src/mathed/formula.C

   1 /*
   2 *  File:        formula.C
   3 *  Purpose:     Implementation of formula inset
   4 *  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
   5 *  Created:     January 1996
   6 *  Description: Allows the edition of math paragraphs inside Lyx.
   7 *
   8 *  Copyright: 1996-1998 Alejandro Aguilar Sierra
   9 *
  10 *  Version: 0.4, Lyx project.
  11 *
  12 *   You are free to use and modify this code under the terms of
  13 *   the GNU General Public Licence version 2 or later.
  14 */
  15
  16 #ifdef __GNUG__
  17 #pragma implementation
  18 #endif
  19
  20 #include <config.h>
  21 #include <fstream>
  22
  23 #include "formula.h"
  24 #include "commandtags.h"
  25 #include "math_cursor.h"
  26 #include "math_parser.h"
  27 #include "math_charinset.h"
  28 #include "lyx_main.h"
  29 #include "BufferView.h"
  30 #include "gettext.h"
  31 #include "debug.h"
  32 #include "lyx_gui_misc.h"
  33 #include "support/LOstream.h"
  34 #include "support/LAssert.h"
  35 #include "support/lyxlib.h"
  36 #include "support/syscall.h"
  37 #include "support/lstrings.h"
  38 #include "LyXView.h"
  39 #include "Painter.h"
  40 #include "lyxrc.h"
  41 #include "math_matrixinset.h"
  42 #include "mathed/support.h"
  43
  44 using std::ostream;
  45 using std::ifstream;
  46 using std::istream;
  47 using std::pair;
  48 using std::endl;
  49 using std::vector;
  50
  51
  52 namespace {
  53
  54         void stripFromLastEqualSign(MathArray & ar)
  55         {
  56                 // find position of last '=' in the array
  57                 MathArray::size_type pos = ar.size();
  58                 for (MathArray::const_iterator it = ar.begin(); it != ar.end(); ++it)
  59                         if ((*it)->getChar() == '=')
  60                                 pos = it - ar.begin();
  61
  62                 // delete everything behind this position
  63                 ar.erase(pos, ar.size());
  64         }
  65
  66 }
  67
  68
  69 InsetFormula::InsetFormula()
  70         : par_(MathAtom(new MathMatrixInset))
  71 {}
  72
  73
  74 InsetFormula::InsetFormula(MathInsetTypes t)
  75         : par_(MathAtom(new MathMatrixInset(t)))
  76 {}
  77
  78
  79 InsetFormula::InsetFormula(string const & s)
  80 {
  81         if (s.size()) {
  82                 bool res = mathed_parse_normal(par_, s);
  83
  84                 if (!res)
  85                         res = mathed_parse_normal(par_, "$" + s + "$");
  86
  87                 if (!res) {
  88                         lyxerr << "cannot interpret '" << s << "' as math\n";
  89                         par_ = MathAtom(new MathMatrixInset(LM_OT_SIMPLE));
  90                 }
  91         }
  92         metrics();
  93 }
  94
  95
  96 Inset * InsetFormula::clone(Buffer const &, bool) const
  97 {
  98         return new InsetFormula(*this);
  99 }
 100
 101
 102 void InsetFormula::write(Buffer const * buf, ostream & os) const
 103 {
 104         os << "Formula ";
 105         latex(buf, os, false, false);
 106 }
 107
 108
 109 int InsetFormula::latex(Buffer const * buf, ostream & os, bool fragil, bool)
 110         const
 111 {
 112         MathWriteInfo wi(buf, os, fragil);
 113         par_->write(wi);
 114         return 1;
 115 }
 116
 117
 118 int InsetFormula::ascii(Buffer const * buf, ostream & os, int) const
 119 {
 120         MathWriteInfo wi(buf, os, false);
 121         par_->write(wi);
 122         return 1;
 123 }
 124
 125
 126 int InsetFormula::linuxdoc(Buffer const * buf, ostream & os) const
 127 {
 128         return ascii(buf, os, 0);
 129 }
 130
 131
 132 int InsetFormula::docbook(Buffer const * buf, ostream & os) const
 133 {
 134         return ascii(buf, os, 0);
 135 }
 136
 137
 138 void InsetFormula::read(Buffer const *, LyXLex & lex)
 139 {
 140         mathed_parse_normal(par_, lex);
 141         metrics();
 142 }
 143
 144
 145 void InsetFormula::draw(BufferView * bv, LyXFont const & font,
 146                         int y, float & xx, bool) const
 147 {
 148         int x = int(xx) - 1;
 149         y -= 2;
 150
 151         Painter & pain = bv->painter();
 152
 153         metrics(bv, font);
 154         int w = par_->width();
 155         int h = par_->height();
 156         int a = par_->ascent();
 157         pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 158
 159         if (mathcursor && mathcursor->formula() == this) {
 160                 mathcursor->drawSelection(pain);
 161                 pain.rectangle(x, y - a, w, h, LColor::mathframe);
 162         }
 163
 164         par_->draw(pain, x, y);
 165         xx += par_->width();
 166
 167         setCursorVisible(false);
 168 }
 169
 170
 171 vector<string> const InsetFormula::getLabelList() const
 172 {
 173         return mat()->getLabelList();
 174 }
 175
 176
 177 UpdatableInset::RESULT
 178 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 179          string const & arg)
 180 {
 181         RESULT result = DISPATCHED;
 182
 183         switch (action) {
 184
 185                 case LFUN_BREAKLINE:
 186                         bv->lockedInsetStoreUndo(Undo::INSERT);
 187                         mathcursor->breakLine();
 188                         mathcursor->normalize();
 189                         updateLocal(bv, true);
 190                         break;
 191
 192                 case LFUN_MATH_NUMBER:
 193                 {
 194                         //lyxerr << "toggling all numbers\n";
 195                         if (display()) {
 196                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 197                                 bool old = mat()->numberedType();
 198                                 for (MathInset::row_type row = 0; row < par_->nrows(); ++row)
 199                                         mat()->numbered(row, !old);
 200                                 bv->owner()->message(old ? _("No number") : _("Number"));
 201                                 updateLocal(bv, true);
 202                         }
 203                         break;
 204                 }
 205
 206                 case LFUN_MATH_NONUMBER:
 207                 {
 208                         //lyxerr << "toggling line number\n";
 209                         if (display()) {
 210                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 211                                 MathCursor::row_type row = mathcursor->row();
 212                                 bool old = mat()->numbered(row);
 213                                 bv->owner()->message(old ? _("No number") : _("Number"));
 214                                 mat()->numbered(row, !old);
 215                                 updateLocal(bv, true);
 216                         }
 217                         break;
 218                 }
 219
 220                 case LFUN_INSERT_LABEL:
 221                 {
 222                         bv->lockedInsetStoreUndo(Undo::INSERT);
 223
 224                         MathCursor::row_type row = mathcursor->row();
 225                         string old_label = mat()->label(row);
 226                         string new_label = arg;
 227
 228                         if (new_label.empty()) {
 229                                 string const default_label =
 230                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 231                                 pair<bool, string> const res = old_label.empty()
 232                                         ? askForText(_("Enter new label to insert:"), default_label)
 233                                         : askForText(_("Enter label:"), old_label);
 234
 235                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 236                                 if (!res.first)
 237                                         break;
 238                                 new_label = frontStrip(strip(res.second));
 239                         }
 240
 241                         //if (new_label == old_label)
 242                         //      break;  // Nothing to do
 243
 244                         if (!new_label.empty()) {
 245                                 lyxerr << "setting label to '" << new_label << "'\n";
 246                                 mat()->numbered(row, true);
 247                         }
 248
 249                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 250                                 bv->redraw();
 251
 252                         mat()->label(row, new_label);
 253
 254                         updateLocal(bv, true);
 255                         break;
 256                 }
 257
 258                 case LFUN_MATH_EXTERN:
 259                         bv->lockedInsetStoreUndo(Undo::EDIT);
 260                         handleExtern(arg);
 261                         // re-compute inset dimension
 262                         metrics(bv);
 263                         updateLocal(bv, true);
 264                         break;
 265
 266                 case LFUN_MATH_MUTATE:
 267                 {
 268                         bv->lockedInsetStoreUndo(Undo::EDIT);
 269                         int x;
 270                         int y;
 271                         mathcursor->getPos(x, y);
 272                         mat()->mutate(arg);
 273                         mathcursor->setPos(x, y);
 274                         mathcursor->normalize();
 275                         updateLocal(bv, true);
 276                         break;
 277                 }
 278
 279                 case LFUN_MATH_DISPLAY:
 280                 {
 281                         int x;
 282                         int y;
 283                         mathcursor->getPos(x, y);
 284                         if (mat()->getType() == LM_OT_SIMPLE)
 285                                 mat()->mutate(LM_OT_EQUATION);
 286                         else
 287                                 mat()->mutate(LM_OT_SIMPLE);
 288                         mathcursor->setPos(x, y);
 289                         mathcursor->normalize();
 290                         updateLocal(bv, true);
 291                         break;
 292                 }
 293
 294                 case LFUN_PASTESELECTION:
 295                 {
 296                         string const clip = bv->getClipboard();
 297                 if (!clip.empty())
 298                                 mathed_parse_normal(par_, clip);
 299                         break;
 300                 }
 301
 302                 case LFUN_MATH_COLUMN_INSERT:
 303                 {
 304                         if (mat()->getType() == LM_OT_ALIGN)
 305                                 mat()->mutate(LM_OT_ALIGNAT);
 306                         mat()->addCol(mat()->ncols());
 307                         mathcursor->normalize();
 308                         updateLocal(bv, true);
 309                 }
 310
 311                 default:
 312                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 313         }
 314
 315         return result;
 316 }
 317
 318
 319 void InsetFormula::handleExtern(const string & arg)
 320 {
 321         // where are we?
 322         if (!mathcursor)
 323                 return;
 324
 325         MathArray & ar = mathcursor->cursor().cell();
 326
 327         // parse args
 328         string lang;
 329         string extra;
 330         istringstream iss(arg.c_str());
 331         iss >> lang >> extra;
 332         if (extra.empty())
 333                 extra = "noextra";
 334
 335         // strip last '=' and everything behind
 336         stripFromLastEqualSign(ar);
 337
 338         // create normalized expression
 339         //string outfile = lyx::tempName("maple.out");
 340         string outfile = "/tmp/lyx2" + lang + ".out";
 341         ostringstream os;
 342         os << "[" << extra << ' ';
 343         ar.writeNormal(os);
 344         os << "]";
 345         string code = os.str().c_str();
 346
 347         // run external sript
 348         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 349         lyxerr << "calling: " << script << endl;
 350         Systemcalls cmd(Systemcalls::System, script, 0);
 351
 352         // append a '='
 353         ar.push_back(MathAtom(new MathCharInset('=')));
 354
 355         // append result
 356         ifstream is(outfile.c_str());
 357         mathed_parse_cell(ar, is);
 358         mathcursor->end();
 359 }
 360
 361
 362 bool InsetFormula::display() const
 363 {
 364         return mat()->getType() != LM_OT_SIMPLE;
 365 }
 366
 367
 368 MathMatrixInset const * InsetFormula::mat() const
 369 {
 370         lyx::Assert(par_->asMatrixInset());
 371         return par_->asMatrixInset();
 372 }
 373
 374
 375 MathMatrixInset * InsetFormula::mat()
 376 {
 377         lyx::Assert(par_->asMatrixInset());
 378         return par_->asMatrixInset();
 379 }
 380
 381
 382 Inset::Code InsetFormula::lyxCode() const
 383 {
 384         return Inset::MATH_CODE;
 385 }
 386
 387
 388 void InsetFormula::validate(LaTeXFeatures & features) const
 389 {
 390         par_->validate(features);
 391 }
 392
 393
 394 bool InsetFormula::insetAllowed(Inset::Code code) const
 395 {
 396         return code == Inset::LABEL_CODE && display();
 397 }
 398
 399
 400 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 401 {
 402         return par_->ascent() + 2;
 403 }
 404
 405
 406 int InsetFormula::descent(BufferView *, LyXFont const &) const
 407 {
 408         return par_->descent() - 2;
 409 }
 410
 411
 412 int InsetFormula::width(BufferView * bv, LyXFont const & font) const
 413 {
 414         metrics(bv, font);
 415         return par_->width();
 416 }
 417
 418
 419 MathInsetTypes InsetFormula::getType() const
 420 {
 421         return mat()->getType();
 422 }