lyx_mirror/src/CursorSlice.cpp
Alfredo Braunstein 09b0a337ca move forwardIdx to CursorSlice from DocIterator, as it was the only one able to travel into an invalid cursor position
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@19763 a592a061-630c-0410-9148-cb99ea01b6c8
2007-08-23 21:35:40 +00:00

222 lines
3.6 KiB
C++

/**
* \file CursorSlice.cpp
* 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 "CursorSlice.h"
#include "debug.h"
#include "Text.h"
#include "Paragraph.h"
#include "insets/Inset.h"
#include "mathed/InsetMath.h"
#include "mathed/MathData.h"
#include <boost/assert.hpp>
using std::endl;
namespace lyx {
CursorSlice::CursorSlice()
: inset_(0), idx_(0), pit_(0), pos_(0)
{}
CursorSlice::CursorSlice(Inset & p)
: inset_(&p), idx_(0), pit_(0), pos_(0)
{
BOOST_ASSERT(inset_);
}
MathData & CursorSlice::cell() const
{
return inset_->asInsetMath()->cell(idx_);
}
Paragraph & CursorSlice::paragraph() const
{
return text()->getPar(pit_);
}
pos_type CursorSlice::lastpos() const
{
BOOST_ASSERT(inset_);
return inset_->asInsetMath() ? cell().size() : paragraph().size();
}
pit_type CursorSlice::lastpit() const
{
if (inset().inMathed())
return 0;
return text()->paragraphs().size() - 1;
}
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_);
}
void CursorSlice::forwardPos()
{
// move on one position if possible
if (pos() < lastpos()) {
//lyxerr << "... next pos" << endl;
++pos();
return;
}
// otherwise move on one paragraph if possible
if (pit() < lastpit()) {
//lyxerr << "... next par" << endl;
++pit();
pos() = 0;
return;
}
// otherwise move on one cell
//lyxerr << "... next idx" << endl;
BOOST_ASSERT(idx() < nargs());
++idx();
pit() = 0;
pos() = 0;
}
void CursorSlice::forwardIdx()
{
BOOST_ASSERT(idx() < nargs());
++idx();
pit() = 0;
pos() = 0;
}
void CursorSlice::backwardPos()
{
if (pos() != 0) {
--pos();
return;
}
if (pit() != 0) {
--pit();
pos() = lastpos();
return;
}
if (idx() != 0) {
--idx();
pit() = lastpit();
pos() = lastpos();
return;
}
BOOST_ASSERT(false);
}
bool CursorSlice::at_end() const
{
return idx() == lastidx() && pit() == lastpit() && pos() == lastpos();
}
bool CursorSlice::at_begin() const
{
return idx() == 0 && pit() == 0 && pos() == 0;
}
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()
;
}
} // namespace lyx