lyx_mirror/src/CursorSlice.cpp

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/**
* \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 "Text.h"
#include "Paragraph.h"
#include "support/debug.h"
#include "insets/Inset.h"
#include "mathed/InsetMath.h"
#include "mathed/MathData.h"
#include "support/lassert.h"
#include <ostream>
using namespace std;
namespace lyx {
CursorSlice::CursorSlice()
: inset_(0), idx_(0), pit_(0), pos_(0)
{}
CursorSlice::CursorSlice(Inset & p)
: inset_(&p), idx_(0), pit_(0), pos_(0)
{
LASSERT(inset_, /**/);
}
MathData & CursorSlice::cell() const
{
return inset_->asInsetMath()->cell(idx_);
}
Paragraph & CursorSlice::paragraph() const
{
return text()->getPar(pit_);
}
pos_type CursorSlice::lastpos() const
{
LASSERT(inset_, /**/);
return inset_->asInsetMath() ? cell().size()
: (text()->empty() ? 0 : paragraph().size());
}
pit_type CursorSlice::lastpit() const
{
if (inset_->inMathed())
return 0;
return text()->paragraphs().size() - 1;
}
CursorSlice::row_type CursorSlice::row() const
{
LASSERT(asInsetMath(), /**/);
return asInsetMath()->row(idx_);
}
CursorSlice::col_type CursorSlice::col() const
{
LASSERT(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;
LASSERT(idx_ < nargs(), /**/);
++idx_;
pit_ = 0;
pos_ = 0;
}
void CursorSlice::forwardIdx()
{
LASSERT(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;
}
LASSERT(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_) {
LYXERR0("can't compare cursor and anchor in different insets\n"
<< "p: " << p << '\n' << "q: " << q);
LASSERT(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);
}
ostream & operator<<(ostream & os, CursorSlice const & item)
{
return os
<< "inset: " << (void *)item.inset_
// << " text: " << item.text()
<< " idx: " << item.idx_
<< " par: " << item.pit_
<< " pos: " << item.pos_
// << " x: " << item.inset_->x()
// << " y: " << item.inset_->y()
;
}
} // namespace lyx