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 #include <config.h>
  17 #include <fstream>
  18
  19 #include "support/LOstream.h"
  20
  21 #ifdef __GNUG__
  22 #pragma implementation
  23 #endif
  24
  25 #include "formula.h"
  26 #include "commandtags.h"
  27 #include "math_cursor.h"
  28 #include "math_parser.h"
  29 #include "lyx_main.h"
  30 #include "BufferView.h"
  31 #include "lyxtext.h"
  32 #include "gettext.h"
  33 #include "debug.h"
  34 #include "lyx_gui_misc.h"
  35 #include "support/LOstream.h"
  36 #include "support/lyxlib.h"
  37 #include "support/syscall.h"
  38 #include "LyXView.h"
  39 #include "Painter.h"
  40 #include "font.h"
  41 #include "lyxrc.h"
  42 #include "math_matrixinset.h"
  43 #include "mathed/support.h"
  44
  45 using std::ostringstream;
  46 using std::ostream;
  47 using std::ifstream;
  48 using std::istream;
  49 using std::pair;
  50 using std::endl;
  51 using std::vector;
  52
  53 extern char const * latex_mathenv[];
  54 extern MathCursor * mathcursor;
  55
  56
  57 // quite a hack i know. Should be done with return values...
  58 int number_of_newlines = 0;
  59
  60
  61 InsetFormula::InsetFormula()
  62         : InsetFormulaBase(new MathMatrixInset)
  63 {}
  64
  65
  66 InsetFormula::InsetFormula(MathInsetTypes t)
  67         : InsetFormulaBase(new MathMatrixInset(t))
  68 {}
  69
  70
  71 InsetFormula::InsetFormula(string const & s)
  72         : InsetFormulaBase(0)
  73 {
  74         istringstream is(s.c_str());
  75         par(mathed_parse(is));
  76 }
  77
  78
  79 Inset * InsetFormula::clone(Buffer const &, bool) const
  80 {
  81         return new InsetFormula(*this);
  82 }
  83
  84
  85 void InsetFormula::write(ostream & os) const
  86 {
  87         os << "Formula ";
  88         latex(os, false, false);
  89 }
  90
  91
  92 int InsetFormula::latex(ostream & os, bool fragile, bool) const
  93 {
  94         par()->Write(os, fragile);
  95         return 1;
  96 }
  97
  98
  99 int InsetFormula::ascii(ostream & os, int) const
 100 {
 101         par()->Write(os, false);
 102         return 1;
 103 }
 104
 105
 106 int InsetFormula::linuxdoc(ostream & os) const
 107 {
 108         return ascii(os, 0);
 109 }
 110
 111
 112 int InsetFormula::docBook(ostream & os) const
 113 {
 114         return ascii(os, 0);
 115 }
 116
 117
 118 void InsetFormula::read(LyXLex & lex)
 119 {
 120         par(mathed_parse(lex));
 121 }
 122
 123
 124 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 125                         int y, float & xx, bool) const
 126 {
 127         int x = int(xx) - 1;
 128         y -= 2;
 129         MathInset::workwidth = bv->workWidth();
 130         Painter & pain = bv->painter();
 131
 132         int w = par()->width();
 133         int h = par()->height();
 134         int a = par()->ascent();
 135         pain.fillRectangle(int(x), y - a, w, h, LColor::mathbg);
 136
 137         if (mathcursor) {
 138                 par()->Metrics(LM_ST_TEXT);
 139
 140                 if (mathcursor->formula() == this) {
 141                         if (mathcursor->Selection()) {
 142                                 int xp[10];
 143                                 int yp[10];
 144                                 int n;
 145                                 mathcursor->SelGetArea(xp, yp, n);
 146                                 pain.fillPolygon(xp, yp, n, LColor::selection);
 147                         }
 148                         pain.rectangle(int(x), y - a, w, h, LColor::mathframe);
 149                 }
 150         }
 151
 152         par()->draw(pain, int(x), y);
 153         xx += par()->width();
 154
 155         setCursorVisible(false);
 156 }
 157
 158
 159 vector<string> const InsetFormula::getLabelList() const
 160 {
 161         return par()->getLabelList();
 162 }
 163
 164
 165 UpdatableInset::RESULT
 166 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 167          string const & arg)
 168 {
 169         RESULT result = DISPATCHED;
 170
 171         switch (action) {
 172
 173                 case LFUN_BREAKLINE:
 174                         bv->lockedInsetStoreUndo(Undo::INSERT);
 175                         mathcursor->breakLine();
 176                         updateLocal(bv);
 177                         break;
 178
 179                 case LFUN_MATH_NUMBER:
 180                 {
 181                         //lyxerr << "toggling all numbers\n";
 182                         if (display()) {
 183                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 184                                 bool old = par()->numberedType();
 185                                 for (int row = 0; row < par()->nrows(); ++row)
 186                                         par()->numbered(row, !old);
 187                                 bv->owner()->message(old ? _("No number") : _("Number"));
 188                                 updateLocal(bv);
 189                         }
 190                         break;
 191                 }
 192
 193                 case LFUN_MATH_NONUMBER:
 194                 {
 195                         //lyxerr << "toggling line number\n";
 196                         if (display()) {
 197                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 198                                 int row = mathcursor->row();
 199                                 bool old = par()->numbered(row);
 200                                 bv->owner()->message(old ? _("No number") : _("Number"));
 201                                 par()->numbered(row, !old);
 202                                 updateLocal(bv);
 203                         }
 204                         break;
 205                 }
 206
 207                 case LFUN_INSERT_LABEL:
 208                 {
 209                         bv->lockedInsetStoreUndo(Undo::INSERT);
 210
 211                         int row = mathcursor->row();
 212                         string old_label = par()->label(row);
 213                         string new_label = arg;
 214
 215                         if (new_label.empty()) {
 216                                 string const default_label =
 217                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 218                                 pair<bool, string> const res = old_label.empty()
 219                                         ? askForText(_("Enter new label to insert:"), default_label)
 220                                         : askForText(_("Enter label:"), old_label);
 221
 222                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 223                                 if (!res.first)
 224                                         break;
 225                                 new_label = frontStrip(strip(res.second));
 226                         }
 227
 228                         //if (new_label == old_label)
 229                         //      break;  // Nothing to do
 230
 231                         if (!new_label.empty()) {
 232                                 lyxerr << "setting label to '" << new_label << "'\n";
 233                                 par()->numbered(row, true);
 234                         }
 235
 236                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 237                                 bv->redraw();
 238
 239                         par()->label(row, new_label);
 240
 241                         updateLocal(bv);
 242                         break;
 243                 }
 244
 245                 case LFUN_MATH_EXTERN:
 246                         bv->lockedInsetStoreUndo(Undo::EDIT);
 247                         handleExtern(arg, bv);
 248                         updateLocal(bv);
 249                         break;
 250
 251                 case LFUN_MATH_MUTATE:
 252                 {
 253                         bv->lockedInsetStoreUndo(Undo::EDIT);
 254                         int x;
 255                         int y;
 256                         mathcursor->GetPos(x, y);
 257                         par()->mutate(arg);
 258                         mathcursor->SetPos(x, y);
 259                         mathcursor->normalize();
 260                         updateLocal(bv);
 261                         break;
 262                 }
 263
 264                 case LFUN_MATH_DISPLAY:
 265                 {
 266                         int x;
 267                         int y;
 268                         mathcursor->GetPos(x, y);
 269                         if (par()->GetType() == LM_OT_SIMPLE) {
 270                                 par()->mutate(LM_OT_EQUATION);
 271                                 par()->numbered(0, false);
 272                         }
 273                         else
 274                                 par()->mutate(LM_OT_SIMPLE);
 275                         mathcursor->SetPos(x, y);
 276                         mathcursor->normalize();
 277                         updateLocal(bv);
 278                         break;
 279                 }
 280
 281                 default:
 282                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 283         }
 284
 285         return result;
 286 }
 287
 288
 289 void InsetFormula::handleExtern(const string & arg, BufferView *)
 290 {
 291         //string outfile = lyx::tempName("maple.out");
 292         string outfile = "/tmp/lyx2" + arg + ".out";
 293         ostringstream os;
 294         par()->WriteNormal(os);
 295         string code = os.str().c_str();
 296         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 297         lyxerr << "calling: " << script << endl;
 298         Systemcalls cmd(Systemcalls::System, script, 0);
 299
 300         ifstream is(outfile.c_str());
 301         par(mathed_parse(is));
 302 }
 303
 304 bool InsetFormula::display() const
 305 {
 306         return par_->GetType() != LM_OT_SIMPLE;
 307 }
 308
 309
 310 MathMatrixInset * InsetFormula::par() const
 311 {
 312         return static_cast<MathMatrixInset *>(par_);
 313 }
 314
 315 void InsetFormula::par(MathInset * p)
 316 {
 317         delete par_;
 318         par_ = p ? p : new MathMatrixInset;
 319 }
 320
 321
 322 Inset::Code InsetFormula::lyxCode() const
 323 {
 324         return Inset::MATH_CODE;
 325 }
 326
 327
 328 void InsetFormula::validate(LaTeXFeatures & features) const
 329 {
 330         par()->Validate(features);
 331 }
 332
 333
 334 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 335 {
 336         return par()->ascent() + 4;
 337 }
 338
 339
 340 int InsetFormula::descent(BufferView *, LyXFont const &) const
 341 {
 342         return par()->descent();
 343 }
 344
 345
 346 int InsetFormula::width(BufferView *, LyXFont const &) const
 347 {
 348         par()->Metrics(LM_ST_TEXT);
 349         return par()->width();
 350 }