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RegexColorizer only cache a range instead of the whole buffer

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This commit is contained in:
Maxime Coste 2012-08-15 17:24:08 +02:00
parent 6e70b805df
commit 9e3323bf68
1 changed files with 15 additions and 10 deletions
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25
src/highlighters.cc
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@ -60,13 +60,13 @@ class RegexColorizer
public:
RegexColorizer(Regex regex, ColorSpec colors)
: m_regex(std::move(regex)), m_colors(std::move(colors)),
m_cache_buffer(nullptr), m_cache_timestamp(0)
m_cache_timestamp(0)
{
}
void operator()(DisplayBuffer& display_buffer)
{
update_cache_ifn(display_buffer.range().first.buffer());
update_cache_ifn(display_buffer.range());
for (auto& match : m_cache_matches)
{
for (size_t n = 0; n < match.size(); ++n)
@ -85,24 +85,29 @@ public:
}
private:
const Buffer* m_cache_buffer;
size_t m_cache_timestamp;
BufferRange m_cache_range;
size_t m_cache_timestamp;
std::vector<boost::match_results<BufferIterator>> m_cache_matches;
Regex m_regex;
ColorSpec m_colors;
void update_cache_ifn(const Buffer& buffer)
void update_cache_ifn(const BufferRange& range)
{
if (&buffer == m_cache_buffer and
buffer.timestamp() == m_cache_timestamp)
const Buffer* newbuf = &range.first.buffer();
if (m_cache_range.first.is_valid() and
&m_cache_range.first.buffer() == newbuf and
newbuf->timestamp() == m_cache_timestamp and
range.first >= m_cache_range.first and
range.second <= m_cache_range.second)
return;
m_cache_matches.clear();
m_cache_buffer = &buffer;
m_cache_timestamp = buffer.timestamp();
m_cache_range.first = range.first - 10;
m_cache_range.second = range.second + 10;
m_cache_timestamp = newbuf->timestamp();
RegexIterator re_it(buffer.begin(), buffer.end(), m_regex);
RegexIterator re_it(m_cache_range.first, m_cache_range.second, m_regex);
RegexIterator re_end;
for (; re_it != re_end; ++re_it)
m_cache_matches.push_back(*re_it);