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
  22 #include "formula.h"
  23 #include "commandtags.h"
  24 #include "math_cursor.h"
  25 #include "math_parser.h"
  26 #include "math_charinset.h"
  27 #include "math_arrayinset.h"
  28 #include "math_deliminset.h"
  29 #include "lyx_main.h"
  30 #include "BufferView.h"
  31 #include "gettext.h"
  32 #include "debug.h"
  33 #include "frontends/Alert.h"
  34 #include "support/LOstream.h"
  35 #include "support/LAssert.h"
  36 #include "support/filetools.h" // LibFileSearch
  37 #include "frontends/LyXView.h"
  38 #include "frontends/Painter.h"
  39 #include "lyxrc.h"
  40 #include "math_hullinset.h"
  41 #include "math_support.h"
  42 #include "math_mathmlstream.h"
  43 #include "textpainter.h"
  44 #include "preview.h"
  45
  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 using std::getline;
  53
  54
  55
  56 InsetFormula::InsetFormula()
  57         : par_(MathAtom(new MathHullInset))
  58 {}
  59
  60
  61 InsetFormula::InsetFormula(MathInsetTypes t)
  62         : par_(MathAtom(new MathHullInset(t)))
  63 {}
  64
  65
  66 InsetFormula::InsetFormula(string const & s)
  67 {
  68         if (s.size()) {
  69                 bool res = mathed_parse_normal(par_, s);
  70
  71                 if (!res)
  72                         res = mathed_parse_normal(par_, "$" + s + "$");
  73
  74                 if (!res) {
  75                         lyxerr << "cannot interpret '" << s << "' as math\n";
  76                         par_ = MathAtom(new MathHullInset(LM_OT_SIMPLE));
  77                 }
  78         }
  79         metrics();
  80 }
  81
  82
  83 Inset * InsetFormula::clone(Buffer const &, bool) const
  84 {
  85         return new InsetFormula(*this);
  86 }
  87
  88
  89 void InsetFormula::write(Buffer const *, ostream & os) const
  90 {
  91         os << "Formula ";
  92         WriteStream wi(os, false, false);
  93         par_->write(wi);
  94 }
  95
  96
  97 int InsetFormula::latex(Buffer const *, ostream & os, bool fragile, bool) const
  98 {
  99         WriteStream wi(os, fragile, true);
 100         par_->write(wi);
 101         return wi.line();
 102 }
 103
 104
 105 int InsetFormula::ascii(Buffer const *, ostream & os, int) const
 106 {
 107 #if 0
 108         TextMetricsInfo mi;
 109         par()->metricsT(mi);
 110         TextPainter tpain(par()->width(), par()->height());
 111         par()->drawT(tpain, 0, par()->ascent());
 112         tpain.show(os);
 113         // reset metrics cache to "real" values
 114         metrics();
 115         return tpain.textheight();
 116 #else
 117         WriteStream wi(os, false, true);
 118         par_->write(wi);
 119         return wi.line();
 120 #endif
 121 }
 122
 123
 124 int InsetFormula::linuxdoc(Buffer const * buf, ostream & os) const
 125 {
 126         return docbook(buf, os, false);
 127 }
 128
 129
 130 int InsetFormula::docbook(Buffer const * buf, ostream & os, bool) const
 131 {
 132         MathMLStream ms(os);
 133         ms << MTag("equation");
 134         ms <<   MTag("alt");
 135         ms <<    "<[CDATA[";
 136         int res = ascii(buf, ms.os(), 0);
 137         ms <<    "]]>";
 138         ms <<   ETag("alt");
 139         ms <<   MTag("math");
 140         ms <<    par_.nucleus();
 141         ms <<   ETag("math");
 142         ms << ETag("equation");
 143         return ms.line() + res;
 144 }
 145
 146
 147 void InsetFormula::read(Buffer const *, LyXLex & lex)
 148 {
 149         mathed_parse_normal(par_, lex);
 150         metrics();
 151 }
 152
 153
 154 //ostream & operator<<(ostream & os, LyXCursor const & c)
 155 //{
 156 //      os << '[' << c.x() << ' ' << c.y() << ' ' << c.pos() << ']';
 157 //      return os;
 158 //}
 159
 160
 161 void InsetFormula::draw(BufferView * bv, LyXFont const & font,
 162                         int y, float & xx, bool) const
 163 {
 164         metrics(bv, font);
 165
 166         int x = int(xx);
 167         int w = par_->width();
 168         int h = par_->height();
 169         int a = par_->ascent();
 170
 171         MathPainterInfo pi(bv->painter());
 172         pi.base.font  = font;
 173         pi.base.font.setColor(LColor::math);
 174         pi.base.style = display() ? LM_ST_DISPLAY : LM_ST_TEXT;
 175
 176         if (lcolor.getX11Name(LColor::mathbg)!=lcolor.getX11Name(LColor::background))
 177                 pi.pain.fillRectangle(x, y - a, w, h, LColor::mathbg);
 178
 179         if (mathcursor &&
 180                         const_cast<InsetFormulaBase const *>(mathcursor->formula()) == this)
 181         {
 182                 mathcursor->drawSelection(pi);
 183                 pi.pain.rectangle(x, y - a, w, h, LColor::mathframe);
 184         }
 185
 186         par_->draw(pi, x, y);
 187
 188         // preview stuff
 189 #if 0
 190         ostringstream os;
 191         WriteStream wi(os, false, false);
 192         par_->write(wi);
 193         if (grfx::ImagePtr image = preview(os.str()))
 194                 pain.image(x, y, w, h, *image);
 195 #endif
 196
 197         xx += par_->width();
 198         xo_ = x;
 199         yo_ = y;
 200
 201         setCursorVisible(false);
 202 }
 203
 204
 205 vector<string> const InsetFormula::getLabelList() const
 206 {
 207         return hull()->getLabelList();
 208 }
 209
 210
 211 UpdatableInset::RESULT
 212 InsetFormula::localDispatch(BufferView * bv, kb_action action,
 213          string const & arg)
 214 {
 215         RESULT result = DISPATCHED;
 216
 217         switch (action) {
 218
 219                 case LFUN_BREAKLINE:
 220                         bv->lockedInsetStoreUndo(Undo::INSERT);
 221                         mathcursor->breakLine();
 222                         mathcursor->normalize();
 223                         updateLocal(bv, true);
 224                         break;
 225
 226                 case LFUN_MATH_NUMBER:
 227                 {
 228                         //lyxerr << "toggling all numbers\n";
 229                         if (display()) {
 230                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 231                                 bool old = hull()->numberedType();
 232                                 for (MathInset::row_type row = 0; row < par_->nrows(); ++row)
 233                                         hull()->numbered(row, !old);
 234                                 bv->owner()->message(old ? _("No number") : _("Number"));
 235                                 updateLocal(bv, true);
 236                         }
 237                         break;
 238                 }
 239
 240                 case LFUN_MATH_NONUMBER:
 241                 {
 242                         //lyxerr << "toggling line number\n";
 243                         if (display()) {
 244                                 bv->lockedInsetStoreUndo(Undo::INSERT);
 245                                 MathCursor::row_type row = mathcursor->hullRow();
 246                                 bool old = hull()->numbered(row);
 247                                 bv->owner()->message(old ? _("No number") : _("Number"));
 248                                 hull()->numbered(row, !old);
 249                                 updateLocal(bv, true);
 250                         }
 251                         break;
 252                 }
 253
 254                 case LFUN_INSERT_LABEL:
 255                 {
 256                         bv->lockedInsetStoreUndo(Undo::INSERT);
 257
 258                         MathCursor::row_type row = mathcursor->hullRow();
 259                         string old_label = hull()->label(row);
 260                         string new_label = arg;
 261
 262                         if (new_label.empty()) {
 263                                 string const default_label =
 264                                         (lyxrc.label_init_length >= 0) ? "eq:" : "";
 265                                 pair<bool, string> const res = old_label.empty()
 266                                         ? Alert::askForText(_("Enter new label to insert:"), default_label)
 267                                         : Alert::askForText(_("Enter label:"), old_label);
 268                                 if (!res.first)
 269                                         break;
 270                                 new_label = frontStrip(strip(res.second));
 271                         }
 272
 273                         //if (new_label == old_label)
 274                         //      break;  // Nothing to do
 275
 276                         if (!new_label.empty()) {
 277                                 lyxerr << "setting label to '" << new_label << "'\n";
 278                                 hull()->numbered(row, true);
 279                         }
 280
 281                         if (!new_label.empty() && bv->ChangeRefsIfUnique(old_label, new_label))
 282                                 bv->redraw();
 283
 284                         hull()->label(row, new_label);
 285
 286                         updateLocal(bv, true);
 287                         break;
 288                 }
 289
 290                 case LFUN_MATH_MUTATE:
 291                 {
 292                         bv->lockedInsetStoreUndo(Undo::EDIT);
 293                         int x;
 294                         int y;
 295                         mathcursor->getPos(x, y);
 296                         hull()->mutate(arg);
 297                         mathcursor->setPos(x, y);
 298                         mathcursor->normalize();
 299                         updateLocal(bv, true);
 300                         break;
 301                 }
 302
 303                 case LFUN_MATH_EXTERN:
 304                 {
 305                         bv->lockedInsetStoreUndo(Undo::EDIT);
 306                         if (mathcursor)
 307                                 mathcursor->handleExtern(arg);
 308                         // re-compute inset dimension
 309                         metrics(bv);
 310                         updateLocal(bv, true);
 311                         break;
 312                 }
 313
 314                 case LFUN_MATH_DISPLAY:
 315                 {
 316                         int x = 0;
 317                         int y = 0;
 318                         mathcursor->getPos(x, y);
 319                         if (getType() == LM_OT_SIMPLE)
 320                                 hull()->mutate(LM_OT_EQUATION);
 321                         else
 322                                 hull()->mutate(LM_OT_SIMPLE);
 323                         mathcursor->setPos(x, y);
 324                         mathcursor->normalize();
 325                         updateLocal(bv, true);
 326                         break;
 327                 }
 328
 329                 case LFUN_PASTESELECTION:
 330                 {
 331                         string const clip = bv->getClipboard();
 332                 if (!clip.empty())
 333                                 mathed_parse_normal(par_, clip);
 334                         break;
 335                 }
 336
 337                 default:
 338                         result = InsetFormulaBase::localDispatch(bv, action, arg);
 339         }
 340
 341         return result;
 342 }
 343
 344
 345 bool InsetFormula::display() const
 346 {
 347         return getType() != LM_OT_SIMPLE;
 348 }
 349
 350
 351 MathHullInset const * InsetFormula::hull() const
 352 {
 353         lyx::Assert(par_->asHullInset());
 354         return par_->asHullInset();
 355 }
 356
 357
 358 MathHullInset * InsetFormula::hull()
 359 {
 360         lyx::Assert(par_->asHullInset());
 361         return par_->asHullInset();
 362 }
 363
 364
 365 Inset::Code InsetFormula::lyxCode() const
 366 {
 367         return Inset::MATH_CODE;
 368 }
 369
 370
 371 void InsetFormula::validate(LaTeXFeatures & features) const
 372 {
 373         par_->validate(features);
 374 }
 375
 376
 377 bool InsetFormula::insetAllowed(Inset::Code code) const
 378 {
 379         return
 380                 (code == Inset::LABEL_CODE && display())
 381                 || code == Inset::ERT_CODE;
 382 }
 383
 384
 385 int InsetFormula::ascent(BufferView *, LyXFont const &) const
 386 {
 387         return par_->ascent() + 1;
 388 }
 389
 390
 391 int InsetFormula::descent(BufferView *, LyXFont const &) const
 392 {
 393         return par_->descent() + 1;
 394 }
 395
 396
 397 int InsetFormula::width(BufferView * bv, LyXFont const & font) const
 398 {
 399         metrics(bv, font);
 400         return par_->width();
 401 }
 402
 403
 404 MathInsetTypes InsetFormula::getType() const
 405 {
 406         return hull()->getType();
 407 }