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search/highlighting.cpp
60 строк
1 KB
Maxim Pimenov
Review fixes.
25 окт 2017, 19:08
25 окт 2017, 19:08
7a37590
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#include "search/highlighting.hpp" using namespace std; namespace { // Makes continuous range for tokens and prefix. template <class Iter, class Value> class CombinedIterator { Iter m_cur; Iter m_end; Value const * m_val; public: CombinedIterator(Iter cur, Iter end, Value const * val) : m_cur(cur), m_end(end), m_val(val) {} Value const & operator*() const { ASSERT(m_val != nullptr || m_cur != m_end, ("dereferencing of an empty iterator")); if (m_cur != m_end) return *m_cur; return *m_val; } CombinedIterator & operator++() { if (m_cur != m_end) ++m_cur; else m_val = nullptr; return *this; } bool operator==(CombinedIterator const & other) const { return m_val == other.m_val && m_cur == other.m_cur; } bool operator!=(CombinedIterator const & other) const { return !(*this == other); } }; } // namespace namespace search { void HighlightResult(QueryTokens const & tokens, strings::UniString const & prefix, Result & res) { using Iter = QueryTokens::const_iterator; using CombinedIter = CombinedIterator<Iter, strings::UniString>; CombinedIter beg(tokens.begin(), tokens.end(), prefix.empty() ? nullptr : &prefix); CombinedIter end(tokens.end() /* cur */, tokens.end() /* end */, nullptr); auto assignHighlightRange = [&](pair<uint16_t, uint16_t> const & range) { res.AddHighlightRange(range); }; SearchStringTokensIntersectionRanges(res.GetString(), beg, end, assignHighlightRange); } } // namespace search