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