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fix 'split' operation when the pattern occurs at the beginning

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Previously it would result in a stray single-character selection at the
beginning of the input text.

For example:
[abcabc] -> split on 'a' -> [a][bc]a[bc]
or
[foobarfoobar] -> split on 'foo' -> [f]oo[bar]foo[bar]

Note that this behavior was not occuring if the input text was at the
beginning of the buffer
This commit is contained in:
Olivier Perret 2023-01-20 17:52:44 +01:00
parent d8883d47c0
commit b039a313a4
1 changed files with 3 additions and 2 deletions
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5
src/selectors.cc
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@ -965,7 +965,8 @@ Vector<Selection> split_on_matches(const Buffer& buffer, ConstArrayView<Selectio
ThreadedRegexVM<BufferIterator, RegexMode::Forward | RegexMode::Search> vm{*regex.impl()};
for (auto& sel : selections)
{
auto begin = buffer.iterator_at(sel.min());
auto sel_begin = buffer.iterator_at(sel.min());
auto begin = sel_begin;
auto sel_end = utf8::next(buffer.iterator_at(sel.max()), buf_end);
for (auto&& match : RegexIterator{begin, sel_end, vm, match_flags(buffer, begin, sel_end)})
@ -975,7 +976,7 @@ Vector<Selection> split_on_matches(const Buffer& buffer, ConstArrayView<Selectio
if (end == buf_end)
continue;
if (end != buf_begin)
if (end != sel_begin)
{
auto sel_end = (begin == end) ? end : utf8::previous(end, begin);
result.push_back(keep_direction({ begin.coord(), sel_end.coord() }, sel));