* reverting r18516, so no signals anymore in CursorSlices

* Alfredo Braunstein's patch to fix cursors properly
* CursorSlice::lastpit() added


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18723 a592a061-630c-0410-9148-cb99ea01b6c8

src/CursorSlice.cpp

@@ -42,10 +42,6 @@ CursorSlice::CursorSlice(Inset & p)
 	: inset_(&p), idx_(0), pit_(0), pos_(0)
 {
 	BOOST_ASSERT(inset_);
-	boost::signal<void()> * destroyed_signal = inset_->destroyedSignal();
-	if (destroyed_signal)
-		inset_connection_ = destroyed_signal->connect(
-			boost::bind(&CursorSlice::invalidate, this));
 }
 
 
@@ -55,22 +51,12 @@ CursorSlice::CursorSlice(CursorSlice const & cs)
 }
 
 
-CursorSlice::~CursorSlice()
-{
-	inset_connection_.disconnect();
-}
-
-
 CursorSlice & CursorSlice::operator=(CursorSlice const & cs)
 {
 	inset_ = cs.inset_;
 	idx_ = cs.idx_;
 	pit_ = cs.pit_;
 	pos_ = cs.pos_;
-	if (inset_ && inset_->destroyedSignal()) {
-		inset_connection_ = inset_->destroyedSignal()->connect(
-			boost::bind(&CursorSlice::invalidate, this));
-	}
 	return *this;
 }
 
@@ -112,6 +98,14 @@ pos_type CursorSlice::lastpos() const
 }
 
 
+pit_type CursorSlice::lastpit() const
+{
+	if (inset().inMathed())
+		return 0;
+	return text()->paragraphs().size() - 1;
+}
+
+
 CursorSlice::row_type CursorSlice::row() const
 {
 	BOOST_ASSERT(asInsetMath());

src/CursorSlice.h

@@ -41,7 +41,7 @@ class Paragraph;
 // that of MathData and Text should vanish. They are conceptually the
 // same (now...)
 
-class CursorSlice : public boost::signals::trackable {
+class CursorSlice {
 public:
 	/// Those needs inset_ access.
 	///@{
@@ -63,8 +63,6 @@ public:
 	///
 	explicit CursorSlice(Inset &);
 	///
-	virtual ~CursorSlice();
-	///
 	CursorSlice & operator=(CursorSlice const &);
 	///
 	bool isValid() const;
@@ -81,6 +79,8 @@ public:
 	pit_type pit() const { return pit_; }
 	/// set the offset of the paragraph this cursor is in
 	pit_type & pit() { return pit_; }
+	/// return the last paragraph offset this cursor is in
+	pit_type lastpit() const;
 	/// increments the paragraph this cursor is in
 	void incrementPar();
 	/// decrements the paragraph this cursor is in
@@ -158,8 +158,6 @@ private:
 	bool pit_valid_;
 	/// position in this cell
 	pos_type pos_;
-	/// connection to referred \c inset_ destruction signal.
-	boost::signals::connection inset_connection_;
 };
 
 /// test for equality

src/DocIterator.cpp

@@ -4,6 +4,7 @@
  * Licence details can be found in the file COPYING.
  *
  * \author André Pönitz
+ * \author Alfredo Braunstein
  *
  * Full author contact details are available in file CREDITS.
  */
@@ -560,53 +561,55 @@ void DocIterator::updateInsets(Inset * inset)
 
 bool DocIterator::fixIfBroken()
 {
-	bool fixed = false;
-
-	for (size_t i = slices_.size() - 1; i != 0; --i)
-		if (!slices_[i].isValid()) {
-			pop_back();
-			fixed = true;
+	// Go through the slice stack from the bottom. 
+	// Check that all coordinates (idx, pit, pos) are correct and
+	// that the inset is the one which is claimed to be there
+	Inset * inset = &slices_[0].inset();
+	size_t i = 0;
+	size_t n = slices_.size();
+	for (; i != n; ++i) {
+		CursorSlice & cs = slices_[i];
+		if (&cs.inset() != inset) {
+			// the whole slice is wrong, chop off this as well
+			--i;
+			LYXERR(Debug::DEBUG) << "fixIfBroken(): inset changed" << endl;
+			break;
+		} else if (cs.idx() > cs.lastidx()) {
+			cs.idx() = cs.lastidx();
+			cs.pit() = cs.lastpit();
+			cs.pos() = cs.lastpos();
+			LYXERR(Debug::DEBUG) << "fixIfBroken(): idx fixed" << endl;
+			break;
+		} else if (cs.pit() > cs.lastpit()) {
+			cs.pit() = cs.lastpit();
+			cs.pos() = cs.lastpos();
+			LYXERR(Debug::DEBUG) << "fixIfBroken(): pit fixed" << endl;
+			break;
+		} else if (cs.pos() > cs.lastpos()) {
+			cs.pos() = cs.lastpos();
+			LYXERR(Debug::DEBUG) << "fixIfBroken(): pos fixed" << endl;
+			break;
+		} else if (i != n - 1 && cs.pos() != cs.lastpos()) {
+			// get inset which is supposed to be in the next slice
+			if (cs.inset().inMathed())
+				inset = (cs.cell().begin() + cs.pos())->nucleus();
+			else if (cs.paragraph().isInset(cs.pos()))
+				inset = cs.paragraph().getInset(cs.pos());
+			else {
+				// there are slices left, so there must be another inset
+				break;
+			}
+		}
 	}
 
-	// The top level CursorSlice should always be valid.
-	BOOST_ASSERT(slices_[0].isValid());
-
-	if (idx() > lastidx()) {
-		lyxerr << "wrong idx " << idx()
-			<< ", max is " << lastidx()
-			<< " at level " << depth()
-			<< ". Trying to correct this."  << endl;
-		lyxerr << "old: " << *this << endl;
-		for (size_t i = idx(); i != lastidx(); --i)
-			pop_back();
-		idx() = lastidx();
-		pit() = lastpit();
-		pos() = lastpos();
-		fixed = true;
-	}
-	else if (pit() > lastpit()) {
-		lyxerr << "wrong pit " << pit()
-			<< ", max is " << lastpit()
-			<< " at level " << depth()
-			<< ". Trying to correct this."  << endl;
-		lyxerr << "old: " << *this << endl;
-		pit() = lastpit();
-		pos() = 0;
-		fixed = true;
-	}
-	else if (pos() > lastpos()) {
-		lyxerr << "wrong pos " << pos()
-			<< ", max is " << lastpos()
-			<< " at level " << depth()
-			<< ". Trying to correct this."  << endl;
-		lyxerr << "old: " << *this << endl;
-		pos() = lastpos();
-		fixed = true;
-	}
-	if (fixed) {
-		lyxerr << "new: " << *this << endl;
-	}
-	return fixed;
+	// Did we make it through the whole slice stack? Otherwise there
+	// was a problem at slice i, and we have to chop off above
+	if (i < n) {
+		LYXERR(Debug::DEBUG) << "fixIfBroken(): cursor chopped at " << i << endl;
+		resize(i + 1);
+		return true;
+	} else
+		return false;
 }