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/*
* Copyright (c) 2013-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Sluift/EditlineTerminal.h>
#include <cassert>
#include <cstring>
#include <iostream>
#include <vector>
#include <boost/numeric/conversion/cast.hpp>
#include <boost/optional.hpp>
#include <editline/readline.h>
#include <Swiften/Base/Platform.h>
#include <Sluift/Completer.h>
using namespace Swift;
static EditlineTerminal* globalInstance = nullptr;
static int completionStart = -1;
static int completionEnd = -1;
#if defined(SWIFTEN_PLATFORM_WINDOWS)
static char* getEmptyCompletions(const char*, int) {
#else
static int getEmptyCompletions(const char*, int) {
#endif
return 0;
}
static char* getCompletions(const char*, int state) {
rl_completion_append_character = 0;
#if RL_READLINE_VERSION >= 0x0600
rl_completion_suppress_append = 1;
#endif
static std::vector<std::string> completions;
if (state == 0) {
assert(globalInstance);
completions.clear();
if (globalInstance->getCompleter()) {
completions = globalInstance->getCompleter()->getCompletions(rl_line_buffer, completionStart, completionEnd);
}
}
if (boost::numeric_cast<size_t>(state) >= completions.size()) {
return nullptr;
}
return strdup(completions[boost::numeric_cast<size_t>(state)].c_str());
}
static char** getAttemptedCompletions(const char* text, int start, int end) {
completionStart = start;
completionEnd = end;
return rl_completion_matches(text, getCompletions);
}
EditlineTerminal& EditlineTerminal::getInstance() {
static EditlineTerminal instance;
globalInstance = &instance;
return instance;
}
EditlineTerminal::EditlineTerminal() {
rl_attempted_completion_function = getAttemptedCompletions;
rl_completion_entry_function = getEmptyCompletions; // Fallback. Do nothing.
#if defined(SWIFTEN_PLATFORM_WINDOWS)
// rl_basic_word_break is a cons char[] in MinGWEditLine.
// This one seems to work, although it doesn't on OS X for some reason.
rl_completer_word_break_characters = strdup(" \t\n.:+-*/><=;|&()[]{}");
#else
rl_basic_word_break_characters = strdup(" \t\n.:+-*/><=;|&()[]{}");
#endif
}
EditlineTerminal::~EditlineTerminal() {
}
void EditlineTerminal::printError(const std::string& message) {
std::cout << message << std::endl;
}
boost::optional<std::string> EditlineTerminal::readLine(const std::string& prompt) {
const char* line = readline(prompt.c_str());
return line ? std::string(line) : boost::optional<std::string>();
}
void EditlineTerminal::addToHistory(const std::string& line) {
#if defined(SWIFTEN_PLATFORM_WINDOWS)
// MinGWEditLine copies the string, so this is safe
add_history(const_cast<char*>(line.c_str()));
#else
add_history(line.c_str());
#endif
}
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Swift