695 lines
21 KiB
C++
695 lines
21 KiB
C++
#include "command_manager.hh"
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#include "alias_registry.hh"
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#include "assert.hh"
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#include "context.hh"
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#include "register_manager.hh"
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#include "shell_manager.hh"
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#include "utils.hh"
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#include "optional.hh"
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#include "containers.hh"
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#include <algorithm>
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namespace Kakoune
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{
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bool CommandManager::command_defined(const String& command_name) const
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{
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return m_commands.find(command_name) != m_commands.end();
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}
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void CommandManager::register_command(String command_name,
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Command command,
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String docstring,
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ParameterDesc param_desc,
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CommandFlags flags,
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CommandHelper helper,
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CommandCompleter completer)
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{
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m_commands[command_name] = { std::move(command),
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std::move(docstring),
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std::move(param_desc),
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flags,
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std::move(helper),
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std::move(completer) };
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}
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struct parse_error : runtime_error
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{
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parse_error(StringView error)
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: runtime_error{format("parse error: {}", error)} {}
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};
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namespace
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{
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struct Reader
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{
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public:
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Reader(StringView s) : str{s}, pos{}, coord{} {}
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[[gnu::always_inline]]
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char operator*() const { return str[pos]; }
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Reader& operator++()
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{
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if (str[pos++] == '\n')
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{
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++coord.line;
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coord.column = 0;
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}
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else
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++coord.column;
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return *this;
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}
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[[gnu::always_inline]]
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explicit operator bool() const { return pos < str.length(); }
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[[gnu::always_inline]]
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StringView substr_from(ByteCount start) const
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{
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return str.substr(start, pos - start);
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}
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Optional<char> peek_next() const
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{
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if (pos+1 != str.length())
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return str[pos+1];
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return {};
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}
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StringView str;
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ByteCount pos;
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DisplayCoord coord;
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};
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bool is_command_separator(char c)
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{
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return c == ';' or c == '\n';
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}
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template<typename Func>
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String get_until_delimiter(Reader& reader, Func is_delimiter)
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{
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auto beg = reader.pos;
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String str;
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bool was_antislash = false;
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while (reader)
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{
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const char c = *reader;
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if (is_delimiter(c))
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{
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str += reader.substr_from(beg);
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if (was_antislash)
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{
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str.back() = c;
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beg = reader.pos+1;
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}
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else
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return str;
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}
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was_antislash = c == '\\';
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++reader;
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}
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if (beg < reader.str.length())
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str += reader.substr_from(beg);
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return str;
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}
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[[gnu::always_inline]]
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inline String get_until_delimiter(Reader& reader, char c)
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{
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return get_until_delimiter(reader, [c](char ch) { return c == ch; });
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}
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StringView get_until_closing_delimiter(Reader& reader, char opening_delimiter,
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char closing_delimiter)
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{
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kak_assert(reader.str[reader.pos-1] == opening_delimiter);
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int level = 0;
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auto start = reader.pos;
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while (reader)
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{
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const char c = *reader;
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if (c == opening_delimiter)
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++level;
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else if (c == closing_delimiter)
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{
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if (level > 0)
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--level;
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else
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break;
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}
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++reader;
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}
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return reader.substr_from(start);
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}
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struct unknown_expand : parse_error
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{
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unknown_expand(StringView name)
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: parse_error{format("unknown expand '{}'", name)} {}
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};
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template<bool throw_on_invalid>
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Token::Type token_type(StringView type_name)
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{
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if (type_name == "")
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return Token::Type::RawQuoted;
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else if (type_name == "sh")
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return Token::Type::ShellExpand;
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else if (type_name == "reg")
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return Token::Type::RegisterExpand;
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else if (type_name == "opt")
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return Token::Type::OptionExpand;
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else if (type_name == "val")
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return Token::Type::ValExpand;
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else if (type_name == "arg")
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return Token::Type::ArgExpand;
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else if (throw_on_invalid)
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throw unknown_expand{type_name};
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else
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return Token::Type::RawQuoted;
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}
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void skip_blanks_and_comments(Reader& reader)
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{
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while (reader)
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{
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const char c = *reader;
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if (is_horizontal_blank(c))
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++reader;
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else if (c == '\\' and reader.peek_next().value_or('\0') == '\n')
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++(++reader);
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else if (c == '#')
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{
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for (bool eol = false; reader and not eol; ++reader)
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eol = *reader == '\n';
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}
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else
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break;
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}
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}
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template<bool throw_on_unterminated>
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Token parse_percent_token(Reader& reader)
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{
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++reader;
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const ByteCount type_start = reader.pos;
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while (reader and isalpha(*reader))
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++reader;
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StringView type_name = reader.substr_from(type_start);
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if (throw_on_unterminated and not reader)
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throw parse_error{format("expected a string delimiter after '%{}'",
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type_name)};
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Token::Type type = token_type<throw_on_unterminated>(type_name);
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constexpr struct CharPair { char opening; char closing; } matching_pairs[] = {
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{ '(', ')' }, { '[', ']' }, { '{', '}' }, { '<', '>' }
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};
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char opening_delimiter = *reader;
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auto coord = reader.coord;
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++reader;
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auto start = reader.pos;
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auto it = find_if(matching_pairs, [opening_delimiter](const CharPair& cp)
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{ return opening_delimiter == cp.opening; });
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if (it != std::end(matching_pairs))
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{
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const char closing_delimiter = it->closing;
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auto token = get_until_closing_delimiter(reader, opening_delimiter,
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closing_delimiter);
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if (throw_on_unterminated and not reader)
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throw parse_error{format("{}:{}: unterminated string '%{}{}...{}'",
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coord.line, coord.column, type_name,
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opening_delimiter, closing_delimiter)};
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return {type, start, reader.pos, coord, token.str()};
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}
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else
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{
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String token = get_until_delimiter(reader, opening_delimiter);
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if (throw_on_unterminated and not reader)
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throw parse_error{format("{}:{}: unterminated string '%{}{}...{}'",
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coord.line, coord.column, type_name,
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opening_delimiter, opening_delimiter)};
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return {type, start, reader.pos, coord, std::move(token)};
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}
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}
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String expand_token(const Token& token, const Context& context,
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const ShellContext& shell_context)
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{
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auto& content = token.content();
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switch (token.type())
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{
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case Token::Type::ShellExpand:
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{
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auto str = ShellManager::instance().eval(
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content, context, {}, ShellManager::Flags::WaitForStdout,
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shell_context).first;
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int trailing_eol_count = 0;
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for (auto c : str | reverse())
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{
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if (c != '\n')
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break;
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++trailing_eol_count;
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}
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str.resize(str.length() - trailing_eol_count, 0);
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return str;
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}
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case Token::Type::RegisterExpand:
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return context.main_sel_register_value(content).str();
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case Token::Type::OptionExpand:
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return context.options()[content].get_as_string();
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case Token::Type::ValExpand:
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{
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auto it = shell_context.env_vars.find(content);
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if (it != shell_context.env_vars.end())
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return it->value;
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return ShellManager::instance().get_val(content, context);
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}
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case Token::Type::ArgExpand:
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{
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auto& params = shell_context.params;
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if (content == '@')
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return join(params, ' ');
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const int arg = str_to_int(content)-1;
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if (arg < 0)
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throw runtime_error("invalid argument index");
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return arg < params.size() ? params[arg] : String{};
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}
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case Token::Type::RawEval:
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return expand(content, context, shell_context);
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case Token::Type::Raw:
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case Token::Type::RawQuoted:
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return content;
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default: kak_assert(false);
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}
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return {};
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}
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}
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template<bool throw_on_unterminated>
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TokenList parse(StringView line)
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{
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TokenList result;
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Reader reader{line};
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while (reader)
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{
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skip_blanks_and_comments(reader);
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ByteCount start = reader.pos;
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auto coord = reader.coord;
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const char c = *reader;
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if (c == '"' or c == '\'')
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{
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start = (++reader).pos;
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String token = get_until_delimiter(reader, c);
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if (throw_on_unterminated and not reader)
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throw parse_error{format("unterminated string {0}...{0}", c)};
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result.emplace_back(c == '"' ? Token::Type::RawEval
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: Token::Type::RawQuoted,
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start, reader.pos, coord, std::move(token));
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}
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else if (c == '%')
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result.push_back(
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parse_percent_token<throw_on_unterminated>(reader));
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else
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{
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String str = get_until_delimiter(reader, [](char c) {
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return is_command_separator(c) or is_horizontal_blank(c);
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});
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if (not str.empty())
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result.emplace_back(Token::Type::Raw, start, reader.pos,
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coord, unescape(str, "%", '\\'));
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}
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if (is_command_separator(*reader))
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result.emplace_back(Token::Type::CommandSeparator,
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reader.pos, reader.pos+1, coord);
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++reader;
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}
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return result;
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}
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template<typename Postprocess>
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String expand_impl(StringView str, const Context& context,
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const ShellContext& shell_context,
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Postprocess postprocess)
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{
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Reader reader{str};
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String res;
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auto beg = 0_byte;
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while (reader)
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{
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char c = *reader;
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if (c == '\\')
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{
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c = *++reader;
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if (c == '%' or c == '\\')
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{
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res += reader.substr_from(beg);
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res.back() = c;
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beg = (++reader).pos;
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}
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}
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else if (c == '%')
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{
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res += reader.substr_from(beg);
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res += postprocess(expand_token(parse_percent_token<true>(reader),
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context, shell_context));
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beg = (++reader).pos;
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}
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else
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++reader;
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}
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res += reader.substr_from(beg);
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return res;
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}
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String expand(StringView str, const Context& context,
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const ShellContext& shell_context)
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{
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return expand_impl(str, context, shell_context, [](String s){ return s; });
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}
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String expand(StringView str, const Context& context,
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const ShellContext& shell_context,
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std::function<String (String)> postprocess)
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{
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return expand_impl(str, context, shell_context,
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[&](String s) { return postprocess(std::move(s)); });
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}
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struct command_not_found : runtime_error
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{
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command_not_found(StringView command)
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: runtime_error(command + " : no such command") {}
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};
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CommandManager::CommandMap::const_iterator
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CommandManager::find_command(const Context& context, const String& name) const
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{
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auto alias = context.aliases()[name];
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const String& cmd_name = alias.empty() ? name : alias.str();
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return m_commands.find(cmd_name);
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}
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void CommandManager::execute_single_command(CommandParameters params,
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Context& context,
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const ShellContext& shell_context,
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DisplayCoord pos)
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{
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if (params.empty())
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return;
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constexpr int max_command_depth = 100;
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if (m_command_depth > max_command_depth)
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throw runtime_error("maximum nested command depth hit");
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++m_command_depth;
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auto pop_cmd = on_scope_end([this] { --m_command_depth; });
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ParameterList param_view(params.begin()+1, params.end());
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auto command_it = find_command(context, params[0]);
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if (command_it == m_commands.end())
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throw command_not_found(params[0]);
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try
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{
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ParametersParser parameter_parser(param_view,
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command_it->second.param_desc);
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command_it->second.command(parameter_parser, context, shell_context);
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}
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catch (runtime_error& error)
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{
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throw runtime_error(format("{}:{}: '{}' {}", pos.line+1, pos.column+1,
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command_it->first, error.what()));
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}
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}
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void CommandManager::execute(StringView command_line,
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Context& context, const ShellContext& shell_context)
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{
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TokenList tokens = parse<true>(command_line);
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if (tokens.empty())
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return;
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DisplayCoord command_coord;
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Vector<String> params;
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for (auto it = tokens.begin(); it != tokens.end(); )
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{
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if (params.empty())
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command_coord = it->coord();
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if (it->type() == Token::Type::CommandSeparator)
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{
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execute_single_command(params, context, shell_context, command_coord);
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params.clear();
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}
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// Shell expand are retokenized
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else if (it->type() == Token::Type::ShellExpand)
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{
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auto new_tokens = parse<true>(expand_token(*it, context,
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shell_context));
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it = tokens.insert(tokens.erase(it),
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std::make_move_iterator(new_tokens.begin()),
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std::make_move_iterator(new_tokens.end()));
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continue; // skip incrementing, we already point to next token
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}
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else if (it->type() == Token::Type::ArgExpand and it->content() == '@')
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params.insert(params.end(), shell_context.params.begin(),
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shell_context.params.end());
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else
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params.push_back(expand_token(*it, context, shell_context));
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++it;
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}
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execute_single_command(params, context, shell_context, command_coord);
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}
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Optional<CommandInfo> CommandManager::command_info(const Context& context, StringView command_line) const
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{
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TokenList tokens = parse<false>(command_line);
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size_t cmd_idx = 0;
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for (size_t i = 0; i < tokens.size(); ++i)
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{
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if (tokens[i].type() == Token::Type::CommandSeparator)
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cmd_idx = i+1;
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}
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if (cmd_idx == tokens.size() or
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(tokens[cmd_idx].type() != Token::Type::Raw and
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tokens[cmd_idx].type() != Token::Type::RawQuoted))
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return {};
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auto cmd = find_command(context, tokens[cmd_idx].content());
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if (cmd == m_commands.end())
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return {};
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CommandInfo res;
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res.name = cmd->first;
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if (not cmd->second.docstring.empty())
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res.info += cmd->second.docstring + "\n";
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if (cmd->second.helper)
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{
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Vector<String> params;
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for (auto it = tokens.begin() + cmd_idx + 1;
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it != tokens.end() and it->type() != Token::Type::CommandSeparator;
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++it)
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{
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if (it->type() == Token::Type::Raw or
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it->type() == Token::Type::RawQuoted or
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it->type() == Token::Type::RawEval)
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params.push_back(it->content());
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}
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String helpstr = cmd->second.helper(context, params);
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if (not helpstr.empty())
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{
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if (helpstr.back() != '\n')
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helpstr += '\n';
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res.info += helpstr;
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}
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}
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String aliases;
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for (auto& alias : context.aliases().aliases_for(cmd->first))
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aliases += " " + alias;
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if (not aliases.empty())
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res.info += "Aliases:" + aliases + "\n";
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auto& switches = cmd->second.param_desc.switches;
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if (not switches.empty())
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{
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res.info += "Switches:\n";
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res.info += generate_switches_doc(switches);
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}
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return res;
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}
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Completions CommandManager::complete_command_name(const Context& context,
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StringView query, bool with_aliases) const
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{
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auto commands = m_commands
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| filter([](const CommandMap::value_type& cmd) { return not (cmd.second.flags & CommandFlags::Hidden); })
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| transform(std::mem_fn(&CommandMap::value_type::first));
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if (not with_aliases)
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return {0, query.length(), Kakoune::complete(query, query.length(), commands)};
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auto candidates = Kakoune::complete(query, query.length(), commands);
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return {0, query.length(), std::move(candidates)};
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}
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|
|
Completions CommandManager::complete(const Context& context,
|
|
CompletionFlags flags,
|
|
StringView command_line,
|
|
ByteCount cursor_pos)
|
|
{
|
|
TokenList tokens = parse<false>(command_line);
|
|
|
|
size_t cmd_idx = 0;
|
|
size_t tok_idx = tokens.size();
|
|
for (size_t i = 0; i < tokens.size(); ++i)
|
|
{
|
|
if (tokens[i].type() == Token::Type::CommandSeparator)
|
|
cmd_idx = i+1;
|
|
|
|
if (tokens[i].begin() <= cursor_pos and tokens[i].end() >= cursor_pos)
|
|
{
|
|
tok_idx = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
const bool is_last_token = tok_idx == tokens.size();
|
|
// command name completion
|
|
if (tokens.empty() or
|
|
(tok_idx == cmd_idx and (is_last_token or
|
|
tokens[tok_idx].type() == Token::Type::Raw or
|
|
tokens[tok_idx].type() == Token::Type::RawQuoted)))
|
|
{
|
|
auto cmd_start = is_last_token ? cursor_pos : tokens[tok_idx].begin();
|
|
StringView query = command_line.substr(cmd_start, cursor_pos - cmd_start);
|
|
return offset_pos(complete_command_name(context, query, true), cmd_start);
|
|
}
|
|
|
|
kak_assert(not tokens.empty());
|
|
|
|
ByteCount start = tok_idx < tokens.size() ?
|
|
tokens[tok_idx].begin() : cursor_pos;
|
|
ByteCount cursor_pos_in_token = cursor_pos - start;
|
|
|
|
const Token::Type type = tok_idx < tokens.size() ?
|
|
tokens[tok_idx].type() : Token::Type::Raw;
|
|
switch (type)
|
|
{
|
|
case Token::Type::OptionExpand:
|
|
return {start , cursor_pos,
|
|
GlobalScope::instance().option_registry().complete_option_name(
|
|
tokens[tok_idx].content(), cursor_pos_in_token) };
|
|
|
|
case Token::Type::ShellExpand:
|
|
return offset_pos(shell_complete(context, flags, tokens[tok_idx].content(),
|
|
cursor_pos_in_token), start);
|
|
|
|
case Token::Type::ValExpand:
|
|
return {start , cursor_pos,
|
|
ShellManager::instance().complete_env_var(
|
|
tokens[tok_idx].content(), cursor_pos_in_token) };
|
|
|
|
case Token::Type::Raw:
|
|
case Token::Type::RawQuoted:
|
|
case Token::Type::RawEval:
|
|
{
|
|
if (tokens[cmd_idx].type() != Token::Type::Raw)
|
|
return Completions{};
|
|
|
|
const String& command_name = tokens[cmd_idx].content();
|
|
if (command_name != m_last_complete_command)
|
|
{
|
|
m_last_complete_command = command_name;
|
|
flags |= CompletionFlags::Start;
|
|
}
|
|
|
|
auto command_it = find_command(context, command_name);
|
|
if (command_it == m_commands.end() or
|
|
not command_it->second.completer)
|
|
return Completions();
|
|
|
|
Vector<String> params;
|
|
for (auto it = tokens.begin() + cmd_idx + 1; it != tokens.end(); ++it)
|
|
params.push_back(it->content());
|
|
if (tok_idx == tokens.size())
|
|
params.emplace_back("");
|
|
Completions completions = offset_pos(command_it->second.completer(
|
|
context, flags, params, tok_idx - cmd_idx - 1,
|
|
cursor_pos_in_token), start);
|
|
|
|
if (type != Token::Type::RawQuoted)
|
|
{
|
|
StringView to_escape = type == Token::Type::Raw ? "% \t;" : "%";
|
|
for (auto& candidate : completions.candidates)
|
|
candidate = escape(candidate, to_escape, '\\');
|
|
}
|
|
|
|
return completions;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return Completions{};
|
|
}
|
|
|
|
Completions CommandManager::complete(const Context& context,
|
|
CompletionFlags flags,
|
|
CommandParameters params,
|
|
size_t token_to_complete,
|
|
ByteCount pos_in_token)
|
|
{
|
|
StringView prefix = params[token_to_complete].substr(0, pos_in_token);
|
|
|
|
if (token_to_complete == 0)
|
|
return complete_command_name(context, prefix, true);
|
|
else
|
|
{
|
|
const String& command_name = params[0];
|
|
if (command_name != m_last_complete_command)
|
|
{
|
|
m_last_complete_command = command_name;
|
|
flags |= CompletionFlags::Start;
|
|
}
|
|
|
|
auto command_it = find_command(context, command_name);
|
|
if (command_it != m_commands.end() and command_it->second.completer)
|
|
return command_it->second.completer(
|
|
context, flags, params.subrange(1),
|
|
token_to_complete-1, pos_in_token);
|
|
}
|
|
return Completions{};
|
|
}
|
|
|
|
}
|