Dogcows Code - chaz/openbox/blob - src/Font.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2 // Font.cc for Blackbox - an X11 Window manager
   3 // Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh@debian.org>
   4 // Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a
   7 // copy of this software and associated documentation files (the "Software"),
   8 // to deal in the Software without restriction, including without limitation
   9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 // and/or sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22 // DEALINGS IN THE SOFTWARE.
  23
  24 #ifdef    HAVE_CONFIG_H
  25 #  include "../config.h"
  26 #endif // HAVE_CONFIG_H
  27
  28 extern "C" {
  29 #ifdef HAVE_STDLIB_H
  30 #  include <stdlib.h>
  31 #endif // HAVE_STDLIB_H
  32 }
  33
  34 #include <iostream>
  35 #include <algorithm>
  36
  37 using std::string;
  38 using std::cerr;
  39 using std::endl;
  40
  41 #include "i18n.hh"
  42 #include "Font.hh"
  43 #include "Util.hh"
  44 #include "GCCache.hh"
  45 #include "Color.hh"
  46
  47 string      BFont::_fallback_font   = "fixed";
  48
  49 #ifdef XFT
  50 BFont::BFont(Display *d, BScreen *screen, const string &family, int size,
  51              bool bold, bool italic, bool antialias) :
  52                                           _display(d),
  53                                           _screen(screen),
  54                                           _family(family),
  55                                           _simplename(False),
  56                                           _size(size),
  57                                           _bold(bold),
  58                                           _italic(italic),
  59                                           _antialias(antialias),
  60                                           _xftfont(0),
  61                                           _font(0),
  62                                           _fontset(0),
  63                                           _fontset_extents(0) {
  64   _valid = False;
  65
  66   _xftfont = XftFontOpen(_display, _screen->getScreenNumber(),
  67                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  68                          XFT_SIZE,   XftTypeInteger, _size,
  69                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  70                                                       XFT_WEIGHT_BOLD :
  71                                                       XFT_WEIGHT_MEDIUM),
  72                          XFT_SLANT,  XftTypeInteger, (_italic ?
  73                                                       XFT_SLANT_ITALIC :
  74                                                       XFT_SLANT_ROMAN),
  75                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  76                          0);
  77   if (! _xftfont)
  78     return; // failure
  79
  80   _font = XLoadQueryFont(_display, buildXlfd().c_str());
  81   if (! _font)
  82     return; // failure
  83
  84   _valid = True;
  85 }
  86 #endif
  87
  88
  89 BFont::BFont(Display *d, BScreen *screen, const string &xlfd) :
  90                                        _display(d),
  91                                        _screen(screen),
  92 #ifdef    XFT
  93                                        _antialias(False),
  94                                        _xftfont(0),
  95 #endif // XFT
  96                                        _font(0),
  97                                        _fontset(0),
  98                                        _fontset_extents(0) {
  99   string int_xlfd;
 100   if (xlfd.empty())
 101     int_xlfd = _fallback_font;
 102   else
 103     int_xlfd = xlfd;
 104
 105   if ((_valid = createXFont(int_xlfd)))
 106     return; // success
 107
 108   if (int_xlfd != _fallback_font) {
 109     // try the fallback
 110     cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 111       "Falling back to default '" << _fallback_font << "'" << endl;
 112
 113     if ((_valid = createXFont(_fallback_font)))
 114       return; // success
 115   }
 116
 117   cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 118     "Giving up!" << endl;
 119   return; // failure
 120 }
 121
 122
 123 bool BFont::createXFont(const std::string &xlfd) {
 124   /*
 125      Even though this is only used for font sets (multibyte), it is still parsed
 126      out so that the bold/italic/etc information is still available from the
 127      class when using non-multibyte.
 128
 129      This is where _simplename, _bold, _italic, and _size are initialized, since
 130      they are not initialized in the constructor. This needs to occur before
 131      calling any Xlfd-building functions.
 132   */
 133   if (! parseXlfd(xlfd))
 134     return False;
 135
 136   if (i18n.multibyte()) {
 137     char **missing, *def = "-";
 138     int nmissing;
 139
 140     _fontset = XCreateFontSet(_display, buildMultibyteXlfd().c_str(),
 141                               &missing, &nmissing, &def);
 142     if (nmissing) XFreeStringList(missing);
 143     if (_fontset)
 144       _fontset_extents = XExtentsOfFontSet(_fontset);
 145     else
 146       return False;
 147
 148     assert(_fontset_extents);
 149   }
 150
 151   _font = XLoadQueryFont(_display, xlfd.c_str());
 152   if (! _font)
 153     return False;
 154   return True;
 155 }
 156
 157
 158 BFont::~BFont(void) {
 159 #ifdef    XFT
 160   if (_xftfont)
 161     XftFontClose(_display, _xftfont);
 162 #endif // XFT
 163
 164   if (i18n.multibyte() && _fontset)
 165     XFreeFontSet(_display, _fontset);
 166   if (_font)
 167     XFreeFont(_display, _font);
 168 }
 169
 170
 171 /*
 172  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 173  */
 174 string BFont::buildXlfd(void) const {
 175   if (_simplename)
 176     return _family;
 177
 178   string weight = _bold ? "bold" : "medium";
 179   string slant = _italic ? "i" : "r";
 180   string sizestr= _size ? itostring(_size * 10) : "*";
 181
 182   return "-*-" + _family + "-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 183       "-*-*-*-*-*-*";
 184 }
 185
 186
 187 /*
 188  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 189  */
 190 string BFont::buildMultibyteXlfd(void) const {
 191   string weight = _bold ? "bold" : "medium";
 192   string slant = _italic ? "i" : "r";
 193   string sizestr= _size ? itostring(_size) : "*";
 194
 195   return _family + ','
 196     + "-*-*-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 197       "-*-*-*-*-*-*" + ','
 198     + "-*-*-*-*-*-*-*-" + sizestr + "-*-*-*-*-*-*" + ',' +
 199     + "*";
 200 }
 201
 202
 203 /*
 204  * Takes a full X font name and parses it out so we know if we're bold, our
 205  * size, etc.
 206  */
 207 bool BFont::parseXlfd(const string &xlfd) {
 208   if (xlfd.empty() || xlfd[0] != '-') {
 209     _family = xlfd;
 210     _simplename = True;
 211     _bold = False;
 212     _italic = False;
 213     _size = 0;
 214   } else {
 215     _simplename = False;
 216     string weight,
 217            slant,
 218            sizestr;
 219     int i = 0;
 220
 221     string::const_iterator it = xlfd.begin(), end = xlfd.end();
 222     while(1) {
 223       string::const_iterator tmp = it;   // current string.begin()
 224       it = std::find(tmp, end, '-');     // look for comma between tmp and end
 225       if (i == 2) _family = string(tmp, it); // s[tmp:it]
 226       if (i == 3) weight = string(tmp, it);
 227       if (i == 4) slant = string(tmp, it);
 228       if (i == 7 && string(tmp, it) != "*") sizestr = string(tmp, it);
 229       if (sizestr.empty() &&
 230           i == 8 && string(tmp, it) != "*") sizestr = string(tmp, it);
 231       if (it == end || i >= 8)
 232         break;
 233       ++it;
 234       ++i;
 235     }
 236     if (i < 3)  // no name even! can't parse that
 237       return False;
 238     _bold = weight == "bold" || weight == "demibold";
 239     _italic = slant == "i" || slant == "o";
 240     _size = atoi(sizestr.c_str()) / 10;
 241   }
 242
 243   // min/max size restrictions for sanity, but 0 is the font's "default size"
 244   if (_size && _size < 3)
 245     _size = 3;
 246   else if (_size > 97)
 247     _size = 97;
 248
 249   return True;
 250 }
 251
 252
 253 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
 254                        const string &string) const {
 255   assert(_valid);
 256
 257 #ifdef    XFT
 258   if (_xftfont) {
 259     XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
 260                                   _screen->getColormap());
 261     assert(draw);
 262
 263     XftColor c;
 264     c.color.red = color.red() | color.red() << 8;
 265     c.color.green = color.green() | color.green() << 8;
 266     c.color.blue = color.blue() | color.blue() << 8;
 267     c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
 268     c.pixel = color.pixel();
 269
 270     XftDrawStringUtf8(draw, &c, _xftfont, x, _xftfont->ascent + y,
 271                       (XftChar8 *) string.c_str(), string.size());
 272
 273     XftDrawDestroy(draw);
 274     return;
 275   }
 276 #endif // XFT
 277
 278   BGCCache *_cache = color.display()->gcCache();
 279   BGCCacheItem *_item = _cache->find(color, _font, GXcopy, ClipByChildren);
 280
 281   assert(_cache);
 282   assert(_item);
 283
 284   if (i18n.multibyte())
 285     XmbDrawString(_display, d, _fontset, _item->gc(),
 286                   x, y - _fontset_extents->max_ink_extent.y,
 287                   string.c_str(), string.size());
 288   else
 289     XDrawString(_display, d, _item->gc(),
 290                 x, _font->ascent + y,
 291                 string.c_str(), string.size());
 292
 293   _cache->release(_item);
 294 }
 295
 296
 297 unsigned int BFont::measureString(const string &string) const {
 298   assert(_valid);
 299
 300 #ifdef    XFT
 301   if (_xftfont) {
 302     XGlyphInfo info;
 303     XftTextExtentsUtf8(_display, _xftfont, (XftChar8 *) string.c_str(),
 304                        string.size(), &info);
 305     return info.xOff;
 306   }
 307 #endif // XFT
 308
 309   if (i18n.multibyte()) {
 310     XRectangle ink, logical;
 311     XmbTextExtents(_fontset, string.c_str(), string.size(), &ink, &logical);
 312     return logical.width;
 313   } else {
 314     return XTextWidth(_font, string.c_str(), string.size());
 315   }
 316 }
 317
 318
 319 unsigned int BFont::height(void) const {
 320   assert(_valid);
 321
 322 #ifdef    XFT
 323   if (_xftfont)
 324     return _xftfont->height;
 325 #endif // XFT
 326
 327   if (i18n.multibyte())
 328     return _fontset_extents->max_ink_extent.height;
 329   else
 330     return _font->ascent + _font->descent;
 331 }
 332
 333
 334 unsigned int BFont::maxCharWidth(void) const {
 335   assert(_valid);
 336
 337 #ifdef    XFT
 338   if (_xftfont)
 339     return _xftfont->max_advance_width;
 340 #endif // XFT
 341
 342   if (i18n.multibyte())
 343     return _fontset_extents->max_logical_extent.width;
 344   else
 345     return _font->max_bounds.rbearing - _font->min_bounds.lbearing;
 346 }