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 //bool        BFont::_antialias       = False;
  48 string      BFont::_fallback_font   = "fixed";
  49
  50
  51 BFont::BFont(Display *d, BScreen *screen, const string &family, int size,
  52              bool bold, bool italic) : _display(d),
  53                                        _screen(screen),
  54                                        _name(family),
  55                                        _simplename(False),
  56                                        _size(size * 10),
  57                                        _bold(bold),
  58                                        _italic(italic),
  59 #ifdef    XFT
  60                                        _xftfont(0),
  61 #endif // XFT
  62                                        _font(0),
  63                                        _fontset(0),
  64                                        _fontset_extents(0),
  65                                        _cache(0),
  66                                        _item(0) {
  67   _valid = init();
  68 }
  69
  70
  71 BFont::BFont(Display *d, BScreen *screen, const string &xlfd) :
  72                                        _display(d),
  73                                        _screen(screen),
  74 #ifdef    XFT
  75                                        _xftfont(0),
  76 #endif // XFT
  77                                        _font(0),
  78                                        _fontset(0),
  79                                        _fontset_extents(0),
  80                                        _cache(0),
  81                                        _item(0) {
  82   string int_xlfd;
  83   if (xlfd.empty())
  84     int_xlfd = _fallback_font;
  85   else
  86     int_xlfd = xlfd;
  87
  88   _valid = init(xlfd);
  89 }
  90
  91
  92 bool BFont::init(const string &xlfd) {
  93   // try load the specified font
  94   if (xlfd.empty() || parseFontString(xlfd))
  95     if (createFont())
  96       return True;
  97
  98   if (xlfd != _fallback_font) {
  99     // try the fallback
 100     cerr << "BFont::BFont(): couldn't load font '" << _name << "'" << endl <<
 101       "Falling back to default '" << _fallback_font << "'" << endl;
 102   if (parseFontString(_fallback_font))
 103     if (createFont())
 104       return True;
 105   }
 106
 107   cerr << "BFont::BFont(): couldn't load font '" << _name << "'" << endl <<
 108     "Giving up!" << endl;
 109
 110   return False;
 111 }
 112
 113
 114 bool BFont::createFont(void) {
 115   std::string fullname;
 116
 117 #ifdef    XFT
 118   fullname = buildXlfdName(False);
 119   _xftfont = XftFontOpenXlfd(_display, _screen->getScreenNumber(),
 120                              fullname.c_str());
 121   if (_xftfont)
 122     return True;
 123
 124   cerr << "BFont::BFont(): couldn't load font '" << _name << "'" << endl <<
 125     "as an Xft font, trying as a standard X font." << endl;
 126 #endif
 127
 128   if (i18n.multibyte()) {
 129     char **missing, *def = "-";
 130     int nmissing;
 131
 132     fullname = buildXlfdName(True);
 133     _fontset = XCreateFontSet(_display, fullname.c_str(), &missing, &nmissing,
 134                               &def);
 135     if (nmissing) XFreeStringList(missing);
 136     if (_fontset)
 137       _fontset_extents = XExtentsOfFontSet(_fontset);
 138     else
 139       return False;
 140
 141     assert(_fontset_extents);
 142   }
 143
 144   fullname = buildXlfdName(False);
 145   cerr << "loading font '" << fullname.c_str() << "'\n";
 146   _font = XLoadQueryFont(_display, fullname.c_str());
 147   if (! _font)
 148     return False;
 149   return True;
 150 }
 151
 152
 153 BFont::~BFont() {
 154 #ifdef    XFT
 155   if (_xftfont)
 156     XftFontClose(_display, _xftfont);
 157 #endif // XFT
 158
 159   if (i18n.multibyte() && _fontset)
 160     XFreeFontSet(_display, _fontset);
 161   if (_font)
 162     XFreeFont(_display, _font);
 163
 164   if (_item)
 165     _cache->release(_item);
 166 }
 167
 168
 169 /*
 170  * Takes _name, _size, _bold, _italic, etc and builds them into a full XLFD.
 171  */
 172 string BFont::buildXlfdName(bool mb) const {
 173   string weight = _bold ? "bold" : "medium";
 174   string slant = _italic ? "i" : "r";
 175   string sizestr= _size ? itostring(_size) : "*";
 176
 177   if (mb)
 178     return _name + ',' +
 179            "-*-*-" + weight + "-" + slant + "-*-*-" + sizestr +
 180              "-*-*-*-*-*-*-*" + ',' +
 181            "-*-*-*-*-*-*-" + sizestr + "-*-*-*-*-*-*-*" + ',' +
 182            "*";
 183   else if (_simplename)
 184     return _name;
 185   else
 186     return "-*-" + _name + "-" + weight + "-" + slant + "-*-*-*-" +
 187            sizestr + "-*-*-*-*-*-*";
 188 }
 189
 190
 191 /*
 192  * Takes a full X font name and parses it out so we know if we're bold, our
 193  * size, etc.
 194  */
 195 bool BFont::parseFontString(const string &xlfd) {
 196   if (xlfd.empty() || xlfd[0] != '-') {
 197     _name = xlfd;
 198     _simplename = True;
 199     _bold = False;
 200     _italic = False;
 201     _size = 0;
 202   } else {
 203     _simplename = False;
 204     string weight,
 205            slant,
 206            sizestr;
 207     int i = 0;
 208
 209     string::const_iterator it = xlfd.begin(), end = xlfd.end();
 210     while(1) {
 211       string::const_iterator tmp = it;   // current string.begin()
 212       it = std::find(tmp, end, '-');     // look for comma between tmp and end
 213       if (i == 2) _name = string(tmp, it); // s[tmp:it]
 214       if (i == 3) weight = string(tmp, it);
 215       if (i == 4) slant = string(tmp, it);
 216       if (i == 8) sizestr = string(tmp, it);
 217       if (it == end || i >= 8)
 218         break;
 219       ++it;
 220       ++i;
 221     }
 222     if (i < 3)  // no name even! can't parse that
 223       return False;
 224     _bold = weight == "bold" || weight == "demibold";
 225     _italic = slant == "i" || slant == "o";
 226     if (atoi(sizestr.c_str()))
 227       _size = atoi(sizestr.c_str());
 228   }
 229
 230   // min/max size restrictions for sanity, but 0 is the font's "default size"
 231   if (_size && _size < 30)
 232     _size = 30;
 233   else if (_size > 970)
 234     _size = 970;
 235
 236   return True;
 237 }
 238
 239
 240 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
 241                        const string &string) const {
 242   assert(_valid);
 243
 244 #ifdef    XFT
 245   if (_xftfont) {
 246     XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
 247                                   _screen->getColormap());
 248     assert(draw);
 249
 250     XftColor c;
 251     c.color.red = color.red() | color.red() << 8;
 252     c.color.green = color.green() | color.green() << 8;
 253     c.color.blue = color.blue() | color.blue() << 8;
 254     c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
 255     c.pixel = color.pixel();
 256
 257     XftDrawStringUtf8(draw, &c, _xftfont, x, _xftfont->ascent + y,
 258                       (XftChar8 *) string.c_str(), string.size());
 259
 260     XftDrawDestroy(draw);
 261     return;
 262   }
 263 #endif // XFT
 264
 265   if (! _cache)
 266     _cache = color.display()->gcCache();
 267   if (! _item)
 268     _item = _cache->find(color, _font, GXcopy, ClipByChildren);
 269
 270   assert(_cache);
 271   assert(_item);
 272
 273   if (i18n.multibyte())
 274     XmbDrawString(_display, d, _fontset, _item->gc(),
 275                   x, y - _fontset_extents->max_ink_extent.y,
 276                   string.c_str(), string.size());
 277   else
 278     XDrawString(_display, d, _item->gc(),
 279                 x, _font->ascent + y,
 280                 string.c_str(), string.size());
 281 }
 282
 283
 284 unsigned int BFont::measureString(const string &string) const {
 285   assert(_valid);
 286
 287 #ifdef    XFT
 288   if (_xftfont) {
 289     XGlyphInfo info;
 290     XftTextExtentsUtf8(_display, _xftfont, (XftChar8 *) string.c_str(),
 291                        string.size(), &info);
 292     return info.xOff;
 293   }
 294 #endif // XFT
 295
 296   if (i18n.multibyte()) {
 297     XRectangle ink, logical;
 298     XmbTextExtents(_fontset, string.c_str(), string.size(), &ink, &logical);
 299     return logical.width;
 300   } else {
 301     return XTextWidth(_font, string.c_str(), string.size());
 302   }
 303 }
 304
 305
 306 unsigned int BFont::height(void) const {
 307   assert(_valid);
 308
 309 #ifdef    XFT
 310   if (_xftfont)
 311     return _xftfont->height;
 312 #endif // XFT
 313
 314   if (i18n.multibyte())
 315     return _fontset_extents->max_ink_extent.height;
 316   else
 317     return _font->ascent + _font->descent;
 318 }
 319
 320
 321 unsigned int BFont::maxCharWidth(void) const {
 322   assert(_valid);
 323
 324 #ifdef    XFT
 325   if (_xftfont)
 326     return _xftfont->max_advance_width;
 327 #endif // XFT
 328
 329   if (i18n.multibyte())
 330     return _fontset_extents->max_logical_extent.width;
 331   else
 332     return _font->max_bounds.rbearing - _font->min_bounds.lbearing;
 333 }