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only highlight actually displayed regions

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This commit is contained in:
Maxime Coste 2014-01-17 23:39:01 +00:00
parent 79c6d609c9
commit e1eec8903a
1 changed files with 7 additions and 2 deletions
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9
src/highlighters.cc
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@ -525,9 +525,14 @@ public:
void operator()(const Context& context, DisplayBuffer& display_buffer)
{
auto range = display_buffer.range();
auto& regions = update_cache_ifn(context.buffer());
for (auto& region : regions)
m_func(context, display_buffer, region.begin, region.end);
auto begin = std::lower_bound(regions.begin(), regions.end(), range.first,
[](const Region& r, const BufferCoord& c) { return r.end < c; });
auto end = std::lower_bound(begin, regions.end(), range.second,
[](const Region& r, const BufferCoord& c) { return r.begin < c; });
for (; begin != end; ++begin)
m_func(context, display_buffer, begin->begin, begin->end);
}
private:
Regex m_begin;