src/FontLoader.C

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