lyx_mirror/src/cursor_slice.C
Georg Baum 864515f3a3 avoid comparing the addresses of dereferenced 0 pointers
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15172 a592a061-630c-0410-9148-cb99ea01b6c8
2006-09-27 16:10:47 +00:00

137 lines
2.5 KiB
C

/**
* \file cursor_slice.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
* \author Matthias Ettrich
* \author André Pönitz
* \author Jürgen Vigna
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "cursor_slice.h"
#include "debug.h"
#include "lyxtext.h"
#include "paragraph.h"
#include "mathed/InsetMath.h"
#include "mathed/MathData.h"
#include <boost/assert.hpp>
using std::endl;
CursorSlice::CursorSlice()
: inset_(0), idx_(0), pit_(0), pos_(0)
{}
CursorSlice::CursorSlice(InsetBase & p)
: inset_(&p), idx_(0), pit_(0), pos_(0)
{
BOOST_ASSERT(inset_);
}
MathArray & CursorSlice::cell() const
{
return inset_->asInsetMath()->cell(idx_);
}
Paragraph & CursorSlice::paragraph()
{
return text()->getPar(pit_);
}
Paragraph const & CursorSlice::paragraph() const
{
return text()->getPar(pit_);
}
CursorSlice::pos_type CursorSlice::lastpos() const
{
BOOST_ASSERT(inset_);
return inset_->asInsetMath() ? cell().size() : paragraph().size();
}
CursorSlice::row_type CursorSlice::row() const
{
BOOST_ASSERT(asInsetMath());
return asInsetMath()->row(idx_);
}
CursorSlice::col_type CursorSlice::col() const
{
BOOST_ASSERT(asInsetMath());
return asInsetMath()->col(idx_);
}
bool operator==(CursorSlice const & p, CursorSlice const & q)
{
return p.inset_ == q.inset_
&& p.idx() == q.idx()
&& p.pit() == q.pit()
&& p.pos() == q.pos();
}
bool operator!=(CursorSlice const & p, CursorSlice const & q)
{
return p.inset_ != q.inset_
|| p.idx() != q.idx()
|| p.pit() != q.pit()
|| p.pos() != q.pos();
}
bool operator<(CursorSlice const & p, CursorSlice const & q)
{
if (&p.inset() != &q.inset()) {
lyxerr << "can't compare cursor and anchor in different insets\n"
<< "p: " << p << '\n' << "q: " << q << endl;
BOOST_ASSERT(false);
}
if (p.idx() != q.idx())
return p.idx() < q.idx();
if (p.pit() != q.pit())
return p.pit() < q.pit();
return p.pos() < q.pos();
}
bool operator>(CursorSlice const & p, CursorSlice const & q)
{
return q < p;
}
bool operator<=(CursorSlice const & p, CursorSlice const & q)
{
return !(q < p);
}
std::ostream & operator<<(std::ostream & os, CursorSlice const & item)
{
return os
<< "inset: " << &item.inset()
// << " text: " << item.text()
<< " idx: " << item.idx()
<< " par: " << item.pit()
<< " pos: " << item.pos()
// << " x: " << item.inset().x()
// << " y: " << item.inset().y()
;
}