3 * Purpose: Interaction for mathed
4 * Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
5 * Created: January 1996
6 * Description: Math interaction for a WYSIWYG math editor.
8 * Dependencies: Xlib, XForms
10 * Copyright: 1996, Alejandro Aguilar Sierra
12 * Version: 0.8beta, Math & Lyx project.
14 * You are free to use and modify this code under the terms of
15 * the GNU General Public Licence version 2 or later.
21 #pragma implementation
24 #include "support/lstrings.h"
25 #include "support/LAssert.h"
29 #include "math_cursor.h"
30 #include "formulabase.h"
31 #include "math_arrayinset.h"
32 #include "math_braceinset.h"
33 #include "math_boxinset.h"
34 #include "math_casesinset.h"
35 #include "math_charinset.h"
36 #include "math_deliminset.h"
37 #include "math_factory.h"
38 #include "math_hullinset.h"
39 #include "math_iterator.h"
40 #include "math_macroarg.h"
41 #include "math_mathmlstream.h"
42 #include "math_parser.h"
43 #include "math_replace.h"
44 #include "math_scriptinset.h"
45 #include "math_spaceinset.h"
46 #include "math_specialcharinset.h"
47 #include "math_support.h"
60 using std::ostringstream;
66 typedef MathInset::col_type col_type;
67 typedef MathInset::row_type row_type;
68 typedef MathInset::idx_type idx_type;
74 void region(MathCursorPos const & i1, MathCursorPos const & i2,
75 row_type & r1, row_type & r2, col_type & c1, col_type & c2)
77 MathInset * p = i1.par_;
88 void grab(MathCursor const & cursor)
92 cursor.getSelection(i1, i2);
93 // shouldn'tt we assert on i1.par_ == i2.par_?
94 if (i1.idx_ == i2.idx_) {
95 data_ = MathGridInset(1, 1);
96 data_.cell(0) = MathArray(i1.cell(), i1.pos_, i2.pos_);
100 region(i1, i2, r1, r2, c1, c2);
101 data_ = MathGridInset(c2 - c1 + 1, r2 - r1 + 1);
102 for (row_type row = 0; row < data_.nrows(); ++row)
103 for (col_type col = 0; col < data_.ncols(); ++col) {
104 idx_type i = i1.par_->index(row + r1, col + c1);
105 data_.cell(data_.index(row, col)) = i1.par_->cell(i);
110 void erase(MathCursor & cursor)
114 cursor.getSelection(i1, i2);
115 if (i1.idx_ == i2.idx_)
116 i1.cell().erase(i1.pos_, i2.pos_);
118 MathInset * p = i1.par_;
121 region(i1, i2, r1, r2, c1, c2);
122 for (row_type row = r1; row <= r2; ++row)
123 for (col_type col = c1; col <= c2; ++col)
124 p->cell(p->index(row, col)).erase();
126 cursor.cursor() = i1;
129 void paste(MathCursor & cursor) const
131 if (data_.nargs() == 1) {
132 // single cell/part of cell
133 cursor.insert(data_.cell(0));
137 MathGridInset * p = cursor.enclosingGrid(idx);
138 col_type const numcols = min(data_.ncols(), p->ncols() - p->col(idx));
139 row_type const numrows = min(data_.nrows(), p->nrows() - p->row(idx));
140 for (row_type row = 0; row < numrows; ++row)
141 for (col_type col = 0; col < numcols; ++col) {
142 idx_type i = p->index(row + p->row(idx), col + p->col(idx));
143 p->cell(i).push_back(data_.cell(data_.index(row, col)));
148 // glues selection to one cell
149 MathArray glue() const
152 for (unsigned i = 0; i < data_.nargs(); ++i)
153 ar.push_back(data_.cell(i));
159 data_ = MathGridInset(1, 1);
166 Selection theSelection;
173 MathCursor::MathCursor(InsetFormulaBase * formula, bool left)
174 : formula_(formula), lastcode_(LM_TC_MIN), selection_(false)
176 left ? first() : last();
180 void MathCursor::push(MathAtom & t)
182 Cursor_.push_back(MathCursorPos(t.nucleus()));
186 void MathCursor::pushLeft(MathAtom & t)
188 //cerr << "Entering atom "; t->write(cerr, false); cerr << " left\n";
190 t->idxFirst(idx(), pos());
194 void MathCursor::pushRight(MathAtom & t)
196 //cerr << "Entering atom "; t->write(cerr, false); cerr << " right\n";
199 t->idxLast(idx(), pos());
203 bool MathCursor::popLeft()
205 //cerr << "Leaving atom "; par()->write(cerr, false); cerr << " left\n";
206 if (Cursor_.size() <= 1)
208 if (par()->asScriptInset()) {
209 par()->asScriptInset()->removeEmptyScripts();
210 if (par()->asScriptInset()->empty())
218 bool MathCursor::popRight()
220 //cerr << "Leaving atom "; par()->write(cerr, false); cerr << " right\n";
221 if (Cursor_.size() <= 1)
223 if (par()->asScriptInset()) {
224 par()->asScriptInset()->removeEmptyScripts();
225 if (par()->asScriptInset()->empty())
236 void MathCursor::dump(char const * what) const
238 lyxerr << "MC: " << what << "\n";
239 lyxerr << " Cursor: " << Cursor_.size() << "\n";
240 for (unsigned i = 0; i < Cursor_.size(); ++i)
241 lyxerr << " i: " << i << " " << Cursor_[i] << "\n";
242 lyxerr << " Anchor: " << Anchor_.size() << "\n";
243 for (unsigned i = 0; i < Anchor_.size(); ++i)
244 lyxerr << " i: " << i << " " << Anchor_[i] << "\n";
245 lyxerr << " sel: " << selection_ << "\n";
248 void MathCursor::dump(char const *) const {}
252 UpdatableInset * MathCursor::asHyperActiveInset() const
254 return par()->asHyperActiveInset();
258 bool MathCursor::isInside(MathInset const * p) const
260 for (unsigned i = 0; i < Cursor_.size(); ++i)
261 if (Cursor_[i].par_ == p)
267 bool MathCursor::openable(MathAtom const & t, bool sel) const
269 if (t->isHyperActive())
275 if (t->asScriptInset())
279 // we can't move into anything new during selection
280 if (Cursor_.size() == Anchor_.size())
282 if (t.nucleus() != Anchor_[Cursor_.size()].par_)
289 bool MathCursor::posLeft()
298 bool MathCursor::posRight()
307 bool MathCursor::left(bool sel)
312 lastcode_ = LM_TC_MIN;
316 lastcode_ = LM_TC_MIN;
318 if (hasPrevAtom() && openable(prevAtom(), sel)) {
319 if (prevAtom()->isHyperActive()) {
320 lyxerr << "entering hyperactive inset\n";
322 pushRight(prevAtom());
326 return posLeft() || idxLeft() || popLeft() || selection_;
330 bool MathCursor::right(bool sel)
335 lastcode_ = LM_TC_MIN;
339 lastcode_ = LM_TC_MIN;
341 if (hasNextAtom() && openable(nextAtom(), sel)) {
342 if (nextAtom()->isHyperActive()) {
343 lyxerr << "entering hyperactive inset\n";
346 nextAtom()->edit(formula()->view(), x, y, 0);
348 pushLeft(nextAtom());
352 return posRight() || idxRight() || popRight() || selection_;
356 void MathCursor::first()
359 pushLeft(formula_->par());
363 void MathCursor::last()
370 bool positionable(MathCursor::cursor_type const & cursor,
371 MathCursor::cursor_type const & anchor)
373 // avoid deeper nested insets when selecting
374 if (cursor.size() > anchor.size())
377 // anchor might be deeper, should have same path then
378 for (MathCursor::cursor_type::size_type i = 0; i < cursor.size(); ++i)
379 if (cursor[i].par_ != anchor[i].par_)
382 // position should be ok.
387 void MathCursor::setPos(int x, int y)
390 bool res = bruteFind(x, y,
391 formula()->xlow(), formula()->xhigh(),
392 formula()->ylow(), formula()->yhigh());
394 // this ccan happen on creation of "math-display"
403 void MathCursor::home(bool sel)
408 lastcode_ = LM_TC_MIN;
409 if (!par()->idxHome(idx(), pos()))
415 void MathCursor::end(bool sel)
420 lastcode_ = LM_TC_MIN;
421 if (!par()->idxEnd(idx(), pos()))
427 void MathCursor::plainErase()
429 array().erase(pos());
433 void MathCursor::markInsert()
435 //lyxerr << "inserting mark\n";
436 array().insert(pos(), MathAtom(new MathCharInset(0, lastcode_)));
440 void MathCursor::markErase()
442 //lyxerr << "deleting mark\n";
443 array().erase(pos());
447 void MathCursor::plainInsert(MathAtom const & t)
449 array().insert(pos(), t);
454 void MathCursor::insert(char c, MathTextCodes t)
456 //lyxerr << "inserting '" << c << "'\n";
457 plainInsert(MathAtom(new MathCharInset(c, t)));
461 void MathCursor::insert(char c)
463 insert(c, lastcode_);
467 void MathCursor::insert(MathAtom const & t)
482 void MathCursor::niceInsert(MathAtom const & t)
485 insert(t); // inserting invalidates the pointer!
486 MathAtom const & p = prevAtom();
489 right(); // do not push for e.g. MathSymbolInset
495 void MathCursor::insert(MathArray const & ar)
501 array().insert(pos(), ar);
506 void MathCursor::paste(MathArray const & ar)
510 array().insert(pos(), ar);
515 void MathCursor::backspace()
527 MathScriptInset * p = prevAtom()->asScriptInset();
529 p->removeScript(p->hasUp());
530 // Don't delete if there is anything left
531 if (p->hasUp() || p->hasDown())
540 void MathCursor::erase()
550 // delete empty cells if necessary
551 if (array().empty()) {
554 par()->idxDelete(idx(), popit, removeit);
555 if (popit && popLeft() && removeit)
563 MathScriptInset * p = nextAtom()->asScriptInset();
565 p->removeScript(p->hasUp());
566 // Don't delete if there is anything left
567 if (p->hasUp() || p->hasDown())
575 void MathCursor::delLine()
584 if (par()->nrows() > 1) {
585 // grid are the only things with more than one row...
586 lyx::Assert(par()->asGridInset());
587 par()->asGridInset()->delRow(hullRow());
590 if (idx() >= par()->nargs())
591 idx() = par()->nargs() - 1;
598 bool MathCursor::up(bool sel)
603 cursor_type save = Cursor_;
611 bool MathCursor::down(bool sel)
616 cursor_type save = Cursor_;
624 bool MathCursor::toggleLimits()
628 MathScriptInset * t = nextAtom()->asScriptInset();
631 int old = t->limits();
632 t->limits(old < 0 ? 1 : -1);
633 return old != t->limits();
637 void MathCursor::macroModeClose()
639 string s = macroName();
641 size_type old = pos();
643 array().erase(pos(), old);
649 MathInset::difference_type MathCursor::macroNamePos() const
651 for (MathInset::difference_type i = pos() - 1; i >= 0; --i) {
652 MathAtom & p = array().at(i);
653 if (p->code() == LM_TC_TEX && p->getChar() == '\\')
660 string MathCursor::macroName() const
663 MathInset::difference_type i = macroNamePos();
664 for (; i >= 0 && i < int(pos()); ++i)
665 s += array().at(i)->getChar();
670 void MathCursor::selCopy()
674 theSelection.grab(*this);
680 void MathCursor::selCut()
684 theSelection.grab(*this);
685 theSelection.erase(*this);
688 theSelection.clear();
693 void MathCursor::selDel()
697 theSelection.erase(*this);
705 void MathCursor::selPaste()
708 theSelection.paste(*this);
709 //theSelection.grab(*this);
714 void MathCursor::selHandle(bool sel)
716 if (sel == selection_)
718 //theSelection.clear();
724 void MathCursor::selStart()
727 //theSelection.clear();
734 void MathCursor::selClear()
742 void MathCursor::selGet(MathArray & ar)
748 theSelection.grab(*this);
749 ar = theSelection.glue();
754 void MathCursor::drawSelection(Painter & pain) const
761 getSelection(i1, i2);
763 if (i1.idx_ == i2.idx_) {
764 MathXArray & c = i1.xcell();
765 int x1 = c.xo() + c.pos2x(i1.pos_);
766 int y1 = c.yo() - c.ascent();
767 int x2 = c.xo() + c.pos2x(i2.pos_);
768 int y2 = c.yo() + c.descent();
769 pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
771 vector<MathInset::idx_type> indices
772 = i1.par_->idxBetween(i1.idx_, i2.idx_);
773 for (unsigned i = 0; i < indices.size(); ++i) {
774 MathXArray & c = i1.xcell(indices[i]);
776 int y1 = c.yo() - c.ascent();
777 int x2 = c.xo() + c.width();
778 int y2 = c.yo() + c.descent();
779 pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
784 // draw anchor if different from selection boundary
785 MathCursorPos anc = Anchor_.back();
786 if (anc != i1 && anc != i2) {
787 MathXArray & c = anc.xcell();
788 int x = c.xo() + c.pos2x(anc.pos_);
789 int y1 = c.yo() - c.ascent();
790 int y2 = c.yo() + c.descent();
791 pain.line(x, y1, x, y2, LColor::math);
797 void MathCursor::handleFont(MathTextCodes t)
803 getSelection(i1, i2);
804 if (i1.idx_ == i2.idx_) {
805 MathArray & ar = i1.cell();
806 for (MathInset::pos_type pos = i1.pos_; pos != i2.pos_; ++pos)
807 ar.at(pos)->handleFont(t);
810 lastcode_ = (lastcode_ == t) ? LM_TC_VAR : t;
814 void MathCursor::handleDelim(string const & l, string const & r)
816 handleNest(new MathDelimInset(l, r));
820 void MathCursor::handleNest(MathInset * p)
824 p->cell(0) = theSelection.glue();
826 insert(MathAtom(p)); // this invalidates p!
827 pushRight(prevAtom());
831 void MathCursor::getPos(int & x, int & y)
834 #warning This should probably take cellXOffset and cellYOffset into account
836 x = xarray().xo() + xarray().pos2x(pos());
841 MathInset * MathCursor::par() const
843 return cursor().par_;
847 InsetFormulaBase * MathCursor::formula()
853 MathCursor::idx_type MathCursor::idx() const
855 return cursor().idx_;
859 MathCursor::idx_type & MathCursor::idx()
861 return cursor().idx_;
865 MathCursor::pos_type MathCursor::pos() const
867 return cursor().pos_;
871 MathCursor::pos_type & MathCursor::pos()
873 return cursor().pos_;
877 bool MathCursor::inMacroMode() const
879 return macroNamePos() != -1;
883 bool MathCursor::inMacroArgMode() const
885 return pos() > 0 && prevAtom()->getChar() == '#';
889 bool MathCursor::selection() const
895 MathGridInset * MathCursor::enclosingGrid(MathCursor::idx_type & idx) const
897 for (MathInset::difference_type i = Cursor_.size() - 1; i >= 0; --i) {
898 MathGridInset * p = Cursor_[i].par_->asGridInset();
900 idx = Cursor_[i].idx_;
908 void MathCursor::pullArg(bool goright)
911 MathArray a = array();
913 MathScriptInset const * p = par()->asScriptInset();
915 // special handling for scripts
916 const bool up = p->hasUp();
918 MathScriptInset * q = nextAtom()->asScriptInset();
922 array().insert(pos(), a);
928 array().insert(pos(), a);
932 formula()->mutateToText();
937 void MathCursor::normalize()
941 MathIterator it = ibegin(formula()->par().nucleus());
942 MathIterator et = iend(formula()->par().nucleus());
943 for (; it != et; ++it)
944 if (it.par()->asBoxInset())
945 it.par()->asBoxInset()->rebreak();
948 if (idx() >= par()->nargs()) {
949 lyxerr << "this should not really happen - 1: "
950 << idx() << " " << par()->nargs() << "\n";
953 idx() = min(idx(), par()->nargs() - 1);
955 if (pos() > size()) {
956 lyxerr << "this should not really happen - 2: "
957 << pos() << " " << size() << " in idx: " << idx()
959 WriteStream wi(lyxerr, false);
964 pos() = min(pos(), size());
968 MathCursor::size_type MathCursor::size() const
970 return array().size();
974 MathCursor::col_type MathCursor::hullCol() const
976 return Cursor_[0].par_->asGridInset()->col(Cursor_[0].idx_);
980 MathCursor::row_type MathCursor::hullRow() const
982 return Cursor_[0].par_->asGridInset()->row(Cursor_[0].idx_);
986 bool MathCursor::hasPrevAtom() const
992 bool MathCursor::hasNextAtom() const
994 return pos() < size();
998 MathAtom const & MathCursor::prevAtom() const
1000 lyx::Assert(pos() > 0);
1001 return array().at(pos() - 1);
1005 MathAtom & MathCursor::prevAtom()
1007 lyx::Assert(pos() > 0);
1008 return array().at(pos() - 1);
1012 MathAtom const & MathCursor::nextAtom() const
1014 lyx::Assert(pos() < size());
1015 return array().at(pos());
1019 MathAtom & MathCursor::nextAtom()
1021 lyx::Assert(pos() < size());
1022 return array().at(pos());
1026 MathArray & MathCursor::array() const
1028 static MathArray dummy;
1030 if (idx() >= par()->nargs()) {
1031 lyxerr << "############ idx_ " << idx() << " not valid\n";
1035 if (Cursor_.size() == 0) {
1036 lyxerr << "############ Cursor_.size() == 0 not valid\n";
1040 return cursor().cell();
1044 MathXArray & MathCursor::xarray() const
1046 static MathXArray dummy;
1048 if (Cursor_.size() == 0) {
1049 lyxerr << "############ Cursor_.size() == 0 not valid\n";
1053 return cursor().xcell();
1057 void MathCursor::idxNext()
1059 par()->idxNext(idx(), pos());
1063 void MathCursor::idxPrev()
1065 par()->idxPrev(idx(), pos());
1069 void MathCursor::splitCell()
1071 if (idx() + 1 == par()->nargs())
1073 MathArray ar = array();
1075 array().erase(pos(), size());
1078 array().insert(0, ar);
1082 void MathCursor::breakLine()
1084 // leave inner cells
1088 MathHullInset * p = formula()->par()->asHullInset();
1092 if (p->getType() == LM_OT_SIMPLE || p->getType() == LM_OT_EQUATION) {
1093 p->mutate(LM_OT_EQNARRAY);
1097 p->addRow(hullRow());
1100 const row_type r = hullRow();
1101 for (col_type c = hullCol() + 1; c < p->ncols(); ++c)
1102 p->cell(p->index(r, c)).swap(p->cell(p->index(r + 1, c)));
1106 p->cell(idx()).swap(p->cell(idx() + p->ncols() - 1));
1111 //void MathCursor::readLine(MathArray & ar) const
1113 // idx_type base = row() * par()->ncols();
1114 // for (idx_type off = 0; off < par()->ncols(); ++off)
1115 // ar.push_back(par()->cell(base + off));
1119 char MathCursor::valign() const
1122 MathGridInset * p = enclosingGrid(idx);
1123 return p ? p->valign() : '\0';
1127 char MathCursor::halign() const
1130 MathGridInset * p = enclosingGrid(idx);
1131 return p ? p->halign(idx % p->ncols()) : '\0';
1135 void MathCursor::getSelection(MathCursorPos & i1, MathCursorPos & i2) const
1137 MathCursorPos anc = normalAnchor();
1138 if (anc < cursor()) {
1148 MathCursorPos & MathCursor::cursor()
1150 lyx::Assert(Cursor_.size());
1151 return Cursor_.back();
1155 MathCursorPos const & MathCursor::cursor() const
1157 lyx::Assert(Cursor_.size());
1158 return Cursor_.back();
1162 bool MathCursor::goUpDown(bool up)
1164 int xlow, xhigh, ylow, yhigh;
1169 // try current cell first
1170 xarray().boundingBox(xlow, xhigh, ylow, yhigh);
1175 if (bruteFind(xo, yo, xlow, xhigh, ylow, yhigh))
1178 // try to find an inset that knows better then we
1180 // we found a cell that think something "below" us.
1182 if (par()->idxUp(idx()))
1185 if (par()->idxDown(idx()))
1190 // no such inset found, just take something "above"
1195 up ? formula()->ylow() : yo + 4,
1196 up ? yo - 4 : formula()->yhigh()
1200 xarray().boundingBox(xlow, xhigh, ylow, yhigh);
1201 bruteFind(xo, yo, xlow, xhigh, ylow, yhigh);
1206 bool MathCursor::bruteFind(int x, int y, int xlow, int xhigh, int ylow, int yhigh)
1208 cursor_type best_cursor;
1209 double best_dist = 1e10;
1211 MathIterator it = ibegin(formula()->par().nucleus());
1212 MathIterator et = iend(formula()->par().nucleus());
1214 // avoid invalid nesting when selecting
1215 if (!selection_ || positionable(it.cursor(), Anchor_)) {
1216 int xo = it.position().xpos();
1217 int yo = it.position().ypos();
1218 if (xlow - 2 <= xo && xo <= xhigh + 2 &&
1219 ylow - 2 <= yo && yo <= yhigh + 2)
1221 double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
1222 if (d < best_dist) {
1224 best_cursor = it.cursor();
1234 if (best_dist < 1e10)
1235 Cursor_ = best_cursor;
1236 return best_dist < 1e10;
1240 bool MathCursor::idxLeft()
1242 return par()->idxLeft(idx(), pos());
1246 bool MathCursor::idxRight()
1248 return par()->idxRight(idx(), pos());
1252 bool MathCursor::interpret(string const & s)
1254 //lyxerr << "interpret 1: '" << s << "'\n";
1259 return interpret(s[0]);
1261 //lyxerr << "char: '" << s[0] << "' int: " << int(s[0]) << endl;
1262 //owner_->getIntl()->getTrans().TranslateAndInsert(s[0], lt);
1263 //lyxerr << "trans: '" << s[0] << "' int: " << int(s[0]) << endl;
1265 if (s.size() >= 5 && s.substr(0, 5) == "cases") {
1267 istringstream is(s.substr(5).c_str());
1270 niceInsert(MathAtom(new MathCasesInset(n)));
1274 if (s.size() >= 6 && s.substr(0, 6) == "matrix") {
1279 istringstream is(s.substr(6).c_str());
1280 is >> m >> n >> v_align >> h_align;
1284 niceInsert(MathAtom(new MathArrayInset("array", m, n, v_align[0], h_align)));
1288 if (s.size() >= 7 && s.substr(0, 7) == "replace") {
1290 istringstream is(s.substr(7).c_str());
1293 mathed_parse_cell(rep.from, from);
1294 mathed_parse_cell(rep.to, to);
1295 lyxerr << "replacing '" << from << "' with '" << to << "'\n";
1296 par()->replace(rep);
1300 if (s == "\\over" || s == "\\choose" || s == "\\atop") {
1301 MathArray ar = array();
1302 MathAtom t(createMathInset(s.substr(1)));
1303 t->asNestInset()->cell(0).swap(array());
1311 latexkeys const * l = in_word_set(s.substr(1));
1312 if (l && (l->token == LM_TK_FONT || l->token == LM_TK_OLDFONT)) {
1313 lastcode_ = static_cast<MathTextCodes>(l->id);
1317 // prevent entering of recursive macros
1318 if (formula()->lyxCode() == Inset::MATHMACRO_CODE
1319 && formula()->getInsetName() == s.substr(1))
1321 lyxerr << "can't enter recursive macro\n";
1325 niceInsert(createMathInset(s.substr(1)));
1330 bool MathCursor::script(bool up)
1334 if (hasPrevAtom() && prevAtom()->asScriptInset()) {
1335 prevAtom()->asScriptInset()->ensure(up);
1336 pushRight(prevAtom());
1339 } else if (hasNextAtom() && nextAtom()->asScriptInset()) {
1340 nextAtom()->asScriptInset()->ensure(up);
1341 pushLeft(nextAtom());
1345 plainInsert(MathAtom(new MathScriptInset(up)));
1346 prevAtom()->asScriptInset()->ensure(up);
1347 pushRight(prevAtom());
1357 bool MathCursor::interpret(char c)
1359 if (inMacroArgMode()) {
1362 if ('1' <= c && c <= '9')
1363 insert(MathAtom(new MathMacroArgument(c - '0')));
1365 insert(MathAtom(new MathSpecialCharInset('#')));
1366 interpret(c); // try again
1372 if (inMacroMode()) {
1373 string name = macroName();
1375 if (name == "\\" && c == '\\') {
1377 interpret("\\backslash");
1382 insert(c, LM_TC_TEX);
1387 insert(c, LM_TC_TEX);
1395 insert(c, LM_TC_TEX);
1397 insert(c, lastcode_);
1406 // fall through in the other cases
1409 if (lastcode_ == LM_TC_TEXTRM || par()->asBoxInset()) {
1410 // suppress direct insertion of two spaces in a row
1411 // the still allows typing '<space>a<space>' and deleting the 'a', but
1412 // it is better than nothing...
1413 if (c == ' ' && hasPrevAtom() && prevAtom()->getChar() == ' ')
1415 insert(c, LM_TC_TEXTRM);
1420 if (hasPrevAtom() && prevAtom()->asSpaceInset()) {
1421 prevAtom()->asSpaceInset()->incSpace();
1426 // if are at the very end, leave the formula
1427 return pos() != size();
1431 insert(c, LM_TC_TEX);
1436 if (strchr("{}", c)) {
1437 insert(c, LM_TC_TEX);
1443 niceInsert(MathAtom(new MathBraceInset));
1451 if (strchr("$%", c)) {
1452 insert(MathAtom(new MathSpecialCharInset(c)));
1453 lastcode_ = LM_TC_VAR;
1457 if (isalpha(c) && lastcode_ == LM_TC_GREEK) {
1458 insert(c, LM_TC_VAR);
1462 if (isalpha(c) && lastcode_ == LM_TC_GREEK1) {
1463 insert(c, LM_TC_VAR);
1464 lastcode_ = LM_TC_VAR;
1469 insert(c, LM_TC_TEX);
1470 //bv->owner()->message(_("TeX mode"));
1474 // no special circumstances, so insert the character without any fuss
1475 insert(c, lastcode_ == LM_TC_MIN ? MathCharInset::nativeCode(c) : lastcode_);
1476 lastcode_ = LM_TC_MIN;
1482 MathCursorPos MathCursor::normalAnchor() const
1484 if (Anchor_.size() < Cursor_.size()) {
1486 lyxerr << "unusual Anchor size\n";
1489 //lyx::Assert(Anchor_.size() >= Cursor_.size());
1490 // use Anchor on the same level as Cursor
1491 MathCursorPos normal = Anchor_[Cursor_.size() - 1];
1492 if (Cursor_.size() < Anchor_.size() && !(normal < cursor())) {
1493 // anchor is behind cursor -> move anchor behind the inset
1500 void MathCursor::stripFromLastEqualSign()
1502 // find position of last '=' in the array
1503 MathArray & ar = cursor().cell();
1504 MathArray::const_iterator et = ar.end();
1505 for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
1506 if ((*it)->getChar() == '=')
1509 // delete everything behind this position
1510 ar.erase(et - ar.begin(), ar.size());
1515 void MathCursor::setSelection(cursor_type const & where, size_type n)
1524 string MathCursor::info() const
1528 prevAtom()->infoize(os);