96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
#ifndef completion_hh_INCLUDED
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#define completion_hh_INCLUDED
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#include <functional>
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#include "units.hh"
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#include "string.hh"
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#include "vector.hh"
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namespace Kakoune
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{
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class Context;
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using CandidateList = Vector<String>;
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struct Completions
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{
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CandidateList candidates;
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ByteCount start;
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ByteCount end;
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Completions()
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: start(0), end(0) {}
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Completions(ByteCount start, ByteCount end)
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: start(start), end(end) {}
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Completions(ByteCount start, ByteCount end, CandidateList candidates)
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: start(start), end(end), candidates(std::move(candidates)) {}
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};
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enum class CompletionFlags
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{
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None,
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Fast
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};
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using Completer = std::function<Completions (const Context&, CompletionFlags,
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StringView, ByteCount)>;
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inline Completions complete_nothing(const Context& context, CompletionFlags,
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StringView, ByteCount cursor_pos)
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{
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return Completions(cursor_pos, cursor_pos);
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}
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Completions shell_complete(const Context& context, CompletionFlags,
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StringView, ByteCount cursor_pos);
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inline Completions offset_pos(Completions completion, ByteCount offset)
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{
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return { completion.start + offset, completion.end + offset,
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std::move(completion.candidates) };
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}
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namespace detail
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{
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template<typename Str, typename Func>
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void do_matches(Str&& str, StringView prefix,
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CandidateList* res, Func match_func)
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{
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if (match_func(str, prefix))
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res->push_back(str);
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}
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template<typename Str, typename Func, typename... Rest>
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void do_matches(Str&& str, StringView prefix,
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CandidateList* res, Func match_func, Rest... rest)
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{
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do_matches(str, prefix, res, match_func);
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do_matches(str, prefix, res+1, rest...);
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}
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}
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template<typename Container, typename... MatchFunc>
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CandidateList complete(StringView prefix, ByteCount cursor_pos,
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const Container& container, MatchFunc... match_func)
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{
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CandidateList res[sizeof...(match_func)];
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auto real_prefix = prefix.substr(0, cursor_pos);
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for (const auto& elem : container)
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detail::do_matches(elem, real_prefix, res, match_func...);
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auto it = find_if(res, [](CandidateList& c) { return not c.empty(); });
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return it == end(res) ? CandidateList{} : std::move(*it);
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}
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template<typename Container>
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CandidateList complete(StringView prefix, ByteCount cursor_pos,
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const Container& container)
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{
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return complete(prefix, cursor_pos, container, prefix_match);
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}
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}
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#endif // completion_hh_INCLUDED
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