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