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