src/mathed/MathData.cpp

   1 /**
   2  * \file MathData.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author André Pönitz
   7  * \author Stefan Schimanski
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "MathData.h"
  15
  16 #include "InsetMathBrace.h"
  17 #include "InsetMathFont.h"
  18 #include "InsetMathScript.h"
  19 #include "MacroTable.h"
  20 #include "MathMacro.h"
  21 #include "MathStream.h"
  22 #include "MathSupport.h"
  23 #include "MetricsInfo.h"
  24 #include "ReplaceData.h"
  25
  26 #include "Buffer.h"
  27 #include "BufferView.h"
  28 #include "CoordCache.h"
  29 #include "Cursor.h"
  30
  31 #include "mathed/InsetMathUnknown.h"
  32
  33 #include "support/debug.h"
  34 #include "support/docstream.h"
  35
  36 #include "frontends/FontMetrics.h"
  37 #include "frontends/Painter.h"
  38
  39 #include "support/lassert.h"
  40 #include <boost/next_prior.hpp>
  41
  42 #include <cstdlib>
  43
  44 using namespace std;
  45
  46 namespace lyx {
  47
  48
  49 MathData::MathData(Buffer * buf, const_iterator from, const_iterator to)
  50         : base_type(from, to), buffer_(buf)
  51 {}
  52
  53
  54 MathAtom & MathData::operator[](pos_type pos)
  55 {
  56         LASSERT(pos < size(), /**/);
  57         return base_type::operator[](pos);
  58 }
  59
  60
  61 MathAtom const & MathData::operator[](pos_type pos) const
  62 {
  63         LASSERT(pos < size(), /**/);
  64         return base_type::operator[](pos);
  65 }
  66
  67
  68 void MathData::insert(size_type pos, MathAtom const & t)
  69 {
  70         base_type::insert(begin() + pos, t);
  71 }
  72
  73
  74 void MathData::insert(size_type pos, MathData const & ar)
  75 {
  76         LASSERT(pos <= size(), /**/);
  77         base_type::insert(begin() + pos, ar.begin(), ar.end());
  78 }
  79
  80
  81 void MathData::append(MathData const & ar)
  82 {
  83         insert(size(), ar);
  84 }
  85
  86
  87 void MathData::erase(size_type pos)
  88 {
  89         if (pos < size())
  90                 erase(pos, pos + 1);
  91 }
  92
  93
  94 void MathData::erase(iterator pos1, iterator pos2)
  95 {
  96         base_type::erase(pos1, pos2);
  97 }
  98
  99
 100 void MathData::erase(iterator pos)
 101 {
 102         base_type::erase(pos);
 103 }
 104
 105
 106 void MathData::erase(size_type pos1, size_type pos2)
 107 {
 108         base_type::erase(begin() + pos1, begin() + pos2);
 109 }
 110
 111
 112 void MathData::dump2() const
 113 {
 114         odocstringstream os;
 115         NormalStream ns(os);
 116         for (const_iterator it = begin(); it != end(); ++it)
 117                 ns << *it << ' ';
 118         lyxerr << to_utf8(os.str());
 119 }
 120
 121
 122 void MathData::dump() const
 123 {
 124         odocstringstream os;
 125         NormalStream ns(os);
 126         for (const_iterator it = begin(); it != end(); ++it)
 127                 ns << '<' << *it << '>';
 128         lyxerr << to_utf8(os.str());
 129 }
 130
 131
 132 void MathData::validate(LaTeXFeatures & features) const
 133 {
 134         for (const_iterator it = begin(); it != end(); ++it)
 135                 (*it)->validate(features);
 136 }
 137
 138
 139 bool MathData::match(MathData const & ar) const
 140 {
 141         return size() == ar.size() && matchpart(ar, 0);
 142 }
 143
 144
 145 bool MathData::matchpart(MathData const & ar, pos_type pos) const
 146 {
 147         if (size() < ar.size() + pos)
 148                 return false;
 149         const_iterator it = begin() + pos;
 150         for (const_iterator jt = ar.begin(); jt != ar.end(); ++jt, ++it)
 151                 if (asString(*it) != asString(*jt))
 152                         return false;
 153         return true;
 154 }
 155
 156
 157 void MathData::replace(ReplaceData & rep)
 158 {
 159         for (size_type i = 0; i < size(); ++i) {
 160                 if (find1(rep.from, i)) {
 161                         // match found
 162                         lyxerr << "match found!" << endl;
 163                         erase(i, i + rep.from.size());
 164                         insert(i, rep.to);
 165                 }
 166         }
 167
 168         // FIXME: temporarily disabled
 169         // for (const_iterator it = begin(); it != end(); ++it)
 170         //      it->nucleus()->replace(rep);
 171 }
 172
 173
 174 bool MathData::find1(MathData const & ar, size_type pos) const
 175 {
 176         lyxerr << "finding '" << ar << "' in '" << *this << "'" << endl;
 177         for (size_type i = 0, n = ar.size(); i < n; ++i)
 178                 if (asString(operator[](pos + i)) != asString(ar[i]))
 179                         return false;
 180         return true;
 181 }
 182
 183
 184 MathData::size_type MathData::find(MathData const & ar) const
 185 {
 186         for (int i = 0, last = size() - ar.size(); i < last; ++i)
 187                 if (find1(ar, i))
 188                         return i;
 189         return size();
 190 }
 191
 192
 193 MathData::size_type MathData::find_last(MathData const & ar) const
 194 {
 195         for (int i = size() - ar.size(); i >= 0; --i)
 196                 if (find1(ar, i))
 197                         return i;
 198         return size();
 199 }
 200
 201
 202 bool MathData::contains(MathData const & ar) const
 203 {
 204         if (find(ar) != size())
 205                 return true;
 206         for (const_iterator it = begin(); it != end(); ++it)
 207                 if ((*it)->contains(ar))
 208                         return true;
 209         return false;
 210 }
 211
 212
 213 void MathData::touch() const
 214 {
 215 }
 216
 217
 218 namespace {
 219
 220 bool isInside(DocIterator const & it, MathData const & ar,
 221         pos_type p1, pos_type p2)
 222 {
 223         for (size_t i = 0; i != it.depth(); ++i) {
 224                 CursorSlice const & sl = it[i];
 225                 if (sl.inset().inMathed() && &sl.cell() == &ar)
 226                         return p1 <= sl.pos() && sl.pos() < p2;
 227         }
 228         return false;
 229 }
 230
 231 }
 232
 233
 234
 235 void MathData::metrics(MetricsInfo & mi, Dimension & dim) const
 236 {
 237         frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
 238         dim = fm.dimension('I');
 239         int xascent = fm.dimension('x').ascent();
 240         if (xascent >= dim.asc)
 241                 xascent = (2 * dim.asc) / 3;
 242         minasc_ = xascent;
 243         mindes_ = (3 * xascent) / 4;
 244         slevel_ = (4 * xascent) / 5;
 245         sshift_ = xascent / 4;
 246         kerning_ = 0;
 247
 248         if (empty()) {
 249                 // Cache the dimension.
 250                 mi.base.bv->coordCache().arrays().add(this, dim);
 251                 return;
 252         }
 253
 254         Cursor & cur = mi.base.bv->cursor();
 255         const_cast<MathData*>(this)->updateMacros(&cur, mi.macrocontext);
 256
 257         DocIterator const & inlineCompletionPos = mi.base.bv->inlineCompletionPos();
 258         MathData const * inlineCompletionData = 0;
 259         if (inlineCompletionPos.inMathed())
 260                 inlineCompletionData = &inlineCompletionPos.cell();
 261
 262         dim.asc = 0;
 263         dim.wid = 0;
 264         Dimension d;
 265         CoordCacheBase<Inset> & coords = mi.base.bv->coordCache().insets();
 266         for (pos_type i = 0, n = size(); i != n; ++i) {
 267                 MathAtom const & at = operator[](i);
 268                 at->metrics(mi, d);
 269                 coords.add(at.nucleus(), d);
 270                 dim += d;
 271                 if (i == n - 1)
 272                         kerning_ = at->kerning(mi.base.bv);
 273
 274                 // HACK to draw completion suggestion inline
 275                 if (inlineCompletionData != this
 276                     || size_t(inlineCompletionPos.pos()) != i + 1)
 277                         continue;
 278
 279                 docstring const & completion = mi.base.bv->inlineCompletion();
 280                 if (completion.length() == 0)
 281                         continue;
 282
 283                 dim.wid += mathed_string_width(mi.base.font, completion);
 284         }
 285         // Cache the dimension.
 286         mi.base.bv->coordCache().arrays().add(this, dim);
 287 }
 288
 289
 290 void MathData::draw(PainterInfo & pi, int x, int y) const
 291 {
 292         //lyxerr << "MathData::draw: x: " << x << " y: " << y << endl;
 293         BufferView & bv  = *pi.base.bv;
 294         setXY(bv, x, y);
 295
 296         Dimension const & dim = bv.coordCache().getArrays().dim(this);
 297
 298         if (empty()) {
 299                 pi.pain.rectangle(x, y - dim.ascent(), dim.width(), dim.height(), Color_mathline);
 300                 return;
 301         }
 302
 303         // don't draw outside the workarea
 304         if (y + dim.descent() <= 0
 305                 || y - dim.ascent() >= bv.workHeight()
 306                 || x + dim.width() <= 0
 307                 || x >= bv. workWidth())
 308                 return;
 309
 310         DocIterator const & inlineCompletionPos = bv.inlineCompletionPos();
 311         MathData const * inlineCompletionData = 0;
 312         if (inlineCompletionPos.inMathed())
 313                 inlineCompletionData = &inlineCompletionPos.cell();
 314
 315         CoordCacheBase<Inset> & coords = pi.base.bv->coordCache().insets();
 316         for (size_t i = 0, n = size(); i != n; ++i) {
 317                 MathAtom const & at = operator[](i);
 318                 coords.add(at.nucleus(), x, y);
 319                 at->drawSelection(pi, x, y);
 320                 at->draw(pi, x, y);
 321                 x += coords.dim(at.nucleus()).wid;
 322
 323                 // Is the inline completion here?
 324                 if (inlineCompletionData != this
 325                     || size_t(inlineCompletionPos.pos()) != i + 1)
 326                         continue;
 327                 docstring const & completion = bv.inlineCompletion();
 328                 if (completion.length() == 0)
 329                         continue;
 330                 FontInfo f = pi.base.font;
 331
 332                 // draw the unique and the non-unique completion part
 333                 // Note: this is not time-critical as it is
 334                 // only done once per screen.
 335                 size_t uniqueTo = bv.inlineCompletionUniqueChars();
 336                 docstring s1 = completion.substr(0, uniqueTo);
 337                 docstring s2 = completion.substr(uniqueTo);
 338
 339                 if (s1.size() > 0) {
 340                         f.setColor(Color_inlinecompletion);
 341                         pi.pain.text(x, y, s1, f);
 342                         x += mathed_string_width(f, s1);
 343                 }
 344
 345                 if (s2.size() > 0) {
 346                         f.setColor(Color_nonunique_inlinecompletion);
 347                         pi.pain.text(x, y, s2, f);
 348                         x += mathed_string_width(f, s2);
 349                 }
 350         }
 351 }
 352
 353
 354 void MathData::metricsT(TextMetricsInfo const & mi, Dimension & dim) const
 355 {
 356         dim.clear();
 357         Dimension d;
 358         for (const_iterator it = begin(); it != end(); ++it) {
 359                 (*it)->metricsT(mi, d);
 360                 dim += d;
 361         }
 362 }
 363
 364
 365 void MathData::drawT(TextPainter & pain, int x, int y) const
 366 {
 367         //lyxerr << "x: " << x << " y: " << y << ' ' << pain.workAreaHeight() << endl;
 368
 369         // FIXME: Abdel 16/10/2006
 370         // This drawT() method is never used, this is dead code.
 371
 372         for (const_iterator it = begin(), et = end(); it != et; ++it) {
 373                 (*it)->drawT(pain, x, y);
 374                 //x += (*it)->width_;
 375                 x += 2;
 376         }
 377 }
 378
 379
 380 void MathData::updateMacros(Cursor * cur, MacroContext const & mc)
 381 {
 382         // go over the array and look for macros
 383         for (size_t i = 0; i < size(); ++i) {
 384                 MathMacro * macroInset = operator[](i).nucleus()->asMacro();
 385                 if (!macroInset || macroInset->name_[0] == '^'
 386                                 || macroInset->name_[0] == '_')
 387                         continue;
 388
 389                 // get macro
 390                 macroInset->updateMacro(mc);
 391                 size_t macroNumArgs = 0;
 392                 size_t macroOptionals = 0;
 393                 MacroData const * macro = macroInset->macro();
 394                 if (macro) {
 395                         macroNumArgs = macro->numargs();
 396                         macroOptionals = macro->optionals();
 397                 }
 398
 399                 // store old and compute new display mode
 400                 MathMacro::DisplayMode newDisplayMode;
 401                 MathMacro::DisplayMode oldDisplayMode = macroInset->displayMode();
 402                 newDisplayMode = macroInset->computeDisplayMode();
 403
 404                 // arity changed or other reason to detach?
 405                 if (oldDisplayMode == MathMacro::DISPLAY_NORMAL
 406                     && (macroInset->arity() != macroNumArgs
 407                         || macroInset->optionals() != macroOptionals
 408                         || newDisplayMode == MathMacro::DISPLAY_UNFOLDED)) {
 409
 410                         detachMacroParameters(cur, i);
 411                 }
 412
 413                 // the macro could have been copied while resizing this
 414                 macroInset = operator[](i).nucleus()->asMacro();
 415
 416                 // Cursor in \label?
 417                 if (newDisplayMode != MathMacro::DISPLAY_UNFOLDED
 418                     && oldDisplayMode == MathMacro::DISPLAY_UNFOLDED) {
 419                         // put cursor in front of macro
 420                         if (cur) {
 421                                 int macroSlice = cur->find(macroInset);
 422                                 if (macroSlice != -1)
 423                                         cur->cutOff(macroSlice - 1);
 424                         }
 425                 }
 426
 427                 // update the display mode
 428                 size_t appetite = macroInset->appetite();
 429                 macroInset->setDisplayMode(newDisplayMode);
 430
 431                 // arity changed?
 432                 if (newDisplayMode == MathMacro::DISPLAY_NORMAL
 433                     && (macroInset->arity() != macroNumArgs
 434                         || macroInset->optionals() != macroOptionals)) {
 435                         // is it a virgin macro which was never attached to parameters?
 436                         bool fromInitToNormalMode
 437                         = (oldDisplayMode == MathMacro::DISPLAY_INIT
 438                            || oldDisplayMode == MathMacro::DISPLAY_INTERACTIVE_INIT)
 439                           && newDisplayMode == MathMacro::DISPLAY_NORMAL;
 440
 441                         // if the macro was entered interactively (i.e. not by paste or during
 442                         // loading), it should not be greedy, but the cursor should
 443                         // automatically jump into the macro when behind
 444                         bool interactive = (oldDisplayMode == MathMacro::DISPLAY_INTERACTIVE_INIT);
 445
 446                         // attach parameters
 447                         attachMacroParameters(cur, i, macroNumArgs, macroOptionals,
 448                                 fromInitToNormalMode, interactive, appetite);
 449
 450                         if (cur) {
 451                                 // FIXME: proper anchor handling, this removes the selection
 452                                 cur->updateInsets(&cur->bottom().inset());
 453                                 cur->clearSelection();
 454                         }
 455                 }
 456
 457                 // Give macro the chance to adapt to new situation.
 458                 // The macroInset could be invalid now because it was put into a script
 459                 // inset and therefore "deep" copied. So get it again from the MathData.
 460                 InsetMath * inset = operator[](i).nucleus();
 461                 if (inset->asScriptInset())
 462                         inset = inset->asScriptInset()->nuc()[0].nucleus();
 463                 LASSERT(inset->asMacro(), /**/);
 464                 inset->asMacro()->updateRepresentation();
 465         }
 466 }
 467
 468
 469 void MathData::detachMacroParameters(Cursor * cur, const size_type macroPos)
 470 {
 471         MathMacro * macroInset = operator[](macroPos).nucleus()->asMacro();
 472         Buffer * buf = cur->buffer();
 473
 474         // detach all arguments
 475         vector<MathData> detachedArgs;
 476         if (macroPos + 1 == size())
 477                 // strip arguments if we are at the MathData end
 478                 macroInset->detachArguments(detachedArgs, true);
 479         else
 480                 macroInset->detachArguments(detachedArgs, false);
 481
 482         // find cursor slice
 483         int curMacroSlice = -1;
 484         if (cur)
 485                 curMacroSlice = cur->find(macroInset);
 486         idx_type curMacroIdx = -1;
 487         pos_type curMacroPos = -1;
 488         vector<CursorSlice> argSlices;
 489         if (curMacroSlice != -1) {
 490                 curMacroPos = (*cur)[curMacroSlice].pos();
 491                 curMacroIdx = (*cur)[curMacroSlice].idx();
 492                 cur->cutOff(curMacroSlice, argSlices);
 493                 cur->pop_back();
 494         }
 495
 496         // only [] after the last non-empty argument can be dropped later
 497         size_t lastNonEmptyOptional = 0;
 498         for (size_t l = 0; l < detachedArgs.size() && l < macroInset->optionals(); ++l) {
 499                 if (!detachedArgs[l].empty())
 500                         lastNonEmptyOptional = l;
 501         }
 502
 503         // optional arguments to be put back?
 504         pos_type p = macroPos + 1;
 505         size_t j = 0;
 506         for (; j < detachedArgs.size() && j < macroInset->optionals(); ++j) {
 507                 // another non-empty parameter follows?
 508                 bool canDropEmptyOptional = j >= lastNonEmptyOptional;
 509
 510                 // then we can drop empty optional parameters
 511                 if (detachedArgs[j].empty() && canDropEmptyOptional) {
 512                         if (curMacroIdx == j)
 513                                 (*cur)[curMacroSlice - 1].pos() = macroPos + 1;
 514                         continue;
 515                 }
 516
 517                 // Otherwise we don't drop an empty optional, put it back normally
 518                 MathData optarg;
 519                 asArray(from_ascii("[]"), optarg);
 520                 MathData & arg = detachedArgs[j];
 521
 522                 // look for "]", i.e. put a brace around?
 523                 InsetMathBrace * brace = 0;
 524                 for (size_t q = 0; q < arg.size(); ++q) {
 525                         if (arg[q]->getChar() == ']') {
 526                                 // put brace
 527                                 brace = new InsetMathBrace(buf);
 528                                 break;
 529                         }
 530                 }
 531
 532                 // put arg between []
 533                 if (brace) {
 534                         brace->cell(0) = arg;
 535                         optarg.insert(1, MathAtom(brace));
 536                 } else
 537                         optarg.insert(1, arg);
 538
 539                 // insert it into the array
 540                 insert(p, optarg);
 541                 p += optarg.size();
 542
 543                 // cursor in macro?
 544                 if (curMacroSlice == -1)
 545                         continue;
 546
 547                 // cursor in optional argument of macro?
 548                 if (curMacroIdx == j) {
 549                         if (brace) {
 550                                 cur->append(0, curMacroPos);
 551                                 (*cur)[curMacroSlice - 1].pos() = macroPos + 2;
 552                         } else
 553                                 (*cur)[curMacroSlice - 1].pos() = macroPos + 2 + curMacroPos;
 554                         cur->append(argSlices);
 555                 } else if ((*cur)[curMacroSlice - 1].pos() >= int(p))
 556                         // cursor right of macro
 557                         (*cur)[curMacroSlice - 1].pos() += optarg.size();
 558         }
 559
 560         // put them back into the MathData
 561         for (; j < detachedArgs.size(); ++j, ++p) {
 562                 MathData const & arg = detachedArgs[j];
 563                 if (arg.size() == 1
 564                     && !arg[0]->asScriptInset()
 565                     && !(arg[0]->asMacro() && arg[0]->asMacro()->arity() > 0))
 566                         insert(p, arg[0]);
 567                 else
 568                         insert(p, MathAtom(new InsetMathBrace(arg)));
 569
 570                 // cursor in macro?
 571                 if (curMacroSlice == -1)
 572                         continue;
 573
 574                 // cursor in j-th argument of macro?
 575                 if (curMacroIdx == j) {
 576                         if (operator[](p).nucleus()->asBraceInset()) {
 577                                 (*cur)[curMacroSlice - 1].pos() = p;
 578                                 cur->append(0, curMacroPos);
 579                                 cur->append(argSlices);
 580                         } else {
 581                                 (*cur)[curMacroSlice - 1].pos() = p; // + macroPos;
 582                                 cur->append(argSlices);
 583                         }
 584                 } else if ((*cur)[curMacroSlice - 1].pos() >= int(p))
 585                         ++(*cur)[curMacroSlice - 1].pos();
 586         }
 587
 588         if (cur) {
 589                 // FIXME: proper anchor handling, this removes the selection
 590                 cur->clearSelection();
 591                 cur->updateInsets(&cur->bottom().inset());
 592         }
 593 }
 594
 595
 596 void MathData::attachMacroParameters(Cursor * cur,
 597         const size_type macroPos, const size_type macroNumArgs,
 598         const int macroOptionals, const bool fromInitToNormalMode,
 599         const bool interactiveInit, const size_t appetite)
 600 {
 601         MathMacro * macroInset = operator[](macroPos).nucleus()->asMacro();
 602
 603         // start at atom behind the macro again, maybe with some new arguments
 604         // from the detach phase above, to add them back into the macro inset
 605         size_t p = macroPos + 1;
 606         vector<MathData> detachedArgs;
 607         MathAtom scriptToPutAround;
 608
 609         // find cursor slice again of this MathData
 610         int thisSlice = -1;
 611         if (cur)
 612                 thisSlice = cur->find(*this);
 613         int thisPos = -1;
 614         if (thisSlice != -1)
 615                 thisPos = (*cur)[thisSlice].pos();
 616
 617         // find arguments behind the macro
 618         if (!interactiveInit) {
 619                 collectOptionalParameters(cur, macroOptionals, detachedArgs, p,
 620                         scriptToPutAround, macroPos, thisPos, thisSlice);
 621         }
 622         collectParameters(cur, macroNumArgs, detachedArgs, p,
 623                 scriptToPutAround, macroPos, thisPos, thisSlice, appetite);
 624
 625         // attach arguments back to macro inset
 626         macroInset->attachArguments(detachedArgs, macroNumArgs, macroOptionals);
 627
 628         // found tail script? E.g. \foo{a}b^x
 629         if (scriptToPutAround.nucleus()) {
 630                 // put macro into a script inset
 631                 scriptToPutAround.nucleus()->asScriptInset()->nuc()[0]
 632                 = operator[](macroPos);
 633                 operator[](macroPos) = scriptToPutAround;
 634
 635                 // go into the script inset nucleus
 636                 if (cur && thisPos == int(macroPos))
 637                         cur->append(0, 0);
 638
 639                 // get pointer to "deep" copied macro inset
 640                 InsetMathScript * scriptInset
 641                 = operator[](macroPos).nucleus()->asScriptInset();
 642                 macroInset = scriptInset->nuc()[0].nucleus()->asMacro();
 643         }
 644
 645         // remove them from the MathData
 646         erase(begin() + macroPos + 1, begin() + p);
 647
 648         // cursor outside this MathData?
 649         if (thisSlice == -1)
 650                 return;
 651
 652         // fix cursor if right of p
 653         if (thisPos >= int(p))
 654                 (*cur)[thisSlice].pos() -= p - (macroPos + 1);
 655
 656         // was the macro inset just inserted interactively and was now folded
 657         // and the cursor is just behind?
 658         if ((*cur)[thisSlice].pos() == int(macroPos + 1)
 659             && interactiveInit
 660             && fromInitToNormalMode
 661             && macroInset->arity() > 0
 662             && thisSlice + 1 == int(cur->depth())) {
 663                 // then enter it if the cursor was just behind
 664                 (*cur)[thisSlice].pos() = macroPos;
 665                 cur->push_back(CursorSlice(*macroInset));
 666                 macroInset->idxFirst(*cur);
 667         }
 668 }
 669
 670
 671 void MathData::collectOptionalParameters(Cursor * cur,
 672         const size_type numOptionalParams, vector<MathData> & params,
 673         size_t & pos, MathAtom & scriptToPutAround,
 674         const pos_type macroPos, const int thisPos, const int thisSlice)
 675 {
 676         Buffer * buf = cur ? cur->buffer() : 0;
 677         // insert optional arguments?
 678         while (params.size() < numOptionalParams
 679                && pos < size()
 680                && !scriptToPutAround.nucleus()) {
 681                 // is a [] block following which could be an optional parameter?
 682                 if (operator[](pos)->getChar() != '[')
 683                         break;
 684
 685                 // found possible optional argument, look for "]"
 686                 size_t right = pos + 1;
 687                 for (; right < size(); ++right) {
 688                         MathAtom & cell = operator[](right);
 689
 690                         if (cell->getChar() == ']')
 691                                 // found right end
 692                                 break;
 693
 694                         // maybe "]" with a script around?
 695                         InsetMathScript * script = cell.nucleus()->asScriptInset();
 696                         if (!script)
 697                                 continue;
 698                         if (script->nuc().size() != 1)
 699                                 continue;
 700                         if (script->nuc()[0]->getChar() == ']') {
 701                                 // script will be put around the macro later
 702                                 scriptToPutAround = cell;
 703                                 break;
 704                         }
 705                 }
 706
 707                 // found?
 708                 if (right >= size()) {
 709                         // no ] found, so it's not an optional argument
 710                         break;
 711                 }
 712
 713                 // add everything between [ and ] as optional argument
 714                 MathData optarg(buf, begin() + pos + 1, begin() + right);
 715
 716                 // a brace?
 717                 bool brace = false;
 718                 if (optarg.size() == 1 && optarg[0]->asBraceInset()) {
 719                         brace = true;
 720                         params.push_back(optarg[0]->asBraceInset()->cell(0));
 721                 } else
 722                         params.push_back(optarg);
 723
 724                 // place cursor in optional argument of macro
 725                 if (thisSlice != -1
 726                     && thisPos >= int(pos) && thisPos <= int(right)) {
 727                         int paramPos = max(0, thisPos - int(pos) - 1);
 728                         vector<CursorSlice> x;
 729                         cur->cutOff(thisSlice, x);
 730                         (*cur)[thisSlice].pos() = macroPos;
 731                         if (brace) {
 732                                 paramPos = x[0].pos();
 733                                 x.erase(x.begin());
 734                         }
 735                         cur->append(0, paramPos);
 736                         cur->append(x);
 737                 }
 738                 pos = right + 1;
 739         }
 740
 741         // fill up empty optional parameters
 742         while (params.size() < numOptionalParams)
 743                 params.push_back(MathData());
 744 }
 745
 746
 747 void MathData::collectParameters(Cursor * cur,
 748         const size_type numParams, vector<MathData> & params,
 749         size_t & pos, MathAtom & scriptToPutAround,
 750         const pos_type macroPos, const int thisPos, const int thisSlice,
 751         const size_t appetite)
 752 {
 753         size_t startSize = params.size();
 754
 755         // insert normal arguments
 756         while (params.size() < numParams
 757                && params.size() - startSize < appetite
 758                && pos < size()
 759                && !scriptToPutAround.nucleus()) {
 760                 MathAtom & cell = operator[](pos);
 761
 762                 // fix cursor
 763                 vector<CursorSlice> argSlices;
 764                 int argPos = 0;
 765                 if (thisSlice != -1 && thisPos == int(pos))
 766                         cur->cutOff(thisSlice, argSlices);
 767
 768                 // which kind of parameter is it? In {}? With index x^n?
 769                 InsetMathBrace const * brace = cell->asBraceInset();
 770                 if (brace) {
 771                         // found brace, convert into argument
 772                         params.push_back(brace->cell(0));
 773
 774                         // cursor inside of the brace or just in front of?
 775                         if (thisPos == int(pos) && !argSlices.empty()) {
 776                                 argPos = argSlices[0].pos();
 777                                 argSlices.erase(argSlices.begin());
 778                         }
 779                 } else if (cell->asScriptInset() && params.size() + 1 == numParams) {
 780                         // last inset with scripts without braces
 781                         // -> they belong to the macro, not the argument
 782                         InsetMathScript * script = cell.nucleus()->asScriptInset();
 783                         if (script->nuc().size() == 1 && script->nuc()[0]->asBraceInset())
 784                                 // nucleus in brace? Unpack!
 785                                 params.push_back(script->nuc()[0]->asBraceInset()->cell(0));
 786                         else
 787                                 params.push_back(script->nuc());
 788
 789                         // script will be put around below
 790                         scriptToPutAround = cell;
 791
 792                         // this should only happen after loading, so make cursor handling simple
 793                         if (thisPos >= int(macroPos) && thisPos <= int(macroPos + numParams)) {
 794                                 argSlices.clear();
 795                                 if (cur)
 796                                         cur->append(0, 0);
 797                         }
 798                 } else {
 799                         // the simplest case: plain inset
 800                         MathData array;
 801                         array.insert(0, cell);
 802                         params.push_back(array);
 803                 }
 804
 805                 // put cursor in argument again
 806                 if (thisSlice != - 1 && thisPos == int(pos)) {
 807                         cur->append(params.size() - 1, argPos);
 808                         cur->append(argSlices);
 809                         (*cur)[thisSlice].pos() = macroPos;
 810                 }
 811
 812                 ++pos;
 813         }
 814 }
 815
 816
 817 int MathData::pos2x(BufferView const * bv, size_type pos) const
 818 {
 819         return pos2x(bv, pos, 0);
 820 }
 821
 822
 823 int MathData::pos2x(BufferView const * bv, size_type pos, int glue) const
 824 {
 825         int x = 0;
 826         size_type target = min(pos, size());
 827         CoordCacheBase<Inset> const & coords = bv->coordCache().getInsets();
 828         for (size_type i = 0; i < target; ++i) {
 829                 const_iterator it = begin() + i;
 830                 if ((*it)->getChar() == ' ')
 831                         x += glue;
 832                 //lyxerr << "char: " << (*it)->getChar()
 833                 //      << "width: " << (*it)->width() << endl;
 834                 x += coords.dim((*it).nucleus()).wid;
 835         }
 836         return x;
 837 }
 838
 839
 840 MathData::size_type MathData::x2pos(BufferView const * bv, int targetx) const
 841 {
 842         return x2pos(bv, targetx, 0);
 843 }
 844
 845
 846 MathData::size_type MathData::x2pos(BufferView const * bv, int targetx, int glue) const
 847 {
 848         const_iterator it = begin();
 849         int lastx = 0;
 850         int currx = 0;
 851         CoordCacheBase<Inset> const & coords = bv->coordCache().getInsets();
 852         // find first position after targetx
 853         for (; currx < targetx && it < end(); ++it) {
 854                 lastx = currx;
 855                 if ((*it)->getChar() == ' ')
 856                         currx += glue;
 857                 currx += coords.dim((*it).nucleus()).wid;
 858         }
 859
 860         /**
 861          * If we are not at the beginning of the array, go to the left
 862          * of the inset if one of the following two condition holds:
 863          * - the current inset is editable (so that the cursor tip is
 864          *   deeper than us): in this case, we want all intermediate
 865          *   cursor slices to be before insets;
 866          * - the mouse is closer to the left side of the inset than to
 867          *   the right one.
 868          * See bug 1918 for details.
 869          **/
 870         if (it != begin() && currx >= targetx
 871             && ((*boost::prior(it))->asNestInset()
 872                 || abs(lastx - targetx) < abs(currx - targetx))) {
 873                 --it;
 874         }
 875
 876         return it - begin();
 877 }
 878
 879
 880 int MathData::dist(BufferView const & bv, int x, int y) const
 881 {
 882         return bv.coordCache().getArrays().squareDistance(this, x, y);
 883 }
 884
 885
 886 void MathData::setXY(BufferView & bv, int x, int y) const
 887 {
 888         //lyxerr << "setting position cache for MathData " << this << endl;
 889         bv.coordCache().arrays().add(this, x, y);
 890 }
 891
 892
 893 Dimension const & MathData::dimension(BufferView const & bv) const
 894 {
 895         return bv.coordCache().getArrays().dim(this);
 896 }
 897
 898
 899 int MathData::xm(BufferView const & bv) const
 900 {
 901         Geometry const & g = bv.coordCache().getArrays().geometry(this);
 902
 903         return g.pos.x_ + g.dim.wid / 2;
 904 }
 905
 906
 907 int MathData::ym(BufferView const & bv) const
 908 {
 909         Geometry const & g = bv.coordCache().getArrays().geometry(this);
 910
 911         return g.pos.y_ + (g.dim.des - g.dim.asc) / 2;
 912 }
 913
 914
 915 int MathData::xo(BufferView const & bv) const
 916 {
 917         return bv.coordCache().getArrays().x(this);
 918 }
 919
 920
 921 int MathData::yo(BufferView const & bv) const
 922 {
 923         return bv.coordCache().getArrays().y(this);
 924 }
 925
 926
 927 ostream & operator<<(ostream & os, MathData const & ar)
 928 {
 929         odocstringstream oss;
 930         NormalStream ns(oss);
 931         ns << ar;
 932         return os << to_utf8(oss.str());
 933 }
 934
 935
 936 odocstream & operator<<(odocstream & os, MathData const & ar)
 937 {
 938         NormalStream ns(os);
 939         ns << ar;
 940         return os;
 941 }
 942
 943
 944 } // namespace lyx