X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Ftext2.C;h=426cb90be03222c7d00131b5bbe8c411d4429b8f;hb=5c00d0f48978964a576070d5950556787aa365bb;hp=e7ee7adf0d2c6bcc1648b56c03f8810c9cc898c6;hpb=4e2a7f6e81710c7c68b8576f9cc16d33680186d0;p=lyx.git

diff --git a/src/text2.C b/src/text2.C
index e7ee7adf0d..426cb90be0 100644
--- a/src/text2.C
+++ b/src/text2.C
@@ -37,6 +37,7 @@
 #include "funcrequest.h"
 #include "gettext.h"
 #include "language.h"
+#include "LColor.h"
 #include "lyxrc.h"
 #include "lyxrow.h"
 #include "lyxrow_funcs.h"
@@ -59,10 +60,8 @@
 #include "support/tostr.h"
 #include "support/std_sstream.h"
 
-#include <boost/tuple/tuple.hpp>
-
+using lyx::par_type;
 using lyx::pos_type;
-using lyx::paroffset_type;
 using lyx::support::bformat;
 
 using std::endl;
@@ -70,34 +69,34 @@ using std::ostringstream;
 using std::string;
 
 
-LyXText::LyXText(BufferView * bv, InsetText * inset, bool ininset,
-	  ParagraphList & paragraphs)
-	: height(0), width(0), inset_owner(inset), bv_owner(bv),
-	  in_inset_(ininset), paragraphs_(&paragraphs),
-	  cache_pos_(-1), x0_(0), y0_(0)
+LyXText::LyXText(BufferView * bv)
+	: width_(0), maxwidth_(bv ? bv->workWidth() : 100), height_(0),
+	  background_color_(LColor::background),
+	  bv_owner(bv), xo_(0), yo_(0)
 {}
 
 
-void LyXText::init(BufferView * bview)
+void LyXText::init(BufferView * bv)
 {
-	bv_owner = bview;
-
-	ParagraphList::iterator const beg = ownerParagraphs().begin();
-	ParagraphList::iterator const end = ownerParagraphs().end();
-	for (ParagraphList::iterator pit = beg; pit != end; ++pit)
-		pit->rows.clear();
+	BOOST_ASSERT(bv);
+	bv_owner = bv;
+	maxwidth_ = bv->workWidth();
+	width_ = maxwidth_;
+	height_ = 0;
 
-	width = 0;
-	height = 0;
-	cache_pos_ = -1;
+	par_type const end = paragraphs().size();
+	for (par_type pit = 0; pit != end; ++pit)
+		pars_[pit].rows.clear();
 
-	current_font = getFont(beg, 0);
+	current_font = getFont(0, 0);
+	redoParagraphs(0, end);
+	updateCounters();
+}
 
-	redoParagraphs(beg, end);
-	setCursorIntern(0, 0);
-	selection.cursor = cursor;
 
-	updateCounters();
+bool LyXText::isMainText() const
+{
+	return &bv()->buffer()->text() == this;
 }
 
 
@@ -106,20 +105,22 @@ void LyXText::init(BufferView * bview)
 // The difference is that this one is used for displaying, and thus we
 // are allowed to make cosmetic improvements. For instance make footnotes
 // smaller. (Asger)
-LyXFont LyXText::getFont(ParagraphList::iterator pit, pos_type pos) const
+LyXFont LyXText::getFont(par_type pit, pos_type pos) const
 {
 	BOOST_ASSERT(pos >= 0);
 
-	LyXLayout_ptr const & layout = pit->layout();
+	LyXLayout_ptr const & layout = pars_[pit].layout();
+#ifdef WITH_WARNINGS
 #warning broken?
+#endif
 	BufferParams const & params = bv()->buffer()->params();
-	pos_type const body_pos = pit->beginOfBody();
+	pos_type const body_pos = pars_[pit].beginOfBody();
 
 	// We specialize the 95% common case:
-	if (!pit->getDepth()) {
-		LyXFont f = pit->getFontSettings(params, pos);
-		if (pit->inInset())
-			pit->inInset()->getDrawFont(f);
+	if (!pars_[pit].getDepth()) {
+		LyXFont f = pars_[pit].getFontSettings(params, pos);
+		if (!isMainText())
+			f.realize(font_);
 		if (layout->labeltype == LABEL_MANUAL && pos < body_pos)
 			return f.realize(layout->reslabelfont);
 		else
@@ -133,96 +134,74 @@ LyXFont LyXText::getFont(ParagraphList::iterator pit, pos_type pos) const
 	else
 		layoutfont = layout->font;
 
-	LyXFont font = pit->getFontSettings(params, pos);
+	LyXFont font = pars_[pit].getFontSettings(params, pos);
 	font.realize(layoutfont);
 
-	if (pit->inInset())
-		pit->inInset()->getDrawFont(font);
+	if (!isMainText())
+		font.realize(font_);
 
 	// Realize with the fonts of lesser depth.
-	//font.realize(outerFont(pit, ownerParagraphs()));
+	//font.realize(outerFont(pit, paragraphs()));
 	font.realize(defaultfont_);
 
 	return font;
 }
 
 
-LyXFont LyXText::getLayoutFont(ParagraphList::iterator pit) const
+LyXFont LyXText::getLayoutFont(par_type pit) const
 {
-	LyXLayout_ptr const & layout = pit->layout();
+	LyXLayout_ptr const & layout = pars_[pit].layout();
 
-	if (!pit->getDepth())
+	if (!pars_[pit].getDepth())
 		return layout->resfont;
 
 	LyXFont font = layout->font;
 	// Realize with the fonts of lesser depth.
-	//font.realize(outerFont(pit, ownerParagraphs()));
+	//font.realize(outerFont(pit, paragraphs()));
 	font.realize(defaultfont_);
 
 	return font;
 }
 
 
-LyXFont LyXText::getLabelFont(ParagraphList::iterator pit) const
+LyXFont LyXText::getLabelFont(par_type pit) const
 {
-	LyXLayout_ptr const & layout = pit->layout();
+	LyXLayout_ptr const & layout = pars_[pit].layout();
 
-	if (!pit->getDepth())
+	if (!pars_[pit].getDepth())
 		return layout->reslabelfont;
 
 	LyXFont font = layout->labelfont;
 	// Realize with the fonts of lesser depth.
-	font.realize(outerFont(pit, ownerParagraphs()));
+	font.realize(outerFont(pit, paragraphs()));
 	font.realize(defaultfont_);
 
 	return font;
 }
 
 
-void LyXText::setCharFont(ParagraphList::iterator pit,
-			  pos_type pos, LyXFont const & fnt,
-			  bool toggleall)
-{
-	BufferParams const & params = bv()->buffer()->params();
-	LyXFont font = getFont(pit, pos);
-	font.update(fnt, params.language, toggleall);
-	// Let the insets convert their font
-	if (pit->isInset(pos)) {
-		InsetOld * inset = pit->getInset(pos);
-		if (isEditableInset(inset)) {
-			static_cast<UpdatableInset *>(inset)
-				->setFont(bv(), fnt, toggleall, true);
-		}
-	}
-
-	// Plug through to version below:
-	setCharFont(pit, pos, font);
-}
-
-
-void LyXText::setCharFont(
-	ParagraphList::iterator pit, pos_type pos, LyXFont const & fnt)
+void LyXText::setCharFont(par_type pit, pos_type pos, LyXFont const & fnt)
 {
 	LyXFont font = fnt;
-	LyXLayout_ptr const & layout = pit->layout();
+	LyXLayout_ptr const & layout = pars_[pit].layout();
 
 	// Get concrete layout font to reduce against
 	LyXFont layoutfont;
 
-	if (pos < pit->beginOfBody())
+	if (pos < pars_[pit].beginOfBody())
 		layoutfont = layout->labelfont;
 	else
 		layoutfont = layout->font;
 
 	// Realize against environment font information
-	if (pit->getDepth()) {
-		ParagraphList::iterator tp = pit;
+	if (pars_[pit].getDepth()) {
+		par_type tp = pit;
 		while (!layoutfont.resolved() &&
-		       tp != ownerParagraphs().end() &&
-		       tp->getDepth()) {
-			tp = outerHook(tp, ownerParagraphs());
-			if (tp != ownerParagraphs().end())
-				layoutfont.realize(tp->layout()->font);
+		       tp != par_type(paragraphs().size()) &&
+		       pars_[tp].getDepth()) {
+			tp = outerHook(tp, paragraphs());
+			if (tp != par_type(paragraphs().size()))
+				layoutfont.realize(pars_[tp].layout()->font);
 		}
 	}
 
@@ -231,53 +210,11 @@ void LyXText::setCharFont(
 	// Now, reduce font against full layout font
 	font.reduce(layoutfont);
 
-	pit->setFont(pos, font);
-}
-
-
-InsetOld * LyXText::getInset() const
-{
-	ParagraphList::iterator pit = cursorPar();
-	pos_type const pos = cursor.pos();
-
-	if (pos < pit->size() && pit->isInset(pos)) {
-		return pit->getInset(pos);
-	}
-	return 0;
-}
-
-
-void LyXText::toggleInset()
-{
-	InsetOld * inset = getInset();
-	// is there an editable inset at cursor position?
-	if (!isEditableInset(inset)) {
-		// No, try to see if we are inside a collapsable inset
-		if (inset_owner && inset_owner->owner()
-		    && inset_owner->owner()->isOpen()) {
-			finishUndo();
-			inset_owner->owner()->close(bv());
-			bv()->getLyXText()->cursorRight(true);
-			bv()->updateParagraphDialog();
-		}
-		return;
-	}
-	//bv()->owner()->message(inset->editMessage());
-
-	// do we want to keep this?? (JMarc)
-	if (!isHighlyEditableInset(inset))
-		recUndo(cursor.par());
-
-	if (inset->isOpen())
-		inset->close(bv());
-	else
-		inset->open(bv());
-
-	bv()->update();
+	pars_[pit].setFont(pos, font);
 }
 
 
-// used in setLayout 
+// used in setLayout
 // Asger is not sure we want to do this...
 void LyXText::makeFontEntriesLayoutSpecific(BufferParams const & params,
 					    Paragraph & par)
@@ -299,196 +236,168 @@ void LyXText::makeFontEntriesLayoutSpecific(BufferParams const & params,
 }
 
 
-ParagraphList::iterator
-LyXText::setLayout(LyXCursor & cur, LyXCursor & sstart_cur,
-		   LyXCursor & send_cur,
-		   string const & layout)
+// return past-the-last paragraph influenced by a layout change on pit
+par_type LyXText::undoSpan(par_type pit)
 {
-	ParagraphList::iterator endpit = boost::next(getPar(send_cur));
-	ParagraphList::iterator undoendpit = endpit;
-	ParagraphList::iterator pars_end = ownerParagraphs().end();
-
-	if (endpit != pars_end && endpit->getDepth()) {
-		while (endpit != pars_end && endpit->getDepth()) {
-			++endpit;
-			undoendpit = endpit;
-		}
-	} else if (endpit != pars_end) {
-		// because of parindents etc.
-		++endpit;
+	par_type end = paragraphs().size();
+	par_type nextpit = pit + 1;
+	if (nextpit == end)
+		return nextpit;
+	//because of parindents
+	if (!pars_[pit].getDepth())
+		return boost::next(nextpit);
+	//because of depth constrains
+	for (; nextpit != end; ++pit, ++nextpit) {
+		if (!pars_[pit].getDepth())
+			break;
 	}
+	return nextpit;
+}
 
-	recUndo(sstart_cur.par(), parOffset(undoendpit) - 1);
 
-	// ok we have a selection. This is always between sstart_cur
-	// and sel_end cursor
-	cur = sstart_cur;
-	ParagraphList::iterator pit = getPar(sstart_cur);
-	ParagraphList::iterator epit = boost::next(getPar(send_cur));
+par_type LyXText::setLayout(par_type start, par_type end, string const & layout)
+{
+	BOOST_ASSERT(start != end);
+	par_type undopit = undoSpan(end - 1);
+	recUndo(start, undopit - 1);
 
 	BufferParams const & bufparams = bv()->buffer()->params();
-	LyXLayout_ptr const & lyxlayout =
-		bufparams.getLyXTextClass()[layout];
-
-	do {
-		pit->applyLayout(lyxlayout);
-		makeFontEntriesLayoutSpecific(bufparams, *pit);
-		pit->params().spaceTop(lyxlayout->fill_top ?
-					 VSpace(VSpace::VFILL)
-					 : VSpace(VSpace::NONE));
-		pit->params().spaceBottom(lyxlayout->fill_bottom ?
-					    VSpace(VSpace::VFILL)
-					    : VSpace(VSpace::NONE));
+	LyXLayout_ptr const & lyxlayout = bufparams.getLyXTextClass()[layout];
+
+	for (par_type pit = start; pit != end; ++pit) {
+		pars_[pit].applyLayout(lyxlayout);
+		makeFontEntriesLayoutSpecific(bufparams, pars_[pit]);
 		if (lyxlayout->margintype == MARGIN_MANUAL)
-			pit->setLabelWidthString(lyxlayout->labelstring());
-		cur.par(std::distance(ownerParagraphs().begin(), pit));
-		++pit;
-	} while (pit != epit);
+			pars_[pit].setLabelWidthString(lyxlayout->labelstring());
+	}
 
-	return endpit;
+	return undopit;
 }
 
 
 // set layout over selection and make a total rebreak of those paragraphs
-void LyXText::setLayout(string const & layout)
+void LyXText::setLayout(LCursor & cur, string const & layout)
 {
-	LyXCursor tmpcursor = cursor;  // store the current cursor
-
-	// if there is no selection just set the layout
-	// of the current paragraph
-	if (!selection.set()) {
-		selection.start = cursor;  // dummy selection
-		selection.end = cursor;
-	}
-
+	BOOST_ASSERT(this == cur.text());
 	// special handling of new environment insets
-	BufferParams const & params = bv()->buffer()->params();
+	BufferView & bv = cur.bv();
+	BufferParams const & params = bv.buffer()->params();
 	LyXLayout_ptr const & lyxlayout = params.getLyXTextClass()[layout];
 	if (lyxlayout->is_environment) {
 		// move everything in a new environment inset
 		lyxerr << "setting layout " << layout << endl;
-		bv()->owner()->dispatch(FuncRequest(LFUN_HOME));
-		bv()->owner()->dispatch(FuncRequest(LFUN_ENDSEL));
-		bv()->owner()->dispatch(FuncRequest(LFUN_CUT));
-		InsetOld * inset = new InsetEnvironment(params, layout);
-		if (bv()->insertInset(inset)) {
-			//inset->edit(bv());
-			//bv()->owner()->dispatch(FuncRequest(LFUN_PASTE));
-		}
-		else
-			delete inset;
+		bv.owner()->dispatch(FuncRequest(LFUN_HOME));
+		bv.owner()->dispatch(FuncRequest(LFUN_ENDSEL));
+		bv.owner()->dispatch(FuncRequest(LFUN_CUT));
+		InsetBase * inset = new InsetEnvironment(params, layout);
+		insertInset(cur, inset);
+		//inset->edit(cur, true);
+		//bv.owner()->dispatch(FuncRequest(LFUN_PASTE));
 		return;
 	}
 
-	ParagraphList::iterator endpit = setLayout(cursor, selection.start,
-						   selection.end, layout);
-	redoParagraphs(getPar(selection.start), endpit);
-
-	// we have to reset the selection, because the
-	// geometry could have changed
-	setCursor(selection.start.par(), selection.start.pos(), false);
-	selection.cursor = cursor;
-	setCursor(selection.end.par(), selection.end.pos(), false);
+	par_type start = cur.selBegin().par();
+	par_type end = cur.selEnd().par() + 1;
+	par_type endpit = setLayout(start, end, layout);
+	redoParagraphs(start, endpit);
 	updateCounters();
-	clearSelection();
-	setSelection();
-	setCursor(tmpcursor.par(), tmpcursor.pos(), true);
 }
 
 
-bool LyXText::changeDepth(bv_funcs::DEPTH_CHANGE type, bool test_only)
+namespace {
+
+
+void getSelectionSpan(LCursor & cur, par_type & beg, par_type & end)
 {
-	ParagraphList::iterator pit = cursorPar();
-	ParagraphList::iterator end = pit;
-	ParagraphList::iterator start = pit;
-
-	if (selection.set()) {
-		pit = getPar(selection.start);
-		end = getPar(selection.end);
-		start = pit;
+	if (!cur.selection()) {
+		beg = cur.par();
+		end = cur.par() + 1;
+	} else {
+		beg = cur.selBegin().par();
+		end = cur.selEnd().par() + 1;
 	}
+}
 
-	ParagraphList::iterator pastend = boost::next(end);
-
-	if (!test_only)
-		recUndo(parOffset(start), parOffset(end));
 
-	bool changed = false;
+bool changeDepthAllowed(LyXText::DEPTH_CHANGE type,
+	Paragraph const & par, int max_depth)
+{
+	if (par.layout()->labeltype == LABEL_BIBLIO)
+		return false;
+	int const depth = par.params().depth();
+	if (type == LyXText::INC_DEPTH && depth < max_depth)
+		return true;
+	if (type == LyXText::DEC_DEPTH && depth > 0)
+		return true;
+	return false;
+}
 
-	int prev_after_depth = 0;
-#warning parlist ... could be nicer ?
-	if (start != ownerParagraphs().begin()) {
-		prev_after_depth = boost::prior(start)->getMaxDepthAfter();
-	}
 
-	while (true) {
-		int const depth = pit->params().depth();
-		if (type == bv_funcs::INC_DEPTH) {
-			if (depth < prev_after_depth
-			    && pit->layout()->labeltype != LABEL_BIBLIO) {
-				changed = true;
-				if (!test_only)
-					pit->params().depth(depth + 1);
-			}
-		} else if (depth) {
-			changed = true;
-			if (!test_only)
-				pit->params().depth(depth - 1);
-		}
+}
 
-		prev_after_depth = pit->getMaxDepthAfter();
 
-#warning SERIOUS: Uahh... does this mean we access end->getMaxDepthAfter?
-		if (pit == end) {
-			break;
-		}
+bool LyXText::changeDepthAllowed(LCursor & cur, DEPTH_CHANGE type) const
+{
+	BOOST_ASSERT(this == cur.text());
+	par_type beg, end;
+	getSelectionSpan(cur, beg, end);
+	int max_depth = 0;
+	if (beg != 0)
+		max_depth = pars_[beg - 1].getMaxDepthAfter();
 
-		++pit;
+	for (par_type pit = beg; pit != end; ++pit) {
+		if (::changeDepthAllowed(type, pars_[pit], max_depth))
+			return true;
+		max_depth = pars_[pit].getMaxDepthAfter();
 	}
+	return false;
+}
 
-	if (test_only)
-		return changed;
 
-	redoParagraphs(start, pastend);
+void LyXText::changeDepth(LCursor & cur, DEPTH_CHANGE type)
+{
+	BOOST_ASSERT(this == cur.text());
+	par_type beg, end;
+	getSelectionSpan(cur, beg, end);
+	recordUndoSelection(cur);
 
-	// We need to actually move the text->cursor. I don't
-	// understand why ...
-	LyXCursor tmpcursor = cursor;
+	int max_depth = 0;
+	if (beg != 0)
+		max_depth = pars_[beg - 1].getMaxDepthAfter();
 
-	// we have to reset the visual selection because the
-	// geometry could have changed
-	if (selection.set()) {
-		setCursor(selection.start.par(), selection.start.pos());
-		selection.cursor = cursor;
-		setCursor(selection.end.par(), selection.end.pos());
+	for (par_type pit = beg; pit != end; ++pit) {
+		if (::changeDepthAllowed(type, pars_[pit], max_depth)) {
+			int const depth = pars_[pit].params().depth();
+			if (type == INC_DEPTH)
+				pars_[pit].params().depth(depth + 1);
+			else
+				pars_[pit].params().depth(depth - 1);
+		}
+		max_depth = pars_[pit].getMaxDepthAfter();
 	}
-
 	// this handles the counter labels, and also fixes up
 	// depth values for follow-on (child) paragraphs
 	updateCounters();
-
-	setSelection();
-	setCursor(tmpcursor.par(), tmpcursor.pos());
-
-	return changed;
 }
 
 
-// set font over selection and make a total rebreak of those paragraphs
-void LyXText::setFont(LyXFont const & font, bool toggleall)
+// set font over selection
+void LyXText::setFont(LCursor & cur, LyXFont const & font, bool toggleall)
 {
+	BOOST_ASSERT(this == cur.text());
 	// if there is no selection just set the current_font
-	if (!selection.set()) {
+	if (!cur.selection()) {
 		// Determine basis font
 		LyXFont layoutfont;
-		if (cursor.pos() < cursorPar()->beginOfBody()) {
-			layoutfont = getLabelFont(cursorPar());
-		} else {
-			layoutfont = getLayoutFont(cursorPar());
-		}
+		par_type pit = cur.par();
+		if (cur.pos() < pars_[pit].beginOfBody())
+			layoutfont = getLabelFont(pit);
+		else
+			layoutfont = getLayoutFont(pit);
+
 		// Update current font
 		real_current_font.update(font,
-					 bv()->buffer()->params().language,
+					 cur.buffer().params().language,
 					 toggleall);
 
 		// Reduce to implicit settings
@@ -500,208 +409,147 @@ void LyXText::setFont(LyXFont const & font, bool toggleall)
 		return;
 	}
 
-	LyXCursor tmpcursor = cursor; // store the current cursor
-
-	// ok we have a selection. This is always between sel_start_cursor
-	// and sel_end cursor
-
-	recUndo(selection.start.par(), selection.end.par());
-	freezeUndo();
-	cursor = selection.start;
-	while (cursor.par() != selection.end.par() ||
-	       cursor.pos() < selection.end.pos())
-	{
-		if (cursor.pos() < cursorPar()->size()) {
-			// an open footnote should behave like a closed one
-			setCharFont(cursorPar(), cursor.pos(), font, toggleall);
-			cursor.pos(cursor.pos() + 1);
-		} else {
-			cursor.pos(0);
-			cursor.par(cursor.par() + 1);
-		}
-	}
-	unFreezeUndo();
-
-	redoParagraph(getPar(selection.start));
-
-	// we have to reset the selection, because the
-	// geometry could have changed, but we keep
-	// it for user convenience
-	setCursor(selection.start.par(), selection.start.pos());
-	selection.cursor = cursor;
-	setCursor(selection.end.par(), selection.end.pos());
-	setSelection();
-	setCursor(tmpcursor.par(), tmpcursor.pos(), true,
-		  tmpcursor.boundary());
-}
-
-
-// important for the screen
+	// Ok, we have a selection.
+	recordUndoSelection(cur);
 
+	par_type const beg = cur.selBegin().par();
+	par_type const end = cur.selEnd().par();
 
-// the cursor set functions have a special mechanism. When they
-// realize, that you left an empty paragraph, they will delete it.
+	DocIterator pos = cur.selectionBegin();
+	DocIterator posend = cur.selectionEnd();
 
-// need the selection cursor:
-void LyXText::setSelection()
-{
-	TextCursor::setSelection();
-}
+	lyxerr << "pos: " << pos << " posend: " << posend << endl;
 
+	BufferParams const & params = cur.buffer().params();
 
-void LyXText::clearSelection()
-{
-	TextCursor::clearSelection();
+	// Don't use forwardChar here as posend might have
+	// pos() == lastpos() and forwardChar would miss it.
+	for (; pos != posend; pos.forwardPos()) {
+		if (pos.pos() != pos.lastpos()) {
+			LyXFont f = getFont(pos.par(), pos.pos());
+			f.update(font, params.language, toggleall);
+			setCharFont(pos.par(), pos.pos(), f);
+		}
+	}
 
-	// reset this in the bv()!
-	if (bv() && bv()->text)
-		bv()->text->xsel_cache.set(false);
+	redoParagraphs(beg, end + 1);
 }
 
 
-void LyXText::cursorHome()
+// the cursor set functions have a special mechanism. When they
+// realize you left an empty paragraph, they will delete it.
+
+void LyXText::cursorHome(LCursor & cur)
 {
-	ParagraphList::iterator cpit = cursorPar();
-	setCursor(cpit, cpit->getRow(cursor.pos())->pos());
+	BOOST_ASSERT(this == cur.text());
+	setCursor(cur, cur.par(), cur.textRow().pos());
 }
 
 
-void LyXText::cursorEnd()
+void LyXText::cursorEnd(LCursor & cur)
 {
-	ParagraphList::iterator cpit = cursorPar();
-	pos_type end = cpit->getRow(cursor.pos())->endpos();
+	BOOST_ASSERT(this == cur.text());
 	// if not on the last row of the par, put the cursor before
 	// the final space
-	setCursor(cpit, end == cpit->size() ? end : end - 1);
+	pos_type const end = cur.textRow().endpos();
+	setCursor(cur, cur.par(), end == cur.lastpos() ? end : end - 1);
 }
 
 
-void LyXText::cursorTop()
+void LyXText::cursorTop(LCursor & cur)
 {
-	setCursor(ownerParagraphs().begin(), 0);
+	BOOST_ASSERT(this == cur.text());
+	setCursor(cur, 0, 0);
 }
 
 
-void LyXText::cursorBottom()
+void LyXText::cursorBottom(LCursor & cur)
 {
-	ParagraphList::iterator lastpit =
-		boost::prior(ownerParagraphs().end());
-	setCursor(lastpit, lastpit->size());
+	BOOST_ASSERT(this == cur.text());
+	setCursor(cur, cur.lastpar(), boost::prior(paragraphs().end())->size());
 }
 
 
-void LyXText::toggleFree(LyXFont const & font, bool toggleall)
+void LyXText::toggleFree(LCursor & cur, LyXFont const & font, bool toggleall)
 {
+	BOOST_ASSERT(this == cur.text());
 	// If the mask is completely neutral, tell user
 	if (font == LyXFont(LyXFont::ALL_IGNORE)) {
 		// Could only happen with user style
-		bv()->owner()->message(_("No font change defined. Use Character under the Layout menu to define font change."));
+		cur.message(_("No font change defined. "
+			"Use Character under the Layout menu to define font change."));
 		return;
 	}
 
 	// Try implicit word selection
 	// If there is a change in the language the implicit word selection
 	// is disabled.
-	LyXCursor resetCursor = cursor;
+	CursorSlice resetCursor = cur.top();
 	bool implicitSelection =
 		font.language() == ignore_language
 		&& font.number() == LyXFont::IGNORE
-		&& selectWordWhenUnderCursor(lyx::WHOLE_WORD_STRICT);
+		&& selectWordWhenUnderCursor(cur, lyx::WHOLE_WORD_STRICT);
 
 	// Set font
-	setFont(font, toggleall);
+	setFont(cur, font, toggleall);
 
 	// Implicit selections are cleared afterwards
-	//and cursor is set to the original position.
+	// and cursor is set to the original position.
 	if (implicitSelection) {
-		clearSelection();
-		cursor = resetCursor;
-		setCursor(cursorPar(), cursor.pos());
-		selection.cursor = cursor;
+		cur.clearSelection();
+		cur.top() = resetCursor;
+		cur.resetAnchor();
 	}
 }
 
 
-string LyXText::getStringToIndex()
+string LyXText::getStringToIndex(LCursor & cur)
 {
+	BOOST_ASSERT(this == cur.text());
 	// Try implicit word selection
 	// If there is a change in the language the implicit word selection
 	// is disabled.
-	LyXCursor const reset_cursor = cursor;
+	CursorSlice const reset_cursor = cur.top();
 	bool const implicitSelection =
-		selectWordWhenUnderCursor(lyx::PREVIOUS_WORD);
+		selectWordWhenUnderCursor(cur, lyx::PREVIOUS_WORD);
 
 	string idxstring;
-	if (!selection.set())
-		bv()->owner()->message(_("Nothing to index!"));
-	else if (selection.start.par() != selection.end.par())
-		bv()->owner()->message(_("Cannot index more than one paragraph!"));
+	if (!cur.selection())
+		cur.message(_("Nothing to index!"));
+	else if (cur.selBegin().par() != cur.selEnd().par())
+		cur.message(_("Cannot index more than one paragraph!"));
 	else
-		idxstring = selectionAsString(*bv()->buffer(), false);
+		idxstring = cur.selectionAsString(false);
 
 	// Reset cursors to their original position.
-	cursor = reset_cursor;
-	setCursor(cursorPar(), cursor.pos());
-	selection.cursor = cursor;
+	cur.top() = reset_cursor;
+	cur.resetAnchor();
 
 	// Clear the implicit selection.
 	if (implicitSelection)
-		clearSelection();
+		cur.clearSelection();
 
 	return idxstring;
 }
 
 
-// the DTP switches for paragraphs. LyX will store them in the first
-// physical paragraph. When a paragraph is broken, the top settings rest,
-// the bottom settings are given to the new one. So I can make sure,
-// they do not duplicate themself and you cannot play dirty tricks with
-// them!
-
-void LyXText::setParagraph(
-			   VSpace const & space_top,
-			   VSpace const & space_bottom,
-			   Spacing const & spacing,
-			   LyXAlignment align,
-			   string const & labelwidthstring,
-			   bool noindent)
+void LyXText::setParagraph(LCursor & cur,
+	Spacing const & spacing, LyXAlignment align,
+	string const & labelwidthstring, bool noindent)
 {
-	LyXCursor tmpcursor = cursor;
-	if (!selection.set()) {
-		selection.start = cursor;
-		selection.end = cursor;
-	}
-
+	BOOST_ASSERT(cur.text());
 	// make sure that the depth behind the selection are restored, too
-	ParagraphList::iterator endpit = boost::next(getPar(selection.end));
-	ParagraphList::iterator undoendpit = endpit;
-	ParagraphList::iterator pars_end = ownerParagraphs().end();
-
-	if (endpit != pars_end && endpit->getDepth()) {
-		while (endpit != pars_end && endpit->getDepth()) {
-			++endpit;
-			undoendpit = endpit;
-		}
-	} else if (endpit != pars_end) {
-		// because of parindents etc.
-		++endpit;
-	}
+	par_type undopit = undoSpan(cur.selEnd().par());
+	recUndo(cur.selBegin().par(), undopit - 1);
 
-	recUndo(selection.start.par(), parOffset(undoendpit) - 1);
-
-	int tmppit = selection.end.par();
-
-	while (tmppit != selection.start.par() - 1) {
-		setCursor(tmppit, 0);
-
-		ParagraphList::iterator const pit = cursorPar();
-		ParagraphParameters & params = pit->params();
-		params.spaceTop(space_top);
-		params.spaceBottom(space_bottom);
+	for (par_type pit = cur.selBegin().par(), end = cur.selEnd().par();
+			pit <= end; ++pit) {
+		Paragraph & par = pars_[pit];
+		ParagraphParameters & params = par.params();
 		params.spacing(spacing);
 
 		// does the layout allow the new alignment?
-		LyXLayout_ptr const & layout = pit->layout();
+		LyXLayout_ptr const & layout = par.layout();
 
 		if (align == LYX_ALIGN_LAYOUT)
 			align = layout->align;
@@ -711,25 +559,14 @@ void LyXText::setParagraph(
 			else
 				params.align(align);
 		}
-		pit->setLabelWidthString(labelwidthstring);
+		par.setLabelWidthString(labelwidthstring);
 		params.noindent(noindent);
-		--tmppit;
 	}
 
-	redoParagraphs(getPar(selection.start), endpit);
-
-	clearSelection();
-	setCursor(selection.start.par(), selection.start.pos());
-	selection.cursor = cursor;
-	setCursor(selection.end.par(), selection.end.pos());
-	setSelection();
-	setCursor(tmpcursor.par(), tmpcursor.pos());
-	bv()->update();
+	redoParagraphs(cur.selBegin().par(), undopit);
 }
 
 
-namespace {
-
 string expandLabel(LyXTextClass const & textclass,
 	LyXLayout_ptr const & layout, bool appendix)
 {
@@ -752,34 +589,34 @@ string expandLabel(LyXTextClass const & textclass,
 }
 
 
-void incrementItemDepth(ParagraphList::iterator pit,
-			ParagraphList::iterator first_pit)
+namespace {
+
+void incrementItemDepth(ParagraphList & pars, par_type pit, par_type first_pit)
 {
-	int const cur_labeltype = pit->layout()->labeltype;
+	int const cur_labeltype = pars[pit].layout()->labeltype;
 
-	if (cur_labeltype != LABEL_ENUMERATE &&
-	    cur_labeltype != LABEL_ITEMIZE)
+	if (cur_labeltype != LABEL_ENUMERATE && cur_labeltype != LABEL_ITEMIZE)
 		return;
 
-	int const cur_depth = pit->getDepth();
+	int const cur_depth = pars[pit].getDepth();
 
-	ParagraphList::iterator prev_pit = boost::prior(pit);
+	par_type prev_pit = pit - 1;
 	while (true) {
-		int const prev_depth = prev_pit->getDepth();
-		int const prev_labeltype = prev_pit->layout()->labeltype;
+		int const prev_depth = pars[prev_pit].getDepth();
+		int const prev_labeltype = pars[prev_pit].layout()->labeltype;
 		if (prev_depth == 0 && cur_depth > 0) {
 			if (prev_labeltype == cur_labeltype) {
-				pit->itemdepth = prev_pit->itemdepth + 1;
+				pars[pit].itemdepth = pars[prev_pit].itemdepth + 1;
 			}
 			break;
 		} else if (prev_depth < cur_depth) {
 			if (prev_labeltype == cur_labeltype) {
-				pit->itemdepth = prev_pit->itemdepth + 1;
+				pars[pit].itemdepth = pars[prev_pit].itemdepth + 1;
 				break;
 			}
 		} else if (prev_depth == cur_depth) {
 			if (prev_labeltype == cur_labeltype) {
-				pit->itemdepth = prev_pit->itemdepth;
+				pars[pit].itemdepth = pars[prev_pit].itemdepth;
 				break;
 			}
 		}
@@ -791,21 +628,20 @@ void incrementItemDepth(ParagraphList::iterator pit,
 }
 
 
-void resetEnumCounterIfNeeded(ParagraphList::iterator pit,
-			      ParagraphList::iterator firstpit,
-			      Counters & counters)
+void resetEnumCounterIfNeeded(ParagraphList & pars, par_type pit,
+	par_type firstpit, Counters & counters)
 {
 	if (pit == firstpit)
 		return;
 
-	int const cur_depth = pit->getDepth();
-	ParagraphList::iterator prev_pit = boost::prior(pit);
+	int const cur_depth = pars[pit].getDepth();
+	par_type prev_pit = pit - 1;
 	while (true) {
-		int const prev_depth = prev_pit->getDepth();
-		int const prev_labeltype = prev_pit->layout()->labeltype;
+		int const prev_depth = pars[prev_pit].getDepth();
+		int const prev_labeltype = pars[prev_pit].layout()->labeltype;
 		if (prev_depth <= cur_depth) {
 			if (prev_labeltype != LABEL_ENUMERATE) {
-				switch (pit->itemdepth) {
+				switch (pars[pit].itemdepth) {
 				case 0:
 					counters.reset("enumi");
 				case 1:
@@ -830,39 +666,39 @@ void resetEnumCounterIfNeeded(ParagraphList::iterator pit,
 
 
 // set the counter of a paragraph. This includes the labels
-void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
+void LyXText::setCounter(Buffer const & buf, par_type pit)
 {
 	BufferParams const & bufparams = buf.params();
 	LyXTextClass const & textclass = bufparams.getLyXTextClass();
-	LyXLayout_ptr const & layout = pit->layout();
-	ParagraphList::iterator first_pit = ownerParagraphs().begin();
+	LyXLayout_ptr const & layout = pars_[pit].layout();
+	par_type first_pit = 0;
 	Counters & counters = textclass.counters();
 
 	// Always reset
-	pit->itemdepth = 0;
+	pars_[pit].itemdepth = 0;
 
 	if (pit == first_pit) {
-		pit->params().appendix(pit->params().startOfAppendix());
+		pars_[pit].params().appendix(pars_[pit].params().startOfAppendix());
 	} else {
-		pit->params().appendix(boost::prior(pit)->params().appendix());
-		if (!pit->params().appendix() &&
-		    pit->params().startOfAppendix()) {
-			pit->params().appendix(true);
+		pars_[pit].params().appendix(pars_[pit - 1].params().appendix());
+		if (!pars_[pit].params().appendix() &&
+		    pars_[pit].params().startOfAppendix()) {
+			pars_[pit].params().appendix(true);
 			textclass.counters().reset();
 		}
 
 		// Maybe we have to increment the item depth.
-		incrementItemDepth(pit, first_pit);
+		incrementItemDepth(pars_, pit, first_pit);
 	}
 
 	// erase what was there before
-	pit->params().labelString(string());
+	pars_[pit].params().labelString(string());
 
 	if (layout->margintype == MARGIN_MANUAL) {
-		if (pit->params().labelWidthString().empty())
-			pit->setLabelWidthString(layout->labelstring());
+		if (pars_[pit].params().labelWidthString().empty())
+			pars_[pit].setLabelWidthString(layout->labelstring());
 	} else {
-		pit->setLabelWidthString(string());
+		pars_[pit].setLabelWidthString(string());
 	}
 
 	// is it a layout that has an automatic label?
@@ -870,16 +706,16 @@ void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 		BufferParams const & bufparams = buf.params();
 		LyXTextClass const & textclass = bufparams.getLyXTextClass();
 		counters.step(layout->counter);
-		string label = expandLabel(textclass, layout, pit->params().appendix());
-		pit->params().labelString(label);
+		string label = expandLabel(textclass, layout, pars_[pit].params().appendix());
+		pars_[pit].params().labelString(label);
 	} else if (layout->labeltype == LABEL_ITEMIZE) {
 		// At some point of time we should do something more
 		// clever here, like:
-		//   pit->params().labelString(
-		//    bufparams.user_defined_bullet(pit->itemdepth).getText());
+		//   pars_[pit].params().labelString(
+		//    bufparams.user_defined_bullet(pars_[pit].itemdepth).getText());
 		// for now, use a simple hardcoded label
 		string itemlabel;
-		switch (pit->itemdepth) {
+		switch (pars_[pit].itemdepth) {
 		case 0:
 			itemlabel = "*";
 			break;
@@ -894,17 +730,17 @@ void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 			break;
 		}
 
-		pit->params().labelString(itemlabel);
+		pars_[pit].params().labelString(itemlabel);
 	} else if (layout->labeltype == LABEL_ENUMERATE) {
 		// Maybe we have to reset the enumeration counter.
-		resetEnumCounterIfNeeded(pit, first_pit, counters);
+		resetEnumCounterIfNeeded(pars_, pit, first_pit, counters);
 
 		// FIXME
 		// Yes I know this is a really, really! bad solution
 		// (Lgb)
 		string enumcounter = "enum";
 
-		switch (pit->itemdepth) {
+		switch (pars_[pit].itemdepth) {
 		case 2:
 			enumcounter += 'i';
 		case 1:
@@ -922,13 +758,13 @@ void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 
 		counters.step(enumcounter);
 
-		pit->params().labelString(counters.enumLabel(enumcounter));
+		pars_[pit].params().labelString(counters.enumLabel(enumcounter));
 	} else if (layout->labeltype == LABEL_BIBLIO) {// ale970302
 		counters.step("bibitem");
 		int number = counters.value("bibitem");
-		if (pit->bibitem()) {
-			pit->bibitem()->setCounter(number);
-			pit->params().labelString(layout->labelstring());
+		if (pars_[pit].bibitem()) {
+			pars_[pit].bibitem()->setCounter(number);
+			pars_[pit].params().labelString(layout->labelstring());
 		}
 		// In biblio should't be following counters but...
 	} else {
@@ -936,23 +772,21 @@ void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 
 		// the caption hack:
 		if (layout->labeltype == LABEL_SENSITIVE) {
-			ParagraphList::iterator end = ownerParagraphs().end();
-			ParagraphList::iterator tmppit = pit;
-			InsetOld * in = 0;
+			par_type end = paragraphs().size();
+			par_type tmppit = pit;
+			InsetBase * in = 0;
 			bool isOK = false;
-			while (tmppit != end && tmppit->inInset()
-			       // the single '=' is intended below
-			       && (in = tmppit->inInset()->owner()))
-			{
-				if (in->lyxCode() == InsetOld::FLOAT_CODE ||
-				    in->lyxCode() == InsetOld::WRAP_CODE) {
+			while (tmppit != end) {
+				in = pars_[tmppit].inInset();
+				if (in->lyxCode() == InsetBase::FLOAT_CODE ||
+				    in->lyxCode() == InsetBase::WRAP_CODE) {
 					isOK = true;
 					break;
 				} else {
 					Paragraph const * owner = &ownerPar(buf, in);
 					tmppit = first_pit;
 					for ( ; tmppit != end; ++tmppit)
-						if (&*tmppit == owner)
+						if (&pars_[tmppit] == owner)
 							break;
 				}
 			}
@@ -960,9 +794,9 @@ void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 			if (isOK) {
 				string type;
 
-				if (in->lyxCode() == InsetOld::FLOAT_CODE)
+				if (in->lyxCode() == InsetBase::FLOAT_CODE)
 					type = static_cast<InsetFloat*>(in)->params().type;
-				else if (in->lyxCode() == InsetOld::WRAP_CODE)
+				else if (in->lyxCode() == InsetBase::WRAP_CODE)
 					type = static_cast<InsetWrap*>(in)->params().type;
 				else
 					BOOST_ASSERT(false);
@@ -979,274 +813,85 @@ void LyXText::setCounter(Buffer const & buf, ParagraphList::iterator pit)
 				s = _("Senseless: ");
 			}
 		}
-		pit->params().labelString(s);
+		pars_[pit].params().labelString(s);
 
 	}
 }
 
 
-// Updates all counters. Paragraphs with changed label string will be rebroken
+// Updates all counters.
 void LyXText::updateCounters()
 {
 	// start over
 	bv()->buffer()->params().getLyXTextClass().counters().reset();
 
-	ParagraphList::iterator beg = ownerParagraphs().begin();
-	ParagraphList::iterator end = ownerParagraphs().end();
-	for (ParagraphList::iterator pit = beg; pit != end; ++pit) {
-		string const oldLabel = pit->params().labelString();
+	bool update_pos = false;
 
+	par_type end = paragraphs().size();
+	for (par_type pit = 0; pit != end; ++pit) {
+		string const oldLabel = pars_[pit].params().labelString();
 		size_t maxdepth = 0;
-		if (pit != beg)
-			maxdepth = boost::prior(pit)->getMaxDepthAfter();
+		if (pit != 0)
+			maxdepth = pars_[pit - 1].getMaxDepthAfter();
 
-		if (pit->params().depth() > maxdepth)
-			pit->params().depth(maxdepth);
+		if (pars_[pit].params().depth() > maxdepth)
+			pars_[pit].params().depth(maxdepth);
 
 		// setCounter can potentially change the labelString.
 		setCounter(*bv()->buffer(), pit);
-
-		string const & newLabel = pit->params().labelString();
-
-		if (oldLabel != newLabel)
-			redoParagraph(pit);
-	}
-}
-
-
-void LyXText::insertInset(InsetOld * inset)
-{
-	if (!cursorPar()->insetAllowed(inset->lyxCode()))
-		return;
-
-	recUndo(cursor.par());
-	freezeUndo();
-	cursorPar()->insertInset(cursor.pos(), inset);
-	// Just to rebreak and refresh correctly.
-	// The character will not be inserted a second time
-	insertChar(Paragraph::META_INSET);
-	// If we enter a highly editable inset the cursor should be before
-	// the inset. After an Undo LyX tries to call inset->edit(...)
-	// and fails if the cursor is behind the inset and getInset
-	// does not return the inset!
-	if (isHighlyEditableInset(inset))
-		cursorLeft(true);
-	
-	unFreezeUndo();
-}
-
-
-void LyXText::cutSelection(bool doclear, bool realcut)
-{
-	// Stuff what we got on the clipboard. Even if there is no selection.
-
-	// There is a problem with having the stuffing here in that the
-	// larger the selection the slower LyX will get. This can be
-	// solved by running the line below only when the selection has
-	// finished. The solution used currently just works, to make it
-	// faster we need to be more clever and probably also have more
-	// calls to stuffClipboard. (Lgb)
-	bv()->stuffClipboard(selectionAsString(*bv()->buffer(), true));
-
-	// This doesn't make sense, if there is no selection
-	if (!selection.set())
-		return;
-
-	// OK, we have a selection. This is always between selection.start
-	// and selection.end
-
-	// make sure that the depth behind the selection are restored, too
-	ParagraphList::iterator endpit = boost::next(getPar(selection.end.par()));
-	ParagraphList::iterator undoendpit = endpit;
-	ParagraphList::iterator pars_end = ownerParagraphs().end();
-
-	if (endpit != pars_end && endpit->getDepth()) {
-		while (endpit != pars_end && endpit->getDepth()) {
-			++endpit;
-			undoendpit = endpit;
+		string const & newLabel = pars_[pit].params().labelString();
+		if (oldLabel != newLabel) {
+			//lyxerr << "changing labels: old: " << oldLabel << " new: "
+			//	<< newLabel << endl;
+			redoParagraphInternal(pit);
+			update_pos = true;
 		}
-	} else if (endpit != pars_end) {
-		// because of parindents etc.
-		++endpit;
 	}
-
-	recUndo(selection.start.par(), parOffset(undoendpit) - 1);
-
-	endpit = getPar(selection.end.par());
-	int endpos = selection.end.pos();
-
-	BufferParams const & bufparams = bv()->buffer()->params();
-	boost::tie(endpit, endpos) = realcut ?
-		CutAndPaste::cutSelection(bufparams,
-					  ownerParagraphs(),
-					  getPar(selection.start.par()), endpit,
-					  selection.start.pos(), endpos,
-					  bufparams.textclass,
-					  doclear)
-		: CutAndPaste::eraseSelection(bufparams,
-					      ownerParagraphs(),
-					      getPar(selection.start.par()), endpit,
-					      selection.start.pos(), endpos,
-					      doclear);
-	// sometimes necessary
-	if (doclear)
-		getPar(selection.start.par())->stripLeadingSpaces();
-
-	redoParagraphs(getPar(selection.start.par()), boost::next(endpit));
-	// cutSelection can invalidate the cursor so we need to set
-	// it anew. (Lgb)
-	// we prefer the end for when tracking changes
-	cursor.pos(endpos);
-	cursor.par(parOffset(endpit));
-
-	// need a valid cursor. (Lgb)
-	clearSelection();
-
-	setCursor(cursorPar(), cursor.pos());
-	selection.cursor = cursor;
-	updateCounters();
-}
-
-
-void LyXText::copySelection()
-{
-	// stuff the selection onto the X clipboard, from an explicit copy request
-	bv()->stuffClipboard(selectionAsString(*bv()->buffer(), true));
-
-	// this doesnt make sense, if there is no selection
-	if (!selection.set())
-		return;
-
-	// ok we have a selection. This is always between selection.start
-	// and sel_end cursor
-
-	// copy behind a space if there is one
-	while (getPar(selection.start)->size() > selection.start.pos()
-	       && getPar(selection.start)->isLineSeparator(selection.start.pos())
-	       && (selection.start.par() != selection.end.par()
-		   || selection.start.pos() < selection.end.pos()))
-		selection.start.pos(selection.start.pos() + 1);
-
-	CutAndPaste::copySelection(getPar(selection.start.par()),
-				   getPar(selection.end.par()),
-				   selection.start.pos(), selection.end.pos(),
-				   bv()->buffer()->params().textclass);
-}
-
-
-void LyXText::pasteSelection(size_t sel_index)
-{
-	// this does not make sense, if there is nothing to paste
-	if (!CutAndPaste::checkPastePossible())
-		return;
-
-	recUndo(cursor.par());
-
-	ParagraphList::iterator endpit;
-	PitPosPair ppp;
-
-	ErrorList el;
-
-	boost::tie(ppp, endpit) =
-		CutAndPaste::pasteSelection(*bv()->buffer(),
-					    ownerParagraphs(),
-					    cursorPar(), cursor.pos(),
-					    bv()->buffer()->params().textclass,
-					    sel_index, el);
-	bufferErrors(*bv()->buffer(), el);
-	bv()->showErrorList(_("Paste"));
-
-	redoParagraphs(cursorPar(), endpit);
-
-	setCursor(cursor.par(), cursor.pos());
-	clearSelection();
-
-	selection.cursor = cursor;
-	setCursor(ppp.first, ppp.second);
-	setSelection();
-	updateCounters();
-}
-
-
-void LyXText::setSelectionRange(lyx::pos_type length)
-{
-	if (!length)
-		return;
-
-	selection.cursor = cursor;
-	while (length--)
-		cursorRight(true);
-	setSelection();
+	if (update_pos)
+		updateParPositions();
 }
 
 
-// simple replacing. The font of the first selected character is used
-void LyXText::replaceSelectionWithString(string const & str)
+void LyXText::insertInset(LCursor & cur, InsetBase * inset)
 {
-	recUndo(cursor.par());
-	freezeUndo();
-
-	if (!selection.set()) { // create a dummy selection
-		selection.end = cursor;
-		selection.start = cursor;
-	}
-
-	// Get font setting before we cut
-	pos_type pos = selection.end.pos();
-	LyXFont const font = getPar(selection.start)
-		->getFontSettings(bv()->buffer()->params(),
-				  selection.start.pos());
-
-	// Insert the new string
-	string::const_iterator cit = str.begin();
-	string::const_iterator end = str.end();
-	for (; cit != end; ++cit) {
-		getPar(selection.end)->insertChar(pos, (*cit), font);
-		++pos;
-	}
-
-	// Cut the selection
-	cutSelection(true, false);
-
-	unFreezeUndo();
+	BOOST_ASSERT(this == cur.text());
+	BOOST_ASSERT(inset);
+	cur.paragraph().insertInset(cur.pos(), inset);
+	redoParagraph(cur);
 }
 
 
 // needed to insert the selection
-void LyXText::insertStringAsLines(string const & str)
+void LyXText::insertStringAsLines(LCursor & cur, string const & str)
 {
-	ParagraphList::iterator pit = cursorPar();
-	pos_type pos = cursor.pos();
-	ParagraphList::iterator endpit = boost::next(cursorPar());
-
-	recUndo(cursor.par());
+	par_type pit = cur.par();
+	par_type endpit = cur.par() + 1;
+	pos_type pos = cur.pos();
+	recordUndo(cur);
 
 	// only to be sure, should not be neccessary
-	clearSelection();
+	cur.clearSelection();
+	cur.buffer().insertStringAsLines(pars_, pit, pos, current_font, str);
 
-	bv()->buffer()->insertStringAsLines(pit, pos, current_font, str);
-
-	redoParagraphs(cursorPar(), endpit);
-	setCursor(cursorPar(), cursor.pos());
-	selection.cursor = cursor;
-	setCursor(pit, pos);
-	setSelection();
+	redoParagraphs(cur.par(), endpit);
+	cur.resetAnchor();
+	setCursor(cur, cur.par(), pos);
+	cur.setSelection();
 }
 
 
-// turns double-CR to single CR, others where converted into one
-// blank. Then InsertStringAsLines is called
-void LyXText::insertStringAsParagraphs(string const & str)
+// turn double CR to single CR, others are converted into one
+// blank. Then insertStringAsLines is called
+void LyXText::insertStringAsParagraphs(LCursor & cur, string const & str)
 {
-	string linestr(str);
+	string linestr = str;
 	bool newline_inserted = false;
-	string::size_type const siz = linestr.length();
 
-	for (string::size_type i = 0; i < siz; ++i) {
+	for (string::size_type i = 0, siz = linestr.size(); i < siz; ++i) {
 		if (linestr[i] == '\n') {
 			if (newline_inserted) {
 				// we know that \r will be ignored by
-				// InsertStringA. Of course, it is a dirty
+				// insertStringAsLines. Of course, it is a dirty
 				// trick, but it works...
 				linestr[i - 1] = '\r';
 				linestr[i] = '\n';
@@ -1258,189 +903,111 @@ void LyXText::insertStringAsParagraphs(string const & str)
 			newline_inserted = false;
 		}
 	}
-	insertStringAsLines(linestr);
-}
-
-
-void LyXText::setCursor(ParagraphList::iterator pit, pos_type pos)
-{
-	setCursor(parOffset(pit), pos);
-}
-
-
-bool LyXText::setCursor(paroffset_type par, pos_type pos, bool setfont, bool boundary)
-{
-	LyXCursor old_cursor = cursor;
-	setCursorIntern(par, pos, setfont, boundary);
-	return deleteEmptyParagraphMechanism(old_cursor);
+	insertStringAsLines(cur, linestr);
 }
 
 
-void LyXText::redoCursor()
+bool LyXText::setCursor(LCursor & cur, par_type par, pos_type pos,
+	bool setfont, bool boundary)
 {
-#warning maybe the same for selections?
-	setCursor(cursor, cursor.par(), cursor.pos(), cursor.boundary());
+	LCursor old = cur;
+	setCursorIntern(cur, par, pos, setfont, boundary);
+	return deleteEmptyParagraphMechanism(cur, old);
 }
 
 
-void LyXText::setCursor(LyXCursor & cur, paroffset_type par,
+void LyXText::setCursor(CursorSlice & cur, par_type par,
 	pos_type pos, bool boundary)
 {
-	BOOST_ASSERT(par != int(ownerParagraphs().size()));
+	BOOST_ASSERT(par != int(paragraphs().size()));
 
-	cur.par(par);
-	cur.pos(pos);
-	cur.boundary(boundary);
+	cur.par() = par;
+	cur.pos() = pos;
+	cur.boundary() = boundary;
 
 	// no rows, no fun...
-	if (ownerParagraphs().begin()->rows.empty())
+	if (paragraphs().begin()->rows.empty())
 		return;
 
-	// get the cursor y position in text
-
-	ParagraphList::iterator pit = getPar(par);
-	Row const & row = *pit->getRow(pos);
-	int y = pit->y + row.y_offset();
-
-	// y is now the beginning of the cursor row
-	y += row.baseline();
-	// y is now the cursor baseline
-	cur.y(y);
-
+	// now some strict checking
+	Paragraph & para = getPar(par);
+	Row const & row = *para.getRow(pos);
 	pos_type const end = row.endpos();
 
 	// None of these should happen, but we're scaredy-cats
 	if (pos < 0) {
 		lyxerr << "dont like -1" << endl;
-		pos = 0;
-		cur.pos(0);
 		BOOST_ASSERT(false);
-	} else if (pos > pit->size()) {
+	}
+
+	if (pos > para.size()) {
 		lyxerr << "dont like 1, pos: " << pos
-		       << " size: " << pit->size()
+		       << " size: " << para.size()
 		       << " row.pos():" << row.pos()
-		       << " paroffset: " << par << endl;
-		pos = 0;
-		cur.pos(0);
+		       << " par: " << par << endl;
 		BOOST_ASSERT(false);
-	} else if (pos > end) {
-		lyxerr << "dont like 2 please report" << endl;
+	}
+
+	if (pos > end) {
+		lyxerr << "dont like 2, pos: " << pos
+		       << " size: " << para.size()
+		       << " row.pos():" << row.pos()
+		       << " par: " << par << endl;
 		// This shouldn't happen.
-		pos = end;
-		cur.pos(pos);
 		BOOST_ASSERT(false);
-	} else if (pos < row.pos()) {
+	}
+
+	if (pos < row.pos()) {
 		lyxerr << "dont like 3 please report pos:" << pos
-		       << " size: " << pit->size()
+		       << " size: " << para.size()
 		       << " row.pos():" << row.pos()
-		       << " paroffset: " << par << endl;
-		pos = row.pos();
-		cur.pos(pos);
+		       << " par: " << par << endl;
 		BOOST_ASSERT(false);
 	}
-	// now get the cursors x position
-	cur.x(int(getCursorX(pit, row, pos, boundary)));
-}
-
-
-float LyXText::getCursorX(ParagraphList::iterator pit, Row const & row,
-			  pos_type pos, bool boundary) const
-{
-	pos_type cursor_vpos    = 0;
-	double x                = row.x();
-	double fill_separator   = row.fill_separator();
-	double fill_hfill       = row.fill_hfill();
-	double fill_label_hfill = row.fill_label_hfill();
-	pos_type const row_pos  = row.pos();
-	pos_type const end = row.endpos();
-
-	if (end <= row_pos)
-		cursor_vpos = row_pos;
-	else if (pos >= end && !boundary)
-		cursor_vpos = (pit->isRightToLeftPar(bv()->buffer()->params()))
-			? row_pos : end;
-	else if (pos > row_pos && (pos >= end || boundary))
-		// Place cursor after char at (logical) position pos - 1
-		cursor_vpos = (bidi.level(pos - 1) % 2 == 0)
-			? bidi.log2vis(pos - 1) + 1 : bidi.log2vis(pos - 1);
-	else
-		// Place cursor before char at (logical) position pos
-		cursor_vpos = (bidi.level(pos) % 2 == 0)
-			? bidi.log2vis(pos) : bidi.log2vis(pos) + 1;
-
-	pos_type body_pos = pit->beginOfBody();
-	if (body_pos > 0 &&
-	    (body_pos > end || !pit->isLineSeparator(body_pos - 1)))
-		body_pos = 0;
-
-	for (pos_type vpos = row_pos; vpos < cursor_vpos; ++vpos) {
-		pos_type pos = bidi.vis2log(vpos);
-		if (body_pos > 0 && pos == body_pos - 1) {
-			x += fill_label_hfill
-				+ font_metrics::width(pit->layout()->labelsep,
-						      getLabelFont(pit));
-			if (pit->isLineSeparator(body_pos - 1))
-				x -= singleWidth(pit, body_pos - 1);
-		}
-
-		if (hfillExpansion(*pit, row, pos)) {
-			x += singleWidth(pit, pos);
-			if (pos >= body_pos)
-				x += fill_hfill;
-			else
-				x += fill_label_hfill;
-		} else if (pit->isSeparator(pos)) {
-			x += singleWidth(pit, pos);
-			if (pos >= body_pos)
-				x += fill_separator;
-		} else
-			x += singleWidth(pit, pos);
-	}
-	return x;
 }
 
 
-void LyXText::setCursorIntern(paroffset_type par,
-			      pos_type pos, bool setfont, bool boundary)
+void LyXText::setCursorIntern(LCursor & cur,
+	par_type par, pos_type pos, bool setfont, bool boundary)
 {
-	setCursor(cursor, par, pos, boundary);
-	bv()->x_target(cursor.x() + x0_);
+	setCursor(cur.top(), par, pos, boundary);
+	cur.x_target() = cursorX(cur.top());
 	if (setfont)
-		setCurrentFont();
+		setCurrentFont(cur);
 }
 
 
-void LyXText::setCurrentFont()
+void LyXText::setCurrentFont(LCursor & cur)
 {
-	pos_type pos = cursor.pos();
-	ParagraphList::iterator pit = cursorPar();
+	BOOST_ASSERT(this == cur.text());
+	pos_type pos = cur.pos();
+	par_type pit = cur.par();
 
-	if (cursor.boundary() && pos > 0)
+	if (cur.boundary() && pos > 0)
 		--pos;
 
 	if (pos > 0) {
-		if (pos == pit->size())
+		if (pos == cur.lastpos())
 			--pos;
 		else // potentional bug... BUG (Lgb)
-			if (pit->isSeparator(pos)) {
-				if (pos > pit->getRow(pos)->pos() &&
+			if (pars_[pit].isSeparator(pos)) {
+				if (pos > cur.textRow().pos() &&
 				    bidi.level(pos) % 2 ==
 				    bidi.level(pos - 1) % 2)
 					--pos;
-				else if (pos + 1 < pit->size())
+				else if (pos + 1 < cur.lastpos())
 					++pos;
 			}
 	}
 
-	BufferParams const & bufparams = bv()->buffer()->params();
-	current_font = pit->getFontSettings(bufparams, pos);
+	BufferParams const & bufparams = cur.buffer().params();
+	current_font = pars_[pit].getFontSettings(bufparams, pos);
 	real_current_font = getFont(pit, pos);
 
-	if (cursor.pos() == pit->size() &&
-	    bidi.isBoundary(*bv()->buffer(), *pit, cursor.pos()) &&
-	    !cursor.boundary()) {
-		Language const * lang =
-			pit->getParLanguage(bufparams);
+	if (cur.pos() == cur.lastpos()
+	    && bidi.isBoundary(cur.buffer(), pars_[pit], cur.pos())
+	    && !cur.boundary()) {
+		Language const * lang = pars_[pit].getParLanguage(bufparams);
 		current_font.setLanguage(lang);
 		current_font.setNumber(LyXFont::OFF);
 		real_current_font.setLanguage(lang);
@@ -1449,34 +1016,34 @@ void LyXText::setCurrentFont()
 }
 
 
+// x is an absolute screen coord
 // returns the column near the specified x-coordinate of the row
 // x is set to the real beginning of this column
-pos_type LyXText::getColumnNearX(ParagraphList::iterator pit,
+pos_type LyXText::getColumnNearX(par_type pit,
 	Row const & row, int & x, bool & boundary) const
 {
-	double tmpx             = row.x();
-	double fill_separator   = row.fill_separator();
-	double fill_hfill       = row.fill_hfill();
-	double fill_label_hfill = row.fill_label_hfill();
+	x -= xo_;
+	RowMetrics const r = computeRowMetrics(pit, row);
 
 	pos_type vc = row.pos();
 	pos_type end = row.endpos();
 	pos_type c = 0;
-	LyXLayout_ptr const & layout = pit->layout();
+	LyXLayout_ptr const & layout = pars_[pit].layout();
 
 	bool left_side = false;
 
-	pos_type body_pos = pit->beginOfBody();
+	pos_type body_pos = pars_[pit].beginOfBody();
+
+	double tmpx = r.x;
 	double last_tmpx = tmpx;
 
 	if (body_pos > 0 &&
-	    (body_pos > end ||
-	     !pit->isLineSeparator(body_pos - 1)))
+	    (body_pos > end || !pars_[pit].isLineSeparator(body_pos - 1)))
 		body_pos = 0;
 
 	// check for empty row
 	if (vc == end) {
-		x = int(tmpx);
+		x = int(tmpx) + xo_;
 		return 0;
 	}
 
@@ -1484,22 +1051,22 @@ pos_type LyXText::getColumnNearX(ParagraphList::iterator pit,
 		c = bidi.vis2log(vc);
 		last_tmpx = tmpx;
 		if (body_pos > 0 && c == body_pos - 1) {
-			tmpx += fill_label_hfill +
+			tmpx += r.label_hfill +
 				font_metrics::width(layout->labelsep, getLabelFont(pit));
-			if (pit->isLineSeparator(body_pos - 1))
+			if (pars_[pit].isLineSeparator(body_pos - 1))
 				tmpx -= singleWidth(pit, body_pos - 1);
 		}
 
-		if (hfillExpansion(*pit, row, c)) {
+		if (hfillExpansion(pars_[pit], row, c)) {
 			tmpx += singleWidth(pit, c);
 			if (c >= body_pos)
-				tmpx += fill_hfill;
+				tmpx += r.hfill;
 			else
-				tmpx += fill_label_hfill;
-		} else if (pit->isSeparator(c)) {
+				tmpx += r.label_hfill;
+		} else if (pars_[pit].isSeparator(c)) {
 			tmpx += singleWidth(pit, c);
 			if (c >= body_pos)
-				tmpx += fill_separator;
+				tmpx += r.separator;
 		} else {
 			tmpx += singleWidth(pit, c);
 		}
@@ -1516,13 +1083,11 @@ pos_type LyXText::getColumnNearX(ParagraphList::iterator pit,
 	boundary = false;
 	// This (rtl_support test) is not needed, but gives
 	// some speedup if rtl_support == false
-	bool const lastrow = lyxrc.rtl_support && row.endpos() == pit->size();
+	bool const lastrow = lyxrc.rtl_support && row.endpos() == pars_[pit].size();
 
 	// If lastrow is false, we don't need to compute
 	// the value of rtl.
-	bool const rtl = (lastrow)
-		? pit->isRightToLeftPar(bv()->buffer()->params())
-		: false;
+	bool const rtl = lastrow ? isRTL(pars_[pit]) : false;
 	if (lastrow &&
 		 ((rtl  &&  left_side && vc == row.pos() && x < tmpx - 5) ||
 		  (!rtl && !left_side && vc == end  && x > tmpx + 5)))
@@ -1536,11 +1101,11 @@ pos_type LyXText::getColumnNearX(ParagraphList::iterator pit,
 		bool const rtl = (bidi.level(c) % 2 == 1);
 		if (left_side == rtl) {
 			++c;
-			boundary = bidi.isBoundary(*bv()->buffer(), *pit, c);
+			boundary = bidi.isBoundary(*bv()->buffer(), pars_[pit], c);
 		}
 	}
 
-	if (row.pos() < end && c >= end && pit->isNewline(end - 1)) {
+	if (row.pos() < end && c >= end && pars_[pit].isNewline(end - 1)) {
 		if (bidi.level(end -1) % 2 == 0)
 			tmpx -= singleWidth(pit, end - 1);
 		else
@@ -1548,256 +1113,193 @@ pos_type LyXText::getColumnNearX(ParagraphList::iterator pit,
 		c = end - 1;
 	}
 
-	c -= row.pos();
-	x = int(tmpx);
-	return c;
+	x = int(tmpx) + xo_;
+	return c - row.pos();
 }
 
 
-void LyXText::setCursorFromCoordinates(int x, int y)
+// x,y are absolute coordinates
+void LyXText::setCursorFromCoordinates(LCursor & cur, int x, int y)
 {
-	LyXCursor old_cursor = cursor;
-	setCursorFromCoordinates(cursor, x, y);
-	setCurrentFont();
-	deleteEmptyParagraphMechanism(old_cursor);
-}
-
-//gets LyXText coordinates
-void LyXText::setCursorFromCoordinates(LyXCursor & cur, int x, int y)
-{
-	// Get the row first.
-	ParagraphList::iterator pit;
+	x -= xo_;
+	y -= yo_;
+	par_type pit;
 	Row const & row = *getRowNearY(y, pit);
-	y = pit->y + row.y_offset();
-
+	lyxerr << "setCursorFromCoordinates:: hit row at: " << row.pos() << endl;
 	bool bound = false;
-	pos_type const column = getColumnNearX(pit, row, x, bound);
-	cur.par(parOffset(pit));
-	cur.pos(row.pos() + column);
-	cur.x(x);
-	cur.y(y + row.baseline());
-
-	cur.boundary(bound);
-}
-
-
-
-bool LyXText::checkAndActivateInset(bool front)
-{
-	if (cursor.pos() == cursorPar()->size())
-		return false;
-	InsetOld * inset = cursorPar()->getInset(cursor.pos());
-	if (!isHighlyEditableInset(inset))
-		return false;
-	inset->edit(bv(), front);
-	return true;
-}
-
-
-DispatchResult LyXText::moveRight()
-{
-	if (cursorPar()->isRightToLeftPar(bv()->buffer()->params()))
-		return moveLeftIntern(false, true, false);
-	else
-		return moveRightIntern(true, true, false);
-}
-
-
-DispatchResult LyXText::moveLeft()
-{
-	if (cursorPar()->isRightToLeftPar(bv()->buffer()->params()))
-		return moveRightIntern(true, true, false);
-	else
-		return moveLeftIntern(false, true, false);
+	int xx = x + xo_; // getRowNearX get absolute x coords
+	pos_type const pos = row.pos() + getColumnNearX(pit, row, xx, bound);
+	setCursor(cur, pit, pos, true, bound);
 }
 
 
-DispatchResult LyXText::moveRightIntern(bool front, bool activate_inset, bool selecting)
+// x,y are absolute screen coordinates
+InsetBase * LyXText::editXY(LCursor & cur, int x, int y)
 {
-	ParagraphList::iterator c_par = cursorPar();
-	if (boost::next(c_par) == ownerParagraphs().end()
-		&& cursor.pos() >= c_par->size())
-		return DispatchResult(false, FINISHED_RIGHT);
-	if (activate_inset && checkAndActivateInset(front))
-		return DispatchResult(true, true);
-	cursorRight(true);
-	if (!selecting)
-		clearSelection();
-	return DispatchResult(true);
-}
-
+	par_type pit;
+	Row const & row = *getRowNearY(y - yo_, pit);
+	bool bound = false;
 
-DispatchResult LyXText::moveLeftIntern(bool front,
-			  bool activate_inset, bool selecting)
-{
-	if (cursor.par() == 0 && cursor.pos() <= 0)
-		return DispatchResult(false, FINISHED);
-	cursorLeft(true);
-	if (!selecting)
-		clearSelection();
-	if (activate_inset && checkAndActivateInset(front))
-		return DispatchResult(true, true);
-	return DispatchResult(true);
-}
+	int xx = x; // is modified by getColumnNearX
+	pos_type const pos = row.pos() + getColumnNearX(pit, row, xx, bound);
+	cur.par() = pit;
+	cur.pos() = pos;
+	cur.boundary() = bound;
 
+	// try to descend into nested insets
+	InsetBase * inset = checkInsetHit(x, y);
+	lyxerr << "inset " << inset << " hit at x: " << x << " y: " << y << endl;
+	if (!inset)
+		return 0;
 
-DispatchResult LyXText::moveUp()
-{
-	if (cursorRow() == firstRow())
-		return DispatchResult(false, FINISHED_UP);
-	cursorUp(false);
-	clearSelection();
-	return DispatchResult(true);
+	// This should be just before or just behind the
+	// cursor position set above.
+	BOOST_ASSERT((pos != 0 && inset == pars_[pit].getInset(pos - 1))
+	             || inset == pars_[pit].getInset(pos));
+	// Make sure the cursor points to the position before
+	// this inset.
+	if (inset == pars_[pit].getInset(pos - 1))
+		--cur.pos();
+	return inset->editXY(cur, x, y);
 }
 
 
-DispatchResult LyXText::moveDown()
+bool LyXText::checkAndActivateInset(LCursor & cur, bool front)
 {
-	if (cursorRow() == lastRow())
-		return DispatchResult(false, FINISHED_DOWN);
-	cursorDown(false);
-	clearSelection();
-	return DispatchResult(true);
+	if (cur.selection())
+		return false;
+	if (cur.pos() == cur.lastpos())
+		return false;
+	InsetBase * inset = cur.nextInset();
+	if (!isHighlyEditableInset(inset))
+		return false;
+	inset->edit(cur, front);
+	return true;
 }
 
 
-bool LyXText::cursorLeft(bool internal)
+void LyXText::cursorLeft(LCursor & cur)
 {
-	if (cursor.pos() > 0) {
-		bool boundary = cursor.boundary();
-		setCursor(cursor.par(), cursor.pos() - 1, true, false);
-		if (!internal && !boundary &&
-		    bidi.isBoundary(*bv()->buffer(), *cursorPar(), cursor.pos() + 1))
-			setCursor(cursor.par(), cursor.pos() + 1, true, true);
-		return true;
+	if (cur.pos() != 0) {
+		bool boundary = cur.boundary();
+		setCursor(cur, cur.par(), cur.pos() - 1, true, false);
+		if (!checkAndActivateInset(cur, false)) {
+			if (false && !boundary &&
+					bidi.isBoundary(cur.buffer(), cur.paragraph(), cur.pos() + 1))
+				setCursor(cur, cur.par(), cur.pos() + 1, true, true);
+		}
+		return;
 	}
 
-	if (cursor.par() != 0) {
+	if (cur.par() != 0) {
 		// steps into the paragraph above
-		setCursor(cursor.par() - 1, boost::prior(cursorPar())->size());
-		return true;
+		setCursor(cur, cur.par() - 1, getPar(cur.par() - 1).size());
 	}
-
-	return false;
 }
 
 
-bool LyXText::cursorRight(bool internal)
+void LyXText::cursorRight(LCursor & cur)
 {
-	if (!internal && cursor.boundary()) {
-		setCursor(cursor.par(), cursor.pos(), true, false);
-		return true;
-	}
-
-	if (cursor.pos() != cursorPar()->size()) {
-		setCursor(cursor.par(), cursor.pos() + 1, true, false);
-		if (!internal && bidi.isBoundary(*bv()->buffer(), *cursorPar(),
-						 cursor.pos()))
-			setCursor(cursor.par(), cursor.pos(), true, true);
-		return true;
+	if (false && cur.boundary()) {
+		setCursor(cur, cur.par(), cur.pos(), true, false);
+		return;
 	}
 
-	if (cursor.par() + 1 != int(ownerParagraphs().size())) {
-		setCursor(cursor.par() + 1, 0);
-		return true;
+	if (cur.pos() != cur.lastpos()) {
+		if (!checkAndActivateInset(cur, true)) {
+			setCursor(cur, cur.par(), cur.pos() + 1, true, false);
+			if (false && bidi.isBoundary(cur.buffer(), cur.paragraph(),
+							 cur.pos()))
+				setCursor(cur, cur.par(), cur.pos(), true, true);
+		}
+		return;
 	}
 
-	return false;
+	if (cur.par() != cur.lastpar())
+		setCursor(cur, cur.par() + 1, 0);
 }
 
 
-void LyXText::cursorUp(bool selecting)
+void LyXText::cursorUp(LCursor & cur)
 {
-	ParagraphList::iterator cpit = cursorPar();
-	Row const & crow = *cpit->getRow(cursor.pos());
-	int x = bv()->x_target() - x0_;
-	int y = cursor.y() - crow.baseline() - 1;
-	setCursorFromCoordinates(x, y);
-	if (!selecting) {
-		y += y0_ - bv()->top_y();
-		lyxerr << "y:" << y << " y0: " << y0_ << endl;
-		InsetOld * inset_hit = checkInsetHit(bv()->x_target(), y);
+	Row const & row = cur.textRow();
+	int x = cur.x_target();
+	int y = cursorY(cur.top()) - row.baseline() - 1;
+	setCursorFromCoordinates(cur, x, y);
+
+	if (!cur.selection()) {
+		InsetBase * inset_hit = checkInsetHit(cur.x_target(), y);
 		if (inset_hit && isHighlyEditableInset(inset_hit))
-			inset_hit->edit(bv(), bv()->x_target(), y);
+			inset_hit->editXY(cur, cur.x_target(), y);
 	}
 }
 
 
-void LyXText::cursorDown(bool selecting)
+void LyXText::cursorDown(LCursor & cur)
 {
-	ParagraphList::iterator cpit = cursorPar();
-	Row const & crow = *cpit->getRow(cursor.pos());
-	int x = bv()->x_target() - x0_;
-	int y = cursor.y() - crow.baseline() + crow.height() + 1;
-	setCursorFromCoordinates(x, y);
-	if (!selecting) {
-		y += y0_ - bv()->top_y();
-		InsetOld * inset_hit = checkInsetHit(bv()->x_target(), y);
+	Row const & row = cur.textRow();
+	int x = cur.x_target();
+	int y = cursorY(cur.top()) - row.baseline() + row.height() + 1;
+	setCursorFromCoordinates(cur, x, y);
+
+	if (!cur.selection()) {
+		InsetBase * inset_hit = checkInsetHit(cur.x_target(), y);
 		if (inset_hit && isHighlyEditableInset(inset_hit))
-			inset_hit->edit(bv(), bv()->x_target(), y);
+			inset_hit->editXY(cur, cur.x_target(), y);
 	}
 }
 
 
-void LyXText::cursorUpParagraph()
+void LyXText::cursorUpParagraph(LCursor & cur)
 {
-	ParagraphList::iterator cpit = cursorPar();
-	if (cursor.pos() > 0)
-		setCursor(cpit, 0);
-	else if (cpit != ownerParagraphs().begin())
-		setCursor(boost::prior(cpit), 0);
+	if (cur.pos() > 0)
+		setCursor(cur, cur.par(), 0);
+	else if (cur.par() != 0)
+		setCursor(cur, cur.par() - 1, 0);
 }
 
 
-void LyXText::cursorDownParagraph()
+void LyXText::cursorDownParagraph(LCursor & cur)
 {
-	ParagraphList::iterator pit = cursorPar();
-	ParagraphList::iterator next_pit = boost::next(pit);
-
-	if (next_pit != ownerParagraphs().end())
-		setCursor(next_pit, 0);
+	if (cur.par() != cur.lastpar())
+		setCursor(cur, cur.par() + 1, 0);
 	else
-		setCursor(pit, pit->size());
+		setCursor(cur, cur.par(), cur.lastpos());
 }
 
 
 // fix the cursor `cur' after a characters has been deleted at `where'
 // position. Called by deleteEmptyParagraphMechanism
-void LyXText::fixCursorAfterDelete(LyXCursor & cur, LyXCursor const & where)
+void LyXText::fixCursorAfterDelete(CursorSlice & cur, CursorSlice const & where)
 {
-	// if cursor is not in the paragraph where the delete occured,
-	// do nothing
+	// do notheing if cursor is not in the paragraph where the
+	// deletion occured,
 	if (cur.par() != where.par())
 		return;
 
-	// if cursor position is after the place where the delete occured,
-	// update it
+	// if cursor position is after the deletion place update it
 	if (cur.pos() > where.pos())
-		cur.pos(cur.pos()-1);
+		--cur.pos();
 
 	// check also if we don't want to set the cursor on a spot behind the
 	// pagragraph because we erased the last character.
-	if (cur.pos() > getPar(cur)->size())
-		cur.pos(getPar(cur)->size());
-
-	// recompute row et al. for this cursor
-	setCursor(cur, cur.par(), cur.pos(), cur.boundary());
+	if (cur.pos() > cur.lastpos())
+		cur.pos() = cur.lastpos();
 }
 
 
-bool LyXText::deleteEmptyParagraphMechanism(LyXCursor const & old_cursor)
+bool LyXText::deleteEmptyParagraphMechanism(LCursor & cur, LCursor const & old)
 {
+	BOOST_ASSERT(cur.size() == old.size());
 	// Would be wrong to delete anything if we have a selection.
-	if (selection.set())
+	if (cur.selection())
 		return false;
 
-	// Don't do anything if the cursor is invalid
-	if (old_cursor.par() == -1)
-		return false;
+	//lyxerr << "DEPM: cur:\n" << cur << "old:\n" << old << endl;
+	Paragraph const & oldpar = pars_[old.par()];
 
 	// We allow all kinds of "mumbo-jumbo" when freespacing.
-	ParagraphList::iterator const old_pit = getPar(old_cursor);
-	if (old_pit->isFreeSpacing())
+	if (oldpar.isFreeSpacing())
 		return false;
 
 	/* Ok I'll put some comments here about what is missing.
@@ -1806,7 +1308,7 @@ bool LyXText::deleteEmptyParagraphMechanism(LyXCursor const & old_cursor)
 	   Copy and Paste to hopefully do some sensible things.
 	   There are still some small problems that can lead to
 	   double spaces stored in the document file or space at
-	   the beginning of paragraphs. This happens if you have
+	   the beginning of paragraphs(). This happens if you have
 	   the cursor between to spaces and then save. Or if you
 	   cut and paste and the selection have a space at the
 	   beginning and then save right after the paste. I am
@@ -1815,137 +1317,113 @@ bool LyXText::deleteEmptyParagraphMechanism(LyXCursor const & old_cursor)
 	   that I can get some feedback. (Lgb)
 	*/
 
-	// If old_cursor.pos() == 0 and old_cursor.pos()(1) == LineSeparator
+	// If old.pos() == 0 and old.pos()(1) == LineSeparator
 	// delete the LineSeparator.
 	// MISSING
 
-	// If old_cursor.pos() == 1 and old_cursor.pos()(0) == LineSeparator
+	// If old.pos() == 1 and old.pos()(0) == LineSeparator
 	// delete the LineSeparator.
 	// MISSING
 
-	// If the pos around the old_cursor were spaces, delete one of them.
-	if (old_cursor.par() != cursor.par()
-	    || old_cursor.pos() != cursor.pos()) {
-
-		// Only if the cursor has really moved
-		if (old_cursor.pos() > 0
-		    && old_cursor.pos() < old_pit->size()
-		    && old_pit->isLineSeparator(old_cursor.pos())
-		    && old_pit->isLineSeparator(old_cursor.pos() - 1)) {
-			bool erased = old_pit->erase(old_cursor.pos() - 1);
-			redoParagraph(old_pit);
+	// If the chars around the old cursor were spaces, delete one of them.
+	if (old.par() != cur.par() || old.pos() != cur.pos()) {
 
-			if (!erased)
-				return false;
+		// Only if the cursor has really moved.
+		if (old.pos() > 0
+		    && old.pos() < oldpar.size()
+		    && oldpar.isLineSeparator(old.pos())
+		    && oldpar.isLineSeparator(old.pos() - 1)) {
+			pars_[old.par()].erase(old.pos() - 1);
 #ifdef WITH_WARNINGS
 #warning This will not work anymore when we have multiple views of the same buffer
 // In this case, we will have to correct also the cursors held by
 // other bufferviews. It will probably be easier to do that in a more
-// automated way in LyXCursor code. (JMarc 26/09/2001)
+// automated way in CursorSlice code. (JMarc 26/09/2001)
 #endif
-			// correct all cursors held by the LyXText
-			fixCursorAfterDelete(cursor, old_cursor);
-			fixCursorAfterDelete(selection.cursor, old_cursor);
-			fixCursorAfterDelete(selection.start, old_cursor);
-			fixCursorAfterDelete(selection.end, old_cursor);
+			// correct all cursor parts
+			fixCursorAfterDelete(cur.top(), old.top());
+#warning DEPM, look here
+			//fixCursorAfterDelete(cur.anchor(), old.top());
 			return false;
 		}
 	}
 
-	// don't delete anything if this is the ONLY paragraph!
-	if (ownerParagraphs().size() == 1)
+	// only do our magic if we changed paragraph
+	if (old.par() == cur.par())
 		return false;
 
-	// Do not delete empty paragraphs with keepempty set.
-	if (old_pit->allowEmpty())
+	// don't delete anything if this is the ONLY paragraph!
+	if (pars_.size() == 1)
 		return false;
 
-	// only do our magic if we changed paragraph
-	if (old_cursor.par() == cursor.par())
+	// Do not delete empty paragraphs with keepempty set.
+	if (oldpar.allowEmpty())
 		return false;
 
 	// record if we have deleted a paragraph
 	// we can't possibly have deleted a paragraph before this point
 	bool deleted = false;
 
-	if (old_pit->empty()
-	    || (old_pit->size() == 1 && old_pit->isLineSeparator(0))) {
+	if (oldpar.empty() || (oldpar.size() == 1 && oldpar.isLineSeparator(0))) {
 		// ok, we will delete something
-		LyXCursor tmpcursor;
+		CursorSlice tmpcursor;
 
 		deleted = true;
 
 		bool selection_position_was_oldcursor_position =
-			selection.cursor.par() == old_cursor.par()
-			&& selection.cursor.pos() == old_cursor.pos();
+			cur.anchor().par() == old.par() && cur.anchor().pos() == old.pos();
 
-		tmpcursor = cursor;
-		cursor = old_cursor; // that undo can restore the right cursor position
+		// This is a bit of a overkill. We change the old and the cur par
+		// at max, certainly not everything in between...
+		recUndo(old.par(), cur.par());
 
-		ParagraphList::iterator endpit = boost::next(old_pit);
-		while (endpit != ownerParagraphs().end() && endpit->getDepth())
-			++endpit;
+		// Delete old par.
+		pars_.erase(pars_.begin() + old.par());
 
-		recUndo(parOffset(old_pit), parOffset(endpit) - 1);
-		cursor = tmpcursor;
-
-		// cache cursor pit
-		ParagraphList::iterator tmppit = cursorPar();
-		// delete old par
-		ownerParagraphs().erase(old_pit);
-		// update cursor par offset
-		cursor.par(parOffset(tmppit));
-		redoParagraph();
-
-		// correct cursor y
-		setCursorIntern(cursor.par(), cursor.pos());
+		// Update cursor par offset if necessary.
+		// Some 'iterator registration' would be nice that takes care of
+		// such events. Maybe even signal/slot?
+		if (cur.par() > old.par())
+			--cur.par();
+#warning DEPM, look here
+//		if (cur.anchor().par() > old.par())
+//			--cur.anchor().par();
 
 		if (selection_position_was_oldcursor_position) {
 			// correct selection
-			selection.cursor = cursor;
+			cur.resetAnchor();
 		}
 	}
 
 	if (deleted)
 		return true;
 
-	if (old_pit->stripLeadingSpaces()) {
-		redoParagraph(old_pit);
-		// correct cursor y
-		setCursorIntern(cursor.par(), cursor.pos());
-		selection.cursor = cursor;
-	}
-	return false;
-}
-
+	if (pars_[old.par()].stripLeadingSpaces())
+		cur.resetAnchor();
 
-ParagraphList & LyXText::ownerParagraphs() const
-{
-	return *paragraphs_;
+	return false;
 }
 
 
-void LyXText::recUndo(paroffset_type first, paroffset_type last) const
+ParagraphList & LyXText::paragraphs() const
 {
-	recordUndo(Undo::ATOMIC, this, first, last);
+	return const_cast<ParagraphList &>(pars_);
 }
 
 
-void LyXText::recUndo(lyx::paroffset_type par) const
+void LyXText::recUndo(par_type first, par_type last) const
 {
-	recordUndo(Undo::ATOMIC, this, par, par);
+	recordUndo(bv()->cursor(), Undo::ATOMIC, first, last);
 }
 
 
-bool LyXText::isInInset() const
+void LyXText::recUndo(par_type par) const
 {
-	// Sub-level has non-null bv owner and non-null inset owner.
-	return inset_owner != 0;
+	recordUndo(bv()->cursor(), Undo::ATOMIC, par, par);
 }
 
 
 int defaultRowHeight()
 {
-	LyXFont const font(LyXFont::ALL_SANE);
-	return int(font_metrics::maxHeight(font) *  1.2);
+	return int(font_metrics::maxHeight(LyXFont(LyXFont::ALL_SANE)) *  1.2);
 }