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RegexColorizer maintains a per buffer cache

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This commit is contained in:
Maxime Coste 2013-11-18 23:17:06 +00:00
parent 255a747fdd
commit a9d832965f
1 changed files with 29 additions and 18 deletions
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47
src/highlighters.cc
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@ -67,15 +67,15 @@ class RegexColorizer
{
public:
RegexColorizer(Regex regex, ColorSpec colors)
: m_regex(std::move(regex)), m_colors(std::move(colors)),
m_cache_timestamp(0)
: m_regex(std::move(regex)), m_colors(std::move(colors))
{
}
void operator()(const Window& window, DisplayBuffer& display_buffer)
{
update_cache_ifn(window.buffer(), display_buffer.range());
for (auto& match : m_cache_matches)
const Buffer& buffer = window.buffer();
update_cache_ifn(buffer, display_buffer.range());
for (auto& match : m_caches[&buffer].m_matches)
{
for (size_t n = 0; n < match.size(); ++n)
{
@ -83,37 +83,48 @@ public:
if (col_it == m_colors.end())
continue;
highlight_range(display_buffer, match[n].first.coord(), match[n].second.coord(), true,
highlight_range(display_buffer, match[n].first, match[n].second, true,
[&](DisplayAtom& atom) { atom.colors = *col_it->second; });
}
}
}
private:
BufferRange m_cache_range;
size_t m_cache_timestamp;
std::vector<boost::match_results<BufferIterator>> m_cache_matches;
struct MatchesCache
{
BufferRange m_range;
size_t m_timestamp;
std::vector<std::vector<std::pair<BufferCoord, BufferCoord>>> m_matches;
};
std::unordered_map<const Buffer*, MatchesCache> m_caches;
Regex m_regex;
ColorSpec m_colors;
void update_cache_ifn(const Buffer& buffer, const BufferRange& range)
{
if (buffer.timestamp() == m_cache_timestamp and
range.first >= m_cache_range.first and
range.second <= m_cache_range.second)
MatchesCache& cache = m_caches[&buffer];
if (buffer.timestamp() == cache.m_timestamp and
range.first >= cache.m_range.first and
range.second <= cache.m_range.second)
return;
m_cache_matches.clear();
m_cache_range.first = buffer.clamp({range.first.line - 10, 0});
m_cache_range.second = buffer.next(buffer.clamp({range.second.line + 10, INT_MAX}));
m_cache_timestamp = buffer.timestamp();
cache.m_range.first = buffer.clamp({range.first.line - 10, 0});
cache.m_range.second = buffer.next(buffer.clamp({range.second.line + 10, INT_MAX}));
cache.m_timestamp = buffer.timestamp();
RegexIterator re_it{buffer.iterator_at(m_cache_range.first),
buffer.iterator_at(m_cache_range.second), m_regex};
cache.m_matches.clear();
RegexIterator re_it{buffer.iterator_at(cache.m_range.first),
buffer.iterator_at(cache.m_range.second), m_regex};
RegexIterator re_end;
for (; re_it != re_end; ++re_it)
m_cache_matches.push_back(*re_it);
{
cache.m_matches.emplace_back();
auto& match = cache.m_matches.back();
for (auto& sub : *re_it)
match.emplace_back(sub.first.coord(), sub.second.coord());
}
}
};