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DEPM: fix infinite loop.

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This commit is contained in:
Jean-Marc Lasgouttes 2019-02-05 11:51:24 +01:00
parent fc0ab1283c
commit 5e4fd6c796
1 changed files with 15 additions and 9 deletions
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24
src/Text2.cpp
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@ -781,11 +781,14 @@ bool Text::cursorDownParagraph(Cursor & cur)
namespace { namespace {
void deleteSpaces(Paragraph & par, pos_type const from, pos_type to, /** delete num_spaces characters between from and to. Return the
* number of spaces that got physically deleted (not marked as
* deleted */
int deleteSpaces(Paragraph & par, pos_type const from, pos_type to,
int num_spaces, bool const trackChanges) int num_spaces, bool const trackChanges)
{ {
if (!num_spaces) if (num_spaces <= 0)
return; return 0;
// First, delete spaces marked as inserted // First, delete spaces marked as inserted
int pos = from; int pos = from;
@ -800,7 +803,9 @@ void deleteSpaces(Paragraph & par, pos_type const from, pos_type to,
} }
// Then remove remaining spaces // Then remove remaining spaces
int const psize = par.size();
par.eraseChars(from, from + num_spaces, trackChanges); par.eraseChars(from, from + num_spaces, trackChanges);
return psize - par.size();
} }
} }
@ -812,6 +817,7 @@ bool Text::deleteEmptyParagraphMechanism(Cursor & cur,
//LYXERR(Debug::DEBUG, "DEPM: cur:\n" << cur << "old:\n" << old); //LYXERR(Debug::DEBUG, "DEPM: cur:\n" << cur << "old:\n" << old);
Paragraph & oldpar = old.paragraph(); Paragraph & oldpar = old.paragraph();
bool const trackChanges = cur.buffer()->params().track_changes;
// We allow all kinds of "mumbo-jumbo" when freespacing. // We allow all kinds of "mumbo-jumbo" when freespacing.
if (oldpar.isFreeSpacing()) if (oldpar.isFreeSpacing())
@ -873,14 +879,13 @@ bool Text::deleteEmptyParagraphMechanism(Cursor & cur,
// Remove spaces and adapt cursor. // Remove spaces and adapt cursor.
if (num_spaces > 0) { if (num_spaces > 0) {
pos_type const oldlast = old.lastpos(); int const deleted =
deleteSpaces(oldpar, from, to, num_spaces, deleteSpaces(oldpar, from, to, num_spaces, trackChanges);
cur.buffer()->params().track_changes);
// correct cur position // correct cur position
// FIXME: there can be other cursors pointing there, we should update them // FIXME: there can be other cursors pointing there, we should update them
if (same_par) { if (same_par) {
if (cur[depth].pos() >= to) if (cur[depth].pos() >= to)
cur[depth].pos() -= oldlast - old.lastpos(); cur[depth].pos() -= deleted;
else if (cur[depth].pos() > from) else if (cur[depth].pos() > from)
cur[depth].pos() = min(from + 1, old.lastpos()); cur[depth].pos() = min(from + 1, old.lastpos());
need_anchor_change = true; need_anchor_change = true;
@ -929,7 +934,7 @@ bool Text::deleteEmptyParagraphMechanism(Cursor & cur,
return true; return true;
} }
if (oldpar.stripLeadingSpaces(cur.buffer()->params().track_changes)) { if (oldpar.stripLeadingSpaces(trackChanges)) {
need_anchor_change = true; need_anchor_change = true;
// We return true here because the Paragraph contents changed and // We return true here because the Paragraph contents changed and
// we need a redraw before further action is processed. // we need a redraw before further action is processed.
@ -973,7 +978,8 @@ void Text::deleteEmptyParagraphMechanism(pit_type first, pit_type last, bool tra
--num_spaces; --num_spaces;
// Remove spaces if needed // Remove spaces if needed
deleteSpaces(par, from , to, num_spaces, trackChanges); int const deleted = deleteSpaces(par, from , to, num_spaces, trackChanges);
from = to - deleted;
} }
// don't delete anything if this is the only remaining paragraph // don't delete anything if this is the only remaining paragraph