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                 mathcursor->drawSelection(pain);
 138                 pain.rectangle(x, y - a, w, h, LColor::mathframe);
 139         }
 140
 141         par()->draw(pain, x, y);
 142         xx += par()->width();
 143
 144         setCursorVisible(false);
 145 }
 146
 147
 148 void InsetFormula::Metrics() const
 149 {
 150         const_cast<MathInset *>(par_)->Metrics(display() ? LM_ST_DISPLAY : LM_ST_TEXT);
 151 }
 152
 153 vector<string> const InsetFormula::getLabelList() const
 154 {
 155         return par()->getLabelList();
 156 }
 157
 158
 159 UpdatableInset::RESULT
 160 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 161          string const & arg)
 162 {
 163         RESULT result = DISPATCHED;
 164
 165         switch (action) {
 166
 167                 case LFUN_BREAKLINE:
 168                         bv->lockedInsetStoreUndo(Undo::INSERT);
 169                         int x;
 170                         int y;
 171                         mathcursor->GetPos(x, y);
 172                         mathcursor->breakLine();
 173                         mathcursor->normalize();
 174                         updateLocal(bv);
 175                         break;
 176
 177                 case LFUN_MATH_NUMBER:
 178                 {
 179                         //lyxerr << "toggling all numbers\n";
 180                         if (display()) {
 181                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 182                                 bool old = par()->numberedType();
 183                                 for (int row = 0; row < par()->nrows(); ++row)
 184                                         par()->numbered(row, !old);
 185                                 bv->owner()->message(old ? _("No number") : _("Number"));
 186                                 updateLocal(bv);
 187                         }
 188                         break;
 189                 }
 190
 191                 case LFUN_MATH_NONUMBER:
 192                 {
 193                         //lyxerr << "toggling line number\n";
 194                         if (display()) {
 195                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 196                                 int row = mathcursor->row();
 197                                 bool old = par()->numbered(row);
 198                                 bv->owner()->message(old ? _("No number") : _("Number"));
 199                                 par()->numbered(row, !old);
 200                                 updateLocal(bv);
 201                         }
 202                         break;
 203                 }
 204
 205                 case LFUN_INSERT_LABEL:
 206                 {
 207                         bv->lockedInsetStoreUndo(Undo::INSERT);
 208
 209                         int row = mathcursor->row();
 210                         string old_label = par()->label(row);
 211                         string new_label = arg;
 212
 213                         if (new_label.empty()) {
 214                                 string const default_label =
 215                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 216                                 pair<bool, string> const res = old_label.empty()
 217                                         ? askForText(_("Enter new label to insert:"), default_label)
 218                                         : askForText(_("Enter label:"), old_label);
 219
 220                                 lyxerr << "res: " << res.first << " - '" << res.second << "'\n";
 221                                 if (!res.first)
 222                                         break;
 223                                 new_label = frontStrip(strip(res.second));
 224                         }
 225
 226                         //if (new_label == old_label)
 227                         //      break;  // Nothing to do
 228
 229                         if (!new_label.empty()) {
 230                                 lyxerr << "setting label to '" << new_label << "'\n";
 231                                 par()->numbered(row, true);
 232                         }
 233
 234                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 235                                 bv->redraw();
 236
 237                         par()->label(row, new_label);
 238
 239                         updateLocal(bv);
 240                         break;
 241                 }
 242
 243                 case LFUN_MATH_EXTERN:
 244                         bv->lockedInsetStoreUndo(Undo::EDIT);
 245                         handleExtern(arg, bv);
 246                         updateLocal(bv);
 247                         break;
 248
 249                 case LFUN_MATH_MUTATE:
 250                 {
 251                         bv->lockedInsetStoreUndo(Undo::EDIT);
 252                         int x;
 253                         int y;
 254                         mathcursor->GetPos(x, y);
 255                         par()->mutate(arg);
 256                         mathcursor->SetPos(x, y);
 257                         mathcursor->normalize();
 258                         updateLocal(bv);
 259                         break;
 260                 }
 261
 262                 case LFUN_MATH_DISPLAY:
 263                 {
 264                         int x;
 265                         int y;
 266                         mathcursor->GetPos(x, y);
 267                         if (par()->GetType() == LM_OT_SIMPLE)
 268                                 par()->mutate(LM_OT_EQUATION);
 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         Metrics();
 299 }
 300
 301 bool InsetFormula::display() const
 302 {
 303         return par_->GetType() != LM_OT_SIMPLE;
 304 }
 305
 306
 307 MathMatrixInset * InsetFormula::par() const
 308 {
 309         return static_cast<MathMatrixInset *>(par_);
 310 }
 311
 312 void InsetFormula::par(MathInset * p)
 313 {
 314         delete par_;
 315         par_ = p ? p : new MathMatrixInset;
 316 }
 317
 318
 319 Inset::Code InsetFormula::lyxCode() const
 320 {
 321         return Inset::MATH_CODE;
 322 }
 323
 324
 325 void InsetFormula::validate(LaTeXFeatures & features) const
 326 {
 327         par()->Validate(features);
 328 }
 329
 330
 331 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 332 {
 333         return par()->ascent() + 1;
 334 }
 335
 336
 337 int InsetFormula::descent(BufferView *, LyXFont const &) const
 338 {
 339         return par()->descent() + 1;
 340 }
 341
 342
 343 int InsetFormula::width(BufferView *, LyXFont const &) const
 344 {
 345         Metrics();
 346         return par()->width() + 2;
 347 }