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 "LyXView.h"
  36 #include "Painter.h"
  37 #include "lyxrc.h"
  38 #include "math_matrixinset.h"
  39 #include "mathed/support.h"
  40
  41 using std::ostringstream;
  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(0)
  69 {
  70         istringstream is(s.c_str());
  71         par(mathed_parse(is));
  72 }
  73
  74
  75 Inset * InsetFormula::clone(Buffer const &, bool) const
  76 {
  77         return new InsetFormula(*this);
  78 }
  79
  80
  81 void InsetFormula::write(ostream & os) const
  82 {
  83         os << "Formula ";
  84         latex(os, false, false);
  85 }
  86
  87
  88 int InsetFormula::latex(ostream & os, bool fragile, bool) const
  89 {
  90         par()->Write(os, fragile);
  91         return 1;
  92 }
  93
  94
  95 int InsetFormula::ascii(ostream & os, int) const
  96 {
  97         par()->Write(os, false);
  98         return 1;
  99 }
 100
 101
 102 int InsetFormula::linuxdoc(ostream & os) const
 103 {
 104         return ascii(os, 0);
 105 }
 106
 107
 108 int InsetFormula::docBook(ostream & os) const
 109 {
 110         return ascii(os, 0);
 111 }
 112
 113
 114 void InsetFormula::read(LyXLex & lex)
 115 {
 116         par(mathed_parse(lex));
 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         MathInset::workwidth = bv->workWidth();
 126         Painter & pain = bv->painter();
 127
 128         int w = par()->width();
 129         int h = par()->height();
 130         int a = par()->ascent();
 131         pain.fillRectangle(int(x), y - a, w, h, LColor::mathbg);
 132
 133         if (mathcursor) {
 134                 par()->Metrics(LM_ST_TEXT);
 135
 136                 if (mathcursor->formula() == this) {
 137                         if (mathcursor->Selection()) {
 138                                 int xp[10];
 139                                 int yp[10];
 140                                 int n;
 141                                 mathcursor->SelGetArea(xp, yp, n);
 142                                 pain.fillPolygon(xp, yp, n, LColor::selection);
 143                         }
 144                         pain.rectangle(int(x), y - a, w, h, LColor::mathframe);
 145                 }
 146         }
 147
 148         par()->draw(pain, int(x), y);
 149         xx += par()->width();
 150
 151         setCursorVisible(false);
 152 }
 153
 154
 155 vector<string> const InsetFormula::getLabelList() const
 156 {
 157         return par()->getLabelList();
 158 }
 159
 160
 161 UpdatableInset::RESULT
 162 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 163          string const & arg)
 164 {
 165         RESULT result = DISPATCHED;
 166
 167         switch (action) {
 168
 169                 case LFUN_BREAKLINE:
 170                         bv->lockedInsetStoreUndo(Undo::INSERT);
 171                         mathcursor->breakLine();
 172                         updateLocal(bv);
 173                         break;
 174
 175                 case LFUN_MATH_NUMBER:
 176                 {
 177                         //lyxerr << "toggling all numbers\n";
 178                         if (display()) {
 179                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 180                                 bool old = par()->numberedType();
 181                                 for (int row = 0; row < par()->nrows(); ++row)
 182                                         par()->numbered(row, !old);
 183                                 bv->owner()->message(old ? _("No number") : _("Number"));
 184                                 updateLocal(bv);
 185                         }
 186                         break;
 187                 }
 188
 189                 case LFUN_MATH_NONUMBER:
 190                 {
 191                         //lyxerr << "toggling line number\n";
 192                         if (display()) {
 193                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 194                                 int row = mathcursor->row();
 195                                 bool old = par()->numbered(row);
 196                                 bv->owner()->message(old ? _("No number") : _("Number"));
 197                                 par()->numbered(row, !old);
 198                                 updateLocal(bv);
 199                         }
 200                         break;
 201                 }
 202
 203                 case LFUN_INSERT_LABEL:
 204                 {
 205                         bv->lockedInsetStoreUndo(Undo::INSERT);
 206
 207                         int row = mathcursor->row();
 208                         string old_label = par()->label(row);
 209                         string new_label = arg;
 210
 211                         if (new_label.empty()) {
 212                                 string const default_label =
 213                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 214                                 pair<bool, string> const res = old_label.empty()
 215                                         ? askForText(_("Enter new label to insert:"), default_label)
 216                                         : askForText(_("Enter label:"), old_label);
 217
 218                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 219                                 if (!res.first)
 220                                         break;
 221                                 new_label = frontStrip(strip(res.second));
 222                         }
 223
 224                         //if (new_label == old_label)
 225                         //      break;  // Nothing to do
 226
 227                         if (!new_label.empty()) {
 228                                 lyxerr << "setting label to '" << new_label << "'\n";
 229                                 par()->numbered(row, true);
 230                         }
 231
 232                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 233                                 bv->redraw();
 234
 235                         par()->label(row, new_label);
 236
 237                         updateLocal(bv);
 238                         break;
 239                 }
 240
 241                 case LFUN_MATH_EXTERN:
 242                         bv->lockedInsetStoreUndo(Undo::EDIT);
 243                         handleExtern(arg, bv);
 244                         updateLocal(bv);
 245                         break;
 246
 247                 case LFUN_MATH_MUTATE:
 248                 {
 249                         bv->lockedInsetStoreUndo(Undo::EDIT);
 250                         int x;
 251                         int y;
 252                         mathcursor->GetPos(x, y);
 253                         par()->mutate(arg);
 254                         mathcursor->SetPos(x, y);
 255                         mathcursor->normalize();
 256                         updateLocal(bv);
 257                         break;
 258                 }
 259
 260                 case LFUN_MATH_DISPLAY:
 261                 {
 262                         int x;
 263                         int y;
 264                         mathcursor->GetPos(x, y);
 265                         if (par()->GetType() == LM_OT_SIMPLE) {
 266                                 par()->mutate(LM_OT_EQUATION);
 267                                 par()->numbered(0, false);
 268                         }
 269                         else
 270                                 par()->mutate(LM_OT_SIMPLE);
 271                         mathcursor->SetPos(x, y);
 272                         mathcursor->normalize();
 273                         updateLocal(bv);
 274                         break;
 275                 }
 276
 277                 default:
 278                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 279         }
 280
 281         return result;
 282 }
 283
 284
 285 void InsetFormula::handleExtern(const string & arg, BufferView *)
 286 {
 287         //string outfile = lyx::tempName("maple.out");
 288         string outfile = "/tmp/lyx2" + arg + ".out";
 289         ostringstream os;
 290         par()->WriteNormal(os);
 291         string code = os.str().c_str();
 292         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 293         lyxerr << "calling: " << script << endl;
 294         Systemcalls cmd(Systemcalls::System, script, 0);
 295
 296         ifstream is(outfile.c_str());
 297         par(mathed_parse(is));
 298 }
 299
 300 bool InsetFormula::display() const
 301 {
 302         return par_->GetType() != LM_OT_SIMPLE;
 303 }
 304
 305
 306 MathMatrixInset * InsetFormula::par() const
 307 {
 308         return static_cast<MathMatrixInset *>(par_);
 309 }
 310
 311 void InsetFormula::par(MathInset * p)
 312 {
 313         delete par_;
 314         par_ = p ? p : new MathMatrixInset;
 315 }
 316
 317
 318 Inset::Code InsetFormula::lyxCode() const
 319 {
 320         return Inset::MATH_CODE;
 321 }
 322
 323
 324 void InsetFormula::validate(LaTeXFeatures & features) const
 325 {
 326         par()->Validate(features);
 327 }
 328
 329
 330 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 331 {
 332         return par()->ascent() + 4;
 333 }
 334
 335
 336 int InsetFormula::descent(BufferView *, LyXFont const &) const
 337 {
 338         return par()->descent();
 339 }
 340
 341
 342 int InsetFormula::width(BufferView *, LyXFont const &) const
 343 {
 344         par()->Metrics(LM_ST_TEXT);
 345         return par()->width();
 346 }