1 /**
2 * \file Cursor.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
5 *
6 * \author Alejandro Aguilar Sierra
7 * \author Alfredo Braunstein
8 * \author Dov Feldstern
9 * \author André Pönitz
10 * \author Stefan Schimanski
11 *
12 * Full author contact details are available in file CREDITS.
13 */
14
15 #include <config.h>
16
17 #include "Buffer.h"
18 #include "BufferParams.h"
19 #include "BufferView.h"
20 #include "CoordCache.h"
21 #include "Cursor.h"
22 #include "CutAndPaste.h"
23 #include "DispatchResult.h"
24 #include "Font.h"
25 #include "FuncCode.h"
26 #include "FuncRequest.h"
27 #include "Language.h"
28 #include "Layout.h"
29 #include "LyXAction.h"
30 #include "LyXRC.h"
31 #include "Paragraph.h"
32 #include "ParIterator.h"
33 #include "Row.h"
34 #include "texstream.h"
35 #include "Text.h"
36 #include "TextMetrics.h"
37 #include "TocBackend.h"
38
39 #include "support/debug.h"
40 #include "support/docstream.h"
41 #include "support/ExceptionMessage.h"
42 #include "support/gettext.h"
43 #include "support/lassert.h"
44
45 #include "insets/InsetTabular.h"
46 #include "insets/InsetText.h"
47
48 #include "mathed/InsetMath.h"
49 #include "mathed/InsetMathBrace.h"
50 #include "mathed/InsetMathEnsureMath.h"
51 #include "mathed/InsetMathScript.h"
52 #include "mathed/MacroTable.h"
53 #include "mathed/MathData.h"
54 #include "mathed/MathFactory.h"
55 #include "mathed/InsetMathMacro.h"
56
57 #include <sstream>
58 #include <limits>
59 #include <map>
60 #include <algorithm>
61
62 using namespace std;
63
64 namespace lyx {
65
66 namespace {
67
68 // Find position closest to (x, y) in cell given by iter.
69 // Used only in mathed
bruteFind(Cursor const & c,int x,int y)70 DocIterator bruteFind(Cursor const & c, int x, int y)
71 {
72 double best_dist = numeric_limits<double>::max();
73
74 DocIterator result;
75
76 DocIterator it = c;
77 it.pos() = 0;
78 DocIterator et = c;
79 et.pos() = et.lastpos();
80 for (size_t i = 0;; ++i) {
81 int xo;
82 int yo;
83 Inset const * inset = &it.inset();
84 CoordCache::Insets const & insetCache = c.bv().coordCache().getInsets();
85
86 // FIXME: in the case where the inset is not in the cache, this
87 // means that no part of it is visible on screen. In this case
88 // we don't do elaborate search and we just return the forwarded
89 // DocIterator at its beginning.
90 if (!insetCache.has(inset)) {
91 it.top().pos() = 0;
92 return it;
93 }
94
95 Point const o = insetCache.xy(inset);
96 inset->cursorPos(c.bv(), it.top(), c.boundary(), xo, yo);
97 // Convert to absolute
98 xo += o.x_;
99 yo += o.y_;
100 double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
101 // '<=' in order to take the last possible position
102 // this is important for clicking behind \sum in e.g. '\sum_i a'
103 LYXERR(Debug::DEBUG, "i: " << i << " d: " << d
104 << " best: " << best_dist);
105 if (d <= best_dist) {
106 best_dist = d;
107 result = it;
108 }
109 if (it == et)
110 break;
111 it.forwardPos();
112 }
113 return result;
114 }
115
116
117 } // namespace
118
119
CursorData()120 CursorData::CursorData()
121 : DocIterator(), anchor_(),
122 selection_(false), mark_(false), word_selection_(false),
123 current_font(inherit_font),
124 autocorrect_(false), macromode_(false)
125 {}
126
127
CursorData(Buffer * buffer)128 CursorData::CursorData(Buffer * buffer)
129 : DocIterator(buffer), anchor_(),
130 selection_(false), mark_(false), word_selection_(false),
131 current_font(inherit_font),
132 autocorrect_(false), macromode_(false)
133 {}
134
135
CursorData(DocIterator const & dit)136 CursorData::CursorData(DocIterator const & dit)
137 : DocIterator(dit), anchor_(),
138 selection_(false), mark_(false), word_selection_(false),
139 current_font(inherit_font),
140 autocorrect_(false), macromode_(false)
141 {}
142
143
144
145
operator <<(ostream & os,CursorData const & cur)146 ostream & operator<<(ostream & os, CursorData const & cur)
147 {
148 os << "\n cursor: | anchor:\n";
149 for (size_t i = 0, n = cur.depth(); i != n; ++i) {
150 os << " " << cur[i] << " | ";
151 if (i < cur.anchor_.depth())
152 os << cur.anchor_[i];
153 else
154 os << "-------------------------------";
155 os << "\n";
156 }
157 for (size_t i = cur.depth(), n = cur.anchor_.depth(); i < n; ++i) {
158 os << "------------------------------- | " << cur.anchor_[i] << "\n";
159 }
160 os << " selection: " << cur.selection_
161 // << " x_target: " << cur.x_target_
162 << " boundary: " << cur.boundary() << endl;
163 return os;
164 }
165
166
operator <<(LyXErr & os,CursorData const & cur)167 LyXErr & operator<<(LyXErr & os, CursorData const & cur)
168 {
169 os.stream() << cur;
170 return os;
171 }
172
173
174 // be careful: this is called from the bv's constructor, too, so
175 // bv functions are not yet available!
Cursor(BufferView & bv)176 Cursor::Cursor(BufferView & bv)
177 : CursorData(&bv.buffer()), bv_(&bv),
178 x_target_(-1), textTargetOffset_(0),
179 beforeDispatchPosX_(0), beforeDispatchPosY_(0)
180 {}
181
182
reset()183 void Cursor::reset()
184 {
185 clear();
186 push_back(CursorSlice(buffer()->inset()));
187 anchor_ = doc_iterator_begin(buffer());
188 anchor_.clear();
189 new_word_ = doc_iterator_begin(buffer());
190 new_word_.clear();
191 clearTargetX();
192 selection_ = false;
193 mark_ = false;
194 }
195
196
setCursor(DocIterator const & cur)197 void Cursor::setCursor(DocIterator const & cur)
198 {
199 DocIterator::operator=(cur);
200 }
201
202
setCursorSelectionTo(DocIterator dit)203 void Cursor::setCursorSelectionTo(DocIterator dit)
204 {
205 size_t i = 0;
206 // normalise dit
207 while (i < dit.depth() && i < anchor_.depth() && dit[i] == anchor_[i])
208 ++i;
209 if (i != dit.depth()) {
210 // otherwise the cursor is already normal
211 if (i == anchor_.depth())
212 // dit is a proper extension of the anchor_
213 dit.cutOff(i - 1);
214 else if (i + 1 < dit.depth()) {
215 // one has dit[i] != anchor_[i] but either dit[i-1] == anchor_[i-1]
216 // or i == 0. Remove excess.
217 dit.cutOff(i);
218 if (dit[i] > anchor_[i])
219 // place dit after the inset it was in
220 ++dit.pos();
221 }
222 }
223 setCursor(dit);
224 setSelection();
225 }
226
227
setCursorToAnchor()228 void Cursor::setCursorToAnchor()
229 {
230 if (selection()) {
231 DocIterator normal = anchor_;
232 while (depth() < normal.depth())
233 normal.pop_back();
234 if (depth() < anchor_.depth() && top() <= anchor_[depth() - 1])
235 ++normal.pos();
236 setCursor(normal);
237 }
238 }
239
240
setCursorData(CursorData const & data)241 void Cursor::setCursorData(CursorData const & data)
242 {
243 CursorData::operator=(data);
244 }
245
246
getStatus(FuncRequest const & cmd,FuncStatus & status) const247 bool Cursor::getStatus(FuncRequest const & cmd, FuncStatus & status) const
248 {
249 Cursor cur = *this;
250
251 // Try to fix cursor in case it is broken.
252 cur.fixIfBroken();
253
254 // Is this a function that acts on inset at point?
255 Inset * inset = cur.nextInset();
256 if (lyxaction.funcHasFlag(cmd.action(), LyXAction::AtPoint)
257 && inset && inset->getStatus(cur, cmd, status))
258 return true;
259
260 // This is, of course, a mess. Better create a new doc iterator and use
261 // this in Inset::getStatus. This might require an additional
262 // BufferView * arg, though (which should be avoided)
263 //Cursor safe = *this;
264 bool res = false;
265 for ( ; cur.depth(); cur.pop()) {
266 //lyxerr << "\nCursor::getStatus: cmd: " << cmd << endl << *this << endl;
267 // LASSERT: Is it safe to continue here, or should we return?
268 LASSERT(cur.idx() <= cur.lastidx(), /**/);
269 LASSERT(cur.pit() <= cur.lastpit(), /**/);
270 LASSERT(cur.pos() <= cur.lastpos(), /**/);
271
272 // The inset's getStatus() will return 'true' if it made
273 // a definitive decision on whether it want to handle the
274 // request or not. The result of this decision is put into
275 // the 'status' parameter.
276 if (cur.inset().getStatus(cur, cmd, status)) {
277 res = true;
278 break;
279 }
280 }
281 return res;
282 }
283
284
saveBeforeDispatchPosXY()285 void Cursor::saveBeforeDispatchPosXY()
286 {
287 getPos(beforeDispatchPosX_, beforeDispatchPosY_);
288 }
289
290
dispatch(FuncRequest const & cmd0)291 void Cursor::dispatch(FuncRequest const & cmd0)
292 {
293 LYXERR(Debug::ACTION, "Cursor::dispatch: cmd: " << cmd0 << '\n' << *this);
294 if (empty())
295 return;
296
297 fixIfBroken();
298 FuncRequest cmd = cmd0;
299 Cursor safe = *this;
300 Cursor old = *this;
301 disp_ = DispatchResult();
302
303 beginUndoGroup();
304
305 // Is this a function that acts on inset at point?
306 if (lyxaction.funcHasFlag(cmd.action(), LyXAction::AtPoint)
307 && nextInset()) {
308 disp_.dispatched(true);
309 disp_.screenUpdate(Update::FitCursor | Update::Force);
310 FuncRequest tmpcmd = cmd;
311 LYXERR(Debug::DEBUG, "Cursor::dispatch: (AtPoint) cmd: "
312 << cmd0 << endl << *this);
313 nextInset()->dispatch(*this, tmpcmd);
314 if (disp_.dispatched()) {
315 endUndoGroup();
316 return;
317 }
318 }
319
320 // store some values to be used inside of the handlers
321 beforeDispatchCursor_ = *this;
322 for (; depth(); pop(), boundary(false)) {
323 LYXERR(Debug::DEBUG, "Cursor::dispatch: cmd: "
324 << cmd0 << endl << *this);
325
326 // In any of these cases, the cursor is invalid, and we should
327 // try to save this document rather than crash.
328 LBUFERR(pos() <= lastpos());
329 LBUFERR(idx() <= lastidx());
330 LBUFERR(pit() <= lastpit());
331
332 // The common case is 'LFUN handled, need update', so make the
333 // LFUN handler's life easier by assuming this as default value.
334 // The handler can reset the update and val flags if necessary.
335 disp_.screenUpdate(Update::FitCursor | Update::Force);
336 disp_.dispatched(true);
337 inset().dispatch(*this, cmd);
338 if (disp_.dispatched())
339 break;
340 }
341
342 // it completely to get a 'bomb early' behaviour in case this
343 // object will be used again.
344 if (!disp_.dispatched()) {
345 LYXERR(Debug::DEBUG, "RESTORING OLD CURSOR!");
346 // We might have invalidated the cursor when removing an empty
347 // paragraph while the cursor could not be moved out the inset
348 // while we initially thought we could. This might happen when
349 // a multiline inset becomes an inline inset when the second
350 // paragraph is removed.
351 if (safe.pit() > safe.lastpit()) {
352 safe.pit() = safe.lastpit();
353 safe.pos() = safe.lastpos();
354 }
355 operator=(safe);
356 disp_.screenUpdate(Update::None);
357 disp_.dispatched(false);
358 } else {
359 // restore the previous one because nested Cursor::dispatch calls
360 // are possible which would change it
361 beforeDispatchCursor_ = safe.beforeDispatchCursor_;
362 }
363 endUndoGroup();
364
365 // NOTE: The code below has been copied to BufferView::dispatch.
366 // If you need to modify this, please update the other one too.
367
368 // notify insets we just left
369 if (*this != old) {
370 old.beginUndoGroup();
371 old.fixIfBroken();
372 bool badcursor = notifyCursorLeavesOrEnters(old, *this);
373 if (badcursor) {
374 fixIfBroken();
375 bv().resetInlineCompletionPos();
376 }
377 old.endUndoGroup();
378 }
379 }
380
381
result() const382 DispatchResult const & Cursor::result() const
383 {
384 return disp_;
385 }
386
387
bv() const388 BufferView & Cursor::bv() const
389 {
390 LBUFERR(bv_);
391 return *bv_;
392 }
393
394
pop()395 void Cursor::pop()
396 {
397 LBUFERR(depth() >= 1);
398 pop_back();
399 }
400
401
push(Inset & p)402 void Cursor::push(Inset & p)
403 {
404 push_back(CursorSlice(p));
405 p.setBuffer(*buffer());
406 }
407
408
pushBackward(Inset & p)409 void Cursor::pushBackward(Inset & p)
410 {
411 LASSERT(!empty(), return);
412 //lyxerr << "Entering inset " << t << " front" << endl;
413 push(p);
414 p.idxFirst(*this);
415 }
416
417
popBackward()418 bool Cursor::popBackward()
419 {
420 LASSERT(!empty(), return false);
421 if (depth() == 1)
422 return false;
423 pop();
424 return true;
425 }
426
427
popForward()428 bool Cursor::popForward()
429 {
430 LASSERT(!empty(), return false);
431 //lyxerr << "Leaving inset from in back" << endl;
432 const pos_type lp = (depth() > 1) ? (*this)[depth() - 2].lastpos() : 0;
433 if (depth() == 1)
434 return false;
435 pop();
436 pos() += lastpos() - lp + 1;
437 return true;
438 }
439
440
currentMode()441 int Cursor::currentMode()
442 {
443 LASSERT(!empty(), return Inset::UNDECIDED_MODE);
444 for (int i = depth() - 1; i >= 0; --i) {
445 int res = operator[](i).inset().currentMode();
446 bool locked_mode = operator[](i).inset().lockedMode();
447 // Also return UNDECIDED_MODE when the mode is locked,
448 // as in this case it is treated the same as TEXT_MODE
449 if (res != Inset::UNDECIDED_MODE || locked_mode)
450 return res;
451 }
452 return Inset::TEXT_MODE;
453 }
454
455
getPos(int & x,int & y) const456 void Cursor::getPos(int & x, int & y) const
457 {
458 Point p = bv().getPos(*this);
459 x = p.x_;
460 y = p.y_;
461 }
462
463
textRow() const464 Row const & Cursor::textRow() const
465 {
466 CursorSlice const & cs = innerTextSlice();
467 ParagraphMetrics const & pm = bv().parMetrics(cs.text(), cs.pit());
468 return pm.getRow(pos(), boundary());
469 }
470
471
resetAnchor()472 void Cursor::resetAnchor()
473 {
474 anchor_ = *this;
475 checkNewWordPosition();
476 }
477
478
markNewWordPosition()479 void Cursor::markNewWordPosition()
480 {
481 if (lyxrc.spellcheck_continuously && inTexted() && new_word_.empty()) {
482 FontSpan nw = locateWord(WHOLE_WORD);
483 if (nw.size() == 1) {
484 LYXERR(Debug::DEBUG, "start new word: "
485 << " par: " << pit()
486 << " pos: " << nw.first);
487 new_word_ = *this;
488 }
489 }
490 }
491
492
clearNewWordPosition()493 void Cursor::clearNewWordPosition()
494 {
495 if (!new_word_.empty()) {
496 LYXERR(Debug::DEBUG, "clear new word: "
497 << " par: " << pit()
498 << " pos: " << pos());
499 new_word_.resize(0);
500 }
501 }
502
503
checkNewWordPosition()504 void Cursor::checkNewWordPosition()
505 {
506 if (!lyxrc.spellcheck_continuously || new_word_.empty())
507 return ;
508 if (!inTexted())
509 clearNewWordPosition();
510 else {
511 // forget the position of the current new word if
512 // 1) the paragraph changes or
513 // 2) the count of nested insets changes or
514 // 3) the cursor pos is out of paragraph bound
515 if (pit() != new_word_.pit() ||
516 depth() != new_word_.depth() ||
517 new_word_.pos() > new_word_.lastpos()) {
518 clearNewWordPosition();
519 } else if (new_word_.fixIfBroken())
520 // 4) or the remembered position was "broken"
521 clearNewWordPosition();
522 else {
523 FontSpan nw = locateWord(WHOLE_WORD);
524 if (!nw.empty()) {
525 FontSpan ow = new_word_.locateWord(WHOLE_WORD);
526 if (nw.intersect(ow).empty())
527 clearNewWordPosition();
528 else
529 LYXERR(Debug::DEBUG, "new word: "
530 << " par: " << pit()
531 << " pos: " << nw.first << ".." << nw.last);
532 } else {
533 clearNewWordPosition();
534 }
535 }
536 }
537 }
538
539
posVisRight(bool skip_inset)540 bool Cursor::posVisRight(bool skip_inset)
541 {
542 Cursor new_cur = *this; // where we will move to
543 pos_type left_pos; // position visually left of current cursor
544 pos_type right_pos; // position visually right of current cursor
545
546 getSurroundingPos(left_pos, right_pos);
547
548 LYXERR(Debug::RTL, left_pos <<"|"<< right_pos << " (pos: "<< pos() <<")");
549
550 // Are we at an inset?
551 new_cur.pos() = right_pos;
552 new_cur.boundary(false);
553 if (!skip_inset &&
554 text()->checkAndActivateInsetVisual(new_cur, right_pos >= pos(), false)) {
555 // we actually move the cursor at the end of this
556 // function, for now we just keep track of the new
557 // position in new_cur...
558 LYXERR(Debug::RTL, "entering inset at: " << new_cur.pos());
559 }
560
561 // Are we already at rightmost pos in row?
562 else if (text()->empty() || right_pos == -1) {
563
564 new_cur = *this;
565 if (!new_cur.posVisToNewRow(false)) {
566 LYXERR(Debug::RTL, "not moving!");
567 return false;
568 }
569
570 // we actually move the cursor at the end of this
571 // function, for now just keep track of the new
572 // position in new_cur...
573 LYXERR(Debug::RTL, "right edge, moving: " << int(new_cur.pit()) << ","
574 << int(new_cur.pos()) << "," << (new_cur.boundary() ? 1 : 0));
575
576 }
577 // normal movement to the right
578 else {
579 new_cur = *this;
580 // Recall, if the cursor is at position 'x', that
581 // means *before* the character at position 'x'. In
582 // RTL, "before" means "to the right of", in LTR, "to
583 // the left of". So currently our situation is this:
584 // the position to our right is 'right_pos' (i.e.,
585 // we're currently to the left of 'right_pos'). In
586 // order to move to the right, it depends whether or
587 // not the character at 'right_pos' is RTL.
588 bool const new_pos_is_RTL = paragraph().getFontSettings(
589 buffer()->params(), right_pos).isVisibleRightToLeft();
590 // If the character at 'right_pos' *is* LTR, then in
591 // order to move to the right of it, we need to be
592 // *after* 'right_pos', i.e., move to position
593 // 'right_pos' + 1.
594 if (!new_pos_is_RTL) {
595 new_cur.pos() = right_pos + 1;
596 // set the boundary to true in two situations:
597 if (
598 // 1. if new_pos is now lastpos, and we're in
599 // an RTL paragraph (this means that we're
600 // moving right to the end of an LTR chunk
601 // which is at the end of an RTL paragraph);
602 (new_cur.pos() == lastpos()
603 && paragraph().isRTL(buffer()->params()))
604 // 2. if the position *after* right_pos is RTL
605 // (we want to be *after* right_pos, not
606 // before right_pos + 1!)
607 || paragraph().getFontSettings(buffer()->params(),
608 new_cur.pos()).isVisibleRightToLeft()
609 )
610 new_cur.boundary(true);
611 else // set the boundary to false
612 new_cur.boundary(false);
613 }
614 // Otherwise (if the character at position 'right_pos'
615 // is RTL), then moving to the right of it is as easy
616 // as setting the new position to 'right_pos'.
617 else {
618 new_cur.pos() = right_pos;
619 new_cur.boundary(false);
620 }
621
622 }
623
624 bool const moved = new_cur != *this || new_cur.boundary() != boundary();
625
626 if (moved) {
627 LYXERR(Debug::RTL, "moving to: " << new_cur.pos()
628 << (new_cur.boundary() ? " (boundary)" : ""));
629 *this = new_cur;
630 }
631
632 return moved;
633 }
634
635
posVisLeft(bool skip_inset)636 bool Cursor::posVisLeft(bool skip_inset)
637 {
638 Cursor new_cur = *this; // where we will move to
639 pos_type left_pos; // position visually left of current cursor
640 pos_type right_pos; // position visually right of current cursor
641
642 getSurroundingPos(left_pos, right_pos);
643
644 LYXERR(Debug::RTL, left_pos <<"|"<< right_pos << " (pos: "<< pos() <<")");
645
646 // Are we at an inset?
647 new_cur.pos() = left_pos;
648 new_cur.boundary(false);
649 if (!skip_inset &&
650 text()->checkAndActivateInsetVisual(new_cur, left_pos >= pos(), true)) {
651 // we actually move the cursor at the end of this
652 // function, for now we just keep track of the new
653 // position in new_cur...
654 LYXERR(Debug::RTL, "entering inset at: " << new_cur.pos());
655 }
656
657 // Are we already at leftmost pos in row?
658 else if (text()->empty() || left_pos == -1) {
659
660 new_cur = *this;
661 if (!new_cur.posVisToNewRow(true)) {
662 LYXERR(Debug::RTL, "not moving!");
663 return false;
664 }
665
666 // we actually move the cursor at the end of this
667 // function, for now just keep track of the new
668 // position in new_cur...
669 LYXERR(Debug::RTL, "left edge, moving: " << int(new_cur.pit()) << ","
670 << int(new_cur.pos()) << "," << (new_cur.boundary() ? 1 : 0));
671
672 }
673 // normal movement to the left
674 else {
675 new_cur = *this;
676 // Recall, if the cursor is at position 'x', that
677 // means *before* the character at position 'x'. In
678 // RTL, "before" means "to the right of", in LTR, "to
679 // the left of". So currently our situation is this:
680 // the position to our left is 'left_pos' (i.e., we're
681 // currently to the right of 'left_pos'). In order to
682 // move to the left, it depends whether or not the
683 // character at 'left_pos' is RTL.
684 bool const new_pos_is_RTL = paragraph().getFontSettings(
685 buffer()->params(), left_pos).isVisibleRightToLeft();
686 // If the character at 'left_pos' *is* RTL, then in
687 // order to move to the left of it, we need to be
688 // *after* 'left_pos', i.e., move to position
689 // 'left_pos' + 1.
690 if (new_pos_is_RTL) {
691 new_cur.pos() = left_pos + 1;
692 // set the boundary to true in two situations:
693 if (
694 // 1. if new_pos is now lastpos and we're in
695 // an LTR paragraph (this means that we're
696 // moving left to the end of an RTL chunk
697 // which is at the end of an LTR paragraph);
698 (new_cur.pos() == lastpos()
699 && !paragraph().isRTL(buffer()->params()))
700 // 2. if the position *after* left_pos is not
701 // RTL (we want to be *after* left_pos, not
702 // before left_pos + 1!)
703 || !paragraph().getFontSettings(buffer()->params(),
704 new_cur.pos()).isVisibleRightToLeft()
705 )
706 new_cur.boundary(true);
707 else // set the boundary to false
708 new_cur.boundary(false);
709 }
710 // Otherwise (if the character at position 'left_pos'
711 // is LTR), then moving to the left of it is as easy
712 // as setting the new position to 'left_pos'.
713 else {
714 new_cur.pos() = left_pos;
715 new_cur.boundary(false);
716 }
717
718 }
719
720 bool const moved = new_cur != *this || new_cur.boundary() != boundary();
721
722 if (moved) {
723 LYXERR(Debug::RTL, "moving to: " << new_cur.pos()
724 << (new_cur.boundary() ? " (boundary)" : ""));
725 *this = new_cur;
726 }
727
728 return moved;
729 }
730
731
732 namespace {
733
734 // Return true on success
findNonVirtual(Row const & row,Row::const_iterator & cit,bool onleft)735 bool findNonVirtual(Row const & row, Row::const_iterator & cit, bool onleft)
736 {
737 if (onleft) {
738 while (cit != row.begin() && cit->isVirtual())
739 --cit;
740 } else {
741 while (cit != row.end() && cit->isVirtual())
742 ++cit;
743 }
744 return cit != row.end() && !cit->isVirtual();
745 }
746
747 } // namespace
748
getSurroundingPos(pos_type & left_pos,pos_type & right_pos) const749 void Cursor::getSurroundingPos(pos_type & left_pos, pos_type & right_pos) const
750 {
751 // by default, we know nothing.
752 left_pos = -1;
753 right_pos = -1;
754
755 Row const & row = textRow();
756 double dummy = 0;
757 Row::const_iterator cit = row.findElement(pos(), boundary(), dummy);
758 // Handle the case of empty row
759 if (cit == row.end()) {
760 if (row.isRTL())
761 right_pos = row.pos();
762 else
763 left_pos = row.pos() - 1;
764 return;
765 }
766
767 // skip virtual elements and exit if no non-virtual one exists
768 if (!findNonVirtual(row, cit, !cit->isRTL()))
769 return;
770
771 // if the position is at the left side of the element, we have to
772 // look at the previous element
773 if (pos() == cit->left_pos()) {
774 LYXERR(Debug::RTL, "getSurroundingPos(" << pos() << (boundary() ? "b" : "")
775 << "), AT LEFT of *cit=" << *cit);
776 // this one is easy (see common case below)
777 right_pos = pos() - (cit->isRTL() ? 1 : 0);
778 // at the left of the row
779 if (cit == row.begin())
780 return;
781 --cit;
782 if (!findNonVirtual(row, cit, true))
783 return;
784 // [...[ is the row element, | is cursor position (! with boundary)
785 // [ 1 2 [ is a ltr row element with pos=1 and endpos=3
786 // ] 2 1] is an rtl row element with pos=1 and endpos=3
787 // [ 1 2 [ [|3 4 [ => (2, 3)
788 // or [ 1 2 [ ]!4 3 ] => (2, 4)
789 // or ] 2 1 ] [|3 4 [ => (1, 3)
790 // or ] 4 3 ] ]!2 1 ] => (3, 2)
791 left_pos = cit->right_pos() - (cit->isRTL() ? 0 : 1);
792 // happens with consecutive row of same direction
793 if (left_pos == right_pos) {
794 left_pos += cit->isRTL() ? 1 : -1;
795 }
796 }
797 // same code but with the element at the right
798 else if (pos() == cit->right_pos()) {
799 LYXERR(Debug::RTL, "getSurroundingPos(" << pos() << (boundary() ? "b" : "")
800 << "), AT RIGHT of *cit=" << *cit);
801 // this one is easy (see common case below)
802 left_pos = pos() - (cit->isRTL() ? 0 : 1);
803 // at the right of the row
804 if (cit + 1 == row.end())
805 return;
806 ++cit;
807 if (!findNonVirtual(row, cit, false))
808 return;
809 // [ 1 2![ [ 3 4 [ => (2, 3)
810 // or [ 1 2![ ] 4 3 ] => (2, 4)
811 // or ] 2 1|] [ 3 4 [ => (1, 3)
812 // or ] 4 3|] ] 2 1 ] => (3, 2)
813 right_pos = cit->left_pos() - (cit->isRTL() ? 1 : 0);
814 // happens with consecutive row of same direction
815 if (right_pos == left_pos)
816 right_pos += cit->isRTL() ? -1 : 1;
817 }
818 // common case: both positions are inside the row element
819 else {
820 // [ 1 2|3 [ => (2, 3)
821 // or ] 3|2 1 ] => (3, 2)
822 left_pos = pos() - (cit->isRTL() ? 0 : 1);
823 right_pos = pos() - (cit->isRTL() ? 1 : 0);
824 }
825
826 // Note that debug message does not catch all early returns above
827 LYXERR(Debug::RTL,"getSurroundingPos(" << pos() << (boundary() ? "b" : "")
828 << ") => (" << left_pos << ", " << right_pos <<")");
829 }
830
831
posVisToNewRow(bool movingLeft)832 bool Cursor::posVisToNewRow(bool movingLeft)
833 {
834 Row const & row = textRow();
835 bool par_is_LTR = !row.isRTL();
836
837 // Inside a table, determining whether to move to the next or
838 // previous row should be done based on the table's direction.
839 if (inset().asInsetTabular()) {
840 par_is_LTR = !inset().asInsetTabular()->isRightToLeft(*this);
841 LYXERR(Debug::RTL, "Inside table! par_is_LTR=" << (par_is_LTR ? 1 : 0));
842 }
843
844 // if moving left in an LTR paragraph or moving right in an
845 // RTL one, move to previous row
846 if (par_is_LTR == movingLeft) {
847 if (row.pos() == 0) { // we're at first row in paragraph
848 if (pit() == 0) // no previous paragraph! don't move
849 return false;
850 // move to last pos in previous par
851 --pit();
852 pos() = lastpos();
853 boundary(false);
854 } else { // move to previous row in this par
855 pos() = row.pos() - 1; // this is guaranteed to be in previous row
856 boundary(false);
857 }
858 }
859 // if moving left in an RTL paragraph or moving right in an
860 // LTR one, move to next row
861 else {
862 if (row.endpos() == lastpos()) { // we're at last row in paragraph
863 if (pit() == lastpit()) // last paragraph! don't move
864 return false;
865 // move to first row in next par
866 ++pit();
867 pos() = 0;
868 boundary(false);
869 } else { // move to next row in this par
870 pos() = row.endpos();
871 boundary(false);
872 }
873 }
874
875 // make sure we're at left-/right-most pos in new row
876 posVisToRowExtremity(!movingLeft);
877
878 return true;
879 }
880
881
posVisToRowExtremity(bool left)882 void Cursor::posVisToRowExtremity(bool left)
883 {
884 LYXERR(Debug::RTL, "entering extremity: " << pit() << "," << pos() << ","
885 << (boundary() ? 1 : 0));
886
887 TextMetrics const & tm = bv_->textMetrics(text());
888 // Looking for extremities is like clicking on the left or the
889 // right of the row.
890 int x = tm.origin().x_ + (left ? 0 : textRow().width());
891 bool b = false;
892 pos() = tm.getPosNearX(textRow(), x, b);
893 boundary(b);
894
895 LYXERR(Debug::RTL, "leaving extremity: " << pit() << "," << pos() << ","
896 << (boundary() ? 1 : 0));
897 }
898
899
reverseDirectionNeeded() const900 bool Cursor::reverseDirectionNeeded() const
901 {
902 /*
903 * We determine the directions based on the direction of the
904 * bottom() --- i.e., outermost --- paragraph, because that is
905 * the only way to achieve consistency of the arrow's movements
906 * within a paragraph, and thus avoid situations in which the
907 * cursor gets stuck.
908 */
909 return bottom().paragraph().isRTL(bv().buffer().params());
910 }
911
912
normalAnchor() const913 CursorSlice Cursor::normalAnchor() const
914 {
915 if (!selection())
916 return top();
917 // LASSERT: There have been several bugs around this code, that seem
918 // to involve failures to reset the anchor. We can at least not crash
919 // in release mode by resetting it ourselves.
920 if (anchor_.depth() < depth()) {
921 LYXERR0("Cursor is deeper than anchor. PLEASE REPORT.\nCursor is"
922 << *this);
923 const_cast<DocIterator &>(anchor_) = *this;
924 }
925
926 CursorSlice normal = anchor_[depth() - 1];
927 if (depth() < anchor_.depth() && top() <= normal) {
928 // anchor is behind cursor -> move anchor behind the inset
929 ++normal.pos();
930 }
931 return normal;
932 }
933
934
selBegin() const935 CursorSlice Cursor::selBegin() const
936 {
937 if (!selection())
938 return top();
939 return normalAnchor() < top() ? normalAnchor() : top();
940 }
941
942
selEnd() const943 CursorSlice Cursor::selEnd() const
944 {
945 if (!selection())
946 return top();
947 return normalAnchor() > top() ? normalAnchor() : top();
948 }
949
950
selectionBegin() const951 DocIterator Cursor::selectionBegin() const
952 {
953 if (!selection())
954 return *this;
955
956 DocIterator di;
957 // FIXME: This is a work-around for the problem that
958 // CursorSlice doesn't keep track of the boundary.
959 if (normalAnchor() == top())
960 di = anchor_.boundary() > boundary() ? anchor_ : *this;
961 else
962 di = normalAnchor() < top() ? anchor_ : *this;
963 di.resize(depth());
964 return di;
965 }
966
967
selectionEnd() const968 DocIterator Cursor::selectionEnd() const
969 {
970 if (!selection())
971 return *this;
972
973 DocIterator di;
974 // FIXME: This is a work-around for the problem that
975 // CursorSlice doesn't keep track of the boundary.
976 if (normalAnchor() == top())
977 di = anchor_.boundary() < boundary() ? anchor_ : *this;
978 else
979 di = normalAnchor() > top() ? anchor_ : *this;
980
981 if (di.depth() > depth()) {
982 di.resize(depth());
983 ++di.pos();
984 }
985 return di;
986 }
987
988
setSelection()989 void Cursor::setSelection()
990 {
991 selection(true);
992 if (idx() == normalAnchor().idx() &&
993 pit() == normalAnchor().pit() &&
994 pos() == normalAnchor().pos())
995 selection(false);
996 }
997
998
setSelection(DocIterator const & where,int n)999 void Cursor::setSelection(DocIterator const & where, int n)
1000 {
1001 setCursor(where);
1002 selection(true);
1003 anchor_ = where;
1004 pos() += n;
1005 }
1006
1007
clearSelection()1008 void Cursor::clearSelection()
1009 {
1010 selection(false);
1011 setWordSelection(false);
1012 setMark(false);
1013 resetAnchor();
1014 }
1015
1016
countInsetsInSelection(InsetCode const & inset_code)1017 int Cursor::countInsetsInSelection(InsetCode const & inset_code)
1018 {
1019 if (!selection_)
1020 return 0;
1021
1022 DocIterator from, to;
1023 from = selectionBegin();
1024 to = selectionEnd();
1025
1026 int count = 0;
1027
1028 if (!from.nextInset()) //move to closest inset
1029 from.forwardInset();
1030
1031 while (!from.empty() && from < to) {
1032 Inset * inset = from.nextInset();
1033 if (!inset)
1034 break;
1035 if (inset->lyxCode() == inset_code)
1036 count ++;
1037 from.forwardInset();
1038 }
1039 return count;
1040 }
1041
1042
insetInSelection(InsetCode const & inset_code)1043 bool Cursor::insetInSelection(InsetCode const & inset_code)
1044 {
1045 if (!selection_)
1046 return false;
1047
1048 DocIterator from, to;
1049 from = selectionBegin();
1050 to = selectionEnd();
1051
1052 if (!from.nextInset()) //move to closest inset
1053 from.forwardInset();
1054
1055 while (!from.empty() && from < to) {
1056 Inset * inset = from.nextInset();
1057 if (!inset)
1058 break;
1059 if (inset->lyxCode() == inset_code)
1060 return true;
1061 from.forwardInset();
1062 }
1063 return false;
1064 }
1065
1066
setTargetX(int x)1067 void Cursor::setTargetX(int x)
1068 {
1069 x_target_ = x;
1070 textTargetOffset_ = 0;
1071 }
1072
1073
x_target() const1074 int Cursor::x_target() const
1075 {
1076 return x_target_;
1077 }
1078
1079
clearTargetX()1080 void Cursor::clearTargetX()
1081 {
1082 x_target_ = -1;
1083 textTargetOffset_ = 0;
1084 }
1085
1086
updateTextTargetOffset()1087 void Cursor::updateTextTargetOffset()
1088 {
1089 int x;
1090 int y;
1091 getPos(x, y);
1092 textTargetOffset_ = x - x_target_;
1093 }
1094
1095
info(odocstream & os,bool devel_mode) const1096 void Cursor::info(odocstream & os, bool devel_mode) const
1097 {
1098 for (int i = 1, n = depth(); i < n; ++i) {
1099 operator[](i).inset().infoize(os);
1100 os << " ";
1101 }
1102 if (pos() != 0) {
1103 Inset const * inset = prevInset();
1104 // prevInset() can return 0 in certain case.
1105 if (inset)
1106 prevInset()->infoize2(os);
1107 }
1108 if (devel_mode) {
1109 InsetMath * math = inset().asInsetMath();
1110 if (math)
1111 os << _(", Inset: ") << math->id();
1112 os << _(", Cell: ") << idx();
1113 os << _(", Position: ") << pos();
1114 }
1115
1116 }
1117
1118
selHandle(bool sel)1119 bool Cursor::selHandle(bool sel)
1120 {
1121 //lyxerr << "Cursor::selHandle" << endl;
1122 if (mark())
1123 sel = true;
1124 if (sel == selection())
1125 return false;
1126
1127 if (!sel)
1128 cap::saveSelection(*this);
1129
1130 resetAnchor();
1131 selection(sel);
1132 return true;
1133 }
1134 } // namespace lyx
1135
1136
1137 ///////////////////////////////////////////////////////////////////
1138 //
1139 // FIXME: Look here
1140 // The part below is the non-integrated rest of the original math
1141 // cursor. This should be either generalized for texted or moved
1142 // back to mathed (in most cases to InsetMathNest).
1143 //
1144 ///////////////////////////////////////////////////////////////////
1145
1146 #include "mathed/InsetMathChar.h"
1147 #include "mathed/InsetMathGrid.h"
1148 #include "mathed/InsetMathScript.h"
1149 #include "mathed/InsetMathUnknown.h"
1150 #include "mathed/MathFactory.h"
1151 #include "mathed/MathStream.h"
1152 #include "mathed/MathSupport.h"
1153
1154
1155 namespace lyx {
1156
isInside(Inset const * p) const1157 bool Cursor::isInside(Inset const * p) const
1158 {
1159 for (size_t i = 0; i != depth(); ++i)
1160 if (&operator[](i).inset() == p)
1161 return true;
1162 return false;
1163 }
1164
1165
leaveInset(Inset const & inset)1166 void Cursor::leaveInset(Inset const & inset)
1167 {
1168 for (size_t i = 0; i != depth(); ++i) {
1169 if (&operator[](i).inset() == &inset) {
1170 resize(i);
1171 return;
1172 }
1173 }
1174 }
1175
1176
openable(MathAtom const & t) const1177 bool Cursor::openable(MathAtom const & t) const
1178 {
1179 if (!t->isActive())
1180 return false;
1181
1182 if (t->lock())
1183 return false;
1184
1185 if (!selection())
1186 return true;
1187
1188 // we can't move into anything new during selection
1189 if (depth() >= anchor_.depth())
1190 return false;
1191 if (t.nucleus() != &anchor_[depth()].inset())
1192 return false;
1193
1194 return true;
1195 }
1196
1197
setScreenPos(int x,int)1198 void Cursor::setScreenPos(int x, int /*y*/)
1199 {
1200 setTargetX(x);
1201 //bruteFind(*this, x, y, 0, bv().workWidth(), 0, bv().workHeight());
1202 }
1203
1204
1205
plainErase()1206 void Cursor::plainErase()
1207 {
1208 cell().erase(pos());
1209 }
1210
1211
markInsert()1212 void Cursor::markInsert()
1213 {
1214 insert(char_type(0));
1215 }
1216
1217
markErase()1218 void Cursor::markErase()
1219 {
1220 cell().erase(pos());
1221 }
1222
1223
plainInsert(MathAtom const & t)1224 void Cursor::plainInsert(MathAtom const & t)
1225 {
1226 cell().insert(pos(), t);
1227 ++pos();
1228 inset().setBuffer(bv_->buffer());
1229 inset().initView();
1230 checkBufferStructure();
1231 }
1232
1233
insert(docstring const & str)1234 void Cursor::insert(docstring const & str)
1235 {
1236 for (char_type c : str)
1237 insert(c);
1238 }
1239
1240
insert(char_type c)1241 void Cursor::insert(char_type c)
1242 {
1243 //lyxerr << "Cursor::insert char '" << c << "'" << endl;
1244 LASSERT(!empty(), return);
1245 if (inMathed()) {
1246 cap::selClearOrDel(*this);
1247 insert(new InsetMathChar(c));
1248 } else {
1249 text()->insertChar(*this, c);
1250 }
1251 }
1252
1253
insert(MathAtom const & t)1254 void Cursor::insert(MathAtom const & t)
1255 {
1256 //lyxerr << "Cursor::insert MathAtom '" << t << "'" << endl;
1257 macroModeClose();
1258 cap::selClearOrDel(*this);
1259 plainInsert(t);
1260 }
1261
1262
insert(Inset * inset0)1263 void Cursor::insert(Inset * inset0)
1264 {
1265 LASSERT(inset0, return);
1266 if (inMathed())
1267 insert(MathAtom(inset0->asInsetMath()));
1268 else {
1269 text()->insertInset(*this, inset0);
1270 inset0->setBuffer(bv_->buffer());
1271 inset0->initView();
1272 if (inset0->isLabeled())
1273 forceBufferUpdate();
1274 }
1275 }
1276
1277
niceInsert(docstring const & t,Parse::flags f,bool enter)1278 int Cursor::niceInsert(docstring const & t, Parse::flags f, bool enter)
1279 {
1280 MathData ar(buffer());
1281 asArray(t, ar, f);
1282 if (ar.size() == 1 && (enter || selection()))
1283 niceInsert(ar[0]);
1284 else
1285 insert(ar);
1286 return ar.size();
1287 }
1288
1289
niceInsert(MathAtom const & t)1290 void Cursor::niceInsert(MathAtom const & t)
1291 {
1292 macroModeClose();
1293 docstring const safe = cap::grabAndEraseSelection(*this);
1294 plainInsert(t);
1295 // If possible, enter the new inset and move the contents of the selection
1296 if (t->isActive()) {
1297 posBackward();
1298 // be careful here: don't use 'pushBackward(t)' as this we need to
1299 // push the clone, not the original
1300 pushBackward(*nextInset());
1301 // We may not use niceInsert here (recursion)
1302 MathData ar(buffer());
1303 asArray(safe, ar);
1304 insert(ar);
1305 } else if (t->asMacro() && !safe.empty()) {
1306 MathData ar(buffer());
1307 asArray(safe, ar);
1308 docstring const name = t->asMacro()->name();
1309 MacroData const * data = buffer()->getMacro(name);
1310 if (data && data->numargs() - data->optionals() > 0) {
1311 plainInsert(MathAtom(new InsetMathBrace(ar)));
1312 posBackward();
1313 }
1314 }
1315 }
1316
1317
insert(MathData const & ar)1318 void Cursor::insert(MathData const & ar)
1319 {
1320 macroModeClose();
1321 if (selection())
1322 cap::eraseSelection(*this);
1323 cell().insert(pos(), ar);
1324 pos() += ar.size();
1325 // FIXME audit setBuffer calls
1326 inset().setBuffer(bv_->buffer());
1327 }
1328
1329
backspace(bool const force)1330 bool Cursor::backspace(bool const force)
1331 {
1332 if (selection()) {
1333 cap::eraseSelection(*this);
1334 return true;
1335 }
1336
1337 if (pos() == 0) {
1338 // If empty cell, and not part of a big cell
1339 if (lastpos() == 0 && inset().nargs() == 1) {
1340 popBackward();
1341 // Directly delete empty cell: [|[]] => [|]
1342 if (inMathed()) {
1343 plainErase();
1344 resetAnchor();
1345 return true;
1346 }
1347 // [|], can not delete from inside
1348 return false;
1349 } else {
1350 if (inMathed())
1351 pullArg();
1352 else
1353 popBackward();
1354 return true;
1355 }
1356 }
1357
1358 if (inMacroMode()) {
1359 InsetMathUnknown * p = activeMacro();
1360 if (p->name().size() > 1) {
1361 p->setName(p->name().substr(0, p->name().size() - 1));
1362 return true;
1363 }
1364 }
1365
1366 if (pos() != 0 && !force && prevAtom()->confirmDeletion()) {
1367 // let's require two backspaces for 'big stuff' and
1368 // highlight on the first
1369 resetAnchor();
1370 selection(true);
1371 --pos();
1372 } else {
1373 --pos();
1374 plainErase();
1375 }
1376 return true;
1377 }
1378
1379
erase(bool const force)1380 bool Cursor::erase(bool const force)
1381 {
1382 if (inMacroMode())
1383 return true;
1384
1385 if (selection()) {
1386 cap::eraseSelection(*this);
1387 return true;
1388 }
1389
1390 // delete empty cells if possible
1391 if (pos() == lastpos() && inset().idxDelete(idx()))
1392 return true;
1393
1394 // special behaviour when in last position of cell
1395 if (pos() == lastpos()) {
1396 bool one_cell = inset().nargs() == 1;
1397 if (one_cell && lastpos() == 0) {
1398 popBackward();
1399 // Directly delete empty cell: [|[]] => [|]
1400 if (inMathed()) {
1401 plainErase();
1402 resetAnchor();
1403 return true;
1404 }
1405 // [|], can not delete from inside
1406 return false;
1407 }
1408 // remove markup
1409 if (!one_cell)
1410 inset().idxGlue(idx());
1411 return true;
1412 }
1413
1414 // 'clever' UI hack: only erase large items if previously slected
1415 if (pos() != lastpos() && !force && nextAtom()->confirmDeletion()) {
1416 resetAnchor();
1417 selection(true);
1418 ++pos();
1419 } else {
1420 plainErase();
1421 }
1422
1423 return true;
1424 }
1425
1426
up()1427 bool Cursor::up()
1428 {
1429 macroModeClose();
1430 DocIterator save = *this;
1431 FuncRequest cmd(selection() ? LFUN_UP_SELECT : LFUN_UP, docstring());
1432 this->dispatch(cmd);
1433 if (disp_.dispatched())
1434 return true;
1435 setCursor(save);
1436 return false;
1437 }
1438
1439
down()1440 bool Cursor::down()
1441 {
1442 macroModeClose();
1443 DocIterator save = *this;
1444 FuncRequest cmd(selection() ? LFUN_DOWN_SELECT : LFUN_DOWN, docstring());
1445 this->dispatch(cmd);
1446 if (disp_.dispatched())
1447 return true;
1448 setCursor(save);
1449 return false;
1450 }
1451
1452
macroModeClose(bool cancel)1453 bool Cursor::macroModeClose(bool cancel)
1454 {
1455 if (!inMacroMode())
1456 return false;
1457 InsetMathUnknown * p = activeMacro();
1458 p->finalize();
1459 MathData selection(buffer());
1460 asArray(p->selection(), selection);
1461 docstring const s = p->name();
1462 --pos();
1463 cell().erase(pos());
1464
1465 // trigger updates of macros, at least, if no full
1466 // updates take place anyway
1467 screenUpdateFlags(Update::Force);
1468
1469 // do nothing if the macro name is empty
1470 if (s == "\\" || cancel) {
1471 return false;
1472 }
1473
1474 docstring const name = s.substr(1);
1475 InsetMathNest * const in = inset().asInsetMath()->asNestInset();
1476 if (in && in->interpretString(*this, s))
1477 return true;
1478 bool const user_macro = buffer()->getMacro(name, *this, false);
1479 MathAtom atom = user_macro ? MathAtom(new InsetMathMacro(buffer(), name))
1480 : createInsetMath(name, buffer());
1481
1482 // try to put argument into macro, if we just inserted a macro
1483 bool macroArg = false;
1484 InsetMathMacro * atomAsMacro = atom.nucleus()->asMacro();
1485 if (atomAsMacro) {
1486 // macros here are still unfolded (in init mode in fact). So
1487 // we have to resolve the macro here manually and check its arity
1488 // to put the selection behind it if arity > 0.
1489 MacroData const * data = buffer()->getMacro(atomAsMacro->name());
1490 if (!selection.empty() && data && data->numargs()) {
1491 macroArg = true;
1492 atomAsMacro->setDisplayMode(InsetMathMacro::DISPLAY_INTERACTIVE_INIT, 1);
1493 } else
1494 // non-greedy case. Do not touch the arguments behind
1495 atomAsMacro->setDisplayMode(InsetMathMacro::DISPLAY_INTERACTIVE_INIT, 0);
1496 }
1497
1498 // insert remembered selection into first argument of a non-macro
1499 else if (atom.nucleus()->nargs() > 0)
1500 atom.nucleus()->cell(0).append(selection);
1501
1502 MathWordList const & words = mathedWordList();
1503 MathWordList::const_iterator it = words.find(name);
1504 bool keep_mathmode = user_macro
1505 || (it != words.end() && (it->second.inset == "font"
1506 || it->second.inset == "oldfont"
1507 || it->second.inset == "mbox"));
1508 bool ert_macro = !user_macro && it == words.end() && atomAsMacro;
1509
1510 if (in && in->currentMode() == Inset::TEXT_MODE
1511 && atom.nucleus()->currentMode() == Inset::MATH_MODE
1512 && name != from_ascii("ensuremath") && !ert_macro) {
1513 MathAtom at(new InsetMathEnsureMath(buffer()));
1514 at.nucleus()->cell(0).push_back(atom);
1515 niceInsert(at);
1516 posForward();
1517 } else if (in && in->currentMode() == Inset::MATH_MODE
1518 && atom.nucleus()->currentMode() == Inset::TEXT_MODE
1519 && !keep_mathmode) {
1520 MathAtom at = createInsetMath("text", buffer());
1521 at.nucleus()->cell(0).push_back(atom);
1522 niceInsert(at);
1523 posForward();
1524 } else
1525 plainInsert(atom);
1526
1527 // finally put the macro argument behind, if needed
1528 if (macroArg) {
1529 if (selection.size() > 1 || selection[0]->asScriptInset())
1530 plainInsert(MathAtom(new InsetMathBrace(selection)));
1531 else
1532 insert(selection);
1533 }
1534
1535 return true;
1536 }
1537
1538
macroName()1539 docstring Cursor::macroName()
1540 {
1541 return inMacroMode() ? activeMacro()->name() : docstring();
1542 }
1543
1544
handleNest(MathAtom const & a,int c)1545 void Cursor::handleNest(MathAtom const & a, int c)
1546 {
1547 //lyxerr << "Cursor::handleNest: " << c << endl;
1548 MathAtom t = a;
1549 asArray(cap::grabAndEraseSelection(*this), t.nucleus()->cell(c));
1550 insert(t);
1551 posBackward();
1552 pushBackward(*nextInset());
1553 }
1554
1555
targetX() const1556 int Cursor::targetX() const
1557 {
1558 if (x_target() != -1)
1559 return x_target();
1560 int x = 0;
1561 int y = 0;
1562 getPos(x, y);
1563 return x;
1564 }
1565
1566
textTargetOffset() const1567 int Cursor::textTargetOffset() const
1568 {
1569 return textTargetOffset_;
1570 }
1571
1572
setTargetX()1573 void Cursor::setTargetX()
1574 {
1575 int x;
1576 int y;
1577 getPos(x, y);
1578 setTargetX(x);
1579 }
1580
1581
inMacroMode() const1582 bool Cursor::inMacroMode() const
1583 {
1584 if (!inMathed())
1585 return false;
1586 if (pos() == 0 || cell().empty())
1587 return false;
1588 InsetMathUnknown const * p = prevAtom()->asUnknownInset();
1589 return p && !p->final();
1590 }
1591
1592
activeMacro()1593 InsetMathUnknown * Cursor::activeMacro()
1594 {
1595 return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
1596 }
1597
1598
activeMacro() const1599 InsetMathUnknown const * Cursor::activeMacro() const
1600 {
1601 return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
1602 }
1603
1604
pullArg()1605 void Cursor::pullArg()
1606 {
1607 // FIXME: Look here
1608 MathData ar = cell();
1609 if (popBackward() && inMathed()) {
1610 plainErase();
1611 cell().insert(pos(), ar);
1612 resetAnchor();
1613 } else {
1614 //formula()->mutateToText();
1615 }
1616 }
1617
1618
touch()1619 void Cursor::touch()
1620 {
1621 // FIXME: look here
1622 #if 0
1623 DocIterator::const_iterator it = begin();
1624 DocIterator::const_iterator et = end();
1625 for ( ; it != et; ++it)
1626 it->cell().touch();
1627 #endif
1628 }
1629
1630
normalize()1631 void Cursor::normalize()
1632 {
1633 if (idx() > lastidx()) {
1634 lyxerr << "this should not really happen - 1: "
1635 << idx() << ' ' << nargs()
1636 << " in: " << &inset() << endl;
1637 idx() = lastidx();
1638 }
1639
1640 if (pos() > lastpos()) {
1641 lyxerr << "this should not really happen - 2: "
1642 << pos() << ' ' << lastpos() << " in idx: " << idx()
1643 << " in atom: '";
1644 odocstringstream os;
1645 otexrowstream ots(os);
1646 WriteStream wi(ots, false, true, WriteStream::wsDefault);
1647 inset().asInsetMath()->write(wi);
1648 lyxerr << to_utf8(os.str()) << endl;
1649 pos() = lastpos();
1650 }
1651 }
1652
1653
upDownInMath(bool up)1654 bool Cursor::upDownInMath(bool up)
1655 {
1656 // Be warned: The 'logic' implemented in this function is highly
1657 // fragile. A distance of one pixel or a '<' vs '<=' _really
1658 // matters. So fiddle around with it only if you think you know
1659 // what you are doing!
1660 int xo = 0;
1661 int yo = 0;
1662 getPos(xo, yo);
1663 xo = beforeDispatchPosX_;
1664
1665 // check if we had something else in mind, if not, this is the future
1666 // target
1667 if (x_target_ == -1)
1668 setTargetX(xo);
1669 else if (inset().asInsetText() && xo - textTargetOffset() != x_target()) {
1670 // In text mode inside the line (not left or right) possibly set a new target_x,
1671 // but only if we are somewhere else than the previous target-offset.
1672
1673 // We want to keep the x-target on subsequent up/down movements
1674 // that cross beyond the end of short lines. Thus a special
1675 // handling when the cursor is at the end of line: Use the new
1676 // x-target only if the old one was before the end of line
1677 // or the old one was after the beginning of the line
1678 bool inRTL = innerParagraph().isRTL(bv().buffer().params());
1679 bool left;
1680 bool right;
1681 if (inRTL) {
1682 left = pos() == textRow().endpos();
1683 right = pos() == textRow().pos();
1684 } else {
1685 left = pos() == textRow().pos();
1686 right = pos() == textRow().endpos();
1687 }
1688 if ((!left && !right) ||
1689 (left && !right && xo < x_target_) ||
1690 (!left && right && x_target_ < xo))
1691 setTargetX(xo);
1692 else
1693 xo = targetX();
1694 } else
1695 xo = targetX();
1696
1697 // try neigbouring script insets
1698 Cursor old = *this;
1699 if (inMathed() && !selection()) {
1700 // try left
1701 if (pos() != 0) {
1702 InsetMathScript const * p = prevAtom()->asScriptInset();
1703 if (p && p->has(up)) {
1704 --pos();
1705 push(*const_cast<InsetMathScript*>(p));
1706 idx() = p->idxOfScript(up);
1707 pos() = lastpos();
1708
1709 // we went in the right direction? Otherwise don't jump into the script
1710 int x;
1711 int y;
1712 getPos(x, y);
1713 int oy = beforeDispatchPosY_;
1714 if ((!up && y <= oy) ||
1715 (up && y >= oy))
1716 operator=(old);
1717 else
1718 return true;
1719 }
1720 }
1721
1722 // try right
1723 if (pos() != lastpos()) {
1724 InsetMathScript const * p = nextAtom()->asScriptInset();
1725 if (p && p->has(up)) {
1726 push(*const_cast<InsetMathScript*>(p));
1727 idx() = p->idxOfScript(up);
1728 pos() = 0;
1729
1730 // we went in the right direction? Otherwise don't jump into the script
1731 int x;
1732 int y;
1733 getPos(x, y);
1734 int oy = beforeDispatchPosY_;
1735 if ((!up && y <= oy) ||
1736 (up && y >= oy))
1737 operator=(old);
1738 else
1739 return true;
1740 }
1741 }
1742 }
1743
1744 // try to find an inset that knows better then we,
1745 if (inset().idxUpDown(*this, up)) {
1746 //lyxerr << "idxUpDown triggered" << endl;
1747 // try to find best position within this inset
1748 if (!selection())
1749 setCursor(bruteFind(*this, xo, yo));
1750 return true;
1751 }
1752
1753 // any improvement going just out of inset?
1754 if (popBackward() && inMathed()) {
1755 //lyxerr << "updown: popBackward succeeded" << endl;
1756 int xnew;
1757 int ynew;
1758 int yold = beforeDispatchPosY_;
1759 getPos(xnew, ynew);
1760 if (up ? ynew < yold : ynew > yold)
1761 return true;
1762 }
1763
1764 // no success, we are probably at the document top or bottom
1765 operator=(old);
1766 return false;
1767 }
1768
1769
nextMath()1770 InsetMath & Cursor::nextMath()
1771 {
1772 return *nextAtom().nucleus();
1773 }
1774
1775
prevMath()1776 InsetMath & Cursor::prevMath()
1777 {
1778 return *prevAtom().nucleus();
1779 }
1780
1781
mathForward(bool word)1782 bool Cursor::mathForward(bool word)
1783 {
1784 LASSERT(inMathed(), return false);
1785 if (pos() < lastpos()) {
1786 if (word) {
1787 // word: skip a group of insets of the form X*(B*|R*|P*) (greedy
1788 // match) where X is any math class, B is mathbin, R is mathrel, and
1789 // P is mathpunct. Make sure that the following remains true:
1790 // mathForward(true); mathBackward(true); mathForward(true)
1791 // is the same as mathForward(true) and
1792 // mathBackward(true); mathForward(true); mathBackward(true)
1793 // is the same as mathBackward(true).
1794 MathClass mc = nextMath().mathClass();
1795 do
1796 posForward();
1797 while (pos() < lastpos() && mc == nextMath().mathClass());
1798 if (pos() < lastpos() &&
1799 ((mc = nextMath().mathClass()) == MC_BIN ||
1800 mc == MC_REL || mc == MC_PUNCT))
1801 do
1802 posForward();
1803 while (pos() < lastpos() && mc == nextMath().mathClass());
1804 } else if (openable(nextAtom())) {
1805 // single step: try to enter the next inset
1806 pushBackward(nextMath());
1807 inset().idxFirst(*this);
1808 } else
1809 posForward();
1810 return true;
1811 }
1812 if (inset().idxForward(*this))
1813 return true;
1814 // try to pop forwards --- but don't pop out of math! leave that to
1815 // the FINISH lfuns
1816 int s = depth() - 2;
1817 if (s >= 0 && operator[](s).inset().asInsetMath())
1818 return popForward();
1819 return false;
1820 }
1821
1822
mathBackward(bool word)1823 bool Cursor::mathBackward(bool word)
1824 {
1825 LASSERT(inMathed(), return false);
1826 if (pos() > 0) {
1827 if (word) {
1828 // word: skip a group of insets. See the comment in mathForward.
1829 MathClass mc = prevMath().mathClass();
1830 do
1831 posBackward();
1832 while (pos() > 0 && mc == prevMath().mathClass());
1833 if (pos() > 0 && (mc == MC_BIN || mc == MC_REL || mc == MC_PUNCT)) {
1834 mc = prevMath().mathClass();
1835 do
1836 posBackward();
1837 while (pos() > 0 && mc == prevMath().mathClass());
1838 }
1839 } else if (openable(prevAtom())) {
1840 // single step: try to enter the preceding inset
1841 posBackward();
1842 push(nextMath());
1843 inset().idxLast(*this);
1844 } else
1845 posBackward();
1846 return true;
1847 }
1848 if (inset().idxBackward(*this))
1849 return true;
1850 // try to pop backwards --- but don't pop out of math! leave that to
1851 // the FINISH lfuns
1852 int s = depth() - 2;
1853 if (s >= 0 && operator[](s).inset().asInsetMath())
1854 return popBackward();
1855 return false;
1856 }
1857
1858
atFirstOrLastRow(bool up)1859 bool Cursor::atFirstOrLastRow(bool up)
1860 {
1861 TextMetrics const & tm = bv_->textMetrics(text());
1862 ParagraphMetrics const & pm = tm.parMetrics(pit());
1863
1864 int row;
1865 if (pos() && boundary())
1866 row = pm.pos2row(pos() - 1);
1867 else
1868 row = pm.pos2row(pos());
1869
1870 if (up) {
1871 if (pit() == 0 && row == 0)
1872 return true;
1873 } else {
1874 if (pit() + 1 >= int(text()->paragraphs().size()) &&
1875 row + 1 >= int(pm.rows().size()))
1876 return true;
1877 }
1878 return false;
1879 }
1880
1881
upDownInText(bool up,bool & updateNeeded)1882 bool Cursor::upDownInText(bool up, bool & updateNeeded)
1883 {
1884 LASSERT(text(), return false);
1885
1886 // where are we?
1887 int xo = 0;
1888 int yo = 0;
1889 getPos(xo, yo);
1890 xo = beforeDispatchPosX_;
1891
1892 // update the targetX - this is here before the "return false"
1893 // to set a new target which can be used by InsetTexts above
1894 // if we cannot move up/down inside this inset anymore
1895 if (x_target_ == -1)
1896 setTargetX(xo);
1897 else if (xo - textTargetOffset() != x_target() &&
1898 depth() == beforeDispatchCursor_.depth()) {
1899 // In text mode inside the line (not left or right)
1900 // possibly set a new target_x, but only if we are
1901 // somewhere else than the previous target-offset.
1902
1903 // We want to keep the x-target on subsequent up/down
1904 // movements that cross beyond the end of short lines.
1905 // Thus a special handling when the cursor is at the
1906 // end of line: Use the new x-target only if the old
1907 // one was before the end of line or the old one was
1908 // after the beginning of the line
1909 bool inRTL = innerParagraph().isRTL(bv().buffer().params());
1910 bool left;
1911 bool right;
1912 if (inRTL) {
1913 left = pos() == textRow().endpos();
1914 right = pos() == textRow().pos();
1915 } else {
1916 left = pos() == textRow().pos();
1917 right = pos() == textRow().endpos();
1918 }
1919 if ((!left && !right) ||
1920 (left && !right && xo < x_target_) ||
1921 (!left && right && x_target_ < xo))
1922 setTargetX(xo);
1923 else
1924 xo = targetX();
1925 } else
1926 xo = targetX();
1927
1928 // first get the current line
1929 TextMetrics & tm = bv_->textMetrics(text());
1930 ParagraphMetrics const & pm = tm.parMetrics(pit());
1931 int row;
1932 if (pos() && boundary())
1933 row = pm.pos2row(pos() - 1);
1934 else
1935 row = pm.pos2row(pos());
1936
1937 if (atFirstOrLastRow(up)) {
1938 // Is there a place for the cursor to go ? If yes, we
1939 // can execute the DEPM, otherwise we should keep the
1940 // paragraph to host the cursor.
1941 Cursor dummy = *this;
1942 bool valid_destination = false;
1943 for(; dummy.depth(); dummy.pop())
1944 if (!dummy.atFirstOrLastRow(up)) {
1945 valid_destination = true;
1946 break;
1947 }
1948
1949 // will a next dispatch follow and if there is a new
1950 // dispatch will it move the cursor out ?
1951 if (depth() > 1 && valid_destination) {
1952 // The cursor hasn't changed yet. This happens when
1953 // you e.g. move out of an inset. And to give the
1954 // DEPM the possibility of doing something we must
1955 // provide it with two different cursors. (Lgb, vfr)
1956 dummy = *this;
1957 dummy.pos() = dummy.pos() == 0 ? dummy.lastpos() : 0;
1958 dummy.pit() = dummy.pit() == 0 ? dummy.lastpit() : 0;
1959
1960 updateNeeded |= bv().checkDepm(dummy, *this);
1961 updateTextTargetOffset();
1962 if (updateNeeded)
1963 forceBufferUpdate();
1964 }
1965 return false;
1966 }
1967
1968 // with and without selection are handled differently
1969 if (!selection()) {
1970 int yo = bv().getPos(*this).y_;
1971 Cursor old = *this;
1972 // To next/previous row
1973 // FIXME: the y position is often guessed wrongly across styles and
1974 // insets, which leads to weird behaviour.
1975 if (up)
1976 tm.editXY(*this, xo, yo - textRow().ascent() - 1);
1977 else
1978 tm.editXY(*this, xo, yo + textRow().descent() + 1);
1979 x_target_ = old.x_target_;
1980 clearSelection();
1981
1982 // This happens when you move out of an inset.
1983 // And to give the DEPM the possibility of doing
1984 // something we must provide it with two different
1985 // cursors. (Lgb)
1986 Cursor dummy = *this;
1987 if (dummy == old)
1988 ++dummy.pos();
1989 if (bv().checkDepm(dummy, old)) {
1990 updateNeeded = true;
1991 // Make sure that cur gets back whatever happened to dummy (Lgb)
1992 operator=(dummy);
1993 }
1994 if (inTexted() && pos() && paragraph().isEnvSeparator(pos() - 1))
1995 posBackward();
1996 } else {
1997 // if there is a selection, we stay out of any inset,
1998 // and just jump to the right position:
1999 Cursor old = *this;
2000 int next_row = row;
2001 if (up) {
2002 if (row > 0) {
2003 --next_row;
2004 } else if (pit() > 0) {
2005 --pit();
2006 TextMetrics & tm = bv_->textMetrics(text());
2007 if (!tm.contains(pit()))
2008 tm.newParMetricsUp();
2009 ParagraphMetrics const & pmcur = tm.parMetrics(pit());
2010 next_row = pmcur.rows().size() - 1;
2011 }
2012 } else {
2013 if (row + 1 < int(pm.rows().size())) {
2014 ++next_row;
2015 } else if (pit() + 1 < int(text()->paragraphs().size())) {
2016 ++pit();
2017 TextMetrics & tm = bv_->textMetrics(text());
2018 if (!tm.contains(pit()))
2019 tm.newParMetricsDown();
2020 next_row = 0;
2021 }
2022 }
2023
2024 Row const & real_next_row = tm.parMetrics(pit()).rows()[next_row];
2025 bool bound = false;
2026 top().pos() = tm.getPosNearX(real_next_row, xo, bound);
2027 boundary(bound);
2028 // When selection==false, this is done by TextMetrics::editXY
2029 setCurrentFont();
2030
2031 updateNeeded |= bv().checkDepm(*this, old);
2032 }
2033
2034 if (updateNeeded)
2035 forceBufferUpdate();
2036 updateTextTargetOffset();
2037 return true;
2038 }
2039
2040
handleFont(string const & font)2041 void Cursor::handleFont(string const & font)
2042 {
2043 LYXERR(Debug::DEBUG, font);
2044 docstring safe;
2045 if (selection()) {
2046 macroModeClose();
2047 safe = cap::grabAndEraseSelection(*this);
2048 }
2049
2050 recordUndoInset();
2051
2052 if (lastpos() != 0) {
2053 // something left in the cell
2054 if (pos() == 0) {
2055 // cursor in first position
2056 popBackward();
2057 } else if (pos() == lastpos()) {
2058 // cursor in last position
2059 popForward();
2060 } else {
2061 // cursor in between. split cell
2062 MathData::iterator bt = cell().begin();
2063 MathAtom at = createInsetMath(from_utf8(font), buffer());
2064 at.nucleus()->cell(0) = MathData(buffer(), bt, bt + pos());
2065 cell().erase(bt, bt + pos());
2066 popBackward();
2067 plainInsert(at);
2068 }
2069 } else {
2070 // nothing left in the cell
2071 popBackward();
2072 plainErase();
2073 resetAnchor();
2074 }
2075 insert(safe);
2076 }
2077
2078
message(docstring const & msg) const2079 void Cursor::message(docstring const & msg) const
2080 {
2081 disp_.setMessage(msg);
2082 }
2083
2084
errorMessage(docstring const & msg) const2085 void Cursor::errorMessage(docstring const & msg) const
2086 {
2087 disp_.setMessage(msg);
2088 disp_.setError(true);
2089 }
2090
2091
2092 namespace {
2093
parbreak(Cursor const * cur)2094 docstring parbreak(Cursor const * cur)
2095 {
2096 odocstringstream os;
2097 os << '\n';
2098 // only add blank line if we're not in a ParbreakIsNewline situation
2099 if (!cur->inset().getLayout().parbreakIsNewline()
2100 && !cur->paragraph().layout().parbreak_is_newline)
2101 os << '\n';
2102 return os.str();
2103 }
2104
2105 } // namespace
2106
2107
selectionAsString(bool with_label) const2108 docstring Cursor::selectionAsString(bool with_label) const
2109 {
2110 if (!selection())
2111 return docstring();
2112
2113 if (inMathed())
2114 return cap::grabSelection(*this);
2115
2116 int const label = with_label
2117 ? AS_STR_LABEL | AS_STR_INSETS : AS_STR_INSETS;
2118
2119 idx_type const startidx = selBegin().idx();
2120 idx_type const endidx = selEnd().idx();
2121 if (startidx != endidx) {
2122 // multicell selection
2123 InsetTabular * table = inset().asInsetTabular();
2124 LASSERT(table, return docstring());
2125 return table->asString(startidx, endidx);
2126 }
2127
2128 ParagraphList const & pars = text()->paragraphs();
2129
2130 pit_type const startpit = selBegin().pit();
2131 pit_type const endpit = selEnd().pit();
2132 size_t const startpos = selBegin().pos();
2133 size_t const endpos = selEnd().pos();
2134
2135 if (startpit == endpit)
2136 return pars[startpit].asString(startpos, endpos, label);
2137
2138 // First paragraph in selection
2139 docstring result = pars[startpit].
2140 asString(startpos, pars[startpit].size(), label)
2141 + parbreak(this);
2142
2143 // The paragraphs in between (if any)
2144 for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
2145 Paragraph const & par = pars[pit];
2146 result += par.asString(0, par.size(), label)
2147 + parbreak(this);
2148 }
2149
2150 // Last paragraph in selection
2151 result += pars[endpit].asString(0, endpos, label);
2152
2153 return result;
2154 }
2155
2156
currentState(bool devel_mode) const2157 docstring Cursor::currentState(bool devel_mode) const
2158 {
2159 if (inMathed()) {
2160 odocstringstream os;
2161 info(os, devel_mode);
2162 return os.str();
2163 }
2164
2165 if (inTexted())
2166 return text()->currentState(*this, devel_mode);
2167
2168 return docstring();
2169 }
2170
2171
getPossibleLabel() const2172 docstring Cursor::getPossibleLabel() const
2173 {
2174 return inMathed() ? from_ascii("eq:") : text()->getPossibleLabel(*this);
2175 }
2176
2177
undispatched() const2178 void Cursor::undispatched() const
2179 {
2180 disp_.dispatched(false);
2181 }
2182
2183
dispatched() const2184 void Cursor::dispatched() const
2185 {
2186 disp_.dispatched(true);
2187 }
2188
2189
screenUpdateFlags(Update::flags f) const2190 void Cursor::screenUpdateFlags(Update::flags f) const
2191 {
2192 disp_.screenUpdate(f);
2193 }
2194
2195
forceBufferUpdate() const2196 void Cursor::forceBufferUpdate() const
2197 {
2198 disp_.forceBufferUpdate();
2199 }
2200
2201
clearBufferUpdate() const2202 void Cursor::clearBufferUpdate() const
2203 {
2204 disp_.clearBufferUpdate();
2205 }
2206
2207
needBufferUpdate() const2208 bool Cursor::needBufferUpdate() const
2209 {
2210 return disp_.needBufferUpdate();
2211 }
2212
2213
noScreenUpdate() const2214 void Cursor::noScreenUpdate() const
2215 {
2216 disp_.screenUpdate(Update::None);
2217 }
2218
2219
getFont() const2220 Font Cursor::getFont() const
2221 {
2222 // The logic here should more or less match to the
2223 // Cursor::setCurrentFont logic, i.e. the cursor height should
2224 // give a hint what will happen if a character is entered.
2225 // FIXME: this is not the case, what about removing this method ? (see #10478).
2226
2227 // HACK. far from being perfect...
2228
2229 CursorSlice const & sl = innerTextSlice();
2230 Text const & text = *sl.text();
2231 Paragraph const & par = text.getPar(sl.pit());
2232
2233 // on boundary, so we are really at the character before
2234 pos_type pos = sl.pos();
2235 if (pos > 0 && boundary())
2236 --pos;
2237
2238 // on space? Take the font before (only for RTL boundary stay)
2239 if (pos > 0) {
2240 TextMetrics const & tm = bv().textMetrics(&text);
2241 if (pos == sl.lastpos()
2242 || (par.isSeparator(pos)
2243 && !tm.isRTLBoundary(sl.pit(), pos)))
2244 --pos;
2245 }
2246
2247 // get font at the position
2248 Font font = par.getFont(buffer()->params(), pos,
2249 text.outerFont(sl.pit()));
2250
2251 return font;
2252 }
2253
2254
fixIfBroken()2255 bool Cursor::fixIfBroken()
2256 {
2257 bool const broken_cursor = DocIterator::fixIfBroken();
2258 bool const broken_anchor = anchor_.fixIfBroken();
2259
2260 if (broken_cursor || broken_anchor) {
2261 clearNewWordPosition();
2262 clearSelection();
2263 return true;
2264 }
2265 return false;
2266 }
2267
2268
sanitize()2269 void Cursor::sanitize()
2270 {
2271 setBuffer(&bv_->buffer());
2272 DocIterator::sanitize();
2273 new_word_.sanitize();
2274 if (selection())
2275 anchor_.sanitize();
2276 else
2277 resetAnchor();
2278 }
2279
2280
notifyCursorLeavesOrEnters(Cursor const & old,Cursor & cur)2281 bool notifyCursorLeavesOrEnters(Cursor const & old, Cursor & cur)
2282 {
2283 // find inset in common
2284 size_type i;
2285 for (i = 0; i < old.depth() && i < cur.depth(); ++i) {
2286 if (&old[i].inset() != &cur[i].inset())
2287 break;
2288 }
2289
2290 // update words if we just moved to another paragraph
2291 if (i == old.depth() && i == cur.depth()
2292 && !cur.buffer()->isClean()
2293 && cur.inTexted() && old.inTexted()
2294 && cur.pit() != old.pit()) {
2295 old.paragraph().updateWords();
2296 }
2297
2298 // notify everything on top of the common part in old cursor,
2299 // but stop if the inset claims the cursor to be invalid now
2300 for (size_type j = i; j < old.depth(); ++j) {
2301 Cursor inset_pos = old;
2302 inset_pos.cutOff(j);
2303 if (old[j].inset().notifyCursorLeaves(inset_pos, cur))
2304 return true;
2305 }
2306
2307 // notify everything on top of the common part in new cursor,
2308 // but stop if the inset claims the cursor to be invalid now
2309 for (; i < cur.depth(); ++i) {
2310 if (cur[i].inset().notifyCursorEnters(cur))
2311 return true;
2312 }
2313
2314 return false;
2315 }
2316
2317
setCurrentFont()2318 void Cursor::setCurrentFont()
2319 {
2320 CursorSlice const & cs = innerTextSlice();
2321 Paragraph const & par = cs.paragraph();
2322 pos_type cpit = cs.pit();
2323 pos_type cpos = cs.pos();
2324 Text const & ctext = *cs.text();
2325 TextMetrics const & tm = bv().textMetrics(&ctext);
2326
2327 // are we behind previous char in fact? -> go to that char
2328 if (cpos > 0 && boundary())
2329 --cpos;
2330
2331 // find position to take the font from
2332 if (cpos != 0) {
2333 // paragraph end? -> font of last char
2334 if (cpos == lastpos())
2335 --cpos;
2336 // on space? -> look at the words in front of space
2337 else if (cpos > 0 && par.isSeparator(cpos)) {
2338 // abc| def -> font of c
2339 // abc |[WERBEH], i.e. boundary==true -> font of c
2340 // abc [WERBEH]| def, font of the space
2341 if (!tm.isRTLBoundary(cpit, cpos))
2342 --cpos;
2343 }
2344 }
2345
2346 // get font
2347 BufferParams const & bufparams = buffer()->params();
2348 current_font = par.getFontSettings(bufparams, cpos);
2349 real_current_font = tm.displayFont(cpit, cpos);
2350
2351 // special case for paragraph end
2352 if (cs.pos() == lastpos()
2353 && tm.isRTLBoundary(cpit, cs.pos())
2354 && !boundary()) {
2355 Language const * lang = par.getParLanguage(bufparams);
2356 current_font.setLanguage(lang);
2357 current_font.fontInfo().setNumber(FONT_OFF);
2358 real_current_font.setLanguage(lang);
2359 real_current_font.fontInfo().setNumber(FONT_OFF);
2360 }
2361 }
2362
2363
textUndo()2364 bool Cursor::textUndo()
2365 {
2366 if (!buffer()->undo().textUndo(*this))
2367 return false;
2368 sanitize();
2369 return true;
2370 }
2371
2372
textRedo()2373 bool Cursor::textRedo()
2374 {
2375 if (!buffer()->undo().textRedo(*this))
2376 return false;
2377 sanitize();
2378 return true;
2379 }
2380
2381
finishUndo() const2382 void Cursor::finishUndo() const
2383 {
2384 buffer()->undo().finishUndo();
2385 }
2386
2387
beginUndoGroup() const2388 void Cursor::beginUndoGroup() const
2389 {
2390 buffer()->undo().beginUndoGroup(*this);
2391 }
2392
2393
endUndoGroup() const2394 void Cursor::endUndoGroup() const
2395 {
2396 buffer()->undo().endUndoGroup(*this);
2397 }
2398
2399
recordUndo(pit_type from,pit_type to) const2400 void Cursor::recordUndo(pit_type from, pit_type to) const
2401 {
2402 buffer()->undo().recordUndo(*this, from, to);
2403 }
2404
2405
recordUndo(pit_type from) const2406 void Cursor::recordUndo(pit_type from) const
2407 {
2408 buffer()->undo().recordUndo(*this, from, pit());
2409 }
2410
2411
recordUndo(UndoKind kind) const2412 void Cursor::recordUndo(UndoKind kind) const
2413 {
2414 buffer()->undo().recordUndo(*this, kind);
2415 }
2416
2417
recordUndoInset(Inset const * in) const2418 void Cursor::recordUndoInset(Inset const * in) const
2419 {
2420 buffer()->undo().recordUndoInset(*this, in);
2421 }
2422
2423
recordUndoFullBuffer() const2424 void Cursor::recordUndoFullBuffer() const
2425 {
2426 buffer()->undo().recordUndoFullBuffer(*this);
2427 }
2428
2429
recordUndoBufferParams() const2430 void Cursor::recordUndoBufferParams() const
2431 {
2432 buffer()->undo().recordUndoBufferParams(*this);
2433 }
2434
2435
recordUndoSelection() const2436 void Cursor::recordUndoSelection() const
2437 {
2438 if (inMathed()) {
2439 if (cap::multipleCellsSelected(*this))
2440 recordUndoInset();
2441 else
2442 recordUndo();
2443 } else {
2444 buffer()->undo().recordUndo(*this,
2445 selBegin().pit(), selEnd().pit());
2446 }
2447 }
2448
2449
checkBufferStructure()2450 void Cursor::checkBufferStructure()
2451 {
2452 Buffer const * master = buffer()->masterBuffer();
2453 master->tocBackend().updateItem(*this);
2454 if (master != buffer() && !master->hasGuiDelegate())
2455 // In case the master has no gui associated with it,
2456 // the TocItem is not updated (part of bug 5699).
2457 buffer()->tocBackend().updateItem(*this);
2458
2459 // If the last tracked change of the paragraph has just been
2460 // deleted, then we need to recompute the buffer flag
2461 // tracked_changes_present_.
2462 if (inTexted() && paragraph().isChangeUpdateRequired())
2463 disp_.forceChangesUpdate();
2464 }
2465
2466
confirmDeletion(bool const before) const2467 bool Cursor::confirmDeletion(bool const before) const
2468 {
2469 if (!selection()) {
2470 if (Inset const * inset = before ? prevInset() : nextInset())
2471 return inset->confirmDeletion();
2472 } else {
2473 DocIterator dit = selectionBegin();
2474 CursorSlice const end = selectionEnd().top();
2475 for (; dit.top() < end; dit.top().forwardPos())
2476 if (Inset const * inset = dit.nextInset())
2477 if (inset->confirmDeletion())
2478 return true;
2479 }
2480 return false;
2481 }
2482
2483
moveToClosestEdge(int const x,bool const edit)2484 void Cursor::moveToClosestEdge(int const x, bool const edit)
2485 {
2486 if (Inset const * inset = nextInset()) {
2487 // stay in front of insets for which we want to open the dialog
2488 // (e.g. InsetMathSpace).
2489 if (edit && (inset->hasSettings() || !inset->contextMenuName().empty()))
2490 return;
2491 CoordCache::Insets const & insetCache = bv().coordCache().getInsets();
2492 if (!insetCache.has(inset))
2493 return;
2494 int const wid = insetCache.dim(inset).wid;
2495 Point p = insetCache.xy(inset);
2496 if (x > p.x_ + (wid + 1) / 2)
2497 posForward();
2498 }
2499 }
2500
2501
2502 } // namespace lyx
2503