyle *def = gtk_rc_get_style( widget );
 406         if (def)
 407         {
 408             g_systemDefaultGuiFont = gdk_font_ref( def->font );
 409         }
 410         else
 411         {
 412             def = gtk_widget_get_default_style();
 413             if (def)
 414                 g_systemDefaultGuiFont = gdk_font_ref( def->font );
 415         }
 416         gtk_widget_destroy( widget );
 417     }
 418     return g_systemDefaultGuiFont;
 419 }
 420
 421 GdkFont *wxFont::GetInternalFont( float scale ) const
 422 {
 423     if (!Ok())
 424     {
 425         wxFAIL_MSG( wxT("invalid font") );
 426
 427         return (GdkFont*) NULL;
 428     }
 429
 430     long int_scale = long(scale * 100.0 + 0.5); /* key for fontlist */
 431     int point_scale = (int)((M_FONTDATA->m_pointSize * 10 * int_scale) / 100);
 432     GdkFont *font = (GdkFont *) NULL;
 433
 434     wxNode *node = M_FONTDATA->m_scaled_xfonts.Find(int_scale);
 435     if (node)
 436     {
 437         font = (GdkFont*)node->Data();
 438     }
 439     else
 440     {
 441         if (*this == wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT))
 442         {
 443             font = GtkGetDefaultGuiFont();
 444         }
 445         if (!font)
 446         {
 447             font = wxLoadQueryNearestFont( point_scale,
 448                                            M_FONTDATA->m_family,
 449                                            M_FONTDATA->m_style,
 450                                            M_FONTDATA->m_weight,
 451                                            M_FONTDATA->m_underlined,
 452                                            M_FONTDATA->m_faceName,
 453                                            M_FONTDATA->m_encoding );
 454         }
 455
 456         M_FONTDATA->m_scaled_xfonts.Append( int_scale, (wxObject*)font );
 457     }
 458
 459     // it's quite useless to make it a wxCHECK because we're going to crash
 460     // anyhow...
 461     wxASSERT_MSG( font, wxT("could not load any font?") );
 462
 463     return font;
 464 }
 465