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 "InsetMathBig.h"
  17 #include "InsetMathBox.h"
  18 #include "InsetMathBrace.h"
  19 #include "InsetMathColor.h"
  20 #include "InsetMathComment.h"
  21 #include "InsetMathDelim.h"
  22 #include "InsetMathHull.h"
  23 #include "InsetMathRef.h"
  24 #include "InsetMathScript.h"
  25 #include "InsetMathSpace.h"
  26 #include "InsetMathSymbol.h"
  27 #include "InsetMathUnknown.h"
  28 #include "MathData.h"
  29 #include "MathFactory.h"
  30 #include "MathMacro.h"
  31 #include "MathMacroArgument.h"
  32 #include "MathParser.h"
  33 #include "MathStream.h"
  34 #include "MathSupport.h"
  35
  36 #include "Bidi.h"
  37 #include "BufferView.h"
  38 #include "CoordCache.h"
  39 #include "Cursor.h"
  40 #include "CutAndPaste.h"
  41 #include "support/debug.h"
  42 #include "DispatchResult.h"
  43 #include "FuncRequest.h"
  44 #include "FuncStatus.h"
  45 #include "LyXFunc.h"
  46 #include "support/gettext.h"
  47 #include "Text.h"
  48 #include "OutputParams.h"
  49
  50 #include "support/lstrings.h"
  51 #include "support/textutils.h"
  52 #include "support/docstream.h"
  53
  54 #include "frontends/Clipboard.h"
  55 #include "frontends/Painter.h"
  56 #include "frontends/Selection.h"
  57
  58 #include "FuncRequest.h"
  59
  60 #include <sstream>
  61
  62 using namespace std;
  63
  64 namespace lyx {
  65
  66 using cap::copySelection;
  67 using cap::grabAndEraseSelection;
  68 using cap::cutSelection;
  69 using cap::replaceSelection;
  70 using cap::selClearOrDel;
  71
  72
  73 InsetMathNest::InsetMathNest(idx_type nargs)
  74         : cells_(nargs), lock_(false), mouse_hover_(false)
  75 {}
  76
  77
  78 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  79         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_),
  80           mouse_hover_(false)
  81 {}
  82
  83
  84 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  85 {
  86         cells_ = inset.cells_;
  87         lock_ = inset.lock_;
  88         mouse_hover_ = false;
  89         InsetMath::operator=(inset);
  90         return *this;
  91 }
  92
  93
  94 InsetMath::idx_type InsetMathNest::nargs() const
  95 {
  96         return cells_.size();
  97 }
  98
  99
 100 void InsetMathNest::cursorPos(BufferView const & bv,
 101                 CursorSlice const & sl, bool /*boundary*/,
 102                 int & x, int & y) const
 103 {
 104 // FIXME: This is a hack. Ideally, the coord cache should not store
 105 // absolute positions, but relative ones. This would mean to call
 106 // setXY() not in MathData::draw(), but in the parent insets' draw()
 107 // with the correctly adjusted x,y values. But this means that we'd have
 108 // to touch all (math)inset's draw() methods. Right now, we'll store
 109 // absolute value, and make them here relative, only to make them
 110 // absolute again when actually drawing the cursor. What a mess.
 111         BOOST_ASSERT(&sl.inset() == this);
 112         MathData const & ar = sl.cell();
 113         CoordCache const & coord_cache = bv.coordCache();
 114         if (!coord_cache.getArrays().has(&ar)) {
 115                 // this can (semi-)legally happen if we just created this cell
 116                 // and it never has been drawn before. So don't ASSERT.
 117                 //lyxerr << "no cached data for array " << &ar << endl;
 118                 x = 0;
 119                 y = 0;
 120                 return;
 121         }
 122         Point const pt = coord_cache.getArrays().xy(&ar);
 123         if (!coord_cache.getInsets().has(this)) {
 124                 // same as above
 125                 //lyxerr << "no cached data for inset " << this << endl;
 126                 x = 0;
 127                 y = 0;
 128                 return;
 129         }
 130         Point const pt2 = coord_cache.getInsets().xy(this);
 131         //lyxerr << "retrieving position cache for MathData "
 132         //      << pt.x_ << ' ' << pt.y_ << endl;
 133         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 134         y = pt.y_ - pt2.y_;
 135 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 136 //              << " asc: " << ascent() << "  des: " << descent()
 137 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 138         // move cursor visually into empty cells ("blue rectangles");
 139         if (ar.empty())
 140                 x += 2;
 141 }
 142
 143
 144 void InsetMathNest::metrics(MetricsInfo const & mi) const
 145 {
 146         MetricsInfo m = mi;
 147         for (idx_type i = 0, n = nargs(); i != n; ++i) {
 148                 Dimension dim;
 149                 cell(i).metrics(m, dim);
 150         }
 151 }
 152
 153
 154 bool InsetMathNest::idxNext(Cursor & cur) const
 155 {
 156         BOOST_ASSERT(&cur.inset() == this);
 157         if (cur.idx() == cur.lastidx())
 158                 return false;
 159         ++cur.idx();
 160         cur.pos() = 0;
 161         return true;
 162 }
 163
 164
 165 bool InsetMathNest::idxForward(Cursor & cur) const
 166 {
 167         return idxNext(cur);
 168 }
 169
 170
 171 bool InsetMathNest::idxPrev(Cursor & cur) const
 172 {
 173         BOOST_ASSERT(&cur.inset() == this);
 174         if (cur.idx() == 0)
 175                 return false;
 176         --cur.idx();
 177         cur.pos() = cur.lastpos();
 178         return true;
 179 }
 180
 181
 182 bool InsetMathNest::idxBackward(Cursor & cur) const
 183 {
 184         return idxPrev(cur);
 185 }
 186
 187
 188 bool InsetMathNest::idxFirst(Cursor & cur) const
 189 {
 190         BOOST_ASSERT(&cur.inset() == this);
 191         if (nargs() == 0)
 192                 return false;
 193         cur.idx() = 0;
 194         cur.pos() = 0;
 195         return true;
 196 }
 197
 198
 199 bool InsetMathNest::idxLast(Cursor & cur) const
 200 {
 201         BOOST_ASSERT(&cur.inset() == this);
 202         if (nargs() == 0)
 203                 return false;
 204         cur.idx() = cur.lastidx();
 205         cur.pos() = cur.lastpos();
 206         return true;
 207 }
 208
 209
 210 void InsetMathNest::dump() const
 211 {
 212         odocstringstream oss;
 213         WriteStream os(oss);
 214         os << "---------------------------------------------\n";
 215         write(os);
 216         os << "\n";
 217         for (idx_type i = 0, n = nargs(); i != n; ++i)
 218                 os << cell(i) << "\n";
 219         os << "---------------------------------------------\n";
 220         lyxerr << to_utf8(oss.str());
 221 }
 222
 223
 224 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 225 {
 226 #if 0
 227         if (lock_)
 228                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 229                                         Color_mathlockbg);
 230 #endif
 231         setPosCache(pi, x, y);
 232 }
 233
 234
 235 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 236 {
 237         BufferView & bv = *pi.base.bv;
 238         // this should use the x/y values given, not the cached values
 239         Cursor & cur = bv.cursor();
 240         if (!cur.selection())
 241                 return;
 242         if (&cur.inset() != this)
 243                 return;
 244
 245         // FIXME: hack to get position cache warm
 246         bool const original_drawing_state = pi.pain.isDrawingEnabled();
 247         pi.pain.setDrawingEnabled(false);
 248         draw(pi, x, y);
 249         pi.pain.setDrawingEnabled(original_drawing_state);
 250
 251         CursorSlice s1 = cur.selBegin();
 252         CursorSlice s2 = cur.selEnd();
 253
 254         //lyxerr << "InsetMathNest::drawing selection: "
 255         //      << " s1: " << s1 << " s2: " << s2 << endl;
 256         if (s1.idx() == s2.idx()) {
 257                 MathData const & c = cell(s1.idx());
 258                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 259                 int x1 = g.pos.x_ + c.pos2x(s1.pos());
 260                 int y1 = g.pos.y_ - g.dim.ascent();
 261                 int x2 = g.pos.x_ + c.pos2x(s2.pos());
 262                 int y2 = g.pos.y_ + g.dim.descent();
 263                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 264         //lyxerr << "InsetMathNest::drawing selection 3: "
 265         //      << " x1: " << x1 << " x2: " << x2
 266         //      << " y1: " << y1 << " y2: " << y2 << endl;
 267         } else {
 268                 for (idx_type i = 0; i < nargs(); ++i) {
 269                         if (idxBetween(i, s1.idx(), s2.idx())) {
 270                                 MathData const & c = cell(i);
 271                                 Geometry const & g = bv.coordCache().getArrays().geometry(&c);
 272                                 int x1 = g.pos.x_;
 273                                 int y1 = g.pos.y_ - g.dim.ascent();
 274                                 int x2 = g.pos.x_ + g.dim.width();
 275                                 int y2 = g.pos.y_ + g.dim.descent();
 276                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color_selection);
 277                         }
 278                 }
 279         }
 280 }
 281
 282
 283 void InsetMathNest::validate(LaTeXFeatures & features) const
 284 {
 285         for (idx_type i = 0; i < nargs(); ++i)
 286                 cell(i).validate(features);
 287 }
 288
 289
 290 void InsetMathNest::replace(ReplaceData & rep)
 291 {
 292         for (idx_type i = 0; i < nargs(); ++i)
 293                 cell(i).replace(rep);
 294 }
 295
 296
 297 bool InsetMathNest::contains(MathData const & ar) const
 298 {
 299         for (idx_type i = 0; i < nargs(); ++i)
 300                 if (cell(i).contains(ar))
 301                         return true;
 302         return false;
 303 }
 304
 305
 306 bool InsetMathNest::lock() const
 307 {
 308         return lock_;
 309 }
 310
 311
 312 void InsetMathNest::lock(bool l)
 313 {
 314         lock_ = l;
 315 }
 316
 317
 318 bool InsetMathNest::isActive() const
 319 {
 320         return nargs() > 0;
 321 }
 322
 323
 324 MathData InsetMathNest::glue() const
 325 {
 326         MathData ar;
 327         for (size_t i = 0; i < nargs(); ++i)
 328                 ar.append(cell(i));
 329         return ar;
 330 }
 331
 332
 333 void InsetMathNest::write(WriteStream & os) const
 334 {
 335         os << '\\' << name().c_str();
 336         for (size_t i = 0; i < nargs(); ++i)
 337                 os << '{' << cell(i) << '}';
 338         if (nargs() == 0)
 339                 os.pendingSpace(true);
 340         if (lock_ && !os.latex()) {
 341                 os << "\\lyxlock";
 342                 os.pendingSpace(true);
 343         }
 344 }
 345
 346
 347 void InsetMathNest::normalize(NormalStream & os) const
 348 {
 349         os << '[' << name().c_str();
 350         for (size_t i = 0; i < nargs(); ++i)
 351                 os << ' ' << cell(i);
 352         os << ']';
 353 }
 354
 355
 356 int InsetMathNest::latex(Buffer const &, odocstream & os,
 357                         OutputParams const & runparams) const
 358 {
 359         WriteStream wi(os, runparams.moving_arg, true);
 360         write(wi);
 361         return wi.line();
 362 }
 363
 364
 365 bool InsetMathNest::setMouseHover(bool mouse_hover)
 366 {
 367         mouse_hover_ = mouse_hover;
 368         return true;
 369 }
 370
 371
 372 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 373 {
 374         // FIXME: look here
 375 #if 0
 376         MathData & ar = cur.cell();
 377         // remove base-only "scripts"
 378         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 379                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 380                 if (p && p->nargs() == 1) {
 381                         MathData ar = p->nuc();
 382                         erase(i);
 383                         insert(i, ar);
 384                         cur.adjust(i, ar.size() - 1);
 385                 }
 386         }
 387
 388         // glue adjacent font insets of the same kind
 389         for (pos_type i = 0; i + 1 < size(); ++i) {
 390                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 391                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 392                 if (p && q && p->name() == q->name()) {
 393                         p->cell(0).append(q->cell(0));
 394                         erase(i + 1);
 395                         cur.adjust(i, -1);
 396                 }
 397         }
 398 #endif
 399         return false;
 400 }
 401
 402
 403 void InsetMathNest::handleFont
 404         (Cursor & cur, docstring const & arg, char const * const font)
 405 {
 406         handleFont(cur, arg, from_ascii(font));
 407 }
 408
 409
 410 void InsetMathNest::handleFont
 411         (Cursor & cur, docstring const & arg, docstring const & font)
 412 {
 413         // this whole function is a hack and won't work for incremental font
 414         // changes...
 415
 416         if (cur.inset().asInsetMath()->name() == font) {
 417                 cur.recordUndoInset();
 418                 cur.handleFont(to_utf8(font));
 419         } else {
 420                 cur.recordUndo();
 421                 cur.handleNest(createInsetMath(font));
 422                 cur.insert(arg);
 423         }
 424 }
 425
 426
 427 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 428 {
 429         cur.recordUndo();
 430         Font font;
 431         bool b;
 432         font.fromString(to_utf8(arg), b);
 433         if (font.fontInfo().color() != Color_inherit) {
 434                 MathAtom at = MathAtom(new InsetMathColor(true, font.fontInfo().color()));
 435                 cur.handleNest(at, 0);
 436         }
 437 }
 438
 439
 440 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 441 {
 442         //lyxerr << "InsetMathNest: request: " << cmd << endl;
 443         //CursorSlice sl = cur.current();
 444
 445         switch (cmd.action) {
 446
 447         case LFUN_PASTE: {
 448                 cur.recordUndo();
 449                 cur.message(_("Paste"));
 450                 replaceSelection(cur);
 451                 docstring topaste;
 452                 if (cmd.argument().empty() && !theClipboard().isInternal())
 453                         topaste = theClipboard().getAsText();
 454                 else {
 455                         size_t n = 0;
 456                         idocstringstream is(cmd.argument());
 457                         is >> n;
 458                         topaste = cap::getSelection(cur.buffer(), n);
 459                 }
 460                 cur.niceInsert(topaste);
 461                 cur.clearSelection(); // bug 393
 462                 cur.finishUndo();
 463                 break;
 464         }
 465
 466         case LFUN_CUT:
 467                 cur.recordUndo();
 468                 cutSelection(cur, true, true);
 469                 cur.message(_("Cut"));
 470                 // Prevent stale position >= size crash
 471                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 472                 cur.normalize();
 473                 break;
 474
 475         case LFUN_COPY:
 476                 copySelection(cur);
 477                 cur.message(_("Copy"));
 478                 break;
 479
 480         case LFUN_MOUSE_PRESS:
 481                 lfunMousePress(cur, cmd);
 482                 break;
 483
 484         case LFUN_MOUSE_MOTION:
 485                 lfunMouseMotion(cur, cmd);
 486                 break;
 487
 488         case LFUN_MOUSE_RELEASE:
 489                 lfunMouseRelease(cur, cmd);
 490                 break;
 491
 492         case LFUN_FINISHED_BACKWARD:
 493                 cur.bv().cursor() = cur;
 494                 break;
 495
 496         case LFUN_FINISHED_FORWARD:
 497                 ++cur.pos();
 498                 cur.bv().cursor() = cur;
 499                 break;
 500
 501         case LFUN_CHAR_FORWARD:
 502                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 503         case LFUN_CHAR_FORWARD_SELECT:
 504                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 505                 cur.autocorrect() = false;
 506                 cur.clearTargetX();
 507                 cur.macroModeClose();
 508                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 509                         cur.pushBackward(*cur.nextAtom().nucleus());
 510                         cur.inset().idxFirst(cur);
 511                 } else if (cur.posForward() || idxForward(cur)
 512                         || cur.popForward() || cur.selection())
 513                         ;
 514                 else {
 515                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 516                         cur.undispatched();
 517                 }
 518                 break;
 519
 520         case LFUN_CHAR_BACKWARD:
 521                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 522         case LFUN_CHAR_BACKWARD_SELECT:
 523                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 524                 cur.autocorrect() = false;
 525                 cur.clearTargetX();
 526                 cur.macroModeClose();
 527                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 528                         cur.posBackward();
 529                         cur.push(*cur.nextAtom().nucleus());
 530                         cur.inset().idxLast(cur);
 531                 } else if (cur.posBackward() || idxBackward(cur)
 532                         || cur.popBackward() || cur.selection())
 533                         ;
 534                 else {
 535                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 536                         cur.undispatched();
 537                 }
 538                 break;
 539
 540         case LFUN_CHAR_RIGHT:
 541         case LFUN_CHAR_RIGHT_SELECT:
 542                 //FIXME: for visual cursor, really move right
 543                 if (reverseDirectionNeeded(cur))
 544                         cmd.action = cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 545                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD;
 546                 else
 547                         cmd.action = cmd.action == LFUN_CHAR_RIGHT_SELECT ?
 548                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD;
 549                 doDispatch(cur, cmd);
 550                 break;
 551
 552         case LFUN_CHAR_LEFT:
 553         case LFUN_CHAR_LEFT_SELECT:
 554                 //FIXME: for visual cursor, really move left
 555                 if (reverseDirectionNeeded(cur))
 556                         cmd.action = cmd.action == LFUN_CHAR_LEFT_SELECT ?
 557                                         LFUN_CHAR_FORWARD_SELECT : LFUN_CHAR_FORWARD;
 558                 else
 559                         cmd.action = cmd.action == LFUN_CHAR_LEFT_SELECT ?
 560                                         LFUN_CHAR_BACKWARD_SELECT : LFUN_CHAR_BACKWARD;
 561                 doDispatch(cur, cmd);
 562                 break;
 563
 564         case LFUN_DOWN:
 565         case LFUN_UP:
 566                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 567         case LFUN_DOWN_SELECT:
 568         case LFUN_UP_SELECT: {
 569                 // close active macro
 570                 if (cur.inMacroMode()) {
 571                         cur.macroModeClose();
 572                         break;
 573                 }
 574
 575                 // stop/start the selection
 576                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 577                         cmd.action == LFUN_UP_SELECT;
 578                 cur.selHandle(select);
 579
 580                 // go up/down
 581                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 582                 bool successful = cur.upDownInMath(up);
 583                 if (successful) {
 584                         // notify left insets and give them chance to set update flags
 585                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 586                         cur.fixIfBroken();
 587                         break;
 588                 }
 589
 590                 if (cur.fixIfBroken())
 591                         // FIXME: Something bad happened. We pass the corrected Cursor
 592                         // instead of letting things go worse.
 593                         break;
 594
 595                 // We did not manage to move the cursor.
 596                 cur.undispatched();
 597                 break;
 598         }
 599
 600         case LFUN_MOUSE_DOUBLE:
 601         case LFUN_MOUSE_TRIPLE:
 602         case LFUN_WORD_SELECT:
 603                 cur.pos() = 0;
 604                 cur.idx() = 0;
 605                 cur.resetAnchor();
 606                 cur.selection() = true;
 607                 cur.pos() = cur.lastpos();
 608                 cur.idx() = cur.lastidx();
 609                 break;
 610
 611         case LFUN_PARAGRAPH_UP:
 612         case LFUN_PARAGRAPH_DOWN:
 613                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 614         case LFUN_PARAGRAPH_UP_SELECT:
 615         case LFUN_PARAGRAPH_DOWN_SELECT:
 616                 break;
 617
 618         case LFUN_LINE_BEGIN:
 619         case LFUN_WORD_BACKWARD:
 620         case LFUN_WORD_LEFT:
 621                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 622         case LFUN_LINE_BEGIN_SELECT:
 623         case LFUN_WORD_BACKWARD_SELECT:
 624         case LFUN_WORD_LEFT_SELECT:
 625                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 626                                 cmd.action == LFUN_WORD_LEFT_SELECT ||
 627                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 628                 cur.macroModeClose();
 629                 if (cur.pos() != 0) {
 630                         cur.pos() = 0;
 631                 } else if (cur.col() != 0) {
 632                         cur.idx() -= cur.col();
 633                         cur.pos() = 0;
 634                 } else if (cur.idx() != 0) {
 635                         cur.idx() = 0;
 636                         cur.pos() = 0;
 637                 } else {
 638                         cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 639                         cur.undispatched();
 640                 }
 641                 break;
 642
 643         case LFUN_WORD_FORWARD:
 644         case LFUN_WORD_RIGHT:
 645         case LFUN_LINE_END:
 646                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 647         case LFUN_WORD_FORWARD_SELECT:
 648         case LFUN_WORD_RIGHT_SELECT:
 649         case LFUN_LINE_END_SELECT:
 650                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 651                                 cmd.action == LFUN_WORD_RIGHT_SELECT ||
 652                                 cmd.action == LFUN_LINE_END_SELECT);
 653                 cur.macroModeClose();
 654                 cur.clearTargetX();
 655                 if (cur.pos() != cur.lastpos()) {
 656                         cur.pos() = cur.lastpos();
 657                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 658                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 659                         cur.pos() = cur.lastpos();
 660                 } else if (cur.idx() != cur.lastidx()) {
 661                         cur.idx() = cur.lastidx();
 662                         cur.pos() = cur.lastpos();
 663                 } else {
 664                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 665                         cur.undispatched();
 666                 }
 667                 break;
 668
 669         case LFUN_SCREEN_UP_SELECT:
 670                 cmd = FuncRequest(LFUN_FINISHED_BACKWARD);
 671                 cur.undispatched();
 672                 break;
 673
 674         case LFUN_SCREEN_DOWN_SELECT:
 675                 cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 676                 cur.undispatched();
 677                 break;
 678
 679         case LFUN_CELL_FORWARD:
 680                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 681                 cur.inset().idxNext(cur);
 682                 break;
 683
 684         case LFUN_CELL_BACKWARD:
 685                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 686                 cur.inset().idxPrev(cur);
 687                 break;
 688
 689         case LFUN_WORD_DELETE_BACKWARD:
 690         case LFUN_CHAR_DELETE_BACKWARD:
 691                 if (cur.pos() == 0)
 692                         // May affect external cell:
 693                         cur.recordUndoInset();
 694                 else
 695                         cur.recordUndo();
 696                 // if the inset can not be removed from within, delete it
 697                 if (!cur.backspace()) {
 698                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 699                         cur.innerText()->dispatch(cur, cmd);
 700                 }
 701                 break;
 702
 703         case LFUN_WORD_DELETE_FORWARD:
 704         case LFUN_CHAR_DELETE_FORWARD:
 705                 if (cur.pos() == cur.lastpos())
 706                         // May affect external cell:
 707                         cur.recordUndoInset();
 708                 else
 709                         cur.recordUndo();
 710                 // if the inset can not be removed from within, delete it
 711                 if (!cur.erase()) {
 712                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 713                         cur.innerText()->dispatch(cur, cmd);
 714                 }
 715                 break;
 716
 717         case LFUN_ESCAPE:
 718                 if (cur.selection())
 719                         cur.clearSelection();
 720                 else  {
 721                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 722                         cur.undispatched();
 723                 }
 724                 break;
 725
 726         // 'Locks' the math inset. A 'locked' math inset behaves as a unit
 727         // that is traversed by a single <CursorLeft>/<CursorRight>.
 728         case LFUN_INSET_TOGGLE:
 729                 cur.recordUndo();
 730                 lock(!lock());
 731                 cur.popForward();
 732                 break;
 733
 734         case LFUN_SELF_INSERT:
 735                 if (cmd.argument().size() != 1) {
 736                         cur.recordUndo();
 737                         docstring const arg = cmd.argument();
 738                         if (!interpretString(cur, arg))
 739                                 cur.insert(arg);
 740                         break;
 741                 }
 742                 // Don't record undo steps if we are in macro mode and
 743                 // cmd.argument is the next character of the macro name.
 744                 // Otherwise we'll get an invalid cursor if we undo after
 745                 // the macro was finished and the macro is a known command,
 746                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 747                 // the InsetMathUnknown with name "frac" by an empty
 748                 // InsetMathFrac -> a pos value > 0 is invalid.
 749                 // A side effect is that an undo before the macro is finished
 750                 // undoes the complete macro, not only the last character.
 751                 if (!cur.inMacroMode())
 752                         cur.recordUndo();
 753
 754                 // spacial handling of space. If we insert an inset
 755                 // via macro mode, we want to put the cursor inside it
 756                 // if relevant. Think typing "\frac<space>".
 757                 if (cmd.argument()[0] == ' '
 758                     && cur.inMacroMode() && cur.macroName() != "\\"
 759                     && cur.macroModeClose()) {
 760                         MathAtom const atom = cur.prevAtom();
 761                         if (atom->asNestInset() && atom->isActive()) {
 762                                 cur.posBackward();
 763                                 cur.pushBackward(*cur.nextInset());
 764                         }
 765                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 766                         cmd = FuncRequest(LFUN_FINISHED_FORWARD);
 767                         cur.undispatched();
 768                 }
 769                 break;
 770
 771         //case LFUN_SERVER_GET_XY:
 772         //      sprintf(dispatch_buffer, "%d %d",);
 773         //      break;
 774
 775         case LFUN_SERVER_SET_XY: {
 776                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 777                 int x = 0;
 778                 int y = 0;
 779                 istringstream is(to_utf8(cmd.argument()));
 780                 is >> x >> y;
 781                 cur.setScreenPos(x, y);
 782                 break;
 783         }
 784
 785         // Special casing for superscript in case of LyX handling
 786         // dead-keys:
 787         case LFUN_ACCENT_CIRCUMFLEX:
 788                 if (cmd.argument().empty()) {
 789                         // do superscript if LyX handles
 790                         // deadkeys
 791                         cur.recordUndo();
 792                         script(cur, true, grabAndEraseSelection(cur));
 793                 }
 794                 break;
 795
 796         case LFUN_ACCENT_UMLAUT:
 797         case LFUN_ACCENT_ACUTE:
 798         case LFUN_ACCENT_GRAVE:
 799         case LFUN_ACCENT_BREVE:
 800         case LFUN_ACCENT_DOT:
 801         case LFUN_ACCENT_MACRON:
 802         case LFUN_ACCENT_CARON:
 803         case LFUN_ACCENT_TILDE:
 804         case LFUN_ACCENT_CEDILLA:
 805         case LFUN_ACCENT_CIRCLE:
 806         case LFUN_ACCENT_UNDERDOT:
 807         case LFUN_ACCENT_TIE:
 808         case LFUN_ACCENT_OGONEK:
 809         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 810                 break;
 811
 812         //  Math fonts
 813         case LFUN_FONT_FREE_APPLY:
 814         case LFUN_FONT_FREE_UPDATE:
 815                 handleFont2(cur, cmd.argument());
 816                 break;
 817
 818         case LFUN_FONT_BOLD:
 819                 if (currentMode() == TEXT_MODE)
 820                         handleFont(cur, cmd.argument(), "textbf");
 821                 else
 822                         handleFont(cur, cmd.argument(), "mathbf");
 823                 break;
 824         case LFUN_FONT_SANS:
 825                 if (currentMode() == TEXT_MODE)
 826                         handleFont(cur, cmd.argument(), "textsf");
 827                 else
 828                         handleFont(cur, cmd.argument(), "mathsf");
 829                 break;
 830         case LFUN_FONT_EMPH:
 831                 if (currentMode() == TEXT_MODE)
 832                         handleFont(cur, cmd.argument(), "emph");
 833                 else
 834                         handleFont(cur, cmd.argument(), "mathcal");
 835                 break;
 836         case LFUN_FONT_ROMAN:
 837                 if (currentMode() == TEXT_MODE)
 838                         handleFont(cur, cmd.argument(), "textrm");
 839                 else
 840                         handleFont(cur, cmd.argument(), "mathrm");
 841                 break;
 842         case LFUN_FONT_TYPEWRITER:
 843                 if (currentMode() == TEXT_MODE)
 844                         handleFont(cur, cmd.argument(), "texttt");
 845                 else
 846                         handleFont(cur, cmd.argument(), "mathtt");
 847                 break;
 848         case LFUN_FONT_FRAK:
 849                 handleFont(cur, cmd.argument(), "mathfrak");
 850                 break;
 851         case LFUN_FONT_ITAL:
 852                 if (currentMode() == TEXT_MODE)
 853                         handleFont(cur, cmd.argument(), "textit");
 854                 else
 855                         handleFont(cur, cmd.argument(), "mathit");
 856                 break;
 857         case LFUN_FONT_NOUN:
 858                 if (currentMode() == TEXT_MODE)
 859                         // FIXME: should be "noun"
 860                         handleFont(cur, cmd.argument(), "textsc");
 861                 else
 862                         handleFont(cur, cmd.argument(), "mathbb");
 863                 break;
 864         /*
 865         case LFUN_FONT_FREE_APPLY:
 866                 handleFont(cur, cmd.argument(), "textrm");
 867                 break;
 868         */
 869         case LFUN_FONT_DEFAULT:
 870                 handleFont(cur, cmd.argument(), "textnormal");
 871                 break;
 872
 873         case LFUN_MATH_MODE: {
 874 #if 1
 875                 // ignore math-mode on when already in math mode
 876                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 877                         break;
 878                 cur.macroModeClose();
 879                 docstring const save_selection = grabAndEraseSelection(cur);
 880                 selClearOrDel(cur);
 881                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 882                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 883                 cur.posBackward();
 884                 cur.pushBackward(*cur.nextInset());
 885                 cur.niceInsert(save_selection);
 886 #else
 887                 if (currentMode() == Inset::TEXT_MODE) {
 888                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 889                         cur.message(_("create new math text environment ($...$)"));
 890                 } else {
 891                         handleFont(cur, cmd.argument(), "textrm");
 892                         cur.message(_("entered math text mode (textrm)"));
 893                 }
 894 #endif
 895                 break;
 896         }
 897
 898         case LFUN_MATH_SIZE:
 899 #if 0
 900                 cur.recordUndo();
 901                 cur.setSize(arg);
 902 #endif
 903                 break;
 904
 905         case LFUN_MATH_MATRIX: {
 906                 cur.recordUndo();
 907                 unsigned int m = 1;
 908                 unsigned int n = 1;
 909                 docstring v_align;
 910                 docstring h_align;
 911                 idocstringstream is(cmd.argument());
 912                 is >> m >> n >> v_align >> h_align;
 913                 if (m < 1)
 914                         m = 1;
 915                 if (n < 1)
 916                         n = 1;
 917                 v_align += 'c';
 918                 cur.niceInsert(
 919                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 920                 break;
 921         }
 922
 923         case LFUN_MATH_DELIM: {
 924                 docstring ls;
 925                 docstring rs = support::split(cmd.argument(), ls, ' ');
 926                 // Reasonable default values
 927                 if (ls.empty())
 928                         ls = '(';
 929                 if (rs.empty())
 930                         rs = ')';
 931                 cur.recordUndo();
 932                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 933                 break;
 934         }
 935
 936         case LFUN_MATH_BIGDELIM: {
 937                 docstring const lname  = from_utf8(cmd.getArg(0));
 938                 docstring const ldelim = from_utf8(cmd.getArg(1));
 939                 docstring const rname  = from_utf8(cmd.getArg(2));
 940                 docstring const rdelim = from_utf8(cmd.getArg(3));
 941                 latexkeys const * l = in_word_set(lname);
 942                 bool const have_l = l && l->inset == "big" &&
 943                                     InsetMathBig::isBigInsetDelim(ldelim);
 944                 l = in_word_set(rname);
 945                 bool const have_r = l && l->inset == "big" &&
 946                                     InsetMathBig::isBigInsetDelim(rdelim);
 947                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 948                 // or right delimiter.
 949                 if (have_l || have_r) {
 950                         cur.recordUndo();
 951                         docstring const selection = grabAndEraseSelection(cur);
 952                         selClearOrDel(cur);
 953                         if (have_l)
 954                                 cur.insert(MathAtom(new InsetMathBig(lname,
 955                                                                 ldelim)));
 956                         cur.niceInsert(selection);
 957                         if (have_r)
 958                                 cur.insert(MathAtom(new InsetMathBig(rname,
 959                                                                 rdelim)));
 960                 }
 961                 // Don't call cur.undispatched() if we did nothing, this would
 962                 // lead to infinite recursion via Text::dispatch().
 963                 break;
 964         }
 965
 966         case LFUN_SPACE_INSERT:
 967         case LFUN_MATH_SPACE:
 968                 cur.recordUndo();
 969                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 970                 break;
 971
 972         case LFUN_ERT_INSERT:
 973                 // interpret this as if a backslash was typed
 974                 cur.recordUndo();
 975                 interpretChar(cur, '\\');
 976                 break;
 977
 978         case LFUN_MATH_SUBSCRIPT:
 979                 // interpret this as if a _ was typed
 980                 cur.recordUndo();
 981                 interpretChar(cur, '_');
 982                 break;
 983
 984         case LFUN_MATH_SUPERSCRIPT:
 985                 // interpret this as if a ^ was typed
 986                 cur.recordUndo();
 987                 interpretChar(cur, '^');
 988                 break;
 989
 990         case LFUN_MATH_MACRO_FOLD:
 991         case LFUN_MATH_MACRO_UNFOLD: {
 992                 Cursor it = cur;
 993                 bool fold = cmd.action == LFUN_MATH_MACRO_FOLD;
 994                 bool found = findMacroToFoldUnfold(it, fold);
 995                 if (found) {
 996                         cur.recordUndo();
 997                         if (fold)
 998                                 it.nextInset()->asInsetMath()->asMacro()->fold(cur);
 999                         else
1000                                 it.nextInset()->asInsetMath()->asMacro()->unfold(cur);
1001                 }\v
1002                 break;
1003         }
1004
1005         case LFUN_QUOTE_INSERT:
1006                 // interpret this as if a straight " was typed
1007                 cur.recordUndo();
1008                 interpretChar(cur, '\"');
1009                 break;
1010
1011 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
1012 // handling such that "self-insert" works on "arbitrary stuff" too, and
1013 // math-insert only handles special math things like "matrix".
1014         case LFUN_MATH_INSERT: {
1015                 cur.recordUndo();
1016                 if (cmd.argument() == "^" || cmd.argument() == "_") {
1017                         interpretChar(cur, cmd.argument()[0]);
1018                 } else
1019                         cur.niceInsert(cmd.argument());
1020                 break;
1021                 }
1022
1023         case LFUN_DIALOG_SHOW_NEW_INSET: {
1024                 docstring const & name = cmd.argument();
1025                 string data;
1026                 if (name == "ref") {
1027                         InsetMathRef tmp(name);
1028                         data = tmp.createDialogStr(to_utf8(name));
1029                 }
1030                 cur.bv().showDialog(to_utf8(name), data);
1031                 break;
1032         }
1033
1034         case LFUN_INSET_INSERT: {
1035                 MathData ar;
1036                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
1037                         cur.recordUndo();
1038                         cur.insert(ar);
1039                 } else
1040                         cur.undispatched();
1041                 break;
1042         }
1043         case LFUN_INSET_DISSOLVE:
1044                 if (!asHullInset()) {
1045                         cur.recordUndoInset();
1046                         cur.pullArg();
1047                 }
1048                 break;
1049
1050         default:
1051                 InsetMath::doDispatch(cur, cmd);
1052                 break;
1053         }
1054 }
1055
1056
1057 bool InsetMathNest::findMacroToFoldUnfold(Cursor & it, bool fold) const {
1058         // look for macro to open/close, but stay in mathed
1059         for (; !it.empty(); it.pop_back()) {
1060
1061                 // go backward through the current cell
1062                 Inset * inset = it.nextInset();
1063                 while (inset && inset->asInsetMath()) {
1064                         MathMacro * macro = inset->asInsetMath()->asMacro();
1065                         if (macro) {
1066                                 // found the an macro to open/close?
1067                                 if (macro->folded() != fold)
1068                                         return true;
1069
1070                                 // Wrong folding state.
1071                                 // If this was the first we see in this slice, look further left,
1072                                 // otherwise go up.
1073                                 if (inset != it.nextInset())
1074                                         break;
1075                         }
1076
1077                         // go up if this was the left most position
1078                         if (it.pos() == 0)
1079                                 break;
1080
1081                         // go left
1082                         it.pos()--;
1083                         inset = it.nextInset();
1084                 }
1085         }
1086
1087         return false;
1088 }
1089
1090
1091 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1092                 FuncStatus & flag) const
1093 {
1094         // the font related toggles
1095         //string tc = "mathnormal";
1096         bool ret = true;
1097         string const arg = to_utf8(cmd.argument());
1098         switch (cmd.action) {
1099         case LFUN_TABULAR_FEATURE:
1100                 flag.enabled(false);
1101                 break;
1102 #if 0
1103         case LFUN_TABULAR_FEATURE:
1104                 // FIXME: check temporarily disabled
1105                 // valign code
1106                 char align = mathcursor::valign();
1107                 if (align == '\0') {
1108                         enable = false;
1109                         break;
1110                 }
1111                 if (cmd.argument().empty()) {
1112                         flag.clear();
1113                         break;
1114                 }
1115                 if (!contains("tcb", cmd.argument()[0])) {
1116                         enable = false;
1117                         break;
1118                 }
1119                 flag.setOnOff(cmd.argument()[0] == align);
1120                 break;
1121 #endif
1122         /// We have to handle them since 1.4 blocks all unhandled actions
1123         case LFUN_FONT_ITAL:
1124         case LFUN_FONT_BOLD:
1125         case LFUN_FONT_SANS:
1126         case LFUN_FONT_EMPH:
1127         case LFUN_FONT_TYPEWRITER:
1128         case LFUN_FONT_NOUN:
1129         case LFUN_FONT_ROMAN:
1130         case LFUN_FONT_DEFAULT:
1131                 flag.enabled(true);
1132                 break;
1133         case LFUN_MATH_MUTATE:
1134                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1135                 flag.setOnOff(false);
1136                 break;
1137
1138         // we just need to be in math mode to enable that
1139         case LFUN_MATH_SIZE:
1140         case LFUN_MATH_SPACE:
1141         case LFUN_MATH_LIMITS:
1142         case LFUN_MATH_NONUMBER:
1143         case LFUN_MATH_NUMBER:
1144         case LFUN_MATH_EXTERN:
1145                 flag.enabled(true);
1146                 break;
1147
1148         case LFUN_FONT_FRAK:
1149                 flag.enabled(currentMode() != TEXT_MODE);
1150                 break;
1151
1152         case LFUN_MATH_INSERT: {
1153                 bool const textarg =
1154                         arg == "\\textbf"   || arg == "\\textsf" ||
1155                         arg == "\\textrm"   || arg == "\\textmd" ||
1156                         arg == "\\textit"   || arg == "\\textsc" ||
1157                         arg == "\\textsl"   || arg == "\\textup" ||
1158                         arg == "\\texttt"   || arg == "\\textbb" ||
1159                         arg == "\\textnormal";
1160                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1161                 break;
1162         }
1163
1164         case LFUN_MATH_MATRIX:
1165                 flag.enabled(currentMode() == MATH_MODE);
1166                 break;
1167
1168         case LFUN_INSET_INSERT: {
1169                 // Don't test createMathInset_fromDialogStr(), since
1170                 // getStatus is not called with a valid reference and the
1171                 // dialog would not be applyable.
1172                 string const name = cmd.getArg(0);
1173                 flag.enabled(name == "ref");
1174                 break;
1175         }
1176
1177         case LFUN_MATH_DELIM:
1178         case LFUN_MATH_BIGDELIM:
1179                 // Don't do this with multi-cell selections
1180                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1181                 break;
1182
1183         case LFUN_MATH_MACRO_FOLD:
1184         case LFUN_MATH_MACRO_UNFOLD: {
1185                 Cursor it = cur;
1186                 bool found = findMacroToFoldUnfold(it, cmd.action == LFUN_MATH_MACRO_FOLD);
1187                 flag.enabled(found);
1188                 break;
1189         }
1190
1191         case LFUN_SPECIALCHAR_INSERT:
1192                 // FIXME: These would probably make sense in math-text mode
1193                 flag.enabled(false);
1194                 break;
1195
1196         case LFUN_INSET_DISSOLVE:
1197                 flag.enabled(!asHullInset());
1198                 break;
1199
1200         default:
1201                 ret = false;
1202                 break;
1203         }
1204         return ret;
1205 }
1206
1207
1208 void InsetMathNest::edit(Cursor & cur, bool left)
1209 {
1210         cur.push(*this);
1211         cur.idx() = left ? 0 : cur.lastidx();
1212         cur.pos() = left ? 0 : cur.lastpos();
1213         cur.resetAnchor();
1214         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1215 }
1216
1217
1218 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1219 {
1220         int idx_min = 0;
1221         int dist_min = 1000000;
1222         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1223                 int const d = cell(i).dist(cur.bv(), x, y);
1224                 if (d < dist_min) {
1225                         dist_min = d;
1226                         idx_min = i;
1227                 }
1228         }
1229         MathData & ar = cell(idx_min);
1230         cur.push(*this);
1231         cur.idx() = idx_min;
1232         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1233
1234         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1235         if (dist_min == 0) {
1236                 // hit inside cell
1237                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1238                         if (ar[i]->covers(cur.bv(), x, y))
1239                                 return ar[i].nucleus()->editXY(cur, x, y);
1240         }
1241         return this;
1242 }
1243
1244
1245 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1246 {
1247         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1248         BufferView & bv = cur.bv();
1249         bool do_selection = cmd.button() == mouse_button::button1
1250                 && cmd.argument() == "region-select";
1251         bv.mouseSetCursor(cur, do_selection);
1252         if (cmd.button() == mouse_button::button1) {
1253                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1254                 // Update the cursor update flags as needed:
1255                 //
1256                 // Update::Decoration: tells to update the decoration
1257                 //                     (visual box corners that define
1258                 //                     the inset)/
1259                 // Update::FitCursor: adjust the screen to the cursor
1260                 //                    position if needed
1261                 // cur.result().update(): don't overwrite previously set flags.
1262                 cur.updateFlags(Update::Decoration | Update::FitCursor
1263                                 | cur.result().update());
1264         } else if (cmd.button() == mouse_button::button2) {
1265                 if (cap::selection()) {
1266                         // See comment in Text::dispatch why we do this
1267                         cap::copySelectionToStack();
1268                         cmd = FuncRequest(LFUN_PASTE, "0");
1269                         doDispatch(bv.cursor(), cmd);
1270                 } else {
1271                         MathData ar;
1272                         asArray(theSelection().get(), ar);
1273                         bv.cursor().insert(ar);
1274                 }
1275         }
1276 }
1277
1278
1279 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1280 {
1281         // only select with button 1
1282         if (cmd.button() == mouse_button::button1) {
1283                 Cursor & bvcur = cur.bv().cursor();
1284                 if (bvcur.anchor_.hasPart(cur)) {
1285                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1286                         bvcur.setCursor(cur);
1287                         bvcur.selection() = true;
1288                         //lyxerr << "MOTION " << bvcur << endl;
1289                 } else
1290                         cur.undispatched();
1291         }
1292 }
1293
1294
1295 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1296 {
1297         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1298
1299         if (cmd.button() == mouse_button::button1) {
1300                 if (!cur.selection())
1301                         cur.noUpdate();
1302                 else {
1303                         Cursor & bvcur = cur.bv().cursor();
1304                         bvcur.selection() = true;
1305                 }
1306                 return;
1307         }
1308
1309         cur.undispatched();
1310 }
1311
1312
1313 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1314 {
1315         //lyxerr << "interpret 2: '" << c << "'" << endl;
1316         docstring save_selection;
1317         if (c == '^' || c == '_')
1318                 save_selection = grabAndEraseSelection(cur);
1319
1320         cur.clearTargetX();
1321
1322         // handle macroMode
1323         if (cur.inMacroMode()) {
1324                 docstring name = cur.macroName();
1325
1326                 /// are we currently typing '#1' or '#2' or...?
1327                 if (name == "\\#") {
1328                         cur.backspace();
1329                         int n = c - '0';
1330                         if (n >= 1 && n <= 9)
1331                                 cur.insert(new MathMacroArgument(n));
1332                         return true;
1333                 }
1334
1335                 if (isAlphaASCII(c)) {
1336                         cur.activeMacro()->setName(name + docstring(1, c));
1337                         return true;
1338                 }
1339
1340                 // handle 'special char' macros
1341                 if (name == "\\") {
1342                         // remove the '\\'
1343                         if (c == '\\') {
1344                                 cur.backspace();
1345                                 if (currentMode() == InsetMath::TEXT_MODE)
1346                                         cur.niceInsert(createInsetMath("textbackslash"));
1347                                 else
1348                                         cur.niceInsert(createInsetMath("backslash"));
1349                         } else if (c == '{') {
1350                                 cur.backspace();
1351                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1352                         } else if (c == '%') {
1353                                 cur.backspace();
1354                                 cur.niceInsert(MathAtom(new InsetMathComment));
1355                         } else if (c == '#') {
1356                                 BOOST_ASSERT(cur.activeMacro());
1357                                 cur.activeMacro()->setName(name + docstring(1, c));
1358                         } else {
1359                                 cur.backspace();
1360                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1361                         }
1362                         return true;
1363                 }
1364
1365                 // One character big delimiters. The others are handled in
1366                 // interpretString().
1367                 latexkeys const * l = in_word_set(name.substr(1));
1368                 if (name[0] == '\\' && l && l->inset == "big") {
1369                         docstring delim;
1370                         switch (c) {
1371                         case '{':
1372                                 delim = from_ascii("\\{");
1373                                 break;
1374                         case '}':
1375                                 delim = from_ascii("\\}");
1376                                 break;
1377                         default:
1378                                 delim = docstring(1, c);
1379                                 break;
1380                         }
1381                         if (InsetMathBig::isBigInsetDelim(delim)) {
1382                                 // name + delim ared a valid InsetMathBig.
1383                                 // We can't use cur.macroModeClose() because
1384                                 // it does not handle delim.
1385                                 InsetMathUnknown * p = cur.activeMacro();
1386                                 p->finalize();
1387                                 --cur.pos();
1388                                 cur.cell().erase(cur.pos());
1389                                 cur.plainInsert(MathAtom(
1390                                         new InsetMathBig(name.substr(1), delim)));
1391                                 return true;
1392                         }
1393                 }
1394
1395                 // leave macro mode and try again if necessary
1396                 cur.macroModeClose();
1397                 if (c == '{')
1398                         cur.niceInsert(MathAtom(new InsetMathBrace));
1399                 else if (c != ' ')
1400                         interpretChar(cur, c);
1401                 return true;
1402         }
1403
1404         // This is annoying as one has to press <space> far too often.
1405         // Disable it.
1406
1407 #if 0
1408                 // leave autocorrect mode if necessary
1409                 if (autocorrect() && c == ' ') {
1410                         autocorrect() = false;
1411                         return true;
1412                 }
1413 #endif
1414
1415         // just clear selection on pressing the space bar
1416         if (cur.selection() && c == ' ') {
1417                 cur.selection() = false;
1418                 return true;
1419         }
1420
1421         selClearOrDel(cur);
1422
1423         if (c == '\\') {
1424                 //lyxerr << "starting with macro" << endl;
1425                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1426                 return true;
1427         }
1428
1429         if (c == '\n') {
1430                 if (currentMode() == InsetMath::TEXT_MODE)
1431                         cur.insert(c);
1432                 return true;
1433         }
1434
1435         if (c == ' ') {
1436                 if (currentMode() == InsetMath::TEXT_MODE) {
1437                         // insert spaces in text mode,
1438                         // but suppress direct insertion of two spaces in a row
1439                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1440                         // it is better than nothing...
1441                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1442                                 cur.insert(c);
1443                                 // FIXME: we have to enable full redraw here because of the
1444                                 // visual box corners that define the inset. If we know for
1445                                 // sure that we stay within the same cell we can optimize for
1446                                 // that using:
1447                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1448                         }
1449                         return true;
1450                 }
1451                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1452                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1453                         // FIXME: we have to enable full redraw here because of the
1454                         // visual box corners that define the inset. If we know for
1455                         // sure that we stay within the same cell we can optimize for
1456                         // that using:
1457                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1458                         return true;
1459                 }
1460
1461                 if (cur.popForward()) {
1462                         // FIXME: we have to enable full redraw here because of the
1463                         // visual box corners that define the inset. If we know for
1464                         // sure that we stay within the same cell we can optimize for
1465                         // that using:
1466                         //cur.updateFlags(Update::FitCursor);
1467                         return true;
1468                 }
1469
1470                 // if we are at the very end, leave the formula
1471                 return cur.pos() != cur.lastpos();
1472         }
1473
1474         // These shouldn't work in text mode:
1475         if (currentMode() != InsetMath::TEXT_MODE) {
1476                 if (c == '_') {
1477                         script(cur, false, save_selection);
1478                         return true;
1479                 }
1480                 if (c == '^') {
1481                         script(cur, true, save_selection);
1482                         return true;
1483                 }
1484                 if (c == '~') {
1485                         cur.niceInsert(createInsetMath("sim"));
1486                         return true;
1487                 }
1488         }
1489
1490         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1491             c == '%' || c == '_' || c == '^') {
1492                 cur.niceInsert(createInsetMath(docstring(1, c)));
1493                 return true;
1494         }
1495
1496
1497         // try auto-correction
1498         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1499         //      return true;
1500
1501         // no special circumstances, so insert the character without any fuss
1502         cur.insert(c);
1503         cur.autocorrect() = true;
1504         return true;
1505 }
1506
1507
1508 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1509 {
1510         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1511         // possible
1512         if (!cur.empty() && cur.pos() > 0 &&
1513             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1514                 if (InsetMathBig::isBigInsetDelim(str)) {
1515                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1516                         if (prev[0] == '\\') {
1517                                 prev = prev.substr(1);
1518                                 latexkeys const * l = in_word_set(prev);
1519                                 if (l && l->inset == "big") {
1520                                         cur.cell()[cur.pos() - 1] =
1521                                                 MathAtom(new InsetMathBig(prev, str));
1522                                         return true;
1523                                 }
1524                         }
1525                 }
1526         }
1527         return false;
1528 }
1529
1530
1531 bool InsetMathNest::script(Cursor & cur, bool up,
1532                 docstring const & save_selection)
1533 {
1534         // Hack to get \^ and \_ working
1535         //lyxerr << "handling script: up: " << up << endl;
1536         if (cur.inMacroMode() && cur.macroName() == "\\") {
1537                 if (up)
1538                         cur.niceInsert(createInsetMath("mathcircumflex"));
1539                 else
1540                         interpretChar(cur, '_');
1541                 return true;
1542         }
1543
1544         cur.macroModeClose();
1545         if (asScriptInset() && cur.idx() == 0) {
1546                 // we are in a nucleus of a script inset, move to _our_ script
1547                 InsetMathScript * inset = asScriptInset();
1548                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1549                 inset->ensure(up);
1550                 cur.idx() = inset->idxOfScript(up);
1551                 cur.pos() = 0;
1552         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1553                 --cur.pos();
1554                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1555                 cur.push(*inset);
1556                 inset->ensure(up);
1557                 cur.idx() = inset->idxOfScript(up);
1558                 cur.pos() = cur.lastpos();
1559         } else {
1560                 // convert the thing to our left to a scriptinset or create a new
1561                 // one if in the very first position of the array
1562                 if (cur.pos() == 0) {
1563                         //lyxerr << "new scriptinset" << endl;
1564                         cur.insert(new InsetMathScript(up));
1565                 } else {
1566                         //lyxerr << "converting prev atom " << endl;
1567                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1568                 }
1569                 --cur.pos();
1570                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1571                 // See comment in MathParser.cpp for special handling of {}-bases
1572
1573                 cur.push(*inset);
1574                 cur.idx() = 1;
1575                 cur.pos() = 0;
1576         }
1577         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1578         cur.niceInsert(save_selection);
1579         cur.resetAnchor();
1580         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1581         return true;
1582 }
1583
1584
1585 } // namespace lyx