src/FontLoader.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *          Copyright 1997 Asger Alstrup
   7  *           and the LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12 #include <cmath>        // fabs()
  13
  14 #ifdef __GNUG__
  15 #pragma implementation "FontLoader.h"
  16 #endif
  17
  18 #include "gettext.h"
  19 #include "FontLoader.h"
  20 #include "FontInfo.h"
  21 #include "debug.h"
  22 #include "lyxrc.h"      // lyxrc.font_*
  23 #include "BufferView.h"
  24 #include "LyXView.h"
  25
  26 using std::endl;
  27
  28 extern BufferView * current_view;
  29
  30
  31 // The global fontloader
  32 FontLoader fontloader;
  33
  34
  35 // Initialize font loader
  36 FontLoader::FontLoader()
  37 {
  38         reset();
  39 }
  40
  41
  42 // Destroy font loader
  43 FontLoader::~FontLoader()
  44 {
  45         unload();
  46 }
  47
  48
  49 // Update fonts after zoom, dpi, font names, or norm change
  50 // For now, we just ditch all fonts we have. Later, we should
  51 // reuse the ones that are already loaded.
  52 void FontLoader::update()
  53 {
  54         unload();
  55 }
  56
  57
  58 // Reset font loader
  59 void FontLoader::reset()
  60 {
  61         // Clear font infos, font structs and font metrics
  62         for (int i1 = 0; i1 < 4; ++i1)
  63                 for (int i2 = 0; i2 < 2; ++i2)
  64                         for (int i3 = 0; i3 < 4; ++i3) {
  65                                 fontinfo[i1][i2][i3] = 0;
  66                                 for (int i4 = 0; i4<10; ++i4) {
  67                                         fontstruct[i1][i2][i3][i4] = 0;
  68                                 }
  69                         }
  70 }
  71
  72
  73 // Unload all fonts
  74 void FontLoader::unload()
  75 {
  76         // Unload all fonts
  77         for (int i1 = 0; i1 < 4; ++i1)
  78                 for (int i2 = 0; i2 < 2; ++i2)
  79                         for (int i3 = 0; i3 < 4; ++i3) {
  80                                 if (fontinfo[i1][i2][i3]) {
  81                                         delete fontinfo[i1][i2][i3];
  82                                         fontinfo[i1][i2][i3] = 0;
  83                                 }
  84                                 for (int i4 = 0; i4 < 10; ++i4) {
  85                                         if (fontstruct[i1][i2][i3][i4]) {
  86                                                 XFreeFont(fl_get_display(), fontstruct[i1][i2][i3][i4]);
  87                                                 fontstruct[i1][i2][i3][i4] = 0;
  88                                         }
  89                                 }
  90                         }
  91 }
  92
  93
  94 // Get font info
  95 /* Takes care of finding which font that can match the given request. Tries
  96 different alternatives. */
  97 void FontLoader::getFontinfo(LyXFont::FONT_FAMILY family,
  98                              LyXFont::FONT_SERIES series,
  99                              LyXFont::FONT_SHAPE shape)
 100 {
 101         // Do we have the font info already?
 102         if (fontinfo[family][series][shape] != 0)
 103                 return;
 104
 105         // Special code for the symbol family
 106         if (family == LyXFont::SYMBOL_FAMILY){
 107                 fontinfo[family][series][shape] = new FontInfo("-*-symbol-*");
 108                 return;
 109         }
 110
 111         // Normal font. Let's search for an existing name that matches.
 112         string ffamily;
 113         string fseries;
 114         string fshape;
 115         string norm = lyxrc.font_norm;
 116         string fontname;
 117
 118         FontInfo * fi = new FontInfo();
 119         fontinfo[family][series][shape] = fi;
 120
 121         for (int cfam = 0; cfam < 2; ++cfam) {
 122                 // Determine family name
 123                 switch (family) {
 124                 case LyXFont::ROMAN_FAMILY:
 125                         switch (cfam) {
 126                         case 0: ffamily = lyxrc.roman_font_name; break;
 127                         case 1: ffamily = "-*-times";
 128                         default: cfam = 100;
 129                         }
 130                         break;
 131                 case LyXFont::SANS_FAMILY:
 132                         switch (cfam) {
 133                         case 0: ffamily = lyxrc.sans_font_name; break;
 134                         case 1: ffamily = "-*-helvetica";
 135                         default: cfam = 100;
 136                         }
 137                         break;
 138                 case LyXFont::TYPEWRITER_FAMILY:
 139                         switch (cfam) {
 140                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 141                         case 1: ffamily = "-*-courier";
 142                         default: cfam = 100;
 143                         }
 144                         break;
 145                 default: ;
 146                 }
 147
 148                 for (int cser = 0; cser < 4; ++cser) {
 149                         // Determine series name
 150                         switch (series) {
 151                         case LyXFont::MEDIUM_SERIES:
 152                                 switch (cser) {
 153                                 case 0: fseries = "-medium"; break;
 154                                 case 1: fseries = "-book"; break;
 155                                 case 2: fseries = "-light";
 156                                 default: cser = 100;
 157                                 }
 158                                 break;
 159                         case LyXFont::BOLD_SERIES:
 160                                 switch (cser) {
 161                                 case 0: fseries = "-bold"; break;
 162                                 case 1: fseries = "-black"; break;
 163                                 case 2: fseries = "-demi"; break;
 164                                 case 3: fseries = "-demibold";
 165                                 default: cser = 100;
 166                                 }
 167                                 break;
 168                         default: ;
 169                         }
 170
 171                         for (int csha = 0; csha < 2; ++csha) {
 172                                 // Determine shape name
 173                                 switch (shape) {
 174                                 case LyXFont::UP_SHAPE:
 175                                 case LyXFont::SMALLCAPS_SHAPE:
 176                                         switch (csha) {
 177                                         case 0: fshape = "-r";
 178                                         default: csha = 100;
 179                                         }
 180                                         break;
 181                                 case LyXFont::ITALIC_SHAPE:
 182                                         switch (csha) {
 183                                         case 0: fshape = "-i"; break;
 184                                         case 1: fshape = "-o";
 185                                         default: csha = 100;
 186                                         }
 187                                         break;
 188                                 case LyXFont::SLANTED_SHAPE:
 189                                         switch (csha) {
 190                                         case 0: fshape = "-o"; break;
 191                                         case 1: fshape = "-i";
 192                                         default: csha = 100;
 193                                         }
 194                                         break;
 195                                 default: ;
 196                                 }
 197                                 //
 198                                 fontname = ffamily + fseries + fshape +
 199                                            "-normal-*-*-*-*-*-*-*-" + norm;
 200                                 fi->setPattern(fontname);
 201                                 if (fi->exist()) {
 202                                         return;
 203                                 }
 204                         }
 205                 }
 206         }
 207 }
 208
 209
 210 // A dummy fontstruct used when there is no gui.
 211 namespace {
 212
 213 XFontStruct dummyXFontStruct;
 214 bool dummyXFontStructisGood = false;
 215
 216 } // namespace anon
 217
 218 /// Do load font
 219 XFontStruct * FontLoader::doLoad(LyXFont::FONT_FAMILY family,
 220                                 LyXFont::FONT_SERIES series,
 221                                 LyXFont::FONT_SHAPE shape,
 222                                 LyXFont::FONT_SIZE size)
 223 {
 224         if (!lyxrc.use_gui) {
 225                 if (!dummyXFontStructisGood) {
 226                         // no character specific info
 227                         dummyXFontStruct.per_char = 0;
 228                         // unit ascent on character displays
 229                         dummyXFontStruct.ascent = 1;
 230                         // no descent on character displays
 231                         dummyXFontStruct.descent = 0;
 232                         dummyXFontStructisGood = true;
 233                 }
 234
 235                 return &dummyXFontStruct;
 236         }
 237
 238         getFontinfo(family, series, shape);
 239         int fsize = int( (lyxrc.font_sizes[size] * lyxrc.dpi *
 240                           (lyxrc.zoom/100.0) ) / 72.27 + 0.5 );
 241
 242         string font = fontinfo[family][series][shape]->getFontname(fsize);
 243
 244         if (font.empty()) {
 245                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 246                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 247                 font = "fixed";
 248         }
 249
 250         XFontStruct * fs = 0;
 251
 252         current_view->owner()->messagePush(_("Loading font into X-Server..."));
 253
 254         fs = XLoadQueryFont(fl_get_display(), font.c_str());
 255
 256         if (fs == 0) {
 257                 if (font == "fixed") {
 258                         lyxerr << "We're doomed. Can't get 'fixed' font." << endl;
 259                 } else {
 260                         lyxerr << "Could not get font. Using 'fixed'." << endl;
 261                         fs = XLoadQueryFont(fl_get_display(), "fixed");
 262                 }
 263         } else if (lyxerr.debugging(Debug::FONT)) {
 264                 // Tell user the font matching
 265                 LyXFont f;
 266                 f.setFamily(family);
 267                 f.setSeries(series);
 268                 f.setShape(shape);
 269                 f.setSize(size);
 270                 // The rest of the attributes are not interesting
 271                 f.setEmph(LyXFont::INHERIT);
 272                 f.setUnderbar(LyXFont::INHERIT);
 273                 f.setNoun(LyXFont::INHERIT);
 274                 f.setLatex(LyXFont::INHERIT);
 275                 f.setColor(LColor::inherit);
 276                 lyxerr << "Font '" << f.stateText(0)
 277                        << "' matched by\n" << font << endl;
 278         }
 279
 280         current_view->owner()->messagePop();
 281
 282         fontstruct[family][series][shape][size] = fs;
 283         return fs;
 284 }