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Fix crash when selecting text with changes

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When selecting text, in some cases a DocIterator could be forwarded
to a (non-existant) paragraph after the end. The critical part of
this fix is to break the loop at the correct place. The following
are additional improvements:

- increase readability by defining a bool named "in_last_par"
- use cur.selectionEnd().pit() instead of cur.selectionEnd().paragraph().id()
- use it.lastpos() instead of it.paragraph().size()

This commit fixes a regression introduced by 23de5e5e, and reported
at #11204.

Thanks to Jürgen and JMarc.

(cherry picked from commit d12798759a)
This commit is contained in:
Scott Kostyshak 2018-07-27 15:28:22 -04:00
parent 890fb133b1
commit 0af6a43b6a
1 changed files with 6 additions and 3 deletions
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9
src/Text3.cpp
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@ -3207,17 +3207,20 @@ bool Text::getStatus(Cursor & cur, FuncRequest const & cmd,
if (!cur.buffer()->areChangesPresent())
break;
for (DocIterator it = cur.selectionBegin(); it < cur.selectionEnd(); it.forwardPar()) {
for (DocIterator it = cur.selectionBegin(); ; it.forwardPar()) {
pos_type const beg = it.pos();
pos_type end;
if (it.paragraph().id() == cur.selectionEnd().paragraph().id())
bool const in_last_par = (it.pit() == cur.selectionEnd().pit());
if (in_last_par)
end = cur.selectionEnd().pos();
else
end = it.paragraph().size();
end = it.lastpos();
if (beg != end && it.paragraph().isChanged(beg, end)) {
enable = true;
break;
}
if (in_last_par)
break;
}
}
break;