src/mathed/InsetMathNest.cpp

   1 /**
   2  * \file InsetMathNest.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  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathNest.h"
  14
  15 #include "InsetMathArray.h"
  16 #include "InsetMathAMSArray.h"
  17 #include "InsetMathBig.h"
  18 #include "InsetMathBox.h"
  19 #include "InsetMathBrace.h"
  20 #include "InsetMathChar.h"
  21 #include "InsetMathColor.h"
  22 #include "InsetMathComment.h"
  23 #include "InsetMathDelim.h"
  24 #include "InsetMathEnsureMath.h"
  25 #include "InsetMathHull.h"
  26 #include "InsetMathRef.h"
  27 #include "InsetMathScript.h"
  28 #include "InsetMathSpace.h"
  29 #include "InsetMathSymbol.h"
  30 #include "InsetMathUnknown.h"
  31 #include "MathAutoCorrect.h"
  32 #include "MathCompletionList.h"
  33 #include "MathData.h"
  34 #include "MathFactory.h"
  35 #include "MathMacro.h"
  36 #include "MathMacroArgument.h"
  37 #include "MathParser.h"
  38 #include "MathStream.h"
  39 #include "MathSupport.h"
  40
  41 #include "Bidi.h"
  42 #include "Buffer.h"
  43 #include "BufferView.h"
  44 #include "CoordCache.h"
  45 #include "Cursor.h"
  46 #include "CutAndPaste.h"
  47 #include "DispatchResult.h"
  48 #include "Encoding.h"
  49 #include "FuncRequest.h"
  50 #include "FuncStatus.h"
  51 #include "LyX.h"
  52 #include "LyXRC.h"
  53 #include "OutputParams.h"
  54 #include "Text.h"
  55
  56 #include "frontends/Clipboard.h"
  57 #include "frontends/Painter.h"
  58 #include "frontends/Selection.h"
  59
  60 #include "support/lassert.h"
  61 #include "support/debug.h"
  62 #include "support/gettext.h"
  63 #include "support/lstrings.h"
  64 #include "support/textutils.h"
  65 #include "support/docstream.h"
  66
  67 #include <algorithm>
  68 #include <sstream>
  69
  70 using namespace std;
  71 using namespace lyx::support;
  72
  73 namespace lyx {
  74
  75 using cap::copySelection;
  76 using cap::grabAndEraseSelection;
  77 using cap::cutSelection;
  78 using cap::replaceSelection;
  79 using cap::selClearOrDel;
  80
  81
  82 InsetMathNest::InsetMathNest(Buffer * buf, idx_type nargs)
  83         : InsetMath(buf), cells_(nargs), lock_(false)
  84 {
  85         setBuffer(*buf);
  86 }
  87
  88
  89 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  90         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_)
  91 {}
  92
  93
  94 InsetMathNest::~InsetMathNest()
  95 {
  96         map<BufferView const *, bool>::iterator it = mouse_hover_.begin();
  97         map<BufferView const *, bool>::iterator end = mouse_hover_.end();
  98         for (; it != end; ++it)
  99                 if (it->second)
 100                         it->first->clearLastInset(this);
 101 }
 102
 103
 104 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
 105 {
 106         cells_ = inset.cells_;
 107         lock_ = inset.lock_;
 108         mouse_hover_.clear();
 109         InsetMath::operator=(inset);
 110         return *this;
 111 }
 112
 113
 114 void InsetMathNest::setBuffer(Buffer & buffer)
 115 {
 116         InsetMath::setBuffer(buffer);
 117         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 118                 MathData & data = cell(i);
 119                 for (size_t j = 0; j != data.size(); ++j)
 120                         data[j].nucleus()->setBuffer(buffer);
 121         }
 122 }
 123
 124
 125 InsetMath::idx_type InsetMathNest::nargs() const
 126 {
 127         return cells_.size();
 128 }
 129
 130
 131 void InsetMathNest::cursorPos(BufferView const & bv,
 132                 CursorSlice const & sl, bool /*boundary*/,
 133                 int & x, int & y) const
 134 {
 135 // FIXME: This is a hack. Ideally, the coord cache should not store
 136 // absolute positions, but relative ones. This would mean to call
 137 // setXY() not in MathData::draw(), but in the parent insets' draw()
 138 // with the correctly adjusted x,y values. But this means that we'd have
 139 // to touch all (math)inset's draw() methods. Right now, we'll store
 140 // absolute value, and make them here relative, only to make them
 141 // absolute again when actually drawing the cursor. What a mess.
 142         LASSERT(&sl.inset() == this, /**/);
 143         MathData const & ar = sl.cell();
 144         CoordCache const & coord_cache = bv.coordCache();
 145         if (!coord_cache.getArrays().has(&ar)) {
 146                 // this can (semi-)legally happen if we just created this cell
 147                 // and it never has been drawn before. So don't ASSERT.
 148                 //lyxerr << "no cached data for array " << &ar << endl;
 149                 x = 0;
 150                 y = 0;
 151                 return;
 152         }
 153         Point const pt = coord_cache.getArrays().xy(&ar);
 154         if (!coord_cache.getInsets().has(this)) {
 155                 // same as above
 156                 //lyxerr << "no cached data for inset " << this << endl;
 157                 x = 0;
 158                 y = 0;
 159                 return;
 160         }
 161         Point const pt2 = coord_cache.getInsets().xy(this);
 162         //lyxerr << "retrieving position cache for MathData "
 163         //      << pt.x_ << ' ' << pt.y_ << endl;
 164         x = pt.x_ - pt2.x_ + ar.pos2x(&bv, sl.pos());
 165         y = pt.y_ - pt2.y_;
 166 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 167 //              << " asc: " << ascent() << "  des: " << descent()
 168 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 169         // move cursor visually into empty cells ("blue rectangles");
 170         if (ar.empty())
 171                 x += 2;
 172 }
 173
 174
 175 void InsetMathNest::metrics(MetricsInfo const & mi) const
 176 {
 177         MetricsInfo m = mi;
 178         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 179                 Dimension dim;
 180                 cell(i).metrics(m, dim);
 181         }
 182 }
 183
 184
 185 void InsetMathNest::updateBuffer(ParIterator const & it, UpdateType utype)
 186 {
 187         for (idx_type i = 0, n = nargs(); i != n; ++i)
 188                 cell(i).updateBuffer(it, utype);
 189 }
 190
 191
 192
 193 bool InsetMathNest::idxNext(Cursor & cur) const
 194 {
 195         LASSERT(&cur.inset() == this, /**/);
 196         if (cur.idx() == cur.lastidx())
 197                 return false;
 198         ++cur.idx();
 199         cur.pos() = 0;
 200         return true;
 201 }
 202
 203
 204 bool InsetMathNest::idxForward(Cursor & cur) const
 205 {
 206         return idxNext(cur);
 207 }
 208
 209
 210 bool InsetMathNest::idxPrev(Cursor & cur) const
 211 {
 212         LASSERT(&cur.inset() == this, /**/);
 213         if (cur.idx() == 0)
 214                 return false;
 215         --cur.idx();
 216         cur.pos() = cur.lastpos();
 217         return true;
 218 }
 219
 220
 221 bool InsetMathNest::idxBackward(Cursor & cur) const
 222 {
 223         return idxPrev(cur);
 224 }
 225
 226
 227 bool InsetMathNest::idxFirst(Cursor & cur) const
 228 {
 229         LASSERT(&cur.inset() == this, /**/);
 230         if (nargs() == 0)
 231                 return false;
 232         cur.idx() = 0;
 233         cur.pos() = 0;
 234         return true;
 235 }
 236
 237
 238 bool InsetMathNest::idxLast(Cursor & cur) const
 239 {
 240         LASSERT(&cur.inset() == this, /**/);
 241         if (nargs() == 0)
 242                 return false;
 243         cur.idx() = cur.lastidx();
 244         cur.pos() = cur.lastpos();
 245         return true;
 246 }
 247
 248
 249 void InsetMathNest::dump() const
 250 {
 251         odocstringstream oss;
 252         WriteStream os(oss);
 253         os << "---------------------------------------------\n";
 254         write(os);
 255         os << "\n";
 256         for (idx_type i = 0, n = nargs(); i != n; ++i)
 257                 os << cell(i) << "\n";
 258         os << "---------------------------------------------\n";
 259         lyxerr << to_utf8(oss.str());
 260 }
 261
 262
 263 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 264 {
 265 #if 0
 266         if (lock_)
 267                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 268                                         Color_mathlockbg);
 269 #endif
 270         setPosCache(pi, x, y);
 271 }
 272
 273
 274 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 275 {
 276         BufferView & bv = *pi.base.bv;
 277         // this should use the x/y values given, not the cached values
 278         Cursor & cur = bv.cursor();
 279         if (!cur.selection())
 280                 return;
 281         if (&cur.inset() != this)
 282                 return;
 283
 284         // FIXME: hack to get position cache warm
 285         bool const original_drawing_state = pi.pain.isDrawingEnabled();
 286         pi.pain.setDrawingEnabled(false);
 287         draw(pi, x, y);
 288         pi.pain.setDrawingEnabled(original_drawing_state);
 289
 290         CursorSlice s1 = cur.selBegin();
 291         CursorSlice s2 = cur.selEnd();
 292
 293         //lyxerr << "InsetMathNest::drawing selection: "
 294         //      << " s1: " << s1 << " s2: " << s2 << endl;
 295         if (s1.idx() == s2.idx()) {
 296                 MathData const & c = cell(s1.idx());
 297                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 298                 int x1 = g.pos.x_ + c.pos2x(pi.base.bv, s1.pos());
 299                 int y1 = g.pos.y_ - g.dim.ascent();
 300                 int x2 = g.pos.x_ + c.pos2x(pi.base.bv, s2.pos());
 301                 int y2 = g.pos.y_ + g.dim.descent();
 302                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 303         //lyxerr << "InsetMathNest::drawing selection 3: "
 304         //      << " x1: " << x1 << " x2: " << x2
 305         //      << " y1: " << y1 << " y2: " << y2 << endl;
 306         } else {
 307                 for (idx_type i = 0; i < nargs(); ++i) {
 308                         if (idxBetween(i, s1.idx(), s2.idx())) {
 309                                 MathData const & c = cell(i);
 310                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 311                                 int x1 = g.pos.x_;
 312                                 int y1 = g.pos.y_ - g.dim.ascent();
 313                                 int x2 = g.pos.x_ + g.dim.width();
 314                                 int y2 = g.pos.y_ + g.dim.descent();
 315                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 316                         }
 317                 }
 318         }
 319 }
 320
 321
 322 void InsetMathNest::validate(LaTeXFeatures & features) const
 323 {
 324         for (idx_type i = 0; i < nargs(); ++i)
 325                 cell(i).validate(features);
 326 }
 327
 328
 329 void InsetMathNest::replace(ReplaceData & rep)
 330 {
 331         for (idx_type i = 0; i < nargs(); ++i)
 332                 cell(i).replace(rep);
 333 }
 334
 335
 336 bool InsetMathNest::contains(MathData const & ar) const
 337 {
 338         for (idx_type i = 0; i < nargs(); ++i)
 339                 if (cell(i).contains(ar))
 340                         return true;
 341         return false;
 342 }
 343
 344
 345 bool InsetMathNest::lock() const
 346 {
 347         return lock_;
 348 }
 349
 350
 351 void InsetMathNest::lock(bool l)
 352 {
 353         lock_ = l;
 354 }
 355
 356
 357 bool InsetMathNest::isActive() const
 358 {
 359         return nargs() > 0;
 360 }
 361
 362
 363 MathData InsetMathNest::glue() const
 364 {
 365         MathData ar;
 366         for (size_t i = 0; i < nargs(); ++i)
 367                 ar.append(cell(i));
 368         return ar;
 369 }
 370
 371
 372 void InsetMathNest::write(WriteStream & os) const
 373 {
 374         ModeSpecifier specifier(os, currentMode(), lockedMode());
 375         docstring const latex_name = name();
 376         os << '\\' << latex_name;
 377         for (size_t i = 0; i < nargs(); ++i)
 378                 os << '{' << cell(i) << '}';
 379         if (nargs() == 0)
 380                 os.pendingSpace(true);
 381         if (lock_ && !os.latex()) {
 382                 os << "\\lyxlock";
 383                 os.pendingSpace(true);
 384         }
 385 }
 386
 387
 388 void InsetMathNest::normalize(NormalStream & os) const
 389 {
 390         os << '[' << name();
 391         for (size_t i = 0; i < nargs(); ++i)
 392                 os << ' ' << cell(i);
 393         os << ']';
 394 }
 395
 396
 397 int InsetMathNest::latex(odocstream & os, OutputParams const & runparams) const
 398 {
 399         WriteStream wi(os, runparams.moving_arg, true,
 400                        runparams.dryrun ? WriteStream::wsDryrun : WriteStream::wsDefault,
 401                        runparams.encoding);
 402         write(wi);
 403         return wi.line();
 404 }
 405
 406
 407 bool InsetMathNest::setMouseHover(BufferView const * bv, bool mouse_hover)
 408 {
 409         mouse_hover_[bv] = mouse_hover;
 410         return true;
 411 }
 412
 413
 414 bool InsetMathNest::notifyCursorLeaves(Cursor const & /*old*/, Cursor & /*cur*/)
 415 {
 416         // FIXME: look here
 417 #if 0
 418         MathData & ar = cur.cell();
 419         // remove base-only "scripts"
 420         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 421                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 422                 if (p && p->nargs() == 1) {
 423                         MathData ar = p->nuc();
 424                         erase(i);
 425                         insert(i, ar);
 426                         cur.adjust(i, ar.size() - 1);
 427                 }
 428         }
 429
 430         // glue adjacent font insets of the same kind
 431         for (pos_type i = 0; i + 1 < size(); ++i) {
 432                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 433                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 434                 if (p && q && p->name() == q->name()) {
 435                         p->cell(0).append(q->cell(0));
 436                         erase(i + 1);
 437                         cur.adjust(i, -1);
 438                 }
 439         }
 440 #endif
 441         return false;
 442 }
 443
 444
 445 void InsetMathNest::handleFont
 446         (Cursor & cur, docstring const & arg, char const * const font)
 447 {
 448         handleFont(cur, arg, from_ascii(font));
 449 }
 450
 451
 452 void InsetMathNest::handleFont(Cursor & cur, docstring const & arg,
 453         docstring const & font)
 454 {
 455         cur.recordUndoSelection();
 456
 457         // this whole function is a hack and won't work for incremental font
 458         // changes...
 459         if (cur.inset().asInsetMath()->name() == font)
 460                 cur.handleFont(to_utf8(font));
 461         else
 462                 handleNest(cur, createInsetMath(font, cur.buffer()), arg);
 463 }
 464
 465
 466 void InsetMathNest::handleNest(Cursor & cur, MathAtom const & nest)
 467 {
 468         handleNest(cur, nest, docstring());
 469 }
 470
 471
 472 void InsetMathNest::handleNest(Cursor & cur, MathAtom const & nest,
 473         docstring const & arg)
 474 {
 475         CursorSlice i1 = cur.selBegin();
 476         CursorSlice i2 = cur.selEnd();
 477         if (!i1.inset().asInsetMath())
 478                 return;
 479         if (i1.idx() == i2.idx()) {
 480                 // the easy case where only one cell is selected
 481                 cur.handleNest(nest);
 482                 cur.insert(arg);
 483                 return;
 484         }
 485
 486         // multiple selected cells in a simple non-grid inset
 487         if (i1.asInsetMath()->nrows() == 0 || i1.asInsetMath()->ncols() == 0) {
 488                 for (idx_type i = i1.idx(); i <= i2.idx(); ++i) {
 489                         // select cell
 490                         cur.idx() = i;
 491                         cur.pos() = 0;
 492                         cur.resetAnchor();
 493                         cur.pos() = cur.lastpos();
 494                         cur.setSelection();
 495
 496                         // change font of cell
 497                         cur.handleNest(nest);
 498                         cur.insert(arg);
 499
 500                         // cur is in the font inset now. If the loop continues,
 501                         // we need to get outside again for the next cell
 502                         if (i + 1 <= i2.idx())
 503                                 cur.pop_back();
 504                 }
 505                 return;
 506         }
 507
 508         // the complicated case with multiple selected cells in a grid
 509         row_type r1, r2;
 510         col_type c1, c2;
 511         cap::region(i1, i2, r1, r2, c1, c2);
 512         for (row_type row = r1; row <= r2; ++row) {
 513                 for (col_type col = c1; col <= c2; ++col) {
 514                         // select cell
 515                         cur.idx() = i1.asInsetMath()->index(row, col);
 516                         cur.pos() = 0;
 517                         cur.resetAnchor();
 518                         cur.pos() = cur.lastpos();
 519                         cur.setSelection();
 520
 521                         //
 522                         cur.handleNest(nest);
 523                         cur.insert(arg);
 524
 525                         // cur is in the font inset now. If the loop continues,
 526                         // we need to get outside again for the next cell
 527                         if (col + 1 <= c2 || row + 1 <= r2)
 528                                 cur.pop_back();
 529                 }
 530         }
 531 }
 532
 533
 534 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 535 {
 536         cur.recordUndoSelection();
 537         Font font;
 538         bool b;
 539         font.fromString(to_utf8(arg), b);
 540         if (font.fontInfo().color() != Color_inherit &&
 541             font.fontInfo().color() != Color_ignore)
 542                 handleNest(cur, MathAtom(new InsetMathColor(buffer_, true, font.fontInfo().color())));
 543
 544         // FIXME: support other font changes here as well?
 545 }
 546
 547
 548 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 549 {
 550         //LYXERR0("InsetMathNest: request: " << cmd);
 551
 552         Parse::flags parseflg = Parse::QUIET | Parse::USETEXT;
 553
 554         FuncCode const act = cmd.action();
 555         switch (act) {
 556
 557         case LFUN_CLIPBOARD_PASTE:
 558                 parseflg |= Parse::VERBATIM;
 559                 // fall through
 560         case LFUN_PASTE: {
 561                 if (cur.currentMode() <= TEXT_MODE)
 562                         parseflg |= Parse::TEXTMODE;
 563                 cur.recordUndoSelection();
 564                 cur.message(_("Paste"));
 565                 replaceSelection(cur);
 566                 docstring topaste;
 567                 if (cmd.argument().empty() && !theClipboard().isInternal())
 568                         topaste = theClipboard().getAsText();
 569                 else {
 570                         size_t n = 0;
 571                         idocstringstream is(cmd.argument());
 572                         is >> n;
 573                         topaste = cap::selection(n);
 574                 }
 575                 cur.niceInsert(topaste, parseflg, false);
 576                 cur.clearSelection(); // bug 393
 577                 cur.forceBufferUpdate();
 578                 cur.finishUndo();
 579                 break;
 580         }
 581
 582         case LFUN_CUT:
 583                 cur.recordUndo();
 584                 cutSelection(cur, true, true);
 585                 cur.message(_("Cut"));
 586                 // Prevent stale position >= size crash
 587                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 588                 cur.normalize();
 589                 cur.forceBufferUpdate();
 590                 break;
 591
 592         case LFUN_COPY:
 593                 copySelection(cur);
 594                 cur.message(_("Copy"));
 595                 break;
 596
 597         case LFUN_MOUSE_PRESS:
 598                 lfunMousePress(cur, cmd);
 599                 break;
 600
 601         case LFUN_MOUSE_MOTION:
 602                 lfunMouseMotion(cur, cmd);
 603                 break;
 604
 605         case LFUN_MOUSE_RELEASE:
 606                 lfunMouseRelease(cur, cmd);
 607                 break;
 608
 609         case LFUN_FINISHED_LEFT: // in math, left is backwards
 610         case LFUN_FINISHED_BACKWARD:
 611                 cur.bv().cursor() = cur;
 612                 break;
 613
 614         case LFUN_FINISHED_RIGHT: // in math, right is forward
 615         case LFUN_FINISHED_FORWARD:
 616                 ++cur.pos();
 617                 cur.bv().cursor() = cur;
 618                 break;
 619
 620         case LFUN_CHAR_RIGHT:
 621         case LFUN_CHAR_LEFT:
 622         case LFUN_CHAR_BACKWARD:
 623         case LFUN_CHAR_FORWARD:
 624                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 625         case LFUN_CHAR_RIGHT_SELECT:
 626         case LFUN_CHAR_LEFT_SELECT:
 627         case LFUN_CHAR_BACKWARD_SELECT:
 628         case LFUN_CHAR_FORWARD_SELECT: {
 629                 // are we in a selection?
 630                 bool select = (act == LFUN_CHAR_RIGHT_SELECT
 631                                            || act == LFUN_CHAR_LEFT_SELECT
 632                                            || act == LFUN_CHAR_BACKWARD_SELECT
 633                                            || act == LFUN_CHAR_FORWARD_SELECT);
 634                 // are we moving forward or backwards?
 635                 // If the command was RIGHT or LEFT, then whether we're moving forward
 636                 // or backwards depends on the cursor movement mode (logical or visual):
 637                 //  * in visual mode, since math is always LTR, right -> forward,
 638                 //    left -> backwards
 639                 //  * in logical mode, the mapping is determined by the
 640                 //    reverseDirectionNeeded() function
 641
 642                 bool forward;
 643                 FuncCode finish_lfun;
 644
 645                 if (act == LFUN_CHAR_FORWARD
 646                                 || act == LFUN_CHAR_FORWARD_SELECT) {
 647                         forward = true;
 648                         finish_lfun = LFUN_FINISHED_FORWARD;
 649                 }
 650                 else if (act == LFUN_CHAR_BACKWARD
 651                                 || act == LFUN_CHAR_BACKWARD_SELECT) {
 652                         forward = false;
 653                         finish_lfun = LFUN_FINISHED_BACKWARD;
 654                 }
 655                 else {
 656                         bool right = (act == LFUN_CHAR_RIGHT_SELECT
 657                                                   || act == LFUN_CHAR_RIGHT);
 658                         if (lyxrc.visual_cursor || !reverseDirectionNeeded(cur))
 659                                 forward = right;
 660                         else
 661                                 forward = !right;
 662
 663                         if (right)
 664                                 finish_lfun = LFUN_FINISHED_RIGHT;
 665                         else
 666                                 finish_lfun = LFUN_FINISHED_LEFT;
 667                 }
 668                 // Now that we know exactly what we want to do, let's do it!
 669                 cur.selHandle(select);
 670                 cur.clearTargetX();
 671                 cur.macroModeClose();
 672                 // try moving forward or backwards as necessary...
 673                 if (!(forward ? cursorMathForward(cur) : cursorMathBackward(cur))) {
 674                         // ... and if movement failed, then finish forward or backwards
 675                         // as necessary
 676                         cmd = FuncRequest(finish_lfun);
 677                         cur.undispatched();
 678                 }
 679                 break;
 680         }
 681
 682         case LFUN_DOWN:
 683         case LFUN_UP:
 684                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 685         case LFUN_DOWN_SELECT:
 686         case LFUN_UP_SELECT: {
 687                 // close active macro
 688                 if (cur.inMacroMode()) {
 689                         cur.macroModeClose();
 690                         break;
 691                 }
 692
 693                 // stop/start the selection
 694                 bool select = act == LFUN_DOWN_SELECT ||
 695                         act == LFUN_UP_SELECT;
 696                 cur.selHandle(select);
 697
 698                 // go up/down
 699                 bool up = act == LFUN_UP || act == LFUN_UP_SELECT;
 700                 bool successful = cur.upDownInMath(up);
 701                 if (successful)
 702                         break;
 703
 704                 if (cur.fixIfBroken())
 705                         // FIXME: Something bad happened. We pass the corrected Cursor
 706                         // instead of letting things go worse.
 707                         break;
 708
 709                 // We did not manage to move the cursor.
 710                 cur.undispatched();
 711                 break;
 712         }
 713
 714         case LFUN_MOUSE_DOUBLE:
 715         case LFUN_MOUSE_TRIPLE:
 716         case LFUN_WORD_SELECT:
 717                 cur.pos() = 0;
 718                 cur.idx() = 0;
 719                 cur.resetAnchor();
 720                 cur.setSelection(true);
 721                 cur.pos() = cur.lastpos();
 722                 cur.idx() = cur.lastidx();
 723                 break;
 724
 725         case LFUN_PARAGRAPH_UP:
 726         case LFUN_PARAGRAPH_DOWN:
 727                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 728         case LFUN_PARAGRAPH_UP_SELECT:
 729         case LFUN_PARAGRAPH_DOWN_SELECT:
 730                 break;
 731
 732         case LFUN_LINE_BEGIN:
 733         case LFUN_WORD_BACKWARD:
 734         case LFUN_WORD_LEFT:
 735                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 736         case LFUN_LINE_BEGIN_SELECT:
 737         case LFUN_WORD_BACKWARD_SELECT:
 738         case LFUN_WORD_LEFT_SELECT:
 739                 cur.selHandle(act == LFUN_WORD_BACKWARD_SELECT ||
 740                                 act == LFUN_WORD_LEFT_SELECT ||
 741                                 act == LFUN_LINE_BEGIN_SELECT);
 742                 cur.macroModeClose();
 743                 if (cur.pos() != 0) {
 744                         cur.pos() = 0;
 745                 } else if (cur.col() != 0) {
 746                         cur.idx() -= cur.col();
 747                         cur.pos() = 0;
 748                 } else if (cur.idx() != 0) {
 749                         cur.idx() = 0;
 750                         cur.pos() = 0;
 751                 } else {
 752                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 753                         cur.undispatched();
 754                 }
 755                 break;
 756
 757         case LFUN_WORD_FORWARD:
 758         case LFUN_WORD_RIGHT:
 759         case LFUN_LINE_END:
 760                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 761         case LFUN_WORD_FORWARD_SELECT:
 762         case LFUN_WORD_RIGHT_SELECT:
 763         case LFUN_LINE_END_SELECT:
 764                 cur.selHandle(act == LFUN_WORD_FORWARD_SELECT ||
 765                                 act == LFUN_WORD_RIGHT_SELECT ||
 766                                 act == LFUN_LINE_END_SELECT);
 767                 cur.macroModeClose();
 768                 cur.clearTargetX();
 769                 if (cur.pos() != cur.lastpos()) {
 770                         cur.pos() = cur.lastpos();
 771                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 772                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 773                         cur.pos() = cur.lastpos();
 774                 } else if (cur.idx() != cur.lastidx()) {
 775                         cur.idx() = cur.lastidx();
 776                         cur.pos() = cur.lastpos();
 777                 } else {
 778                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 779                         cur.undispatched();
 780                 }
 781                 break;
 782
 783         case LFUN_CELL_FORWARD:
 784                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 785                 cur.inset().idxNext(cur);
 786                 break;
 787
 788         case LFUN_CELL_BACKWARD:
 789                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor);
 790                 cur.inset().idxPrev(cur);
 791                 break;
 792
 793         case LFUN_WORD_DELETE_BACKWARD:
 794         case LFUN_CHAR_DELETE_BACKWARD:
 795                 if (cur.pos() == 0)
 796                         // May affect external cell:
 797                         cur.recordUndoInset();
 798                 else
 799                         cur.recordUndoSelection();
 800                 // if the inset can not be removed from within, delete it
 801                 if (!cur.backspace()) {
 802                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 803                         cur.innerText()->dispatch(cur, cmd);
 804                 }
 805                 break;
 806
 807         case LFUN_WORD_DELETE_FORWARD:
 808         case LFUN_CHAR_DELETE_FORWARD:
 809                 if (cur.pos() == cur.lastpos())
 810                         // May affect external cell:
 811                         cur.recordUndoInset();
 812                 else
 813                         cur.recordUndoSelection();
 814                 // if the inset can not be removed from within, delete it
 815                 if (!cur.erase()) {
 816                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 817                         cur.innerText()->dispatch(cur, cmd);
 818                 }
 819                 break;
 820
 821         case LFUN_ESCAPE:
 822                 if (cur.selection())
 823                         cur.clearSelection();
 824                 else  {
 825                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 826                         cur.undispatched();
 827                 }
 828                 break;
 829
 830         // 'Locks' the math inset. A 'locked' math inset behaves as a unit
 831         // that is traversed by a single <CursorLeft>/<CursorRight>.
 832         case LFUN_INSET_TOGGLE:
 833                 cur.recordUndo();
 834                 lock(!lock());
 835                 cur.popForward();
 836                 break;
 837
 838         case LFUN_SELF_INSERT:
 839                 if (cmd.argument().size() != 1) {
 840                         cur.recordUndoSelection();
 841                         docstring const arg = cmd.argument();
 842                         if (!interpretString(cur, arg))
 843                                 cur.insert(arg);
 844                         break;
 845                 }
 846                 // Don't record undo steps if we are in macro mode and thus
 847                 // cmd.argument is the next character of the macro name.
 848                 // Otherwise we'll get an invalid cursor if we undo after
 849                 // the macro was finished and the macro is a known command,
 850                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 851                 // the InsetMathUnknown with name "frac" by an empty
 852                 // InsetMathFrac -> a pos value > 0 is invalid.
 853                 // A side effect is that an undo before the macro is finished
 854                 // undoes the complete macro, not only the last character.
 855                 // At the time we hit '\' we are not in macro mode, still.
 856                 if (!cur.inMacroMode())
 857                         cur.recordUndoSelection();
 858
 859                 // spacial handling of space. If we insert an inset
 860                 // via macro mode, we want to put the cursor inside it
 861                 // if relevant. Think typing "\frac<space>".
 862                 if (cmd.argument()[0] == ' '
 863                     && cur.inMacroMode() && cur.macroName() != "\\"
 864                     && cur.macroModeClose()) {
 865                         MathAtom const atom = cur.prevAtom();
 866                         if (atom->asNestInset() && atom->isActive()) {
 867                                 cur.posBackward();
 868                                 cur.pushBackward(*cur.nextInset());
 869                         }
 870                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 871                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 872                         cur.undispatched();
 873                 }
 874                 break;
 875
 876         //case LFUN_SERVER_GET_XY:
 877         //      break;
 878
 879         case LFUN_SERVER_SET_XY: {
 880                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 881                 int x = 0;
 882                 int y = 0;
 883                 istringstream is(to_utf8(cmd.argument()));
 884                 is >> x >> y;
 885                 cur.setScreenPos(x, y);
 886                 break;
 887         }
 888
 889         // Special casing for superscript in case of LyX handling
 890         // dead-keys:
 891         case LFUN_ACCENT_CIRCUMFLEX:
 892                 if (cmd.argument().empty()) {
 893                         // do superscript if LyX handles
 894                         // deadkeys
 895                         cur.recordUndoSelection();
 896                         script(cur, true, grabAndEraseSelection(cur));
 897                 }
 898                 break;
 899
 900         case LFUN_ACCENT_UMLAUT:
 901         case LFUN_ACCENT_ACUTE:
 902         case LFUN_ACCENT_GRAVE:
 903         case LFUN_ACCENT_BREVE:
 904         case LFUN_ACCENT_DOT:
 905         case LFUN_ACCENT_MACRON:
 906         case LFUN_ACCENT_CARON:
 907         case LFUN_ACCENT_TILDE:
 908         case LFUN_ACCENT_CEDILLA:
 909         case LFUN_ACCENT_CIRCLE:
 910         case LFUN_ACCENT_UNDERDOT:
 911         case LFUN_ACCENT_TIE:
 912         case LFUN_ACCENT_OGONEK:
 913         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 914                 break;
 915
 916         //  Math fonts
 917         case LFUN_TEXTSTYLE_APPLY:
 918         case LFUN_TEXTSTYLE_UPDATE:
 919                 handleFont2(cur, cmd.argument());
 920                 break;
 921
 922         case LFUN_FONT_BOLD:
 923                 if (currentMode() <= TEXT_MODE)
 924                         handleFont(cur, cmd.argument(), "textbf");
 925                 else
 926                         handleFont(cur, cmd.argument(), "mathbf");
 927                 break;
 928         case LFUN_FONT_BOLDSYMBOL:
 929                 if (currentMode() <= TEXT_MODE)
 930                         handleFont(cur, cmd.argument(), "textbf");
 931                 else
 932                         handleFont(cur, cmd.argument(), "boldsymbol");
 933                 break;
 934         case LFUN_FONT_SANS:
 935                 if (currentMode() <= TEXT_MODE)
 936                         handleFont(cur, cmd.argument(), "textsf");
 937                 else
 938                         handleFont(cur, cmd.argument(), "mathsf");
 939                 break;
 940         case LFUN_FONT_EMPH:
 941                 if (currentMode() <= TEXT_MODE)
 942                         handleFont(cur, cmd.argument(), "emph");
 943                 else
 944                         handleFont(cur, cmd.argument(), "mathcal");
 945                 break;
 946         case LFUN_FONT_ROMAN:
 947                 if (currentMode() <= TEXT_MODE)
 948                         handleFont(cur, cmd.argument(), "textrm");
 949                 else
 950                         handleFont(cur, cmd.argument(), "mathrm");
 951                 break;
 952         case LFUN_FONT_TYPEWRITER:
 953                 if (currentMode() <= TEXT_MODE)
 954                         handleFont(cur, cmd.argument(), "texttt");
 955                 else
 956                         handleFont(cur, cmd.argument(), "mathtt");
 957                 break;
 958         case LFUN_FONT_FRAK:
 959                 handleFont(cur, cmd.argument(), "mathfrak");
 960                 break;
 961         case LFUN_FONT_ITAL:
 962                 if (currentMode() <= TEXT_MODE)
 963                         handleFont(cur, cmd.argument(), "textit");
 964                 else
 965                         handleFont(cur, cmd.argument(), "mathit");
 966                 break;
 967         case LFUN_FONT_NOUN:
 968                 if (currentMode() <= TEXT_MODE)
 969                         // FIXME: should be "noun"
 970                         handleFont(cur, cmd.argument(), "textsc");
 971                 else
 972                         handleFont(cur, cmd.argument(), "mathbb");
 973                 break;
 974         case LFUN_FONT_DEFAULT:
 975                 handleFont(cur, cmd.argument(), "textnormal");
 976                 break;
 977
 978         case LFUN_FONT_UNDERLINE:
 979                 cur.recordUndo();
 980                 cur.handleNest(createInsetMath("underline", cur.buffer()));
 981                 break;
 982         case LFUN_MATH_MODE: {
 983 #if 1
 984                 // ignore math-mode on when already in math mode
 985                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 986                         break;
 987                 cur.recordUndoSelection();
 988                 cur.macroModeClose();
 989                 docstring const save_selection = grabAndEraseSelection(cur);
 990                 selClearOrDel(cur);
 991                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 992                 if (currentMode() <= Inset::TEXT_MODE)
 993                         cur.plainInsert(MathAtom(new InsetMathEnsureMath(buffer_)));
 994                 else
 995                         cur.plainInsert(MathAtom(new InsetMathBox(buffer_, from_ascii("mbox"))));
 996                 cur.posBackward();
 997                 cur.pushBackward(*cur.nextInset());
 998                 cur.niceInsert(save_selection);
 999                 cur.forceBufferUpdate();
1000 #else
1001                 if (currentMode() == Inset::TEXT_MODE) {
1002                         cur.recordUndoSelection();
1003                         cur.niceInsert(MathAtom(new InsetMathHull("simple", cur.buffer())));
1004                         cur.message(_("create new math text environment ($...$)"));
1005                 } else {
1006                         handleFont(cur, cmd.argument(), "textrm");
1007                         cur.message(_("entered math text mode (textrm)"));
1008                 }
1009 #endif
1010                 break;
1011         }
1012
1013         case LFUN_REGEXP_MODE: {
1014                 InsetMath * im = cur.inset().asInsetMath();
1015                 if (im) {
1016                         InsetMathHull * i = im->asHullInset();
1017                         if (i && i->getType() == hullRegexp) {
1018                                 cur.message(_("Already in regular expression mode"));
1019                                 break;
1020                         }
1021                 }
1022                 cur.macroModeClose();
1023                 docstring const save_selection = grabAndEraseSelection(cur);
1024                 selClearOrDel(cur);
1025                 cur.plainInsert(MathAtom(new InsetMathHull(buffer_, hullRegexp)));
1026                 cur.posBackward();
1027                 cur.pushBackward(*cur.nextInset());
1028                 cur.niceInsert(save_selection);
1029                 cur.message(_("Regular expression editor mode"));
1030                 break;
1031         }
1032
1033         case LFUN_MATH_FONT_STYLE: {
1034                 FuncRequest fr = FuncRequest(LFUN_MATH_INSERT, '\\' + cmd.argument());
1035                 doDispatch(cur, fr);
1036                 break;
1037         }
1038
1039         case LFUN_MATH_SIZE: {
1040                 FuncRequest fr = FuncRequest(LFUN_MATH_INSERT, cmd.argument());
1041                 doDispatch(cur, fr);
1042                 break;
1043         }
1044
1045         case LFUN_MATH_MATRIX: {
1046                 cur.recordUndo();
1047                 unsigned int m = 1;
1048                 unsigned int n = 1;
1049                 docstring v_align;
1050                 docstring h_align;
1051                 idocstringstream is(cmd.argument());
1052                 is >> m >> n >> v_align >> h_align;
1053                 if (m < 1)
1054                         m = 1;
1055                 if (n < 1)
1056                         n = 1;
1057                 v_align += 'c';
1058                 cur.niceInsert(MathAtom(new InsetMathArray(buffer_,
1059                         from_ascii("array"), m, n, (char)v_align[0], h_align)));
1060                 break;
1061         }
1062
1063         case LFUN_MATH_AMS_MATRIX: {
1064                 cur.recordUndo();
1065                 unsigned int m = 1;
1066                 unsigned int n = 1;
1067                 docstring name;
1068                 idocstringstream is(cmd.argument());
1069                 is >> m >> n >> name;
1070                 if (m < 1)
1071                         m = 1;
1072                 if (n < 1)
1073                         n = 1;
1074                 cur.niceInsert(
1075                         MathAtom(new InsetMathAMSArray(buffer_, name, m, n)));
1076                 break;
1077         }
1078
1079         case LFUN_MATH_DELIM: {
1080                 docstring ls;
1081                 docstring rs = split(cmd.argument(), ls, ' ');
1082                 // Reasonable default values
1083                 if (ls.empty())
1084                         ls = '(';
1085                 if (rs.empty())
1086                         rs = ')';
1087                 cur.recordUndo();
1088                 cur.handleNest(MathAtom(new InsetMathDelim(buffer_, ls, rs)));
1089                 break;
1090         }
1091
1092         case LFUN_MATH_BIGDELIM: {
1093                 docstring const lname  = from_utf8(cmd.getArg(0));
1094                 docstring const ldelim = from_utf8(cmd.getArg(1));
1095                 docstring const rname  = from_utf8(cmd.getArg(2));
1096                 docstring const rdelim = from_utf8(cmd.getArg(3));
1097                 latexkeys const * l = in_word_set(lname);
1098                 bool const have_l = l && l->inset == "big" &&
1099                                     InsetMathBig::isBigInsetDelim(ldelim);
1100                 l = in_word_set(rname);
1101                 bool const have_r = l && l->inset == "big" &&
1102                                     InsetMathBig::isBigInsetDelim(rdelim);
1103                 // We mimic LFUN_MATH_DELIM in case we have an empty left
1104                 // or right delimiter.
1105                 if (have_l || have_r) {
1106                         cur.recordUndo();
1107                         docstring const selection = grabAndEraseSelection(cur);
1108                         selClearOrDel(cur);
1109                         if (have_l)
1110                                 cur.insert(MathAtom(new InsetMathBig(lname,
1111                                                                 ldelim)));
1112                         // first insert the right delimiter and then go back
1113                         // and re-insert the selection (bug 7088)
1114                         if (have_r) {
1115                                 cur.insert(MathAtom(new InsetMathBig(rname,
1116                                                                 rdelim)));
1117                                 cur.posBackward();
1118                         }
1119                         cur.niceInsert(selection);
1120                 }
1121                 // Don't call cur.undispatched() if we did nothing, this would
1122                 // lead to infinite recursion via Text::dispatch().
1123                 break;
1124         }
1125
1126         case LFUN_SPACE_INSERT:
1127                 cur.recordUndoSelection();
1128                 cur.insert(MathAtom(new InsetMathSpace));
1129                 break;
1130
1131         case LFUN_MATH_SPACE:
1132                 cur.recordUndoSelection();
1133                 if (cmd.argument().empty())
1134                         cur.insert(MathAtom(new InsetMathSpace));
1135                 else {
1136                         string const name = cmd.getArg(0);
1137                         string const len = cmd.getArg(1);
1138                         cur.insert(MathAtom(new InsetMathSpace(name, len)));
1139                 }
1140                 break;
1141
1142         case LFUN_ERT_INSERT:
1143                 // interpret this as if a backslash was typed
1144                 cur.recordUndo();
1145                 interpretChar(cur, '\\');
1146                 break;
1147
1148         case LFUN_MATH_SUBSCRIPT:
1149                 // interpret this as if a _ was typed
1150                 cur.recordUndoSelection();
1151                 interpretChar(cur, '_');
1152                 break;
1153
1154         case LFUN_MATH_SUPERSCRIPT:
1155                 // interpret this as if a ^ was typed
1156                 cur.recordUndoSelection();
1157                 interpretChar(cur, '^');
1158                 break;
1159
1160         case LFUN_MATH_MACRO_FOLD:
1161         case LFUN_MATH_MACRO_UNFOLD: {
1162                 Cursor it = cur;
1163                 bool fold = act == LFUN_MATH_MACRO_FOLD;
1164                 bool found = findMacroToFoldUnfold(it, fold);
1165                 if (found) {
1166                         MathMacro * macro = it.nextInset()->asInsetMath()->asMacro();
1167                         cur.recordUndoInset();
1168                         if (fold)
1169                                 macro->fold(cur);
1170                         else
1171                                 macro->unfold(cur);
1172                 }
1173                 break;
1174         }
1175
1176         case LFUN_QUOTE_INSERT:
1177                 // interpret this as if a straight " was typed
1178                 cur.recordUndoSelection();
1179                 interpretChar(cur, '\"');
1180                 break;
1181
1182 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
1183 // handling such that "self-insert" works on "arbitrary stuff" too, and
1184 // math-insert only handles special math things like "matrix".
1185         case LFUN_MATH_INSERT: {
1186                 cur.recordUndoSelection();
1187                 if (cmd.argument() == "^" || cmd.argument() == "_")
1188                         interpretChar(cur, cmd.argument()[0]);
1189                 else {
1190                         MathData ar;
1191                         asArray(cmd.argument(), ar);
1192                         if (cur.selection() && ar.size() == 1
1193                             && ar[0]->asNestInset()
1194                             && ar[0]->asNestInset()->nargs() > 1)
1195                                 handleNest(cur, ar[0]);
1196                         else
1197                                 cur.niceInsert(cmd.argument());
1198                 }
1199                 break;
1200         }
1201
1202         case LFUN_UNICODE_INSERT: {
1203                 if (cmd.argument().empty())
1204                         break;
1205                 docstring hexstring = cmd.argument();
1206                 if (isHex(hexstring)) {
1207                         char_type c = hexToInt(hexstring);
1208                         if (c >= 32 && c < 0x10ffff) {
1209                                 docstring s = docstring(1, c);
1210                                 FuncCode code = currentMode() == MATH_MODE ?
1211                                         LFUN_MATH_INSERT : LFUN_SELF_INSERT;
1212                                 lyx::dispatch(FuncRequest(code, s));
1213                         }
1214                 }
1215                 break;
1216         }
1217
1218         case LFUN_DIALOG_SHOW_NEW_INSET: {
1219                 docstring const & name = cmd.argument();
1220                 string data;
1221                 if (name == "ref") {
1222                         InsetMathRef tmp(buffer_, name);
1223                         data = tmp.createDialogStr();
1224                         cur.bv().showDialog(to_utf8(name), data);
1225                 } else if (name == "mathspace") {
1226                         cur.bv().showDialog(to_utf8(name));
1227                 }
1228                 break;
1229         }
1230
1231         case LFUN_INSET_INSERT: {
1232                 MathData ar;
1233                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1234                         cur.recordUndoSelection();
1235                         cur.insert(ar);
1236                         cur.forceBufferUpdate();
1237                 } else
1238                         cur.undispatched();
1239                 break;
1240         }
1241         case LFUN_INSET_DISSOLVE:
1242                 if (!asHullInset()) {
1243                         cur.recordUndoInset();
1244                         cur.pullArg();
1245                 }
1246                 break;
1247
1248         default:
1249                 InsetMath::doDispatch(cur, cmd);
1250                 break;
1251         }
1252 }
1253
1254
1255 bool InsetMathNest::findMacroToFoldUnfold(Cursor & it, bool fold) const {
1256         // look for macro to open/close, but stay in mathed
1257         for (; !it.empty(); it.pop_back()) {
1258
1259                 // go backward through the current cell
1260                 Inset * inset = it.nextInset();
1261                 while (inset && inset->asInsetMath()) {
1262                         MathMacro * macro = inset->asInsetMath()->asMacro();
1263                         if (macro) {
1264                                 // found the an macro to open/close?
1265                                 if (macro->folded() != fold)
1266                                         return true;
1267
1268                                 // Wrong folding state.
1269                                 // If this was the first we see in this slice, look further left,
1270                                 // otherwise go up.
1271                                 if (inset != it.nextInset())
1272                                         break;
1273                         }
1274
1275                         // go up if this was the left most position
1276                         if (it.pos() == 0)
1277                                 break;
1278
1279                         // go left
1280                         it.pos()--;
1281                         inset = it.nextInset();
1282                 }
1283         }
1284
1285         return false;
1286 }
1287
1288
1289 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1290                 FuncStatus & flag) const
1291 {
1292         // the font related toggles
1293         //string tc = "mathnormal";
1294         bool ret = true;
1295         string const arg = to_utf8(cmd.argument());
1296         switch (cmd.action()) {
1297         case LFUN_INSET_MODIFY:
1298                 flag.setEnabled(false);
1299                 break;
1300 #if 0
1301         case LFUN_INSET_MODIFY:
1302                 // FIXME: check temporarily disabled
1303                 // valign code
1304                 char align = mathcursor::valign();
1305                 if (align == '\0') {
1306                         enable = false;
1307                         break;
1308                 }
1309                 if (cmd.argument().empty()) {
1310                         flag.clear();
1311                         break;
1312                 }
1313                 if (!contains("tcb", cmd.argument()[0])) {
1314                         enable = false;
1315                         break;
1316                 }
1317                 flag.setOnOff(cmd.argument()[0] == align);
1318                 break;
1319 #endif
1320         /// We have to handle them since 1.4 blocks all unhandled actions
1321         case LFUN_FONT_ITAL:
1322         case LFUN_FONT_BOLD:
1323         case LFUN_FONT_BOLDSYMBOL:
1324         case LFUN_FONT_SANS:
1325         case LFUN_FONT_EMPH:
1326         case LFUN_FONT_TYPEWRITER:
1327         case LFUN_FONT_NOUN:
1328         case LFUN_FONT_ROMAN:
1329         case LFUN_FONT_DEFAULT:
1330                 flag.setEnabled(true);
1331                 break;
1332
1333         // we just need to be in math mode to enable that
1334         case LFUN_MATH_SIZE:
1335         case LFUN_MATH_SPACE:
1336         case LFUN_MATH_LIMITS:
1337         case LFUN_MATH_EXTERN:
1338                 flag.setEnabled(true);
1339                 break;
1340
1341         case LFUN_FONT_UNDERLINE:
1342         case LFUN_FONT_FRAK:
1343                 flag.setEnabled(currentMode() != TEXT_MODE);
1344                 break;
1345
1346         case LFUN_MATH_FONT_STYLE: {
1347                 bool const textarg =
1348                         arg == "textbf"   || arg == "textsf" ||
1349                         arg == "textrm"   || arg == "textmd" ||
1350                         arg == "textit"   || arg == "textsc" ||
1351                         arg == "textsl"   || arg == "textup" ||
1352                         arg == "texttt"   || arg == "textbb" ||
1353                         arg == "textnormal";
1354                 flag.setEnabled(currentMode() != TEXT_MODE || textarg);
1355                 break;
1356         }
1357
1358         case LFUN_MATH_MODE:
1359                 // forbid "math-mode on" in math mode to prevent irritating
1360                 // behaviour of menu entries (bug 6709)
1361                 flag.setEnabled(currentMode() == TEXT_MODE || arg != "on");
1362                 break;
1363
1364         case LFUN_MATH_INSERT:
1365                 flag.setEnabled(currentMode() != TEXT_MODE);
1366                 break;
1367
1368         case LFUN_MATH_AMS_MATRIX:
1369         case LFUN_MATH_MATRIX:
1370                 flag.setEnabled(currentMode() == MATH_MODE);
1371                 break;
1372
1373         case LFUN_INSET_INSERT: {
1374                 // Don't test createMathInset_fromDialogStr(), since
1375                 // getStatus is not called with a valid reference and the
1376                 // dialog would not be applyable.
1377                 string const name = cmd.getArg(0);
1378                 flag.setEnabled(name == "ref" || name == "mathspace");
1379                 break;
1380         }
1381
1382         case LFUN_MATH_DELIM:
1383         case LFUN_MATH_BIGDELIM:
1384                 // Don't do this with multi-cell selections
1385                 flag.setEnabled(cur.selBegin().idx() == cur.selEnd().idx());
1386                 break;
1387
1388         case LFUN_MATH_MACRO_FOLD:
1389         case LFUN_MATH_MACRO_UNFOLD: {
1390                 Cursor it = cur;
1391                 bool found = findMacroToFoldUnfold(it, cmd.action() == LFUN_MATH_MACRO_FOLD);
1392                 flag.setEnabled(found);
1393                 break;
1394         }
1395
1396         case LFUN_SPECIALCHAR_INSERT:
1397         case LFUN_SCRIPT_INSERT:
1398                 // FIXME: These would probably make sense in math-text mode
1399                 flag.setEnabled(false);
1400                 break;
1401
1402         case LFUN_INSET_DISSOLVE:
1403                 flag.setEnabled(!asHullInset());
1404                 break;
1405
1406         default:
1407                 ret = false;
1408                 break;
1409         }
1410         return ret;
1411 }
1412
1413
1414 void InsetMathNest::edit(Cursor & cur, bool front, EntryDirection entry_from)
1415 {
1416         cur.push(*this);
1417         bool enter_front = (entry_from == Inset::ENTRY_DIRECTION_RIGHT ||
1418                 (entry_from == Inset::ENTRY_DIRECTION_IGNORE && front));
1419         cur.idx() = enter_front ? 0 : cur.lastidx();
1420         cur.pos() = enter_front ? 0 : cur.lastpos();
1421         cur.resetAnchor();
1422         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1423 }
1424
1425
1426 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1427 {
1428         int idx_min = 0;
1429         int dist_min = 1000000;
1430         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1431                 int const d = cell(i).dist(cur.bv(), x, y);
1432                 if (d < dist_min) {
1433                         dist_min = d;
1434                         idx_min = i;
1435                 }
1436         }
1437         MathData & ar = cell(idx_min);
1438         cur.push(*this);
1439         cur.idx() = idx_min;
1440         cur.pos() = ar.x2pos(&cur.bv(), x - ar.xo(cur.bv()));
1441
1442         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1443         if (dist_min == 0) {
1444                 // hit inside cell
1445                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1446                         if (ar[i]->covers(cur.bv(), x, y))
1447                                 return ar[i].nucleus()->editXY(cur, x, y);
1448         }
1449         return this;
1450 }
1451
1452
1453 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1454 {
1455         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1456         BufferView & bv = cur.bv();
1457         bool do_selection = cmd.button() == mouse_button::button1
1458                 && cmd.argument() == "region-select";
1459         bv.mouseSetCursor(cur, do_selection);
1460         if (cmd.button() == mouse_button::button1) {
1461                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1462                 // Update the cursor update flags as needed:
1463                 //
1464                 // Update::Decoration: tells to update the decoration
1465                 //                     (visual box corners that define
1466                 //                     the inset)/
1467                 // Update::FitCursor: adjust the screen to the cursor
1468                 //                    position if needed
1469                 // cur.result().update(): don't overwrite previously set flags.
1470                 cur.screenUpdateFlags(Update::Decoration | Update::FitCursor
1471                                 | cur.result().screenUpdate());
1472         } else if (cmd.button() == mouse_button::button2) {
1473                 if (cap::selection()) {
1474                         // See comment in Text::dispatch why we do this
1475                         cap::copySelectionToStack();
1476                         cmd = FuncRequest(LFUN_PASTE, "0");
1477                         doDispatch(bv.cursor(), cmd);
1478                 } else {
1479                         MathData ar;
1480                         asArray(theSelection().get(), ar);
1481                         bv.cursor().insert(ar);
1482                 }
1483         }
1484 }
1485
1486
1487 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1488 {
1489         // only select with button 1
1490         if (cmd.button() == mouse_button::button1) {
1491                 Cursor & bvcur = cur.bv().cursor();
1492                 if (bvcur.realAnchor().hasPart(cur)) {
1493                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1494                         bvcur.setCursor(cur);
1495                         bvcur.setSelection(true);
1496                         //lyxerr << "MOTION " << bvcur << endl;
1497                 } else
1498                         cur.undispatched();
1499         }
1500 }
1501
1502
1503 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1504 {
1505         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1506
1507         if (cmd.button() == mouse_button::button1) {
1508                 if (!cur.selection())
1509                         cur.noScreenUpdate();
1510                 else {
1511                         Cursor & bvcur = cur.bv().cursor();
1512                         bvcur.setSelection(true);
1513                 }
1514                 return;
1515         }
1516
1517         cur.undispatched();
1518 }
1519
1520
1521 bool InsetMathNest::interpretChar(Cursor & cur, char_type const c)
1522 {
1523         //lyxerr << "interpret 2: '" << c << "'" << endl;
1524         docstring save_selection;
1525         if (c == '^' || c == '_')
1526                 save_selection = grabAndEraseSelection(cur);
1527
1528         cur.clearTargetX();
1529         Buffer * buf = cur.buffer();
1530
1531         // handle macroMode
1532         if (cur.inMacroMode()) {
1533                 docstring name = cur.macroName();
1534
1535                 /// are we currently typing '#1' or '#2' or...?
1536                 if (name == "\\#") {
1537                         cur.backspace();
1538                         int n = c - '0';
1539                         if (n >= 1 && n <= 9)
1540                                 cur.insert(new MathMacroArgument(n));
1541                         return true;
1542                 }
1543
1544                 // do not finish macro for known * commands
1545                 MathWordList const & mwl = mathedWordList();
1546                 bool star_macro = c == '*'
1547                         && (mwl.find(name.substr(1) + "*") != mwl.end()
1548                             || cur.buffer()->getMacro(name.substr(1) + "*", cur, true));
1549                 if (isAlphaASCII(c) || star_macro) {
1550                         cur.activeMacro()->setName(name + docstring(1, c));
1551                         return true;
1552                 }
1553
1554                 // handle 'special char' macros
1555                 if (name == "\\") {
1556                         // remove the '\\'
1557                         if (c == '\\') {
1558                                 cur.backspace();
1559                                 if (currentMode() <= InsetMath::TEXT_MODE)
1560                                         cur.niceInsert(createInsetMath("textbackslash", buf));
1561                                 else
1562                                         cur.niceInsert(createInsetMath("backslash", buf));
1563                         } else if (c == '^' && currentMode() == InsetMath::MATH_MODE) {
1564                                 cur.backspace();
1565                                 cur.niceInsert(createInsetMath("mathcircumflex", buf));
1566                         } else if (c == '{') {
1567                                 cur.backspace();
1568                                 cur.niceInsert(MathAtom(new InsetMathBrace(buf)));
1569                         } else if (c == '%') {
1570                                 cur.backspace();
1571                                 cur.niceInsert(MathAtom(new InsetMathComment(buf)));
1572                         } else if (c == '#') {
1573                                 LASSERT(cur.activeMacro(), /**/);
1574                                 cur.activeMacro()->setName(name + docstring(1, c));
1575                         } else {
1576                                 cur.backspace();
1577                                 cur.niceInsert(createInsetMath(docstring(1, c), buf));
1578                         }
1579                         return true;
1580                 }
1581
1582                 // One character big delimiters. The others are handled in
1583                 // interpretString().
1584                 latexkeys const * l = in_word_set(name.substr(1));
1585                 if (name[0] == '\\' && l && l->inset == "big") {
1586                         docstring delim;
1587                         switch (c) {
1588                         case '{':
1589                                 delim = from_ascii("\\{");
1590                                 break;
1591                         case '}':
1592                                 delim = from_ascii("\\}");
1593                                 break;
1594                         default:
1595                                 delim = docstring(1, c);
1596                                 break;
1597                         }
1598                         if (InsetMathBig::isBigInsetDelim(delim)) {
1599                                 // name + delim ared a valid InsetMathBig.
1600                                 // We can't use cur.macroModeClose() because
1601                                 // it does not handle delim.
1602                                 InsetMathUnknown * p = cur.activeMacro();
1603                                 p->finalize();
1604                                 --cur.pos();
1605                                 cur.cell().erase(cur.pos());
1606                                 cur.plainInsert(MathAtom(
1607                                         new InsetMathBig(name.substr(1), delim)));
1608                                 return true;
1609                         }
1610                 }
1611
1612                 // leave macro mode and try again if necessary
1613                 if (cur.macroModeClose()) {
1614                         MathAtom const atom = cur.prevAtom();
1615                         if (atom->asNestInset() && atom->isActive()) {
1616                                 cur.posBackward();
1617                                 cur.pushBackward(*cur.nextInset());
1618                         }
1619                 }
1620                 if (c == '{')
1621                         cur.niceInsert(MathAtom(new InsetMathBrace(buf)));
1622                 else if (c != ' ')
1623                         interpretChar(cur, c);
1624                 return true;
1625         }
1626
1627
1628         // leave autocorrect mode if necessary
1629         if (lyxrc.autocorrection_math && c == ' ' && cur.autocorrect()) {
1630                 cur.autocorrect() = false;
1631                 cur.message(_("Autocorrect Off ('!' to enter)"));
1632                 return true;
1633         }
1634         if (lyxrc.autocorrection_math && c == '!' && !cur.autocorrect()) {
1635                 cur.autocorrect() = true;
1636                 cur.message(_("Autocorrect On (<space> to exit)"));
1637                 return true;
1638         }
1639
1640         // just clear selection on pressing the space bar
1641         if (cur.selection() && c == ' ') {
1642                 cur.setSelection(false);
1643                 return true;
1644         }
1645
1646         if (c == '\\') {
1647                 //lyxerr << "starting with macro" << endl;
1648                 bool reduced = cap::reduceSelectionToOneCell(cur);
1649                 if (reduced || !cur.selection()) {
1650                         docstring const safe = cap::grabAndEraseSelection(cur);
1651                         cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), safe, false)));
1652                 }
1653                 return true;
1654         }
1655
1656         selClearOrDel(cur);
1657
1658         if (c == '\n') {
1659                 if (currentMode() <= InsetMath::TEXT_MODE)
1660                         cur.insert(c);
1661                 return true;
1662         }
1663
1664         if (c == ' ') {
1665                 if (currentMode() <= InsetMath::TEXT_MODE) {
1666                         // insert spaces in text or undecided mode,
1667                         // but suppress direct insertion of two spaces in a row
1668                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1669                         // it is better than nothing...
1670                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1671                                 cur.insert(c);
1672                                 // FIXME: we have to enable full redraw here because of the
1673                                 // visual box corners that define the inset. If we know for
1674                                 // sure that we stay within the same cell we can optimize for
1675                                 // that using:
1676                                 //cur.screenUpdateFlags(Update::SinglePar | Update::FitCursor);
1677                         }
1678                         return true;
1679                 }
1680                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1681                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1682                         // FIXME: we have to enable full redraw here because of the
1683                         // visual box corners that define the inset. If we know for
1684                         // sure that we stay within the same cell we can optimize for
1685                         // that using:
1686                         //cur.screenUpdateFlags(Update::SinglePar | Update::FitCursor);
1687                         return true;
1688                 }
1689
1690                 if (cur.popForward()) {
1691                         // FIXME: we have to enable full redraw here because of the
1692                         // visual box corners that define the inset. If we know for
1693                         // sure that we stay within the same cell we can optimize for
1694                         // that using:
1695                         //cur.screenUpdateFlags(Update::FitCursor);
1696                         return true;
1697                 }
1698
1699                 // if we are at the very end, leave the formula
1700                 return cur.pos() != cur.lastpos();
1701         }
1702
1703         // These should be treated differently when not in text mode:
1704         if (currentMode() != InsetMath::TEXT_MODE) {
1705                 if (c == '_') {
1706                         script(cur, false, save_selection);
1707                         return true;
1708                 }
1709                 if (c == '^') {
1710                         script(cur, true, save_selection);
1711                         return true;
1712                 }
1713                 if (c == '~') {
1714                         cur.niceInsert(createInsetMath("sim", buf));
1715                         return true;
1716                 }
1717                 if (currentMode() == InsetMath::MATH_MODE && !isAsciiOrMathAlpha(c)) {
1718                         MathAtom at = createInsetMath("text", buf);
1719                         at.nucleus()->cell(0).push_back(MathAtom(new InsetMathChar(c)));
1720                         cur.niceInsert(at);
1721                         cur.posForward();
1722                         return true;
1723                 }
1724         } else {
1725                 if (c == '^') {
1726                         cur.niceInsert(createInsetMath("textasciicircum", buf));
1727                         return true;
1728                 }
1729                 if (c == '~') {
1730                         cur.niceInsert(createInsetMath("textasciitilde", buf));
1731                         return true;
1732                 }
1733         }
1734
1735         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1736             c == '%' || c == '_') {
1737                 cur.niceInsert(createInsetMath(docstring(1, c), buf));
1738                 return true;
1739         }
1740
1741
1742         // try auto-correction
1743         if (lyxrc.autocorrection_math && cur.autocorrect() && cur.pos() != 0
1744                   && math_autocorrect(cur.prevAtom(), c))
1745                 return true;
1746
1747         // no special circumstances, so insert the character without any fuss
1748         cur.insert(c);
1749         if (lyxrc.autocorrection_math) {
1750                 if (!cur.autocorrect())
1751                         cur.message(_("Autocorrect Off ('!' to enter)"));
1752                 else
1753                         cur.message(_("Autocorrect On (<space> to exit)"));
1754         }
1755         return true;
1756 }
1757
1758
1759 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1760 {
1761         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1762         // possible
1763         if (!cur.empty() && cur.pos() > 0 &&
1764             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1765                 if (InsetMathBig::isBigInsetDelim(str)) {
1766                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1767                         if (prev[0] == '\\') {
1768                                 prev = prev.substr(1);
1769                                 latexkeys const * l = in_word_set(prev);
1770                                 if (l && l->inset == "big") {
1771                                         cur.cell()[cur.pos() - 1] =
1772                                                 MathAtom(new InsetMathBig(prev, str));
1773                                         return true;
1774                                 }
1775                         }
1776                 }
1777         }
1778         return false;
1779 }
1780
1781
1782 bool InsetMathNest::script(Cursor & cur, bool up)
1783 {
1784         return script(cur, up, docstring());
1785 }
1786
1787
1788 bool InsetMathNest::script(Cursor & cur, bool up,
1789                 docstring const & save_selection)
1790 {
1791         // Hack to get \^ and \_ working
1792         //lyxerr << "handling script: up: " << up << endl;
1793         if (cur.inMacroMode() && cur.macroName() == "\\") {
1794                 if (up)
1795                         cur.niceInsert(createInsetMath("mathcircumflex", cur.buffer()));
1796                 else
1797                         interpretChar(cur, '_');
1798                 return true;
1799         }
1800
1801         cur.macroModeClose();
1802         if (asScriptInset() && cur.idx() == 0) {
1803                 // we are in a nucleus of a script inset, move to _our_ script
1804                 InsetMathScript * inset = asScriptInset();
1805                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1806                 inset->ensure(up);
1807                 cur.idx() = inset->idxOfScript(up);
1808                 cur.pos() = 0;
1809         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1810                 --cur.pos();
1811                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1812                 cur.push(*inset);
1813                 inset->ensure(up);
1814                 cur.idx() = inset->idxOfScript(up);
1815                 cur.pos() = cur.lastpos();
1816         } else {
1817                 // convert the thing to our left to a scriptinset or create a new
1818                 // one if in the very first position of the array
1819                 if (cur.pos() == 0) {
1820                         //lyxerr << "new scriptinset" << endl;
1821                         cur.insert(new InsetMathScript(buffer_, up));
1822                 } else {
1823                         //lyxerr << "converting prev atom " << endl;
1824                         cur.prevAtom() = MathAtom(new InsetMathScript(buffer_, cur.prevAtom(), up));
1825                 }
1826                 --cur.pos();
1827                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1828                 // See comment in MathParser.cpp for special handling of {}-bases
1829
1830                 cur.push(*inset);
1831                 cur.idx() = 1;
1832                 cur.pos() = 0;
1833         }
1834         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1835         cur.niceInsert(save_selection);
1836         cur.resetAnchor();
1837         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1838         return true;
1839 }
1840
1841
1842 bool InsetMathNest::completionSupported(Cursor const & cur) const
1843 {
1844         return cur.inMacroMode();
1845 }
1846
1847
1848 bool InsetMathNest::inlineCompletionSupported(Cursor const & cur) const
1849 {
1850         return cur.inMacroMode();
1851 }
1852
1853
1854 bool InsetMathNest::automaticInlineCompletion() const
1855 {
1856         return lyxrc.completion_inline_math;
1857 }
1858
1859
1860 bool InsetMathNest::automaticPopupCompletion() const
1861 {
1862         return lyxrc.completion_popup_math;
1863 }
1864
1865
1866 CompletionList const *
1867 InsetMathNest::createCompletionList(Cursor const & cur) const
1868 {
1869         if (!cur.inMacroMode())
1870                 return 0;
1871
1872         return new MathCompletionList(cur);
1873 }
1874
1875
1876 docstring InsetMathNest::completionPrefix(Cursor const & cur) const
1877 {
1878         if (!cur.inMacroMode())
1879                 return docstring();
1880
1881         return cur.activeMacro()->name();
1882 }
1883
1884
1885 bool InsetMathNest::insertCompletion(Cursor & cur, docstring const & s,
1886                                      bool finished)
1887 {
1888         if (!cur.inMacroMode())
1889                 return false;
1890
1891         // append completion to active macro
1892         InsetMathUnknown * inset = cur.activeMacro();
1893         inset->setName(inset->name() + s);
1894
1895         // finish macro
1896         if (finished) {
1897 #if 0
1898                 // FIXME: this creates duplicates in the completion popup
1899                 // which looks ugly. Moreover the changes the list lengths
1900                 // which seems to
1901                 confuse the popup as well.
1902                 MathCompletionList::addToFavorites(inset->name());
1903 #endif
1904                 lyx::dispatch(FuncRequest(LFUN_SELF_INSERT, " "));
1905         }
1906
1907         return true;
1908 }
1909
1910
1911 void InsetMathNest::completionPosAndDim(Cursor const & cur, int & x, int & y,
1912                                         Dimension & dim) const
1913 {
1914         Inset const * inset = cur.activeMacro();
1915         if (!inset)
1916                 return;
1917
1918         // get inset dimensions
1919         dim = cur.bv().coordCache().insets().dim(inset);
1920         // FIXME: these 3 are no accurate, but should depend on the font.
1921         // Now the popup jumps down if you enter a char with descent > 0.
1922         dim.des += 3;
1923         dim.asc += 3;
1924
1925         // and position
1926         Point xy = cur.bv().coordCache().insets().xy(inset);
1927         x = xy.x_;
1928         y = xy.y_;
1929 }
1930
1931
1932 bool InsetMathNest::cursorMathForward(Cursor & cur)
1933 {
1934         if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
1935                 cur.pushBackward(*cur.nextAtom().nucleus());
1936                 cur.inset().idxFirst(cur);
1937                 return true;
1938         }
1939         if (cur.posForward() || idxForward(cur))
1940                 return true;
1941         // try to pop forwards --- but don't pop out of math! leave that to
1942         // the FINISH lfuns
1943         int s = cur.depth() - 2;
1944         if (s >= 0 && cur[s].inset().asInsetMath())
1945                 return cur.popForward();
1946         return false;
1947 }
1948
1949
1950 bool InsetMathNest::cursorMathBackward(Cursor & cur)
1951 {
1952         if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
1953                 cur.posBackward();
1954                 cur.push(*cur.nextAtom().nucleus());
1955                 cur.inset().idxLast(cur);
1956                 return true;
1957         }
1958         if (cur.posBackward() || idxBackward(cur))
1959                 return true;
1960         // try to pop backwards --- but don't pop out of math! leave that to
1961         // the FINISH lfuns
1962         int s = cur.depth() - 2;
1963         if (s >= 0 && cur[s].inset().asInsetMath())
1964                 return cur.popBackward();
1965         return false;
1966 }
1967
1968
1969 ////////////////////////////////////////////////////////////////////
1970
1971 MathCompletionList::MathCompletionList(Cursor const & cur)
1972 {
1973         // fill it with macros from the buffer
1974         MacroNameSet macros;
1975         cur.buffer()->listMacroNames(macros);
1976         MacroNameSet::const_iterator it;
1977         for (it = macros.begin(); it != macros.end(); ++it) {
1978                 if (cur.buffer()->getMacro(*it, cur, false))
1979                         locals.push_back("\\" + *it);
1980         }
1981         sort(locals.begin(), locals.end());
1982
1983         if (globals.size() > 0)
1984                 return;
1985
1986         // fill in global macros
1987         macros.clear();
1988         MacroTable::globalMacros().getMacroNames(macros);
1989         //lyxerr << "Globals completion macros: ";
1990         for (it = macros.begin(); it != macros.end(); ++it) {
1991                 //lyxerr << "\\" + *it << " ";
1992                 globals.push_back("\\" + *it);
1993         }
1994         //lyxerr << std::endl;
1995
1996         // fill in global commands
1997         globals.push_back(from_ascii("\\boxed"));
1998         globals.push_back(from_ascii("\\fbox"));
1999         globals.push_back(from_ascii("\\framebox"));
2000         globals.push_back(from_ascii("\\makebox"));
2001         globals.push_back(from_ascii("\\kern"));
2002         globals.push_back(from_ascii("\\xrightarrow"));
2003         globals.push_back(from_ascii("\\xleftarrow"));
2004         globals.push_back(from_ascii("\\split"));
2005         globals.push_back(from_ascii("\\gathered"));
2006         globals.push_back(from_ascii("\\aligned"));
2007         globals.push_back(from_ascii("\\alignedat"));
2008         globals.push_back(from_ascii("\\cases"));
2009         globals.push_back(from_ascii("\\substack"));
2010         globals.push_back(from_ascii("\\xymatrix"));
2011         globals.push_back(from_ascii("\\Diagram"));
2012         globals.push_back(from_ascii("\\subarray"));
2013         globals.push_back(from_ascii("\\array"));
2014         globals.push_back(from_ascii("\\sqrt"));
2015         globals.push_back(from_ascii("\\root"));
2016         globals.push_back(from_ascii("\\tabular"));
2017         globals.push_back(from_ascii("\\stackrel"));
2018         globals.push_back(from_ascii("\\binom"));
2019         globals.push_back(from_ascii("\\choose"));
2020         globals.push_back(from_ascii("\\brace"));
2021         globals.push_back(from_ascii("\\brack"));
2022         globals.push_back(from_ascii("\\frac"));
2023         globals.push_back(from_ascii("\\over"));
2024         globals.push_back(from_ascii("\\nicefrac"));
2025         globals.push_back(from_ascii("\\unitfrac"));
2026         globals.push_back(from_ascii("\\unitfracthree"));
2027         globals.push_back(from_ascii("\\unitone"));
2028         globals.push_back(from_ascii("\\unittwo"));
2029         globals.push_back(from_ascii("\\infer"));
2030         globals.push_back(from_ascii("\\atop"));
2031         globals.push_back(from_ascii("\\lefteqn"));
2032         globals.push_back(from_ascii("\\boldsymbol"));
2033         globals.push_back(from_ascii("\\bm"));
2034         globals.push_back(from_ascii("\\color"));
2035         globals.push_back(from_ascii("\\normalcolor"));
2036         globals.push_back(from_ascii("\\textcolor"));
2037         globals.push_back(from_ascii("\\cfrac"));
2038         globals.push_back(from_ascii("\\cfracleft"));
2039         globals.push_back(from_ascii("\\cfracright"));
2040         globals.push_back(from_ascii("\\dfrac"));
2041         globals.push_back(from_ascii("\\tfrac"));
2042         globals.push_back(from_ascii("\\dbinom"));
2043         globals.push_back(from_ascii("\\tbinom"));
2044         globals.push_back(from_ascii("\\hphantom"));
2045         globals.push_back(from_ascii("\\phantom"));
2046         globals.push_back(from_ascii("\\vphantom"));
2047         MathWordList const & words = mathedWordList();
2048         MathWordList::const_iterator it2;
2049         //lyxerr << "Globals completion commands: ";
2050         for (it2 = words.begin(); it2 != words.end(); ++it2) {
2051                 globals.push_back("\\" + (*it2).first);
2052                 //lyxerr << "\\" + (*it2).first << " ";
2053         }
2054         //lyxerr << std::endl;
2055         sort(globals.begin(), globals.end());
2056 }
2057
2058
2059 MathCompletionList::~MathCompletionList()
2060 {
2061 }
2062
2063
2064 size_type MathCompletionList::size() const
2065 {
2066         return locals.size() + globals.size();
2067 }
2068
2069
2070 docstring const & MathCompletionList::data(size_t idx) const
2071 {
2072         size_t lsize = locals.size();
2073         if (idx >= lsize)
2074                 return globals[idx - lsize];
2075         else
2076                 return locals[idx];
2077 }
2078
2079
2080 std::string MathCompletionList::icon(size_t idx) const
2081 {
2082         // get the latex command
2083         docstring cmd;
2084         size_t lsize = locals.size();
2085         if (idx >= lsize)
2086                 cmd = globals[idx - lsize];
2087         else
2088                 cmd = locals[idx];
2089
2090         // get the icon resource name by stripping the backslash
2091         return "images/math/" + to_utf8(cmd.substr(1)) + ".png";
2092 }
2093
2094 std::vector<docstring> MathCompletionList::globals;
2095
2096 } // namespace lyx