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 shadow, unsigned char offset,
  52              unsigned char tint, bool antialias) :
  53                                           _display(d),
  54                                           _screen(screen),
  55                                           _family(family),
  56                                           _simplename(False),
  57                                           _size(size),
  58                                           _bold(bold),
  59                                           _italic(italic),
  60                                           _antialias(antialias),
  61                                           _shadow(shadow),
  62                                           _offset(offset),
  63                                           _tint(tint),
  64                                           _xftfont(0),
  65                                           _font(0),
  66                                           _fontset(0),
  67                                           _fontset_extents(0) {
  68   _valid = False;
  69
  70   _xftfont = XftFontOpen(_display, _screen->getScreenNumber(),
  71                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  72                          XFT_SIZE,   XftTypeInteger, _size,
  73                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  74                                                       XFT_WEIGHT_BOLD :
  75                                                       XFT_WEIGHT_MEDIUM),
  76                          XFT_SLANT,  XftTypeInteger, (_italic ?
  77                                                       XFT_SLANT_ITALIC :
  78                                                       XFT_SLANT_ROMAN),
  79                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  80                          0);
  81   if (! _xftfont)
  82     return; // failure
  83
  84   _font = XLoadQueryFont(_display, buildXlfd().c_str());
  85   if (! _font)
  86     return; // failure
  87
  88   _valid = True;
  89 }
  90 #endif
  91
  92
  93 BFont::BFont(Display *d, BScreen *screen, const string &xlfd) :
  94                                        _display(d),
  95                                        _screen(screen),
  96 #ifdef    XFT
  97                                        _antialias(False),
  98                                        _shadow(False),
  99                                        _xftfont(0),
 100 #endif // XFT
 101                                        _font(0),
 102                                        _fontset(0),
 103                                        _fontset_extents(0) {
 104   string int_xlfd;
 105   if (xlfd.empty())
 106     int_xlfd = _fallback_font;
 107   else
 108     int_xlfd = xlfd;
 109
 110   if ((_valid = createXFont(int_xlfd)))
 111     return; // success
 112
 113   if (int_xlfd != _fallback_font) {
 114     // try the fallback
 115     cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 116       "Falling back to default '" << _fallback_font << "'" << endl;
 117
 118     if ((_valid = createXFont(_fallback_font)))
 119       return; // success
 120   }
 121
 122   cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 123     "Giving up!" << endl;
 124   return; // failure
 125 }
 126
 127
 128 bool BFont::createXFont(const std::string &xlfd) {
 129   /*
 130      Even though this is only used for font sets (multibyte), it is still parsed
 131      out so that the bold/italic/etc information is still available from the
 132      class when using non-multibyte.
 133
 134      This is where _simplename, _bold, _italic, and _size are initialized, since
 135      they are not initialized in the constructor. This needs to occur before
 136      calling any Xlfd-building functions.
 137   */
 138   if (! parseXlfd(xlfd))
 139     return False;
 140
 141   if (i18n.multibyte()) {
 142     char **missing, *def = "-";
 143     int nmissing;
 144
 145     _fontset = XCreateFontSet(_display, buildMultibyteXlfd().c_str(),
 146                               &missing, &nmissing, &def);
 147     if (nmissing) XFreeStringList(missing);
 148     if (_fontset)
 149       _fontset_extents = XExtentsOfFontSet(_fontset);
 150     else
 151       return False;
 152
 153     assert(_fontset_extents);
 154   }
 155
 156   _font = XLoadQueryFont(_display, xlfd.c_str());
 157   if (! _font)
 158     return False;
 159   return True;
 160 }
 161
 162
 163 BFont::~BFont(void) {
 164 #ifdef    XFT
 165   if (_xftfont)
 166     XftFontClose(_display, _xftfont);
 167 #endif // XFT
 168
 169   if (i18n.multibyte() && _fontset)
 170     XFreeFontSet(_display, _fontset);
 171   if (_font)
 172     XFreeFont(_display, _font);
 173 }
 174
 175
 176 /*
 177  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 178  */
 179 string BFont::buildXlfd(void) const {
 180   if (_simplename)
 181     return _family;
 182
 183   string weight = _bold ? "bold" : "medium";
 184   string slant = _italic ? "i" : "r";
 185   string sizestr= _size ? itostring(_size * 10) : "*";
 186
 187   return "-*-" + _family + "-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 188       "-*-*-*-*-*-*";
 189 }
 190
 191
 192 /*
 193  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 194  */
 195 string BFont::buildMultibyteXlfd(void) const {
 196   string weight = _bold ? "bold" : "medium";
 197   string slant = _italic ? "i" : "r";
 198   string sizestr= _size ? itostring(_size) : "*";
 199
 200   return _family + ','
 201     + "-*-*-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 202       "-*-*-*-*-*-*" + ','
 203     + "-*-*-*-*-*-*-*-" + sizestr + "-*-*-*-*-*-*" + ',' +
 204     + "*";
 205 }
 206
 207
 208 /*
 209  * Takes a full X font name and parses it out so we know if we're bold, our
 210  * size, etc.
 211  */
 212 bool BFont::parseXlfd(const string &xlfd) {
 213   if (xlfd.empty() || xlfd[0] != '-') {
 214     _family = xlfd;
 215     _simplename = True;
 216     _bold = False;
 217     _italic = False;
 218     _size = 0;
 219   } else {
 220     _simplename = False;
 221     string weight,
 222            slant,
 223            sizestr;
 224     int i = 0;
 225
 226     string::const_iterator it = xlfd.begin(), end = xlfd.end();
 227     while(1) {
 228       string::const_iterator tmp = it;   // current string.begin()
 229       it = std::find(tmp, end, '-');     // look for comma between tmp and end
 230       if (i == 2) _family = string(tmp, it); // s[tmp:it]
 231       if (i == 3) weight = string(tmp, it);
 232       if (i == 4) slant = string(tmp, it);
 233       if (i == 7 && string(tmp, it) != "*") sizestr = string(tmp, it);
 234       if (sizestr.empty() &&
 235           i == 8 && string(tmp, it) != "*") sizestr = string(tmp, it);
 236       if (it == end || i >= 8)
 237         break;
 238       ++it;
 239       ++i;
 240     }
 241     if (i < 3)  // no name even! can't parse that
 242       return False;
 243     _bold = weight == "bold" || weight == "demibold";
 244     _italic = slant == "i" || slant == "o";
 245     _size = atoi(sizestr.c_str()) / 10;
 246   }
 247
 248   // min/max size restrictions for sanity, but 0 is the font's "default size"
 249   if (_size && _size < 3)
 250     _size = 3;
 251   else if (_size > 97)
 252     _size = 97;
 253
 254   return True;
 255 }
 256
 257
 258 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
 259                        const string &string) const {
 260   assert(_valid);
 261
 262 #ifdef    XFT
 263   if (_xftfont) {
 264     XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
 265                                   _screen->getColormap());
 266     assert(draw);
 267
 268     if (_shadow) {
 269       XftColor c;
 270       c.color.red = 0;
 271       c.color.green = 0;
 272       c.color.blue = 0;
 273       c.color.alpha = _tint | _tint << 8; // transparent shadow
 274       c.pixel = BlackPixel(_display, _screen->getScreenNumber());
 275
 276 #ifdef XFT_UTF8
 277       XftDrawStringUtf8(
 278 #else
 279       XftDrawString8(
 280 #endif
 281                      draw, &c, _xftfont, x + _offset,
 282                      _xftfont->ascent + y + _offset, (XftChar8 *) string.c_str(),
 283                      string.size());
 284     }
 285
 286     XftColor c;
 287     c.color.red = color.red() | color.red() << 8;
 288     c.color.green = color.green() | color.green() << 8;
 289     c.color.blue = color.blue() | color.blue() << 8;
 290     c.pixel = color.pixel();
 291     c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
 292
 293 #ifdef XFT_UTF8
 294     XftDrawStringUtf8(
 295 #else
 296     XftDrawString8(
 297 #endif
 298                    draw, &c, _xftfont, x, _xftfont->ascent + y,
 299                    (XftChar8 *) string.c_str(), string.size());
 300
 301     XftDrawDestroy(draw);
 302     return;
 303   }
 304 #endif // XFT
 305
 306   BPen pen(color, _font);
 307
 308   if (i18n.multibyte())
 309     XmbDrawString(_display, d, _fontset, pen.gc(),
 310                   x, y - _fontset_extents->max_ink_extent.y,
 311                   string.c_str(), string.size());
 312   else
 313     XDrawString(_display, d, pen.gc(),
 314                 x, _font->ascent + y,
 315                 string.c_str(), string.size());
 316 }
 317
 318
 319 unsigned int BFont::measureString(const string &string) const {
 320   assert(_valid);
 321
 322 #ifdef    XFT
 323   if (_xftfont) {
 324     XGlyphInfo info;
 325
 326 #ifdef XFT_UTF8
 327     XftTextExtentsUtf8(
 328 #else
 329     XftTextExtents8(
 330 #endif
 331                     _display, _xftfont, (XftChar8 *) string.c_str(),
 332                     string.size(), &info);
 333
 334     return info.xOff + (_shadow ? 1 : 0);
 335   }
 336 #endif // XFT
 337
 338   if (i18n.multibyte()) {
 339     XRectangle ink, logical;
 340     XmbTextExtents(_fontset, string.c_str(), string.size(), &ink, &logical);
 341     return logical.width;
 342   } else {
 343     return XTextWidth(_font, string.c_str(), string.size());
 344   }
 345 }
 346
 347
 348 unsigned int BFont::height(void) const {
 349   assert(_valid);
 350
 351 #ifdef    XFT
 352   if (_xftfont)
 353     return _xftfont->height + (_shadow ? 1 : 0);
 354 #endif // XFT
 355
 356   if (i18n.multibyte())
 357     return _fontset_extents->max_ink_extent.height;
 358   else
 359     return _font->ascent + _font->descent;
 360 }
 361
 362
 363 unsigned int BFont::maxCharWidth(void) const {
 364   assert(_valid);
 365
 366 #ifdef    XFT
 367   if (_xftfont)
 368     return _xftfont->max_advance_width;
 369 #endif // XFT
 370
 371   if (i18n.multibyte())
 372     return _fontset_extents->max_logical_extent.width;
 373   else
 374     return _font->max_bounds.rbearing - _font->min_bounds.lbearing;
 375 }