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 #include <config.h>
  17 #include <fstream>
  18
  19 #include "support/LOstream.h"
  20
  21 #ifdef __GNUG__
  22 #pragma implementation
  23 #endif
  24
  25 #include "formula.h"
  26 #include "commandtags.h"
  27 #include "math_cursor.h"
  28 #include "math_parser.h"
  29 #include "lyx_main.h"
  30 #include "BufferView.h"
  31 #include "lyxtext.h"
  32 #include "gettext.h"
  33 #include "debug.h"
  34 #include "lyx_gui_misc.h"
  35 #include "support/LOstream.h"
  36 #include "support/lyxlib.h"
  37 #include "support/syscall.h"
  38 #include "LyXView.h"
  39 #include "Painter.h"
  40 #include "font.h"
  41 #include "lyxrc.h"
  42 #include "math_matrixinset.h"
  43 #include "mathed/support.h"
  44
  45 using std::ostringstream;
  46 using std::ostream;
  47 using std::ifstream;
  48 using std::istream;
  49 using std::pair;
  50 using std::endl;
  51 using std::vector;
  52
  53 extern char const * latex_mathenv[];
  54 extern MathCursor * mathcursor;
  55 extern LyXFont WhichFont(short type, int size);
  56
  57
  58
  59 // quite a hack i know. Should be done with return values...
  60 int number_of_newlines = 0;
  61
  62
  63 InsetFormula::InsetFormula()
  64         : InsetFormulaBase(new MathMatrixInset)
  65 {}
  66
  67
  68 InsetFormula::InsetFormula(MathInsetTypes t)
  69         : InsetFormulaBase(new MathMatrixInset(t))
  70 {}
  71
  72
  73
  74 Inset * InsetFormula::clone(Buffer const &) const
  75 {
  76         return new InsetFormula(*this);
  77 }
  78
  79
  80 void InsetFormula::write(Buffer const * buf, ostream & os) const
  81 {
  82         os << "Formula ";
  83         latex(buf, os, false, false);
  84 }
  85
  86
  87 int InsetFormula::latex(Buffer const *, ostream & os, bool fragile, bool) const
  88 {
  89         par()->Write(os, fragile);
  90         return 1;
  91 }
  92
  93
  94 int InsetFormula::ascii(Buffer const *, ostream & os, int) const
  95 {
  96         par()->Write(os, false);
  97         return 1;
  98 }
  99
 100
 101 int InsetFormula::linuxdoc(Buffer const * buf, ostream & os) const
 102 {
 103         return ascii(buf, os, 0);
 104 }
 105
 106
 107 int InsetFormula::docBook(Buffer const * buf, ostream & os) const
 108 {
 109         return ascii(buf, os, 0);
 110 }
 111
 112
 113 void InsetFormula::read(Buffer const *, LyXLex & lex)
 114 {
 115         par_ = mathed_parse(lex);
 116 }
 117
 118
 119 void InsetFormula::draw(BufferView * bv, LyXFont const &,
 120                         int y, float & xx, bool) const
 121 {
 122         int x = int(xx) - 1;
 123         y -= 2;
 124         MathInset::workwidth = bv->workWidth();
 125         Painter & pain = bv->painter();
 126
 127         int w = par()->width();
 128         int h = par()->height();
 129         int a = par()->ascent();
 130         pain.fillRectangle(int(x), y - a, w, h, LColor::mathbg);
 131
 132         if (mathcursor) {
 133                 par()->Metrics(LM_ST_TEXT);
 134
 135                 if (mathcursor->formula() == this) {
 136                         if (mathcursor->Selection()) {
 137                                 int xp[10];
 138                                 int yp[10];
 139                                 int n;
 140                                 mathcursor->SelGetArea(xp, yp, n);
 141                                 pain.fillPolygon(xp, yp, n, LColor::selection);
 142                         }
 143                         pain.rectangle(int(x), y - a, w, h, LColor::mathframe);
 144                 }
 145         }
 146
 147         par()->draw(pain, int(x), y);
 148         xx += par()->width();
 149
 150         setCursorVisible(false);
 151 }
 152
 153
 154 vector<string> const InsetFormula::getLabelList() const
 155 {
 156         return par()->getLabelList();
 157 }
 158
 159
 160 UpdatableInset::RESULT
 161 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 162          string const & arg)
 163 {
 164         RESULT result = DISPATCHED;
 165
 166         switch (action) {
 167
 168                 case LFUN_BREAKLINE:
 169                         bv->lockedInsetStoreUndo(Undo::INSERT);
 170                         par()->breakLine();
 171                         updateLocal(bv);
 172                         break;
 173
 174
 175                 case LFUN_DELETE_LINE_FORWARD:
 176                         bv->lockedInsetStoreUndo(Undo::DELETE);
 177                         mathcursor->DelLine();
 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                         handleExtern(arg, bv);
 249                         updateLocal(bv);
 250                         break;
 251
 252                 case LFUN_MATH_MUTATE:
 253                         par()->mutate(arg);
 254                         updateLocal(bv);
 255                         break;
 256
 257                 case LFUN_TABINSERT:
 258                         lyxerr << "take index from cursor\n";
 259                         par()->splitCell(0);
 260                         updateLocal(bv);
 261                         break;
 262
 263                 case LFUN_MATH_DISPLAY:
 264                         if (par()->GetType() == LM_OT_SIMPLE)
 265                                 par()->mutate(LM_OT_EQUATION);
 266                         else
 267                                 par()->mutate(LM_OT_SIMPLE);
 268                         updateLocal(bv);
 269                         break;
 270
 271                 default:
 272                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 273         }
 274
 275         return result;
 276 }
 277
 278
 279 void InsetFormula::handleExtern(const string & arg, BufferView *)
 280 {
 281         //string outfile = lyx::tempName("maple.out");
 282         string outfile = "/tmp/lyx2" + arg + ".out";
 283         ostringstream os;
 284         par()->WriteNormal(os);
 285         string code = os.str().c_str();
 286         string script = "lyx2" + arg + " '" + code + "' " + outfile;
 287         lyxerr << "calling: " << script << endl;
 288         Systemcalls cmd(Systemcalls::System, script, 0);
 289
 290         ifstream is(outfile.c_str());
 291         par_ = mathed_parse(is);
 292 }
 293
 294 bool InsetFormula::display() const
 295 {
 296         return par_->GetType() != LM_OT_SIMPLE;
 297 }
 298
 299
 300 MathMatrixInset * InsetFormula::par() const
 301 {
 302         return static_cast<MathMatrixInset *>(par_);
 303 }
 304
 305
 306 Inset::Code InsetFormula::lyxCode() const
 307 {
 308         return Inset::MATH_CODE;
 309 }
 310
 311
 312 void InsetFormula::validate(LaTeXFeatures & features) const
 313 {
 314         par()->Validate(features);
 315 }
 316
 317
 318 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 319 {
 320         return par()->ascent() + 4;
 321 }
 322
 323
 324 int InsetFormula::descent(BufferView *, LyXFont const &) const
 325 {
 326         return par()->descent();
 327 }
 328
 329
 330 int InsetFormula::width(BufferView *, LyXFont const &) const
 331 {
 332         par()->Metrics(LM_ST_TEXT);
 333         return par()->width();
 334 }
 335
 336 /*
 337 LyXFont const InsetFormula::ConvertFont(LyXFont const & f) const
 338 {
 339         // We have already discussed what was here
 340         LyXFont font(f);
 341         font.setLatex(LyXFont::OFF);
 342         return font;
 343 }
 344 */