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.
19 #pragma implementation
29 #include "mathed/support.h"
30 #include "formulabase.h"
31 #include "math_cursor.h"
32 #include "math_arrayinset.h"
33 #include "math_bigopinset.h"
34 #include "math_symbolinset.h"
35 #include "math_decorationinset.h"
36 #include "math_deliminset.h"
37 #include "math_dotsinset.h"
38 #include "math_fracinset.h"
39 #include "math_funcinset.h"
40 #include "math_funcliminset.h"
41 #include "math_gridinset.h"
42 #include "math_macro.h"
43 #include "math_macroarg.h"
44 #include "math_macrotable.h"
45 #include "math_macrotemplate.h"
46 #include "math_matrixinset.h"
47 #include "math_rootinset.h"
48 #include "math_spaceinset.h"
49 #include "math_sqrtinset.h"
50 #include "support/lstrings.h"
51 #include "math_scriptinset.h"
52 #include "math_parser.h"
64 void grab(MathCursor const & cursor)
69 cursor.getSelection(i1, i2);
70 if (i1.idx_ == i2.idx_)
71 data_.push_back(MathArray(i1.cell(), i1.pos_, i2.pos_));
73 std::vector<int> indices = i1.par_->idxBetween(i1.idx_, i2.idx_);
74 for (unsigned i = 0; i < indices.size(); ++i)
75 data_.push_back(i1.cell(indices[i]));
79 void erase(MathCursor & cursor)
83 cursor.getSelection(i1, i2);
84 if (i1.idx_ == i2.idx_) {
85 i1.cell().erase(i1.pos_, i2.pos_);
87 std::vector<int> indices = i1.par_->idxBetween(i1.idx_, i2.idx_);
88 for (unsigned i = 0; i < indices.size(); ++i)
89 i1.cell(indices[i]).erase();
94 void paste(MathCursor & cursor) const
96 cursor.insert(glue());
99 // glues selection to one cell
100 MathArray glue() const
103 for (unsigned i = 0; i < data_.size(); ++i)
104 ar.push_back(data_[i]);
113 std::vector<MathArray> data_;
117 Selection theSelection;
120 std::ostream & operator<<(std::ostream & os, MathCursorPos const & p)
122 os << "(par: " << p.par_ << " idx: " << p.idx_
123 << " pos: " << p.pos_ << ")";
130 MathCursor::MathCursor(InsetFormulaBase * formula)
131 : formula_(formula), lastcode_(LM_TC_MIN), imacro_(0), selection_(false)
137 MathCursor::~MathCursor()
142 void MathCursor::pushLeft(MathInset * par)
146 par->idxFirst(p.idx_, p.pos_);
147 Cursor_.push_back(p);
151 void MathCursor::pushRight(MathInset * par)
156 par->idxLast(p.idx_, p.pos_);
157 Cursor_.push_back(p);
161 bool MathCursor::popLeft()
163 if (Cursor_.size() <= 1)
169 bool MathCursor::popRight()
171 if (Cursor_.size() <= 1)
179 MathInset * MathCursor::parInset(int i) const
181 return Cursor_[i].par_;
185 void MathCursor::dump(char const * what) const
189 lyxerr << "MC: " << what << "\n";
190 for (unsigned i = 0; i < Cursor_.size(); ++i)
191 lyxerr << " i: " << i
192 << " pos: " << Cursor_[i].pos_
193 << " idx: " << Cursor_[i].idx_
194 << " par: " << Cursor_[i].par_ << "\n";
196 //lyxerr << " sel: " << selection_ << " data: " << array() << "\n";
200 void MathCursor::seldump(char const * str) const
202 //lyxerr << "SEL: " << str << ": '" << theSelection << "'\n";
206 lyxerr << "\n\n\n=================vvvvvvvvvvvvv======================= "
207 << str << "\ntheSelection: " << selection_
208 << " '" << theSelection.glue() << "'\n";
209 for (unsigned int i = 0; i < Cursor_.size(); ++i)
210 lyxerr << Cursor_[i].par_ << "\n'" << Cursor_[i].cell() << "'\n";
212 for (unsigned int i = 0; i < Anchor_.size(); ++i)
213 lyxerr << Anchor_[i].par_ << "\n'" << Anchor_[i].cell() << "'\n";
214 //lyxerr << "\ncursor.pos_: " << pos();
215 //lyxerr << "\nanchor.pos_: " << anchor().pos_;
216 lyxerr << "\n===================^^^^^^^^^^^^=====================\n\n\n";
220 bool MathCursor::isInside(MathInset const * p) const
222 for (unsigned i = 0; i < Cursor_.size(); ++i)
223 if (parInset(i) == p)
229 bool MathCursor::openable(MathInset * p, bool sel, bool useupdown) const
234 if (!(p->isActive() || (useupdown && p->isScriptInset())))
238 // we can't move into anything new during selection
239 if (Cursor_.size() == Anchor_.size())
241 if (p != Anchor_[Cursor_.size()].par_)
248 bool MathCursor::posLeft()
257 bool MathCursor::posRight()
266 bool MathCursor::left(bool sel)
270 // was MacroModeBack()
271 if (!imacro_->name().empty()) {
272 imacro_->setName(imacro_->name().substr(0, imacro_->name().length()-1));
273 imacro_->metrics(imacro_->size());
281 MathInset * p = prevInset();
282 if (openable(p, sel, false)) {
287 return posLeft() || idxLeft() || popLeft();
291 bool MathCursor::right(bool sel)
301 MathInset * p = nextInset();
302 if (openable(p, sel, false)) {
307 return posRight() || idxRight() || popRight();
311 void MathCursor::first()
314 pushLeft(outerPar());
318 void MathCursor::last()
325 void MathCursor::setPos(int x, int y)
328 //lyxerr << "MathCursor::setPos x: " << x << " y: " << y << "\n";
331 lastcode_ = LM_TC_MIN;
334 cursor().par_ = outerPar();
339 //lyxerr << "found idx: " << idx_ << " cursor: " << pos() << "\n";
340 int distmin = 1 << 30; // large enough
341 for (int i = 0; i < par()->nargs(); ++i) {
342 MathXArray const & ar = par()->xcell(i);
343 int x1 = x - ar.xo();
344 int y1 = y - ar.yo();
345 int c = ar.x2pos(x1);
346 int xx = abs(x1 - ar.pos2x(c));
348 //lyxerr << "idx: " << i << " xx: " << xx << " yy: " << yy
349 // << " c: " << c << " xo: " << ar.xo() << "\n";
350 if (yy + xx <= distmin) {
356 //lyxerr << "found idx: " << idx() << " cursor: "
358 MathInset * n = nextInset();
359 MathInset * p = prevInset();
360 if (openable(n, selection_, true) && n->covers(x, y))
362 else if (openable(p, selection_, true) && p->covers(x, y))
371 void MathCursor::home()
376 if (!par()->idxHome(idx(), pos()))
382 void MathCursor::end()
387 if (!par()->idxEnd(idx(), pos()))
393 void MathCursor::plainErase()
395 array().erase(pos());
399 void MathCursor::insert(char c, MathTextCodes t)
401 //lyxerr << "inserting '" << c << "'\n";
408 if (imacro_ && !(MathIsAlphaFont(t) || t == LM_TC_MIN))
412 if (MathIsAlphaFont(t) || t == LM_TC_MIN) {
413 // was MacroModeinsert(c);
414 imacro_->setName(imacro_->name() + c);
419 array().insert(pos(), c, t);
424 void MathCursor::insert(MathInset * p)
435 array().insert(pos(), p);
440 void MathCursor::insert(MathArray const & ar)
446 array().insert(pos(), ar);
451 void MathCursor::backspace()
472 void MathCursor::erase()
483 // delete empty cells if necessary
484 if (pos() == 0 && array().empty()) {
487 par()->idxDelete(idx(), popit, removeit);
488 if (popit && popLeft() && removeit)
500 void MathCursor::delLine()
509 if (par()->nrows() > 1)
510 par()->delRow(row());
514 bool MathCursor::up(bool sel)
521 return idxUp() || popLeft();
523 // check whether we could move into an inset on the right or on the left
524 MathInset * p = nextInset();
527 if (p->idxFirstUp(idxx, poss)) {
539 if (p->idxLastUp(idxx, poss)) {
548 return idxUp() || popLeft();
552 bool MathCursor::down(bool sel)
559 return idxDown() || popLeft();
561 // check whether we could move into an inset on the right or on the left
562 MathInset * p = nextInset();
566 if (p->idxFirstDown(idxx, poss)) {
579 if (p->idxLastDown(idxx, poss)) {
588 return idxDown() || popLeft();
592 bool MathCursor::toggleLimits()
594 MathScriptInset * p = prevScriptInset();
597 int old = p->limits();
598 p->limits(old < 0 ? 1 : -1);
599 return old != p->limits();
603 void MathCursor::setSize(MathStyles size)
605 par()->userSetSize(size);
610 void MathCursor::interpret(string const & s)
612 //lyxerr << "interpret: '" << s << "'\n";
613 //lyxerr << "in: " << in_word_set(s) << " \n";
618 if (s[0] == '^' || s[0] == '_') {
619 bool const up = (s[0] == '^');
621 MathScriptInset * p = prevScriptInset();
623 MathInset * b = prevInset();
624 if (b && b->isScriptable()) {
625 p = new MathScriptInset(up, !up, b->clone());
629 p = new MathScriptInset(up, !up);
644 if (s[0] == '!' || s[0] == ',' || s[0] == ':' || s[0] == ';') {
645 int sp = (s[0] == ',') ? 1:((s[0] == ':') ? 2:((s[0] == ';') ? 3: 0));
646 insert(new MathSpaceInset(sp));
651 latexkeys const * l = in_word_set(s);
655 p = new MathRootInset;
656 else if (MathMacroTable::hasTemplate(s))
657 p = new MathMacro(MathMacroTable::provideTemplate(s));
658 else if (s.size() > 7 && s.substr(0, 7) == "matrix ") {
663 istringstream is(s.substr(7).c_str());
664 is >> m >> n >> v_align >> h_align;
668 MathArrayInset * pp = new MathArrayInset(m, n);
669 pp->valign(v_align[0]);
674 p = new MathFuncInset(s);
678 p = new MathBigopInset(l);
682 p = new MathFuncLimInset(l);
686 p = new MathSymbolInset(l);
690 p = new MathFracInset("stackrel");
694 p = new MathFracInset("frac");
698 p = new MathSqrtInset;
701 case LM_TK_DECORATION:
702 p = new MathDecorationInset(l);
706 p = new MathSpaceInset(l->id);
710 p = new MathDotsInset(l);
714 p = new MathMacro(MathMacroTable::provideTemplate(s));
718 p = new MathFuncInset(l->name);
728 right(); // do not push for e.g. MathSymbolInset
731 p->metrics(p->size());
736 void MathCursor::macroModeOpen()
739 imacro_ = new MathFuncInset("");
740 array().insert(pos(), imacro_);
744 lyxerr << "Math Warning: Already in macro mode" << endl;
748 void MathCursor::macroModeClose()
751 string name = imacro_->name();
760 void MathCursor::selCopy()
764 theSelection.grab(*this);
770 void MathCursor::selCut()
774 theSelection.grab(*this);
775 theSelection.erase(*this);
778 theSelection.clear();
783 void MathCursor::selDel()
787 theSelection.erase(*this);
793 void MathCursor::selPaste()
796 theSelection.paste(*this);
801 void MathCursor::selHandle(bool sel)
803 if (sel == selection_)
806 theSelection.clear();
812 void MathCursor::selStart()
818 theSelection.clear();
824 void MathCursor::selClear()
831 void MathCursor::drawSelection(Painter & pain) const
838 getSelection(i1, i2);
840 //lyxerr << "selection from: " << i1 << " to " << i2 << "\n";
842 if (i1.idx_ == i2.idx_) {
843 MathXArray & c = i1.xcell();
844 int x1 = c.xo() + c.pos2x(i1.pos_);
845 int y1 = c.yo() - c.ascent();
846 int x2 = c.xo() + c.pos2x(i2.pos_);
847 int y2 = c.yo() + c.descent();
848 pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
851 std::vector<int> indices = i1.par_->idxBetween(i1.idx_, i2.idx_);
852 for (unsigned i = 0; i < indices.size(); ++i) {
853 MathXArray & c = i1.xcell(indices[i]);
855 int y1 = c.yo() - c.ascent();
856 int x2 = c.xo() + c.width();
857 int y2 = c.yo() + c.descent();
858 pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
864 void MathCursor::handleFont(MathTextCodes t)
869 getSelection(i1, i2);
870 if (i1.idx_ == i2.idx_) {
871 MathArray & ar = i1.cell();
872 for (int pos = i1.pos_; pos != i2.pos_; ++pos)
873 if (isalnum(ar.getChar(pos))) {
874 MathTextCodes c = ar.getCode(pos) == t ? LM_TC_VAR : t;
879 lastcode_ = (lastcode_ == t) ? LM_TC_VAR : t;
883 void MathCursor::handleAccent(string const & name)
885 latexkeys const * l = in_word_set(name);
887 handleNest(new MathDecorationInset(l));
891 void MathCursor::handleDelim(int l, int r)
893 handleNest(new MathDelimInset(l, r));
897 void MathCursor::handleNest(MathInset * p)
901 p->cell(0) = theSelection.glue();
908 void MathCursor::getPos(int & x, int & y)
910 x = xarray().xo() + xarray().pos2x(pos());
915 MathTextCodes MathCursor::nextCode() const
917 return array().getCode(pos());
921 MathTextCodes MathCursor::prevCode() const
923 return array().getCode(pos() - 1);
927 MathInset * MathCursor::par() const
929 return cursor().par_;
933 InsetFormulaBase const * MathCursor::formula()
939 int MathCursor::idx() const
941 return cursor().idx_;
945 int & MathCursor::idx()
947 return cursor().idx_;
951 int MathCursor::pos() const
953 return cursor().pos_;
957 int & MathCursor::pos()
959 return cursor().pos_;
963 bool MathCursor::inMacroMode() const
969 bool MathCursor::selection() const
975 void MathCursor::clearLastCode()
977 lastcode_ = LM_TC_MIN;
981 void MathCursor::setLastCode(MathTextCodes t)
987 MathTextCodes MathCursor::getLastCode() const
993 MathArrayInset * MathCursor::enclosingArray(int & idx) const
995 for (int i = Cursor_.size() - 1; i >= 0; --i) {
996 if (Cursor_[i].par_->isArray()) {
997 idx = Cursor_[i].idx_;
998 return static_cast<MathArrayInset *>(Cursor_[i].par_);
1005 void MathCursor::pullArg(bool goright)
1009 MathArray a = array();
1012 array().insert(pos(), a);
1019 MathStyles MathCursor::style() const
1021 return xarray().style();
1025 void MathCursor::normalize() const
1027 #ifdef WITH_WARNINGS
1028 #warning This is evil!
1030 MathCursor * it = const_cast<MathCursor *>(this);
1033 lyxerr << "this should not really happen - 1: " << idx() << "\n";
1034 if (idx() >= par()->nargs()) {
1035 lyxerr << "this should not really happen - 2: "
1036 << idx() << " " << par()->nargs() << "\n";
1039 it->idx() = max(idx(), 0);
1040 it->idx() = min(idx(), par()->nargs() - 1);
1043 lyxerr << "this should not really happen - 3: " << pos() << "\n";
1044 if (pos() > size()) {
1045 lyxerr << "this should not really happen - 4: "
1046 << pos() << " " << size() << "\n";
1049 it->pos() = max(pos(), 0);
1050 it->pos() = min(pos(), size());
1054 int MathCursor::size() const
1056 return array().size();
1060 int MathCursor::col() const
1062 return par()->col(idx());
1066 int MathCursor::row() const
1068 return par()->row(idx());
1073 char MathCursorPos::getChar() const
1075 return array().getChar(pos());
1079 string MathCursorPos::readString()
1082 int code = nextCode();
1083 for ( ; OK() && nextCode() == code; Next())
1091 MathInset * MathCursor::prevInset() const
1096 return array().nextInset(pos() - 1);
1100 MathInset * MathCursor::nextInset() const
1103 return array().nextInset(pos());
1107 MathScriptInset * MathCursor::prevScriptInset() const
1110 MathInset * p = prevInset();
1111 return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
1115 MathSpaceInset * MathCursor::prevSpaceInset() const
1118 MathInset * p = prevInset();
1119 return (p && p->isSpaceInset()) ? static_cast<MathSpaceInset *>(p) : 0;
1123 MathArray & MathCursor::array() const
1125 static MathArray dummy;
1127 lyxerr << "############ par_ not valid\n";
1131 if (idx() < 0 || idx() >= par()->nargs()) {
1132 lyxerr << "############ idx_ " << idx() << " not valid\n";
1136 return cursor().cell();
1140 MathXArray & MathCursor::xarray() const
1142 return cursor().xcell();
1146 int MathCursor::xpos() const
1149 return xarray().pos2x(pos());
1153 void MathCursor::gotoX(int x)
1155 pos() = xarray().x2pos(x);
1159 void MathCursor::idxNext()
1161 par()->idxNext(idx(), pos());
1165 void MathCursor::idxPrev()
1167 par()->idxPrev(idx(), pos());
1171 void MathCursor::splitCell()
1173 if (idx() == par()->nargs() - 1)
1175 MathArray ar = array();
1177 array().erase(pos(), size());
1180 array().insert(0, ar);
1184 void MathCursor::breakLine()
1186 MathMatrixInset * p = outerPar();
1187 if (p->getType() == LM_OT_SIMPLE || p->getType() == LM_OT_EQUATION) {
1188 p->mutate(LM_OT_EQNARRAY);
1196 const int r = row();
1197 for (int c = col() + 1; c < p->ncols(); ++c) {
1198 const int i1 = p->index(r, c);
1199 const int i2 = p->index(r + 1, c);
1200 lyxerr << "swapping cells " << i1 << " and " << i2 << "\n";
1201 p->cell(i1).swap(p->cell(i2));
1206 p->cell(idx()).swap(p->cell(idx() + p->ncols() - 1));
1211 char MathCursor::valign() const
1214 MathArrayInset * p = enclosingArray(idx);
1215 return p ? p->valign() : 0;
1219 char MathCursor::halign() const
1222 MathArrayInset * p = enclosingArray(idx);
1223 return p ? p->halign(idx % p->ncols()) : 0;
1227 MathCursorPos MathCursor::firstSelectionPos() const
1229 MathCursorPos anc = normalAnchor();
1230 return anc < cursor() ? anc : cursor();
1234 MathCursorPos MathCursor::lastSelectionPos() const
1236 MathCursorPos anc = normalAnchor();
1237 return anc < cursor() ? cursor() : anc;
1241 void MathCursor::getSelection(MathCursorPos & i1, MathCursorPos & i2) const
1243 MathCursorPos anc = normalAnchor();
1244 if (anc < cursor()) {
1254 MathCursorPos & MathCursor::cursor()
1256 return Cursor_.back();
1260 MathCursorPos const & MathCursor::cursor() const
1262 return Cursor_.back();
1267 ////////////////////////////////////////////////////////////////////////
1270 bool operator==(MathCursorPos const & ti, MathCursorPos const & it)
1272 return ti.par_ == it.par_ && ti.idx_ == it.idx_ && ti.pos_ == it.pos_;
1276 bool operator<(MathCursorPos const & ti, MathCursorPos const & it)
1278 if (ti.par_ != it.par_) {
1279 lyxerr << "can't compare cursor and anchor in different insets\n";
1282 if (ti.idx_ != it.idx_)
1283 return ti.idx_ < it.idx_;
1284 return ti.pos_ < it.pos_;
1288 MathArray & MathCursorPos::cell(int idx) const
1290 return par_->cell(idx);
1293 MathArray & MathCursorPos::cell() const
1295 return par_->cell(idx_);
1299 MathXArray & MathCursorPos::xcell(int idx) const
1301 return par_->xcell(idx);
1305 MathXArray & MathCursorPos::xcell() const
1307 return par_->xcell(idx_);
1311 MathCursorPos MathCursor::normalAnchor() const
1313 // use Anchor on the same level as Cursor
1314 MathCursorPos normal = Anchor_[Cursor_.size() - 1];
1315 if (Cursor_.size() < Anchor_.size() && !(normal < cursor())) {
1316 // anchor is behind cursor -> move anchor behind the inset
1319 //lyxerr << "normalizing: from " << Anchor_[Anchor_.size() - 1] << " to "
1320 // << normal << "\n";
1325 bool MathCursor::idxUp()
1327 int x = xarray().pos2x(pos());
1328 if (!par()->idxUp(idx(), pos()))
1330 pos() = xarray().x2pos(x);
1335 bool MathCursor::idxDown()
1337 int x = xarray().pos2x(pos());
1338 if (!par()->idxDown(idx(), pos()))
1340 pos() = xarray().x2pos(x);
1345 bool MathCursor::idxLeft()
1347 return par()->idxLeft(idx(), pos());
1351 bool MathCursor::idxRight()
1353 return par()->idxRight(idx(), pos());
1357 MathMatrixInset * MathCursor::outerPar() const
1360 static_cast<MathMatrixInset *>(const_cast<MathInset *>(formula_->par()));