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 "font.hh"
  42 #include "util.hh"
  43 #include "gccache.hh"
  44 #include "color.hh"
  45
  46 string      BFont::_fallback_font   = "fixed";
  47
  48 #ifdef XFT
  49 BFont::BFont(Display *d, BScreen *screen, const string &family, int size,
  50              bool bold, bool italic, bool shadow, unsigned char offset,
  51              unsigned char tint, 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                                           _shadow(shadow),
  61                                           _offset(offset),
  62                                           _tint(tint),
  63                                           _xftfont(0),
  64                                           _font(0),
  65                                           _fontset(0),
  66                                           _fontset_extents(0) {
  67   _valid = False;
  68
  69   _xftfont = XftFontOpen(_display, _screen->getScreenNumber(),
  70                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  71                          XFT_SIZE,   XftTypeInteger, _size,
  72                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  73                                                       XFT_WEIGHT_BOLD :
  74                                                       XFT_WEIGHT_MEDIUM),
  75                          XFT_SLANT,  XftTypeInteger, (_italic ?
  76                                                       XFT_SLANT_ITALIC :
  77                                                       XFT_SLANT_ROMAN),
  78                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  79                          0);
  80   if (! _xftfont)
  81     return; // failure
  82
  83   _font = XLoadQueryFont(_display, buildXlfd().c_str());
  84   if (! _font)
  85     return; // failure
  86
  87   _valid = True;
  88 }
  89 #endif
  90
  91
  92 BFont::BFont(Display *d, BScreen *screen, const string &xlfd) :
  93                                        _display(d),
  94                                        _screen(screen),
  95 #ifdef    XFT
  96                                        _antialias(False),
  97                                        _shadow(False),
  98                                        _xftfont(0),
  99 #endif // XFT
 100                                        _font(0),
 101                                        _fontset(0),
 102                                        _fontset_extents(0) {
 103   string int_xlfd;
 104   if (xlfd.empty())
 105     int_xlfd = _fallback_font;
 106   else
 107     int_xlfd = xlfd;
 108
 109   if ((_valid = createXFont(int_xlfd)))
 110     return; // success
 111
 112   if (int_xlfd != _fallback_font) {
 113     // try the fallback
 114     cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 115       "Falling back to default '" << _fallback_font << "'" << endl;
 116
 117     if ((_valid = createXFont(_fallback_font)))
 118       return; // success
 119   }
 120
 121   cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 122     "Giving up!" << endl;
 123   return; // failure
 124 }
 125
 126
 127 bool BFont::createXFont(const std::string &xlfd) {
 128   /*
 129      Even though this is only used for font sets (multibyte), it is still parsed
 130      out so that the bold/italic/etc information is still available from the
 131      class when using non-multibyte.
 132
 133      This is where _simplename, _bold, _italic, and _size are initialized, since
 134      they are not initialized in the constructor. This needs to occur before
 135      calling any Xlfd-building functions.
 136   */
 137   if (! parseXlfd(xlfd))
 138     return False;
 139
 140   if (i18n.multibyte()) {
 141     char **missing, *def = "-";
 142     int nmissing;
 143
 144     _fontset = XCreateFontSet(_display, buildMultibyteXlfd().c_str(),
 145                               &missing, &nmissing, &def);
 146     if (nmissing) XFreeStringList(missing);
 147     if (_fontset)
 148       _fontset_extents = XExtentsOfFontSet(_fontset);
 149     else
 150       return False;
 151
 152     assert(_fontset_extents);
 153   }
 154
 155   _font = XLoadQueryFont(_display, xlfd.c_str());
 156   if (! _font)
 157     return False;
 158   return True;
 159 }
 160
 161
 162 BFont::~BFont(void) {
 163 #ifdef    XFT
 164   if (_xftfont)
 165     XftFontClose(_display, _xftfont);
 166 #endif // XFT
 167
 168   if (i18n.multibyte() && _fontset)
 169     XFreeFontSet(_display, _fontset);
 170   if (_font)
 171     XFreeFont(_display, _font);
 172 }
 173
 174
 175 /*
 176  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 177  */
 178 string BFont::buildXlfd(void) const {
 179   if (_simplename)
 180     return _family;
 181
 182   string weight = _bold ? "bold" : "medium";
 183   string slant = _italic ? "i" : "r";
 184   string sizestr= _size ? itostring(_size * 10) : "*";
 185
 186   return "-*-" + _family + "-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 187       "-*-*-*-*-*-*";
 188 }
 189
 190
 191 /*
 192  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 193  */
 194 string BFont::buildMultibyteXlfd(void) const {
 195   string weight = _bold ? "bold" : "medium";
 196   string slant = _italic ? "i" : "r";
 197   string sizestr= _size ? itostring(_size) : "*";
 198
 199   return _family + ','
 200     + "-*-*-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 201       "-*-*-*-*-*-*" + ','
 202     + "-*-*-*-*-*-*-*-" + sizestr + "-*-*-*-*-*-*" + ',' +
 203     + "*";
 204 }
 205
 206
 207 /*
 208  * Takes a full X font name and parses it out so we know if we're bold, our
 209  * size, etc.
 210  */
 211 bool BFont::parseXlfd(const string &xlfd) {
 212   if (xlfd.empty() || xlfd[0] != '-') {
 213     _family = xlfd;
 214     _simplename = True;
 215     _bold = False;
 216     _italic = False;
 217     _size = 0;
 218   } else {
 219     _simplename = False;
 220     string weight,
 221            slant,
 222            sizestr;
 223     int i = 0;
 224
 225     string::const_iterator it = xlfd.begin(), end = xlfd.end();
 226     while(1) {
 227       string::const_iterator tmp = it;   // current string.begin()
 228       it = std::find(tmp, end, '-');     // look for comma between tmp and end
 229       if (i == 2) _family = string(tmp, it); // s[tmp:it]
 230       if (i == 3) weight = string(tmp, it);
 231       if (i == 4) slant = string(tmp, it);
 232       if (i == 7 && string(tmp, it) != "*") sizestr = string(tmp, it);
 233       if (sizestr.empty() &&
 234           i == 8 && string(tmp, it) != "*") sizestr = string(tmp, it);
 235       if (it == end || i >= 8)
 236         break;
 237       ++it;
 238       ++i;
 239     }
 240     if (i < 3)  // no name even! can't parse that
 241       return False;
 242     _bold = weight == "bold" || weight == "demibold";
 243     _italic = slant == "i" || slant == "o";
 244     _size = atoi(sizestr.c_str()) / 10;
 245   }
 246
 247   // min/max size restrictions for sanity, but 0 is the font's "default size"
 248   if (_size && _size < 3)
 249     _size = 3;
 250   else if (_size > 97)
 251     _size = 97;
 252
 253   return True;
 254 }
 255
 256
 257 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
 258                        const string &string) const {
 259   assert(_valid);
 260
 261 #ifdef    XFT
 262   if (_xftfont) {
 263     XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
 264                                   _screen->getColormap());
 265     assert(draw);
 266
 267     if (_shadow) {
 268       XftColor c;
 269       c.color.red = 0;
 270       c.color.green = 0;
 271       c.color.blue = 0;
 272       c.color.alpha = _tint | _tint << 8; // transparent shadow
 273       c.pixel = BlackPixel(_display, _screen->getScreenNumber());
 274
 275 #ifdef XFT_UTF8
 276       XftDrawStringUtf8(
 277 #else
 278       XftDrawString8(
 279 #endif
 280                      draw, &c, _xftfont, x + _offset,
 281                      _xftfont->ascent + y + _offset, (XftChar8 *) string.c_str(),
 282                      string.size());
 283     }
 284
 285     XftColor c;
 286     c.color.red = color.red() | color.red() << 8;
 287     c.color.green = color.green() | color.green() << 8;
 288     c.color.blue = color.blue() | color.blue() << 8;
 289     c.pixel = color.pixel();
 290     c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
 291
 292 #ifdef XFT_UTF8
 293     XftDrawStringUtf8(
 294 #else
 295     XftDrawString8(
 296 #endif
 297                    draw, &c, _xftfont, x, _xftfont->ascent + y,
 298                    (XftChar8 *) string.c_str(), string.size());
 299
 300     XftDrawDestroy(draw);
 301     return;
 302   }
 303 #endif // XFT
 304
 305   BPen pen(color, _font);
 306
 307   if (i18n.multibyte())
 308     XmbDrawString(_display, d, _fontset, pen.gc(),
 309                   x, y - _fontset_extents->max_ink_extent.y,
 310                   string.c_str(), string.size());
 311   else
 312     XDrawString(_display, d, pen.gc(),
 313                 x, _font->ascent + y,
 314                 string.c_str(), string.size());
 315 }
 316
 317
 318 unsigned int BFont::measureString(const string &string) const {
 319   assert(_valid);
 320
 321 #ifdef    XFT
 322   if (_xftfont) {
 323     XGlyphInfo info;
 324
 325 #ifdef XFT_UTF8
 326     XftTextExtentsUtf8(
 327 #else
 328     XftTextExtents8(
 329 #endif
 330                     _display, _xftfont, (XftChar8 *) string.c_str(),
 331                     string.size(), &info);
 332
 333     return info.xOff + (_shadow ? _offset : 0);
 334   }
 335 #endif // XFT
 336
 337   if (i18n.multibyte()) {
 338     XRectangle ink, logical;
 339     XmbTextExtents(_fontset, string.c_str(), string.size(), &ink, &logical);
 340     return logical.width;
 341   } else {
 342     return XTextWidth(_font, string.c_str(), string.size());
 343   }
 344 }
 345
 346
 347 unsigned int BFont::height(void) const {
 348   assert(_valid);
 349
 350 #ifdef    XFT
 351   if (_xftfont)
 352     return _xftfont->height + (_shadow ? _offset : 0);
 353 #endif // XFT
 354
 355   if (i18n.multibyte())
 356     return _fontset_extents->max_ink_extent.height;
 357   else
 358     return _font->ascent + _font->descent;
 359 }
 360
 361
 362 unsigned int BFont::maxCharWidth(void) const {
 363   assert(_valid);
 364
 365 #ifdef    XFT
 366   if (_xftfont)
 367     return _xftfont->max_advance_width;
 368 #endif // XFT
 369
 370   if (i18n.multibyte())
 371     return _fontset_extents->max_logical_extent.width;
 372   else
 373     return _font->max_bounds.rbearing - _font->min_bounds.lbearing;
 374 }