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Cleanup RegexHighlighter code and drop cache when it becomes too big

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The RegexHighlighter range cache can get pretty big in nested
regions use cases, and maintaining it can become pretty costly,
so if it hits a certain size, just drop it.

Should improve performances in #2454
This commit is contained in:
Maxime Coste 2018-10-10 21:56:03 +11:00
parent 194a5db5d6
commit 71e27c73af
1 changed files with 13 additions and 15 deletions
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28
src/highlighters.cc
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@ -280,7 +280,7 @@ public:
return spec.second.empty() ? Face{} : faces[spec.second];
}) | gather<Vector<Face>>();
auto& matches = get_matches(context.context.buffer(), display_buffer.range(), range);
const auto& matches = get_matches(context.context.buffer(), display_buffer.range(), range);
kak_assert(matches.size() % m_faces.size() == 0);
for (size_t m = 0; m < matches.size(); ++m)
{
@ -352,8 +352,7 @@ private:
m_faces.emplace(m_faces.begin(), 0, String{});
}
void add_matches(const Buffer& buffer, MatchList& matches,
BufferRange range)
void add_matches(const Buffer& buffer, MatchList& matches, BufferRange range)
{
kak_assert(matches.size() % m_faces.size() == 0);
using RegexIt = RegexIterator<BufferIterator>;
@ -375,26 +374,27 @@ private:
}
}
MatchList& get_matches(const Buffer& buffer, BufferRange display_range,
BufferRange buffer_range)
const MatchList& get_matches(const Buffer& buffer, BufferRange display_range, BufferRange buffer_range)
{
Cache& cache = m_cache.get(buffer);
auto& matches = cache.m_matches;
if (cache.m_regex_version != m_regex_version or
cache.m_timestamp != buffer.timestamp())
cache.m_timestamp != buffer.timestamp() or
matches.size() > 1000)
{
matches.clear();
cache.m_timestamp = buffer.timestamp();
cache.m_regex_version = m_regex_version;
}
const LineCount line_offset = 3;
BufferRange range{std::max<BufferCoord>(buffer_range.begin, display_range.begin.line - line_offset),
std::min<BufferCoord>(buffer_range.end, display_range.end.line + line_offset)};
auto it = std::upper_bound(matches.begin(), matches.end(), range,
[](const BufferRange& lhs, const Cache::RangeAndMatches& rhs)
{ return lhs.begin < rhs.range.end; });
auto it = std::upper_bound(matches.begin(), matches.end(), range.begin,
[](const BufferCoord& lhs, const Cache::RangeAndMatches& rhs)
{ return lhs < rhs.range.end; });
if (it == matches.end() or it->range.begin > range.end)
{
@ -423,14 +423,12 @@ private:
// add regex matches from new begin to old first match end
if (range.begin < old_range.begin)
{
old_range.begin = range.begin;
MatchList new_matches;
add_matches(buffer, new_matches, {range.begin, first_end});
matches.erase(matches.begin(), matches.begin() + m_faces.size());
size_t pivot = matches.size();
old_range.begin = range.begin;
add_matches(buffer, matches, {range.begin, first_end});
std::copy(std::make_move_iterator(new_matches.begin()),
std::make_move_iterator(new_matches.end()),
std::inserter(matches, matches.begin()));
std::rotate(matches.begin(), matches.begin() + pivot, matches.end());
}
// add regex matches from old last match begin to new end
if (old_range.end < range.end)