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
  50 InsetFormula::InsetFormula()
  51         : par_(new MathMatrixInset)
  52 {}
  53
  54
  55 InsetFormula::InsetFormula(const InsetFormula & f)
  56         : InsetFormulaBase(f), par_(static_cast<MathMatrixInset *>(f.par_->clone()))
  57 {}
  58
  59
  60 InsetFormula::InsetFormula(MathInsetTypes t)
  61         : par_(new MathMatrixInset(t))
  62 {}
  63
  64
  65 InsetFormula::InsetFormula(string const & s)
  66         : par_(mathed_parse_normal(s))
  67 {
  68         if (!par_)
  69                 par_ = mathed_parse_normal("$" + s + "$");
  70
  71         if (!par_) {
  72                 lyxerr << "cannot interpret '" << s << "' as math\n";
  73                 par_ = new MathMatrixInset(LM_OT_SIMPLE);
  74         }
  75         metrics();
  76 }
  77
  78
  79 InsetFormula::~InsetFormula()
  80 {
  81         delete par_;
  82 }
  83
  84
  85 Inset * InsetFormula::clone(Buffer const &, bool) const
  86 {
  87         return new InsetFormula(*this);
  88 }
  89
  90
  91 void InsetFormula::write(ostream & os) const
  92 {
  93         os << "Formula ";
  94         latex(os, false, false);
  95 }
  96
  97
  98 int InsetFormula::latex(ostream & os, bool fragile, bool) const
  99 {
 100         par_->write(os, fragile);
 101         return 1;
 102 }
 103
 104
 105 int InsetFormula::ascii(ostream & os, int) const
 106 {
 107         par_->write(os, false);
 108         return 1;
 109 }
 110
 111
 112 int InsetFormula::linuxdoc(ostream & os) const
 113 {
 114         return ascii(os, 0);
 115 }
 116
 117
 118 int InsetFormula::docBook(ostream & os) const
 119 {
 120         return ascii(os, 0);
 121 }
 122
 123
 124 void InsetFormula::read(LyXLex & lex)
 125 {
 126         par(mathed_parse_normal(lex));
 127         metrics();
 128 }
 129
 130
 131 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 132                         int y, float & xx, bool) const
 133 {
 134         int x = int(xx) - 1;
 135         y -= 2;
 136
 137         MathInset::workwidth = bv->workWidth();
 138         Painter & pain = bv->painter();
 139
 140         metrics();
 141         int w = par_->width();
 142         int h = par_->height();
 143         int a = par_->ascent();
 144         pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 145
 146         if (mathcursor && mathcursor->formula() == this) {
 147                 mathcursor->drawSelection(pain);
 148                 pain.rectangle(x, y - a, w, h, LColor::mathframe);
 149         }
 150
 151         par_->draw(pain, x, y);
 152         xx += par_->width();
 153
 154         setCursorVisible(false);
 155 }
 156
 157
 158 void InsetFormula::metrics() const
 159 {
 160         par_->metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 161 }
 162
 163 vector<string> const InsetFormula::getLabelList() const
 164 {
 165         return par_->getLabelList();
 166 }
 167
 168
 169 UpdatableInset::RESULT
 170 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 171          string const & arg)
 172 {
 173         RESULT result = DISPATCHED;
 174
 175         switch (action) {
 176
 177                 case LFUN_BREAKLINE:
 178                         bv->lockedInsetStoreUndo(Undo::INSERT);
 179                         mathcursor->breakLine();
 180                         mathcursor->normalize();
 181                         updateLocal(bv, true);
 182                         break;
 183
 184                 case LFUN_MATH_NUMBER:
 185                 {
 186                         //lyxerr << "toggling all numbers\n";
 187                         if (display()) {
 188                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 189                                 bool old = par_->numberedType();
 190                                 for (int row = 0; row < par_->nrows(); ++row)
 191                                         par_->numbered(row, !old);
 192                                 bv->owner()->message(old ? _("No number") : _("Number"));
 193                                 updateLocal(bv, true);
 194                         }
 195                         break;
 196                 }
 197
 198                 case LFUN_MATH_NONUMBER:
 199                 {
 200                         //lyxerr << "toggling line number\n";
 201                         if (display()) {
 202                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 203                                 int row = mathcursor->row();
 204                                 bool old = par_->numbered(row);
 205                                 bv->owner()->message(old ? _("No number") : _("Number"));
 206                                 par_->numbered(row, !old);
 207                                 updateLocal(bv, true);
 208                         }
 209                         break;
 210                 }
 211
 212                 case LFUN_INSERT_LABEL:
 213                 {
 214                         bv->lockedInsetStoreUndo(Undo::INSERT);
 215
 216                         int row = mathcursor->row();
 217                         string old_label = par_->label(row);
 218                         string new_label = arg;
 219
 220                         if (new_label.empty()) {
 221                                 string const default_label =
 222                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 223                                 pair<bool, string> const res = old_label.empty()
 224                                         ? askForText(_("Enter new label to insert:"), default_label)
 225                                         : askForText(_("Enter label:"), old_label);
 226
 227                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 228                                 if (!res.first)
 229                                         break;
 230                                 new_label = frontStrip(strip(res.second));
 231                         }
 232
 233                         //if (new_label == old_label)
 234                         //      break;  // Nothing to do
 235
 236                         if (!new_label.empty()) {
 237                                 lyxerr << "setting label to '" << new_label << "'\n";
 238                                 par_->numbered(row, true);
 239                         }
 240
 241                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 242                                 bv->redraw();
 243
 244                         par_->label(row, new_label);
 245
 246                         updateLocal(bv, true);
 247                         break;
 248                 }
 249
 250                 case LFUN_MATH_EXTERN:
 251                         bv->lockedInsetStoreUndo(Undo::EDIT);
 252                         handleExtern(arg, bv);
 253                         updateLocal(bv, true);
 254                         break;
 255
 256                 case LFUN_MATH_MUTATE:
 257                 {
 258                         bv->lockedInsetStoreUndo(Undo::EDIT);
 259                         int x;
 260                         int y;
 261                         mathcursor->getPos(x, y);
 262                         par_->mutate(arg);
 263                         mathcursor->setPos(x, y);
 264                         mathcursor->normalize();
 265                         updateLocal(bv, true);
 266                         break;
 267                 }
 268
 269                 case LFUN_MATH_DISPLAY:
 270                 {
 271                         int x;
 272                         int y;
 273                         mathcursor->getPos(x, y);
 274                         if (par_->getType() == LM_OT_SIMPLE)
 275                                 par_->mutate(LM_OT_EQUATION);
 276                         else
 277                                 par_->mutate(LM_OT_SIMPLE);
 278                         mathcursor->setPos(x, y);
 279                         mathcursor->normalize();
 280                         updateLocal(bv, true);
 281                         break;
 282                 }
 283
 284                 case LFUN_PASTESELECTION:
 285                 {
 286                         string const clip = bv->getClipboard();
 287                 if (!clip.empty())
 288                                 par(mathed_parse_normal(clip));
 289                         break;
 290                 }
 291
 292                 default:
 293                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 294         }
 295
 296         return result;
 297 }
 298
 299
 300 void InsetFormula::handleExtern(const string & arg, BufferView *)
 301 {
 302         //string outfile = lyx::tempName("maple.out");
 303         string outfile = "/tmp/lyx2" + arg + ".out";
 304         ostringstream os;
 305         par_->writeNormal(os);
 306         string code = os.str().c_str();
 307         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 308         lyxerr << "calling: " << script << endl;
 309         Systemcalls cmd(Systemcalls::System, script, 0);
 310
 311         ifstream is(outfile.c_str());
 312         par(mathed_parse_normal(is));
 313         metrics();
 314 }
 315
 316 bool InsetFormula::display() const
 317 {
 318         return par_->getType() != LM_OT_SIMPLE;
 319 }
 320
 321
 322 MathInset const * InsetFormula::par() const
 323 {
 324         return par_;
 325 }
 326
 327
 328 void InsetFormula::par(MathMatrixInset * p)
 329 {
 330         delete par_;
 331         par_ = p ? static_cast<MathMatrixInset *>(p) : new MathMatrixInset;
 332 }
 333
 334
 335 Inset::Code InsetFormula::lyxCode() const
 336 {
 337         return Inset::MATH_CODE;
 338 }
 339
 340
 341 void InsetFormula::validate(LaTeXFeatures & features) const
 342 {
 343         par_->validate(features);
 344 }
 345
 346 bool InsetFormula::insetAllowed(Inset::Code code) const
 347 {
 348         return code == Inset::LABEL_CODE;
 349 }
 350
 351
 352 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 353 {
 354         return par_->ascent() + 1;
 355 }
 356
 357
 358 int InsetFormula::descent(BufferView *, LyXFont const &) const
 359 {
 360         return par_->descent() + 1;
 361 }
 362
 363
 364 int InsetFormula::width(BufferView *, LyXFont const &) const
 365 {
 366         metrics();
 367         return par_->width();
 368 }
 369
 370
 371 MathInsetTypes InsetFormula::getType() const
 372 {
 373         return par_->getType();;
 374 }