+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_.depth())
+ return false;
+ if (!ptr_cmp(t.nucleus(), &anchor_[depth()].inset()))
+ return false;
+
+ return true;
+}
+
+
+void LCursor::setScreenPos(int x, int y)
+{
+ x_target() = x;
+ bruteFind(*this, x, y, 0, bv().workWidth(), 0, bv().workHeight());
+}
+
+
+
+void LCursor::plainErase()
+{
+ cell().erase(pos());
+}
+
+
+void LCursor::markInsert()
+{
+ insert(char(0));
+}
+
+
+void LCursor::markErase()
+{
+ cell().erase(pos());
+}
+
+
+void LCursor::plainInsert(MathAtom const & t)
+{
+ cell().insert(pos(), t);
+ ++pos();
+}
+
+
+void LCursor::insert(string const & str)
+{
+ for_each(str.begin(), str.end(),
+ boost::bind(static_cast<void(LCursor::*)(char)>
+ (&LCursor::insert), this, _1));
+}
+
+
+void LCursor::insert(char c)
+{
+ //lyxerr << "LCursor::insert char '" << c << "'" << endl;
+ BOOST_ASSERT(!empty());
+ if (inMathed()) {
+ lyx::cap::selClearOrDel(*this);
+ insert(new MathCharInset(c));
+ } else {
+ text()->insertChar(*this, c);
+ }
+}
+
+
+void LCursor::insert(MathAtom const & t)
+{
+ //lyxerr << "LCursor::insert MathAtom '" << t << "'" << endl;
+ macroModeClose();
+ lyx::cap::selClearOrDel(*this);
+ 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 const safe = lyx::cap::grabAndEraseSelection(*this);
+ 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())
+ lyx::cap::eraseSelection(*this);
+ cell().insert(pos(), ar);
+ pos() += ar.size();
+}
+
+
+bool LCursor::backspace()
+{
+ autocorrect() = false;
+
+ if (selection()) {
+ lyx::cap::selDel(*this);
+ 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
+ resetAnchor();
+ selection() = true;
+ --pos();
+ } else {
+ --pos();
+ plainErase();
+ }
+ return true;
+}
+
+
+bool LCursor::erase()
+{
+ autocorrect() = false;
+ if (inMacroMode())
+ return true;
+
+ if (selection()) {
+ lyx::cap::selDel(*this);
+ 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;
+ }
+
+ // 'clever' UI hack: only erase large items if previously slected
+ if (pos() != lastpos() && inset().nargs() > 0) {
+ resetAnchor();
+ selection() = true;
+ ++pos();
+ } else {
+ plainErase();
+ }
+
+ return true;
+}
+
+
+bool LCursor::up()
+{
+ macroModeClose();
+ DocIterator save = *this;
+ if (goUpDown(true))
+ return true;
+ setCursor(save);
+ autocorrect() = false;
+ return selection();
+}
+
+
+bool LCursor::down()
+{
+ macroModeClose();
+ DocIterator save = *this;
+ if (goUpDown(false))
+ return true;
+ setCursor(save);
+ autocorrect() = false;
+ return selection();
+}
+
+
+void LCursor::macroModeClose()
+{
+ if (!inMacroMode())
+ return;
+ MathUnknownInset * p = activeMacro();
+ p->finalize();
+ string 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);
+
+ // prevent entering of recursive macros
+ // FIXME: this is only a weak attempt... only prevents immediate
+ // recursion
+ InsetBase const * macro = innerInsetOfType(InsetBase::MATHMACRO_CODE);
+ if (macro && macro->getInsetName() == name)
+ lyxerr << "can't enter recursive macro" << endl;
+
+ plainInsert(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(lyx::cap::grabAndEraseSelection(*this), 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;
+}
+
+
+void LCursor::setTargetX()
+{
+ // For now this is good enough. A better solution would be to
+ // avoid this rebreak by setting cursorX only after drawing
+ bottom().text()->redoParagraph(bottom().pit());
+ int x;
+ int y;
+ getPos(x, y);
+ x_target_ = x;
+}
+
+
+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;
+}
+
+
+void LCursor::pullArg()
+{
+#ifdef WITH_WARNINGS
+#warning Look here
+#endif
+ MathArray ar = cell();
+ if (popLeft() && inMathed()) {
+ plainErase();
+ cell().insert(pos(), ar);
+ resetAnchor();
+ } else {
+ //formula()->mutateToText();
+ }
+}
+
+
+void LCursor::touch()
+{
+#ifdef WITH_WARNINGS
+#warning look here
+#endif
+#if 0
+ DocIterator::const_iterator it = begin();
+ DocIterator::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());
+}
+
+
+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;
+ }
+ }
+ }
+
+ //xarray().boundingBox(xlow, xhigh, ylow, yhigh);
+ //if (up)
+ // yhigh = yo - 4;
+ //else
+ // ylow = yo + 4;
+ //if (bruteFind(*this, 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 (true) {
+ //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())
+ setCursor(bruteFind2(*this, xo, yo));
+ return true;
+ }
+
+ // no such inset found, just take something "above"
+ //lyxerr << "updown: handled by strange case" << endl;
+ if (!popLeft()) {
+ 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;
+ int ynew;
+ getPos(xnew, ynew);
+ if (up ? ynew < yo : ynew > yo)
+ return true;
+ }
+
+ // we should not come here.
+ BOOST_ASSERT(false);
+}
+
+
+void LCursor::handleFont(string const & font)
+{
+ lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << ": " << font << endl;
+ string safe;
+ if (selection()) {
+ macroModeClose();
+ safe = lyx::cap::grabAndEraseSelection(*this);
+ }
+
+ 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();
+ ParagraphList & pars = text()->paragraphs();
+
+ // should be const ...
+ pit_type startpit = selBegin().pit();
+ pit_type endpit = selEnd().pit();
+ size_t const startpos = selBegin().pos();
+ size_t const endpos = selEnd().pos();
+
+ if (startpit == endpit)
+ return pars[startpit].asString(buffer, startpos, endpos, label);
+
+ // First paragraph in selection
+ string result = pars[startpit].
+ asString(buffer, startpos, pars[startpit].size(), label) + "\n\n";
+
+ // The paragraphs in between (if any)
+ for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
+ Paragraph & par = pars[pit];
+ result += par.asString(buffer, 0, par.size(), label) + "\n\n";
+ }
+
+ // Last paragraph in selection
+ result += pars[endpit].asString(buffer, 0, endpos, label);
+
+ return result;
+ }
+
+#ifdef WITH_WARNINGS
+#warning and mathed?
+#endif
+ return string();
+}
+
+
+string LCursor::currentState()
+{
+ if (inMathed()) {
+ std::ostringstream os;
+ info(os);
+ return os.str();
+ }
+
+ if (inTexted())
+ return text()->currentState(*this);
+
+ return string();
+}
+
+
+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 = 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.language()->encoding();
+}
+
+
+void LCursor::undispatched()
+{
+ disp_.dispatched(false);
+}
+
+
+void LCursor::dispatched()
+{
+ disp_.dispatched(true);
+}
+
+
+void LCursor::needsUpdate()
+{
+ disp_.update(true);
+}
+
+
+void LCursor::noUpdate()
+{
+ disp_.update(false);
+}
+
+
+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;