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