src/TexRow.cpp

   1 /**
   2  * \file TexRow.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Matthias Ettrich
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "TexRow.h"
  16
  17 #include "support/debug.h"
  18
  19 #include <algorithm>
  20
  21
  22 namespace lyx {
  23
  24
  25 void TexRow::reset()
  26 {
  27         rowlist.clear();
  28         lastid = -1;
  29         lastpos = -1;
  30 }
  31
  32
  33 void TexRow::start(int id, int pos)
  34 {
  35         lastid = id;
  36         lastpos = pos;
  37 }
  38
  39
  40 void TexRow::newline()
  41 {
  42         int const id = lastid;
  43         RowList::value_type tmp(id, lastpos);
  44         rowlist.push_back(tmp);
  45 }
  46
  47
  48 bool TexRow::getIdFromRow(int row, int & id, int & pos) const
  49 {
  50         if (row <= 0 || row > int(rowlist.size())) {
  51                 id = -1;
  52                 pos = 0;
  53                 return false;
  54         }
  55
  56         id = rowlist[row - 1].id();
  57         pos = rowlist[row - 1].pos();
  58         return true;
  59 }
  60
  61
  62 int TexRow::getRowFromIdPos(int id, int pos) const
  63 {
  64         bool foundid = false;
  65
  66         // this loop finds the last *nonempty* row with the same id
  67         // and position <= pos
  68         RowList::const_iterator bestrow = rowlist.begin();
  69         RowList::const_iterator it = rowlist.begin();
  70         RowList::const_iterator const end = rowlist.end();
  71         for (; it != end; ++it) {
  72                 if (it->id() == id && it->pos() <= pos) {
  73                         foundid = true;
  74                         if (bestrow->id() != id || it->pos() > bestrow->pos())
  75                                 bestrow = it;
  76                 } else if (foundid)
  77                         break;
  78         }
  79         if (!foundid)
  80                 return rowlist.size();
  81         return distance(rowlist.begin(), bestrow);
  82 }
  83
  84
  85 } // namespace lyx