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, 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                                           _xftfont(0),
  62                                           _font(0),
  63                                           _fontset(0),
  64                                           _fontset_extents(0) {
  65   _valid = False;
  66
  67   _xftfont = XftFontOpen(_display, _screen->getScreenNumber(),
  68                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  69                          XFT_SIZE,   XftTypeInteger, _size,
  70                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  71                                                       XFT_WEIGHT_BOLD :
  72                                                       XFT_WEIGHT_MEDIUM),
  73                          XFT_SLANT,  XftTypeInteger, (_italic ?
  74                                                       XFT_SLANT_ITALIC :
  75                                                       XFT_SLANT_ROMAN),
  76                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  77                          0);
  78   if (! _xftfont)
  79     return; // failure
  80
  81   _font = XLoadQueryFont(_display, buildXlfd().c_str());
  82   if (! _font)
  83     return; // failure
  84
  85   _valid = True;
  86 }
  87 #endif
  88
  89
  90 BFont::BFont(Display *d, BScreen *screen, const string &xlfd) :
  91                                        _display(d),
  92                                        _screen(screen),
  93 #ifdef    XFT
  94                                        _antialias(False),
  95                                        _shadow(False),
  96                                        _xftfont(0),
  97 #endif // XFT
  98                                        _font(0),
  99                                        _fontset(0),
 100                                        _fontset_extents(0) {
 101   string int_xlfd;
 102   if (xlfd.empty())
 103     int_xlfd = _fallback_font;
 104   else
 105     int_xlfd = xlfd;
 106
 107   if ((_valid = createXFont(int_xlfd)))
 108     return; // success
 109
 110   if (int_xlfd != _fallback_font) {
 111     // try the fallback
 112     cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 113       "Falling back to default '" << _fallback_font << "'" << endl;
 114
 115     if ((_valid = createXFont(_fallback_font)))
 116       return; // success
 117   }
 118
 119   cerr << "BFont::BFont(): couldn't load font '" << _family << "'" << endl <<
 120     "Giving up!" << endl;
 121   return; // failure
 122 }
 123
 124
 125 bool BFont::createXFont(const std::string &xlfd) {
 126   /*
 127      Even though this is only used for font sets (multibyte), it is still parsed
 128      out so that the bold/italic/etc information is still available from the
 129      class when using non-multibyte.
 130
 131      This is where _simplename, _bold, _italic, and _size are initialized, since
 132      they are not initialized in the constructor. This needs to occur before
 133      calling any Xlfd-building functions.
 134   */
 135   if (! parseXlfd(xlfd))
 136     return False;
 137
 138   if (i18n.multibyte()) {
 139     char **missing, *def = "-";
 140     int nmissing;
 141
 142     _fontset = XCreateFontSet(_display, buildMultibyteXlfd().c_str(),
 143                               &missing, &nmissing, &def);
 144     if (nmissing) XFreeStringList(missing);
 145     if (_fontset)
 146       _fontset_extents = XExtentsOfFontSet(_fontset);
 147     else
 148       return False;
 149
 150     assert(_fontset_extents);
 151   }
 152
 153   _font = XLoadQueryFont(_display, xlfd.c_str());
 154   if (! _font)
 155     return False;
 156   return True;
 157 }
 158
 159
 160 BFont::~BFont(void) {
 161 #ifdef    XFT
 162   if (_xftfont)
 163     XftFontClose(_display, _xftfont);
 164 #endif // XFT
 165
 166   if (i18n.multibyte() && _fontset)
 167     XFreeFontSet(_display, _fontset);
 168   if (_font)
 169     XFreeFont(_display, _font);
 170 }
 171
 172
 173 /*
 174  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 175  */
 176 string BFont::buildXlfd(void) const {
 177   if (_simplename)
 178     return _family;
 179
 180   string weight = _bold ? "bold" : "medium";
 181   string slant = _italic ? "i" : "r";
 182   string sizestr= _size ? itostring(_size * 10) : "*";
 183
 184   return "-*-" + _family + "-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 185       "-*-*-*-*-*-*";
 186 }
 187
 188
 189 /*
 190  * Takes _family, _size, _bold, _italic, etc and builds them into a full XLFD.
 191  */
 192 string BFont::buildMultibyteXlfd(void) const {
 193   string weight = _bold ? "bold" : "medium";
 194   string slant = _italic ? "i" : "r";
 195   string sizestr= _size ? itostring(_size) : "*";
 196
 197   return _family + ','
 198     + "-*-*-" + weight + "-" + slant + "-*-*-*-" + sizestr +
 199       "-*-*-*-*-*-*" + ','
 200     + "-*-*-*-*-*-*-*-" + sizestr + "-*-*-*-*-*-*" + ',' +
 201     + "*";
 202 }
 203
 204
 205 /*
 206  * Takes a full X font name and parses it out so we know if we're bold, our
 207  * size, etc.
 208  */
 209 bool BFont::parseXlfd(const string &xlfd) {
 210   if (xlfd.empty() || xlfd[0] != '-') {
 211     _family = xlfd;
 212     _simplename = True;
 213     _bold = False;
 214     _italic = False;
 215     _size = 0;
 216   } else {
 217     _simplename = False;
 218     string weight,
 219            slant,
 220            sizestr;
 221     int i = 0;
 222
 223     string::const_iterator it = xlfd.begin(), end = xlfd.end();
 224     while(1) {
 225       string::const_iterator tmp = it;   // current string.begin()
 226       it = std::find(tmp, end, '-');     // look for comma between tmp and end
 227       if (i == 2) _family = string(tmp, it); // s[tmp:it]
 228       if (i == 3) weight = string(tmp, it);
 229       if (i == 4) slant = string(tmp, it);
 230       if (i == 7 && string(tmp, it) != "*") sizestr = string(tmp, it);
 231       if (sizestr.empty() &&
 232           i == 8 && string(tmp, it) != "*") sizestr = string(tmp, it);
 233       if (it == end || i >= 8)
 234         break;
 235       ++it;
 236       ++i;
 237     }
 238     if (i < 3)  // no name even! can't parse that
 239       return False;
 240     _bold = weight == "bold" || weight == "demibold";
 241     _italic = slant == "i" || slant == "o";
 242     _size = atoi(sizestr.c_str()) / 10;
 243   }
 244
 245   // min/max size restrictions for sanity, but 0 is the font's "default size"
 246   if (_size && _size < 3)
 247     _size = 3;
 248   else if (_size > 97)
 249     _size = 97;
 250
 251   return True;
 252 }
 253
 254
 255 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
 256                        const string &string) const {
 257   assert(_valid);
 258
 259 #ifdef    XFT
 260   if (_xftfont) {
 261     XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
 262                                   _screen->getColormap());
 263     assert(draw);
 264
 265     if (_shadow) {
 266       XftColor c;
 267       c.color.red = 0;
 268       c.color.green = 0;
 269       c.color.blue = 0;
 270       c.color.alpha = 0x40 | 0x40 << 8; // transparent shadow
 271       c.pixel = BlackPixel(_display, _screen->getScreenNumber());
 272
 273 #ifdef XFT_UTF8
 274       XftDrawStringUtf8(
 275 #else
 276       XftDrawString8(
 277 #endif
 278                      draw, &c, _xftfont, x + 1, _xftfont->ascent + y + 1,
 279                      (XftChar8 *) string.c_str(), string.size());
 280     }
 281
 282     XftColor c;
 283     c.color.red = color.red() | color.red() << 8;
 284     c.color.green = color.green() | color.green() << 8;
 285     c.color.blue = color.blue() | color.blue() << 8;
 286     c.pixel = color.pixel();
 287     c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
 288
 289 #ifdef XFT_UTF8
 290     XftDrawStringUtf8(
 291 #else
 292     XftDrawString8(
 293 #endif
 294                    draw, &c, _xftfont, x, _xftfont->ascent + y,
 295                    (XftChar8 *) string.c_str(), string.size());
 296
 297     XftDrawDestroy(draw);
 298     return;
 299   }
 300 #endif // XFT
 301
 302   BPen pen(color, _font);
 303
 304   if (i18n.multibyte())
 305     XmbDrawString(_display, d, _fontset, pen.gc(),
 306                   x, y - _fontset_extents->max_ink_extent.y,
 307                   string.c_str(), string.size());
 308   else
 309     XDrawString(_display, d, pen.gc(),
 310                 x, _font->ascent + y,
 311                 string.c_str(), string.size());
 312 }
 313
 314
 315 unsigned int BFont::measureString(const string &string) const {
 316   assert(_valid);
 317
 318 #ifdef    XFT
 319   if (_xftfont) {
 320     XGlyphInfo info;
 321
 322 #ifdef XFT_UTF8
 323     XftTextExtentsUtf8(
 324 #else
 325     XftTextExtents8(
 326 #endif
 327                     _display, _xftfont, (XftChar8 *) string.c_str(),
 328                     string.size(), &info);
 329
 330     return info.xOff + (_shadow ? 1 : 0);
 331   }
 332 #endif // XFT
 333
 334   if (i18n.multibyte()) {
 335     XRectangle ink, logical;
 336     XmbTextExtents(_fontset, string.c_str(), string.size(), &ink, &logical);
 337     return logical.width;
 338   } else {
 339     return XTextWidth(_font, string.c_str(), string.size());
 340   }
 341 }
 342
 343
 344 unsigned int BFont::height(void) const {
 345   assert(_valid);
 346
 347 #ifdef    XFT
 348   if (_xftfont)
 349     return _xftfont->height + (_shadow ? 1 : 0);
 350 #endif // XFT
 351
 352   if (i18n.multibyte())
 353     return _fontset_extents->max_ink_extent.height;
 354   else
 355     return _font->ascent + _font->descent;
 356 }
 357
 358
 359 unsigned int BFont::maxCharWidth(void) const {
 360   assert(_valid);
 361
 362 #ifdef    XFT
 363   if (_xftfont)
 364     return _xftfont->max_advance_width;
 365 #endif // XFT
 366
 367   if (i18n.multibyte())
 368     return _fontset_extents->max_logical_extent.width;
 369   else
 370     return _font->max_bounds.rbearing - _font->min_bounds.lbearing;
 371 }