X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FCutAndPaste.C;h=36c863428ff1f183dce6c9092f39c18c789aea12;hb=c544107e324090c6eafb4c56749da2624b9b1122;hp=18d131816c5b040d6c97b2af41b3083ec044a88f;hpb=17c8764e0a3c5adcb970fd7803a6255cfe4bf01f;p=lyx.git

diff --git a/src/CutAndPaste.C b/src/CutAndPaste.C
index 18d131816c..36c863428f 100644
--- a/src/CutAndPaste.C
+++ b/src/CutAndPaste.C
@@ -1,124 +1,137 @@
-/* This file is part of
- * ======================================================
+/* \file CutAndPaste.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
  *
- *           LyX, The Document Processor
+ * \author Juergen Vigna
+ * \author Lars Gullik Bjønnes
+ * \author Alfredo Braunstein
  *
- *           Copyright 1995-2001 The LyX Team.
- *
- * ====================================================== */
+ * Full author contact details are available in file CREDITS
+ */
 
 #include <config.h>
 
 #include "CutAndPaste.h"
 #include "BufferView.h"
 #include "buffer.h"
+#include "errorlist.h"
 #include "paragraph.h"
 #include "ParagraphParameters.h"
 #include "lyxtext.h"
 #include "lyxcursor.h"
-#include "gettext.h"
 #include "iterators.h"
 #include "lyxtextclasslist.h"
 #include "undo_funcs.h"
+#include "gettext.h"
 #include "paragraph_funcs.h"
 #include "debug.h"
+#include "insets/insetinclude.h"
+#include "insets/insettabular.h"
 
-#include "insets/inseterror.h"
-
-#include "support/BoostFormat.h"
+#include "support/LAssert.h"
+#include "support/lstrings.h"
+#include "support/limited_stack.h"
 
 using std::endl;
 using std::pair;
+using std::make_pair;
+using std::for_each;
+using std::vector;
+
+using namespace lyx::support;
 using lyx::pos_type;
 using lyx::textclass_type;
 
-extern BufferView * current_view;
-
-// Jürgen, note that this means that you cannot currently have a list
-// of selections cut/copied. So IMHO later we should have a
-// list/vector/deque that we could store
-// struct selection_item {
-//       Paragraph * buf;
-//       LyXTextClassList::size_type textclass;
-// };
-// in and some method of choosing beween them (based on the first few chars
-// in the selection probably.) This would be a nice feature and quite
-// easy to implement. (Lgb)
-//
-// Sure but I just cleaned up this code for now with the same functionality
-// as before. I also want to add a XClipboard function so that we can copy
-// text from LyX to some other X-application in the form of ASCII or in the
-// form of LaTeX (or Docbook depending on the document-class!). Think how nice
-// it could be to select a math-inset do a "Copy to X-Clipboard as LaTeX" and
-// then do a middle mouse button click in the application you want and have
-// the whole formula there in LaTeX-Code. (Jug)
+
+typedef limited_stack<pair<ParagraphList, textclass_type> > CutStack;
 
 namespace {
 
-// FIXME: stupid name
-ParagraphList paragraphs;
-textclass_type textclass = 0;
+CutStack cuts(10);
 
 } // namespace anon
 
 
-bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
-			       int start, int & end, textclass_type tc,
-			       bool doclear, bool realcut)
+std::vector<string>
+CutAndPaste::availableSelections(Buffer const & buffer)
 {
-	if (!startpar || (start > startpar->size()))
-		return false;
+	vector<string> selList;
+
+	CutStack::const_iterator cit = cuts.begin();
+	CutStack::const_iterator end = cuts.end();
+	for (; cit != end; ++cit) {
+		// we do not use cit-> here because gcc 2.9x does not
+		// like it (JMarc)
+		ParagraphList const & pars = (*cit).first;
+		string asciiSel;
+		ParagraphList::const_iterator pit = pars.begin();
+		ParagraphList::const_iterator pend = pars.end();
+		for (; pit != pend; ++pit) {
+			asciiSel += pit->asString(&buffer, false);
+			if (asciiSel.size() > 25) {
+				asciiSel.replace(22, string::npos, "...");
+				break;
+			}
+		}
 
-	if (realcut) {
-		copySelection(startpar, *endpar, start, end, tc);
+		selList.push_back(asciiSel);
 	}
 
-	if (!endpar || startpar == *endpar) {
-		if (startpar->erase(start, end)) {
-			// Some chars were erased, go to start to be safe
-			end = start;
-		}
-		return true;
-	}
+	return selList;
+}
 
-	bool actually_erased = false;
 
-	// clear end/begin fragments of the first/last par in selection
-	actually_erased |= (startpar)->erase(start, startpar->size());
-	if ((*endpar)->erase(0, end)) {
-		actually_erased = true;
-		end = 0;
-	}
+PitPosPair CutAndPaste::cutSelection(BufferParams const & params,
+				     ParagraphList & pars,
+				     ParagraphList::iterator startpit,
+				     ParagraphList::iterator endpit,
+				     int startpos, int endpos,
+				     textclass_type tc, bool doclear)
+{
+	copySelection(startpit, endpit, startpos, endpos, tc);
+	return eraseSelection(params, pars, startpit, endpit, startpos,
+			      endpos, doclear);
+}
 
-	// Loop through the deleted pars if any, erasing as needed
 
-	Paragraph * pit = startpar->next();
+PitPosPair CutAndPaste::eraseSelection(BufferParams const & params,
+				       ParagraphList & pars,
+				       ParagraphList::iterator startpit,
+				       ParagraphList::iterator endpit,
+				       int startpos, int endpos, bool doclear)
+{
+	if (startpit == pars.end() || (startpos > startpit->size()))
+		return PitPosPair(endpit, endpos);
 
-	while (true) {
-		// *endpar can be 0
-		if (!pit)
-			break;
+	if (endpit == pars.end() || startpit == endpit) {
+		endpos -= startpit->erase(startpos, endpos);
+		return PitPosPair(endpit, endpos);
+	}
 
-		Paragraph * next = pit->next();
+	// clear end/begin fragments of the first/last par in selection
+	bool all_erased = true;
 
-		// "erase" the contents of the par
-		if (pit != *endpar) {
-			actually_erased |= pit->erase(0, pit->size());
+	startpit->erase(startpos, startpit->size());
+	if (startpit->size() != startpos)
+		all_erased = false;
 
-			// remove the par if it's now empty
-			if (actually_erased) {
-				pit->previous()->next(pit->next());
-				if (next) {
-					next->previous(pit->previous());
-				}
+	endpos -= endpit->erase(0, endpos);
+	if (endpos != 0)
+		all_erased = false;
 
-				delete pit;
-			}
-		}
+	// Loop through the deleted pars if any, erasing as needed
 
-		if (pit == *endpar)
-			break;
+	ParagraphList::iterator pit = boost::next(startpit);
 
+	while (pit != endpit && pit != pars.end()) {
+		ParagraphList::iterator const next = boost::next(pit);
+		// "erase" the contents of the par
+		pit->erase(0, pit->size());
+		if (!pit->size()) {
+			// remove the par if it's now empty
+			pars.erase(pit);
+		} else
+			all_erased = false;
 		pit = next;
 	}
 
@@ -131,134 +144,109 @@ bool CutAndPaste::cutSelection(Paragraph * startpar, Paragraph ** endpar,
 	}
 #endif
 
-	if (!startpar->next())
-		return true;
-
-	Buffer * buffer = current_view->buffer();
+	if (boost::next(startpit) == pars.end())
+		return PitPosPair(endpit, endpos);
 
 	if (doclear) {
-		startpar->next()->stripLeadingSpaces();
+		boost::next(startpit)->stripLeadingSpaces();
 	}
 
-	if (!actually_erased)
-		return true;
-
 	// paste the paragraphs again, if possible
-	if (startpar->hasSameLayout(startpar->next()) ||
-	    startpar->next()->empty()) {
-#warning This is suspect. (Lgb)
-		// When doing this merge we must know if the par really
-		// belongs to an inset, and if it does then we have to use
-		// the insets paragraphs, and not the buffers. (Lgb)
-		mergeParagraph(buffer->params, buffer->paragraphs, startpar);
+	if (all_erased &&
+	    (startpit->hasSameLayout(*boost::next(startpit)) ||
+	     boost::next(startpit)->empty())) {
+		mergeParagraph(params, pars, startpit);
 		// this because endpar gets deleted here!
-		(*endpar) = startpar;
+		endpit = startpit;
+		endpos = startpos;
 	}
 
-	return true;
+	return PitPosPair(endpit, endpos);
+
 }
 
 
-bool CutAndPaste::copySelection(Paragraph * startpar, Paragraph * endpar,
+namespace {
+
+struct resetOwnerAndChanges {
+	void operator()(Paragraph & p) {
+		p.cleanChanges();
+		p.setInsetOwner(0);
+	}
+};
+
+} // anon namespace
+
+bool CutAndPaste::copySelection(ParagraphList::iterator startpit,
+				ParagraphList::iterator endpit,
 				int start, int end, textclass_type tc)
 {
-	if (!startpar || (start > startpar->size()))
-		return false;
+	Assert(0 <= start && start <= startpit->size());
+	Assert(0 <= end && end <= endpit->size());
+	Assert(startpit != endpit || start <= end);
 
-	paragraphs.clear();
+	ParagraphList paragraphs;
 
-	textclass = tc;
+	// Clone the paragraphs within the selection.
+	ParagraphList::iterator postend = boost::next(endpit);
 
-	if (!endpar || startpar == endpar) {
-		// only within one paragraph
-		ParagraphList::iterator buf =
-			paragraphs.insert(paragraphs.begin(), new Paragraph);
+	paragraphs.assign(startpit, postend);
+	for_each(paragraphs.begin(), paragraphs.end(), resetOwnerAndChanges());
 
-		buf->layout(startpar->layout());
-		pos_type i = start;
-		if (end > startpar->size())
-			end = startpar->size();
-		for (; i < end; ++i) {
-			startpar->copyIntoMinibuffer(*current_view->buffer(), i);
-			buf->insertFromMinibuffer(buf->size());
-		}
-	} else {
-		// copy more than one paragraph
-		// clone the paragraphs within the selection
-		Paragraph * tmppar = startpar;
-
-		while (tmppar != endpar) {
-			Paragraph * newpar = new Paragraph(*tmppar, false);
-			// reset change info
-			newpar->cleanChanges();
-			newpar->setInsetOwner(0);
-
-			paragraphs.push_back(newpar);
-			tmppar = tmppar->next();
-		}
+	// Cut out the end of the last paragraph.
+	Paragraph & back = paragraphs.back();
+	back.erase(end, back.size());
+
+	// Cut out the begin of the first paragraph
+	Paragraph & front = paragraphs.front();
+	front.erase(0, start);
+
+	cuts.push(make_pair(paragraphs, tc));
 
-		// The first paragraph is too big.
-		Paragraph & front = paragraphs.front();
-		pos_type tmpi2 = start;
-		for (; tmpi2; --tmpi2)
-			front.erase(0);
-
-		// Now last paragraph is too big, delete all after end.
-		Paragraph & back = paragraphs.back();
-		tmpi2 = end;
-		while (back.size() > tmpi2) {
-			back.erase(back.size() - 1);
-		}
-	}
 	return true;
 }
 
 
-bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
-				 int & pos, textclass_type tc)
+pair<PitPosPair, ParagraphList::iterator>
+CutAndPaste::pasteSelection(Buffer const & buffer,
+			    ParagraphList & pars,
+			    ParagraphList::iterator pit, int pos,
+			    textclass_type tc,
+			    ErrorList & errorlist)
 {
-	if (!checkPastePossible())
-		return false;
+	return pasteSelection(buffer, pars, pit, pos, tc, 0, errorlist);
+}
 
-	if (pos > (*par)->size())
-		pos = (*par)->size();
 
-	// many paragraphs
+pair<PitPosPair, ParagraphList::iterator>
+CutAndPaste::pasteSelection(Buffer const & buffer,
+			    ParagraphList & pars,
+			    ParagraphList::iterator pit, int pos,
+			    textclass_type tc, size_t cut_index,
+			    ErrorList & errorlist)
+{
+	if (!checkPastePossible())
+		return make_pair(PitPosPair(pit, pos), pit);
 
-	// make a copy of the simple cut_buffer
-#if 1
-	ParagraphList::iterator it = paragraphs.begin();
+	Assert (pos <= pit->size());
 
-	ParagraphList simple_cut_clone;
-	simple_cut_clone.insert(simple_cut_clone.begin(),
-				new Paragraph(*it, false));
+	// Make a copy of the CaP paragraphs.
+	ParagraphList simple_cut_clone = cuts[cut_index].first;
+	textclass_type const textclass = cuts[cut_index].second;
 
-	ParagraphList::iterator end = paragraphs.end();
-	while (boost::next(it) != end) {
-		++it;
-		simple_cut_clone.insert(simple_cut_clone.end(),
-					new Paragraph(*it, false));
-	}
-#else
-	// Later we want it done like this:
-	ParagraphList simple_cut_clone(paragraphs.begin(),
-				       paragraphs.end());
-#endif
-	// now remove all out of the buffer which is NOT allowed in the
-	// new environment and set also another font if that is required
-	ParagraphList::iterator tmpbuf = paragraphs.begin();
-	int depth_delta = (*par)->params().depth() - tmpbuf->params().depth();
-	// Temporary set *par as previous of tmpbuf as we might have
-	// to realize the font.
-	tmpbuf->previous(*par);
+	// Now remove all out of the pars which is NOT allowed in the
+	// new environment and set also another font if that is required.
 
-	// make sure there is no class difference
-	SwitchLayoutsBetweenClasses(textclass, tc, &*tmpbuf,
-				    current_view->buffer()->params);
+	// Make sure there is no class difference.
+	SwitchLayoutsBetweenClasses(textclass, tc, simple_cut_clone,
+				    errorlist);
 
-	Paragraph::depth_type max_depth = (*par)->getMaxDepthAfter();
+	ParagraphList::iterator tmpbuf = simple_cut_clone.begin();
+	int depth_delta = pit->params().depth() - tmpbuf->params().depth();
 
-	while (tmpbuf != paragraphs.end()) {
+	Paragraph::depth_type max_depth = pit->getMaxDepthAfter();
+
+	for (; tmpbuf != simple_cut_clone.end(); ++tmpbuf) {
 		// If we have a negative jump so that the depth would
 		// go below 0 depth then we have to redo the delta to
 		// this new max depth level so that subsequent
@@ -266,153 +254,163 @@ bool CutAndPaste::pasteSelection(Paragraph ** par, Paragraph ** endpar,
 		// at level 0.
 		if ((int(tmpbuf->params().depth()) + depth_delta) < 0)
 			depth_delta = 0;
-		// set the right depth so that we are not too deep or shallow.
+
+		// Set the right depth so that we are not too deep or shallow.
 		tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 		if (tmpbuf->params().depth() > max_depth)
 			tmpbuf->params().depth(max_depth);
-		// only set this from the 2nd on as the 2nd depends for maxDepth
-		// still on *par
-		if (tmpbuf->previous() != (*par))
+
+		// Only set this from the 2nd on as the 2nd depends
+		// for maxDepth still on pit.
+		if (tmpbuf != simple_cut_clone.begin())
 			max_depth = tmpbuf->getMaxDepthAfter();
-		// set the inset owner of this paragraph
-		tmpbuf->setInsetOwner((*par)->inInset());
+
+		// Set the inset owner of this paragraph.
+		tmpbuf->setInsetOwner(pit->inInset());
 		for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 			if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
-				if (!(*par)->insetAllowed(tmpbuf->getInset(i)->lyxCode())) {
+				if (!pit->insetAllowed(tmpbuf->getInset(i)->lyxCode())) {
 					tmpbuf->erase(i--);
 				}
 			} else {
-				LyXFont f1 = tmpbuf->getFont(current_view->buffer()->params,i);
+				LyXFont f1 = tmpbuf->getFont(buffer.params, i, outerFont(pit, pars));
 				LyXFont f2 = f1;
-				if (!(*par)->checkInsertChar(f1)) {
+				if (!pit->checkInsertChar(f1)) {
 					tmpbuf->erase(i--);
 				} else if (f1 != f2) {
 					tmpbuf->setFont(i, f1);
 				}
 			}
 		}
-		tmpbuf = tmpbuf->next();
 	}
 
-	// now reset it to 0
-	paragraphs.begin()->previous(0);
+	// Make the buf exactly the same layout than
+	// the cursor paragraph.
+	simple_cut_clone.begin()->makeSameLayout(*pit);
+
+	// Prepare the paragraphs and insets for insertion
+	// A couple of insets store buffer references so need
+	// updating
+	ParIterator fpit(simple_cut_clone.begin(), simple_cut_clone);
+	ParIterator fend(simple_cut_clone.end(), simple_cut_clone);
+
+	for (; fpit != fend; ++fpit) {
+		InsetList::iterator lit = fpit->insetlist.begin();
+		InsetList::iterator eit = fpit->insetlist.end();
+
+		for (; lit != eit; ++lit) {
+			switch (lit->inset->lyxCode()) {
+			case InsetOld::INCLUDE_CODE: {
+				InsetInclude * ii = static_cast<InsetInclude*>(lit->inset);
+				InsetInclude::Params ip = ii->params();
+				ip.masterFilename_ = buffer.fileName();
+				ii->set(ip);
+				break;
+			}
 
-	// make the buf exactly the same layout than
-	// the cursor paragraph
-	paragraphs.begin()->makeSameLayout(*par);
+			case InsetOld::TABULAR_CODE: {
+				InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
+				it->buffer(const_cast<Buffer*>(&buffer));
+				break;
+			}
 
-	// find the end of the buffer
-	ParagraphList::iterator lastbuffer = paragraphs.begin();
-	while (boost::next(lastbuffer) != paragraphs.end())
-		++lastbuffer;
+			default:
+				break; // nothing
+			}
+		}
+	}
 
 	bool paste_the_end = false;
 
-	// open the paragraph for inserting the buf
-	// if necessary
-	if (((*par)->size() > pos) || !(*par)->next()) {
-		breakParagraphConservative(
-			current_view->buffer()->params, current_view->buffer()->paragraphs, *par, pos);
+	// Open the paragraph for inserting the buf
+	// if necessary.
+	if (pit->size() > pos || boost::next(pit) == pars.end()) {
+		breakParagraphConservative(buffer.params,
+					   pars, pit, pos);
 		paste_the_end = true;
 	}
-	// set the end for redoing later
-	*endpar = (*par)->next()->next();
-
-	// paste it!
-	lastbuffer->next((*par)->next());
-	(*par)->next()->previous(&*lastbuffer);
-
-	(*par)->next(&*paragraphs.begin());
-	paragraphs.begin()->previous(*par);
-
-	if ((*par)->next() == lastbuffer)
-		lastbuffer = *par;
-
-	mergeParagraph(current_view->buffer()->params,
-		       current_view->buffer()->paragraphs, *par);
-	// store the new cursor position
-	*par = &*lastbuffer;
-	pos = lastbuffer->size();
-	// maybe some pasting
-	if (lastbuffer->next() && paste_the_end) {
-		if (lastbuffer->next()->hasSameLayout(&*lastbuffer)) {
-			mergeParagraph(current_view->buffer()->params,
-				       current_view->buffer()->paragraphs, lastbuffer);
-		} else if (!lastbuffer->next()->size()) {
-			lastbuffer->next()->makeSameLayout(&*lastbuffer);
-			mergeParagraph(current_view->buffer()->params, current_view->buffer()->paragraphs, lastbuffer);
-		} else if (!lastbuffer->size()) {
-			lastbuffer->makeSameLayout(lastbuffer->next());
-			mergeParagraph(current_view->buffer()->params,
-				       current_view->buffer()->paragraphs, lastbuffer);
+
+	// Set the end for redoing later.
+	ParagraphList::iterator endpit = boost::next(boost::next(pit));
+
+	// Paste it!
+
+	ParagraphList::iterator past_pit = boost::next(pit);
+	pars.splice(past_pit, simple_cut_clone);
+	ParagraphList::iterator last_paste = boost::prior(past_pit);
+
+	// If we only inserted one paragraph.
+	if (boost::next(pit) == last_paste)
+		last_paste = pit;
+
+	mergeParagraph(buffer.params, pars, pit);
+
+	// Store the new cursor position.
+	pit = last_paste;
+	pos = last_paste->size();
+
+	// Maybe some pasting.
+#warning CHECK! Are we comparing last_paste to the wrong list here? (Lgb)
+	if (boost::next(last_paste) != pars.end() &&
+	    paste_the_end) {
+		if (boost::next(last_paste)->hasSameLayout(*last_paste)) {
+			mergeParagraph(buffer.params, pars,
+				       last_paste);
+		} else if (boost::next(last_paste)->empty()) {
+			boost::next(last_paste)->makeSameLayout(*last_paste);
+			mergeParagraph(buffer.params, pars,
+				       last_paste);
+		} else if (last_paste->empty()) {
+			last_paste->makeSameLayout(*boost::next(last_paste));
+			mergeParagraph(buffer.params, pars,
+				       last_paste);
 		} else
-			lastbuffer->next()->stripLeadingSpaces();
+			boost::next(last_paste)->stripLeadingSpaces();
 	}
-	// restore the simple cut buffer
-	paragraphs = simple_cut_clone;
 
-	return true;
+	return make_pair(PitPosPair(pit, pos), endpit);
 }
 
 
 int CutAndPaste::nrOfParagraphs()
 {
-	return paragraphs.size();
+	return cuts.empty() ? 0 : cuts[0].first.size();
 }
 
 
 int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 					     textclass_type c2,
-					     Paragraph * par,
-					     BufferParams const & /*bparams*/)
+					     ParagraphList & pars,
+					     ErrorList & errorlist)
 {
+	Assert(!pars.empty());
+
 	int ret = 0;
-	if (!par || c1 == c2)
+	if (c1 == c2)
 		return ret;
 
 	LyXTextClass const & tclass1 = textclasslist[c1];
 	LyXTextClass const & tclass2 = textclasslist[c2];
-	ParIterator end = ParIterator();
-	for (ParIterator it = ParIterator(par); it != end; ++it) {
-		par = *it;
-		string const name = par->layout()->name();
+	ParIterator end = ParIterator(pars.end(), pars);
+	for (ParIterator it = ParIterator(pars.begin(), pars); it != end; ++it) {
+		string const name = it->layout()->name();
 		bool hasLayout = tclass2.hasLayout(name);
 
 		if (hasLayout)
-			par->layout(tclass2[name]);
+			it->layout(tclass2[name]);
 		else
-			par->layout(tclass2.defaultLayout());
+			it->layout(tclass2.defaultLayout());
 
 		if (!hasLayout && name != tclass1.defaultLayoutName()) {
 			++ret;
-#if USE_BOOST_FORMAT
-			boost::format fmt(_("Layout had to be changed from\n"
-					    "%1$s to %2$s\n"
-					    "because of class conversion from\n"
-					    "%3$s to %4$s"));
-			fmt     % name
-				% par->layout()->name()
-				% tclass1.name()
-				% tclass2.name();
-
-			string const s = fmt.str();
-#else
-			string const s = _("Layout had to be changed from\n")
-				+ name + _(" to ")
-				+ par->layout()->name()
-				+ _("\nbecause of class conversion from\n")
-				+ tclass1.name() + _(" to ")
-				+ tclass2.name();
-#endif
-			freezeUndo();
-			InsetError * new_inset = new InsetError(s);
-			LyXText * txt = current_view->getLyXText();
-			LyXCursor cur = txt->cursor;
-			txt->setCursorIntern(par, 0);
-			txt->insertInset(new_inset);
-			txt->fullRebreak();
-			txt->setCursorIntern(cur.par(), cur.pos());
-			unFreezeUndo();
+			string const s = bformat(
+				_("Layout had to be changed from\n%1$s to %2$s\n"
+				"because of class conversion from\n%3$s to %4$s"),
+			 name, it->layout()->name(), tclass1.name(), tclass2.name());
+			// To warn the user that something had to be done.
+			errorlist.push_back(ErrorItem("Changed Layout", s,
+						      it->id(), 0,
+						      it->size()));
 		}
 	}
 	return ret;
@@ -421,5 +419,5 @@ int CutAndPaste::SwitchLayoutsBetweenClasses(textclass_type c1,
 
 bool CutAndPaste::checkPastePossible()
 {
-	return !paragraphs.empty();
+	return !cuts.empty() && !cuts[0].first.empty();
 }