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::ostream;
  42 using std::ifstream;
  43 using std::istream;
  44 using std::pair;
  45 using std::endl;
  46 using std::vector;
  47
  48 extern char const * latex_mathenv[];
  49 extern MathCursor * mathcursor;
  50
  51
  52 // quite a hack i know. Should be done with return values...
  53 int number_of_newlines = 0;
  54
  55
  56 InsetFormula::InsetFormula()
  57         : InsetFormulaBase(new MathMatrixInset)
  58 {}
  59
  60
  61 InsetFormula::InsetFormula(MathInsetTypes t)
  62         : InsetFormulaBase(new MathMatrixInset(t))
  63 {}
  64
  65
  66 InsetFormula::InsetFormula(string const & s)
  67         : InsetFormulaBase(0)
  68 {
  69         istringstream is(s.c_str());
  70         par(mathed_parse(is));
  71         Metrics();
  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         Metrics();
 118 }
 119
 120
 121 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 122                         int y, float & xx, bool) const
 123 {
 124         int x = int(xx) - 1;
 125         y -= 2;
 126
 127         MathInset::workwidth = bv->workWidth();
 128         Painter & pain = bv->painter();
 129
 130         Metrics();
 131         int w = par()->width();
 132         int h = par()->height();
 133         int a = par()->ascent();
 134         pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 135
 136         if (mathcursor && 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(x, y - a, w, h, LColor::mathframe);
 145         }
 146
 147         par()->draw(pain, x, y);
 148         xx += par()->width();
 149
 150         setCursorVisible(false);
 151 }
 152
 153
 154 void InsetFormula::Metrics() const
 155 {
 156         const_cast<MathInset *>(par_)->Metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 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                         else
 272                                 par()->mutate(LM_OT_SIMPLE);
 273                         mathcursor->SetPos(x, y);
 274                         mathcursor->normalize();
 275                         updateLocal(bv);
 276                         break;
 277                 }
 278
 279                 default:
 280                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 281         }
 282
 283         return result;
 284 }
 285
 286
 287 void InsetFormula::handleExtern(const string & arg, BufferView *)
 288 {
 289         //string outfile = lyx::tempName("maple.out");
 290         string outfile = "/tmp/lyx2" + arg + ".out";
 291         ostringstream os;
 292         par()->WriteNormal(os);
 293         string code = os.str().c_str();
 294         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 295         lyxerr << "calling: " << script << endl;
 296         Systemcalls cmd(Systemcalls::System, script, 0);
 297
 298         ifstream is(outfile.c_str());
 299         par(mathed_parse(is));
 300         Metrics();
 301 }
 302
 303 bool InsetFormula::display() const
 304 {
 305         return par_->GetType() != LM_OT_SIMPLE;
 306 }
 307
 308
 309 MathMatrixInset * InsetFormula::par() const
 310 {
 311         return static_cast<MathMatrixInset *>(par_);
 312 }
 313
 314 void InsetFormula::par(MathInset * p)
 315 {
 316         delete par_;
 317         par_ = p ? p : new MathMatrixInset;
 318 }
 319
 320
 321 Inset::Code InsetFormula::lyxCode() const
 322 {
 323         return Inset::MATH_CODE;
 324 }
 325
 326
 327 void InsetFormula::validate(LaTeXFeatures & features) const
 328 {
 329         par()->Validate(features);
 330 }
 331
 332
 333 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 334 {
 335         return par()->ascent();
 336 }
 337
 338
 339 int InsetFormula::descent(BufferView *, LyXFont const &) const
 340 {
 341         return par()->descent();
 342 }
 343
 344
 345 int InsetFormula::width(BufferView *, LyXFont const &) const
 346 {
 347         return par()->width();
 348 }