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// Functions used for implementing the set_color builtin.
#include "config.h"
#if HAVE_NCURSES_H
#include <ncurses.h>
#elif HAVE_NCURSES_CURSES_H
#include <ncurses/curses.h>
#else
#include <curses.h>
#endif
#if HAVE_TERM_H
#include <term.h>
#elif HAVE_NCURSES_TERM_H
#include <ncurses/term.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <memory>
#include <string>
#include <vector>
#include "builtin.h"
#include "color.h"
#include "common.h"
#include "io.h"
#include "output.h"
#include "proc.h"
#include "wgetopt.h"
#include "wutil.h" // IWYU pragma: keep
class parser_t;
static void print_colors(io_streams_t &streams) {
const wcstring_list_t result = rgb_color_t::named_color_names();
size_t i;
for (i = 0; i < result.size(); i++) {
streams.out.append(result.at(i));
streams.out.push_back(L'\n');
}
}
static std::string builtin_set_color_output;
/// Function we set as the output writer.
static int set_color_builtin_outputter(char c) {
ASSERT_IS_MAIN_THREAD();
builtin_set_color_output.push_back(c);
return 0;
}
/// set_color builtin.
int builtin_set_color(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
wgetopter_t w;
// Variables used for parsing the argument list.
const struct woption long_options[] = {{L"background", required_argument, 0, 'b'},
{L"help", no_argument, 0, 'h'},
{L"bold", no_argument, 0, 'o'},
{L"underline", no_argument, 0, 'u'},
{L"version", no_argument, 0, 'v'},
{L"print-colors", no_argument, 0, 'c'},
{0, 0, 0, 0}};
const wchar_t *short_options = L"b:hvocu";
int argc = builtin_count_args(argv);
// Some code passes variables to set_color that don't exist, like $fish_user_whatever. As a
// hack, quietly return failure.
if (argc <= 1) {
return EXIT_FAILURE;
}
const wchar_t *bgcolor = NULL;
bool bold = false, underline = false;
int errret;
// Parse options to obtain the requested operation and the modifiers.
w.woptind = 0;
while (1) {
int c = w.wgetopt_long(argc, argv, short_options, long_options, 0);
if (c == -1) {
break;
}
switch (c) {
case 0: {
break;
}
case 'b': {
bgcolor = w.woptarg;
break;
}
case 'h': {
builtin_print_help(parser, streams, argv[0], streams.out);
return STATUS_BUILTIN_OK;
}
case 'o': {
bold = true;
break;
}
case 'u': {
underline = true;
break;
}
case 'c': {
print_colors(streams);
return STATUS_BUILTIN_OK;
}
case '?': {
return STATUS_BUILTIN_ERROR;
}
}
}
// Remaining arguments are foreground color.
std::vector<rgb_color_t> fgcolors;
for (; w.woptind < argc; w.woptind++) {
rgb_color_t fg = rgb_color_t(argv[w.woptind]);
if (fg.is_none()) {
streams.err.append_format(_(L"%ls: Unknown color '%ls'\n"), argv[0], argv[w.woptind]);
return STATUS_BUILTIN_ERROR;
}
fgcolors.push_back(fg);
}
if (fgcolors.empty() && bgcolor == NULL && !bold && !underline) {
streams.err.append_format(_(L"%ls: Expected an argument\n"), argv[0]);
return STATUS_BUILTIN_ERROR;
}
// #1323: We may have multiple foreground colors. Choose the best one. If we had no foreground
// color, we'll get none(); if we have at least one we expect not-none.
const rgb_color_t fg = best_color(fgcolors, output_get_color_support());
assert(fgcolors.empty() || !fg.is_none());
const rgb_color_t bg = rgb_color_t(bgcolor ? bgcolor : L"");
if (bgcolor && bg.is_none()) {
streams.err.append_format(_(L"%ls: Unknown color '%ls'\n"), argv[0], bgcolor);
return STATUS_BUILTIN_ERROR;
}
// Make sure that the term exists.
if (cur_term == NULL && setupterm(0, STDOUT_FILENO, &errret) == ERR) {
streams.err.append_format(_(L"%ls: Could not set up terminal\n"), argv[0]);
return STATUS_BUILTIN_ERROR;
}
// Test if we have at least basic support for setting fonts, colors and related bits - otherwise
// just give up...
if (!exit_attribute_mode) {
return STATUS_BUILTIN_ERROR;
}
// Save old output function so we can restore it.
int (*const saved_writer_func)(char) = output_get_writer();
// Set our output function, which writes to a std::string.
builtin_set_color_output.clear();
output_set_writer(set_color_builtin_outputter);
if (bold) {
if (enter_bold_mode) writembs(tparm(enter_bold_mode));
}
if (underline) {
if (enter_underline_mode) writembs(enter_underline_mode);
}
if (bgcolor != NULL) {
if (bg.is_normal()) {
write_color(rgb_color_t::black(), false /* not is_fg */);
writembs(tparm(exit_attribute_mode));
}
}
if (!fg.is_none()) {
if (fg.is_normal() || fg.is_reset()) {
write_color(rgb_color_t::black(), true /* is_fg */);
writembs(tparm(exit_attribute_mode));
} else {
write_color(fg, true /* is_fg */);
}
}
if (bgcolor != NULL) {
if (!bg.is_normal() && !bg.is_reset()) {
write_color(bg, false /* not is_fg */);
}
}
// Restore saved writer function.
output_set_writer(saved_writer_func);
// Output the collected string.
streams.out.append(str2wcstring(builtin_set_color_output));
builtin_set_color_output.clear();
return STATUS_BUILTIN_OK;
}
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