X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fcursor.C;h=85b7956e56855f7edfe0334a812d4911d623278c;hb=b634b3eb3b5cc1c47fd3bc63294e16536d4f7664;hp=0e1d34b17e0a2aa05baa043e7a74c8d152148c45;hpb=57536be00f30e3f7e49363ec47aea7afac66768a;p=lyx.git

diff --git a/src/cursor.C b/src/cursor.C
index 0e1d34b17e..85b7956e56 100644
--- a/src/cursor.C
+++ b/src/cursor.C
@@ -3,76 +3,1355 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author Jürgen Vigna
+ * \author Alejandro Aguilar Sierra
+ * \author Alfredo Braunstein
+ * \author André Pönitz
  *
  * Full author contact details are available in file CREDITS.
  */
 
 #include <config.h>
 
-#include "buffer.h"
 #include "BufferView.h"
+#include "buffer.h"
 #include "cursor.h"
 #include "debug.h"
+#include "dispatchresult.h"
+#include "encoding.h"
+#include "funcrequest.h"
 #include "iterators.h"
+#include "language.h"
+#include "lfuns.h"
+#include "lyxfont.h"
+#include "lyxfunc.h" // only for setMessage()
+#include "lyxrc.h"
+#include "lyxrow.h"
 #include "lyxtext.h"
 #include "paragraph.h"
+#include "paragraph_funcs.h"
 
 #include "insets/updatableinset.h"
+#include "insets/insettabular.h"
+#include "insets/insettext.h"
+
+#include "mathed/math_data.h"
+#include "mathed/math_hullinset.h"
+#include "mathed/math_support.h"
+
+#include "support/limited_stack.h"
+#include "support/std_sstream.h"
 
+#include "frontends/LyXView.h"
+
+#include <boost/assert.hpp>
+
+using std::string;
 using std::vector;
+using std::endl;
+#ifndef CXX_GLOBAL_CSTD
+using std::isalpha;
+#endif
+using std::min;
+using std::swap;
+
+
+
+// our own cut buffer
+limited_stack<string> theCutBuffer;
+
+
+LCursor::LCursor(BufferView & bv)
+	: DocumentIterator(), bv_(&bv), anchor_(),
+	  cached_y_(0), x_target_(-1), selection_(false), mark_(false)
+{}
+
+
+void LCursor::reset()
+{
+	clear();
+	push_back(CursorSlice());
+	anchor_.clear();
+	anchor_.push_back(CursorSlice());
+	cached_y_ = 0;
+	clearTargetX();
+	selection_ = false;
+	mark_ = false;
+}
+
+
+void LCursor::setCursor(DocumentIterator const & cur, bool sel)
+{
+	// this (intentionally) does not touch the anchor
+	DocumentIterator::operator=(cur);
+	selection() = sel;
+}
+
+
+DispatchResult LCursor::dispatch(FuncRequest const & cmd0)
+{
+	if (empty())
+		return DispatchResult();
+
+	//lyxerr << "\nLCursor::dispatch: cmd: " << cmd0 << endl << *this << endl;
+	FuncRequest cmd = cmd0;
+	nopop_ = false;
+	LCursor safe = *this;
+
+	for ( ; size(); pop()) {
+		lyxerr << "\nLCursor::dispatch: cmd: " << cmd0 << endl << *this << endl;
+		BOOST_ASSERT(pos() <= lastpos());
+		BOOST_ASSERT(idx() <= lastidx());
+		BOOST_ASSERT(par() <= lastpar());
+
+		// The common case is 'LFUN handled, need update', so make the 
+		// LFUN handler's life easier by assuming this as default value.
+		// The handler can reset the update and val flags if necessary.
+		disp_.update(true);
+		disp_.dispatched(true);
+		inset().dispatch(*this, cmd);
+		if (disp_.dispatched())
+			break;
+	}
+	// it completely to get a 'bomb early' behaviour in case this
+	// object will be used again.
+	if (nopop_ || !disp_.dispatched())
+		operator=(safe);
+	return disp_;
+}
+
+
+bool LCursor::getStatus(FuncRequest const & cmd, FuncStatus & status)
+{
+	LCursor safe = *this;
+	for ( ; size(); pop()) {
+		//lyxerr << "\nLCursor::getStatus: cmd: " << cmd << endl << *this << endl;
+		BOOST_ASSERT(pos() <= lastpos());
+		BOOST_ASSERT(idx() <= lastidx());
+		BOOST_ASSERT(par() <= lastpar());
+
+		// The inset's getStatus() will return 'true' if it made
+		// a definitive decision on whether it want to handle the
+		// request or not. The result of this decision is put into
+		// the 'status' parameter.
+		if (inset().getStatus(*this, cmd, status))
+			break;
+	}
+	operator=(safe);
+	return true;
+}
+
+
+BufferView & LCursor::bv() const
+{
+	return *bv_;
+}
+
+
+void LCursor::pop()
+{
+	BOOST_ASSERT(size() >= 1);
+	pop_back();
+	anchor_.pop_back();
+}
+
+
+void LCursor::push(InsetBase & p)
+{
+	push_back(CursorSlice(p));
+}
+
+
+void LCursor::pushLeft(InsetBase & p)
+{
+	BOOST_ASSERT(!empty());
+	//lyxerr << "Entering inset " << t << " left" << endl;
+	push(p);
+	p.idxFirst(*this);
+}
+
+
+bool LCursor::popLeft()
+{
+	BOOST_ASSERT(!empty());
+	//lyxerr << "Leaving inset to the left" << endl;
+	if (depth() <= 1) {
+		if (depth() == 1)
+			inset().notifyCursorLeaves(idx());
+		return false;
+	}
+	inset().notifyCursorLeaves(idx());
+	pop();
+	return true;
+}
+
+
+bool LCursor::popRight()
+{
+	BOOST_ASSERT(!empty());
+	//lyxerr << "Leaving inset to the right" << endl;
+	if (depth() <= 1) {
+		if (depth() == 1)
+			inset().notifyCursorLeaves(idx());
+		return false;
+	}
+	inset().notifyCursorLeaves(idx());
+	pop();
+	++pos();
+	return true;
+}
+
+
+int LCursor::currentMode()
+{
+	BOOST_ASSERT(!empty());
+	for (int i = size() - 1; i >= 1; --i) {
+		int res = operator[](i).inset().currentMode();
+		if (res != MathInset::UNDECIDED_MODE)
+			return res;
+	}
+	return MathInset::TEXT_MODE;
+}
+
+
+void LCursor::updatePos()
+{
+	BOOST_ASSERT(!empty());
+	if (size() > 1)
+		cached_y_ = bv().top_y() + back().inset().yo();
+		//cached_y_ = back().inset().yo();
+}
+
+
+void LCursor::getDim(int & asc, int & des) const
+{
+	if (inMathed()) {
+		BOOST_ASSERT(inset().asMathInset());
+		//inset().asMathInset()->getCursorDim(asc, des);
+		asc = 10;
+		des = 10;
+	} else if (inTexted()) {
+		Row const & row = textRow();
+		asc = row.baseline();
+		des = row.height() - asc;
+	} else {
+		lyxerr << "should this happen?" << endl;
+		asc = 10;
+		des = 10;
+	}
+}
+
+
+void LCursor::getPos(int & x, int & y) const
+{
+	x = 0;
+	y = 0;
+	if (!empty())
+		inset().getCursorPos(back(), x, y);
+	// getCursorPos gives _screen_ coordinates. We need to add
+	// top_y to get document coordinates. This is hidden in cached_y_.
+	//y += cached_y_ - inset().yo();
+	// The rest is non-obvious. The reason we have to have these
+	// extra computation is that the getCursorPos() calls rely
+	// on the inset's own knowledge of its screen position.
+	// If we scroll up or down in a big enough increment,
+	// inset->draw() is not called: this doesn't update
+	// inset.yo_, so getCursor() returns an old value.
+	// Ugly as you like.
+}
+
+
+void LCursor::paste(string const & data)
+{
+	dispatch(FuncRequest(LFUN_PASTE, data));
+}
+
+
+void LCursor::resetAnchor()
+{
+	anchor_ = *this;
+}
+
+
+
+bool LCursor::posLeft()
+{
+	if (pos() == 0)
+		return false;
+	--pos();
+	return true;
+}
+
+
+bool LCursor::posRight()
+{
+	if (pos() == lastpos())
+		return false;
+	++pos();
+	return true;
+}
+
+
+CursorSlice & LCursor::anchor()
+{
+	return anchor_.back();
+}
+
+
+CursorSlice const & LCursor::anchor() const
+{
+	return anchor_.back();
+}
+
+
+CursorSlice const & LCursor::selBegin() const
+{
+	if (!selection())
+		return back();
+	return anchor() < back() ? anchor() : back();
+}
+
+
+CursorSlice & LCursor::selBegin()
+{
+	if (!selection())
+		return back();
+	// can't use std::min as this returns a const ref
+	return anchor() < back() ? anchor() : back();
+}
+
+
+CursorSlice const & LCursor::selEnd() const
+{
+	if (!selection())
+		return back();
+	return anchor() > back() ? anchor() : back();
+}
+
+
+CursorSlice & LCursor::selEnd()
+{
+	if (!selection())
+		return back();
+	// can't use std::min as this returns a const ref
+	return anchor() > back() ? anchor() : back();
+}
 
 
-dispatch_result Cursor::dispatch(FuncRequest const &)
+void LCursor::setSelection()
 {
-	for (int i = data_.size() - 1; i >= 0; --i) {
-		lyxerr << "trying to dispatch to " << data_[i].text_ << std::endl;
+	selection() = true;
+	// a selection with no contents is not a selection
+	if (par() == anchor().par() && pos() == anchor().pos())
+		selection() = false;
+}
+
+
+void LCursor::setSelection(DocumentIterator const & where, size_t n)
+{
+	selection() = true;
+	setCursor(where, false);
+	anchor_ = where;
+	pos() += n;
+}
+
+
+void LCursor::clearSelection()
+{
+	selection() = false;
+	mark() = false;
+	resetAnchor();
+	bv().unsetXSel();
+}
+
+
+int & LCursor::x_target()
+{
+	return x_target_;
+}
+
+
+int LCursor::x_target() const
+{
+	return x_target_;
+}
+
+
+void LCursor::clearTargetX()
+{
+	x_target_ = -1;
+}
+
+
+
+void LCursor::info(std::ostream & os) const
+{
+	for (int i = 1, n = depth(); i < n; ++i) {
+		operator[](i).inset().infoize(os);
+		os << "  ";
+	}
+	if (pos() != 0)
+		prevInset()->infoize2(os);
+	// overwite old message
+	os << "                    ";
+}
+
+
+namespace {
+
+void region(CursorSlice const & i1, CursorSlice const & i2,
+	LCursor::row_type & r1, LCursor::row_type & r2,
+	LCursor::col_type & c1, LCursor::col_type & c2)
+{
+	InsetBase & p = i1.inset();
+	c1 = p.col(i1.idx_);
+	c2 = p.col(i2.idx_);
+	if (c1 > c2)
+		swap(c1, c2);
+	r1 = p.row(i1.idx_);
+	r2 = p.row(i2.idx_);
+	if (r1 > r2)
+		swap(r1, r2);
+}
+
+}
+
+
+string LCursor::grabSelection()
+{
+	if (!selection())
+		return string();
+
+	CursorSlice i1 = selBegin();
+	CursorSlice i2 = selEnd();
+
+	if (i1.idx_ == i2.idx_) {
+		if (i1.inset().asMathInset()) {
+			MathArray::const_iterator it = i1.cell().begin();
+			return asString(MathArray(it + i1.pos_, it + i2.pos_));
+		} else {
+			return "unknown selection 1";
+		}
+	}
+
+	row_type r1, r2;
+	col_type c1, c2;
+	region(i1, i2, r1, r2, c1, c2);
+
+	string data;
+	if (i1.inset().asMathInset()) {
+		for (row_type row = r1; row <= r2; ++row) {
+			if (row > r1)
+				data += "\\\\";
+			for (col_type col = c1; col <= c2; ++col) {
+				if (col > c1)
+					data += '&';
+				data += asString(i1.asMathInset()->cell(i1.asMathInset()->index(row, col)));
+			}
+		}
+	} else {
+		data = "unknown selection 2";
+	}
+	return data;
+}
+
+
+void LCursor::eraseSelection()
+{
+	//lyxerr << "LCursor::eraseSelection" << endl;
+	CursorSlice const & i1 = selBegin();
+	CursorSlice const & i2 = selEnd();
+#warning FIXME
+	if (i1.inset().asMathInset()) {
+		if (i1.idx_ == i2.idx_) {
+			i1.cell().erase(i1.pos_, i2.pos_);
+		} else {
+			MathInset * p = i1.asMathInset();
+			row_type r1, r2;
+			col_type c1, c2;
+			region(i1, i2, r1, r2, c1, c2);
+			for (row_type row = r1; row <= r2; ++row)
+				for (col_type col = c1; col <= c2; ++col)
+					p->cell(p->index(row, col)).clear();
+		}
+		back() = i1;
+	} else {
+		lyxerr << "can't erase this selection 1" << endl;
+	}
+	//lyxerr << "LCursor::eraseSelection end" << endl;
+}
+
+
+string LCursor::grabAndEraseSelection()
+{
+	if (!selection())
+		return string();
+	string res = grabSelection();
+	eraseSelection();
+	selection() = false;
+	return res;
+}
+
+
+void LCursor::selClear()
+{
+	resetAnchor();
+	clearSelection();
+}
+
+
+void LCursor::selCopy()
+{
+	if (selection()) {
+		theCutBuffer.push(grabSelection());
+		selection() = false;
+	} else {
+		//theCutBuffer.erase();
 	}
-	return UNDISPATCHED;
 }
 
 
-void buildCursor(Cursor & cursor, BufferView & bv)
+void LCursor::selCut()
+{
+	theCutBuffer.push(grabAndEraseSelection());
+}
+
+
+void LCursor::selDel()
 {
-	UpdatableInset * inset = bv.theLockingInset();
-	lyxerr << "\nbuildCursor: " << inset << std::endl;
-	if (!inset)
+	//lyxerr << "LCursor::selDel" << endl;
+	if (selection()) {
+		eraseSelection();
+		selection() = false;
+	}
+}
+
+
+void LCursor::selPaste(size_t n)
+{
+	selClearOrDel();
+	if (n < theCutBuffer.size())
+		paste(theCutBuffer[n]);
+	//grabSelection();
+	selection() = false;
+}
+
+
+void LCursor::selHandle(bool sel)
+{
+	//lyxerr << "LCursor::selHandle" << endl;
+	if (sel == selection())
 		return;
-	
-	inset = inset->getLockingInset();
-
-	bool ok = false;
-	ParIterator pit = bv.buffer()->par_iterator_begin();
-	ParIterator end = bv.buffer()->par_iterator_end();
-	for ( ; pit != end && !ok; ++pit) {
-		InsetList::iterator	it = pit->insetlist.begin();
-		InsetList::iterator	iend = pit->insetlist.end();
-		for ( ; it != iend && !ok; ++it) 
-			if (it->inset == inset || it->inset == inset->owner())
-				ok = true;
-	}
-
-	if (!ok) {
-		lyxerr << " tli not found! inset: " << inset << std::endl;
+	resetAnchor();
+	selection() = sel;
+}
+
+
+void LCursor::selClearOrDel()
+{
+	//lyxerr << "LCursor::selClearOrDel" << endl;
+	if (lyxrc.auto_region_delete)
+		selDel();
+	else
+		selection() = false;
+}
+
+
+std::ostream & operator<<(std::ostream & os, LCursor const & cur)
+{
+	for (size_t i = 0, n = cur.size(); i != n; ++i)
+		os << " " << cur.operator[](i) << " | " << cur.anchor_[i] << "\n";
+	os << " selection: " << cur.selection_ << endl;
+	return os;
+}
+
+
+
+
+///////////////////////////////////////////////////////////////////
+//
+// The part below is the non-integrated rest of the original math
+// cursor. This should be either generalized for texted or moved
+// back to mathed (in most cases to MathNestInset).
+//
+///////////////////////////////////////////////////////////////////
+
+#include "mathed/math_charinset.h"
+#include "mathed/math_factory.h"
+#include "mathed/math_gridinset.h"
+#include "mathed/math_macroarg.h"
+#include "mathed/math_macrotemplate.h"
+#include "mathed/math_mathmlstream.h"
+#include "mathed/math_scriptinset.h"
+#include "mathed/math_support.h"
+#include "mathed/math_unknowninset.h"
+
+//#define FILEDEBUG 1
+
+
+bool LCursor::isInside(InsetBase const * p)
+{
+	for (unsigned i = 0; i < depth(); ++i)
+		if (&operator[](i).inset() == p)
+			return true;
+	return false;
+}
+
+
+bool LCursor::openable(MathAtom const & t) const
+{
+	if (!t->isActive())
+		return false;
+
+	if (t->lock())
+		return false;
+
+	if (!selection())
+		return true;
+
+	// we can't move into anything new during selection
+	if (depth() == anchor_.size())
+		return false;
+	if (!ptr_cmp(t.nucleus(), &anchor_[depth()].inset()))
+		return false;
+
+	return true;
+}
+
+
+bool positionable(DocumentIterator const & cursor,
+	DocumentIterator const & anchor)
+{
+	// avoid deeper nested insets when selecting
+	if (cursor.size() > anchor.size())
+		return false;
+
+	// anchor might be deeper, should have same path then
+	for (size_t i = 0; i < cursor.size(); ++i)
+		if (&cursor[i].inset() != &anchor[i].inset())
+			return false;
+
+	// position should be ok.
+	return true;
+}
+
+
+void LCursor::setScreenPos(int x, int y)
+{
+	bool res = bruteFind(x, y, formula()->xlow(), formula()->xhigh(),
+		formula()->ylow(), formula()->yhigh());
+	if (!res) {
+		// this can happen on creation of "math-display"
+		idx() = 0;
+		pos() = 0;
+	}
+	clearTargetX();
+}
+
+
+
+void LCursor::plainErase()
+{
+	cell().erase(pos());
+}
+
+
+void LCursor::markInsert()
+{
+	cell().insert(pos(), MathAtom(new MathCharInset(0)));
+}
+
+
+void LCursor::markErase()
+{
+	cell().erase(pos());
+}
+
+
+void LCursor::plainInsert(MathAtom const & t)
+{
+	cell().insert(pos(), t);
+	++pos();
+}
+
+
+void LCursor::insert(string const & str)
+{
+	lyxerr << "LCursor::insert str '" << str << "'" << endl;
+	for (string::const_iterator it = str.begin(); it != str.end(); ++it)
+		insert(*it);
+}
+
+
+void LCursor::insert(char c)
+{
+	//lyxerr << "LCursor::insert char '" << c << "'" << endl;
+	BOOST_ASSERT(!empty());
+	if (inMathed()) {
+		selClearOrDel();
+		plainInsert(MathAtom(new MathCharInset(c)));
+	} else {
+		text()->insertChar(*this, c);
+	}
+}
+
+
+void LCursor::insert(MathAtom const & t)
+{
+	//lyxerr << "LCursor::insert MathAtom: " << endl;
+	macroModeClose();
+	selClearOrDel();
+	plainInsert(t);
+}
+
+
+void LCursor::insert(InsetBase * inset)
+{
+	if (inMathed())
+		insert(MathAtom(inset));
+	else
+		text()->insertInset(*this, inset);
+}
+
+
+void LCursor::niceInsert(string const & t)
+{
+	MathArray ar;
+	asArray(t, ar);
+	if (ar.size() == 1)
+		niceInsert(ar[0]);
+	else
+		insert(ar);
+}
+
+
+void LCursor::niceInsert(MathAtom const & t)
+{
+	macroModeClose();
+	string safe = grabAndEraseSelection();
+	plainInsert(t);
+	// enter the new inset and move the contents of the selection if possible
+	if (t->isActive()) {
+		posLeft();
+		// be careful here: don't use 'pushLeft(t)' as this we need to
+		// push the clone, not the original
+		pushLeft(*nextInset());
+		paste(safe);
+	}
+}
+
+
+void LCursor::insert(MathArray const & ar)
+{
+	macroModeClose();
+	if (selection())
+		eraseSelection();
+	cell().insert(pos(), ar);
+	pos() += ar.size();
+}
+
+
+bool LCursor::backspace()
+{
+	autocorrect() = false;
+
+	if (selection()) {
+		selDel();
+		return true;
+	}
+
+	if (pos() == 0) {
+		if (inset().nargs() == 1 && depth() == 1 && lastpos() == 0)
+			return false;
+		pullArg();
+		return true;
+	}
+
+	if (inMacroMode()) {
+		MathUnknownInset * p = activeMacro();
+		if (p->name().size() > 1) {
+			p->setName(p->name().substr(0, p->name().size() - 1));
+			return true;
+		}
+	}
+
+	if (pos() != 0 && prevAtom()->nargs() > 0) {
+		// let's require two backspaces for 'big stuff' and
+		// highlight on the first
+		selection() = true;
+		--pos();
+	} else {
+		--pos();
+		plainErase();
+	}
+	return true;
+}
+
+
+bool LCursor::erase()
+{
+	autocorrect() = false;
+	if (inMacroMode())
+		return true;
+
+	if (selection()) {
+		selDel();
+		return true;
+	}
+
+	// delete empty cells if possible
+	if (pos() == lastpos() && inset().idxDelete(idx()))
+		return true;
+
+	// special behaviour when in last position of cell
+	if (pos() == lastpos()) {
+		bool one_cell = inset().nargs() == 1;
+		if (one_cell && depth() == 1 && lastpos() == 0)
+			return false;
+		// remove markup
+		if (one_cell)
+			pullArg();
+		else
+			inset().idxGlue(idx());
+		return true;
+	}
+
+	if (pos() != lastpos() && inset().nargs() > 0) {
+		selection() = true;
+		++pos();
+	} else {
+		plainErase();
+	}
+
+	return true;
+}
+
+
+bool LCursor::up()
+{
+	macroModeClose();
+	DocumentIterator save = *this;
+	if (goUpDown(true))
+		return true;
+	setCursor(save, false);
+	autocorrect() = false;
+	return selection();
+}
+
+
+bool LCursor::down()
+{
+	macroModeClose();
+	DocumentIterator save = *this;
+	if (goUpDown(false))
+		return true;
+	setCursor(save, false);
+	autocorrect() = false;
+	return selection();
+}
+
+
+void LCursor::macroModeClose()
+{
+	if (!inMacroMode())
+		return;
+	MathUnknownInset * p = activeMacro();
+	p->finalize();
+	string s = p->name();
+	--pos();
+	cell().erase(pos());
+
+	// do nothing if the macro name is empty
+	if (s == "\\")
 		return;
+
+	string const name = s.substr(1);
+
+	// prevent entering of recursive macros
+	InsetBase const * macro = innerInsetOfType(InsetBase::MATHMACRO_CODE);
+	if (macro && macro->getInsetName() == name)
+		lyxerr << "can't enter recursive macro" << endl;
+
+	niceInsert(createMathInset(name));
+}
+
+
+string LCursor::macroName()
+{
+	return inMacroMode() ? activeMacro()->name() : string();
+}
+
+
+void LCursor::handleNest(MathAtom const & a, int c)
+{
+	//lyxerr << "LCursor::handleNest: " << c << endl;
+	MathAtom t = a;
+	asArray(grabAndEraseSelection(), t.nucleus()->cell(c));
+	insert(t);
+	posLeft();
+	pushLeft(*nextInset());
+}
+
+
+int LCursor::targetX() const
+{
+	if (x_target() != -1)
+		return x_target();
+	int x = 0;
+	int y = 0;
+	getPos(x, y);
+	return x;
+}
+
+
+MathHullInset * LCursor::formula() const
+{
+	for (int i = size() - 1; i >= 1; --i) {
+		MathInset * inset = operator[](i).inset().asMathInset();
+		if (inset && inset->asHullInset())
+			return static_cast<MathHullInset *>(inset);
 	}
+	return 0;
+}
+
+
+void LCursor::adjust(pos_type from, int diff)
+{
+	if (pos() > from)
+		pos() += diff;
+	if (anchor().pos_ > from)
+		anchor().pos_ += diff;
+	// just to be on the safe side
+	// theoretically unecessary
+	normalize();
+}
+
+
+bool LCursor::inMacroMode() const
+{
+	if (!pos() != 0)
+		return false;
+	MathUnknownInset const * p = prevAtom()->asUnknownInset();
+	return p && !p->final();
+}
+
+
+MathUnknownInset * LCursor::activeMacro()
+{
+	return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
+}
+
+
+bool LCursor::inMacroArgMode() const
+{
+	return pos() > 0 && prevAtom()->getChar() == '#';
+}
+
+
+MathGridInset * LCursor::enclosingGrid(idx_type & idx) const
+{
+	for (MathInset::difference_type i = depth() - 1; i >= 0; --i) {
+		MathInset * m = operator[](i).inset().asMathInset();
+		if (!m)
+			return 0;
+		MathGridInset * p = m->asGridInset();
+		if (p) {
+			idx = operator[](i).idx_;
+			return p;
+		}
+	}
+	return 0;
+}
 
-	vector<ParagraphList::iterator> pits; 
-	vector<ParagraphList const *>   plists;
-	vector<LyXText *>               texts;
-/*
-	pit.getPits(pits, plists, texts);
-
-	cursor.data_.resize(pits.size());
-	for (size_t i = 0, n = pits.size(); i != n; ++i) {
-		cursor.data_[i].text_ = texts[i];
-		cursor.data_[i].pit_  = pits[i];
-		//cursor.data_[i].pos_ = texts[i]->cursor.pos();
-		cursor.data_[i].pos_ = 0;
-		lyxerr << " text: " << cursor.data_[i].text_
-		       << " pit: " << cursor.data_[i].pit_->id()
-		       << " pos: " << cursor.data_[i].pos_
-		       << std::endl;
-	}
-*/
+
+void LCursor::pullArg()
+{
+#warning Look here
+	MathArray ar = cell();
+	if (popLeft() && inMathed()) {
+		plainErase();
+		cell().insert(pos(), ar);
+		resetAnchor();
+	} else {
+		//formula()->mutateToText();
+	}
+}
+
+
+void LCursor::touch()
+{
+#warning look here
+#if 0
+	DocumentIterator::const_iterator it = begin();
+	DocumentIterator::const_iterator et = end();
+	for ( ; it != et; ++it)
+		it->cell().touch();
+#endif
+}
+
+
+void LCursor::normalize()
+{
+	if (idx() >= nargs()) {
+		lyxerr << "this should not really happen - 1: "
+		       << idx() << ' ' << nargs()
+		       << " in: " << &inset() << endl;
+	}
+	idx() = min(idx(), lastidx());
+
+	if (pos() > lastpos()) {
+		lyxerr << "this should not really happen - 2: "
+			<< pos() << ' ' << lastpos() <<  " in idx: " << idx()
+		       << " in atom: '";
+		WriteStream wi(lyxerr, false, true);
+		inset().asMathInset()->write(wi);
+		lyxerr << endl;
+	}
+	pos() = min(pos(), lastpos());
+}
+
+
+char LCursor::valign()
+{
+	idx_type idx;
+	MathGridInset * p = enclosingGrid(idx);
+	return p ? p->valign() : '\0';
+}
+
+
+char LCursor::halign()
+{
+	idx_type idx;
+	MathGridInset * p = enclosingGrid(idx);
+	return p ? p->halign(idx % p->ncols()) : '\0';
+}
+
+
+bool LCursor::goUpDown(bool up)
+{
+	// Be warned: The 'logic' implemented in this function is highly
+	// fragile. A distance of one pixel or a '<' vs '<=' _really
+	// matters. So fiddle around with it only if you think you know
+	// what you are doing!
+  int xo = 0;
+	int yo = 0;
+	getPos(xo, yo);
+
+	// check if we had something else in mind, if not, this is the future goal
+	if (x_target() == -1)
+		x_target() = xo;
+	else
+		xo = x_target();
+
+	// try neigbouring script insets
+	if (!selection()) {
+		// try left
+		if (pos() != 0) {
+			MathScriptInset const * p = prevAtom()->asScriptInset();
+			if (p && p->has(up)) {
+				--pos();
+				push(inset());
+				idx() = up; // the superscript has index 1
+				pos() = lastpos();
+				//lyxerr << "updown: handled by scriptinset to the left" << endl;
+				return true;
+			}
+		}
+
+		// try right
+		if (pos() != lastpos()) {
+			MathScriptInset const * p = nextAtom()->asScriptInset();
+			if (p && p->has(up)) {
+				push(inset());
+				idx() = up;
+				pos() = 0;
+				//lyxerr << "updown: handled by scriptinset to the right" << endl;
+				return true;
+			}
+		}
+	}
+
+	// try current cell for e.g. text insets
+	if (inset().idxUpDown2(*this, up))
+		return true;
+
+	//xarray().boundingBox(xlow, xhigh, ylow, yhigh);
+	//if (up)
+	//	yhigh = yo - 4;
+	//else
+	//	ylow = yo + 4;
+	//if (bruteFind(xo, yo, xlow, xhigh, ylow, yhigh)) {
+	//	lyxerr << "updown: handled by brute find in the same cell" << endl;
+	//	return true;
+	//}
+
+	// try to find an inset that knows better then we
+	while (1) {
+		//lyxerr << "updown: We are in " << &inset() << " idx: " << idx() << endl;
+		// ask inset first
+		if (inset().idxUpDown(*this, up)) {
+			// try to find best position within this inset
+			if (!selection())
+				bruteFind2(xo, yo);
+			return true;
+		}
+
+		// no such inset found, just take something "above"
+		//lyxerr << "updown: handled by strange case" << endl;
+		if (!popLeft()) {
+			return
+				bruteFind(xo, yo,
+					formula()->xlow(),
+					formula()->xhigh(),
+					up ? formula()->ylow() : yo + 4,
+					up ? yo - 4 : formula()->yhigh()
+				);
+		}
+
+		// any improvement so far?
+		int xnew, ynew;
+		getPos(xnew, ynew);
+		if (up ? ynew < yo : ynew > yo)
+			return true;
+	}
+}
+
+
+bool LCursor::bruteFind(int x, int y, int xlow, int xhigh, int ylow, int yhigh)
+{
+	DocumentIterator best_cursor;
+	double best_dist = 1e10;
+
+	DocumentIterator it = insetBegin(bv().buffer()->inset());
+	DocumentIterator et = insetEnd();
+	while (1) {
+		// avoid invalid nesting when selecting
+		if (!selection() || positionable(it, anchor_)) {
+			int xo, yo;
+			CursorSlice & cur = it.back();
+			cur.inset().getCursorPos(cur, xo, yo);
+			if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
+				double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
+				//lyxerr << "x: " << x << " y: " << y << " d: " << endl;
+				// '<=' in order to take the last possible position
+				// this is important for clicking behind \sum in e.g. '\sum_i a'
+				if (d <= best_dist) {
+					best_dist   = d;
+					best_cursor = it;
+				}
+			}
+		}
+
+		if (it == et)
+			break;
+		it.forwardPos();
+	}
+
+	if (best_dist < 1e10)
+		setCursor(best_cursor, false);
+	return best_dist < 1e10;
+}
+
+
+void LCursor::bruteFind2(int x, int y)
+{
+	double best_dist = 1e10;
+
+	DocumentIterator it = *this;
+	it.back().pos() = 0;
+	DocumentIterator et = *this;
+	et.back().pos() = et.back().asMathInset()->cell(et.back().idx_).size();
+	for (int i = 0; ; ++i) {
+		int xo, yo;
+		CursorSlice & cur = it.back();
+		cur.inset().getCursorPos(cur, xo, yo);
+		double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
+		// '<=' in order to take the last possible position
+		// this is important for clicking behind \sum in e.g. '\sum_i a'
+		lyxerr << "i: " << i << " d: " << d << " best: " << best_dist << endl;
+		if (d <= best_dist) {
+			best_dist = d;
+			setCursor(it, false);
+		}
+		if (it == et)
+			break;
+		it.forwardPos();
+	}
+}
+
+
+CursorSlice LCursor::normalAnchor()
+{
+	if (anchor_.size() < depth()) {
+		resetAnchor();
+		lyxerr << "unusual Anchor size" << endl;
+	}
+	//lyx::BOOST_ASSERT(Anchor_.size() >= cursor.depth());
+	// use Anchor on the same level as Cursor
+	CursorSlice normal = anchor_[size() - 1];
+#if 0
+	if (depth() < anchor_.size() && !(normal < xx())) {
+		// anchor is behind cursor -> move anchor behind the inset
+		++normal.pos_;
+	}
+#endif
+	return normal;
+}
+
+
+void LCursor::handleFont(string const & font)
+{
+	lyxerr << "LCursor::handleFont: " << font << endl;
+	string safe;
+	if (selection()) {
+		macroModeClose();
+		safe = grabAndEraseSelection();
+	}
+
+	if (lastpos() != 0) {
+		// something left in the cell
+		if (pos() == 0) {
+			// cursor in first position
+			popLeft();
+		} else if (pos() == lastpos()) {
+			// cursor in last position
+			popRight();
+		} else {
+			// cursor in between. split cell
+			MathArray::iterator bt = cell().begin();
+			MathAtom at = createMathInset(font);
+			at.nucleus()->cell(0) = MathArray(bt, bt + pos());
+			cell().erase(bt, bt + pos());
+			popLeft();
+			plainInsert(at);
+		}
+	} else {
+		// nothing left in the cell
+		pullArg();
+		plainErase();
+	}
+	insert(safe);
+}
+
+
+void LCursor::message(string const & msg) const
+{
+	bv().owner()->getLyXFunc().setMessage(msg);
+}
+
+
+void LCursor::errorMessage(string const & msg) const
+{
+	bv().owner()->getLyXFunc().setErrorMessage(msg);
+}
+
+
+string LCursor::selectionAsString(bool label) const
+{
+	if (!selection())
+		return string();
+
+	if (inTexted()) {
+		Buffer const & buffer = *bv().buffer();
+
+		// should be const ...
+		ParagraphList::iterator startpit = text()->getPar(selBegin());
+		ParagraphList::iterator endpit = text()->getPar(selEnd());
+		size_t const startpos = selBegin().pos();
+		size_t const endpos = selEnd().pos();
+
+		if (startpit == endpit)
+			return startpit->asString(buffer, startpos, endpos, label);
+
+		// First paragraph in selection
+		string result =
+			startpit->asString(buffer, startpos, startpit->size(), label) + "\n\n";
+
+		// The paragraphs in between (if any)
+		ParagraphList::iterator pit = startpit;
+		for (++pit; pit != endpit; ++pit)
+			result += pit->asString(buffer, 0, pit->size(), label) + "\n\n";
+
+		// Last paragraph in selection
+		result += endpit->asString(buffer, 0, endpos, label);
+
+		return result;
+	}
+
+#warning and mathed?
+	return string();
+}
+
+
+string LCursor::currentState()
+{
+	if (inMathed()) {
+		std::ostringstream os;
+		info(os);
+		return os.str();
+	}
+
+	if (inTexted())
+	 return text()->currentState(*this);
+
+	return string();
+}
+
+
+// only used by the spellchecker
+void LCursor::replaceWord(string const & replacestring)
+{
+	LyXText * t = text();
+	BOOST_ASSERT(t);
+
+	t->replaceSelectionWithString(*this, replacestring);
+	t->setSelectionRange(*this, replacestring.length());
+
+	// Go back so that replacement string is also spellchecked
+	for (string::size_type i = 0; i < replacestring.length() + 1; ++i)
+		t->cursorLeft(*this);
+}
+
+
+void LCursor::update()
+{
+	bv().update();
+}
+
+
+string LCursor::getPossibleLabel()
+{
+	return inMathed() ? "eq:" : text()->getPossibleLabel(*this);
+}
+
+
+Encoding const * LCursor::getEncoding() const
+{
+	if (empty())
+		return 0;
+	if (!bv().buffer())
+		return 0;
+	int s = 0;
+	// go up until first non-0 text is hit
+	// (innermost text is 0 in mathed)
+	for (s = size() - 1; s >= 0; --s)
+		if (operator[](s).text())
+			break;
+	CursorSlice const & sl = operator[](s);
+	LyXText & text = *sl.text();
+	ParagraphList::iterator pit = text.getPar(sl.par());
+	LyXFont font = pit->getFont(
+		bv().buffer()->params(), sl.pos(), outerFont(pit, text.paragraphs()));	
+	return font.language()->encoding();
+}
+
+
+void LCursor::undispatched()
+{
+	disp_.dispatched(false);
+}
+
+
+void LCursor::noUpdate()
+{
+	disp_.update(false);
 }