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 FORMS_H_LOCATION
  19 #include "FontLoader.h"
  20 #include "FontInfo.h"
  21 #include "gettext.h"
  22 #include "debug.h"
  23 #include "lyxrc.h"      // lyxrc.font_*
  24 #include "BufferView.h"
  25 #include "LyXView.h"
  26 #include "frontends/GUIRunTime.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
  44 // Destroy font loader
  45 FontLoader::~FontLoader()
  46 {
  47         unload();
  48 }
  49
  50
  51 // Update fonts after zoom, dpi, font names, or norm change
  52 // For now, we just ditch all fonts we have. Later, we should
  53 // reuse the ones that are already loaded.
  54 void FontLoader::update()
  55 {
  56         unload();
  57 }
  58
  59
  60 // Reset font loader
  61 void FontLoader::reset()
  62 {
  63         // Clear font infos, font structs and font metrics
  64         for (int i1 = 0; i1 < 4; ++i1)
  65                 for (int i2 = 0; i2 < 2; ++i2)
  66                         for (int i3 = 0; i3 < 4; ++i3) {
  67                                 fontinfo[i1][i2][i3] = 0;
  68                                 for (int i4 = 0; i4<10; ++i4) {
  69                                         fontstruct[i1][i2][i3][i4] = 0;
  70                                 }
  71                         }
  72 }
  73
  74
  75 // Unload all fonts
  76 void FontLoader::unload()
  77 {
  78         // Unload all fonts
  79         for (int i1 = 0; i1 < 4; ++i1)
  80                 for (int i2 = 0; i2 < 2; ++i2)
  81                         for (int i3 = 0; i3 < 4; ++i3) {
  82                                 if (fontinfo[i1][i2][i3]) {
  83                                         delete fontinfo[i1][i2][i3];
  84                                         fontinfo[i1][i2][i3] = 0;
  85                                 }
  86                                 for (int i4 = 0; i4 < 10; ++i4) {
  87                                         if (fontstruct[i1][i2][i3][i4]) {
  88                                                 XFreeFont(GUIRunTime::x11Display(), fontstruct[i1][i2][i3][i4]);
  89                                                 fontstruct[i1][i2][i3][i4] = 0;
  90                                         }
  91                                 }
  92                         }
  93 }
  94
  95
  96 // Get font info
  97 /* Takes care of finding which font that can match the given request. Tries
  98 different alternatives. */
  99 void FontLoader::getFontinfo(LyXFont::FONT_FAMILY family,
 100                              LyXFont::FONT_SERIES series,
 101                              LyXFont::FONT_SHAPE shape)
 102 {
 103         // Do we have the font info already?
 104         if (fontinfo[family][series][shape] != 0)
 105                 return;
 106
 107         // Special code for the symbol family
 108         if (family == LyXFont::SYMBOL_FAMILY){
 109                 fontinfo[family][series][shape] = new FontInfo("-*-symbol-*");
 110                 return;
 111         }
 112
 113         // Normal font. Let's search for an existing name that matches.
 114         string ffamily;
 115         string fseries;
 116         string fshape;
 117         string norm = lyxrc.font_norm;
 118         string fontname;
 119
 120         FontInfo * fi = new FontInfo();
 121         fontinfo[family][series][shape] = fi;
 122
 123         for (int cfam = 0; cfam < 2; ++cfam) {
 124                 // Determine family name
 125                 switch (family) {
 126                 case LyXFont::ROMAN_FAMILY:
 127                         switch (cfam) {
 128                         case 0: ffamily = lyxrc.roman_font_name; break;
 129                         case 1: ffamily = "-*-times";
 130                         default: cfam = 100;
 131                         }
 132                         break;
 133                 case LyXFont::SANS_FAMILY:
 134                         switch (cfam) {
 135                         case 0: ffamily = lyxrc.sans_font_name; break;
 136                         case 1: ffamily = "-*-helvetica";
 137                         default: cfam = 100;
 138                         }
 139                         break;
 140                 case LyXFont::TYPEWRITER_FAMILY:
 141                         switch (cfam) {
 142                         case 0: ffamily = lyxrc.typewriter_font_name; break;
 143                         case 1: ffamily = "-*-courier";
 144                         default: cfam = 100;
 145                         }
 146                         break;
 147                 default: ;
 148                 }
 149
 150                 for (int cser = 0; cser < 4; ++cser) {
 151                         // Determine series name
 152                         switch (series) {
 153                         case LyXFont::MEDIUM_SERIES:
 154                                 switch (cser) {
 155                                 case 0: fseries = "-medium"; break;
 156                                 case 1: fseries = "-book"; break;
 157                                 case 2: fseries = "-light";
 158                                 default: cser = 100;
 159                                 }
 160                                 break;
 161                         case LyXFont::BOLD_SERIES:
 162                                 switch (cser) {
 163                                 case 0: fseries = "-bold"; break;
 164                                 case 1: fseries = "-black"; break;
 165                                 case 2: fseries = "-demi"; break;
 166                                 case 3: fseries = "-demibold";
 167                                 default: cser = 100;
 168                                 }
 169                                 break;
 170                         default: ;
 171                         }
 172
 173                         for (int csha = 0; csha < 2; ++csha) {
 174                                 // Determine shape name
 175                                 switch (shape) {
 176                                 case LyXFont::UP_SHAPE:
 177                                 case LyXFont::SMALLCAPS_SHAPE:
 178                                         switch (csha) {
 179                                         case 0: fshape = "-r";
 180                                         default: csha = 100;
 181                                         }
 182                                         break;
 183                                 case LyXFont::ITALIC_SHAPE:
 184                                         switch (csha) {
 185                                         case 0: fshape = "-i"; break;
 186                                         case 1: fshape = "-o";
 187                                         default: csha = 100;
 188                                         }
 189                                         break;
 190                                 case LyXFont::SLANTED_SHAPE:
 191                                         switch (csha) {
 192                                         case 0: fshape = "-o"; break;
 193                                         case 1: fshape = "-i";
 194                                         default: csha = 100;
 195                                         }
 196                                         break;
 197                                 default: ;
 198                                 }
 199                                 //
 200                                 fontname = ffamily + fseries + fshape +
 201                                            "-normal-*-*-*-*-*-*-*-" + norm;
 202                                 fi->setPattern(fontname);
 203                                 if (fi->exist()) {
 204                                         return;
 205                                 }
 206                         }
 207                 }
 208         }
 209 }
 210
 211
 212 // A dummy fontstruct used when there is no gui.
 213 namespace {
 214
 215 XFontStruct dummyXFontStruct;
 216 bool dummyXFontStructisGood = false;
 217
 218 } // namespace anon
 219
 220 /// Do load font
 221 XFontStruct * FontLoader::doLoad(LyXFont::FONT_FAMILY family,
 222                                 LyXFont::FONT_SERIES series,
 223                                 LyXFont::FONT_SHAPE shape,
 224                                 LyXFont::FONT_SIZE size)
 225 {
 226         if (!lyxrc.use_gui) {
 227                 if (!dummyXFontStructisGood) {
 228                         // no character specific info
 229                         dummyXFontStruct.per_char = 0;
 230                         // unit ascent on character displays
 231                         dummyXFontStruct.ascent = 1;
 232                         // no descent on character displays
 233                         dummyXFontStruct.descent = 0;
 234                         dummyXFontStructisGood = true;
 235                 }
 236
 237                 return &dummyXFontStruct;
 238         }
 239
 240         getFontinfo(family, series, shape);
 241         int fsize = int( (lyxrc.font_sizes[size] * lyxrc.dpi *
 242                           (lyxrc.zoom/100.0) ) / 72.27 + 0.5 );
 243
 244         string font = fontinfo[family][series][shape]->getFontname(fsize);
 245
 246         if (font.empty()) {
 247                 lyxerr << "No font matches request. Using 'fixed'." << endl;
 248                 lyxerr << "Start LyX as 'lyx -dbg 515' to get more information." << endl;
 249                 font = "fixed";
 250         }
 251
 252         XFontStruct * fs = 0;
 253
 254         current_view->owner()->messagePush(_("Loading font into X-Server..."));
 255
 256         fs = XLoadQueryFont(GUIRunTime::x11Display(), font.c_str());
 257
 258         if (fs == 0) {
 259                 if (font == "fixed") {
 260                         lyxerr << "We're doomed. Can't get 'fixed' font." << endl;
 261                 } else {
 262                         lyxerr << "Could not get font. Using 'fixed'." << endl;
 263                         fs = XLoadQueryFont(GUIRunTime::x11Display(), "fixed");
 264                 }
 265         } else if (lyxerr.debugging(Debug::FONT)) {
 266                 // Tell user the font matching
 267                 LyXFont f;
 268                 f.setFamily(family);
 269                 f.setSeries(series);
 270                 f.setShape(shape);
 271                 f.setSize(size);
 272                 // The rest of the attributes are not interesting
 273                 f.setEmph(LyXFont::INHERIT);
 274                 f.setUnderbar(LyXFont::INHERIT);
 275                 f.setNoun(LyXFont::INHERIT);
 276 #ifndef NO_LATEX
 277                 f.setLatex(LyXFont::INHERIT);
 278 #endif
 279                 f.setColor(LColor::inherit);
 280                 lyxerr << "Font '" << f.stateText(0)
 281                        << "' matched by\n" << font << endl;
 282         }
 283
 284         current_view->owner()->messagePop();
 285
 286         fontstruct[family][series][shape][size] = fs;
 287         return fs;
 288 }