510 lines
16 KiB
C++
510 lines
16 KiB
C++
#include "insert_completer.hh"
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#include "buffer_manager.hh"
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#include "buffer_utils.hh"
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#include "context.hh"
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#include "display_buffer.hh"
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#include "face_registry.hh"
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#include "file.hh"
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#include "regex.hh"
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#include "user_interface.hh"
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#include "window.hh"
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#include "word_db.hh"
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#include "utf8_iterator.hh"
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#include <numeric>
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namespace Kakoune
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{
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using StringList = Vector<String, MemoryDomain::Options>;
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String option_to_string(const InsertCompleterDesc& opt)
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{
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switch (opt.mode)
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{
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case InsertCompleterDesc::Word:
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return "word=" + (opt.param ? *opt.param : "");
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case InsertCompleterDesc::Filename:
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return "filename";
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case InsertCompleterDesc::Option:
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return "option=" + (opt.param ? *opt.param : "");
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}
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kak_assert(false);
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return "";
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}
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void option_from_string(StringView str, InsertCompleterDesc& opt)
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{
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if (str.substr(0_byte, 7_byte) == "option=")
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{
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opt.mode = InsertCompleterDesc::Option;
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opt.param = str.substr(7_byte).str();
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return;
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}
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else if (str.substr(0_byte, 5_byte) == "word=")
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{
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auto param = str.substr(5_byte);
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if (param == "all" or param == "buffer")
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{
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opt.mode = InsertCompleterDesc::Word;
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opt.param = param.str();
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return;
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}
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}
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else if (str == "filename")
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{
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opt.mode = InsertCompleterDesc::Filename;
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opt.param = Optional<String>{};
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return;
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}
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throw runtime_error(format("invalid completer description: '{}'", str));
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}
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namespace
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{
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WordDB& get_word_db(const Buffer& buffer)
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{
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static const ValueId word_db_id = ValueId::get_free_id();
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Value& cache_val = buffer.values()[word_db_id];
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if (not cache_val)
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cache_val = Value(WordDB{buffer});
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return cache_val.as<WordDB>();
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}
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template<bool other_buffers>
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InsertCompletion complete_word(const Buffer& buffer, ByteCoord cursor_pos)
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{
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using Utf8It = utf8::iterator<BufferIterator>;
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Utf8It pos{buffer.iterator_at(cursor_pos), buffer};
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if (pos == buffer.begin() or not is_word(*(pos-1)))
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return {};
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auto end = Utf8It{buffer.iterator_at(cursor_pos), buffer};
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auto begin = end-1;
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while (begin != buffer.begin() and is_word(*begin))
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--begin;
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if (not is_word(*begin))
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++begin;
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String prefix{begin.base(), end.base()};
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while (end != buffer.end() and is_word(*end))
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++end;
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String current_word{begin.base(), end.base()};
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struct RankedMatchAndBuffer : RankedMatch
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{
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RankedMatchAndBuffer(const RankedMatch& m, const Buffer* b = nullptr)
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: RankedMatch{m}, buffer{b} {}
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using RankedMatch::operator==;
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using RankedMatch::operator<;
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bool operator==(StringView other) const { return candidate() == other; }
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const Buffer* buffer;
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};
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Vector<RankedMatchAndBuffer> matches;
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auto add_matches = [&](const Buffer& buf) {
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auto& word_db = get_word_db(buf);
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auto bufmatches = word_db.find_matching(prefix);
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for (auto& m : bufmatches)
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matches.push_back({ m, &buf });
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};
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add_matches(buffer);
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if (get_word_db(buffer).get_word_occurences(current_word) <= 1)
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unordered_erase(matches, StringView{current_word});
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if (other_buffers)
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{
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for (const auto& buf : BufferManager::instance())
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{
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if (buf.get() == &buffer)
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continue;
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add_matches(*buf);
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}
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}
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unordered_erase(matches, StringView{prefix});
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std::sort(matches.begin(), matches.end());
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matches.erase(std::unique(matches.begin(), matches.end()), matches.end());
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const auto longest = std::accumulate(matches.begin(), matches.end(), 0_char,
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[](const CharCount& lhs, const RankedMatchAndBuffer& rhs)
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{ return std::max(lhs, rhs.candidate().char_length()); });
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InsertCompletion::CandidateList candidates;
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candidates.reserve(matches.size());
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for (auto& m : matches)
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{
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DisplayLine menu_entry;
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if (m.buffer)
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{
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const auto pad_len = longest + 1 - m.candidate().char_length();
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menu_entry.push_back(m.candidate().str());
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menu_entry.push_back(String{' ', pad_len});
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menu_entry.push_back({ m.buffer->display_name(), get_face("MenuInfo") });
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}
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else
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menu_entry.push_back(m.candidate().str());
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candidates.push_back({m.candidate().str(), "", std::move(menu_entry)});
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}
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return { begin.base().coord(), cursor_pos, std::move(candidates), buffer.timestamp() };
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}
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template<bool require_slash>
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InsertCompletion complete_filename(const Buffer& buffer, ByteCoord cursor_pos,
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OptionManager& options)
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{
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auto pos = buffer.iterator_at(cursor_pos);
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auto begin = pos;
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auto is_filename = [](char c)
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{
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return isalnum(c) or c == '/' or c == '.' or c == '_' or c == '-';
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};
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while (begin != buffer.begin() and is_filename(*(begin-1)))
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--begin;
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if (begin == pos)
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return {};
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String prefix{begin, pos};
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if (require_slash and not contains(prefix, '/'))
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return {};
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InsertCompletion::CandidateList candidates;
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if (prefix.front() == '/')
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{
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for (auto& filename : Kakoune::complete_filename(prefix, Regex{}))
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candidates.push_back({ filename, "", filename });
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}
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else
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{
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for (auto dir : options["path"].get<StringList>())
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{
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if (not dir.empty() and dir.back() != '/')
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dir += '/';
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for (auto& filename : Kakoune::complete_filename(dir + prefix, Regex{}))
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{
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StringView candidate = filename.substr(dir.length());
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candidates.push_back({ candidate.str(), "", candidate.str() });
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}
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}
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}
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if (candidates.empty())
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return {};
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return { begin.coord(), pos.coord(), std::move(candidates), buffer.timestamp() };
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}
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InsertCompletion complete_option(const Buffer& buffer, ByteCoord cursor_pos,
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OptionManager& options, StringView option_name)
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{
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const StringList& opt = options[option_name].get<StringList>();
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if (opt.empty())
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return {};
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auto& desc = opt[0];
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static const Regex re(R"((\d+)\.(\d+)(?:\+(\d+))?@(\d+))");
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MatchResults<String::const_iterator> match;
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if (regex_match(desc.begin(), desc.end(), match, re))
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{
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ByteCoord coord{ str_to_int({match[1].first, match[1].second}) - 1,
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str_to_int({match[2].first, match[2].second}) - 1 };
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if (not buffer.is_valid(coord))
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return {};
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auto end = cursor_pos;
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if (match[3].matched)
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{
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ByteCount len = str_to_int({match[3].first, match[3].second});
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end = buffer.advance(coord, len);
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}
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size_t timestamp = (size_t)str_to_int({match[4].first, match[4].second});
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auto changes = buffer.changes_since(timestamp);
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if (find_if(changes, [&](const Buffer::Change& change){
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return change.begin < coord;
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}) != changes.end())
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return {};
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if (cursor_pos.line == coord.line and cursor_pos.column >= coord.column)
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{
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StringView query = buffer[coord.line].substr(
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coord.column, cursor_pos.column - coord.column);
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const CharCount tabstop = options["tabstop"].get<int>();
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const CharCount column = get_column(buffer, tabstop, cursor_pos);
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struct RankedMatchAndInfo : RankedMatch
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{
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using RankedMatch::RankedMatch;
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using RankedMatch::operator==;
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using RankedMatch::operator<;
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StringView docstring;
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DisplayLine menu_entry;
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};
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Vector<RankedMatchAndInfo> matches;
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for (auto it = opt.begin() + 1; it != opt.end(); ++it)
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{
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auto splitted = split(*it, '@');
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if (splitted.empty())
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continue;
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if (RankedMatchAndInfo match{splitted[0], query})
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{
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match.docstring = splitted.size() > 1 ? splitted[1] : StringView{};
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match.menu_entry = splitted.size() > 2 ?
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parse_display_line(expand_tabs(splitted[2], tabstop, column))
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: DisplayLine{ expand_tabs(splitted[0], tabstop, column) };
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matches.push_back(std::move(match));
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}
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}
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std::sort(matches.begin(), matches.end());
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InsertCompletion::CandidateList candidates;
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candidates.reserve(matches.size());
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for (auto& match : matches)
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candidates.push_back({ match.candidate().str(), match.docstring.str(),
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std::move(match.menu_entry) });
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return { coord, end, std::move(candidates), timestamp };
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}
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}
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return {};
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}
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InsertCompletion complete_line(const Buffer& buffer, OptionManager& options, ByteCoord cursor_pos)
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{
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const CharCount tabstop = options["tabstop"].get<int>();
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const CharCount column = get_column(buffer, tabstop, cursor_pos);
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StringView prefix = buffer[cursor_pos.line].substr(0_byte, cursor_pos.column);
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InsertCompletion::CandidateList candidates;
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for (LineCount l = 0_line; l < buffer.line_count(); ++l)
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{
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if (l == cursor_pos.line)
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continue;
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ByteCount len = buffer[l].length();
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if (len > cursor_pos.column and std::equal(prefix.begin(), prefix.end(), buffer[l].begin()))
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{
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StringView candidate = buffer[l].substr(0_byte, len-1);
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candidates.push_back({candidate.str(), "",
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expand_tabs(candidate, tabstop, column)});
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}
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}
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if (candidates.empty())
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return {};
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std::sort(candidates.begin(), candidates.end());
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candidates.erase(std::unique(candidates.begin(), candidates.end()), candidates.end());
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return { cursor_pos.line, cursor_pos, std::move(candidates), buffer.timestamp() };
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}
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}
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InsertCompleter::InsertCompleter(const Context& context)
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: m_context(context), m_options(context.options())
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{
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m_options.register_watcher(*this);
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}
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InsertCompleter::~InsertCompleter()
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{
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m_options.unregister_watcher(*this);
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}
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void InsertCompleter::select(int offset, Vector<Key>& keystrokes)
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{
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if (not setup_ifn())
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return;
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auto& buffer = m_context.buffer();
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m_current_candidate = (m_current_candidate + offset) % (int)m_matching_candidates.size();
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if (m_current_candidate < 0)
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m_current_candidate += m_matching_candidates.size();
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const InsertCompletion::Candidate& candidate = m_matching_candidates[m_current_candidate];
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auto& selections = m_context.selections();
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const auto& cursor_pos = selections.main().cursor();
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const auto prefix_len = buffer.distance(m_completions.begin, cursor_pos);
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const auto suffix_len = std::max(0_byte, buffer.distance(cursor_pos, m_completions.end));
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auto ref = buffer.string(m_completions.begin, m_completions.end);
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for (auto& sel : selections)
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{
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const auto& cursor = sel.cursor();
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auto pos = buffer.iterator_at(cursor);
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if (cursor.column >= prefix_len and (pos + suffix_len) != buffer.end() and
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std::equal(ref.begin(), ref.end(), pos - prefix_len))
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{
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pos = buffer.erase(pos - prefix_len, pos + suffix_len);
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buffer.insert(pos, candidate.completion);
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const_cast<SelectionList&>(selections).update();
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}
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}
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m_completions.end = cursor_pos;
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m_completions.begin = buffer.advance(cursor_pos, -candidate.completion.length());
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m_completions.timestamp = buffer.timestamp();
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if (m_context.has_ui())
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{
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m_context.ui().menu_select(m_current_candidate);
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if (not candidate.docstring.empty())
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m_context.ui().info_show(candidate.completion, candidate.docstring, CharCoord{},
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get_face("Information"), InfoStyle::MenuDoc);
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}
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for (auto i = 0_byte; i < prefix_len; ++i)
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keystrokes.push_back(Key::Backspace);
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for (auto i = 0_byte; i < suffix_len; ++i)
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keystrokes.push_back(Key::Delete);
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for (auto& c : candidate.completion)
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keystrokes.push_back(c);
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}
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void InsertCompleter::update()
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{
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if (m_explicit_completer and try_complete(m_explicit_completer))
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return;
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reset();
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setup_ifn();
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}
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void InsertCompleter::reset()
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{
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m_completions = InsertCompletion{};
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m_explicit_completer = nullptr;
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if (m_context.has_ui())
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{
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m_context.ui().menu_hide();
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m_context.ui().info_hide();
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}
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}
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bool InsertCompleter::setup_ifn()
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{
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using namespace std::placeholders;
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if (not m_completions.is_valid())
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{
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auto& completers = m_options["completers"].get<InsertCompleterDescList>();
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for (auto& completer : completers)
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{
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if (completer.mode == InsertCompleterDesc::Filename and
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try_complete([this](const Buffer& buffer, ByteCoord cursor_pos) {
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return complete_filename<true>(buffer, cursor_pos,
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m_options);
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}))
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return true;
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if (completer.mode == InsertCompleterDesc::Option and
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try_complete([&,this](const Buffer& buffer, ByteCoord cursor_pos) {
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return complete_option(buffer, cursor_pos,
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m_options, *completer.param);
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}))
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return true;
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if (completer.mode == InsertCompleterDesc::Word and
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*completer.param == "buffer" and
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try_complete(complete_word<false>))
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return true;
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if (completer.mode == InsertCompleterDesc::Word and
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*completer.param == "all" and
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try_complete(complete_word<true>))
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return true;
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}
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return false;
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}
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return true;
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}
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void InsertCompleter::menu_show()
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{
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if (not m_context.has_ui())
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return;
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CharCoord menu_pos = m_context.window().display_position(m_completions.begin);
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Vector<DisplayLine> menu_entries;
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for (auto& candidate : m_matching_candidates)
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menu_entries.push_back(candidate.menu_entry);
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m_context.ui().menu_show(menu_entries, menu_pos,
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get_face("MenuForeground"),
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get_face("MenuBackground"),
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MenuStyle::Inline);
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m_context.ui().menu_select(m_current_candidate);
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}
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void InsertCompleter::on_option_changed(const Option& opt)
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{
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// Do not reset the menu if the user has selected an entry
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if (not m_matching_candidates.empty() and
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m_current_candidate != m_matching_candidates.size() - 1)
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return;
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auto& completers = m_options["completers"].get<InsertCompleterDescList>();
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for (auto& completer : completers)
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{
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if (completer.mode == InsertCompleterDesc::Option and
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*completer.param == opt.name())
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{
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reset();
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setup_ifn();
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break;
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}
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}
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}
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template<typename CompleteFunc>
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bool InsertCompleter::try_complete(CompleteFunc complete_func)
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{
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auto& buffer = m_context.buffer();
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ByteCoord cursor_pos = m_context.selections().main().cursor();
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try
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{
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m_completions = complete_func(buffer, cursor_pos);
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}
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catch (runtime_error& e)
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{
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write_to_debug_buffer(format("error while trying to run completer: {}", e.what()));
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return false;
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}
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if (not m_completions.is_valid())
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return false;
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kak_assert(cursor_pos >= m_completions.begin);
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m_matching_candidates = m_completions.candidates;
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m_current_candidate = m_matching_candidates.size();
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menu_show();
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m_matching_candidates.push_back({buffer.string(m_completions.begin, m_completions.end), ""});
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return true;
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}
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void InsertCompleter::explicit_file_complete()
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{
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auto func = [this](const Buffer& buffer, ByteCoord cursor_pos) {
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return complete_filename<false>(buffer, cursor_pos, m_options);
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};
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try_complete(func);
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m_explicit_completer = func;
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}
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void InsertCompleter::explicit_word_complete()
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{
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try_complete(complete_word<true>);
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m_explicit_completer = complete_word<true>;
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}
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void InsertCompleter::explicit_line_complete()
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{
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auto func = [this](const Buffer& buffer, ByteCoord cursor_pos) {
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return complete_line(buffer, m_options, cursor_pos);
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};
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try_complete(func);
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m_explicit_completer = func;
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}
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}
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