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 "lyx_main.h"
  28 #include "BufferView.h"
  29 #include "gettext.h"
  30 #include "debug.h"
  31 #include "lyx_gui_misc.h"
  32 #include "support/LOstream.h"
  33 #include "support/lyxlib.h"
  34 #include "support/syscall.h"
  35 #include "support/lstrings.h"
  36 #include "LyXView.h"
  37 #include "Painter.h"
  38 #include "lyxrc.h"
  39 #include "math_matrixinset.h"
  40 #include "mathed/support.h"
  41
  42 using std::ostream;
  43 using std::ifstream;
  44 using std::istream;
  45 using std::pair;
  46 using std::endl;
  47 using std::vector;
  48
  49 extern char const * latex_mathenv[];
  50 extern MathCursor * mathcursor;
  51
  52
  53 // quite a hack i know. Should be done with return values...
  54 int number_of_newlines = 0;
  55
  56
  57 InsetFormula::InsetFormula()
  58         : InsetFormulaBase(new MathMatrixInset)
  59 {}
  60
  61
  62 InsetFormula::InsetFormula(MathInsetTypes t)
  63         : InsetFormulaBase(new MathMatrixInset(t))
  64 {}
  65
  66
  67 InsetFormula::InsetFormula(string const & s)
  68         : InsetFormulaBase(mathed_parse(s))
  69 {
  70         metrics();
  71 }
  72
  73
  74 Inset * InsetFormula::clone(Buffer const &, bool) const
  75 {
  76         return new InsetFormula(*this);
  77 }
  78
  79
  80 void InsetFormula::write(ostream & os) const
  81 {
  82         os << "Formula ";
  83         latex(os, false, false);
  84 }
  85
  86
  87 int InsetFormula::latex(ostream & os, bool fragile, bool) const
  88 {
  89         par()->write(os, fragile);
  90         return 1;
  91 }
  92
  93
  94 int InsetFormula::ascii(ostream & os, int) const
  95 {
  96         par()->write(os, false);
  97         return 1;
  98 }
  99
 100
 101 int InsetFormula::linuxdoc(ostream & os) const
 102 {
 103         return ascii(os, 0);
 104 }
 105
 106
 107 int InsetFormula::docBook(ostream & os) const
 108 {
 109         return ascii(os, 0);
 110 }
 111
 112
 113 void InsetFormula::read(LyXLex & lex)
 114 {
 115         par(mathed_parse(lex));
 116         metrics();
 117 }
 118
 119
 120 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 121                         int y, float & xx, bool) const
 122 {
 123         int x = int(xx) - 1;
 124         y -= 2;
 125
 126         MathInset::workwidth = bv->workWidth();
 127         Painter & pain = bv->painter();
 128
 129         metrics();
 130         int w = par()->width();
 131         int h = par()->height();
 132         int a = par()->ascent();
 133         pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 134
 135         if (mathcursor && mathcursor->formula() == this) {
 136                 mathcursor->drawSelection(pain);
 137                 pain.rectangle(x, y - a, w, h, LColor::mathframe);
 138         }
 139
 140         par()->draw(pain, x, y);
 141         xx += par()->width();
 142
 143         setCursorVisible(false);
 144 }
 145
 146
 147 void InsetFormula::metrics() const
 148 {
 149         const_cast<MathInset *>(par_)->metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 150 }
 151
 152 vector<string> const InsetFormula::getLabelList() const
 153 {
 154         return par()->getLabelList();
 155 }
 156
 157
 158 UpdatableInset::RESULT
 159 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 160          string const & arg)
 161 {
 162         RESULT result = DISPATCHED;
 163
 164         switch (action) {
 165
 166                 case LFUN_BREAKLINE:
 167                         bv->lockedInsetStoreUndo(Undo::INSERT);
 168                         int x;
 169                         int y;
 170                         mathcursor->getPos(x, y);
 171                         mathcursor->breakLine();
 172                         mathcursor->normalize();
 173                         updateLocal(bv, true);
 174                         break;
 175
 176                 case LFUN_MATH_NUMBER:
 177                 {
 178                         //lyxerr << "toggling all numbers\n";
 179                         if (display()) {
 180                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 181                                 bool old = par()->numberedType();
 182                                 for (int row = 0; row < par()->nrows(); ++row)
 183                                         par()->numbered(row, !old);
 184                                 bv->owner()->message(old ? _("No number") : _("Number"));
 185                                 updateLocal(bv, true);
 186                         }
 187                         break;
 188                 }
 189
 190                 case LFUN_MATH_NONUMBER:
 191                 {
 192                         //lyxerr << "toggling line number\n";
 193                         if (display()) {
 194                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 195                                 int row = mathcursor->row();
 196                                 bool old = par()->numbered(row);
 197                                 bv->owner()->message(old ? _("No number") : _("Number"));
 198                                 par()->numbered(row, !old);
 199                                 updateLocal(bv, true);
 200                         }
 201                         break;
 202                 }
 203
 204                 case LFUN_INSERT_LABEL:
 205                 {
 206                         bv->lockedInsetStoreUndo(Undo::INSERT);
 207
 208                         int row = mathcursor->row();
 209                         string old_label = par()->label(row);
 210                         string new_label = arg;
 211
 212                         if (new_label.empty()) {
 213                                 string const default_label =
 214                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 215                                 pair<bool, string> const res = old_label.empty()
 216                                         ? askForText(_("Enter new label to insert:"), default_label)
 217                                         : askForText(_("Enter label:"), old_label);
 218
 219                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 220                                 if (!res.first)
 221                                         break;
 222                                 new_label = frontStrip(strip(res.second));
 223                         }
 224
 225                         //if (new_label == old_label)
 226                         //      break;  // Nothing to do
 227
 228                         if (!new_label.empty()) {
 229                                 lyxerr << "setting label to '" << new_label << "'\n";
 230                                 par()->numbered(row, true);
 231                         }
 232
 233                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 234                                 bv->redraw();
 235
 236                         par()->label(row, new_label);
 237
 238                         updateLocal(bv, true);
 239                         break;
 240                 }
 241
 242                 case LFUN_MATH_EXTERN:
 243                         bv->lockedInsetStoreUndo(Undo::EDIT);
 244                         handleExtern(arg, bv);
 245                         updateLocal(bv, true);
 246                         break;
 247
 248                 case LFUN_MATH_MUTATE:
 249                 {
 250                         bv->lockedInsetStoreUndo(Undo::EDIT);
 251                         int x;
 252                         int y;
 253                         mathcursor->getPos(x, y);
 254                         par()->mutate(arg);
 255                         mathcursor->setPos(x, y);
 256                         mathcursor->normalize();
 257                         updateLocal(bv, true);
 258                         break;
 259                 }
 260
 261                 case LFUN_MATH_DISPLAY:
 262                 {
 263                         int x;
 264                         int y;
 265                         mathcursor->getPos(x, y);
 266                         if (par()->getType() == LM_OT_SIMPLE)
 267                                 par()->mutate(LM_OT_EQUATION);
 268                         else
 269                                 par()->mutate(LM_OT_SIMPLE);
 270                         mathcursor->setPos(x, y);
 271                         mathcursor->normalize();
 272                         updateLocal(bv, true);
 273                         break;
 274                 }
 275
 276                 case LFUN_PASTESELECTION:
 277                 {
 278                         string const clip = bv->getClipboard();
 279                 if (!clip.empty())
 280                                 par(mathed_parse(clip));
 281                         break;
 282                 }
 283
 284                 default:
 285                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 286         }
 287
 288         return result;
 289 }
 290
 291
 292 void InsetFormula::handleExtern(const string & arg, BufferView *)
 293 {
 294         //string outfile = lyx::tempName("maple.out");
 295         string outfile = "/tmp/lyx2" + arg + ".out";
 296         ostringstream os;
 297         par()->writeNormal(os);
 298         string code = os.str().c_str();
 299         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 300         lyxerr << "calling: " << script << endl;
 301         Systemcalls cmd(Systemcalls::System, script, 0);
 302
 303         ifstream is(outfile.c_str());
 304         par(mathed_parse(is));
 305         metrics();
 306 }
 307
 308 bool InsetFormula::display() const
 309 {
 310         return par()->getType() != LM_OT_SIMPLE;
 311 }
 312
 313
 314 MathMatrixInset * InsetFormula::par() const
 315 {
 316         return static_cast<MathMatrixInset *>(par_);
 317 }
 318
 319 void InsetFormula::par(MathInset * p)
 320 {
 321         delete par_;
 322         par_ = p ? p : new MathMatrixInset;
 323 }
 324
 325
 326 Inset::Code InsetFormula::lyxCode() const
 327 {
 328         return Inset::MATH_CODE;
 329 }
 330
 331
 332 void InsetFormula::validate(LaTeXFeatures & features) const
 333 {
 334         par()->validate(features);
 335 }
 336
 337 bool InsetFormula::insetAllowed(Inset::Code code) const
 338 {
 339         return code == Inset::LABEL_CODE;
 340 }
 341
 342
 343 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 344 {
 345         return par()->ascent() + 1;
 346 }
 347
 348
 349 int InsetFormula::descent(BufferView *, LyXFont const &) const
 350 {
 351         return par()->descent() + 1;
 352 }
 353
 354
 355 int InsetFormula::width(BufferView *, LyXFont const &) const
 356 {
 357         metrics();
 358         return par()->width();
 359 }
 360
 361
 362 MathInsetTypes InsetFormula::getType() const
 363 {
 364         return par()->getType();;
 365 }