3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Alejandro Aguilar Sierra
9 * Full author contact details are available in file CREDITS.
16 #include "support/LAssert.h"
17 #include "support/limited_stack.h"
19 #include "support/std_sstream.h"
20 #include "math_cursor.h"
21 #include "formulabase.h"
22 #include "funcrequest.h"
23 #include "math_braceinset.h"
24 #include "math_commentinset.h"
25 #include "math_charinset.h"
26 #include "math_factory.h"
27 #include "math_gridinset.h"
28 #include "math_macroarg.h"
29 #include "math_macrotemplate.h"
30 #include "math_mathmlstream.h"
31 #include "math_scriptinset.h"
32 #include "math_spaceinset.h"
33 #include "math_support.h"
34 #include "math_unknowninset.h"
39 using namespace lyx::support;
46 using std::ostringstream;
50 // matheds own cut buffer
51 limited_stack<string> theCutBuffer;
54 MathCursor::MathCursor(InsetFormulaBase * formula, bool front)
55 : formula_(formula), autocorrect_(false), selection_(false), targetx_(-1)
57 front ? first() : last();
62 MathCursor::~MathCursor()
64 // ensure that 'notifyCursorLeave' is called
70 void MathCursor::push(MathAtom & t)
72 Cursor_.push_back(CursorPos(t.nucleus()));
76 void MathCursor::pushLeft(MathAtom & t)
78 //lyxerr << "Entering atom " << t << " left" << endl;
80 t->idxFirst(idx(), pos());
84 void MathCursor::pushRight(MathAtom & t)
86 //lyxerr << "Entering atom " << t << " right" << endl;
89 t->idxLast(idx(), pos());
93 bool MathCursor::popLeft()
95 //lyxerr << "Leaving atom to the left" << endl;
98 inset()->notifyCursorLeaves(idx());
101 inset()->notifyCursorLeaves(idx());
107 bool MathCursor::popRight()
109 //lyxerr << "Leaving atom "; inset()->write(cerr, false); cerr << " right" << endl;
112 inset()->notifyCursorLeaves(idx());
115 inset()->notifyCursorLeaves(idx());
124 void MathCursor::dump(char const * what) const
126 lyxerr << "MC: " << what << endl;
127 lyxerr << " Cursor: " << depth() << endl;
128 for (unsigned i = 0; i < depth(); ++i)
129 lyxerr << " i: " << i << ' ' << Cursor_[i] << endl;
130 lyxerr << " Anchor: " << Anchor_.size() << endl;
131 for (unsigned i = 0; i < Anchor_.size(); ++i)
132 lyxerr << " i: " << i << ' ' << Anchor_[i] << endl;
133 lyxerr << " sel: " << selection_ << endl;
136 void MathCursor::dump(char const *) const {}
140 bool MathCursor::isInside(MathInset const * p) const
142 for (unsigned i = 0; i < depth(); ++i)
143 if (Cursor_[i].inset_ == p)
149 bool MathCursor::openable(MathAtom const & t, bool sel) const
158 // we can't move into anything new during selection
159 if (depth() == Anchor_.size())
161 if (t.operator->() != Anchor_[depth()].inset_)
168 bool MathCursor::inNucleus() const
170 return inset()->asScriptInset() && idx() == 2;
174 bool MathCursor::posLeft()
183 bool MathCursor::posRight()
192 bool MathCursor::left(bool sel)
195 autocorrect_ = false;
196 targetx_ = -1; // "no target"
203 if (hasPrevAtom() && openable(prevAtom(), sel)) {
204 pushRight(prevAtom());
208 return posLeft() || idxLeft() || popLeft() || selection_;
212 bool MathCursor::right(bool sel)
215 autocorrect_ = false;
216 targetx_ = -1; // "no target"
223 if (hasNextAtom() && openable(nextAtom(), sel)) {
224 pushLeft(nextAtom());
228 return posRight() || idxRight() || popRight() || selection_;
232 void MathCursor::first()
235 push(formula_->par());
236 inset()->idxFirst(idx(), pos());
240 void MathCursor::last()
243 push(formula_->par());
244 inset()->idxLast(idx(), pos());
249 (MathIterator const & cursor, MathIterator const & anchor)
251 // avoid deeper nested insets when selecting
252 if (cursor.size() > anchor.size())
255 // anchor might be deeper, should have same path then
256 for (MathIterator::size_type i = 0; i < cursor.size(); ++i)
257 if (cursor[i].inset_ != anchor[i].inset_)
260 // position should be ok.
265 void MathCursor::setPos(int x, int y)
268 bool res = bruteFind(x, y,
269 formula()->xlow(), formula()->xhigh(),
270 formula()->ylow(), formula()->yhigh());
272 // this can happen on creation of "math-display"
276 targetx_ = -1; // "no target"
282 bool MathCursor::home(bool sel)
285 autocorrect_ = false;
288 if (!inset()->idxHome(idx(), pos()))
291 targetx_ = -1; // "no target"
296 bool MathCursor::end(bool sel)
299 autocorrect_ = false;
302 if (!inset()->idxEnd(idx(), pos()))
305 targetx_ = -1; // "no target"
310 void MathCursor::plainErase()
312 array().erase(pos());
316 void MathCursor::markInsert()
318 //lyxerr << "inserting mark" << endl;
319 array().insert(pos(), MathAtom(new MathCharInset(0)));
323 void MathCursor::markErase()
325 //lyxerr << "deleting mark" << endl;
326 array().erase(pos());
330 void MathCursor::plainInsert(MathAtom const & t)
333 array().insert(pos(), t);
338 void MathCursor::insert2(string const & str)
346 void MathCursor::insert(string const & str)
348 //lyxerr << "inserting '" << str << "'" << endl;
350 for (string::const_iterator it = str.begin(); it != str.end(); ++it)
351 plainInsert(MathAtom(new MathCharInset(*it)));
355 void MathCursor::insert(char c)
357 //lyxerr << "inserting '" << c << "'" << endl;
359 plainInsert(MathAtom(new MathCharInset(c)));
363 void MathCursor::insert(MathAtom const & t)
371 void MathCursor::niceInsert(string const & t)
382 void MathCursor::niceInsert(MathAtom const & t)
385 string safe = grabAndEraseSelection();
387 // enter the new inset and move the contents of the selection if possible
390 pushLeft(nextAtom());
396 void MathCursor::insert(MathArray const & ar)
401 array().insert(pos(), ar);
406 void MathCursor::paste(string const & data)
408 dispatch(FuncRequest(LFUN_PASTE, data));
412 bool MathCursor::backspace()
414 autocorrect_ = false;
422 if (inset()->ncols() == 1 &&
423 inset()->nrows() == 1 &&
432 MathUnknownInset * p = activeMacro();
433 if (p->name().size() > 1) {
434 p->setName(p->name().substr(0, p->name().size() - 1));
445 bool MathCursor::erase()
447 autocorrect_ = false;
456 // delete empty cells if possible
458 if (inset()->idxDelete(idx()))
461 // old behaviour when in last position of cell
462 if (pos() == size()) {
463 if (inset()->ncols() == 1 && inset()->nrows() == 1 && depth() == 1 && size() == 0)
466 inset()->idxGlue(idx());
476 bool MathCursor::up(bool sel)
481 MathIterator save = Cursor_;
485 autocorrect_ = false;
490 bool MathCursor::down(bool sel)
495 MathIterator save = Cursor_;
499 autocorrect_ = false;
504 void MathCursor::macroModeClose()
508 MathUnknownInset * p = activeMacro();
510 string s = p->name();
512 array().erase(pos());
514 // do nothing if the macro name is empty
518 string const name = s.substr(1);
520 // prevent entering of recursive macros
521 if (formula()->lyxCode() == InsetOld::MATHMACRO_CODE
522 && formula()->getInsetName() == name)
523 lyxerr << "can't enter recursive macro" << endl;
525 niceInsert(createMathInset(name));
529 string MathCursor::macroName() const
531 return inMacroMode() ? activeMacro()->name() : string();
535 void MathCursor::selClear()
542 void MathCursor::selCopy()
546 theCutBuffer.push(grabSelection());
549 //theCutBuffer.erase();
554 void MathCursor::selCut()
557 theCutBuffer.push(grabAndEraseSelection());
561 void MathCursor::selDel()
571 void MathCursor::selPaste(size_t n)
575 if (n < theCutBuffer.size())
576 paste(theCutBuffer[n]);
582 void MathCursor::selHandle(bool sel)
584 if (sel == selection_)
592 void MathCursor::selStart()
602 void MathCursor::selClearOrDel()
604 if (lyxrc.auto_region_delete)
611 void MathCursor::drawSelection(PainterInfo & pi) const
617 getSelection(i1, i2);
618 i1.inset_->drawSelection(pi, i1.idx_, i1.pos_, i2.idx_, i2.pos_);
622 void MathCursor::handleNest(MathAtom const & a)
625 asArray(grabAndEraseSelection(), at.nucleus()->cell(0));
627 pushRight(prevAtom());
631 void MathCursor::getPos(int & x, int & y) const
633 inset()->getPos(idx(), pos(), x, y);
637 int MathCursor::targetX() const
647 MathInset * MathCursor::inset() const
649 return cursor().inset_;
653 InsetFormulaBase * MathCursor::formula() const
659 MathCursor::idx_type MathCursor::idx() const
661 return cursor().idx_;
665 MathCursor::idx_type & MathCursor::idx()
667 return cursor().idx_;
671 MathCursor::pos_type MathCursor::pos() const
673 return cursor().pos_;
677 void MathCursor::adjust(pos_type from, difference_type diff)
679 if (cursor().pos_ > from)
680 cursor().pos_ += diff;
681 if (Anchor_.back().pos_ > from)
682 Anchor_.back().pos_ += diff;
683 // just to be on the safe side
684 // theoretically unecessary
689 MathCursor::pos_type & MathCursor::pos()
691 return cursor().pos_;
695 bool MathCursor::inMacroMode() const
699 MathUnknownInset const * p = prevAtom()->asUnknownInset();
700 return p && !p->final();
704 MathUnknownInset * MathCursor::activeMacro()
706 return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
710 MathUnknownInset const * MathCursor::activeMacro() const
712 return inMacroMode() ? prevAtom()->asUnknownInset() : 0;
716 bool MathCursor::inMacroArgMode() const
718 return pos() > 0 && prevAtom()->getChar() == '#';
722 bool MathCursor::selection() const
728 MathGridInset * MathCursor::enclosingGrid(MathCursor::idx_type & idx) const
730 for (MathInset::difference_type i = depth() - 1; i >= 0; --i) {
731 MathGridInset * p = Cursor_[i].inset_->asGridInset();
733 idx = Cursor_[i].idx_;
741 void MathCursor::popToHere(MathInset const * p)
743 while (depth() && Cursor_.back().inset_ != p)
748 void MathCursor::popToEnclosingGrid()
750 while (depth() && !Cursor_.back().inset_->asGridInset())
755 void MathCursor::popToEnclosingHull()
757 while (depth() && !Cursor_.back().inset_->asHullInset())
762 void MathCursor::pullArg()
765 MathArray a = array();
768 array().insert(pos(), a);
771 formula()->mutateToText();
776 void MathCursor::touch()
778 MathIterator::const_iterator it = Cursor_.begin();
779 MathIterator::const_iterator et = Cursor_.end();
780 for ( ; it != et; ++it)
785 void MathCursor::normalize()
787 if (idx() >= inset()->nargs()) {
788 lyxerr << "this should not really happen - 1: "
789 << idx() << ' ' << inset()->nargs()
790 << " in: " << inset() << endl;
793 idx() = min(idx(), inset()->nargs() - 1);
795 if (pos() > size()) {
796 lyxerr << "this should not really happen - 2: "
797 << pos() << ' ' << size() << " in idx: " << idx()
799 WriteStream wi(lyxerr, false, true);
804 pos() = min(pos(), size());
808 MathCursor::size_type MathCursor::size() const
810 return array().size();
814 bool MathCursor::hasPrevAtom() const
820 bool MathCursor::hasNextAtom() const
822 return pos() < size();
826 MathAtom const & MathCursor::prevAtom() const
829 return array()[pos() - 1];
833 MathAtom & MathCursor::prevAtom()
836 return array()[pos() - 1];
840 MathAtom const & MathCursor::nextAtom() const
842 Assert(pos() < size());
843 return array()[pos()];
847 MathAtom & MathCursor::nextAtom()
849 Assert(pos() < size());
850 return array()[pos()];
854 MathArray & MathCursor::array() const
856 static MathArray dummy;
858 if (idx() >= inset()->nargs()) {
859 lyxerr << "############ idx_ " << idx() << " not valid" << endl;
864 lyxerr << "############ depth() == 0 not valid" << endl;
868 return cursor().cell();
872 void MathCursor::idxNext()
874 inset()->idxNext(idx(), pos());
878 void MathCursor::idxPrev()
880 inset()->idxPrev(idx(), pos());
884 char MathCursor::valign() const
887 MathGridInset * p = enclosingGrid(idx);
888 return p ? p->valign() : '\0';
892 char MathCursor::halign() const
895 MathGridInset * p = enclosingGrid(idx);
896 return p ? p->halign(idx % p->ncols()) : '\0';
900 void MathCursor::getSelection(CursorPos & i1, CursorPos & i2) const
902 CursorPos anc = normalAnchor();
903 if (anc < cursor()) {
913 CursorPos & MathCursor::cursor()
916 return Cursor_.back();
920 CursorPos const & MathCursor::cursor() const
923 return Cursor_.back();
927 bool MathCursor::goUpDown(bool up)
929 // Be warned: The 'logic' implemented in this function is highly fragile.
930 // A distance of one pixel or a '<' vs '<=' _really_ matters.
931 // So fiddle around with it only if you know what you are doing!
936 // check if we had something else in mind, if not, this is the future goal
942 // try neigbouring script insets
945 MathScriptInset const * p = prevAtom()->asScriptInset();
946 if (p && p->has(up)) {
949 idx() = up; // the superscript has index 1
951 ///lyxerr << "updown: handled by scriptinset to the left" << endl;
958 MathScriptInset const * p = nextAtom()->asScriptInset();
959 if (p && p->has(up)) {
963 ///lyxerr << "updown: handled by scriptinset to the right" << endl;
968 // try current cell for e.g. text insets
969 if (inset()->idxUpDown2(idx(), pos(), up, targetx_))
972 //xarray().boundingBox(xlow, xhigh, ylow, yhigh);
977 //if (bruteFind(xo, yo, xlow, xhigh, ylow, yhigh)) {
978 // lyxerr << "updown: handled by brute find in the same cell" << endl;
982 // try to find an inset that knows better then we
984 ///lyxerr << "updown: We are in " << *inset() << " idx: " << idx() << endl;
986 if (inset()->idxUpDown(idx(), pos(), up, targetx_)) {
987 // try to find best position within this inset
993 // no such inset found, just take something "above"
994 ///lyxerr << "updown: handled by strange case" << endl;
1000 up ? formula()->ylow() : yo + 4,
1001 up ? yo - 4 : formula()->yhigh()
1004 // any improvement so far?
1007 if (up ? ynew < yo : ynew > yo)
1013 bool MathCursor::bruteFind
1014 (int x, int y, int xlow, int xhigh, int ylow, int yhigh)
1016 MathIterator best_cursor;
1017 double best_dist = 1e10;
1019 MathIterator it = ibegin(formula()->par().nucleus());
1020 MathIterator et = iend(formula()->par().nucleus());
1022 // avoid invalid nesting when selecting
1023 if (!selection_ || positionable(it, Anchor_)) {
1025 it.back().getPos(xo, yo);
1026 if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
1027 double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
1028 //lyxerr << "x: " << x << " y: " << y << " d: " << endl;
1029 // '<=' in order to take the last possible position
1030 // this is important for clicking behind \sum in e.g. '\sum_i a'
1031 if (d <= best_dist) {
1043 if (best_dist < 1e10)
1044 Cursor_ = best_cursor;
1045 return best_dist < 1e10;
1049 void MathCursor::bruteFind2(int x, int y)
1051 double best_dist = 1e10;
1053 MathIterator it = Cursor_;
1054 it.back().setPos(0);
1055 MathIterator et = Cursor_;
1056 et.back().setPos(it.cell().size());
1057 for (int i = 0; ; ++i) {
1059 it.back().getPos(xo, yo);
1060 double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
1061 // '<=' in order to take the last possible position
1062 // this is important for clicking behind \sum in e.g. '\sum_i a'
1063 lyxerr << "i: " << i << " d: " << d << " best: " << best_dist << endl;
1064 if (d <= best_dist) {
1075 bool MathCursor::idxLineLast()
1077 idx() -= idx() % inset()->ncols();
1078 idx() += inset()->ncols() - 1;
1083 bool MathCursor::idxLeft()
1085 return inset()->idxLeft(idx(), pos());
1089 bool MathCursor::idxRight()
1091 return inset()->idxRight(idx(), pos());
1095 bool MathCursor::script(bool up)
1097 // Hack to get \\^ and \\_ working
1098 if (inMacroMode() && macroName() == "\\") {
1100 niceInsert(createMathInset("mathcircumflex"));
1107 string safe = grabAndEraseSelection();
1109 // we are in a nucleus of a script inset, move to _our_ script
1110 inset()->asScriptInset()->ensure(up);
1113 } else if (hasPrevAtom() && prevAtom()->asScriptInset()) {
1114 prevAtom().nucleus()->asScriptInset()->ensure(up);
1115 pushRight(prevAtom());
1118 } else if (hasPrevAtom()) {
1120 array()[pos()] = MathAtom(new MathScriptInset(nextAtom(), up));
1121 pushLeft(nextAtom());
1125 plainInsert(MathAtom(new MathScriptInset(up)));
1126 prevAtom().nucleus()->asScriptInset()->ensure(up);
1127 pushRight(prevAtom());
1137 bool MathCursor::interpret(char c)
1139 //lyxerr << "interpret 2: '" << c << "'" << endl;
1140 targetx_ = -1; // "no target"
1141 if (inMacroArgMode()) {
1145 MathMacroTemplate const * p = formula()->par()->asMacroTemplate();
1146 if (p && 1 <= n && n <= p->numargs())
1147 insert(MathAtom(new MathMacroArgument(c - '0')));
1149 insert(createMathInset("#"));
1150 interpret(c); // try again
1156 if (inMacroMode()) {
1157 string name = macroName();
1158 //lyxerr << "interpret name: '" << name << "'" << endl;
1161 activeMacro()->setName(activeMacro()->name() + c);
1165 // handle 'special char' macros
1170 if (currentMode() == MathInset::TEXT_MODE)
1171 niceInsert(createMathInset("textbackslash"));
1173 niceInsert(createMathInset("backslash"));
1174 } else if (c == '{') {
1175 niceInsert(MathAtom(new MathBraceInset));
1177 niceInsert(createMathInset(string(1, c)));
1182 // leave macro mode and try again if necessary
1185 niceInsert(MathAtom(new MathBraceInset));
1191 // This is annoying as one has to press <space> far too often.
1195 // leave autocorrect mode if necessary
1196 if (autocorrect_ && c == ' ') {
1197 autocorrect_ = false;
1202 // just clear selection on pressing the space bar
1203 if (selection_ && c == ' ') {
1211 //lyxerr << "starting with macro" << endl;
1212 insert(MathAtom(new MathUnknownInset("\\", false)));
1217 if (currentMode() == MathInset::TEXT_MODE)
1223 if (currentMode() == MathInset::TEXT_MODE) {
1224 // insert spaces in text mode,
1225 // but suppress direct insertion of two spaces in a row
1226 // the still allows typing '<space>a<space>' and deleting the 'a', but
1227 // it is better than nothing...
1228 if (!hasPrevAtom() || prevAtom()->getChar() != ' ')
1232 if (hasPrevAtom() && prevAtom()->asSpaceInset()) {
1233 prevAtom().nucleus()->asSpaceInset()->incSpace();
1238 // if are at the very end, leave the formula
1239 return pos() != size();
1242 if (c == '{' || c == '}' || c == '#' || c == '&' || c == '$') {
1243 createMathInset(string(1, c));
1248 niceInsert(MathAtom(new MathCommentInset));
1252 // try auto-correction
1253 //if (autocorrect_ && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1256 // no special circumstances, so insert the character without any fuss
1258 autocorrect_ = true;
1263 void MathCursor::setSelection(MathIterator const & where, size_type n)
1272 void MathCursor::insetToggle()
1274 if (hasNextAtom()) {
1275 // toggle previous inset ...
1276 nextAtom().nucleus()->lock(!nextAtom()->lock());
1277 } else if (popLeft() && hasNextAtom()) {
1278 // ... or enclosing inset if we are in the last inset position
1279 nextAtom().nucleus()->lock(!nextAtom()->lock());
1285 string MathCursor::info() const
1288 os << "Math editor mode. ";
1289 for (int i = 0, n = depth(); i < n; ++i) {
1290 Cursor_[i].inset_->infoize(os);
1294 prevAtom()->infoize2(os);
1296 return STRCONV(os.str());
1300 unsigned MathCursor::depth() const
1302 return Cursor_.size();
1310 void region(CursorPos const & i1, CursorPos const & i2,
1311 MathInset::row_type & r1, MathInset::row_type & r2,
1312 MathInset::col_type & c1, MathInset::col_type & c2)
1314 MathInset * p = i1.inset_;
1315 c1 = p->col(i1.idx_);
1316 c2 = p->col(i2.idx_);
1319 r1 = p->row(i1.idx_);
1320 r2 = p->row(i2.idx_);
1328 string MathCursor::grabSelection() const
1335 getSelection(i1, i2);
1337 if (i1.idx_ == i2.idx_) {
1338 MathArray::const_iterator it = i1.cell().begin();
1339 return asString(MathArray(it + i1.pos_, it + i2.pos_));
1344 region(i1, i2, r1, r2, c1, c2);
1347 for (row_type row = r1; row <= r2; ++row) {
1350 for (col_type col = c1; col <= c2; ++col) {
1353 data += asString(i1.inset_->cell(i1.inset_->index(row, col)));
1360 void MathCursor::eraseSelection()
1364 getSelection(i1, i2);
1365 if (i1.idx_ == i2.idx_)
1366 i1.cell().erase(i1.pos_, i2.pos_);
1368 MathInset * p = i1.inset_;
1371 region(i1, i2, r1, r2, c1, c2);
1372 for (row_type row = r1; row <= r2; ++row)
1373 for (col_type col = c1; col <= c2; ++col)
1374 p->cell(p->index(row, col)).clear();
1380 string MathCursor::grabAndEraseSelection()
1384 string res = grabSelection();
1391 CursorPos MathCursor::normalAnchor() const
1393 if (Anchor_.size() < depth()) {
1395 lyxerr << "unusual Anchor size" << endl;
1397 //lyx::Assert(Anchor_.size() >= cursor.depth());
1398 // use Anchor on the same level as Cursor
1399 CursorPos normal = Anchor_[depth() - 1];
1400 if (depth() < Anchor_.size() && !(normal < cursor())) {
1401 // anchor is behind cursor -> move anchor behind the inset
1408 dispatch_result MathCursor::dispatch(FuncRequest const & cmd)
1410 // mouse clicks are somewhat special
1412 switch (cmd.action) {
1413 case LFUN_MOUSE_PRESS:
1414 case LFUN_MOUSE_MOTION:
1415 case LFUN_MOUSE_RELEASE:
1416 case LFUN_MOUSE_DOUBLE: {
1417 CursorPos & pos = Cursor_.back();
1418 dispatch_result res = UNDISPATCHED;
1421 if (x < cmd.x && hasPrevAtom()) {
1422 res = prevAtom().nucleus()->dispatch(cmd, pos.idx_, pos.pos_);
1423 if (res != UNDISPATCHED)
1426 if (x > cmd.x && hasNextAtom()) {
1427 res = nextAtom().nucleus()->dispatch(cmd, pos.idx_, pos.pos_);
1428 if (res != UNDISPATCHED)
1436 for (int i = Cursor_.size() - 1; i >= 0; --i) {
1437 CursorPos & pos = Cursor_[i];
1438 dispatch_result res = pos.inset_->dispatch(cmd, pos.idx_, pos.pos_);
1439 if (res != UNDISPATCHED) {
1440 if (res == DISPATCHED_POP) {
1441 Cursor_.shrink(i + 1);
1447 return UNDISPATCHED;
1451 MathInset::mode_type MathCursor::currentMode() const
1453 for (int i = Cursor_.size() - 1; i >= 0; --i) {
1454 MathInset::mode_type res = Cursor_[i].inset_->currentMode();
1455 if (res != MathInset::UNDECIDED_MODE)
1458 return MathInset::UNDECIDED_MODE;
1462 void MathCursor::handleFont(string const & font)
1467 safe = grabAndEraseSelection();
1470 if (array().size()) {
1471 // something left in the cell
1473 // cursor in first position
1475 } else if (pos() == array().size()) {
1476 // cursor in last position
1479 // cursor in between. split cell
1480 MathArray::iterator bt = array().begin();
1481 MathAtom at = createMathInset(font);
1482 at.nucleus()->cell(0) = MathArray(bt, bt + pos());
1483 cursor().cell().erase(bt, bt + pos());
1488 // nothing left in the cell
1496 void releaseMathCursor(BufferView * bv)
1499 InsetFormulaBase * f = mathcursor->formula();