+/* \file iterators.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * \author unknown
+ * \author Lars Gullik Bjønnes
+ *
+ * Full author contact details are available in file CREDITS
+ */
+
+
#include <config.h>
#include "iterators.h"
+#include "paragraph.h"
+
+#include <boost/next_prior.hpp>
+#include <boost/optional.hpp>
+
+#include <stack>
+
+using boost::next;
+using boost::optional;
+using std::stack;
+
+///
+/// ParPosition
+///
+
+class ParPosition {
+public:
+ ///
+ ParPosition(ParagraphList::iterator p, ParagraphList const & pl);
+ ///
+ ParagraphList::iterator pit;
+ ///
+ ParagraphList const * plist;
+ ///
+ optional<InsetList::iterator> it;
+ ///
+ optional<int> index;
+};
+
+
+ParPosition::ParPosition(ParagraphList::iterator p, ParagraphList const & pl)
+ : pit(p), plist(&pl)
+{
+ if (p != pl.end()) {
+ it.reset(p->insetlist.begin());
+ }
+}
+
+
+bool operator==(ParPosition const & pos1, ParPosition const & pos2)
+{
+ return pos1.pit == pos2.pit;
+}
+
+
+bool operator!=(ParPosition const & pos1, ParPosition const & pos2)
+{
+ return !(pos1 == pos2);
+}
+
+
+///
+/// ParIterator
+///
+
+struct ParIterator::Pimpl {
+ typedef stack<ParPosition> PosHolder;
+ PosHolder positions;
+};
+
+ParIterator::ParIterator(ParagraphList::iterator pit, ParagraphList const & pl)
+ : pimpl_(new Pimpl)
+{
+ pimpl_->positions.push(ParPosition(pit, pl));
+}
+
+
+ParIterator::~ParIterator()
+{}
+
+
+ParIterator::ParIterator(ParIterator const & pi)
+ : pimpl_(new Pimpl(*pi.pimpl_))
+{}
+
ParIterator & ParIterator::operator++()
{
- while (!positions.empty()) {
- ParPosition & p = positions.top();
+ while (!pimpl_->positions.empty()) {
+ ParPosition & p = pimpl_->positions.top();
// Does the current inset contain more "cells" ?
- if (p.index >= 0) {
- ++p.index;
- ParagraphList * plist = p.it.getInset()->getParagraphs(p.index);
+ if (p.index) {
+ ++(*p.index);
+ ParagraphList * plist = p.it->getInset()->getParagraphs(*p.index);
if (plist && !plist->empty()) {
- positions.push(ParPosition(&plist->front()));
+ pimpl_->positions.push(ParPosition(plist->begin(), *plist));
return *this;
}
- ++p.it;
+ ++(*p.it);
} else
// The following line is needed because the value of
// p.it may be invalid if inset was added/removed to
// the paragraph pointed by the iterator
- p.it = p.par->insetlist.begin();
+ p.it.reset(p.pit->insetlist.begin());
// Try to find the next inset that contains paragraphs
- InsetList::iterator end = p.par->insetlist.end();
- for (; p.it != end; ++p.it) {
- ParagraphList * plist = p.it.getInset()->getParagraphs(0);
+ InsetList::iterator end = p.pit->insetlist.end();
+ for (; *p.it != end; ++(*p.it)) {
+ ParagraphList * plist = p.it->getInset()->getParagraphs(0);
if (plist && !plist->empty()) {
- p.index = 0;
- positions.push(ParPosition(&plist->front()));
+ p.index.reset(0);
+ pimpl_->positions.push(ParPosition(plist->begin(), *plist));
return *this;
}
}
+
// Try to go to the next paragarph
- if (p.par->next()) {
- p = ParPosition(p.par->next());
+ if (next(p.pit) != p.plist->end()
+ || pimpl_->positions.size() == 1) {
+ ++p.pit;
+ p.index.reset();
+ p.it.reset();
+
return *this;
}
- positions.pop();
+ // Drop end and move up in the stack.
+ pimpl_->positions.pop();
}
return *this;
}
+ParagraphList::iterator ParIterator::operator*()
+{
+ return pimpl_->positions.top().pit;
+}
+
+
+ParagraphList::iterator ParIterator::operator->()
+{
+ return pimpl_->positions.top().pit;
+}
+
+
+size_t ParIterator::size() const
+{
+ return pimpl_->positions.size();
+}
+
+
+bool operator==(ParIterator const & iter1, ParIterator const & iter2)
+{
+ return iter1.pimpl_->positions == iter2.pimpl_->positions;
+}
+
+
+bool operator!=(ParIterator const & iter1, ParIterator const & iter2)
+{
+ return !(iter1 == iter2);
+}
+
+
+///
+/// ParConstIterator
+///
+
+
+struct ParConstIterator::Pimpl {
+ typedef stack<ParPosition> PosHolder;
+ PosHolder positions;
+};
+
+
+ParConstIterator::ParConstIterator(ParagraphList::iterator pit,
+ ParagraphList const & pl)
+ : pimpl_(new Pimpl)
+{
+ pimpl_->positions.push(ParPosition(pit, pl));
+}
+
+
+ParConstIterator::~ParConstIterator()
+{}
+
+
+ParConstIterator::ParConstIterator(ParConstIterator const & pi)
+ : pimpl_(new Pimpl(*pi.pimpl_))
+{}
+
+
ParConstIterator & ParConstIterator::operator++()
{
- while (!positions.empty()) {
- ParPosition & p = positions.top();
+ while (!pimpl_->positions.empty()) {
+ ParPosition & p = pimpl_->positions.top();
// Does the current inset contain more "cells" ?
- if (p.index >= 0) {
- ++p.index;
- ParagraphList * plist = p.it.getInset()->getParagraphs(p.index);
+ if (p.index) {
+ ++(*p.index);
+ ParagraphList * plist = p.it->getInset()->getParagraphs(*p.index);
if (plist && !plist->empty()) {
- positions.push(ParPosition(&plist->front()));
+ pimpl_->positions.push(ParPosition(plist->begin(), *plist));
return *this;
}
- ++p.it;
+ ++(*p.it);
} else
// The following line is needed because the value of
// p.it may be invalid if inset was added/removed to
// the paragraph pointed by the iterator
- p.it = p.par->insetlist.begin();
+ p.it.reset(p.pit->insetlist.begin());
// Try to find the next inset that contains paragraphs
- InsetList::iterator end = p.par->insetlist.end();
- for (; p.it != end; ++p.it) {
- ParagraphList * plist = p.it.getInset()->getParagraphs(0);
+ InsetList::iterator end = p.pit->insetlist.end();
+ for (; *p.it != end; ++(*p.it)) {
+ ParagraphList * plist = p.it->getInset()->getParagraphs(0);
if (plist && !plist->empty()) {
- p.index = 0;
- positions.push(ParPosition(&plist->front()));
+ p.index.reset(0);
+ pimpl_->positions.push(ParPosition(plist->begin(), *plist));
return *this;
}
}
+
// Try to go to the next paragarph
- if (p.par->next()) {
- p = ParPosition(p.par->next());
+ if (next(p.pit) != p.plist->end()
+ || pimpl_->positions.size() == 1) {
+ ++p.pit;
+ p.index.reset();
+ p.it.reset();
+
return *this;
}
- positions.pop();
+ // Drop end and move up in the stack.
+ pimpl_->positions.pop();
}
+
return *this;
}
+
+
+ParagraphList::iterator ParConstIterator::operator*()
+{
+ return pimpl_->positions.top().pit;
+}
+
+
+ParagraphList::iterator ParConstIterator::operator->()
+{
+ return pimpl_->positions.top().pit;
+}
+
+
+size_t ParConstIterator::size() const
+{
+ return pimpl_->positions.size();
+}
+
+
+bool operator==(ParConstIterator const & iter1, ParConstIterator const & iter2)
+{
+ return iter1.pimpl_->positions == iter2.pimpl_->positions;
+}
+
+
+bool operator!=(ParConstIterator const & iter1, ParConstIterator const & iter2)
+{
+ return !(iter1 == iter2);
+}
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