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// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2021 Evan Welsh <contact@evanwelsh.com>
#include <config.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#elif defined(_WIN32)
# include <io.h>
#endif
#ifdef HAVE_READLINE_READLINE_H
# include <readline/history.h>
#endif
#include <glib.h>
#include "gjs/auto.h"
#include "util/console.h"
/**
* ANSI escape code sequences to manipulate terminals.
*
* See
* https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_(Control_Sequence_Introducer)_sequences
*/
namespace ANSICode {
/**
* ANSI escape code sequence to clear the terminal screen.
*
* Combination of 0x1B (Escape) and the sequence nJ where n=2,
* n=2 clears the entire display instead of only after the cursor.
*/
constexpr const char CLEAR_SCREEN[] = "\x1b[2J";
} // namespace ANSICode
#ifdef HAVE_UNISTD_H
const int stdin_fd = STDIN_FILENO;
const int stdout_fd = STDOUT_FILENO;
const int stderr_fd = STDERR_FILENO;
#elif defined(_WIN32)
const int stdin_fd = _fileno(stdin);
const int stdout_fd = _fileno(stdout);
const int stderr_fd = _fileno(stderr);
#else
const int stdin_fd = 0;
const int stdout_fd = 1;
const int stderr_fd = 2;
#endif
bool gjs_console_is_tty(int fd) {
#ifdef HAVE_UNISTD_H
return isatty(fd);
#elif defined(_WIN32)
return _isatty(fd);
#else
return false;
#endif
}
bool gjs_console_clear() {
if (stdout_fd < 0 || !g_log_writer_supports_color(stdout_fd))
return false;
return fputs(ANSICode::CLEAR_SCREEN, stdout) > 0 && fflush(stdout) > 0;
}
#ifdef HAVE_READLINE_READLINE_H
char* gjs_console_get_repl_history_path() {
const char* user_history_path = g_getenv("GJS_REPL_HISTORY");
Gjs::AutoChar default_history_path =
g_build_filename(g_get_user_cache_dir(), "gjs_repl_history", nullptr);
bool is_write_history_disabled =
user_history_path && user_history_path[0] == '\0';
if (is_write_history_disabled)
return nullptr;
if (user_history_path)
return g_strdup(user_history_path);
return default_history_path.release();
}
void gjs_console_write_repl_history(const char* path) {
if (path) {
int err = write_history(path);
if (err != 0)
g_warning("Could not persist history to defined file %s: %s", path,
g_strerror(err));
}
}
#endif
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