2011-09-07 20:16:56 +02:00
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#include "command_manager.hh"
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#include "utils.hh"
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2011-09-16 11:18:51 +02:00
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#include "assert.hh"
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2012-02-13 22:38:07 +01:00
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#include "context.hh"
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2011-09-16 11:18:51 +02:00
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2011-09-07 20:16:56 +02:00
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#include <algorithm>
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2012-02-13 22:38:07 +01:00
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#include <cstring>
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#include <sys/types.h>
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#include <sys/wait.h>
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2011-09-07 20:16:56 +02:00
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namespace Kakoune
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{
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2011-09-16 11:18:51 +02:00
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void CommandManager::register_command(const std::string& command_name, Command command,
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2012-01-15 04:02:08 +01:00
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unsigned flags,
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2011-09-16 11:18:51 +02:00
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const CommandCompleter& completer)
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2011-09-07 20:16:56 +02:00
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{
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2012-01-15 04:02:08 +01:00
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m_commands[command_name] = CommandDescriptor { command, flags, completer };
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2011-09-07 20:16:56 +02:00
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}
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2012-02-03 20:14:35 +01:00
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void CommandManager::register_commands(const memoryview<std::string>& command_names, Command command,
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unsigned flags,
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const CommandCompleter& completer)
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2011-09-07 20:16:56 +02:00
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{
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for (auto command_name : command_names)
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2012-01-15 04:02:08 +01:00
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register_command(command_name, command, flags, completer);
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2011-09-07 20:16:56 +02:00
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}
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2012-02-13 22:38:07 +01:00
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static bool is_blank(char c)
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{
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return c == ' ' or c == '\t' or c == '\n';
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}
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2011-09-13 23:16:48 +02:00
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typedef std::vector<std::pair<size_t, size_t>> TokenList;
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static TokenList split(const std::string& line)
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2011-09-07 20:16:56 +02:00
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{
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2011-09-13 23:16:48 +02:00
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TokenList result;
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2011-09-07 20:16:56 +02:00
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size_t pos = 0;
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2011-11-26 18:20:02 +01:00
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while (pos < line.length())
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2011-09-07 20:16:56 +02:00
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{
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2012-02-13 22:38:07 +01:00
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while(is_blank(line[pos]) and pos != line.length())
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2011-09-07 20:16:56 +02:00
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++pos;
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2012-02-13 22:38:07 +01:00
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size_t token_start = pos;
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if (line[pos] == '"' or line[pos] == '\'' or line[pos] == '`')
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2011-11-26 18:20:02 +01:00
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{
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2012-02-13 22:38:07 +01:00
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char delimiter = line[pos];
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2011-11-26 18:20:02 +01:00
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++pos;
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2012-02-13 22:38:07 +01:00
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token_start = delimiter == '`' ? pos - 1 : pos;
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2011-11-26 18:20:02 +01:00
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2012-02-13 22:38:07 +01:00
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while ((line[pos] != delimiter or line[pos-1] == '\\') and
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pos != line.length())
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++pos;
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2011-09-07 20:16:56 +02:00
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2012-02-13 22:38:07 +01:00
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if (delimiter == '`' and line[pos] == '`')
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++pos;
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}
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else
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while (not is_blank(line[pos]) and pos != line.length() and
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(line[pos] != ';' or line[pos-1] == '\\'))
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++pos;
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2011-09-07 20:16:56 +02:00
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2012-02-13 22:38:07 +01:00
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if (token_start != pos)
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result.push_back(std::make_pair(token_start, pos));
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2011-11-26 18:20:02 +01:00
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2012-01-15 02:37:35 +01:00
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if (line[pos] == ';')
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result.push_back(std::make_pair(pos, pos+1));
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2011-11-26 18:20:02 +01:00
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++pos;
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2011-09-07 20:16:56 +02:00
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}
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return result;
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}
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2011-09-09 20:40:59 +02:00
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struct command_not_found : runtime_error
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2011-09-07 20:16:56 +02:00
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{
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2011-09-09 20:40:59 +02:00
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command_not_found(const std::string& command)
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: runtime_error(command + " : no such command") {}
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2011-09-07 20:16:56 +02:00
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};
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2011-11-26 19:32:57 +01:00
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void CommandManager::execute(const std::string& command_line,
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const Context& context)
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2011-09-07 20:16:56 +02:00
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{
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2011-09-13 23:16:48 +02:00
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TokenList tokens = split(command_line);
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2011-09-07 20:16:56 +02:00
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if (tokens.empty())
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return;
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2012-02-03 20:14:35 +01:00
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std::vector<std::string> params;
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2012-01-14 15:02:54 +01:00
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for (auto it = tokens.begin(); it != tokens.end(); ++it)
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2011-09-13 23:16:48 +02:00
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{
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params.push_back(command_line.substr(it->first,
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it->second - it->first));
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}
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2011-09-07 20:16:56 +02:00
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2012-01-14 15:02:54 +01:00
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execute(params, context);
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2011-11-26 19:32:57 +01:00
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}
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2012-02-13 22:38:07 +01:00
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static void shell_eval(std::vector<std::string>& params,
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const std::string& cmdline,
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const Context& context)
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{
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int write_pipe[2];
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int read_pipe[2];
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pipe(write_pipe);
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pipe(read_pipe);
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if (pid_t pid = fork())
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{
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close(write_pipe[0]);
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close(read_pipe[1]);
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close(write_pipe[1]);
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std::string output;
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char buffer[1024];
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while (size_t size = read(read_pipe[0], buffer, 1024))
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output += std::string(buffer, buffer+size);
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close(read_pipe[0]);
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waitpid(pid, NULL, 0);
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TokenList tokens = split(output);
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for (auto it = tokens.begin(); it != tokens.end(); ++it)
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{
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params.push_back(output.substr(it->first,
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it->second - it->first));
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}
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}
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else
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{
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close(write_pipe[1]);
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close(read_pipe[0]);
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dup2(read_pipe[1], 1);
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dup2(write_pipe[0], 0);
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setenv("kak_bufname", context.buffer().name().c_str(), 1);
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execlp("sh", "sh", "-c", cmdline.c_str(), NULL);
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}
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}
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2012-01-14 15:02:54 +01:00
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void CommandManager::execute(const CommandParameters& params,
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2011-11-26 19:32:57 +01:00
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const Context& context)
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{
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2012-01-14 15:02:54 +01:00
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if (params.empty())
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return;
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2012-01-15 02:37:35 +01:00
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auto begin = params.begin();
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auto end = begin;
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while (true)
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{
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while (end != params.end() and *end != ";")
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++end;
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2011-11-26 19:32:57 +01:00
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2012-01-15 02:37:35 +01:00
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if (end != begin)
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{
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auto command_it = m_commands.find(*begin);
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if (command_it == m_commands.end())
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throw command_not_found(*begin);
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2012-01-15 04:02:08 +01:00
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if (command_it->second.flags & IgnoreSemiColons)
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end = params.end();
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2012-02-13 22:38:07 +01:00
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if (command_it->second.flags & DeferredShellEval)
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command_it->second.command(CommandParameters(begin + 1, end), context);
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else
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{
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std::vector<std::string> expanded_params;
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for (auto param = begin+1; param != end; ++param)
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{
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if (param->front() == '`' and param->back() == '`')
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shell_eval(expanded_params,
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param->substr(1, param->length() - 2),
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context);
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else
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expanded_params.push_back(*param);
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}
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command_it->second.command(expanded_params, context);
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}
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2012-01-15 02:37:35 +01:00
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}
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if (end == params.end())
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break;
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begin = end+1;
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end = begin;
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}
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2011-09-07 20:16:56 +02:00
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}
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2011-09-13 23:16:48 +02:00
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Completions CommandManager::complete(const std::string& command_line, size_t cursor_pos)
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{
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TokenList tokens = split(command_line);
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2011-11-26 20:05:49 +01:00
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size_t token_to_complete = tokens.size();
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2011-09-13 23:16:48 +02:00
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for (size_t i = 0; i < tokens.size(); ++i)
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{
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2011-10-19 20:50:28 +02:00
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if (tokens[i].first <= cursor_pos and tokens[i].second >= cursor_pos)
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2011-09-13 23:16:48 +02:00
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{
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token_to_complete = i;
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break;
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}
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}
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2011-10-19 20:50:28 +02:00
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if (token_to_complete == 0 or tokens.empty()) // command name completion
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2011-09-13 23:16:48 +02:00
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{
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2011-10-19 20:50:28 +02:00
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size_t cmd_start = tokens.empty() ? 0 : tokens[0].first;
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Completions result(cmd_start, cursor_pos);
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std::string prefix = command_line.substr(cmd_start,
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cursor_pos - cmd_start);
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2011-09-13 23:16:48 +02:00
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for (auto& command : m_commands)
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{
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if (command.first.substr(0, prefix.length()) == prefix)
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result.candidates.push_back(command.first);
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}
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return result;
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}
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2011-09-16 11:18:51 +02:00
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assert(not tokens.empty());
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std::string command_name =
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command_line.substr(tokens[0].first,
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tokens[0].second - tokens[0].first);
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auto command_it = m_commands.find(command_name);
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if (command_it == m_commands.end() or not command_it->second.completer)
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return Completions();
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2012-02-03 20:14:35 +01:00
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std::vector<std::string> params;
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2011-09-16 11:18:51 +02:00
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for (auto it = tokens.begin() + 1; it != tokens.end(); ++it)
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2011-09-14 17:41:56 +02:00
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{
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2011-09-16 11:18:51 +02:00
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params.push_back(command_line.substr(it->first,
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it->second - it->first));
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2011-09-14 17:41:56 +02:00
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}
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2011-11-26 20:05:49 +01:00
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size_t start = token_to_complete < tokens.size() ?
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tokens[token_to_complete].first : cursor_pos;
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Completions result(start , cursor_pos);
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size_t cursor_pos_in_token = cursor_pos - start;
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2011-09-16 11:18:51 +02:00
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result.candidates = command_it->second.completer(params,
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token_to_complete - 1,
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cursor_pos_in_token);
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return result;
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}
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CandidateList PerArgumentCommandCompleter::operator()(const CommandParameters& params,
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size_t token_to_complete,
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size_t pos_in_token) const
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{
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if (token_to_complete >= m_completers.size())
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return CandidateList();
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// it is possible to try to complete a new argument
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assert(token_to_complete <= params.size());
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const std::string& argument = token_to_complete < params.size() ?
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params[token_to_complete] : std::string();
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return m_completers[token_to_complete](argument, pos_in_token);
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2011-09-13 23:16:48 +02:00
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}
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2011-09-07 20:16:56 +02:00
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}
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