lyx_mirror/src/dociterator.C
André Pönitz 292e28b228 fix redo creation crash, explanation later
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@9172 a592a061-630c-0410-9148-cb99ea01b6c8
2004-11-05 06:12:21 +00:00

477 lines
8.6 KiB
C

/**
* \file dociterator.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "dociterator.h"
#include "debug.h"
#include "lyxtext.h"
#include "lyxrow.h"
#include "paragraph.h"
#include "mathed/math_data.h"
#include "mathed/math_inset.h"
#include <boost/assert.hpp>
using std::endl;
// We could be able to get rid of this if only every BufferView were
// associated to a buffer on construction.
DocIterator::DocIterator()
: inset_(0)
{}
DocIterator::DocIterator(InsetBase & inset)
: inset_(&inset)
{}
DocIterator doc_iterator_begin(InsetBase & inset)
{
DocIterator dit(inset);
dit.forwardPos();
return dit;
}
DocIterator doc_iterator_end(InsetBase & inset)
{
return DocIterator(inset);
}
InsetBase * DocIterator::nextInset()
{
BOOST_ASSERT(!empty());
if (pos() == lastpos())
return 0;
if (pos() > lastpos()) {
lyxerr << "Should not happen, but it does. " << endl;
return 0;
}
if (inMathed())
return nextAtom().nucleus();
return paragraph().isInset(pos()) ? paragraph().getInset(pos()) : 0;
}
InsetBase * DocIterator::prevInset()
{
BOOST_ASSERT(!empty());
if (pos() == 0)
return 0;
if (inMathed())
return prevAtom().nucleus();
return paragraph().isInset(pos() - 1) ? paragraph().getInset(pos() - 1) : 0;
}
InsetBase const * DocIterator::prevInset() const
{
BOOST_ASSERT(!empty());
if (pos() == 0)
return 0;
if (inMathed())
return prevAtom().nucleus();
return paragraph().isInset(pos() - 1) ? paragraph().getInset(pos() - 1) : 0;
}
MathAtom const & DocIterator::prevAtom() const
{
BOOST_ASSERT(!empty());
BOOST_ASSERT(pos() > 0);
return cell()[pos() - 1];
}
MathAtom & DocIterator::prevAtom()
{
BOOST_ASSERT(!empty());
BOOST_ASSERT(pos() > 0);
return cell()[pos() - 1];
}
MathAtom const & DocIterator::nextAtom() const
{
BOOST_ASSERT(!empty());
//lyxerr << "lastpos: " << lastpos() << " next atom:\n" << *this << endl;
BOOST_ASSERT(pos() < lastpos());
return cell()[pos()];
}
MathAtom & DocIterator::nextAtom()
{
BOOST_ASSERT(!empty());
//lyxerr << "lastpos: " << lastpos() << " next atom:\n" << *this << endl;
BOOST_ASSERT(pos() < lastpos());
return cell()[pos()];
}
LyXText * DocIterator::text() const
{
BOOST_ASSERT(!empty());
return top().text();
}
Paragraph & DocIterator::paragraph()
{
BOOST_ASSERT(inTexted());
return top().paragraph();
}
Paragraph const & DocIterator::paragraph() const
{
BOOST_ASSERT(inTexted());
return top().paragraph();
}
Row & DocIterator::textRow()
{
return *paragraph().getRow(pos());
}
Row const & DocIterator::textRow() const
{
return *paragraph().getRow(pos());
}
DocIterator::par_type DocIterator::lastpar() const
{
return inMathed() ? 0 : text()->paragraphs().size() - 1;
}
DocIterator::pos_type DocIterator::lastpos() const
{
return inMathed() ? cell().size() : paragraph().size();
}
DocIterator::row_type DocIterator::crow() const
{
return paragraph().row(pos());
}
DocIterator::row_type DocIterator::lastcrow() const
{
return paragraph().rows.size();
}
DocIterator::idx_type DocIterator::lastidx() const
{
return top().lastidx();
}
size_t DocIterator::nargs() const
{
// assume 1x1 grid for main text
return top().nargs();
}
size_t DocIterator::ncols() const
{
// assume 1x1 grid for main text
return top().ncols();
}
size_t DocIterator::nrows() const
{
// assume 1x1 grid for main text
return top().nrows();
}
DocIterator::row_type DocIterator::row() const
{
return top().row();
}
DocIterator::col_type DocIterator::col() const
{
return top().col();
}
MathArray const & DocIterator::cell() const
{
BOOST_ASSERT(inMathed());
return top().cell();
}
MathArray & DocIterator::cell()
{
BOOST_ASSERT(inMathed());
return top().cell();
}
bool DocIterator::inMathed() const
{
return !empty() && inset().inMathed();
}
bool DocIterator::inTexted() const
{
return !empty() && !inset().inMathed();
}
LyXText * DocIterator::innerText() const
{
BOOST_ASSERT(!empty());
// go up until first non-0 text is hit
// (innermost text is 0 in mathed)
for (int i = size() - 1; i >= 0; --i)
if (operator[](i).text())
return operator[](i).text();
return 0;
}
InsetBase * DocIterator::innerInsetOfType(int code) const
{
for (int i = size() - 1; i >= 0; --i)
if (operator[](i).inset_->lyxCode() == code)
return operator[](i).inset_;
return 0;
}
void DocIterator::forwardPos()
{
//this dog bites his tail
if (empty()) {
push_back(CursorSlice(*inset_));
return;
}
CursorSlice & top = back();
//lyxerr << "XXX\n" << *this << endl;
// this is used twice and shows up in the profiler!
pos_type const lastp = lastpos();
// move into an inset to the right if possible
InsetBase * n = 0;
if (top.pos() != lastp) {
// this is impossible for pos() == size()
if (inMathed()) {
n = (top.cell().begin() + top.pos())->nucleus();
} else {
if (paragraph().isInset(top.pos()))
n = paragraph().getInset(top.pos());
}
}
if (n && n->isActive()) {
//lyxerr << "... descend" << endl;
push_back(CursorSlice(*n));
return;
}
// otherwise move on one position if possible
if (top.pos() < lastp) {
//lyxerr << "... next pos" << endl;
++top.pos();
return;
}
//lyxerr << "... no next pos" << endl;
// otherwise move on one paragraph if possible
if (top.par() < lastpar()) {
//lyxerr << "... next par" << endl;
++top.par();
top.pos() = 0;
return;
}
//lyxerr << "... no next par" << endl;
// otherwise try to move on one cell if possible
if (top.idx() < lastidx()) {
//lyxerr << "... next idx" << endl;
++top.idx();
top.par() = 0;
top.pos() = 0;
return;
}
//lyxerr << "... no next idx" << endl;
// otherwise leave inset and jump over inset as a whole
pop_back();
// 'top' is invalid now...
if (size())
++back().pos();
}
void DocIterator::forwardPar()
{
forwardPos();
while (!empty() && (!inTexted() || pos() != 0))
forwardPos();
}
void DocIterator::forwardChar()
{
forwardPos();
while (size() != 0 && pos() == lastpos())
forwardPos();
}
void DocIterator::forwardInset()
{
forwardPos();
while (size() != 0 && (pos() == lastpos() || nextInset() == 0))
forwardPos();
}
void DocIterator::backwardChar()
{
backwardPos();
while (size() != 0 && pos() == lastpos())
backwardPos();
}
void DocIterator::backwardPos()
{
//this dog bites his tail
if (empty()) {
push_back(CursorSlice(*inset_));
back().idx() = lastidx();
back().par() = lastpar();
back().pos() = lastpos();
return;
}
CursorSlice & top = back();
if (top.pos() != 0) {
--top.pos();
} else if (top.par() != 0) {
--top.par();
top.pos() = lastpos();
return;
} else if (top.idx() != 0) {
--top.idx();
top.par() = lastpar();
top.pos() = lastpos();
return;
} else {
pop_back();
return;
}
// move into an inset to the left if possible
InsetBase * n = 0;
if (inMathed()) {
n = (top.cell().begin() + top.pos())->nucleus();
} else {
if (paragraph().isInset(top.pos()))
n = paragraph().getInset(top.pos());
}
if (n && n->isActive()) {
push_back(CursorSlice(*n));
back().idx() = lastidx();
back().par() = lastpar();
back().pos() = lastpos();
}
}
bool DocIterator::hasPart(DocIterator const & it) const
{
// it can't be a part if it is larger
if (it.size() > size())
return false;
// as inset adresses are the 'last' level
return &it.back().inset() == &operator[](it.size() - 1).inset();
}
std::ostream & operator<<(std::ostream & os, DocIterator const & dit)
{
for (size_t i = 0, n = dit.size(); i != n; ++i)
os << " " << dit.operator[](i) << "\n";
return os;
}
///////////////////////////////////////////////////////
StableDocIterator::StableDocIterator(const DocIterator & dit)
{
data_ = dit;
for (size_t i = 0, n = data_.size(); i != n; ++i)
data_[i].inset_ = 0;
}
DocIterator StableDocIterator::asDocIterator(InsetBase * inset) const
{
// this function re-creates the cache of inset pointers
//lyxerr << "converting:\n" << *this << endl;
DocIterator dit = DocIterator(*inset);
for (size_t i = 0, n = data_.size(); i != n; ++i) {
if (inset == 0) {
// FIXME
lyxerr << "Should not happen, but does e.g. after C-n C-l C-z S-C-z"
<< endl << "dit: " << dit << endl
<< " lastpos: " << dit.lastpos() << endl;
//break;
BOOST_ASSERT(false);
}
dit.push_back(data_[i]);
dit.back().inset_ = inset;
if (i + 1 != n)
inset = dit.nextInset();
}
//lyxerr << "convert:\n" << *this << " to:\n" << dit << endl;
return dit;
}
std::ostream & operator<<(std::ostream & os, StableDocIterator const & dit)
{
for (size_t i = 0, n = dit.data_.size(); i != n; ++i)
os << " " << dit.data_[i] << "\n";
return os;
}