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https://git.lyx.org/repos/lyx.git
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9b4a26a252
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@24559 a592a061-630c-0410-9148-cb99ea01b6c8
594 lines
12 KiB
C++
594 lines
12 KiB
C++
/**
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* \file DocIterator.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author André Pönitz
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* \author Alfredo Braunstein
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "DocIterator.h"
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#include "InsetList.h"
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#include "Paragraph.h"
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#include "Text.h"
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#include "mathed/MathData.h"
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#include "mathed/InsetMath.h"
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#include "insets/InsetTabular.h"
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#include "support/debug.h"
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#include "support/lassert.h"
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#include <ostream>
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using namespace std;
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namespace lyx {
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// We could be able to get rid of this if only every BufferView were
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// associated to a buffer on construction.
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DocIterator::DocIterator()
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: boundary_(false), inset_(0)
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{}
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DocIterator::DocIterator(Inset & inset)
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: boundary_(false), inset_(&inset)
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{}
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DocIterator doc_iterator_begin(Inset & inset)
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{
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DocIterator dit(inset);
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dit.forwardPos();
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return dit;
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}
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DocIterator doc_iterator_end(Inset & inset)
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{
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return DocIterator(inset);
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}
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LyXErr & operator<<(LyXErr & os, DocIterator const & it)
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{
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os.stream() << it;
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return os;
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}
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Inset * DocIterator::nextInset() const
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{
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LASSERT(!empty(), /**/);
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if (pos() == lastpos())
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return 0;
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if (pos() > lastpos()) {
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LYXERR0("Should not happen, but it does. ");
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return 0;
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}
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if (inMathed())
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return nextAtom().nucleus();
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return paragraph().getInset(pos());
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}
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Inset * DocIterator::prevInset() const
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{
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LASSERT(!empty(), /**/);
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if (pos() == 0)
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return 0;
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if (inMathed()) {
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if (cell().empty())
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// FIXME: this should not happen but it does.
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// See bug 3189
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// http://bugzilla.lyx.org/show_bug.cgi?id=3189
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return 0;
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else
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return prevAtom().nucleus();
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}
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return paragraph().getInset(pos() - 1);
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}
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Inset * DocIterator::realInset() const
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{
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LASSERT(inTexted(), /**/);
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// if we are in a tabular, we need the cell
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if (inset().lyxCode() == TABULAR_CODE) {
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InsetTabular & tabular = static_cast<InsetTabular&>(inset());
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return tabular.cell(idx()).get();
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}
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return &inset();
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}
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MathAtom & DocIterator::prevAtom() const
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{
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LASSERT(!empty(), /**/);
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LASSERT(pos() > 0, /**/);
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return cell()[pos() - 1];
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}
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MathAtom & DocIterator::nextAtom() const
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{
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LASSERT(!empty(), /**/);
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//lyxerr << "lastpos: " << lastpos() << " next atom:\n" << *this << endl;
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LASSERT(pos() < lastpos(), /**/);
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return cell()[pos()];
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}
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Text * DocIterator::text() const
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{
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LASSERT(!empty(), /**/);
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return top().text();
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}
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Paragraph & DocIterator::paragraph() const
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{
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if (!inTexted())
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LYXERR0(*this);
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LASSERT(inTexted(), /**/);
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return top().paragraph();
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}
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Paragraph & DocIterator::innerParagraph() const
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{
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LASSERT(!empty(), /**/);
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return innerTextSlice().paragraph();
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}
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CursorSlice const & DocIterator::innerTextSlice() const
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{
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LASSERT(!empty(), /**/);
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// go up until first non-0 text is hit
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// (innermost text is 0 in mathed)
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for (int i = depth() - 1; i >= 0; --i)
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if (slices_[i].text())
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return slices_[i];
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// This case is in principe not possible. We _must_
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// be inside a Text.
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LASSERT(false, /**/);
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static CursorSlice dummy;
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return dummy;
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}
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pit_type DocIterator::lastpit() const
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{
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return inMathed() ? 0 : text()->paragraphs().size() - 1;
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}
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pos_type DocIterator::lastpos() const
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{
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return inMathed() ? cell().size() : paragraph().size();
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}
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DocIterator::idx_type DocIterator::lastidx() const
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{
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return top().lastidx();
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}
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size_t DocIterator::nargs() const
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{
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// assume 1x1 grid for main text
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return top().nargs();
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}
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size_t DocIterator::ncols() const
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{
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// assume 1x1 grid for main text
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return top().ncols();
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}
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size_t DocIterator::nrows() const
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{
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// assume 1x1 grid for main text
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return top().nrows();
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}
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DocIterator::row_type DocIterator::row() const
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{
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return top().row();
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}
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DocIterator::col_type DocIterator::col() const
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{
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return top().col();
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}
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MathData & DocIterator::cell() const
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{
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// LASSERT(inMathed(), /**/);
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return top().cell();
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}
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Text * DocIterator::innerText() const
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{
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LASSERT(!empty(), /**/);
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// go up until first non-0 text is hit
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// (innermost text is 0 in mathed)
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for (int i = depth() - 1; i >= 0; --i)
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if (slices_[i].text())
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return slices_[i].text();
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return 0;
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}
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Inset * DocIterator::innerInsetOfType(int code) const
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{
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for (int i = depth() - 1; i >= 0; --i)
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if (slices_[i].inset_->lyxCode() == code)
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return slices_[i].inset_;
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return 0;
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}
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// This duplicates code above, but is in the critical path.
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// So please think twice before adding stuff
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void DocIterator::forwardPos()
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{
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// this dog bites his tail
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if (empty()) {
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push_back(CursorSlice(*inset_));
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return;
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}
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CursorSlice & tip = top();
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//lyxerr << "XXX\n" << *this << endl;
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// not at cell/paragraph end?
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if (tip.pos() != tip.lastpos()) {
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// move into an inset to the right if possible
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Inset * n = 0;
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if (inMathed())
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n = (tip.cell().begin() + tip.pos())->nucleus();
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else
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n = paragraph().getInset(tip.pos());
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if (n && n->isActive()) {
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//lyxerr << "... descend" << endl;
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push_back(CursorSlice(*n));
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return;
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}
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}
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// jump to the next cell/paragraph if possible
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if (!tip.at_end()) {
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tip.forwardPos();
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return;
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}
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// otherwise leave inset and jump over inset as a whole
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pop_back();
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// 'tip' is invalid now...
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if (!empty())
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++top().pos();
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}
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void DocIterator::forwardPosIgnoreCollapsed()
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{
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Inset * const nextinset = nextInset();
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// FIXME: the check for asInsetMath() shouldn't be necessary
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// but math insets do not return a sensible editable() state yet.
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if (nextinset && !nextinset->asInsetMath()
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&& nextinset->editable() != Inset::HIGHLY_EDITABLE) {
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++top().pos();
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return;
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}
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forwardPos();
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}
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void DocIterator::forwardPar()
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{
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forwardPos();
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while (!empty() && (!inTexted() || pos() != 0)) {
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if (inTexted()) {
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pos_type const lastp = lastpos();
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Paragraph const & par = paragraph();
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pos_type & pos = top().pos();
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if (par.insetList().empty())
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pos = lastp;
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else
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while (pos < lastp && !par.isInset(pos))
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++pos;
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}
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forwardPos();
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}
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}
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void DocIterator::forwardChar()
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{
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forwardPos();
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while (!empty() && pos() == lastpos())
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forwardPos();
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}
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void DocIterator::forwardInset()
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{
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forwardPos();
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while (!empty() && !nextInset()) {
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if (inTexted()) {
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pos_type const lastp = lastpos();
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Paragraph const & par = paragraph();
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pos_type & pos = top().pos();
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while (pos < lastp && !par.isInset(pos))
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++pos;
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if (pos < lastp)
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break;
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}
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forwardPos();
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}
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}
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void DocIterator::backwardChar()
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{
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backwardPos();
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while (!empty() && pos() == lastpos())
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backwardPos();
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}
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void DocIterator::backwardPos()
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{
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//this dog bites his tail
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if (empty()) {
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push_back(CursorSlice(*inset_));
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top().idx() = lastidx();
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top().pit() = lastpit();
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top().pos() = lastpos();
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return;
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}
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// at inset beginning?
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if (top().at_begin()) {
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pop_back();
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return;
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}
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top().backwardPos();
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// entered another cell/paragraph from the right?
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if (top().pos() == top().lastpos())
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return;
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// move into an inset to the left if possible
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Inset * n = 0;
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if (inMathed())
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n = (top().cell().begin() + top().pos())->nucleus();
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else
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n = paragraph().getInset(top().pos());
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if (n && n->isActive()) {
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push_back(CursorSlice(*n));
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top().idx() = lastidx();
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top().pit() = lastpit();
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top().pos() = lastpos();
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}
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}
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bool DocIterator::hasPart(DocIterator const & it) const
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{
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// it can't be a part if it is larger
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if (it.depth() > depth())
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return false;
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// as inset adresses are the 'last' level
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return &it.top().inset() == &slices_[it.depth() - 1].inset();
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}
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void DocIterator::updateInsets(Inset * inset)
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{
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// this function re-creates the cache of inset pointers.
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//lyxerr << "converting:\n" << *this << endl;
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DocIterator dit = *this;
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size_t const n = slices_.size();
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slices_.resize(0);
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for (size_t i = 0 ; i < n; ++i) {
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LASSERT(inset, /**/);
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push_back(dit[i]);
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top().inset_ = inset;
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if (i + 1 != n)
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inset = nextInset();
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}
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//lyxerr << "converted:\n" << *this << endl;
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}
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bool DocIterator::fixIfBroken()
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{
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if (empty())
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return false;
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// Go through the slice stack from the bottom.
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// Check that all coordinates (idx, pit, pos) are correct and
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// that the inset is the one which is claimed to be there
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Inset * inset = &slices_[0].inset();
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size_t i = 0;
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size_t n = slices_.size();
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for (; i != n; ++i) {
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CursorSlice & cs = slices_[i];
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if (&cs.inset() != inset) {
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// the whole slice is wrong, chop off this as well
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--i;
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LYXERR(Debug::DEBUG, "fixIfBroken(): inset changed");
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break;
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} else if (cs.idx() > cs.lastidx()) {
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cs.idx() = cs.lastidx();
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cs.pit() = cs.lastpit();
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cs.pos() = cs.lastpos();
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LYXERR(Debug::DEBUG, "fixIfBroken(): idx fixed");
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break;
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} else if (cs.pit() > cs.lastpit()) {
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cs.pit() = cs.lastpit();
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cs.pos() = cs.lastpos();
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LYXERR(Debug::DEBUG, "fixIfBroken(): pit fixed");
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break;
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} else if (cs.pos() > cs.lastpos()) {
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cs.pos() = cs.lastpos();
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LYXERR(Debug::DEBUG, "fixIfBroken(): pos fixed");
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break;
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} else if (i != n - 1 && cs.pos() != cs.lastpos()) {
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// get inset which is supposed to be in the next slice
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if (cs.inset().inMathed())
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inset = (cs.cell().begin() + cs.pos())->nucleus();
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else if (Inset * csInset = cs.paragraph().getInset(cs.pos()))
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inset = csInset;
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else {
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// there are slices left, so there must be another inset
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break;
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}
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}
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}
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// Did we make it through the whole slice stack? Otherwise there
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// was a problem at slice i, and we have to chop off above
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if (i < n) {
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LYXERR(Debug::DEBUG, "fixIfBroken(): cursor chopped at " << i);
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resize(i + 1);
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return true;
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} else
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return false;
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}
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int DocIterator::find(MathData const & cell) const
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{
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for (size_t l = 0; l != slices_.size(); ++l) {
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if (slices_[l].asInsetMath() && &slices_[l].cell() == &cell)
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return l;
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}
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return -1;
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}
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int DocIterator::find(Inset const * inset) const
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{
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for (size_t l = 0; l != slices_.size(); ++l) {
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if (&slices_[l].inset() == inset)
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return l;
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}
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return -1;
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}
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void DocIterator::cutOff(int above, vector<CursorSlice> & cut)
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{
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cut = vector<CursorSlice>(slices_.begin() + above + 1, slices_.end());
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slices_.resize(above + 1);
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}
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void DocIterator::cutOff(int above)
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{
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slices_.resize(above + 1);
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}
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void DocIterator::append(vector<CursorSlice> const & x)
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{
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slices_.insert(slices_.end(), x.begin(), x.end());
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}
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void DocIterator::append(DocIterator::idx_type idx, pos_type pos)
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{
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slices_.push_back(CursorSlice());
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top().idx() = idx;
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top().pos() = pos;
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}
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ostream & operator<<(ostream & os, DocIterator const & dit)
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{
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for (size_t i = 0, n = dit.depth(); i != n; ++i)
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os << " " << dit[i] << "\n";
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return os;
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}
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///////////////////////////////////////////////////////
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StableDocIterator::StableDocIterator(DocIterator const & dit)
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{
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data_ = dit.internalData();
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for (size_t i = 0, n = data_.size(); i != n; ++i)
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data_[i].inset_ = 0;
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}
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DocIterator StableDocIterator::asDocIterator(Inset * inset) const
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{
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// this function re-creates the cache of inset pointers
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//lyxerr << "converting:\n" << *this << endl;
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DocIterator dit = DocIterator(*inset);
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for (size_t i = 0, n = data_.size(); i != n; ++i) {
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if (inset == 0) {
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// FIXME
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LYXERR0(" Should not happen, but does e.g. after "
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"C-n C-l C-z S-C-z\n"
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<< " or when a Buffer has been concurrently edited by two views"
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<< '\n' << "dit: " << dit << '\n'
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<< " lastpos: " << dit.lastpos());
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dit.fixIfBroken();
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break;
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}
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dit.push_back(data_[i]);
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dit.top().inset_ = inset;
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if (dit.fixIfBroken())
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break;
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if (i + 1 != n)
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inset = dit.nextInset();
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}
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//lyxerr << "convert:\n" << *this << " to:\n" << dit << endl;
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return dit;
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}
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ostream & operator<<(ostream & os, StableDocIterator const & dit)
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{
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for (size_t i = 0, n = dit.data_.size(); i != n; ++i)
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os << " " << dit.data_[i] << "\n";
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return os;
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}
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bool operator==(StableDocIterator const & dit1, StableDocIterator const & dit2)
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{
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return dit1.data_ == dit2.data_;
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}
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} // namespace lyx
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