lyx_mirror/src/ParagraphMetrics.cpp
André Pönitz 6add1994c7 rename LyXTextClass* into TextClass*
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18097 a592a061-630c-0410-9148-cb99ea01b6c8
2007-04-29 19:53:54 +00:00

195 lines
4.0 KiB
C++

/**
* \file Paragraph.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Asger Alstrup
* \author Lars Gullik Bjønnes
* \author Jean-Marc Lasgouttes
* \author Angus Leeming
* \author John Levon
* \author André Pönitz
* \author Dekel Tsur
* \author Jürgen Vigna
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "ParagraphMetrics.h"
#include "Buffer.h"
#include "BufferParams.h"
#include "Counters.h"
#include "Encoding.h"
#include "debug.h"
#include "gettext.h"
#include "Language.h"
#include "LaTeXFeatures.h"
#include "Font.h"
#include "LyXRC.h"
#include "Row.h"
#include "OutputParams.h"
#include "paragraph_funcs.h"
#include "rowpainter.h"
#include "sgml.h"
#include "TexRow.h"
#include "VSpace.h"
#include "frontends/FontMetrics.h"
#include "insets/InsetBibitem.h"
#include "insets/InsetOptArg.h"
#include "support/lstrings.h"
#include "support/textutils.h"
#include "support/convert.h"
#include "support/unicode.h"
#include <boost/bind.hpp>
#include <boost/crc.hpp>
#include <algorithm>
#include <list>
#include <stack>
#include <sstream>
namespace lyx {
using lyx::support::contains;
using lyx::support::rsplit;
using support::subst;
using std::distance;
using std::endl;
using std::list;
using std::stack;
using std::string;
using std::ostream;
using std::ostringstream;
ParagraphMetrics::ParagraphMetrics(Paragraph const & par): par_(&par)
{
}
ParagraphMetrics & ParagraphMetrics::operator=(
ParagraphMetrics const & pm)
{
rows_ = pm.rows_;
dim_ = pm.dim_;
par_ = pm.par_;
return *this;
}
size_type ParagraphMetrics::calculateRowSignature(Row const & row)
{
boost::crc_32_type crc;
for (pos_type i = row.pos(); i < row.endpos(); ++i) {
char_type const b[] = { par_->getChar(i) };
crc.process_bytes(b, 1);
}
return crc.checksum();
}
void ParagraphMetrics::updateRowChangeStatus()
{
size_t const size = rows_.size();
row_change_status_.resize(size);
row_signature_.resize(size);
for (size_t i = 0; i != size; ++i) {
// Row signature; has row changed since last update?
size_type const row_sig = calculateRowSignature(rows_[i]);
row_change_status_[i] = row_signature_[i] != row_sig;
row_signature_[i] = row_sig;
}
}
Row & ParagraphMetrics::getRow(pos_type pos, bool boundary)
{
BOOST_ASSERT(!rows().empty());
// If boundary is set we should return the row on which
// the character before is inside.
if (pos > 0 && boundary)
--pos;
RowList::iterator rit = rows_.end();
RowList::iterator const begin = rows_.begin();
for (--rit; rit != begin && rit->pos() > pos; --rit)
;
return *rit;
}
Row const & ParagraphMetrics::getRow(pos_type pos, bool boundary) const
{
BOOST_ASSERT(!rows().empty());
// If boundary is set we should return the row on which
// the character before is inside.
if (pos > 0 && boundary)
--pos;
RowList::const_iterator rit = rows_.end();
RowList::const_iterator const begin = rows_.begin();
for (--rit; rit != begin && rit->pos() > pos; --rit)
;
return *rit;
}
size_t ParagraphMetrics::pos2row(pos_type pos) const
{
BOOST_ASSERT(!rows().empty());
RowList::const_iterator rit = rows_.end();
RowList::const_iterator const begin = rows_.begin();
for (--rit; rit != begin && rit->pos() > pos; --rit)
;
return rit - begin;
}
void ParagraphMetrics::dump() const
{
lyxerr << "Paragraph::dump: rows.size(): " << rows_.size() << endl;
for (size_t i = 0; i != rows_.size(); ++i) {
lyxerr << " row " << i << ": ";
rows_[i].dump();
}
}
int ParagraphMetrics::rightMargin(Buffer const & buffer) const
{
BufferParams const & params = buffer.params();
TextClass const & tclass = params.getTextClass();
docstring trmarg = from_utf8(tclass.rightmargin());
docstring lrmarg = from_utf8(par_->layout()->rightmargin);
frontend::FontMetrics const & fm = theFontMetrics(params.getFont());
int const r_margin =
lyx::rightMargin()
+ fm.signedWidth(trmarg)
+ fm.signedWidth(lrmarg)
* 4 / (par_->getDepth() + 4);
return r_margin;
}
} // namespace lyx