]> git.lyx.org Git - lyx.git/blobdiff - src/cursor.C
add config.h
[lyx.git] / src / cursor.C
index 28b1bffd0cb8df55bbe9cde46b65117fa9d07493..5d72bfff899f041ceae47652e21bfcecaca1b144 100644 (file)
 #include <config.h>
 
 #include "BufferView.h"
+#include "bufferview_funcs.h"
 #include "buffer.h"
 #include "cursor.h"
+#include "coordcache.h"
 #include "CutAndPaste.h"
 #include "debug.h"
 #include "dispatchresult.h"
 #include "paragraph_funcs.h"
 #include "pariterator.h"
 
-#include "insets/updatableinset.h"
 #include "insets/insettabular.h"
 #include "insets/insettext.h"
 
-#include "mathed/math_data.h"
-#include "mathed/math_inset.h"
-#include "mathed/math_macrotable.h"
+#include "mathed/MathData.h"
+#include "mathed/InsetMath.h"
+#include "mathed/InsetMathScript.h"
+#include "mathed/MathMacroTable.h"
 
 #include "support/limited_stack.h"
 
-#include "frontends/LyXView.h"
-
 #include <boost/assert.hpp>
+#include <boost/bind.hpp>
 #include <boost/current_function.hpp>
 
 #include <sstream>
+#include <limits>
+#include <map>
 
-using lyx::par_type;
+namespace lyx {
 
 using std::string;
 using std::vector;
@@ -57,19 +60,19 @@ using std::endl;
 using std::isalpha;
 #endif
 using std::min;
-using std::swap;
+using std::for_each;
 
 namespace {
 
-       bool positionable
-               (DocIterator const & cursor, DocIterator const & anchor)
+       bool
+       positionable(DocIterator const & cursor, DocIterator const & anchor)
        {
                // avoid deeper nested insets when selecting
-               if (cursor.size() > anchor.size())
+               if (cursor.depth() > anchor.depth())
                        return false;
 
                // anchor might be deeper, should have same path then
-               for (size_t i = 0; i < cursor.size(); ++i)
+               for (size_t i = 0; i < cursor.depth(); ++i)
                        if (&cursor[i].inset() != &anchor[i].inset())
                                return false;
 
@@ -79,25 +82,44 @@ namespace {
 
 
        // Find position closest to (x, y) in cell given by iter.
+       // Used only in mathed
        DocIterator bruteFind2(LCursor const & c, int x, int y)
        {
-               double best_dist = 1e10;
+               double best_dist = std::numeric_limits<double>::max();
 
                DocIterator result;
 
                DocIterator it = c;
-               it.back().pos() = 0;
+               it.top().pos() = 0;
                DocIterator et = c;
-               et.back().pos() = et.back().asMathInset()->cell(et.back().idx()).size();
-               for (int i = 0; ; ++i) {
-                       int xo, yo;
-                       LCursor cur = c;
-                       cur.setCursor(it);
-                       cur.inset().getCursorPos(cur, xo, yo);
+               et.top().pos() = et.top().asInsetMath()->cell(et.top().idx()).size();
+               for (size_t i = 0; ; ++i) {
+                       int xo;
+                       int yo;
+                       InsetBase const * inset = &it.inset();
+                       std::map<InsetBase const *, Point> const & data =
+                               c.bv().coordCache().getInsets().getData();
+                       std::map<InsetBase const *, Point>::const_iterator I = data.find(inset);
+
+                       // FIXME: in the case where the inset is not in the cache, this
+                       // means that no part of it is visible on screen. In this case
+                       // we don't do elaborate search and we just return the forwarded
+                       // DocIterator at its beginning.
+                       if (I == data.end()) {
+                               it.top().pos() = 0;
+                               return it;
+                       }
+
+                       Point o = I->second;
+                       inset->cursorPos(c.bv(), it.top(), c.boundary(), xo, yo);
+                       // Convert to absolute
+                       xo += o.x_;
+                       yo += o.y_;
                        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[Debug::DEBUG] << "i: " << i << " d: " << d << " best: " << best_dist << endl;
+                       lyxerr[Debug::DEBUG] << "i: " << i << " d: " << d
+                               << " best: " << best_dist << endl;
                        if (d <= best_dist) {
                                best_dist = d;
                                result = it;
@@ -115,34 +137,99 @@ namespace {
                int x, int y, int xlow, int xhigh, int ylow, int yhigh)
        {
                BOOST_ASSERT(!cursor.empty());
-               par_type beg, end;
-               CursorSlice bottom = cursor[0];
-               LyXText * text = bottom.text();
-               BOOST_ASSERT(text);
-               getParsInRange(text->paragraphs(), ylow, yhigh, beg, end);
+               InsetBase & inset = cursor[0].inset();
+               BufferView & bv = cursor.bv();
+
+               CoordCache::InnerParPosCache const & cache =
+                       bv.coordCache().getParPos().find(cursor.bottom().text())->second;
+               // Get an iterator on the first paragraph in the cache
+               DocIterator it(inset);
+               it.push_back(CursorSlice(inset));
+               it.pit() = cache.begin()->first;
+               // Get an iterator after the last paragraph in the cache
+               DocIterator et(inset);
+               et.push_back(CursorSlice(inset));
+               et.pit() = boost::prior(cache.end())->first;
+               if (et.pit() >= et.lastpit())
+                       et = doc_iterator_end(inset);
+               else
+                       ++et.pit();
 
-               DocIterator it = doc_iterator_begin(cursor.bv().buffer()->inset());
-               DocIterator et = doc_iterator_end(cursor.bv().buffer()->inset());
-               //lyxerr << "x: " << x << " y: " << y << endl;
-               //lyxerr << "xlow: " << xlow << " ylow: " << ylow << endl;
-               //lyxerr << "xhigh: " << xhigh << " yhigh: " << yhigh << endl;
+               double best_dist = std::numeric_limits<double>::max();;
+               DocIterator best_cursor = et;
 
-               it.par() = beg;
-               //et.par() = text->parOffset(end);
+               for ( ; it != et; it.forwardPos(true)) {
+                       // avoid invalid nesting when selecting
+                       if (!cursor.selection() || positionable(it, cursor.anchor_)) {
+                               Point p = bv_funcs::getPos(bv, it, false);
+                               int xo = p.x_;
+                               int yo = p.y_;
+                               if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
+                                       double const dx = xo - x;
+                                       double const dy = yo - y;
+                                       double const d = dx * dx + dy * dy;
+                                       // '<=' 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) {
+                                               //      lyxerr << "*" << endl;
+                                               best_dist   = d;
+                                               best_cursor = it;
+                                       }
+                               }
+                       }
+               }
 
-               double best_dist = 10e10;
-               DocIterator best_cursor = it;
+               if (best_cursor != et) {
+                       cursor.setCursor(best_cursor);
+                       return true;
+               }
+
+               return false;
+       }
+
+
+       /// moves position closest to (x, y) in given box
+       bool bruteFind3(LCursor & cur, int x, int y, bool up)
+       {
+               BufferView & bv = cur.bv();
+               int ylow  = up ? 0 : y + 1;
+               int yhigh = up ? y - 1 : bv.workHeight();
+               int xlow = 0;
+               int xhigh = bv.workWidth();
+
+// FIXME: bit more work needed to get 'from' and 'to' right.
+               pit_type from = cur.bottom().pit();
+               //pit_type to = cur.bottom().pit();
+               //lyxerr << "Pit start: " << from << endl;
+
+               //lyxerr << "bruteFind3: x: " << x << " y: " << y
+               //      << " xlow: " << xlow << " xhigh: " << xhigh
+               //      << " ylow: " << ylow << " yhigh: " << yhigh
+               //      << endl;
+               InsetBase & inset = bv.buffer()->inset();
+               DocIterator it = doc_iterator_begin(inset);
+               it.pit() = from;
+               DocIterator et = doc_iterator_end(inset);
+
+               double best_dist = std::numeric_limits<double>::max();
+               DocIterator best_cursor = et;
 
                for ( ; it != et; it.forwardPos()) {
                        // avoid invalid nesting when selecting
-                       if (!cursor.selection() || positionable(it, cursor.anchor_)) {
-                               int xo = 0, yo = 0;
-                               LCursor cur = cursor;
-                               cur.setCursor(it);
-                               cur.inset().getCursorPos(cur, xo, yo);
+                       if (bv_funcs::status(&bv, it) == bv_funcs::CUR_INSIDE
+                           && (!cur.selection() || positionable(it, cur.anchor_))) {
+                               Point p = bv_funcs::getPos(bv, it, false);
+                               int xo = p.x_;
+                               int yo = p.y_;
                                if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
-                                       double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
-                                       //lyxerr << "xo: " << xo << " yo: " << yo << " d: " << d << endl;
+                                       double const dx = xo - x;
+                                       double const dy = yo - y;
+                                       double const d = dx * dx + dy * dy;
+                                       //lyxerr << "itx: " << xo << " ity: " << yo << " d: " << d
+                                       //      << " dx: " << dx << " dy: " << dy
+                                       //      << " idx: " << it.idx() << " pos: " << it.pos()
+                                       //      << " it:\n" << it
+                                       //      << 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) {
@@ -155,18 +242,20 @@ namespace {
                }
 
                //lyxerr << "best_dist: " << best_dist << " cur:\n" << best_cursor << endl;
-               if (best_dist < 1e10)
-                       cursor.setCursor(best_cursor);
-               return best_dist < 1e10;
+               if (best_cursor == et)
+                       return false;
+               cur.setCursor(best_cursor);
+               return true;
        }
 
-
 } // namespace anon
 
 
+// be careful: this is called from the bv's constructor, too, so
+// bv functions are not yet available!
 LCursor::LCursor(BufferView & bv)
        : DocIterator(), bv_(&bv), anchor_(), x_target_(-1),
-         selection_(false), mark_(false)
+         selection_(false), mark_(false), logicalpos_(false)
 {}
 
 
@@ -190,23 +279,27 @@ void LCursor::setCursor(DocIterator const & cur)
 
 void LCursor::dispatch(FuncRequest const & cmd0)
 {
-       lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: " << cmd0 << endl << *this << endl;
+       lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
+                            << " cmd: " << cmd0 << '\n'
+                            << *this << endl;
        if (empty())
                return;
 
+       fixIfBroken();
        FuncRequest cmd = cmd0;
        LCursor safe = *this;
 
-       for (; size(); pop()) {
-               lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: " << cmd0 << endl << *this << endl;
+       for (; depth(); pop()) {
+               lyxerr[Debug::DEBUG] << "LCursor::dispatch: cmd: "
+                       << cmd0 << endl << *this << endl;
                BOOST_ASSERT(pos() <= lastpos());
                BOOST_ASSERT(idx() <= lastidx());
-               BOOST_ASSERT(par() <= lastpar());
+               BOOST_ASSERT(pit() <= lastpit());
 
                // 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_.update(Update::FitCursor | Update::Force);
                disp_.dispatched(true);
                inset().dispatch(*this, cmd);
                if (disp_.dispatched())
@@ -217,6 +310,7 @@ void LCursor::dispatch(FuncRequest const & cmd0)
        if (!disp_.dispatched()) {
                lyxerr[Debug::DEBUG] << "RESTORING OLD CURSOR!" << endl;
                operator=(safe);
+               disp_.update(Update::None);
                disp_.dispatched(false);
        }
 }
@@ -228,45 +322,6 @@ DispatchResult LCursor::result() const
 }
 
 
-bool LCursor::getStatus(FuncRequest const & cmd, FuncStatus & status)
-{
-       // This is, of course, a mess. Better create a new doc iterator and use
-       // this in Inset::getStatus. This might require an additional
-       // BufferView * arg, though (which should be avoided)
-       LCursor safe = *this;
-       bool res = false;
-       for ( ; size(); pop()) {
-               //lyxerr << "\nLCursor::getStatus: cmd: " << cmd << endl << *this << endl;
-               if (idx() > lastidx()) {
-                       lyxerr << "wrong idx " << idx() << ", max is " << lastidx()
-                               << ". Trying to correct this."  << endl;
-                       idx() = lastidx();
-               }
-               if (par() > lastpar()) {
-                       lyxerr << "wrong par " << par() << ", max is " << lastpar()
-                               << ". Trying to correct this."  << endl;
-                       par() = lastpar();
-               }
-               if (pos() > lastpos()) {
-                       lyxerr << "wrong pos " << pos() << ", max is " << lastpos()
-                               << ". Trying to correct this."  << endl;
-                       pos() = lastpos();
-               }
-
-               // 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)) {
-                       res = true;
-                       break;
-               }
-       }
-       operator=(safe);
-       return res;
-}
-
-
 BufferView & LCursor::bv() const
 {
        BOOST_ASSERT(bv_);
@@ -284,7 +339,7 @@ Buffer & LCursor::buffer() const
 
 void LCursor::pop()
 {
-       BOOST_ASSERT(size() >= 1);
+       BOOST_ASSERT(depth() >= 1);
        pop_back();
 }
 
@@ -320,11 +375,12 @@ bool LCursor::popRight()
 {
        BOOST_ASSERT(!empty());
        //lyxerr << "Leaving inset to the right" << endl;
+       const pos_type lp = (depth() > 1) ? (*this)[depth() - 2].lastpos() : 0;
        inset().notifyCursorLeaves(*this);
        if (depth() == 1)
                return false;
        pop();
-       ++pos();
+       pos() += lastpos() - lp + 1;
        return true;
 }
 
@@ -332,7 +388,7 @@ bool LCursor::popRight()
 int LCursor::currentMode()
 {
        BOOST_ASSERT(!empty());
-       for (int i = size() - 1; i >= 0; --i) {
+       for (int i = depth() - 1; i >= 0; --i) {
                int res = operator[](i).inset().currentMode();
                if (res != InsetBase::UNDECIDED_MODE)
                        return res;
@@ -341,37 +397,19 @@ int LCursor::currentMode()
 }
 
 
-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(*this, x, y);
+       Point p = bv_funcs::getPos(bv(), *this, boundary());
+       x = p.x_;
+       y = p.y_;
 }
 
 
-void LCursor::paste(string const & data)
+Row const & LCursor::textRow() const
 {
-       dispatch(FuncRequest(LFUN_PASTE, data));
+       ParagraphMetrics const & pm = bv().parMetrics(text(), pit());
+       BOOST_ASSERT(!pm.rows().empty());
+       return pm.getRow(pos(), boundary());
 }
 
 
@@ -402,9 +440,9 @@ bool LCursor::posRight()
 
 CursorSlice LCursor::anchor() const
 {
-       BOOST_ASSERT(anchor_.size() >= size());
-       CursorSlice normal = anchor_[size() - 1];
-       if (size() < anchor_.size() && back() <= normal) {
+       BOOST_ASSERT(anchor_.depth() >= depth());
+       CursorSlice normal = anchor_[depth() - 1];
+       if (depth() < anchor_.depth() && top() <= normal) {
                // anchor is behind cursor -> move anchor behind the inset
                ++normal.pos();
        }
@@ -415,16 +453,16 @@ CursorSlice LCursor::anchor() const
 CursorSlice LCursor::selBegin() const
 {
        if (!selection())
-               return back();
-       return anchor() < back() ? anchor() : back();
+               return top();
+       return anchor() < top() ? anchor() : top();
 }
 
 
 CursorSlice LCursor::selEnd() const
 {
        if (!selection())
-               return back();
-       return anchor() > back() ? anchor() : back();
+               return top();
+       return anchor() > top() ? anchor() : top();
 }
 
 
@@ -432,7 +470,9 @@ DocIterator LCursor::selectionBegin() const
 {
        if (!selection())
                return *this;
-       return anchor() < back() ? anchor_ : *this;
+       DocIterator di = (anchor() < top() ? anchor_ : *this);
+       di.resize(depth());
+       return di;
 }
 
 
@@ -440,23 +480,28 @@ DocIterator LCursor::selectionEnd() const
 {
        if (!selection())
                return *this;
-       return anchor() > back() ? anchor_ : *this;
+       DocIterator di = (anchor() > top() ? anchor_ : *this);
+       if (di.depth() > depth()) {
+               di.resize(depth());
+               ++di.pos();
+       }
+       return di;
 }
 
 
 void LCursor::setSelection()
 {
        selection() = true;
-       // a selection with no contents is not a selection
+       // A selection with no contents is not a selection
 #ifdef WITH_WARNINGS
 #warning doesnt look ok
 #endif
-       if (par() == anchor().par() && pos() == anchor().pos())
+       if (pit() == anchor().pit() && pos() == anchor().pos())
                selection() = false;
 }
 
 
-void LCursor::setSelection(DocIterator const & where, size_t n)
+void LCursor::setSelection(DocIterator const & where, int n)
 {
        setCursor(where);
        selection() = true;
@@ -470,7 +515,6 @@ void LCursor::clearSelection()
        selection() = false;
        mark() = false;
        resetAnchor();
-       bv().unsetXSel();
 }
 
 
@@ -493,42 +537,48 @@ void LCursor::clearTargetX()
 
 
 
-void LCursor::info(std::ostream & os) const
+void LCursor::info(odocstream & os) const
 {
        for (int i = 1, n = depth(); i < n; ++i) {
                operator[](i).inset().infoize(os);
                os << "  ";
        }
-       if (pos() != 0)
-               prevInset()->infoize2(os);
+       if (pos() != 0) {
+               InsetBase const * inset = prevInset();
+               // prevInset() can return 0 in certain case.
+               if (inset)
+                       prevInset()->infoize2(os);
+       }
        // overwite old message
        os << "                    ";
 }
 
 
-void LCursor::selHandle(bool sel)
+bool LCursor::selHandle(bool sel)
 {
        //lyxerr << "LCursor::selHandle" << endl;
        if (sel == selection())
-               return;
+               return false;
 
        resetAnchor();
        selection() = sel;
+       cap::saveSelection(*this);
+       return true;
 }
 
 
 std::ostream & operator<<(std::ostream & os, LCursor const & cur)
 {
        os << "\n cursor:                                | anchor:\n";
-       for (size_t i = 0, n = cur.size(); i != n; ++i) {
-               os << " " << cur.operator[](i) << " | ";
-               if (i < cur.anchor_.size())
+       for (size_t i = 0, n = cur.depth(); i != n; ++i) {
+               os << " " << cur[i] << " | ";
+               if (i < cur.anchor_.depth())
                        os << cur.anchor_[i];
                else
                        os << "-------------------------------";
                os << "\n";
        }
-       for (size_t i = cur.size(), n = cur.anchor_.size(); i < n; ++i) {
+       for (size_t i = cur.depth(), n = cur.anchor_.depth(); i < n; ++i) {
                os << "------------------------------- | " << cur.anchor_[i] << "\n";
        }
        os << " selection: " << cur.selection_
@@ -536,38 +586,51 @@ std::ostream & operator<<(std::ostream & os, LCursor const & cur)
        return os;
 }
 
-
+} // namespace lyx
 
 
 ///////////////////////////////////////////////////////////////////
 //
 // 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).
+// back to mathed (in most cases to InsetMathNest).
 //
 ///////////////////////////////////////////////////////////////////
 
-#include "mathed/math_charinset.h"
-#include "mathed/math_factory.h"
-#include "mathed/math_gridinset.h"
-#include "mathed/math_macroarg.h"
-#include "mathed/math_mathmlstream.h"
-#include "mathed/math_scriptinset.h"
-#include "mathed/math_support.h"
-#include "mathed/math_unknowninset.h"
+#include "mathed/InsetMathChar.h"
+#include "mathed/InsetMathGrid.h"
+#include "mathed/InsetMathScript.h"
+#include "mathed/InsetMathUnknown.h"
+#include "mathed/MathFactory.h"
+#include "mathed/MathStream.h"
+#include "mathed/MathSupport.h"
+
+
+namespace lyx {
 
 //#define FILEDEBUG 1
 
 
 bool LCursor::isInside(InsetBase const * p)
 {
-       for (unsigned i = 0; i < depth(); ++i)
+       for (size_t i = 0; i != depth(); ++i)
                if (&operator[](i).inset() == p)
                        return true;
        return false;
 }
 
 
+void LCursor::leaveInset(InsetBase const & inset)
+{
+       for (size_t i = 0; i != depth(); ++i) {
+               if (&operator[](i).inset() == &inset) {
+                       resize(i);
+                       return;
+               }
+       }
+}
+
+
 bool LCursor::openable(MathAtom const & t) const
 {
        if (!t->isActive())
@@ -580,7 +643,7 @@ bool LCursor::openable(MathAtom const & t) const
                return true;
 
        // we can't move into anything new during selection
-       if (depth() >= anchor_.size())
+       if (depth() >= anchor_.depth())
                return false;
        if (!ptr_cmp(t.nucleus(), &anchor_[depth()].inset()))
                return false;
@@ -605,7 +668,7 @@ void LCursor::plainErase()
 
 void LCursor::markInsert()
 {
-       insert(char(0));
+       insert(char_type(0));
 }
 
 
@@ -622,21 +685,21 @@ void LCursor::plainInsert(MathAtom const & t)
 }
 
 
-void LCursor::insert(string const & str)
+void LCursor::insert(docstring const & str)
 {
-       //lyxerr << "LCursor::insert str '" << str << "'" << endl;
-       for (string::const_iterator it = str.begin(); it != str.end(); ++it)
-               insert(*it);
+       for_each(str.begin(), str.end(),
+                boost::bind(static_cast<void(LCursor::*)(char_type)>
+                            (&LCursor::insert), this, _1));
 }
 
 
-void LCursor::insert(char c)
+void LCursor::insert(char_type c)
 {
        //lyxerr << "LCursor::insert char '" << c << "'" << endl;
        BOOST_ASSERT(!empty());
        if (inMathed()) {
-               lyx::cap::selClearOrDel(*this);
-               insert(new MathCharInset(c));
+               cap::selClearOrDel(*this);
+               insert(new InsetMathChar(c));
        } else {
                text()->insertChar(*this, c);
        }
@@ -647,7 +710,7 @@ void LCursor::insert(MathAtom const & t)
 {
        //lyxerr << "LCursor::insert MathAtom '" << t << "'" << endl;
        macroModeClose();
-       lyx::cap::selClearOrDel(*this);
+       cap::selClearOrDel(*this);
        plainInsert(t);
 }
 
@@ -661,7 +724,7 @@ void LCursor::insert(InsetBase * inset)
 }
 
 
-void LCursor::niceInsert(string const & t)
+void LCursor::niceInsert(docstring const & t)
 {
        MathArray ar;
        asArray(t, ar);
@@ -675,7 +738,7 @@ void LCursor::niceInsert(string const & t)
 void LCursor::niceInsert(MathAtom const & t)
 {
        macroModeClose();
-       string safe = lyx::cap::grabAndEraseSelection(*this);
+       docstring const safe = cap::grabAndEraseSelection(*this);
        plainInsert(t);
        // enter the new inset and move the contents of the selection if possible
        if (t->isActive()) {
@@ -683,7 +746,10 @@ void LCursor::niceInsert(MathAtom const & t)
                // be careful here: don't use 'pushLeft(t)' as this we need to
                // push the clone, not the original
                pushLeft(*nextInset());
-               paste(safe);
+               // We may not use niceInsert here (recursion)
+               MathArray ar;
+               asArray(safe, ar);
+               insert(ar);
        }
 }
 
@@ -692,7 +758,7 @@ void LCursor::insert(MathArray const & ar)
 {
        macroModeClose();
        if (selection())
-               lyx::cap::eraseSelection(*this);
+               cap::eraseSelection(*this);
        cell().insert(pos(), ar);
        pos() += ar.size();
 }
@@ -703,19 +769,31 @@ bool LCursor::backspace()
        autocorrect() = false;
 
        if (selection()) {
-               lyx::cap::selDel(*this);
+               cap::eraseSelection(*this);
                return true;
        }
 
        if (pos() == 0) {
-               if (inset().nargs() == 1 && depth() == 1 && lastpos() == 0)
+               // If empty cell, and not part of a big cell
+               if (lastpos() == 0 && inset().nargs() == 1) {
+                       popLeft();
+                       // Directly delete empty cell: [|[]] => [|] 
+                       if (inMathed()) {
+                               plainErase();
+                               resetAnchor();
+                               return true;
+                       }
+                       // [|], can not delete from inside
                        return false;
-               pullArg();
-               return true;
+               } else {
+                       // move to left
+                       popLeft();
+                       return true;
+               }
        }
 
        if (inMacroMode()) {
-               MathUnknownInset * p = activeMacro();
+               InsetMathUnknown * p = activeMacro();
                if (p->name().size() > 1) {
                        p->setName(p->name().substr(0, p->name().size() - 1));
                        return true;
@@ -743,7 +821,7 @@ bool LCursor::erase()
                return true;
 
        if (selection()) {
-               lyx::cap::selDel(*this);
+               cap::eraseSelection(*this);
                return true;
        }
 
@@ -754,18 +832,25 @@ bool LCursor::erase()
        // special behaviour when in last position of cell
        if (pos() == lastpos()) {
                bool one_cell = inset().nargs() == 1;
-               if (one_cell && depth() == 1 && lastpos() == 0)
+               if (one_cell && lastpos() == 0) {
+                       popLeft();
+                       // Directly delete empty cell: [|[]] => [|] 
+                       if (inMathed()) {
+                               plainErase();
+                               resetAnchor();
+                               return true;
+                       }
+                       // [|], can not delete from inside
                        return false;
+               }
                // remove markup
-               if (one_cell)
-                       pullArg();
-               else
+               if (!one_cell)
                        inset().idxGlue(idx());
                return true;
        }
 
        // 'clever' UI hack: only erase large items if previously slected
-       if (pos() != lastpos() && inset().nargs() > 0) {
+       if (pos() != lastpos() && nextAtom()->nargs() > 0) {
                resetAnchor();
                selection() = true;
                ++pos();
@@ -801,36 +886,39 @@ bool LCursor::down()
 }
 
 
-void LCursor::macroModeClose()
+bool LCursor::macroModeClose()
 {
        if (!inMacroMode())
-               return;
-       MathUnknownInset * p = activeMacro();
+               return false;
+       InsetMathUnknown * p = activeMacro();
        p->finalize();
-       string s = p->name();
+       docstring const s = p->name();
        --pos();
        cell().erase(pos());
 
        // do nothing if the macro name is empty
        if (s == "\\")
-               return;
-
-       string const name = s.substr(1);
+               return false;
 
        // prevent entering of recursive macros
        // FIXME: this is only a weak attempt... only prevents immediate
        // recursion
+       docstring const name = s.substr(1);
        InsetBase const * macro = innerInsetOfType(InsetBase::MATHMACRO_CODE);
        if (macro && macro->getInsetName() == name)
                lyxerr << "can't enter recursive macro" << endl;
 
-       plainInsert(createMathInset(name));
+       InsetMathNest * const in = inset().asInsetMath()->asNestInset();
+       if (in && in->interpretString(*this, s))
+               return true;
+       plainInsert(createInsetMath(name));
+       return true;
 }
 
 
-string LCursor::macroName()
+docstring LCursor::macroName()
 {
-       return inMacroMode() ? activeMacro()->name() : string();
+       return inMacroMode() ? activeMacro()->name() : docstring();
 }
 
 
@@ -838,7 +926,7 @@ void LCursor::handleNest(MathAtom const & a, int c)
 {
        //lyxerr << "LCursor::handleNest: " << c << endl;
        MathAtom t = a;
-       asArray(lyx::cap::grabAndEraseSelection(*this), t.nucleus()->cell(c));
+       asArray(cap::grabAndEraseSelection(*this), t.nucleus()->cell(c));
        insert(t);
        posLeft();
        pushLeft(*nextInset());
@@ -856,16 +944,25 @@ int LCursor::targetX() const
 }
 
 
+void LCursor::setTargetX()
+{
+       int x;
+       int y;
+       getPos(x, y);
+       x_target_ = x;
+}
+
+
 bool LCursor::inMacroMode() const
 {
        if (pos() == 0)
                return false;
-       MathUnknownInset const * p = prevAtom()->asUnknownInset();
+       InsetMathUnknown const * p = prevAtom()->asUnknownInset();
        return p && !p->final();
 }
 
 
-MathUnknownInset * LCursor::activeMacro()
+InsetMathUnknown * LCursor::activeMacro()
 {
        return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
 }
@@ -903,22 +1000,23 @@ void LCursor::touch()
 
 void LCursor::normalize()
 {
-       if (idx() >= nargs()) {
+       if (idx() > lastidx()) {
                lyxerr << "this should not really happen - 1: "
                       << idx() << ' ' << nargs()
                       << " in: " << &inset() << endl;
+               idx() = lastidx();
        }
-       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;
+               odocstringstream os;
+               WriteStream wi(os, false, true);
+               inset().asInsetMath()->write(wi);
+               lyxerr << to_utf8(os.str()) << endl;
+               pos() = lastpos();
        }
-       pos() = min(pos(), lastpos());
 }
 
 
@@ -933,7 +1031,8 @@ bool LCursor::goUpDown(bool up)
        int yo = 0;
        getPos(xo, yo);
 
-       // check if we had something else in mind, if not, this is the future goal
+       // check if we had something else in mind, if not, this is the future
+       // target
        if (x_target() == -1)
                x_target() = xo;
        else
@@ -943,34 +1042,34 @@ bool LCursor::goUpDown(bool up)
        if (!selection()) {
                // try left
                if (pos() != 0) {
-                       MathScriptInset const * p = prevAtom()->asScriptInset();
+                       InsetMathScript const * p = prevAtom()->asScriptInset();
                        if (p && p->has(up)) {
                                --pos();
-                               push(inset());
-                               idx() = up; // the superscript has index 1
+                               push(*const_cast<InsetMathScript*>(p));
+                               idx() = p->idxOfScript(up);
                                pos() = lastpos();
-                               //lyxerr << "updown: handled by scriptinset to the left" << endl;
                                return true;
                        }
                }
 
                // try right
                if (pos() != lastpos()) {
-                       MathScriptInset const * p = nextAtom()->asScriptInset();
+                       InsetMathScript const * p = nextAtom()->asScriptInset();
                        if (p && p->has(up)) {
-                               push(inset());
-                               idx() = up;
+                               push(*const_cast<InsetMathScript*>(p));
+                               idx() = p->idxOfScript(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;
+// FIXME: Switch this on for more robust movement
+#if 0
 
+       return bruteFind3(*this, xo, yo, up);
+
+#else
        //xarray().boundingBox(xlow, xhigh, ylow, yhigh);
        //if (up)
        //      yhigh = yo - 4;
@@ -982,10 +1081,11 @@ bool LCursor::goUpDown(bool up)
        //}
 
        // try to find an inset that knows better then we
-       while (1) {
+       while (true) {
                //lyxerr << "updown: We are in " << &inset() << " idx: " << idx() << endl;
                // ask inset first
                if (inset().idxUpDown(*this, up)) {
+                       //lyxerr << "idxUpDown triggered" << endl;
                        // try to find best position within this inset
                        if (!selection())
                                setCursor(bruteFind2(*this, xo, yo));
@@ -993,15 +1093,17 @@ bool LCursor::goUpDown(bool up)
                }
 
                // no such inset found, just take something "above"
-               //lyxerr << "updown: handled by strange case" << endl;
                if (!popLeft()) {
+                       //lyxerr << "updown: popleft failed (strange case)" << endl;
                        int ylow  = up ? 0 : yo + 1;
                        int yhigh = up ? yo - 1 : bv().workHeight();
                        return bruteFind(*this, xo, yo, 0, bv().workWidth(), ylow, yhigh);
                }
 
                // any improvement so far?
-               int xnew, ynew;
+               //lyxerr << "updown: popLeft succeeded" << endl;
+               int xnew;
+               int ynew;
                getPos(xnew, ynew);
                if (up ? ynew < yo : ynew > yo)
                        return true;
@@ -1009,16 +1111,17 @@ bool LCursor::goUpDown(bool up)
 
        // we should not come here.
        BOOST_ASSERT(false);
+#endif
 }
 
 
 void LCursor::handleFont(string const & font)
 {
        lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << ": " << font << endl;
-       string safe;
+       docstring safe;
        if (selection()) {
                macroModeClose();
-               safe = lyx::cap::grabAndEraseSelection(*this);
+               safe = cap::grabAndEraseSelection(*this);
        }
 
        if (lastpos() != 0) {
@@ -1032,7 +1135,7 @@ void LCursor::handleFont(string const & font)
                } else {
                        // cursor in between. split cell
                        MathArray::iterator bt = cell().begin();
-                       MathAtom at = createMathInset(font);
+                       MathAtom at = createInsetMath(from_utf8(font));
                        at.nucleus()->cell(0) = MathArray(bt, bt + pos());
                        cell().erase(bt, bt + pos());
                        popLeft();
@@ -1047,30 +1150,30 @@ void LCursor::handleFont(string const & font)
 }
 
 
-void LCursor::message(string const & msg) const
+void LCursor::message(docstring const & msg) const
 {
-       bv().owner()->getLyXFunc().setMessage(msg);
+       theLyXFunc().setMessage(msg);
 }
 
 
-void LCursor::errorMessage(string const & msg) const
+void LCursor::errorMessage(docstring const & msg) const
 {
-       bv().owner()->getLyXFunc().setErrorMessage(msg);
+       theLyXFunc().setErrorMessage(msg);
 }
 
 
-string LCursor::selectionAsString(bool label) const
+docstring LCursor::selectionAsString(bool label) const
 {
        if (!selection())
-               return string();
+               return docstring();
 
        if (inTexted()) {
                Buffer const & buffer = *bv().buffer();
-               ParagraphList & pars = text()->paragraphs();
+               ParagraphList const & pars = text()->paragraphs();
 
                // should be const ...
-               par_type startpit = selBegin().par();
-               par_type endpit = selEnd().par();
+               pit_type startpit = selBegin().pit();
+               pit_type endpit = selEnd().pit();
                size_t const startpos = selBegin().pos();
                size_t const endpos = selEnd().pos();
 
@@ -1078,12 +1181,12 @@ string LCursor::selectionAsString(bool label) const
                        return pars[startpit].asString(buffer, startpos, endpos, label);
 
                // First paragraph in selection
-               string result = pars[startpit].
+               docstring result = pars[startpit].
                        asString(buffer, startpos, pars[startpit].size(), label) + "\n\n";
 
                // The paragraphs in between (if any)
-               for (par_type pit = startpit + 1; pit != endpit; ++pit) {
-                       Paragraph & par = pars[pit];
+               for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
+                       Paragraph const & par = pars[pit];
                        result += par.asString(buffer, 0, par.size(), label) + "\n\n";
                }
 
@@ -1093,31 +1196,31 @@ string LCursor::selectionAsString(bool label) const
                return result;
        }
 
-#ifdef WITH_WARNINGS
-#warning and mathed?
-#endif
-       return string();
+       if (inMathed())
+               return cap::grabSelection(*this);
+
+       return docstring();
 }
 
 
-string LCursor::currentState()
+docstring LCursor::currentState()
 {
        if (inMathed()) {
-               std::ostringstream os;
+               odocstringstream os;
                info(os);
                return os.str();
        }
 
        if (inTexted())
-        return text()->currentState(*this);
+               return text()->currentState(*this);
 
-       return string();
+       return docstring();
 }
 
 
-string LCursor::getPossibleLabel()
+docstring LCursor::getPossibleLabel()
 {
-       return inMathed() ? "eq:" : text()->getPossibleLabel(*this);
+       return inMathed() ? from_ascii("eq:") : text()->getPossibleLabel(*this);
 }
 
 
@@ -1130,13 +1233,13 @@ Encoding const * LCursor::getEncoding() const
        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)
+       for (s = depth() - 1; s >= 0; --s)
                if (operator[](s).text())
                        break;
        CursorSlice const & sl = operator[](s);
-       LyXText & text = *sl.text();
-       LyXFont font = text.getPar(sl.par()).getFont(
-               bv().buffer()->params(), sl.pos(), outerFont(sl.par(), text.paragraphs()));
+       LyXText const & text = *sl.text();
+       LyXFont font = text.getPar(sl.pit()).getFont(
+               bv().buffer()->params(), sl.pos(), outerFont(sl.pit(), text.paragraphs()));
        return font.language()->encoding();
 }
 
@@ -1153,13 +1256,74 @@ void LCursor::dispatched()
 }
 
 
-void LCursor::needsUpdate()
+void LCursor::updateFlags(Update::flags f)
 {
-       disp_.update(true);
+       disp_.update(f);
 }
 
 
 void LCursor::noUpdate()
 {
-       disp_.update(false);
+       disp_.update(Update::None);
+}
+
+
+LyXFont LCursor::getFont() const
+{
+       // HACK. far from being perfect...
+       int s = 0;
+       // go up until first non-0 text is hit
+       // (innermost text is 0 in mathed)
+       for (s = depth() - 1; s >= 0; --s)
+               if (operator[](s).text())
+                       break;
+       CursorSlice const & sl = operator[](s);
+       LyXText const & text = *sl.text();
+       LyXFont font = text.getPar(sl.pit()).getFont(
+               bv().buffer()->params(),
+               sl.pos(),
+               outerFont(sl.pit(), text.paragraphs()));
+
+       return font;
+}
+
+
+void LCursor::fixIfBroken()
+{
+       // find out last good level
+       LCursor copy = *this;
+       size_t newdepth = depth();
+       while (!copy.empty()) {
+               if (copy.idx() > copy.lastidx()) {
+                       lyxerr << "wrong idx " << copy.idx()
+                              << ", max is " << copy.lastidx()
+                              << " at level " << copy.depth()
+                              << ". Trying to correct this."  << endl;
+                       newdepth = copy.depth() - 1;
+               }
+               else if (copy.pit() > copy.lastpit()) {
+                       lyxerr << "wrong pit " << copy.pit()
+                              << ", max is " << copy.lastpit()
+                              << " at level " << copy.depth()
+                              << ". Trying to correct this."  << endl;
+                       newdepth = copy.depth() - 1;
+               }
+               else if (copy.pos() > copy.lastpos()) {
+                       lyxerr << "wrong pos " << copy.pos()
+                              << ", max is " << copy.lastpos()
+                              << " at level " << copy.depth()
+                              << ". Trying to correct this."  << endl;
+                       newdepth = copy.depth() - 1;
+               }
+               copy.pop();
+       }
+       // shrink cursor to a size where everything is valid, possibly
+       // leaving insets
+       while (depth() > newdepth) {
+               pop();
+               lyxerr << "correcting cursor to level " << depth() << endl;
+       }
 }
+
+
+} // namespace lyx