3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Alejandro Aguilar Sierra
7 * \author Alfredo Braunstein
9 * \author Stefan Schimanski
11 * Full author contact details are available in file CREDITS.
17 #include "BufferView.h"
20 #include "CoordCache.h"
21 #include "CutAndPaste.h"
22 #include "DispatchResult.h"
24 #include "FuncRequest.h"
28 #include "LyXFunc.h" // only for setMessage()
32 #include "Paragraph.h"
33 #include "paragraph_funcs.h"
34 #include "ParIterator.h"
35 #include "TextMetrics.h"
37 #include "support/debug.h"
38 #include "support/docstream.h"
40 #include "insets/InsetTabular.h"
41 #include "insets/InsetText.h"
43 #include "mathed/InsetMath.h"
44 #include "mathed/InsetMathScript.h"
45 #include "mathed/MacroTable.h"
46 #include "mathed/MathData.h"
47 #include "mathed/MathMacro.h"
49 #include <boost/assert.hpp>
50 #include <boost/bind.hpp>
67 bool positionable(DocIterator const & cursor, DocIterator const & anchor)
69 // avoid deeper nested insets when selecting
70 if (cursor.depth() > anchor.depth())
73 // anchor might be deeper, should have same path then
74 for (size_t i = 0; i < cursor.depth(); ++i)
75 if (&cursor[i].inset() != &anchor[i].inset())
78 // position should be ok.
83 // Find position closest to (x, y) in cell given by iter.
84 // Used only in mathed
85 DocIterator bruteFind2(Cursor const & c, int x, int y)
87 double best_dist = std::numeric_limits<double>::max();
94 et.top().pos() = et.top().asInsetMath()->cell(et.top().idx()).size();
95 for (size_t i = 0;; ++i) {
98 Inset const * inset = &it.inset();
99 std::map<Inset const *, Geometry> const & data =
100 c.bv().coordCache().getInsets().getData();
101 std::map<Inset const *, Geometry>::const_iterator I = data.find(inset);
103 // FIXME: in the case where the inset is not in the cache, this
104 // means that no part of it is visible on screen. In this case
105 // we don't do elaborate search and we just return the forwarded
106 // DocIterator at its beginning.
107 if (I == data.end()) {
112 Point o = I->second.pos;
113 inset->cursorPos(c.bv(), it.top(), c.boundary(), xo, yo);
114 // Convert to absolute
117 double d = (x - xo) * (x - xo) + (y - yo) * (y - yo);
118 // '<=' in order to take the last possible position
119 // this is important for clicking behind \sum in e.g. '\sum_i a'
120 LYXERR(Debug::DEBUG, "i: " << i << " d: " << d
121 << " best: " << best_dist);
122 if (d <= best_dist) {
135 /// moves position closest to (x, y) in given box
136 bool bruteFind(Cursor & cursor,
137 int x, int y, int xlow, int xhigh, int ylow, int yhigh)
139 BOOST_ASSERT(!cursor.empty());
140 Inset & inset = cursor[0].inset();
141 BufferView & bv = cursor.bv();
143 CoordCache::InnerParPosCache const & cache =
144 bv.coordCache().getParPos().find(cursor.bottom().text())->second;
145 // Get an iterator on the first paragraph in the cache
146 DocIterator it(inset);
147 it.push_back(CursorSlice(inset));
148 it.pit() = cache.begin()->first;
149 // Get an iterator after the last paragraph in the cache
150 DocIterator et(inset);
151 et.push_back(CursorSlice(inset));
152 et.pit() = boost::prior(cache.end())->first;
153 if (et.pit() >= et.lastpit())
154 et = doc_iterator_end(inset);
158 double best_dist = std::numeric_limits<double>::max();;
159 DocIterator best_cursor = et;
161 for ( ; it != et; it.forwardPos(true)) {
162 // avoid invalid nesting when selecting
163 if (!cursor.selection() || positionable(it, cursor.anchor_)) {
164 Point p = bv.getPos(it, false);
167 if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
168 double const dx = xo - x;
169 double const dy = yo - y;
170 double const d = dx * dx + dy * dy;
171 // '<=' in order to take the last possible position
172 // this is important for clicking behind \sum in e.g. '\sum_i a'
173 if (d <= best_dist) {
174 // lyxerr << "*" << endl;
182 if (best_cursor != et) {
183 cursor.setCursor(best_cursor);
192 /// moves position closest to (x, y) in given box
193 bool bruteFind3(Cursor & cur, int x, int y, bool up)
195 BufferView & bv = cur.bv();
196 int ylow = up ? 0 : y + 1;
197 int yhigh = up ? y - 1 : bv.workHeight();
199 int xhigh = bv.workWidth();
201 // FIXME: bit more work needed to get 'from' and 'to' right.
202 pit_type from = cur.bottom().pit();
203 //pit_type to = cur.bottom().pit();
204 //lyxerr << "Pit start: " << from << endl;
206 //lyxerr << "bruteFind3: x: " << x << " y: " << y
207 // << " xlow: " << xlow << " xhigh: " << xhigh
208 // << " ylow: " << ylow << " yhigh: " << yhigh
210 Inset & inset = bv.buffer().inset();
211 DocIterator it = doc_iterator_begin(inset);
213 DocIterator et = doc_iterator_end(inset);
215 double best_dist = std::numeric_limits<double>::max();
216 DocIterator best_cursor = et;
218 for ( ; it != et; it.forwardPos()) {
219 // avoid invalid nesting when selecting
220 if (bv.cursorStatus(it) == CUR_INSIDE
221 && (!cur.selection() || positionable(it, cur.anchor_))) {
222 Point p = bv.getPos(it, false);
225 if (xlow <= xo && xo <= xhigh && ylow <= yo && yo <= yhigh) {
226 double const dx = xo - x;
227 double const dy = yo - y;
228 double const d = dx * dx + dy * dy;
229 //lyxerr << "itx: " << xo << " ity: " << yo << " d: " << d
230 // << " dx: " << dx << " dy: " << dy
231 // << " idx: " << it.idx() << " pos: " << it.pos()
234 // '<=' in order to take the last possible position
235 // this is important for clicking behind \sum in e.g. '\sum_i a'
236 if (d <= best_dist) {
237 //lyxerr << "*" << endl;
245 //lyxerr << "best_dist: " << best_dist << " cur:\n" << best_cursor << endl;
246 if (best_cursor == et)
248 cur.setCursor(best_cursor);
252 docstring parbreak(Paragraph const & par)
254 odocstringstream ods;
256 // only add blank line if we're not in an ERT or Listings inset
257 if (par.ownerCode() != ERT_CODE
258 && par.ownerCode() != LISTINGS_CODE)
266 // be careful: this is called from the bv's constructor, too, so
267 // bv functions are not yet available!
268 Cursor::Cursor(BufferView & bv)
269 : DocIterator(), bv_(&bv), anchor_(), x_target_(-1), textTargetOffset_(0),
270 selection_(false), mark_(false), logicalpos_(false),
271 current_font(inherit_font)
275 void Cursor::reset(Inset & inset)
278 push_back(CursorSlice(inset));
279 anchor_ = DocIterator(inset);
286 // this (intentionally) does neither touch anchor nor selection status
287 void Cursor::setCursor(DocIterator const & cur)
289 DocIterator::operator=(cur);
293 void Cursor::dispatch(FuncRequest const & cmd0)
295 LYXERR(Debug::DEBUG, "cmd: " << cmd0 << '\n' << *this);
300 FuncRequest cmd = cmd0;
303 // store some values to be used inside of the handlers
304 getPos(beforeDispX_, beforeDispY_);
305 beforeDispatchCursor_ = *this;
306 for (; depth(); pop()) {
307 LYXERR(Debug::DEBUG, "Cursor::dispatch: cmd: "
308 << cmd0 << endl << *this);
309 BOOST_ASSERT(pos() <= lastpos());
310 BOOST_ASSERT(idx() <= lastidx());
311 BOOST_ASSERT(pit() <= lastpit());
313 // The common case is 'LFUN handled, need update', so make the
314 // LFUN handler's life easier by assuming this as default value.
315 // The handler can reset the update and val flags if necessary.
316 disp_.update(Update::FitCursor | Update::Force);
317 disp_.dispatched(true);
318 inset().dispatch(*this, cmd);
319 if (disp_.dispatched())
323 // it completely to get a 'bomb early' behaviour in case this
324 // object will be used again.
325 if (!disp_.dispatched()) {
326 LYXERR(Debug::DEBUG, "RESTORING OLD CURSOR!");
328 disp_.update(Update::None);
329 disp_.dispatched(false);
331 // restore the previous one because nested Cursor::dispatch calls
332 // are possible which would change it
333 beforeDispatchCursor_ = safe.beforeDispatchCursor_;
338 DispatchResult Cursor::result() const
344 BufferView & Cursor::bv() const
351 Buffer & Cursor::buffer() const
354 return bv_->buffer();
360 BOOST_ASSERT(depth() >= 1);
365 void Cursor::push(Inset & p)
367 push_back(CursorSlice(p));
371 void Cursor::pushBackward(Inset & p)
373 BOOST_ASSERT(!empty());
374 //lyxerr << "Entering inset " << t << " front" << endl;
380 bool Cursor::popBackward()
382 BOOST_ASSERT(!empty());
383 //lyxerr << "Leaving inset from in front" << endl;
384 inset().notifyCursorLeaves(*this);
392 bool Cursor::popForward()
394 BOOST_ASSERT(!empty());
395 //lyxerr << "Leaving inset from in back" << endl;
396 const pos_type lp = (depth() > 1) ? (*this)[depth() - 2].lastpos() : 0;
397 inset().notifyCursorLeaves(*this);
401 pos() += lastpos() - lp + 1;
406 int Cursor::currentMode()
408 BOOST_ASSERT(!empty());
409 for (int i = depth() - 1; i >= 0; --i) {
410 int res = operator[](i).inset().currentMode();
411 if (res != Inset::UNDECIDED_MODE)
414 return Inset::TEXT_MODE;
418 void Cursor::getPos(int & x, int & y) const
420 Point p = bv().getPos(*this, boundary());
426 Row const & Cursor::textRow() const
428 ParagraphMetrics const & pm = bv().parMetrics(text(), pit());
429 BOOST_ASSERT(!pm.rows().empty());
430 return pm.getRow(pos(), boundary());
434 void Cursor::resetAnchor()
441 bool Cursor::posBackward()
450 bool Cursor::posForward()
452 if (pos() == lastpos())
459 CursorSlice Cursor::anchor() const
461 BOOST_ASSERT(anchor_.depth() >= depth());
462 CursorSlice normal = anchor_[depth() - 1];
463 if (depth() < anchor_.depth() && top() <= normal) {
464 // anchor is behind cursor -> move anchor behind the inset
471 CursorSlice Cursor::selBegin() const
475 return anchor() < top() ? anchor() : top();
479 CursorSlice Cursor::selEnd() const
483 return anchor() > top() ? anchor() : top();
487 DocIterator Cursor::selectionBegin() const
491 DocIterator di = (anchor() < top() ? anchor_ : *this);
497 DocIterator Cursor::selectionEnd() const
501 DocIterator di = (anchor() > top() ? anchor_ : *this);
502 if (di.depth() > depth()) {
510 void Cursor::setSelection()
513 // A selection with no contents is not a selection
514 // FIXME: doesnt look ok
515 if (pit() == anchor().pit() && pos() == anchor().pos())
520 void Cursor::setSelection(DocIterator const & where, int n)
529 void Cursor::clearSelection()
537 void Cursor::setTargetX(int x)
540 textTargetOffset_ = 0;
544 int Cursor::x_target() const
550 void Cursor::clearTargetX()
553 textTargetOffset_ = 0;
557 void Cursor::updateTextTargetOffset()
562 textTargetOffset_ = x - x_target_;
566 void Cursor::info(odocstream & os) const
568 for (int i = 1, n = depth(); i < n; ++i) {
569 operator[](i).inset().infoize(os);
573 Inset const * inset = prevInset();
574 // prevInset() can return 0 in certain case.
576 prevInset()->infoize2(os);
578 // overwite old message
583 bool Cursor::selHandle(bool sel)
585 //lyxerr << "Cursor::selHandle" << endl;
586 if (sel == selection())
590 cap::saveSelection(*this);
598 std::ostream & operator<<(std::ostream & os, Cursor const & cur)
600 os << "\n cursor: | anchor:\n";
601 for (size_t i = 0, n = cur.depth(); i != n; ++i) {
602 os << " " << cur[i] << " | ";
603 if (i < cur.anchor_.depth())
604 os << cur.anchor_[i];
606 os << "-------------------------------";
609 for (size_t i = cur.depth(), n = cur.anchor_.depth(); i < n; ++i) {
610 os << "------------------------------- | " << cur.anchor_[i] << "\n";
612 os << " selection: " << cur.selection_
613 << " x_target: " << cur.x_target_ << endl;
618 LyXErr & operator<<(LyXErr & os, Cursor const & cur)
628 ///////////////////////////////////////////////////////////////////
631 // The part below is the non-integrated rest of the original math
632 // cursor. This should be either generalized for texted or moved
633 // back to mathed (in most cases to InsetMathNest).
635 ///////////////////////////////////////////////////////////////////
637 #include "mathed/InsetMathChar.h"
638 #include "mathed/InsetMathGrid.h"
639 #include "mathed/InsetMathScript.h"
640 #include "mathed/InsetMathUnknown.h"
641 #include "mathed/MathFactory.h"
642 #include "mathed/MathStream.h"
643 #include "mathed/MathSupport.h"
648 //#define FILEDEBUG 1
651 bool Cursor::isInside(Inset const * p)
653 for (size_t i = 0; i != depth(); ++i)
654 if (&operator[](i).inset() == p)
660 void Cursor::leaveInset(Inset const & inset)
662 for (size_t i = 0; i != depth(); ++i) {
663 if (&operator[](i).inset() == &inset) {
671 bool Cursor::openable(MathAtom const & t) const
682 // we can't move into anything new during selection
683 if (depth() >= anchor_.depth())
685 if (t.nucleus() != &anchor_[depth()].inset())
692 void Cursor::setScreenPos(int x, int /*y*/)
695 //bruteFind(*this, x, y, 0, bv().workWidth(), 0, bv().workHeight());
700 void Cursor::plainErase()
706 void Cursor::markInsert()
708 insert(char_type(0));
712 void Cursor::markErase()
718 void Cursor::plainInsert(MathAtom const & t)
720 cell().insert(pos(), t);
725 void Cursor::insert(docstring const & str)
727 for_each(str.begin(), str.end(),
728 boost::bind(static_cast<void(Cursor::*)(char_type)>
729 (&Cursor::insert), this, _1));
733 void Cursor::insert(char_type c)
735 //lyxerr << "Cursor::insert char '" << c << "'" << endl;
736 BOOST_ASSERT(!empty());
738 cap::selClearOrDel(*this);
739 insert(new InsetMathChar(c));
741 text()->insertChar(*this, c);
746 void Cursor::insert(MathAtom const & t)
748 //lyxerr << "Cursor::insert MathAtom '" << t << "'" << endl;
750 cap::selClearOrDel(*this);
755 void Cursor::insert(Inset * inset)
758 insert(MathAtom(inset));
760 text()->insertInset(*this, inset);
764 void Cursor::niceInsert(docstring const & t)
775 void Cursor::niceInsert(MathAtom const & t)
778 docstring const safe = cap::grabAndEraseSelection(*this);
780 // enter the new inset and move the contents of the selection if possible
783 // be careful here: don't use 'pushBackward(t)' as this we need to
784 // push the clone, not the original
785 pushBackward(*nextInset());
786 // We may not use niceInsert here (recursion)
794 void Cursor::insert(MathData const & ar)
798 cap::eraseSelection(*this);
799 cell().insert(pos(), ar);
804 bool Cursor::backspace()
806 autocorrect() = false;
809 cap::eraseSelection(*this);
814 // If empty cell, and not part of a big cell
815 if (lastpos() == 0 && inset().nargs() == 1) {
817 // Directly delete empty cell: [|[]] => [|]
823 // [|], can not delete from inside
835 InsetMathUnknown * p = activeMacro();
836 if (p->name().size() > 1) {
837 p->setName(p->name().substr(0, p->name().size() - 1));
842 if (pos() != 0 && prevAtom()->nargs() > 0) {
843 // let's require two backspaces for 'big stuff' and
844 // highlight on the first
858 autocorrect() = false;
863 cap::eraseSelection(*this);
867 // delete empty cells if possible
868 if (pos() == lastpos() && inset().idxDelete(idx()))
871 // special behaviour when in last position of cell
872 if (pos() == lastpos()) {
873 bool one_cell = inset().nargs() == 1;
874 if (one_cell && lastpos() == 0) {
876 // Directly delete empty cell: [|[]] => [|]
882 // [|], can not delete from inside
887 inset().idxGlue(idx());
891 // 'clever' UI hack: only erase large items if previously slected
892 if (pos() != lastpos() && nextAtom()->nargs() > 0) {
907 DocIterator save = *this;
908 FuncRequest cmd(selection() ? LFUN_UP_SELECT : LFUN_UP, docstring());
910 if (disp_.dispatched())
913 autocorrect() = false;
921 DocIterator save = *this;
922 FuncRequest cmd(selection() ? LFUN_DOWN_SELECT : LFUN_DOWN, docstring());
924 if (disp_.dispatched())
927 autocorrect() = false;
932 bool Cursor::macroModeClose()
936 InsetMathUnknown * p = activeMacro();
938 docstring const s = p->name();
942 // do nothing if the macro name is empty
946 // trigger updates of macros, at least, if no full
947 // updates take place anyway
948 updateFlags(Update::Force);
950 docstring const name = s.substr(1);
951 InsetMathNest * const in = inset().asInsetMath()->asNestInset();
952 if (in && in->interpretString(*this, s))
954 MathAtom atom = createInsetMath(name);
955 MathMacro * atomAsMacro = atom.nucleus()->asMacro();
957 // make non-greedy, i.e. don't eat parameters from the right
958 atomAsMacro->setDisplayMode(MathMacro::DISPLAY_INTERACTIVE_INIT);
965 docstring Cursor::macroName()
967 return inMacroMode() ? activeMacro()->name() : docstring();
971 void Cursor::handleNest(MathAtom const & a, int c)
973 //lyxerr << "Cursor::handleNest: " << c << endl;
975 asArray(cap::grabAndEraseSelection(*this), t.nucleus()->cell(c));
978 pushBackward(*nextInset());
982 int Cursor::targetX() const
984 if (x_target() != -1)
993 int Cursor::textTargetOffset() const
995 return textTargetOffset_;
999 void Cursor::setTargetX()
1008 bool Cursor::inMacroMode() const
1014 InsetMathUnknown const * p = prevAtom()->asUnknownInset();
1015 return p && !p->final();
1019 InsetMathUnknown * Cursor::activeMacro()
1021 return inMacroMode() ? prevAtom().nucleus()->asUnknownInset() : 0;
1025 void Cursor::pullArg()
1028 MathData ar = cell();
1029 if (popBackward() && inMathed()) {
1031 cell().insert(pos(), ar);
1034 //formula()->mutateToText();
1039 void Cursor::touch()
1043 DocIterator::const_iterator it = begin();
1044 DocIterator::const_iterator et = end();
1045 for ( ; it != et; ++it)
1051 void Cursor::normalize()
1053 if (idx() > lastidx()) {
1054 lyxerr << "this should not really happen - 1: "
1055 << idx() << ' ' << nargs()
1056 << " in: " << &inset() << endl;
1060 if (pos() > lastpos()) {
1061 lyxerr << "this should not really happen - 2: "
1062 << pos() << ' ' << lastpos() << " in idx: " << idx()
1064 odocstringstream os;
1065 WriteStream wi(os, false, true);
1066 inset().asInsetMath()->write(wi);
1067 lyxerr << to_utf8(os.str()) << endl;
1073 bool Cursor::upDownInMath(bool up)
1075 // Be warned: The 'logic' implemented in this function is highly
1076 // fragile. A distance of one pixel or a '<' vs '<=' _really
1077 // matters. So fiddle around with it only if you think you know
1078 // what you are doing!
1084 // check if we had something else in mind, if not, this is the future
1086 if (x_target_ == -1)
1088 else if (inset().asInsetText() && xo - textTargetOffset() != x_target()) {
1089 // In text mode inside the line (not left or right) possibly set a new target_x,
1090 // but only if we are somewhere else than the previous target-offset.
1092 // We want to keep the x-target on subsequent up/down movements
1093 // that cross beyond the end of short lines. Thus a special
1094 // handling when the cursor is at the end of line: Use the new
1095 // x-target only if the old one was before the end of line
1096 // or the old one was after the beginning of the line
1097 bool inRTL = isWithinRtlParagraph(*this);
1101 left = pos() == textRow().endpos();
1102 right = pos() == textRow().pos();
1104 left = pos() == textRow().pos();
1105 right = pos() == textRow().endpos();
1107 if ((!left && !right) ||
1108 (left && !right && xo < x_target_) ||
1109 (!left && right && x_target_ < xo))
1116 // try neigbouring script insets
1118 if (inMathed() && !selection()) {
1121 InsetMathScript const * p = prevAtom()->asScriptInset();
1122 if (p && p->has(up)) {
1124 push(*const_cast<InsetMathScript*>(p));
1125 idx() = p->idxOfScript(up);
1128 // we went in the right direction? Otherwise don't jump into the script
1132 if ((!up && y <= beforeDispY_) ||
1133 (up && y >= beforeDispY_))
1141 if (pos() != lastpos()) {
1142 InsetMathScript const * p = nextAtom()->asScriptInset();
1143 if (p && p->has(up)) {
1144 push(*const_cast<InsetMathScript*>(p));
1145 idx() = p->idxOfScript(up);
1148 // we went in the right direction? Otherwise don't jump into the script
1152 if ((!up && y <= beforeDispY_) ||
1153 (up && y >= beforeDispY_))
1161 // try to find an inset that knows better then we,
1162 if (inset().idxUpDown(*this, up)) {
1163 //lyxerr << "idxUpDown triggered" << endl;
1164 // try to find best position within this inset
1166 setCursor(bruteFind2(*this, xo, yo));
1170 // any improvement going just out of inset?
1171 if (popBackward() && inMathed()) {
1172 //lyxerr << "updown: popBackward succeeded" << endl;
1176 if (up ? ynew < beforeDispY_ : ynew > beforeDispY_)
1180 // no success, we are probably at the document top or bottom
1186 bool Cursor::upDownInText(bool up, bool & updateNeeded)
1188 BOOST_ASSERT(text());
1196 // update the targetX - this is here before the "return false"
1197 // to set a new target which can be used by InsetTexts above
1198 // if we cannot move up/down inside this inset anymore
1199 if (x_target_ == -1)
1201 else if (xo - textTargetOffset() != x_target() &&
1202 depth() == beforeDispatchCursor_.depth()) {
1203 // In text mode inside the line (not left or right) possibly set a new target_x,
1204 // but only if we are somewhere else than the previous target-offset.
1206 // We want to keep the x-target on subsequent up/down movements
1207 // that cross beyond the end of short lines. Thus a special
1208 // handling when the cursor is at the end of line: Use the new
1209 // x-target only if the old one was before the end of line
1210 // or the old one was after the beginning of the line
1211 bool inRTL = isWithinRtlParagraph(*this);
1215 left = pos() == textRow().endpos();
1216 right = pos() == textRow().pos();
1218 left = pos() == textRow().pos();
1219 right = pos() == textRow().endpos();
1221 if ((!left && !right) ||
1222 (left && !right && xo < x_target_) ||
1223 (!left && right && x_target_ < xo))
1230 // first get the current line
1231 TextMetrics & tm = bv_->textMetrics(text());
1232 ParagraphMetrics const & pm = tm.parMetrics(pit());
1234 if (pos() && boundary())
1235 row = pm.pos2row(pos() - 1);
1237 row = pm.pos2row(pos());
1239 // are we not at the start or end?
1241 if (pit() == 0 && row == 0)
1244 if (pit() + 1 >= int(text()->paragraphs().size()) &&
1245 row + 1 >= int(pm.rows().size()))
1249 // with and without selection are handled differently
1251 int yo = bv().getPos(*this, boundary()).y_;
1253 // To next/previous row
1255 tm.editXY(*this, xo, yo - textRow().ascent() - 1);
1257 tm.editXY(*this, xo, yo + textRow().descent() + 1);
1260 // This happens when you move out of an inset.
1261 // And to give the DEPM the possibility of doing
1262 // something we must provide it with two different
1264 Cursor dummy = *this;
1267 if (bv().checkDepm(dummy, old)) {
1268 updateNeeded = true;
1269 // Make sure that cur gets back whatever happened to dummy(Lgb)
1273 // if there is a selection, we stay out of any inset, and just jump to the right position:
1277 top().pos() = std::min(tm.x2pos(pit(), row - 1, xo), top().lastpos());
1278 } else if (pit() > 0) {
1280 ParagraphMetrics const & pmcur = bv_->parMetrics(text(), pit());
1281 top().pos() = std::min(tm.x2pos(pit(), pmcur.rows().size() - 1, xo), top().lastpos());
1284 if (row + 1 < int(pm.rows().size())) {
1285 top().pos() = std::min(tm.x2pos(pit(), row + 1, xo), top().lastpos());
1286 } else if (pit() + 1 < int(text()->paragraphs().size())) {
1288 top().pos() = std::min(tm.x2pos(pit(), 0, xo), top().lastpos());
1292 updateNeeded |= bv().checkDepm(*this, old);
1295 updateTextTargetOffset();
1300 void Cursor::handleFont(string const & font)
1302 LYXERR(Debug::DEBUG, font);
1306 safe = cap::grabAndEraseSelection(*this);
1309 if (lastpos() != 0) {
1310 // something left in the cell
1312 // cursor in first position
1314 } else if (pos() == lastpos()) {
1315 // cursor in last position
1318 // cursor in between. split cell
1319 MathData::iterator bt = cell().begin();
1320 MathAtom at = createInsetMath(from_utf8(font));
1321 at.nucleus()->cell(0) = MathData(bt, bt + pos());
1322 cell().erase(bt, bt + pos());
1327 // nothing left in the cell
1335 void Cursor::message(docstring const & msg) const
1337 theLyXFunc().setMessage(msg);
1341 void Cursor::errorMessage(docstring const & msg) const
1343 theLyXFunc().setErrorMessage(msg);
1347 docstring Cursor::selectionAsString(bool label) const
1353 Buffer const & buffer = bv().buffer();
1354 ParagraphList const & pars = text()->paragraphs();
1356 // should be const ...
1357 pit_type startpit = selBegin().pit();
1358 pit_type endpit = selEnd().pit();
1359 size_t const startpos = selBegin().pos();
1360 size_t const endpos = selEnd().pos();
1362 if (startpit == endpit)
1363 return pars[startpit].asString(buffer, startpos, endpos, label);
1365 // First paragraph in selection
1366 docstring result = pars[startpit].
1367 asString(buffer, startpos, pars[startpit].size(), label)
1368 + parbreak(pars[startpit]);
1370 // The paragraphs in between (if any)
1371 for (pit_type pit = startpit + 1; pit != endpit; ++pit) {
1372 Paragraph const & par = pars[pit];
1373 result += par.asString(buffer, 0, par.size(), label)
1374 + parbreak(pars[pit]);
1377 // Last paragraph in selection
1378 result += pars[endpit].asString(buffer, 0, endpos, label);
1384 return cap::grabSelection(*this);
1390 docstring Cursor::currentState()
1393 odocstringstream os;
1399 return text()->currentState(*this);
1405 docstring Cursor::getPossibleLabel()
1407 return inMathed() ? from_ascii("eq:") : text()->getPossibleLabel(*this);
1411 Encoding const * Cursor::getEncoding() const
1416 // go up until first non-0 text is hit
1417 // (innermost text is 0 in mathed)
1418 for (s = depth() - 1; s >= 0; --s)
1419 if (operator[](s).text())
1421 CursorSlice const & sl = operator[](s);
1422 Text const & text = *sl.text();
1423 Font font = text.getPar(sl.pit()).getFont(
1424 bv().buffer().params(), sl.pos(), outerFont(sl.pit(), text.paragraphs()));
1425 return font.language()->encoding();
1429 void Cursor::undispatched()
1431 disp_.dispatched(false);
1435 void Cursor::dispatched()
1437 disp_.dispatched(true);
1441 void Cursor::updateFlags(Update::flags f)
1447 void Cursor::noUpdate()
1449 disp_.update(Update::None);
1453 Font Cursor::getFont() const
1455 // The logic here should more or less match to the Cursor::setCurrentFont
1456 // logic, i.e. the cursor height should give a hint what will happen
1457 // if a character is entered.
1459 // HACK. far from being perfect...
1460 // go up until first non-0 text is hit
1461 // (innermost text is 0 in mathed)
1463 for (s = depth() - 1; s >= 0; --s)
1464 if (operator[](s).text())
1466 CursorSlice const & sl = operator[](s);
1467 Text const & text = *sl.text();
1468 Paragraph const & par = text.getPar(sl.pit());
1470 // on boundary, so we are really at the character before
1471 pos_type pos = sl.pos();
1472 if (pos > 0 && boundary())
1475 // on space? Take the font before (only for RTL boundary stay)
1477 TextMetrics const & tm = bv().textMetrics(&text);
1478 if (pos == sl.lastpos()
1479 || (par.isSeparator(pos)
1480 && !tm.isRTLBoundary(sl.pit(), pos)))
1484 // get font at the position
1485 Font font = par.getFont(bv().buffer().params(), pos,
1486 outerFont(sl.pit(), text.paragraphs()));
1492 bool Cursor::fixIfBroken()
1494 if (DocIterator::fixIfBroken()) {
1503 bool notifyCursorLeaves(DocIterator const & old, Cursor & cur)
1505 // find inset in common
1507 for (i = 0; i < old.depth() && i < cur.depth(); ++i) {
1508 if (&old.inset() != &cur.inset())
1512 // notify everything on top of the common part in old cursor,
1513 // but stop if the inset claims the cursor to be invalid now
1514 for (; i < old.depth(); ++i) {
1515 if (old[i].inset().notifyCursorLeaves(cur))
1523 void Cursor::setCurrentFont()
1525 CursorSlice const & cs = innerTextSlice();
1526 Paragraph const & par = cs.paragraph();
1527 pos_type cpit = cs.pit();
1528 pos_type cpos = cs.pos();
1529 Text const & ctext = *cs.text();
1530 TextMetrics const & tm = bv().textMetrics(&ctext);
1532 // are we behind previous char in fact? -> go to that char
1533 if (cpos > 0 && boundary())
1536 // find position to take the font from
1538 // paragraph end? -> font of last char
1539 if (cpos == lastpos())
1541 // on space? -> look at the words in front of space
1542 else if (cpos > 0 && par.isSeparator(cpos)) {
1543 // abc| def -> font of c
1544 // abc |[WERBEH], i.e. boundary==true -> font of c
1545 // abc [WERBEH]| def, font of the space
1546 if (!tm.isRTLBoundary(cpit, cpos))
1552 BufferParams const & bufparams = buffer().params();
1553 current_font = par.getFontSettings(bufparams, cpos);
1554 real_current_font = tm.getDisplayFont(cpit, cpos);
1556 // special case for paragraph end
1557 if (cs.pos() == lastpos()
1558 && tm.isRTLBoundary(cpit, cs.pos())
1560 Language const * lang = par.getParLanguage(bufparams);
1561 current_font.setLanguage(lang);
1562 current_font.fontInfo().setNumber(FONT_OFF);
1563 real_current_font.setLanguage(lang);
1564 real_current_font.fontInfo().setNumber(FONT_OFF);
1569 bool Cursor::textUndo()
1571 DocIterator dit = *this;
1572 // Undo::textUndo() will modify dit.
1573 if (!bv_->buffer().undo().textUndo(dit))
1577 selection() = false;
1584 bool Cursor::textRedo()
1586 DocIterator dit = *this;
1587 // Undo::textRedo() will modify dit.
1588 if (!bv_->buffer().undo().textRedo(dit))
1592 selection() = false;
1599 void Cursor::finishUndo()
1601 bv_->buffer().undo().finishUndo();
1605 void Cursor::recordUndo(UndoKind kind, pit_type from, pit_type to)
1607 bv_->buffer().undo().recordUndo(*this, kind, from, to);
1611 void Cursor::recordUndo(UndoKind kind, pit_type from)
1613 bv_->buffer().undo().recordUndo(*this, kind, from);
1617 void Cursor::recordUndo(UndoKind kind)
1619 bv_->buffer().undo().recordUndo(*this, kind);
1623 void Cursor::recordUndoInset(UndoKind kind)
1625 bv_->buffer().undo().recordUndoInset(*this, kind);
1629 void Cursor::recordUndoFullDocument()
1631 bv_->buffer().undo().recordUndoFullDocument(*this);
1635 void Cursor::recordUndoSelection()
1637 bv_->buffer().undo().recordUndo(*this, ATOMIC_UNDO,
1638 selBegin().pit(), selEnd().pit());