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_decorationinset.h"
35 #include "math_deliminset.h"
36 #include "math_dotsinset.h"
37 #include "math_fracinset.h"
38 #include "math_funcinset.h"
39 #include "math_gridinset.h"
40 #include "math_macro.h"
41 #include "math_macroarg.h"
42 #include "math_macrotable.h"
43 #include "math_macrotemplate.h"
44 #include "math_matrixinset.h"
45 #include "math_rootinset.h"
46 #include "math_spaceinset.h"
47 #include "math_sqrtinset.h"
48 #include "support/lstrings.h"
49 #include "math_scriptinset.h"
50 #include "math_parser.h"
62 void grab(MathCursor const & cursor)
67 cursor.getSelection(i1, i2);
68 if (i1.idx_ == i2.idx_)
69 data_.push_back(MathArray(i1.cell(), i1.pos_, i2.pos_));
71 std::vector<int> indices = i1.par_->idxBetween(i1.idx_, i2.idx_);
72 for (unsigned i = 0; i < indices.size(); ++i)
73 data_.push_back(i1.cell(indices[i]));
77 void erase(MathCursor & cursor)
81 cursor.getSelection(i1, i2);
82 if (i1.idx_ == i2.idx_) {
83 i1.cell().erase(i1.pos_, i2.pos_);
85 std::vector<int> indices = i1.par_->idxBetween(i1.idx_, i2.idx_);
86 for (unsigned i = 0; i < indices.size(); ++i)
87 i1.cell(indices[i]).erase();
92 void paste(MathCursor & cursor) const
94 cursor.insert(glue());
97 // glues selection to one cell
98 MathArray glue() const
101 for (unsigned i = 0; i < data_.size(); ++i)
102 ar.push_back(data_[i]);
111 std::vector<MathArray> data_;
115 Selection theSelection;
118 std::ostream & operator<<(std::ostream & os, MathCursorPos const & p)
120 os << "(par: " << p.par_ << " idx: " << p.idx_
121 << " pos: " << p.pos_ << ")";
128 MathCursor::MathCursor(InsetFormulaBase * formula)
129 : formula_(formula), lastcode_(LM_TC_MIN), imacro_(0), selection_(false)
135 void MathCursor::push(MathInset * par, bool first)
140 par->idxFirst(p.idx_, p.pos_);
142 par->idxLast(p.idx_, p.pos_);
143 Cursor_.push_back(p);
147 bool MathCursor::pop()
149 if (Cursor_.size() <= 1)
156 MathInset * MathCursor::parInset(int i) const
158 return Cursor_[i].par_;
162 void MathCursor::dump(char const * what) const
166 lyxerr << "MC: " << what << "\n";
167 for (unsigned i = 0; i < Cursor_.size(); ++i)
168 lyxerr << " i: " << i
169 << " pos: " << Cursor_[i].pos_
170 << " idx: " << Cursor_[i].idx_
171 << " par: " << Cursor_[i].par_ << "\n";
173 //lyxerr << " sel: " << selection_ << " data: " << array() << "\n";
177 void MathCursor::seldump(char const *) const
179 //lyxerr << "SEL: " << str << ": '" << theSelection << "'\n";
183 //lyxerr << "\n\n\\n=================vvvvvvvvvvvvv======================= "
184 // << str << "\ntheSelection: " << theSelection;
185 //for (unsigned int i = 0; i < Cursor_.size(); ++i)
186 // lyxerr << Cursor_[i].par_ << "\n'" << Cursor_[i].cell() << "'\n";
187 //lyxerr << "\ncursor.pos_: " << cursor().pos_;
188 //lyxerr << "\nanchor.pos_: " << anchor().pos_;
189 //lyxerr << "\n===================^^^^^^^^^^^^=====================\n\n\n";
193 bool MathCursor::isInside(MathInset * p) const
195 for (unsigned i = 0; i < Cursor_.size(); ++i)
196 if (parInset(i) == p)
202 bool MathCursor::openable(MathInset * p, bool sel, bool useupdown) const
206 if (!(p->isActive() || (useupdown && p->isScriptInset())))
210 // we can't move into anything new during selection
211 if (Cursor_.size() == Anchor_.size())
213 if (p != Anchor_[Cursor_.size()].par_)
220 bool MathCursor::plainLeft()
222 return array().prev(cursor().pos_);
226 bool MathCursor::left(bool sel)
230 // was MacroModeBack()
231 if (!imacro_->name().empty()) {
232 imacro_->setName(imacro_->name().substr(0, imacro_->name().length()-1));
233 imacro_->metrics(imacro_->size());
241 MathInset * p = prevInset();
242 if (openable(p, sel, false)) {
249 if (cursor().par_->idxLeft(cursor().idx_, cursor().pos_))
257 bool MathCursor::plainRight()
259 return array().next(cursor().pos_);
263 bool MathCursor::right(bool sel)
273 MathInset * p = nextInset();
274 if (openable(p, sel, false)) {
278 if (array().next(cursor().pos_))
280 if (cursor().par_->idxRight(cursor().idx_, cursor().pos_))
284 array().next(cursor().pos_);
289 void MathCursor::first()
292 push(formula_->par(), true);
296 void MathCursor::last()
299 push(formula_->par(), false);
303 void MathCursor::setPos(int x, int y)
306 //lyxerr << "MathCursor::setPos x: " << x << " y: " << y << "\n";
309 lastcode_ = LM_TC_MIN;
312 cursor().par_ = formula()->par();
317 //lyxerr << "found idx: " << idx_ << " cursor: " << cursor().pos_ << "\n";
318 int distmin = 1 << 30; // large enough
319 for (int i = 0; i < cursor().par_->nargs(); ++i) {
320 MathXArray const & ar = cursor().par_->xcell(i);
321 int x1 = x - ar.xo();
322 int y1 = y - ar.yo();
323 int c = ar.x2pos(x1);
324 int xx = abs(x1 - ar.pos2x(c));
326 //lyxerr << "idx: " << i << " xx: " << xx << " yy: " << yy
327 // << " c: " << c << " xo: " << ar.xo() << "\n";
328 if (yy + xx <= distmin) {
334 //lyxerr << "found idx: " << cursor().idx_ << " cursor: "
335 // << cursor().pos_ << "\n";
336 MathInset * n = nextInset();
337 MathInset * p = prevInset();
338 if (openable(n, selection_, true) && n->covers(x, y))
340 else if (openable(p, selection_, true) && p->covers(x, y)) {
350 void MathCursor::home()
355 if (!cursor().par_->idxHome(cursor().idx_, cursor().pos_))
361 void MathCursor::end()
366 if (!cursor().par_->idxEnd(cursor().idx_, cursor().pos_)) {
368 array().next(cursor().pos_);
374 void MathCursor::plainErase()
376 array().erase(cursor().pos_);
380 void MathCursor::insert(char c, MathTextCodes t)
382 //lyxerr << "inserting '" << c << "'\n";
389 if (imacro_ && !(MathIsAlphaFont(t) || t == LM_TC_MIN))
393 if (MathIsAlphaFont(t) || t == LM_TC_MIN) {
394 // was MacroModeinsert(c);
395 imacro_->setName(imacro_->name() + c);
400 array().insert(cursor().pos_, c, t);
401 array().next(cursor().pos_);
405 void MathCursor::insert(MathInset * p)
416 array().insert(cursor().pos_, p);
417 array().next(cursor().pos_);
421 void MathCursor::insert(MathArray const & ar)
427 array().insert(cursor().pos_, ar);
428 cursor().pos_ += ar.size();
432 void MathCursor::erase()
443 // delete empty cells if necessary
444 if (cursor().pos_ == 0 && array().size() == 0) {
447 cursor().par_->idxDelete(cursor().idx_, popit, removeit);
448 if (popit && pop() && removeit)
453 if (cursor().pos_ < array().size())
460 void MathCursor::delLine()
469 if (cursor().par_->nrows() > 1)
470 cursor().par_->delRow(row());
474 bool MathCursor::up(bool sel)
481 int x = xarray().pos2x(cursor().pos_);
482 if (cursor().idxDown()) {
483 cursor().pos_ = xarray().x2pos(x);
491 // check whether we could move into an inset on the right or on the left
492 MathInset * p = nextInset();
495 if (p->idxFirstUp(idx, pos)) {
507 if (p->idxLastUp(idx, pos)) {
517 int x = xarray().pos2x(cursor().pos_);
518 if (cursor().idxUp()) {
519 cursor().pos_ = xarray().x2pos(x);
528 bool MathCursor::down(bool sel)
535 int x = xarray().pos2x(cursor().pos_);
536 if (cursor().idxDown()) {
537 cursor().pos_ = xarray().x2pos(x);
545 // check whether we could move into an inset on the right or on the left
546 MathInset * p = nextInset();
549 if (p->idxFirstDown(idx, pos)) {
561 if (p->idxLastDown(idx, pos)) {
571 int x = xarray().pos2x(cursor().pos_);
572 if (cursor().idxDown()) {
573 cursor().pos_ = xarray().x2pos(x);
582 bool MathCursor::toggleLimits()
586 MathInset * p = prevInset();
587 int old = p->limits();
588 p->limits(old < 0 ? 1 : -1);
589 return old != p->limits();
593 void MathCursor::setSize(MathStyles size)
595 cursor().par_->userSetSize(size);
600 void MathCursor::interpret(string const & s)
602 //lyxerr << "interpret: '" << s << "'\n";
603 //lyxerr << "in: " << in_word_set(s) << " \n";
605 if (s.size() && (s[0] == '^' || s[0] == '_')) {
606 bool const up = (s[0] == '^');
608 MathScriptInset * p = prevScriptInset();
610 MathInset * b = prevInset();
611 if (b && b->isScriptable()) {
612 p = new MathScriptInset(up, !up, b->clone());
616 p = new MathScriptInset(up, !up);
626 cursor().idx_ = up ? 0 : 1;
632 if (s[0] == '!' || s[0] == ',' || s[0] == ':' || s[0] == ';') {
633 int sp = (s[0] == ',') ? 1:((s[0] == ':') ? 2:((s[0] == ';') ? 3: 0));
634 insert(new MathSpaceInset(sp));
639 latexkeys const * l = in_word_set(s);
643 p = new MathRootInset;
644 else if (MathMacroTable::hasTemplate(s))
645 p = new MathMacro(MathMacroTable::provideTemplate(s));
646 else if (s.size() > 7 && s.substr(0, 7) == "matrix ") {
651 istringstream is(s.substr(7).c_str());
652 is >> m >> n >> v_align >> h_align;
656 MathArrayInset * pp = new MathArrayInset(m, n);
657 pp->valign(v_align[0]);
662 p = new MathFuncInset(s, LM_OT_UNDEF);
666 p = new MathBigopInset(s, l->id);
670 MathTextCodes code = static_cast<MathTextCodes>(l->id);
672 insert(l->id, MathIsBOPS(code) ? LM_TC_BOPS : LM_TC_SYMB);
674 p = new MathFuncInset(l->name);
679 p = new MathFracInset("stackrel");
683 p = new MathFracInset("frac");
687 p = new MathSqrtInset;
690 case LM_TK_DECORATION:
691 p = new MathDecorationInset(l->name, l->id);
695 p = new MathFuncInset(l->name, LM_OT_FUNCLIM);
699 p = new MathSpaceInset(l->id);
703 p = new MathDotsInset(l->name, l->id);
707 p = new MathMacro(MathMacroTable::provideTemplate(s));
711 p = new MathFuncInset(l->name);
717 bool oldsel = selection_;
723 right(); // do not push for e.g. MathBigopInset
727 p->metrics(p->size());
732 void MathCursor::macroModeOpen()
735 imacro_ = new MathFuncInset("");
738 lyxerr << "Math Warning: Already in macro mode" << endl;
742 void MathCursor::macroModeClose()
745 string name = imacro_->name();
754 void MathCursor::selCopy()
758 theSelection.grab(*this);
764 void MathCursor::selCut()
768 theSelection.grab(*this);
769 theSelection.erase(*this);
775 void MathCursor::selDel()
779 theSelection.erase(*this);
785 void MathCursor::selPaste()
788 theSelection.paste(*this);
793 void MathCursor::selHandle(bool sel)
795 if (sel && !selection_)
797 if (!sel && selection_)
802 void MathCursor::selStart()
813 void MathCursor::selClear()
819 void MathCursor::drawSelection(Painter & pain) const
826 getSelection(i1, i2);
828 //lyxerr << "selection from: " << i1 << " to " << i2 << "\n";
830 if (i1.idx_ == i2.idx_) {
831 MathXArray & c = i1.xcell();
832 int x1 = c.xo() + c.pos2x(i1.pos_);
833 int y1 = c.yo() - c.ascent();
834 int x2 = c.xo() + c.pos2x(i2.pos_);
835 int y2 = c.yo() + c.descent();
836 pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
839 std::vector<int> indices = i1.par_->idxBetween(i1.idx_, i2.idx_);
840 for (unsigned i = 0; i < indices.size(); ++i) {
841 MathXArray & c = i1.xcell(indices[i]);
843 int y1 = c.yo() - c.ascent();
844 int x2 = c.xo() + c.width();
845 int y2 = c.yo() + c.descent();
846 pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, LColor::selection);
852 void MathCursor::handleFont(MathTextCodes t)
857 getSelection(i1, i2);
858 if (i1.idx_ == i2.idx_) {
859 MathArray & ar = i1.cell();
860 for (int pos = i1.pos_; pos != i2.pos_; ar.next(pos))
861 if (!ar.isInset(pos) && isalnum(ar.getChar(pos))) {
862 MathTextCodes c = ar.getCode(pos) == t ? LM_TC_VAR : t;
867 lastcode_ = (lastcode_ == t) ? LM_TC_VAR : t;
871 void MathCursor::handleAccent(string const & name, int code)
873 MathDecorationInset * p = new MathDecorationInset(name, code);
876 p->cell(0) = theSelection.glue();
883 void MathCursor::handleDelim(int l, int r)
885 MathDelimInset * p = new MathDelimInset(l, r);
888 p->cell(0) = theSelection.glue();
896 void MathCursor::getPos(int & x, int & y)
898 x = xarray().xo() + xarray().pos2x(cursor().pos_);
903 MathTextCodes MathCursor::nextCode() const
905 return array().getCode(cursor().pos_);
909 MathTextCodes MathCursor::prevCode() const
911 return array().getCode(cursor().pos_ - 1);
915 MathInset * MathCursor::par() const
917 return cursor().par_;
921 InsetFormulaBase const * MathCursor::formula()
927 int MathCursor::pos() const
929 return cursor().pos_;
933 bool MathCursor::inMacroMode() const
939 bool MathCursor::selection() const
945 void MathCursor::clearLastCode()
947 lastcode_ = LM_TC_MIN;
951 void MathCursor::setLastCode(MathTextCodes t)
957 MathTextCodes MathCursor::getLastCode() const
963 MathInset * MathCursor::enclosing(MathInsetTypes t, int & idx) const
965 for (int i = Cursor_.size() - 1; i >= 0; --i) {
966 //lyxerr << "checking level " << i << "\n";
967 if (Cursor_[i].par_->getType() == t) {
968 idx = Cursor_[i].idx_;
969 return Cursor_[i].par_;
976 void MathCursor::pullArg(bool goright)
980 MathArray a = array();
983 array().insert(cursor().pos_, a);
985 cursor().pos_ += a.size();
990 MathStyles MathCursor::style() const
992 return xarray().style();
996 void MathCursor::normalize() const
999 #warning This is evil!
1001 MathCursor * it = const_cast<MathCursor *>(this);
1003 if (cursor().idx_ < 0 || cursor().idx_ > cursor().par_->nargs())
1004 lyxerr << "this should not really happen - 1\n";
1005 it->cursor().idx_ = max(cursor().idx_, 0);
1006 it->cursor().idx_ = min(cursor().idx_, cursor().par_->nargs());
1008 if (cursor().pos_ < 0 || cursor().pos_ > array().size())
1009 lyxerr << "this should not really happen - 2\n";
1010 it->cursor().pos_ = max(cursor().pos_, 0);
1011 it->cursor().pos_ = min(cursor().pos_, array().size());
1015 int MathCursor::col() const
1017 return par()->col(cursor().idx_);
1021 int MathCursor::row() const
1023 return par()->row(cursor().idx_);
1028 char MathCursorPos::getChar() const
1030 return array().getChar(cursor().pos_);
1034 string MathCursorPos::readString()
1037 int code = nextCode();
1038 for ( ; OK() && nextCode() == code; Next())
1046 MathInset * MathCursor::prevInset() const
1049 int c = cursor().pos_;
1050 if (!array().prev(c))
1052 return array().nextInset(c);
1056 MathInset * MathCursor::nextInset() const
1059 return array().nextInset(cursor().pos_);
1063 MathScriptInset * MathCursor::prevScriptInset() const
1066 MathInset * p = array().prevInset(cursor().pos_);
1067 return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
1071 MathSpaceInset * MathCursor::prevSpaceInset() const
1074 MathInset * p = array().prevInset(cursor().pos_);
1075 return (p && p->isSpaceInset()) ? static_cast<MathSpaceInset *>(p) : 0;
1079 MathArray & MathCursor::array() const
1081 static MathArray dummy;
1082 if (!cursor().par_) {
1083 lyxerr << "############ par_ not valid\n";
1087 if (cursor().idx_ < 0 || cursor().idx_ >= cursor().par_->nargs()) {
1088 lyxerr << "############ idx_ " << cursor().idx_ << " not valid\n";
1092 return cursor().cell();
1096 MathXArray & MathCursor::xarray() const
1098 return cursor().xcell();
1102 bool MathCursor::nextIsInset() const
1104 return cursor().pos_ < array().size() && MathIsInset(nextCode());
1108 bool MathCursor::prevIsInset() const
1110 return cursor().pos_ > 0 && MathIsInset(prevCode());
1114 int MathCursor::xpos() const
1117 return xarray().pos2x(cursor().pos_);
1121 void MathCursor::gotoX(int x)
1123 cursor().pos_ = xarray().x2pos(x);
1127 void MathCursor::idxNext()
1129 cursor().par_->idxNext(cursor().idx_, cursor().pos_);
1133 void MathCursor::idxPrev()
1135 cursor().par_->idxPrev(cursor().idx_, cursor().pos_);
1139 void MathCursor::splitCell()
1141 if (cursor().idx_ == cursor().par_->nargs() - 1)
1143 MathArray ar = array();
1144 ar.erase(0, cursor().pos_);
1145 array().erase(cursor().pos_, array().size());
1148 array().insert(0, ar);
1152 void MathCursor::breakLine()
1154 MathMatrixInset * p = static_cast<MathMatrixInset *>(formula()->par());
1155 if (p->getType() == LM_OT_SIMPLE || p->getType() == LM_OT_EQUATION) {
1156 p->mutate(LM_OT_EQNARRAY);
1158 cursor().idx_ = p->nrows();
1164 const int r = row();
1165 for (int c = col() + 1; c < p->ncols(); ++c) {
1166 const int i1 = p->index(r, c);
1167 const int i2 = p->index(r + 1, c);
1168 lyxerr << "swapping cells " << i1 << " and " << i2 << "\n";
1169 p->cell(i1).swap(p->cell(i2));
1174 p->cell(cursor().idx_).swap(p->cell(cursor().idx_ + p->ncols() - 1));
1179 char MathCursor::valign() const
1183 static_cast<MathGridInset *>(enclosing(LM_OT_MATRIX, idx));
1184 return p ? p->valign() : 0;
1188 char MathCursor::halign() const
1192 static_cast<MathGridInset *>(enclosing(LM_OT_MATRIX, idx));
1193 return p ? p->halign(idx % p->ncols()) : 0;
1197 MathCursorPos MathCursor::firstSelectionPos() const
1199 MathCursorPos anc = normalAnchor();
1200 return anc < cursor() ? anc : cursor();
1204 MathCursorPos MathCursor::lastSelectionPos() const
1206 MathCursorPos anc = normalAnchor();
1207 return anc < cursor() ? cursor() : anc;
1211 void MathCursor::getSelection(MathCursorPos & i1, MathCursorPos & i2) const
1213 MathCursorPos anc = normalAnchor();
1214 if (anc < cursor()) {
1224 MathCursorPos & MathCursor::cursor()
1226 return Cursor_.back();
1230 MathCursorPos const & MathCursor::cursor() const
1232 return Cursor_.back();
1237 ////////////////////////////////////////////////////////////////////////
1240 bool operator==(MathCursorPos const & ti, MathCursorPos const & it)
1242 return ti.par_ == it.par_ && ti.idx_ == it.idx_ && ti.pos_ == it.pos_;
1246 bool operator<(MathCursorPos const & ti, MathCursorPos const & it)
1248 if (ti.par_ != it.par_) {
1249 lyxerr << "can't compare cursor and anchor in different insets\n";
1252 if (ti.idx_ != it.idx_)
1253 return ti.idx_ < it.idx_;
1254 return ti.pos_ < it.pos_;
1258 MathArray & MathCursorPos::cell(int idx) const
1260 return par_->cell(idx);
1263 MathArray & MathCursorPos::cell() const
1265 return par_->cell(idx_);
1269 MathXArray & MathCursorPos::xcell(int idx) const
1271 return par_->xcell(idx);
1275 MathXArray & MathCursorPos::xcell() const
1277 return par_->xcell(idx_);
1281 MathCursorPos MathCursor::normalAnchor() const
1283 // use Anchor on the same level as Cursor
1284 MathCursorPos normal = Anchor_[Cursor_.size() - 1];
1285 if (Cursor_.size() < Anchor_.size() && !(normal < cursor())) {
1286 // anchor is behind cursor -> move anchor behind the inset
1287 normal.cell().next(normal.pos_);
1289 //lyxerr << "normalizing: from " << Anchor_[Anchor_.size() - 1] << " to "
1290 // << normal << "\n";
1295 bool MathCursorPos::idxUp()
1297 return par_->idxUp(idx_, pos_);
1301 bool MathCursorPos::idxDown()
1303 return par_->idxDown(idx_, pos_);
1307 bool MathCursorPos::idxLeft()
1309 return par_->idxLeft(idx_, pos_);
1313 bool MathCursorPos::idxRight()
1315 return par_->idxRight(idx_, pos_);