kakoune/src/completion.hh

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#ifndef completion_hh_INCLUDED
#define completion_hh_INCLUDED
#include <functional>
#include <algorithm>
#include "flags.hh"
#include "units.hh"
#include "string.hh"
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#include "vector.hh"
#include "ranked_match.hh"
namespace Kakoune
{
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class Context;
using CandidateList = Vector<String, MemoryDomain::Completion>;
struct Completions
{
CandidateList candidates;
ByteCount start;
ByteCount end;
Completions()
: start(0), end(0) {}
Completions(ByteCount start, ByteCount end)
: start(start), end(end) {}
Completions(ByteCount start, ByteCount end, CandidateList candidates)
: start(start), end(end), candidates(std::move(candidates)) {}
};
enum class CompletionFlags
{
None = 0,
Fast = 1 << 0,
Start = 1 << 2,
};
template<> struct WithBitOps<CompletionFlags> : std::true_type {};
using Completer = std::function<Completions (const Context&, CompletionFlags,
StringView, ByteCount)>;
inline Completions complete_nothing(const Context& context, CompletionFlags,
StringView, ByteCount cursor_pos)
{
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return {cursor_pos, cursor_pos};
}
Completions shell_complete(const Context& context, CompletionFlags,
StringView, ByteCount cursor_pos);
inline Completions offset_pos(Completions completion, ByteCount offset)
{
return { completion.start + offset, completion.end + offset,
std::move(completion.candidates) };
}
template<typename Container>
CandidateList complete(StringView query, ByteCount cursor_pos,
const Container& container)
{
using std::begin;
static_assert(not std::is_same<decltype(*begin(container)), String>::value,
"complete require long lived strings, not temporaries");
query = query.substr(0, cursor_pos);
Vector<RankedMatch> matches;
for (const auto& str : container)
{
if (RankedMatch match{str, query})
matches.push_back(match);
}
std::sort(matches.begin(), matches.end());
CandidateList res;
for (auto& m : matches)
res.push_back(m.candidate().str());
return res;
}
}
#endif // completion_hh_INCLUDED