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         Metrics();
 131         int w = par()->width();
 132         int h = par()->height();
 133         int a = par()->ascent();
 134         pain.fillRectangle(int(x), y - a, w, h, LColor::mathbg);
 135
 136         if (mathcursor) {
 137                 if (mathcursor->formula() == this) {
 138                         if (mathcursor->Selection()) {
 139                                 int xp[10];
 140                                 int yp[10];
 141                                 int n;
 142                                 mathcursor->SelGetArea(xp, yp, n);
 143                                 pain.fillPolygon(xp, yp, n, LColor::selection);
 144                         }
 145                         pain.rectangle(int(x), y - a, w, h, LColor::mathframe);
 146                 }
 147         }
 148
 149         par()->draw(pain, int(x), y);
 150         xx += par()->width();
 151
 152         setCursorVisible(false);
 153 }
 154
 155
 156 void InsetFormula::Metrics() const
 157 {
 158         const_cast<MathInset *>(par_)->Metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 159 }
 160
 161 vector<string> const InsetFormula::getLabelList() const
 162 {
 163         return par()->getLabelList();
 164 }
 165
 166
 167 UpdatableInset::RESULT
 168 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 169          string const & arg)
 170 {
 171         RESULT result = DISPATCHED;
 172
 173         switch (action) {
 174
 175                 case LFUN_BREAKLINE:
 176                         bv->lockedInsetStoreUndo(Undo::INSERT);
 177                         mathcursor->breakLine();
 178                         updateLocal(bv);
 179                         break;
 180
 181                 case LFUN_MATH_NUMBER:
 182                 {
 183                         //lyxerr << "toggling all numbers\n";
 184                         if (display()) {
 185                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 186                                 bool old = par()->numberedType();
 187                                 for (int row = 0; row < par()->nrows(); ++row)
 188                                         par()->numbered(row, !old);
 189                                 bv->owner()->message(old ? _("No number") : _("Number"));
 190                                 updateLocal(bv);
 191                         }
 192                         break;
 193                 }
 194
 195                 case LFUN_MATH_NONUMBER:
 196                 {
 197                         //lyxerr << "toggling line number\n";
 198                         if (display()) {
 199                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 200                                 int row = mathcursor->row();
 201                                 bool old = par()->numbered(row);
 202                                 bv->owner()->message(old ? _("No number") : _("Number"));
 203                                 par()->numbered(row, !old);
 204                                 updateLocal(bv);
 205                         }
 206                         break;
 207                 }
 208
 209                 case LFUN_INSERT_LABEL:
 210                 {
 211                         bv->lockedInsetStoreUndo(Undo::INSERT);
 212
 213                         int row = mathcursor->row();
 214                         string old_label = par()->label(row);
 215                         string new_label = arg;
 216
 217                         if (new_label.empty()) {
 218                                 string const default_label =
 219                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 220                                 pair<bool, string> const res = old_label.empty()
 221                                         ? askForText(_("Enter new label to insert:"), default_label)
 222                                         : askForText(_("Enter label:"), old_label);
 223
 224                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 225                                 if (!res.first)
 226                                         break;
 227                                 new_label = frontStrip(strip(res.second));
 228                         }
 229
 230                         //if (new_label == old_label)
 231                         //      break;  // Nothing to do
 232
 233                         if (!new_label.empty()) {
 234                                 lyxerr << "setting label to '" << new_label << "'\n";
 235                                 par()->numbered(row, true);
 236                         }
 237
 238                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 239                                 bv->redraw();
 240
 241                         par()->label(row, new_label);
 242
 243                         updateLocal(bv);
 244                         break;
 245                 }
 246
 247                 case LFUN_MATH_EXTERN:
 248                         bv->lockedInsetStoreUndo(Undo::EDIT);
 249                         handleExtern(arg, bv);
 250                         updateLocal(bv);
 251                         break;
 252
 253                 case LFUN_MATH_MUTATE:
 254                 {
 255                         bv->lockedInsetStoreUndo(Undo::EDIT);
 256                         int x;
 257                         int y;
 258                         mathcursor->GetPos(x, y);
 259                         par()->mutate(arg);
 260                         mathcursor->SetPos(x, y);
 261                         mathcursor->normalize();
 262                         updateLocal(bv);
 263                         break;
 264                 }
 265
 266                 case LFUN_MATH_DISPLAY:
 267                 {
 268                         int x;
 269                         int y;
 270                         mathcursor->GetPos(x, y);
 271                         if (par()->GetType() == LM_OT_SIMPLE) {
 272                                 par()->mutate(LM_OT_EQUATION);
 273                                 par()->numbered(0, false);
 274                         }
 275                         else
 276                                 par()->mutate(LM_OT_SIMPLE);
 277                         mathcursor->SetPos(x, y);
 278                         mathcursor->normalize();
 279                         updateLocal(bv);
 280                         break;
 281                 }
 282
 283                 default:
 284                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 285         }
 286
 287         return result;
 288 }
 289
 290
 291 void InsetFormula::handleExtern(const string & arg, BufferView *)
 292 {
 293         //string outfile = lyx::tempName("maple.out");
 294         string outfile = "/tmp/lyx2" + arg + ".out";
 295         ostringstream os;
 296         par()->WriteNormal(os);
 297         string code = os.str().c_str();
 298         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 299         lyxerr << "calling: " << script << endl;
 300         Systemcalls cmd(Systemcalls::System, script, 0);
 301
 302         ifstream is(outfile.c_str());
 303         par(mathed_parse(is));
 304         Metrics();
 305 }
 306
 307 bool InsetFormula::display() const
 308 {
 309         return par_->GetType() != LM_OT_SIMPLE;
 310 }
 311
 312
 313 MathMatrixInset * InsetFormula::par() const
 314 {
 315         return static_cast<MathMatrixInset *>(par_);
 316 }
 317
 318 void InsetFormula::par(MathInset * p)
 319 {
 320         delete par_;
 321         par_ = p ? p : new MathMatrixInset;
 322 }
 323
 324
 325 Inset::Code InsetFormula::lyxCode() const
 326 {
 327         return Inset::MATH_CODE;
 328 }
 329
 330
 331 void InsetFormula::validate(LaTeXFeatures & features) const
 332 {
 333         par()->Validate(features);
 334 }
 335
 336
 337 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 338 {
 339         return par()->ascent();
 340 }
 341
 342
 343 int InsetFormula::descent(BufferView *, LyXFont const &) const
 344 {
 345         return par()->descent();
 346 }
 347
 348
 349 int InsetFormula::width(BufferView *, LyXFont const &) const
 350 {
 351         return par()->width();
 352 }