src/motif/font.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        font.cpp
   3 // Purpose:     wxFont class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "font.h"
  14 #endif
  15
  16 #include "wx/defs.h"
  17 #include "wx/string.h"
  18 #include "wx/font.h"
  19 #include "wx/gdicmn.h"
  20 #include "wx/utils.h"
  21
  22 #include <Xm/Xm.h>
  23
  24 #if !USE_SHARED_LIBRARIES
  25 IMPLEMENT_DYNAMIC_CLASS(wxFont, wxGDIObject)
  26 #endif
  27
  28 wxXFont::wxXFont()
  29 {
  30     m_fontStruct = (WXFontStructPtr) 0;
  31     m_fontList = (WXFontList) 0;
  32     m_display = (WXDisplay*) 0;
  33     m_scale = 100;
  34 }
  35
  36 wxXFont::~wxXFont()
  37 {
  38     XFontStruct* fontStruct = (XFontStruct*) m_fontStruct;
  39     XmFontList fontList = (XmFontList) m_fontList;
  40
  41     XmFontListFree (fontList);
  42
  43         // TODO: why does freeing the font produce a segv???
  44     // Note that XFreeFont wasn't called in wxWin 1.68 either.
  45         //        XFreeFont((Display*) m_display, fontStruct);
  46 }
  47
  48 wxFontRefData::wxFontRefData()
  49 {
  50     m_style = 0;
  51     m_pointSize = 0;
  52     m_family = 0;
  53     m_style = 0;
  54     m_weight = 0;
  55     m_underlined = 0;
  56     m_faceName = "";
  57 }
  58
  59 wxFontRefData::wxFontRefData(const wxFontRefData& data)
  60 {
  61     m_style = data.m_style;
  62     m_pointSize = data.m_pointSize;
  63     m_family = data.m_family;
  64     m_style = data.m_style;
  65     m_weight = data.m_weight;
  66     m_underlined = data.m_underlined;
  67     m_faceName = data.m_faceName;
  68
  69     // Don't have to copy actual fonts, because they'll be created
  70     // on demand.
  71 }
  72
  73 wxFontRefData::~wxFontRefData()
  74 {
  75     wxNode* node = m_fonts.First();
  76     while (node)
  77     {
  78         wxXFont* f = (wxXFont*) node->Data();
  79         delete f;
  80         node = node->Next();
  81     }
  82     m_fonts.Clear();
  83 }
  84
  85 wxFont::wxFont()
  86 {
  87     if ( wxTheFontList )
  88         wxTheFontList->Append(this);
  89 }
  90
  91 wxFont::wxFont(int pointSize, int family, int style, int weight, bool underlined, const wxString& faceName)
  92 {
  93     Create(pointSize, family, style, weight, underlined, faceName);
  94
  95     if ( wxTheFontList )
  96         wxTheFontList->Append(this);
  97 }
  98
  99 bool wxFont::Create(int pointSize, int family, int style, int weight, bool underlined, const wxString& faceName)
 100 {
 101     UnRef();
 102     m_refData = new wxFontRefData;
 103
 104     M_FONTDATA->m_family = family;
 105     M_FONTDATA->m_style = style;
 106     M_FONTDATA->m_weight = weight;
 107     M_FONTDATA->m_pointSize = pointSize;
 108     M_FONTDATA->m_underlined = underlined;
 109     M_FONTDATA->m_faceName = faceName;
 110
 111     RealizeResource();
 112
 113     return TRUE;
 114 }
 115
 116 wxFont::~wxFont()
 117 {
 118     if (wxTheFontList)
 119         wxTheFontList->DeleteObject(this);
 120 }
 121
 122 bool wxFont::RealizeResource()
 123 {
 124     // TODO: create the font (if there is a native font object)
 125     return FALSE;
 126 }
 127
 128 void wxFont::Unshare()
 129 {
 130         // Don't change shared data
 131         if (!m_refData)
 132     {
 133                 m_refData = new wxFontRefData();
 134         }
 135     else
 136     {
 137                 wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
 138                 UnRef();
 139                 m_refData = ref;
 140         }
 141 }
 142
 143 void wxFont::SetPointSize(int pointSize)
 144 {
 145     Unshare();
 146
 147     M_FONTDATA->m_pointSize = pointSize;
 148
 149     RealizeResource();
 150 }
 151
 152 void wxFont::SetFamily(int family)
 153 {
 154     Unshare();
 155
 156     M_FONTDATA->m_family = family;
 157
 158     RealizeResource();
 159 }
 160
 161 void wxFont::SetStyle(int style)
 162 {
 163     Unshare();
 164
 165     M_FONTDATA->m_style = style;
 166
 167     RealizeResource();
 168 }
 169
 170 void wxFont::SetWeight(int weight)
 171 {
 172     Unshare();
 173
 174     M_FONTDATA->m_weight = weight;
 175
 176     RealizeResource();
 177 }
 178
 179 void wxFont::SetFaceName(const wxString& faceName)
 180 {
 181     Unshare();
 182
 183     M_FONTDATA->m_faceName = faceName;
 184
 185     RealizeResource();
 186 }
 187
 188 void wxFont::SetUnderlined(bool underlined)
 189 {
 190     Unshare();
 191
 192     M_FONTDATA->m_underlined = underlined;
 193
 194     RealizeResource();
 195 }
 196
 197 wxString wxFont::GetFamilyString() const
 198 {
 199   wxString fam("");
 200   switch (GetFamily())
 201   {
 202     case wxDECORATIVE:
 203       fam = "wxDECORATIVE";
 204       break;
 205     case wxROMAN:
 206       fam = "wxROMAN";
 207       break;
 208     case wxSCRIPT:
 209       fam = "wxSCRIPT";
 210       break;
 211     case wxSWISS:
 212       fam = "wxSWISS";
 213       break;
 214     case wxMODERN:
 215       fam = "wxMODERN";
 216       break;
 217     case wxTELETYPE:
 218       fam = "wxTELETYPE";
 219       break;
 220     default:
 221       fam = "wxDEFAULT";
 222       break;
 223   }
 224   return fam;
 225 }
 226
 227 /* New font system */
 228 wxString wxFont::GetFaceName() const
 229 {
 230     wxString str("");
 231     if (M_FONTDATA)
 232             str = M_FONTDATA->m_faceName ;
 233     return str;
 234 }
 235
 236 wxString wxFont::GetStyleString() const
 237 {
 238     wxString styl("");
 239     switch (GetStyle())
 240     {
 241         case wxITALIC:
 242             styl = "wxITALIC";
 243             break;
 244         case wxSLANT:
 245             styl = "wxSLANT";
 246             break;
 247         default:
 248             styl = "wxNORMAL";
 249             break;
 250     }
 251     return styl;
 252 }
 253
 254 wxString wxFont::GetWeightString() const
 255 {
 256     wxString w("");
 257     switch (GetWeight())
 258     {
 259         case wxBOLD:
 260             w = "wxBOLD";
 261             break;
 262         case wxLIGHT:
 263             w = "wxLIGHT";
 264             break;
 265         default:
 266             w = "wxNORMAL";
 267             break;
 268     }
 269     return w;
 270 }
 271
 272 // Find an existing, or create a new, XFontStruct
 273 // based on this wxFont and the given scale. Append the
 274 // font to list in the private data for future reference.
 275 wxXFont* wxFont::GetInternalFont(double scale, WXDisplay* display) const
 276 {
 277   if (!Ok())
 278     return (wxXFont*) NULL;
 279
 280   long intScale = long(scale * 100.0 + 0.5); // key for wxXFont
 281   int pointSize = (M_FONTDATA->m_pointSize * 10 * intScale) / 100;
 282
 283   wxNode* node = M_FONTDATA->m_fonts.First();
 284   while (node)
 285   {
 286     wxXFont* f = (wxXFont*) node->Data();
 287     if ((!display || (f->m_display == display)) && (f->m_scale == intScale))
 288         return f;
 289     node = node->Next();
 290   }
 291
 292   WXFontStructPtr font = LoadQueryFont(pointSize, M_FONTDATA->m_family,
 293     M_FONTDATA->m_style, M_FONTDATA->m_weight, M_FONTDATA->m_underlined);
 294
 295   if (!font)
 296   {
 297         // search up and down by stepsize 10
 298         int max_size = pointSize + 20 * (1 + (pointSize/180));
 299         int min_size = pointSize - 20 * (1 + (pointSize/180));
 300         int i;
 301
 302         // Search for smaller size (approx.)
 303         for (i=pointSize-10; !font && i >= 10 && i >= min_size; i -= 10)
 304             font = LoadQueryFont(i, M_FONTDATA->m_family, M_FONTDATA->m_style, M_FONTDATA->m_weight, M_FONTDATA->m_underlined);
 305         // Search for larger size (approx.)
 306         for (i=pointSize+10; !font && i <= max_size; i += 10)
 307             font = LoadQueryFont(i, M_FONTDATA->m_family, M_FONTDATA->m_style, M_FONTDATA->m_weight, M_FONTDATA->m_underlined);
 308         // Try default family
 309         if (!font && M_FONTDATA->m_family != wxDEFAULT)
 310             font = LoadQueryFont(pointSize, wxDEFAULT, M_FONTDATA->m_style,
 311                                    M_FONTDATA->m_weight, M_FONTDATA->m_underlined);
 312         // Bogus font
 313         if (!font)
 314             font = LoadQueryFont(120, wxDEFAULT, wxNORMAL, wxNORMAL,
 315                                     M_FONTDATA->m_underlined);
 316         wxASSERT_MSG( (font != (XFontStruct*) NULL), "Could not allocate even a default font -- something is wrong." );
 317   }
 318   if (font)
 319   {
 320       wxXFont* f = new wxXFont;
 321       f->m_fontStruct = font;
 322       f->m_display = ( display ? display : wxGetDisplay() );
 323       f->m_scale = intScale;
 324       f->m_fontList = XmFontListCreate ((XFontStruct*) font, XmSTRING_DEFAULT_CHARSET);
 325       M_FONTDATA->m_fonts.Append(f);
 326       return f;
 327   }
 328   return (wxXFont*) NULL;
 329 }
 330
 331 WXFontStructPtr wxFont::LoadQueryFont(int pointSize, int family, int style,
 332    int weight, bool underlined) const
 333 {
 334     char *xfamily;
 335     char *xstyle;
 336     char *xweight;
 337     switch (family)
 338     {
 339       case wxDECORATIVE: xfamily = "lucida";
 340                          break;
 341       case wxROMAN:      xfamily = "times";
 342                          break;
 343       case wxMODERN:     xfamily = "courier";
 344                          break;
 345       case wxSWISS:      xfamily = "lucida";
 346                          break;
 347       case wxDEFAULT:
 348         default:           xfamily = "*";
 349     }
 350     switch (style)
 351     {
 352       case wxITALIC:     xstyle = "i";
 353                          break;
 354       case wxSLANT:      xstyle = "o";
 355                          break;
 356       case wxNORMAL:     xstyle = "r";
 357                          break;
 358       default:           xstyle = "*";
 359                          break;
 360     }
 361     switch (weight)
 362     {
 363       case wxBOLD:       xweight = "bold";
 364                          break;
 365       case wxLIGHT:
 366       case wxNORMAL:     xweight = "medium";
 367                          break;
 368       default:           xweight = "*";
 369                          break;
 370     }
 371
 372     sprintf(wxBuffer, "-*-%s-%s-%s-normal-*-*-%d-*-*-*-*-*-*",
 373             xfamily, xweight, xstyle, pointSize);
 374
 375     Display *dpy = (Display*) wxGetDisplay();
 376     XFontStruct* font = XLoadQueryFont(dpy, wxBuffer);
 377
 378     return (WXFontStructPtr) font;
 379 }