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         Metrics();
  73 }
  74
  75
  76 Inset * InsetFormula::clone(Buffer const &, bool) const
  77 {
  78         return new InsetFormula(*this);
  79 }
  80
  81
  82 void InsetFormula::write(ostream & os) const
  83 {
  84         os << "Formula ";
  85         latex(os, false, false);
  86 }
  87
  88
  89 int InsetFormula::latex(ostream & os, bool fragile, bool) const
  90 {
  91         par()->Write(os, fragile);
  92         return 1;
  93 }
  94
  95
  96 int InsetFormula::ascii(ostream & os, int) const
  97 {
  98         par()->Write(os, false);
  99         return 1;
 100 }
 101
 102
 103 int InsetFormula::linuxdoc(ostream & os) const
 104 {
 105         return ascii(os, 0);
 106 }
 107
 108
 109 int InsetFormula::docBook(ostream & os) const
 110 {
 111         return ascii(os, 0);
 112 }
 113
 114
 115 void InsetFormula::read(LyXLex & lex)
 116 {
 117         par(mathed_parse(lex));
 118         Metrics();
 119 }
 120
 121
 122 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 123                         int y, float & xx, bool) const
 124 {
 125         int x = int(xx) - 1;
 126         y -= 2;
 127         MathInset::workwidth = bv->workWidth();
 128         Painter & pain = bv->painter();
 129
 130         int w = par()->width();
 131         int h = par()->height();
 132         int a = par()->ascent();
 133         pain.fillRectangle(int(x), y - a, w, h, LColor::mathbg);
 134
 135         if (mathcursor) {
 136                 Metrics();
 137
 138                 if (mathcursor->formula() == this) {
 139                         if (mathcursor->Selection()) {
 140                                 int xp[10];
 141                                 int yp[10];
 142                                 int n;
 143                                 mathcursor->SelGetArea(xp, yp, n);
 144                                 pain.fillPolygon(xp, yp, n, LColor::selection);
 145                         }
 146                         pain.rectangle(int(x), y - a, w, h, LColor::mathframe);
 147                 }
 148         }
 149
 150         par()->draw(pain, int(x), y);
 151         xx += par()->width();
 152
 153         setCursorVisible(false);
 154 }
 155
 156
 157 void InsetFormula::Metrics() const
 158 {
 159         const_cast<MathInset *>(par_)->Metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 160 }
 161
 162 vector<string> const InsetFormula::getLabelList() const
 163 {
 164         return par()->getLabelList();
 165 }
 166
 167
 168 UpdatableInset::RESULT
 169 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 170          string const & arg)
 171 {
 172         RESULT result = DISPATCHED;
 173
 174         switch (action) {
 175
 176                 case LFUN_BREAKLINE:
 177                         bv->lockedInsetStoreUndo(Undo::INSERT);
 178                         mathcursor->breakLine();
 179                         updateLocal(bv);
 180                         break;
 181
 182                 case LFUN_MATH_NUMBER:
 183                 {
 184                         //lyxerr << "toggling all numbers\n";
 185                         if (display()) {
 186                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 187                                 bool old = par()->numberedType();
 188                                 for (int row = 0; row < par()->nrows(); ++row)
 189                                         par()->numbered(row, !old);
 190                                 bv->owner()->message(old ? _("No number") : _("Number"));
 191                                 updateLocal(bv);
 192                         }
 193                         break;
 194                 }
 195
 196                 case LFUN_MATH_NONUMBER:
 197                 {
 198                         //lyxerr << "toggling line number\n";
 199                         if (display()) {
 200                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 201                                 int row = mathcursor->row();
 202                                 bool old = par()->numbered(row);
 203                                 bv->owner()->message(old ? _("No number") : _("Number"));
 204                                 par()->numbered(row, !old);
 205                                 updateLocal(bv);
 206                         }
 207                         break;
 208                 }
 209
 210                 case LFUN_INSERT_LABEL:
 211                 {
 212                         bv->lockedInsetStoreUndo(Undo::INSERT);
 213
 214                         int row = mathcursor->row();
 215                         string old_label = par()->label(row);
 216                         string new_label = arg;
 217
 218                         if (new_label.empty()) {
 219                                 string const default_label =
 220                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 221                                 pair<bool, string> const res = old_label.empty()
 222                                         ? askForText(_("Enter new label to insert:"), default_label)
 223                                         : askForText(_("Enter label:"), old_label);
 224
 225                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 226                                 if (!res.first)
 227                                         break;
 228                                 new_label = frontStrip(strip(res.second));
 229                         }
 230
 231                         //if (new_label == old_label)
 232                         //      break;  // Nothing to do
 233
 234                         if (!new_label.empty()) {
 235                                 lyxerr << "setting label to '" << new_label << "'\n";
 236                                 par()->numbered(row, true);
 237                         }
 238
 239                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 240                                 bv->redraw();
 241
 242                         par()->label(row, new_label);
 243
 244                         updateLocal(bv);
 245                         break;
 246                 }
 247
 248                 case LFUN_MATH_EXTERN:
 249                         bv->lockedInsetStoreUndo(Undo::EDIT);
 250                         handleExtern(arg, bv);
 251                         updateLocal(bv);
 252                         break;
 253
 254                 case LFUN_MATH_MUTATE:
 255                 {
 256                         bv->lockedInsetStoreUndo(Undo::EDIT);
 257                         int x;
 258                         int y;
 259                         mathcursor->GetPos(x, y);
 260                         par()->mutate(arg);
 261                         mathcursor->SetPos(x, y);
 262                         mathcursor->normalize();
 263                         updateLocal(bv);
 264                         break;
 265                 }
 266
 267                 case LFUN_MATH_DISPLAY:
 268                 {
 269                         int x;
 270                         int y;
 271                         mathcursor->GetPos(x, y);
 272                         if (par()->GetType() == LM_OT_SIMPLE) {
 273                                 par()->mutate(LM_OT_EQUATION);
 274                                 par()->numbered(0, false);
 275                         }
 276                         else
 277                                 par()->mutate(LM_OT_SIMPLE);
 278                         mathcursor->SetPos(x, y);
 279                         mathcursor->normalize();
 280                         updateLocal(bv);
 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
 338 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 339 {
 340         return par()->ascent();
 341 }
 342
 343
 344 int InsetFormula::descent(BufferView *, LyXFont const &) const
 345 {
 346         return par()->descent();
 347 }
 348
 349
 350 int InsetFormula::width(BufferView *, LyXFont const &) const
 351 {
 352         return par()->width();
 353 }