src/FontList.cpp

   1 /**
   2  * \file FontList.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Asger Alstrup
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  * \author Angus Leeming
  10  * \author John Levon
  11  * \author André Pönitz
  12  * \author Dekel Tsur
  13  * \author Jürgen Vigna
  14  * \author Abdelrazak Younes
  15  *
  16  * Full author contact details are available in file CREDITS.
  17  */
  18
  19 #include <config.h>
  20
  21 #include "FontList.h"
  22
  23 #include <boost/next_prior.hpp>
  24
  25 #include <algorithm>
  26
  27 using namespace std;
  28
  29 namespace lyx {
  30
  31
  32 FontList::iterator FontList::fontIterator(pos_type pos)
  33 {
  34         FontList::iterator it = list_.begin();
  35         FontList::iterator end = list_.end();
  36         for (; it != end; ++it) {
  37                 if (it->pos() >= pos)
  38                         break;
  39         }
  40         return it;
  41 }
  42
  43
  44 FontList::const_iterator FontList::fontIterator(pos_type pos) const
  45 {
  46         FontList::const_iterator it = list_.begin();
  47         FontList::const_iterator end = list_.end();
  48         for (; it != end; ++it) {
  49                 if (it->pos() >= pos)
  50                         break;
  51         }
  52         return it;
  53 }
  54
  55
  56 Font & FontList::get(pos_type pos)
  57 {
  58         iterator end = list_.end();
  59         iterator it = fontIterator(pos);
  60         if (it != end && it->pos() == pos)
  61                 return it->font_;
  62         static Font dummy;
  63         return dummy;
  64 }
  65
  66
  67 void FontList::erase(pos_type pos)
  68 {
  69         // Erase entries in the tables.
  70         iterator it = fontIterator(pos);
  71         iterator beg = list_.begin();
  72         if (it != list_.end() && it->pos() == pos
  73                 && (pos == 0
  74                         || (it != list_.begin() && boost::prior(it)->pos() == pos - 1))) {
  75
  76                 // If it is a multi-character font
  77                 // entry, we just make it smaller
  78                 // (see update below), otherwise we
  79                 // should delete it.
  80                 unsigned int const i = it - list_.begin();
  81                 list_.erase(it);
  82                 if (i >= list_.size())
  83                         return;
  84                 it = list_.begin() + i;
  85                 if (i > 0 && i < list_.size() &&
  86                     list_[i - 1].font() == list_[i].font()) {
  87                         list_.erase(beg + i - 1);
  88                         it = list_.begin() + i - 1;
  89                 }
  90         }
  91
  92         // Update all other entries
  93         iterator end = list_.end();
  94         for (; it != end; ++it)
  95                 it->pos(it->pos() - 1);
  96 }
  97
  98 void FontList::increasePosAfterPos(pos_type pos)
  99 {
 100         List::iterator end = list_.end();
 101         List::iterator it = fontIterator(pos);
 102         for (; it != end; ++it)
 103                 ++it->pos_;
 104 }
 105
 106
 107 void FontList::decreasePosAfterPos(pos_type pos)
 108 {
 109         List::iterator end = list_.end();
 110         List::iterator it = fontIterator(pos);
 111         for (; it != end; ++it)
 112                 --it->pos_;
 113 }
 114
 115
 116 void FontList::setRange(pos_type startpos, pos_type endpos, Font const & font)
 117 {
 118         // FIXME: Optimize!!!
 119         for (pos_type pos = startpos; pos != endpos; ++pos)
 120                 set(pos, font);
 121 }
 122
 123
 124 void FontList::set(pos_type pos, Font const & font)
 125 {
 126         // No need to simplify this because it will disappear
 127         // in a new kernel. (Asger)
 128         // Next search font table
 129
 130         List::iterator it = fontIterator(pos);
 131         bool const found = it != list_.end();
 132         if (found && it->font() == font)
 133                 // Font is already set.
 134                 return;
 135
 136         size_t const i = distance(list_.begin(), it);
 137
 138         // Is position pos a beginning of a font block?
 139         bool const begin = pos == 0 || !found
 140                 || (i > 0 && list_[i - 1].pos() == pos - 1);
 141
 142         // Is position pos at the end of a font block?
 143         bool const end = found && list_[i].pos() == pos;
 144
 145         if (!begin && !end) {
 146                 // The general case: The block is splitted into 3 blocks
 147                 list_.insert(list_.begin() + i,
 148                                 FontTable(pos - 1, list_[i].font()));
 149                 list_.insert(list_.begin() + i + 1,
 150                                 FontTable(pos, font));
 151                 return;
 152         }
 153
 154         if (begin && end) {
 155                 // A single char block
 156                 if (i + 1 < list_.size() &&
 157                     list_[i + 1].font() == font) {
 158                         // Merge the singleton block with the next block
 159                         list_.erase(list_.begin() + i);
 160                         if (i > 0 && list_[i - 1].font() == font)
 161                                 list_.erase(list_.begin() + i - 1);
 162                 } else if (i > 0 && list_[i - 1].font() == font) {
 163                         // Merge the singleton block with the previous block
 164                         list_[i - 1].pos(pos);
 165                         list_.erase(list_.begin() + i);
 166                 } else
 167                         list_[i].font(font);
 168         } else if (begin) {
 169                 if (i > 0 && list_[i - 1].font() == font)
 170                         list_[i - 1].pos(pos);
 171                 else
 172                         list_.insert(list_.begin() + i,
 173                                         FontTable(pos, font));
 174         } else if (end) {
 175                 list_[i].pos(pos - 1);
 176                 if (!(i + 1 < list_.size() &&
 177                       list_[i + 1].font() == font))
 178                         list_.insert(list_.begin() + i + 1,
 179                                         FontTable(pos, font));
 180         }
 181 }
 182
 183
 184 void FontList::setMisspelled(pos_type startpos, pos_type endpos,
 185         bool misspelled)
 186 {
 187         List::iterator start = fontIterator(startpos);
 188         if (misspelled && start->font().isMisspelled())
 189                 return;
 190         if (!misspelled && !start->font().isMisspelled())
 191                 return;
 192
 193         Font f = start->font();
 194         f.setMisspelled(misspelled);
 195         setRange(startpos, endpos, f);
 196 }
 197
 198
 199 FontSize FontList::highestInRange(pos_type startpos, pos_type endpos,
 200         FontSize def_size) const
 201 {
 202         if (list_.empty())
 203                 return def_size;
 204
 205         List::const_iterator end_it = fontIterator(endpos);
 206         const_iterator const end = list_.end();
 207         if (end_it != end)
 208                 ++end_it;
 209
 210         List::const_iterator cit = fontIterator(startpos);
 211
 212         FontSize maxsize = FONT_SIZE_TINY;
 213         for (; cit != end_it; ++cit) {
 214                 FontSize size = cit->font().fontInfo().size();
 215                 if (size == FONT_SIZE_INHERIT)
 216                         size = def_size;
 217                 if (size > maxsize && size <= FONT_SIZE_HUGER)
 218                         maxsize = size;
 219         }
 220         return maxsize;
 221 }
 222
 223
 224 bool FontList::hasChangeInRange(pos_type pos, int len) const
 225 {
 226         List::const_iterator cit = fontIterator(pos);
 227         return cit == list_.end() || pos + len - 1 <= cit->pos();
 228 }
 229
 230
 231 void FontList::validate(LaTeXFeatures & features) const
 232 {
 233         const_iterator fcit = list_.begin();
 234         const_iterator fend = list_.end();
 235         for (; fcit != fend; ++fcit)
 236                 fcit->font().validate(features);
 237 }
 238
 239 } // namespace lyx