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 "InsetMathMBox.h"
  24 #include "InsetMathRef.h"
  25 #include "InsetMathScript.h"
  26 #include "InsetMathSpace.h"
  27 #include "InsetMathSymbol.h"
  28 #include "InsetMathUnknown.h"
  29 #include "MathData.h"
  30 #include "MathFactory.h"
  31 #include "MathMacroArgument.h"
  32 #include "MathParser.h"
  33 #include "MathStream.h"
  34 #include "MathSupport.h"
  35
  36 #include "bufferview_funcs.h"
  37 #include "BufferView.h"
  38 #include "Color.h"
  39 #include "CoordCache.h"
  40 #include "Cursor.h"
  41 #include "CutAndPaste.h"
  42 #include "debug.h"
  43 #include "DispatchResult.h"
  44 #include "FuncRequest.h"
  45 #include "FuncStatus.h"
  46 #include "gettext.h"
  47 #include "Text.h"
  48 #include "OutputParams.h"
  49 #include "Undo.h"
  50
  51 #include "support/lstrings.h"
  52 #include "support/textutils.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
  63 namespace lyx {
  64
  65 using cap::copySelection;
  66 using cap::grabAndEraseSelection;
  67 using cap::cutSelection;
  68 using cap::replaceSelection;
  69 using cap::selClearOrDel;
  70
  71 using std::endl;
  72 using std::string;
  73 using std::istringstream;
  74
  75
  76 InsetMathNest::InsetMathNest(idx_type nargs)
  77         : cells_(nargs), lock_(false), mouse_hover_(false)
  78 {}
  79
  80
  81 InsetMathNest::InsetMathNest(InsetMathNest const & inset)
  82         : InsetMath(inset), cells_(inset.cells_), lock_(inset.lock_),
  83           mouse_hover_(false)
  84 {}
  85
  86
  87 InsetMathNest & InsetMathNest::operator=(InsetMathNest const & inset)
  88 {
  89         cells_ = inset.cells_;
  90         lock_ = inset.lock_;
  91         mouse_hover_ = false;
  92         InsetMath::operator=(inset);
  93         return *this;
  94 }
  95
  96
  97 InsetMath::idx_type InsetMathNest::nargs() const
  98 {
  99         return cells_.size();
 100 }
 101
 102
 103 void InsetMathNest::cursorPos(BufferView const & bv,
 104                 CursorSlice const & sl, bool /*boundary*/,
 105                 int & x, int & y) const
 106 {
 107 // FIXME: This is a hack. Ideally, the coord cache should not store
 108 // absolute positions, but relative ones. This would mean to call
 109 // setXY() not in MathData::draw(), but in the parent insets' draw()
 110 // with the correctly adjusted x,y values. But this means that we'd have
 111 // to touch all (math)inset's draw() methods. Right now, we'll store
 112 // absolute value, and make them here relative, only to make them
 113 // absolute again when actually drawing the cursor. What a mess.
 114         BOOST_ASSERT(ptr_cmp(&sl.inset(), this));
 115         MathData const & ar = sl.cell();
 116         CoordCache const & coord_cache = bv.coordCache();
 117         if (!coord_cache.getArrays().has(&ar)) {
 118                 // this can (semi-)legally happen if we just created this cell
 119                 // and it never has been drawn before. So don't ASSERT.
 120                 //lyxerr << "no cached data for array " << &ar << endl;
 121                 x = 0;
 122                 y = 0;
 123                 return;
 124         }
 125         Point const pt = coord_cache.getArrays().xy(&ar);
 126         if (!coord_cache.getInsets().has(this)) {
 127                 // same as above
 128                 //lyxerr << "no cached data for inset " << this << endl;
 129                 x = 0;
 130                 y = 0;
 131                 return;
 132         }
 133         Point const pt2 = coord_cache.getInsets().xy(this);
 134         //lyxerr << "retrieving position cache for MathData "
 135         //      << pt.x_ << ' ' << pt.y_ << std::endl;
 136         x = pt.x_ - pt2.x_ + ar.pos2x(sl.pos());
 137         y = pt.y_ - pt2.y_;
 138 //      lyxerr << "pt.y_ : " << pt.y_ << " pt2_.y_ : " << pt2.y_
 139 //              << " asc: " << ascent() << "  des: " << descent()
 140 //              << " ar.asc: " << ar.ascent() << " ar.des: " << ar.descent() << endl;
 141         // move cursor visually into empty cells ("blue rectangles");
 142         if (ar.empty())
 143                 x += 2;
 144 }
 145
 146
 147 void InsetMathNest::metrics(MetricsInfo const & mi) const
 148 {
 149         MetricsInfo m = mi;
 150         for (idx_type i = 0, n = nargs(); i != n; ++i)
 151                 cell(i).metrics(m);
 152 }
 153
 154
 155 bool InsetMathNest::idxNext(Cursor & cur) const
 156 {
 157         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 158         if (cur.idx() == cur.lastidx())
 159                 return false;
 160         ++cur.idx();
 161         cur.pos() = 0;
 162         return true;
 163 }
 164
 165
 166 bool InsetMathNest::idxRight(Cursor & cur) const
 167 {
 168         return idxNext(cur);
 169 }
 170
 171
 172 bool InsetMathNest::idxPrev(Cursor & cur) const
 173 {
 174         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 175         if (cur.idx() == 0)
 176                 return false;
 177         --cur.idx();
 178         cur.pos() = cur.lastpos();
 179         return true;
 180 }
 181
 182
 183 bool InsetMathNest::idxLeft(Cursor & cur) const
 184 {
 185         return idxPrev(cur);
 186 }
 187
 188
 189 bool InsetMathNest::idxFirst(Cursor & cur) const
 190 {
 191         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 192         if (nargs() == 0)
 193                 return false;
 194         cur.idx() = 0;
 195         cur.pos() = 0;
 196         return true;
 197 }
 198
 199
 200 bool InsetMathNest::idxLast(Cursor & cur) const
 201 {
 202         BOOST_ASSERT(ptr_cmp(&cur.inset(), this));
 203         if (nargs() == 0)
 204                 return false;
 205         cur.idx() = cur.lastidx();
 206         cur.pos() = cur.lastpos();
 207         return true;
 208 }
 209
 210
 211 void InsetMathNest::dump() const
 212 {
 213         odocstringstream oss;
 214         WriteStream os(oss);
 215         os << "---------------------------------------------\n";
 216         write(os);
 217         os << "\n";
 218         for (idx_type i = 0, n = nargs(); i != n; ++i)
 219                 os << cell(i) << "\n";
 220         os << "---------------------------------------------\n";
 221         lyxerr << to_utf8(oss.str());
 222 }
 223
 224
 225 void InsetMathNest::draw(PainterInfo & pi, int x, int y) const
 226 {
 227 #if 0
 228         if (lock_)
 229                 pi.pain.fillRectangle(x, y - ascent(), width(), height(),
 230                                         Color::mathlockbg);
 231 #endif
 232         setPosCache(pi, x, y);
 233 }
 234
 235
 236 void InsetMathNest::drawSelection(PainterInfo & pi, int x, int y) const
 237 {
 238         BufferView & bv = *pi.base.bv;
 239         // this should use the x/y values given, not the cached values
 240         Cursor & cur = bv.cursor();
 241         if (!cur.selection())
 242                 return;
 243         if (!ptr_cmp(&cur.inset(), this))
 244                 return;
 245
 246         // FIXME: hack to get position cache warm
 247         pi.pain.setDrawingEnabled(false);
 248         draw(pi, x, y);
 249         pi.pain.setDrawingEnabled(true);
 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                 int x1 = c.xo(bv) + c.pos2x(s1.pos());
 259                 int y1 = c.yo(bv) - c.ascent();
 260                 int x2 = c.xo(bv) + c.pos2x(s2.pos());
 261                 int y2 = c.yo(bv) + c.descent();
 262                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 263         //lyxerr << "InsetMathNest::drawing selection 3: "
 264         //      << " x1: " << x1 << " x2: " << x2
 265         //      << " y1: " << y1 << " y2: " << y2 << endl;
 266         } else {
 267                 for (idx_type i = 0; i < nargs(); ++i) {
 268                         if (idxBetween(i, s1.idx(), s2.idx())) {
 269                                 MathData const & c = cell(i);
 270                                 int x1 = c.xo(bv);
 271                                 int y1 = c.yo(bv) - c.ascent();
 272                                 int x2 = c.xo(bv) + c.width();
 273                                 int y2 = c.yo(bv) + c.descent();
 274                                 pi.pain.fillRectangle(x1, y1, x2 - x1, y2 - y1, Color::selection);
 275                         }
 276                 }
 277         }
 278 }
 279
 280
 281 void InsetMathNest::validate(LaTeXFeatures & features) const
 282 {
 283         for (idx_type i = 0; i < nargs(); ++i)
 284                 cell(i).validate(features);
 285 }
 286
 287
 288 void InsetMathNest::replace(ReplaceData & rep)
 289 {
 290         for (idx_type i = 0; i < nargs(); ++i)
 291                 cell(i).replace(rep);
 292 }
 293
 294
 295 bool InsetMathNest::contains(MathData const & ar) const
 296 {
 297         for (idx_type i = 0; i < nargs(); ++i)
 298                 if (cell(i).contains(ar))
 299                         return true;
 300         return false;
 301 }
 302
 303
 304 bool InsetMathNest::lock() const
 305 {
 306         return lock_;
 307 }
 308
 309
 310 void InsetMathNest::lock(bool l)
 311 {
 312         lock_ = l;
 313 }
 314
 315
 316 bool InsetMathNest::isActive() const
 317 {
 318         return nargs() > 0;
 319 }
 320
 321
 322 MathData InsetMathNest::glue() const
 323 {
 324         MathData ar;
 325         for (size_t i = 0; i < nargs(); ++i)
 326                 ar.append(cell(i));
 327         return ar;
 328 }
 329
 330
 331 void InsetMathNest::write(WriteStream & os) const
 332 {
 333         os << '\\' << name().c_str();
 334         for (size_t i = 0; i < nargs(); ++i)
 335                 os << '{' << cell(i) << '}';
 336         if (nargs() == 0)
 337                 os.pendingSpace(true);
 338         if (lock_ && !os.latex()) {
 339                 os << "\\lyxlock";
 340                 os.pendingSpace(true);
 341         }
 342 }
 343
 344
 345 void InsetMathNest::normalize(NormalStream & os) const
 346 {
 347         os << '[' << name().c_str();
 348         for (size_t i = 0; i < nargs(); ++i)
 349                 os << ' ' << cell(i);
 350         os << ']';
 351 }
 352
 353
 354 int InsetMathNest::latex(Buffer const &, odocstream & os,
 355                         OutputParams const & runparams) const
 356 {
 357         WriteStream wi(os, runparams.moving_arg, true);
 358         write(wi);
 359         return wi.line();
 360 }
 361
 362
 363 bool InsetMathNest::setMouseHover(bool mouse_hover)
 364 {
 365         mouse_hover_ = mouse_hover;
 366         return true;
 367 }
 368
 369
 370 bool InsetMathNest::notifyCursorLeaves(Cursor & /*cur*/)
 371 {
 372         // FIXME: look here
 373 #if 0
 374         MathData & ar = cur.cell();
 375         // remove base-only "scripts"
 376         for (pos_type i = 0; i + 1 < ar.size(); ++i) {
 377                 InsetMathScript * p = operator[](i).nucleus()->asScriptInset();
 378                 if (p && p->nargs() == 1) {
 379                         MathData ar = p->nuc();
 380                         erase(i);
 381                         insert(i, ar);
 382                         cur.adjust(i, ar.size() - 1);
 383                 }
 384         }
 385
 386         // glue adjacent font insets of the same kind
 387         for (pos_type i = 0; i + 1 < size(); ++i) {
 388                 InsetMathFont * p = operator[](i).nucleus()->asFontInset();
 389                 InsetMathFont const * q = operator[](i + 1)->asFontInset();
 390                 if (p && q && p->name() == q->name()) {
 391                         p->cell(0).append(q->cell(0));
 392                         erase(i + 1);
 393                         cur.adjust(i, -1);
 394                 }
 395         }
 396 #endif
 397         return false;
 398 }
 399
 400
 401 void InsetMathNest::handleFont
 402         (Cursor & cur, docstring const & arg, char const * const font)
 403 {
 404         handleFont(cur, arg, from_ascii(font));
 405 }
 406
 407
 408 void InsetMathNest::handleFont
 409         (Cursor & cur, docstring const & arg, docstring const & font)
 410 {
 411         // this whole function is a hack and won't work for incremental font
 412         // changes...
 413
 414         if (cur.inset().asInsetMath()->name() == font) {
 415                 recordUndoInset(cur, Undo::ATOMIC);
 416                 cur.handleFont(to_utf8(font));
 417         } else {
 418                 recordUndo(cur, Undo::ATOMIC);
 419                 cur.handleNest(createInsetMath(font));
 420                 cur.insert(arg);
 421         }
 422 }
 423
 424
 425 void InsetMathNest::handleFont2(Cursor & cur, docstring const & arg)
 426 {
 427         recordUndo(cur, Undo::ATOMIC);
 428         Font font;
 429         bool b;
 430         bv_funcs::string2font(to_utf8(arg), font, b);
 431         if (font.color() != Color::inherit) {
 432                 MathAtom at = MathAtom(new InsetMathColor(true, font.color()));
 433                 cur.handleNest(at, 0);
 434         }
 435 }
 436
 437
 438 void InsetMathNest::doDispatch(Cursor & cur, FuncRequest & cmd)
 439 {
 440         //lyxerr << "InsetMathNest: request: " << cmd << std::endl;
 441         //CursorSlice sl = cur.current();
 442
 443         switch (cmd.action) {
 444
 445         case LFUN_PASTE: {
 446                 recordUndo(cur);
 447                 cur.message(_("Paste"));
 448                 replaceSelection(cur);
 449                 docstring topaste;
 450                 if (cmd.argument().empty() && !theClipboard().isInternal())
 451                         topaste = theClipboard().getAsText();
 452                 else {
 453                         size_t n = 0;
 454                         idocstringstream is(cmd.argument());
 455                         is >> n;
 456                         topaste = cap::getSelection(cur.buffer(), n);
 457                 }
 458                 cur.niceInsert(topaste);
 459                 cur.clearSelection(); // bug 393
 460                 finishUndo();
 461                 break;
 462         }
 463
 464         case LFUN_CUT:
 465                 recordUndo(cur);
 466                 cutSelection(cur, true, true);
 467                 cur.message(_("Cut"));
 468                 // Prevent stale position >= size crash
 469                 // Probably not necessary anymore, see eraseSelection (gb 2005-10-09)
 470                 cur.normalize();
 471                 break;
 472
 473         case LFUN_COPY:
 474                 copySelection(cur);
 475                 cur.message(_("Copy"));
 476                 break;
 477
 478         case LFUN_MOUSE_PRESS:
 479                 lfunMousePress(cur, cmd);
 480                 break;
 481
 482         case LFUN_MOUSE_MOTION:
 483                 lfunMouseMotion(cur, cmd);
 484                 break;
 485
 486         case LFUN_MOUSE_RELEASE:
 487                 lfunMouseRelease(cur, cmd);
 488                 break;
 489
 490         case LFUN_FINISHED_LEFT:
 491                 cur.bv().cursor() = cur;
 492                 break;
 493
 494         case LFUN_FINISHED_RIGHT:
 495                 ++cur.pos();
 496                 cur.bv().cursor() = cur;
 497                 break;
 498
 499         case LFUN_CHAR_FORWARD:
 500                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 501         case LFUN_CHAR_FORWARD_SELECT:
 502                 cur.selHandle(cmd.action == LFUN_CHAR_FORWARD_SELECT);
 503                 cur.autocorrect() = false;
 504                 cur.clearTargetX();
 505                 cur.macroModeClose();
 506                 if (reverseDirectionNeeded(cur))
 507                         goto goto_char_backwards;
 508
 509 goto_char_forwards:
 510                 if (cur.pos() != cur.lastpos() && cur.openable(cur.nextAtom())) {
 511                         cur.pushLeft(*cur.nextAtom().nucleus());
 512                         cur.inset().idxFirst(cur);
 513                 } else if (cur.posRight() || idxRight(cur)
 514                         || cur.popRight() || cur.selection())
 515                         ;
 516                 else {
 517                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 518                         cur.undispatched();
 519                 }
 520                 break;
 521
 522         case LFUN_CHAR_BACKWARD:
 523                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 524         case LFUN_CHAR_BACKWARD_SELECT:
 525                 cur.selHandle(cmd.action == LFUN_CHAR_BACKWARD_SELECT);
 526                 cur.autocorrect() = false;
 527                 cur.clearTargetX();
 528                 cur.macroModeClose();
 529                 if (reverseDirectionNeeded(cur))
 530                         goto goto_char_forwards;
 531
 532 goto_char_backwards:
 533                 if (cur.pos() != 0 && cur.openable(cur.prevAtom())) {
 534                         cur.posLeft();
 535                         cur.push(*cur.nextAtom().nucleus());
 536                         cur.inset().idxLast(cur);
 537                 } else if (cur.posLeft() || idxLeft(cur)
 538                         || cur.popLeft() || cur.selection())
 539                         ;
 540                 else {
 541                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 542                         cur.undispatched();
 543                 }
 544                 break;
 545
 546         case LFUN_DOWN:
 547         case LFUN_UP:
 548                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 549         case LFUN_DOWN_SELECT:
 550         case LFUN_UP_SELECT: {
 551                 // close active macro
 552                 if (cur.inMacroMode()) {
 553                         cur.macroModeClose();
 554                         break;
 555                 }
 556
 557                 // stop/start the selection
 558                 bool select = cmd.action == LFUN_DOWN_SELECT ||
 559                         cmd.action == LFUN_UP_SELECT;
 560                 cur.selHandle(select);
 561
 562                 // go up/down
 563                 bool up = cmd.action == LFUN_UP || cmd.action == LFUN_UP_SELECT;
 564                 bool successful = cur.upDownInMath(up);
 565                 if (successful) {
 566                         // notify left insets and give them chance to set update flags
 567                         lyx::notifyCursorLeaves(cur.beforeDispatchCursor(), cur);
 568                         cur.fixIfBroken();
 569                         break;
 570                 }
 571
 572                 if (cur.fixIfBroken())
 573                         // FIXME: Something bad happened. We pass the corrected Cursor
 574                         // instead of letting things go worse.
 575                         break;
 576
 577                 // We did not manage to move the cursor.
 578                 cur.undispatched();
 579                 break;
 580         }
 581
 582         case LFUN_MOUSE_DOUBLE:
 583         case LFUN_MOUSE_TRIPLE:
 584         case LFUN_WORD_SELECT:
 585                 cur.pos() = 0;
 586                 cur.idx() = 0;
 587                 cur.resetAnchor();
 588                 cur.selection() = true;
 589                 cur.pos() = cur.lastpos();
 590                 cur.idx() = cur.lastidx();
 591                 break;
 592
 593         case LFUN_PARAGRAPH_UP:
 594         case LFUN_PARAGRAPH_DOWN:
 595                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 596         case LFUN_PARAGRAPH_UP_SELECT:
 597         case LFUN_PARAGRAPH_DOWN_SELECT:
 598                 break;
 599
 600         case LFUN_LINE_BEGIN:
 601         case LFUN_WORD_BACKWARD:
 602                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 603         case LFUN_LINE_BEGIN_SELECT:
 604         case LFUN_WORD_BACKWARD_SELECT:
 605                 cur.selHandle(cmd.action == LFUN_WORD_BACKWARD_SELECT ||
 606                                 cmd.action == LFUN_LINE_BEGIN_SELECT);
 607                 cur.macroModeClose();
 608                 if (cur.pos() != 0) {
 609                         cur.pos() = 0;
 610                 } else if (cur.col() != 0) {
 611                         cur.idx() -= cur.col();
 612                         cur.pos() = 0;
 613                 } else if (cur.idx() != 0) {
 614                         cur.idx() = 0;
 615                         cur.pos() = 0;
 616                 } else {
 617                         cmd = FuncRequest(LFUN_FINISHED_LEFT);
 618                         cur.undispatched();
 619                 }
 620                 break;
 621
 622         case LFUN_WORD_FORWARD:
 623         case LFUN_LINE_END:
 624                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 625         case LFUN_WORD_FORWARD_SELECT:
 626         case LFUN_LINE_END_SELECT:
 627                 cur.selHandle(cmd.action == LFUN_WORD_FORWARD_SELECT ||
 628                                 cmd.action == LFUN_LINE_END_SELECT);
 629                 cur.macroModeClose();
 630                 cur.clearTargetX();
 631                 if (cur.pos() != cur.lastpos()) {
 632                         cur.pos() = cur.lastpos();
 633                 } else if (ncols() && (cur.col() != cur.lastcol())) {
 634                         cur.idx() = cur.idx() - cur.col() + cur.lastcol();
 635                         cur.pos() = cur.lastpos();
 636                 } else if (cur.idx() != cur.lastidx()) {
 637                         cur.idx() = cur.lastidx();
 638                         cur.pos() = cur.lastpos();
 639                 } else {
 640                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 641                         cur.undispatched();
 642                 }
 643                 break;
 644
 645         case LFUN_SCREEN_UP_SELECT:
 646         case LFUN_SCREEN_UP:
 647                 cmd = FuncRequest(LFUN_FINISHED_LEFT);
 648                 cur.undispatched();
 649                 break;
 650
 651         case LFUN_SCREEN_DOWN_SELECT:
 652         case LFUN_SCREEN_DOWN:
 653                 cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 654                 cur.undispatched();
 655                 break;
 656
 657         case LFUN_CELL_FORWARD:
 658                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 659                 cur.inset().idxNext(cur);
 660                 break;
 661
 662         case LFUN_CELL_BACKWARD:
 663                 cur.updateFlags(Update::Decoration | Update::FitCursor);
 664                 cur.inset().idxPrev(cur);
 665                 break;
 666
 667         case LFUN_WORD_DELETE_BACKWARD:
 668         case LFUN_CHAR_DELETE_BACKWARD:
 669                 if (cur.pos() == 0)
 670                         // May affect external cell:
 671                         recordUndoInset(cur, Undo::ATOMIC);
 672                 else
 673                         recordUndo(cur, Undo::ATOMIC);
 674                 // if the inset can not be removed from within, delete it
 675                 if (!cur.backspace()) {
 676                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 677                         cur.innerText()->dispatch(cur, cmd);
 678                 }
 679                 break;
 680
 681         case LFUN_WORD_DELETE_FORWARD:
 682         case LFUN_CHAR_DELETE_FORWARD:
 683                 if (cur.pos() == cur.lastpos())
 684                         // May affect external cell:
 685                         recordUndoInset(cur, Undo::ATOMIC);
 686                 else
 687                         recordUndo(cur, Undo::ATOMIC);
 688                 // if the inset can not be removed from within, delete it
 689                 if (!cur.erase()) {
 690                         FuncRequest cmd = FuncRequest(LFUN_CHAR_DELETE_FORWARD);
 691                         cur.innerText()->dispatch(cur, cmd);
 692                 }
 693                 break;
 694
 695         case LFUN_ESCAPE:
 696                 if (cur.selection())
 697                         cur.clearSelection();
 698                 else  {
 699                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 700                         cur.undispatched();
 701                 }
 702                 break;
 703
 704         case LFUN_INSET_TOGGLE:
 705                 recordUndo(cur);
 706                 lock(!lock());
 707                 cur.popRight();
 708                 break;
 709
 710         case LFUN_SELF_INSERT:
 711                 if (cmd.argument().size() != 1) {
 712                         recordUndo(cur);
 713                         docstring const arg = cmd.argument();
 714                         if (!interpretString(cur, arg))
 715                                 cur.insert(arg);
 716                         break;
 717                 }
 718                 // Don't record undo steps if we are in macro mode and
 719                 // cmd.argument is the next character of the macro name.
 720                 // Otherwise we'll get an invalid cursor if we undo after
 721                 // the macro was finished and the macro is a known command,
 722                 // e.g. sqrt. Cursor::macroModeClose replaces in this case
 723                 // the InsetMathUnknown with name "frac" by an empty
 724                 // InsetMathFrac -> a pos value > 0 is invalid.
 725                 // A side effect is that an undo before the macro is finished
 726                 // undoes the complete macro, not only the last character.
 727                 if (!cur.inMacroMode())
 728                         recordUndo(cur);
 729
 730                 // spacial handling of space. If we insert an inset
 731                 // via macro mode, we want to put the cursor inside it
 732                 // if relevant. Think typing "\frac<space>".
 733                 if (cmd.argument()[0] == ' '
 734                     && cur.inMacroMode() && cur.macroName() != "\\"
 735                     && cur.macroModeClose()) {
 736                         MathAtom const atom = cur.prevAtom();
 737                         if (atom->asNestInset() && atom->isActive()) {
 738                                 cur.posLeft();
 739                                 cur.pushLeft(*cur.nextInset());
 740                         }
 741                 } else if (!interpretChar(cur, cmd.argument()[0])) {
 742                         cmd = FuncRequest(LFUN_FINISHED_RIGHT);
 743                         cur.undispatched();
 744                 }
 745                 break;
 746
 747         //case LFUN_SERVER_GET_XY:
 748         //      sprintf(dispatch_buffer, "%d %d",);
 749         //      break;
 750
 751         case LFUN_SERVER_SET_XY: {
 752                 lyxerr << "LFUN_SERVER_SET_XY broken!" << endl;
 753                 int x = 0;
 754                 int y = 0;
 755                 istringstream is(to_utf8(cmd.argument()));
 756                 is >> x >> y;
 757                 cur.setScreenPos(x, y);
 758                 break;
 759         }
 760
 761         // Special casing for superscript in case of LyX handling
 762         // dead-keys:
 763         case LFUN_ACCENT_CIRCUMFLEX:
 764                 if (cmd.argument().empty()) {
 765                         // do superscript if LyX handles
 766                         // deadkeys
 767                         recordUndo(cur, Undo::ATOMIC);
 768                         script(cur, true, grabAndEraseSelection(cur));
 769                 }
 770                 break;
 771
 772         case LFUN_ACCENT_UMLAUT:
 773         case LFUN_ACCENT_ACUTE:
 774         case LFUN_ACCENT_GRAVE:
 775         case LFUN_ACCENT_BREVE:
 776         case LFUN_ACCENT_DOT:
 777         case LFUN_ACCENT_MACRON:
 778         case LFUN_ACCENT_CARON:
 779         case LFUN_ACCENT_TILDE:
 780         case LFUN_ACCENT_CEDILLA:
 781         case LFUN_ACCENT_CIRCLE:
 782         case LFUN_ACCENT_UNDERDOT:
 783         case LFUN_ACCENT_TIE:
 784         case LFUN_ACCENT_OGONEK:
 785         case LFUN_ACCENT_HUNGARIAN_UMLAUT:
 786                 break;
 787
 788         //  Math fonts
 789         case LFUN_FONT_FREE_APPLY:
 790         case LFUN_FONT_FREE_UPDATE:
 791                 handleFont2(cur, cmd.argument());
 792                 break;
 793
 794         case LFUN_FONT_BOLD:
 795                 if (currentMode() == TEXT_MODE)
 796                         handleFont(cur, cmd.argument(), "textbf");
 797                 else
 798                         handleFont(cur, cmd.argument(), "mathbf");
 799                 break;
 800         case LFUN_FONT_SANS:
 801                 if (currentMode() == TEXT_MODE)
 802                         handleFont(cur, cmd.argument(), "textsf");
 803                 else
 804                         handleFont(cur, cmd.argument(), "mathsf");
 805                 break;
 806         case LFUN_FONT_EMPH:
 807                 if (currentMode() == TEXT_MODE)
 808                         handleFont(cur, cmd.argument(), "emph");
 809                 else
 810                         handleFont(cur, cmd.argument(), "mathcal");
 811                 break;
 812         case LFUN_FONT_ROMAN:
 813                 if (currentMode() == TEXT_MODE)
 814                         handleFont(cur, cmd.argument(), "textrm");
 815                 else
 816                         handleFont(cur, cmd.argument(), "mathrm");
 817                 break;
 818         case LFUN_FONT_CODE:
 819                 if (currentMode() == TEXT_MODE)
 820                         handleFont(cur, cmd.argument(), "texttt");
 821                 else
 822                         handleFont(cur, cmd.argument(), "mathtt");
 823                 break;
 824         case LFUN_FONT_FRAK:
 825                 handleFont(cur, cmd.argument(), "mathfrak");
 826                 break;
 827         case LFUN_FONT_ITAL:
 828                 if (currentMode() == TEXT_MODE)
 829                         handleFont(cur, cmd.argument(), "textit");
 830                 else
 831                         handleFont(cur, cmd.argument(), "mathit");
 832                 break;
 833         case LFUN_FONT_NOUN:
 834                 if (currentMode() == TEXT_MODE)
 835                         // FIXME: should be "noun"
 836                         handleFont(cur, cmd.argument(), "textsc");
 837                 else
 838                         handleFont(cur, cmd.argument(), "mathbb");
 839                 break;
 840         /*
 841         case LFUN_FONT_FREE_APPLY:
 842                 handleFont(cur, cmd.argument(), "textrm");
 843                 break;
 844         */
 845         case LFUN_FONT_DEFAULT:
 846                 handleFont(cur, cmd.argument(), "textnormal");
 847                 break;
 848
 849         case LFUN_MATH_MODE: {
 850 #if 1
 851                 // ignore math-mode on when already in math mode
 852                 if (currentMode() == Inset::MATH_MODE && cmd.argument() == "on")
 853                         break;
 854                 cur.macroModeClose();
 855                 docstring const save_selection = grabAndEraseSelection(cur);
 856                 selClearOrDel(cur);
 857                 //cur.plainInsert(MathAtom(new InsetMathMBox(cur.bv())));
 858                 cur.plainInsert(MathAtom(new InsetMathBox(from_ascii("mbox"))));
 859                 cur.posLeft();
 860                 cur.pushLeft(*cur.nextInset());
 861                 cur.niceInsert(save_selection);
 862 #else
 863                 if (currentMode() == Inset::TEXT_MODE) {
 864                         cur.niceInsert(MathAtom(new InsetMathHull("simple")));
 865                         cur.message(_("create new math text environment ($...$)"));
 866                 } else {
 867                         handleFont(cur, cmd.argument(), "textrm");
 868                         cur.message(_("entered math text mode (textrm)"));
 869                 }
 870 #endif
 871                 break;
 872         }
 873
 874         case LFUN_MATH_SIZE:
 875 #if 0
 876                 recordUndo(cur);
 877                 cur.setSize(arg);
 878 #endif
 879                 break;
 880
 881         case LFUN_MATH_MATRIX: {
 882                 recordUndo(cur, Undo::ATOMIC);
 883                 unsigned int m = 1;
 884                 unsigned int n = 1;
 885                 docstring v_align;
 886                 docstring h_align;
 887                 idocstringstream is(cmd.argument());
 888                 is >> m >> n >> v_align >> h_align;
 889                 if (m < 1)
 890                         m = 1;
 891                 if (n < 1)
 892                         n = 1;
 893                 v_align += 'c';
 894                 cur.niceInsert(
 895                         MathAtom(new InsetMathArray(from_ascii("array"), m, n, (char)v_align[0], h_align)));
 896                 break;
 897         }
 898
 899         case LFUN_MATH_DELIM: {
 900                 docstring ls;
 901                 docstring rs = support::split(cmd.argument(), ls, ' ');
 902                 // Reasonable default values
 903                 if (ls.empty())
 904                         ls = '(';
 905                 if (rs.empty())
 906                         rs = ')';
 907                 recordUndo(cur, Undo::ATOMIC);
 908                 cur.handleNest(MathAtom(new InsetMathDelim(ls, rs)));
 909                 break;
 910         }
 911
 912         case LFUN_MATH_BIGDELIM: {
 913                 docstring const lname  = from_utf8(cmd.getArg(0));
 914                 docstring const ldelim = from_utf8(cmd.getArg(1));
 915                 docstring const rname  = from_utf8(cmd.getArg(2));
 916                 docstring const rdelim = from_utf8(cmd.getArg(3));
 917                 latexkeys const * l = in_word_set(lname);
 918                 bool const have_l = l && l->inset == "big" &&
 919                                     InsetMathBig::isBigInsetDelim(ldelim);
 920                 l = in_word_set(rname);
 921                 bool const have_r = l && l->inset == "big" &&
 922                                     InsetMathBig::isBigInsetDelim(rdelim);
 923                 // We mimic LFUN_MATH_DELIM in case we have an empty left
 924                 // or right delimiter.
 925                 if (have_l || have_r) {
 926                         recordUndo(cur, Undo::ATOMIC);
 927                         docstring const selection = grabAndEraseSelection(cur);
 928                         selClearOrDel(cur);
 929                         if (have_l)
 930                                 cur.insert(MathAtom(new InsetMathBig(lname,
 931                                                                 ldelim)));
 932                         cur.niceInsert(selection);
 933                         if (have_r)
 934                                 cur.insert(MathAtom(new InsetMathBig(rname,
 935                                                                 rdelim)));
 936                 }
 937                 // Don't call cur.undispatched() if we did nothing, this would
 938                 // lead to infinite recursion via Text::dispatch().
 939                 break;
 940         }
 941
 942         case LFUN_SPACE_INSERT:
 943         case LFUN_MATH_SPACE:
 944                 recordUndo(cur, Undo::ATOMIC);
 945                 cur.insert(MathAtom(new InsetMathSpace(from_ascii(","))));
 946                 break;
 947
 948         case LFUN_ERT_INSERT:
 949                 // interpret this as if a backslash was typed
 950                 recordUndo(cur, Undo::ATOMIC);
 951                 interpretChar(cur, '\\');
 952                 break;
 953
 954         case LFUN_MATH_SUBSCRIPT:
 955                 // interpret this as if a _ was typed
 956                 recordUndo(cur, Undo::ATOMIC);
 957                 interpretChar(cur, '_');
 958                 break;
 959
 960         case LFUN_MATH_SUPERSCRIPT:
 961                 // interpret this as if a ^ was typed
 962                 recordUndo(cur, Undo::ATOMIC);
 963                 interpretChar(cur, '^');
 964                 break;
 965
 966         case LFUN_QUOTE_INSERT:
 967                 // interpret this as if a straight " was typed
 968                 recordUndo(cur, Undo::ATOMIC);
 969                 interpretChar(cur, '\"');
 970                 break;
 971
 972 // FIXME: We probably should swap parts of "math-insert" and "self-insert"
 973 // handling such that "self-insert" works on "arbitrary stuff" too, and
 974 // math-insert only handles special math things like "matrix".
 975         case LFUN_MATH_INSERT: {
 976                 recordUndo(cur, Undo::ATOMIC);
 977                 if (cmd.argument() == "^" || cmd.argument() == "_") {
 978                         interpretChar(cur, cmd.argument()[0]);
 979                 } else
 980                         cur.niceInsert(cmd.argument());
 981                 break;
 982                 }
 983
 984         case LFUN_DIALOG_SHOW_NEW_INSET: {
 985                 docstring const & name = cmd.argument();
 986                 string data;
 987                 if (name == "ref") {
 988                         InsetMathRef tmp(name);
 989                         data = tmp.createDialogStr(to_utf8(name));
 990                 }
 991                 cur.bv().showInsetDialog(to_utf8(name), data, 0);
 992                 break;
 993         }
 994
 995         case LFUN_INSET_INSERT: {
 996                 MathData ar;
 997                 if (createInsetMath_fromDialogStr(cmd.argument(), ar)) {
 998                         recordUndo(cur);
 999                         cur.insert(ar);
1000                 } else
1001                         cur.undispatched();
1002                 break;
1003         }
1004
1005         default:
1006                 InsetMath::doDispatch(cur, cmd);
1007                 break;
1008         }
1009 }
1010
1011
1012 bool InsetMathNest::getStatus(Cursor & cur, FuncRequest const & cmd,
1013                 FuncStatus & flag) const
1014 {
1015         // the font related toggles
1016         //string tc = "mathnormal";
1017         bool ret = true;
1018         string const arg = to_utf8(cmd.argument());
1019         switch (cmd.action) {
1020         case LFUN_TABULAR_FEATURE:
1021                 flag.enabled(false);
1022                 break;
1023 #if 0
1024         case LFUN_TABULAR_FEATURE:
1025                 // FIXME: check temporarily disabled
1026                 // valign code
1027                 char align = mathcursor::valign();
1028                 if (align == '\0') {
1029                         enable = false;
1030                         break;
1031                 }
1032                 if (cmd.argument().empty()) {
1033                         flag.clear();
1034                         break;
1035                 }
1036                 if (!contains("tcb", cmd.argument()[0])) {
1037                         enable = false;
1038                         break;
1039                 }
1040                 flag.setOnOff(cmd.argument()[0] == align);
1041                 break;
1042 #endif
1043         /// We have to handle them since 1.4 blocks all unhandled actions
1044         case LFUN_FONT_ITAL:
1045         case LFUN_FONT_BOLD:
1046         case LFUN_FONT_SANS:
1047         case LFUN_FONT_EMPH:
1048         case LFUN_FONT_CODE:
1049         case LFUN_FONT_NOUN:
1050         case LFUN_FONT_ROMAN:
1051         case LFUN_FONT_DEFAULT:
1052                 flag.enabled(true);
1053                 break;
1054         case LFUN_MATH_MUTATE:
1055                 //flag.setOnOff(mathcursor::formula()->hullType() == to_utf8(cmd.argument()));
1056                 flag.setOnOff(false);
1057                 break;
1058
1059         // we just need to be in math mode to enable that
1060         case LFUN_MATH_SIZE:
1061         case LFUN_MATH_SPACE:
1062         case LFUN_MATH_LIMITS:
1063         case LFUN_MATH_NONUMBER:
1064         case LFUN_MATH_NUMBER:
1065         case LFUN_MATH_EXTERN:
1066                 flag.enabled(true);
1067                 break;
1068
1069         case LFUN_FONT_FRAK:
1070                 flag.enabled(currentMode() != TEXT_MODE);
1071                 break;
1072
1073         case LFUN_MATH_INSERT: {
1074                 bool const textarg =
1075                         arg == "\\textbf"   || arg == "\\textsf" ||
1076                         arg == "\\textrm"   || arg == "\\textmd" ||
1077                         arg == "\\textit"   || arg == "\\textsc" ||
1078                         arg == "\\textsl"   || arg == "\\textup" ||
1079                         arg == "\\texttt"   || arg == "\\textbb" ||
1080                         arg == "\\textnormal";
1081                 flag.enabled(currentMode() != TEXT_MODE || textarg);
1082                 break;
1083         }
1084
1085         case LFUN_MATH_MATRIX:
1086                 flag.enabled(currentMode() == MATH_MODE);
1087                 break;
1088
1089         case LFUN_INSET_INSERT: {
1090                 // Don't test createMathInset_fromDialogStr(), since
1091                 // getStatus is not called with a valid reference and the
1092                 // dialog would not be applyable.
1093                 string const name = cmd.getArg(0);
1094                 flag.enabled(name == "ref");
1095                 break;
1096         }
1097
1098         case LFUN_MATH_DELIM:
1099         case LFUN_MATH_BIGDELIM:
1100                 // Don't do this with multi-cell selections
1101                 flag.enabled(cur.selBegin().idx() == cur.selEnd().idx());
1102                 break;
1103
1104         case LFUN_HYPHENATION_POINT_INSERT:
1105         case LFUN_LIGATURE_BREAK_INSERT:
1106         case LFUN_MENU_SEPARATOR_INSERT:
1107         case LFUN_DOTS_INSERT:
1108         case LFUN_END_OF_SENTENCE_PERIOD_INSERT:
1109                 // FIXME: These would probably make sense in math-text mode
1110                 flag.enabled(false);
1111                 break;
1112
1113         default:
1114                 ret = false;
1115                 break;
1116         }
1117         return ret;
1118 }
1119
1120
1121 void InsetMathNest::edit(Cursor & cur, bool left)
1122 {
1123         cur.push(*this);
1124         cur.idx() = left ? 0 : cur.lastidx();
1125         cur.pos() = left ? 0 : cur.lastpos();
1126         cur.resetAnchor();
1127         //lyxerr << "InsetMathNest::edit, cur:\n" << cur << endl;
1128 }
1129
1130
1131 Inset * InsetMathNest::editXY(Cursor & cur, int x, int y)
1132 {
1133         int idx_min = 0;
1134         int dist_min = 1000000;
1135         for (idx_type i = 0, n = nargs(); i != n; ++i) {
1136                 int const d = cell(i).dist(cur.bv(), x, y);
1137                 if (d < dist_min) {
1138                         dist_min = d;
1139                         idx_min = i;
1140                 }
1141         }
1142         MathData & ar = cell(idx_min);
1143         cur.push(*this);
1144         cur.idx() = idx_min;
1145         cur.pos() = ar.x2pos(x - ar.xo(cur.bv()));
1146
1147         //lyxerr << "found cell : " << idx_min << " pos: " << cur.pos() << endl;
1148         if (dist_min == 0) {
1149                 // hit inside cell
1150                 for (pos_type i = 0, n = ar.size(); i < n; ++i)
1151                         if (ar[i]->covers(cur.bv(), x, y))
1152                                 return ar[i].nucleus()->editXY(cur, x, y);
1153         }
1154         return this;
1155 }
1156
1157
1158 void InsetMathNest::lfunMousePress(Cursor & cur, FuncRequest & cmd)
1159 {
1160         //lyxerr << "## lfunMousePress: buttons: " << cmd.button() << endl;
1161         BufferView & bv = cur.bv();
1162         bv.mouseSetCursor(cur);
1163         if (cmd.button() == mouse_button::button1) {
1164                 //lyxerr << "## lfunMousePress: setting cursor to: " << cur << endl;
1165                 // Update the cursor update flags as needed:
1166                 //
1167                 // Update::Decoration: tells to update the decoration
1168                 //                     (visual box corners that define
1169                 //                     the inset)/
1170                 // Update::FitCursor: adjust the screen to the cursor
1171                 //                    position if needed
1172                 // cur.result().update(): don't overwrite previously set flags.
1173                 cur.updateFlags(Update::Decoration | Update::FitCursor
1174                                 | cur.result().update());
1175         } else if (cmd.button() == mouse_button::button2) {
1176                 if (cap::selection()) {
1177                         // See comment in Text::dispatch why we do this
1178                         cap::copySelectionToStack();
1179                         cmd = FuncRequest(LFUN_PASTE, "0");
1180                         doDispatch(bv.cursor(), cmd);
1181                 } else {
1182                         MathData ar;
1183                         asArray(theSelection().get(), ar);
1184                         bv.cursor().insert(ar);
1185                 }
1186         }
1187 }
1188
1189
1190 void InsetMathNest::lfunMouseMotion(Cursor & cur, FuncRequest & cmd)
1191 {
1192         // only select with button 1
1193         if (cmd.button() == mouse_button::button1) {
1194                 Cursor & bvcur = cur.bv().cursor();
1195                 if (bvcur.anchor_.hasPart(cur)) {
1196                         //lyxerr << "## lfunMouseMotion: cursor: " << cur << endl;
1197                         bvcur.setCursor(cur);
1198                         bvcur.selection() = true;
1199                         //lyxerr << "MOTION " << bvcur << endl;
1200                 } else
1201                         cur.undispatched();
1202         }
1203 }
1204
1205
1206 void InsetMathNest::lfunMouseRelease(Cursor & cur, FuncRequest & cmd)
1207 {
1208         //lyxerr << "## lfunMouseRelease: buttons: " << cmd.button() << endl;
1209
1210         if (cmd.button() == mouse_button::button1) {
1211                 if (!cur.selection())
1212                         cur.noUpdate();
1213                 else {
1214                         Cursor & bvcur = cur.bv().cursor();
1215                         bvcur.selection() = true;
1216                 }
1217                 return;
1218         }
1219
1220         cur.undispatched();
1221 }
1222
1223
1224 bool InsetMathNest::interpretChar(Cursor & cur, char_type c)
1225 {
1226         //lyxerr << "interpret 2: '" << c << "'" << endl;
1227         docstring save_selection;
1228         if (c == '^' || c == '_')
1229                 save_selection = grabAndEraseSelection(cur);
1230
1231         cur.clearTargetX();
1232
1233         // handle macroMode
1234         if (cur.inMacroMode()) {
1235                 docstring name = cur.macroName();
1236
1237                 /// are we currently typing '#1' or '#2' or...?
1238                 if (name == "\\#") {
1239                         cur.backspace();
1240                         int n = c - '0';
1241                         if (n >= 1 && n <= 9)
1242                                 cur.insert(new MathMacroArgument(n));
1243                         return true;
1244                 }
1245
1246                 if (isAlphaASCII(c)) {
1247                         cur.activeMacro()->setName(name + docstring(1, c));
1248                         return true;
1249                 }
1250
1251                 // handle 'special char' macros
1252                 if (name == "\\") {
1253                         // remove the '\\'
1254                         if (c == '\\') {
1255                                 cur.backspace();
1256                                 if (currentMode() == InsetMath::TEXT_MODE)
1257                                         cur.niceInsert(createInsetMath("textbackslash"));
1258                                 else
1259                                         cur.niceInsert(createInsetMath("backslash"));
1260                         } else if (c == '{') {
1261                                 cur.backspace();
1262                                 cur.niceInsert(MathAtom(new InsetMathBrace));
1263                         } else if (c == '%') {
1264                                 cur.backspace();
1265                                 cur.niceInsert(MathAtom(new InsetMathComment));
1266                         } else if (c == '#') {
1267                                 BOOST_ASSERT(cur.activeMacro());
1268                                 cur.activeMacro()->setName(name + docstring(1, c));
1269                         } else {
1270                                 cur.backspace();
1271                                 cur.niceInsert(createInsetMath(docstring(1, c)));
1272                         }
1273                         return true;
1274                 }
1275
1276                 // One character big delimiters. The others are handled in
1277                 // interpretString().
1278                 latexkeys const * l = in_word_set(name.substr(1));
1279                 if (name[0] == '\\' && l && l->inset == "big") {
1280                         docstring delim;
1281                         switch (c) {
1282                         case '{':
1283                                 delim = from_ascii("\\{");
1284                                 break;
1285                         case '}':
1286                                 delim = from_ascii("\\}");
1287                                 break;
1288                         default:
1289                                 delim = docstring(1, c);
1290                                 break;
1291                         }
1292                         if (InsetMathBig::isBigInsetDelim(delim)) {
1293                                 // name + delim ared a valid InsetMathBig.
1294                                 // We can't use cur.macroModeClose() because
1295                                 // it does not handle delim.
1296                                 InsetMathUnknown * p = cur.activeMacro();
1297                                 p->finalize();
1298                                 --cur.pos();
1299                                 cur.cell().erase(cur.pos());
1300                                 cur.plainInsert(MathAtom(
1301                                         new InsetMathBig(name.substr(1), delim)));
1302                                 return true;
1303                         }
1304                 }
1305
1306                 // leave macro mode and try again if necessary
1307                 cur.macroModeClose();
1308                 if (c == '{')
1309                         cur.niceInsert(MathAtom(new InsetMathBrace));
1310                 else if (c != ' ')
1311                         interpretChar(cur, c);
1312                 return true;
1313         }
1314
1315         // This is annoying as one has to press <space> far too often.
1316         // Disable it.
1317
1318 #if 0
1319                 // leave autocorrect mode if necessary
1320                 if (autocorrect() && c == ' ') {
1321                         autocorrect() = false;
1322                         return true;
1323                 }
1324 #endif
1325
1326         // just clear selection on pressing the space bar
1327         if (cur.selection() && c == ' ') {
1328                 cur.selection() = false;
1329                 return true;
1330         }
1331
1332         selClearOrDel(cur);
1333
1334         if (c == '\\') {
1335                 //lyxerr << "starting with macro" << endl;
1336                 cur.insert(MathAtom(new InsetMathUnknown(from_ascii("\\"), false)));
1337                 return true;
1338         }
1339
1340         if (c == '\n') {
1341                 if (currentMode() == InsetMath::TEXT_MODE)
1342                         cur.insert(c);
1343                 return true;
1344         }
1345
1346         if (c == ' ') {
1347                 if (currentMode() == InsetMath::TEXT_MODE) {
1348                         // insert spaces in text mode,
1349                         // but suppress direct insertion of two spaces in a row
1350                         // the still allows typing  '<space>a<space>' and deleting the 'a', but
1351                         // it is better than nothing...
1352                         if (!cur.pos() != 0 || cur.prevAtom()->getChar() != ' ') {
1353                                 cur.insert(c);
1354                                 // FIXME: we have to enable full redraw here because of the
1355                                 // visual box corners that define the inset. If we know for
1356                                 // sure that we stay within the same cell we can optimize for
1357                                 // that using:
1358                                 //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1359                         }
1360                         return true;
1361                 }
1362                 if (cur.pos() != 0 && cur.prevAtom()->asSpaceInset()) {
1363                         cur.prevAtom().nucleus()->asSpaceInset()->incSpace();
1364                         // FIXME: we have to enable full redraw here because of the
1365                         // visual box corners that define the inset. If we know for
1366                         // sure that we stay within the same cell we can optimize for
1367                         // that using:
1368                         //cur.updateFlags(Update::SinglePar | Update::FitCursor);
1369                         return true;
1370                 }
1371
1372                 if (cur.popRight()) {
1373                         // FIXME: we have to enable full redraw here because of the
1374                         // visual box corners that define the inset. If we know for
1375                         // sure that we stay within the same cell we can optimize for
1376                         // that using:
1377                         //cur.updateFlags(Update::FitCursor);
1378                         return true;
1379                 }
1380
1381                 // if we are at the very end, leave the formula
1382                 return cur.pos() != cur.lastpos();
1383         }
1384
1385         // These shouldn't work in text mode:
1386         if (currentMode() != InsetMath::TEXT_MODE) {
1387                 if (c == '_') {
1388                         script(cur, false, save_selection);
1389                         return true;
1390                 }
1391                 if (c == '^') {
1392                         script(cur, true, save_selection);
1393                         return true;
1394                 }
1395                 if (c == '~') {
1396                         cur.niceInsert(createInsetMath("sim"));
1397                         return true;
1398                 }
1399         }
1400
1401         if (c == '{' || c == '}' || c == '&' || c == '$' || c == '#' ||
1402             c == '%' || c == '_' || c == '^') {
1403                 cur.niceInsert(createInsetMath(docstring(1, c)));
1404                 return true;
1405         }
1406
1407
1408         // try auto-correction
1409         //if (autocorrect() && hasPrevAtom() && math_autocorrect(prevAtom(), c))
1410         //      return true;
1411
1412         // no special circumstances, so insert the character without any fuss
1413         cur.insert(c);
1414         cur.autocorrect() = true;
1415         return true;
1416 }
1417
1418
1419 bool InsetMathNest::interpretString(Cursor & cur, docstring const & str)
1420 {
1421         // Create a InsetMathBig from cur.cell()[cur.pos() - 1] and t if
1422         // possible
1423         if (!cur.empty() && cur.pos() > 0 &&
1424             cur.cell()[cur.pos() - 1]->asUnknownInset()) {
1425                 if (InsetMathBig::isBigInsetDelim(str)) {
1426                         docstring prev = asString(cur.cell()[cur.pos() - 1]);
1427                         if (prev[0] == '\\') {
1428                                 prev = prev.substr(1);
1429                                 latexkeys const * l = in_word_set(prev);
1430                                 if (l && l->inset == "big") {
1431                                         cur.cell()[cur.pos() - 1] =
1432                                                 MathAtom(new InsetMathBig(prev, str));
1433                                         return true;
1434                                 }
1435                         }
1436                 }
1437         }
1438         return false;
1439 }
1440
1441
1442 bool InsetMathNest::script(Cursor & cur, bool up,
1443                 docstring const & save_selection)
1444 {
1445         // Hack to get \^ and \_ working
1446         //lyxerr << "handling script: up: " << up << endl;
1447         if (cur.inMacroMode() && cur.macroName() == "\\") {
1448                 if (up)
1449                         cur.niceInsert(createInsetMath("mathcircumflex"));
1450                 else
1451                         interpretChar(cur, '_');
1452                 return true;
1453         }
1454
1455         cur.macroModeClose();
1456         if (asScriptInset() && cur.idx() == 0) {
1457                 // we are in a nucleus of a script inset, move to _our_ script
1458                 InsetMathScript * inset = asScriptInset();
1459                 //lyxerr << " going to cell " << inset->idxOfScript(up) << endl;
1460                 inset->ensure(up);
1461                 cur.idx() = inset->idxOfScript(up);
1462                 cur.pos() = 0;
1463         } else if (cur.pos() != 0 && cur.prevAtom()->asScriptInset()) {
1464                 --cur.pos();
1465                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1466                 cur.push(*inset);
1467                 inset->ensure(up);
1468                 cur.idx() = inset->idxOfScript(up);
1469                 cur.pos() = cur.lastpos();
1470         } else {
1471                 // convert the thing to our left to a scriptinset or create a new
1472                 // one if in the very first position of the array
1473                 if (cur.pos() == 0) {
1474                         //lyxerr << "new scriptinset" << endl;
1475                         cur.insert(new InsetMathScript(up));
1476                 } else {
1477                         //lyxerr << "converting prev atom " << endl;
1478                         cur.prevAtom() = MathAtom(new InsetMathScript(cur.prevAtom(), up));
1479                 }
1480                 --cur.pos();
1481                 InsetMathScript * inset = cur.nextAtom().nucleus()->asScriptInset();
1482                 // See comment in MathParser.cpp for special handling of {}-bases
1483
1484                 cur.push(*inset);
1485                 cur.idx() = 1;
1486                 cur.pos() = 0;
1487         }
1488         //lyxerr << "inserting selection 1:\n" << save_selection << endl;
1489         cur.niceInsert(save_selection);
1490         cur.resetAnchor();
1491         //lyxerr << "inserting selection 2:\n" << save_selection << endl;
1492         return true;
1493 }
1494
1495
1496 } // namespace lyx