fish-shell/builtin_set_color.cpp

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/** \file builtin_set_color.cpp Functions defining the set_color builtin
Functions used for implementing the set_color builtin.
*/
#include "config.h"
#include "builtin.h"
#include "color.h"
#include "output.h"
#if HAVE_NCURSES_H
#include <ncurses.h>
#else
#include <curses.h>
#endif
#if HAVE_TERM_H
#include <term.h>
#elif HAVE_NCURSES_TERM_H
#include <ncurses/term.h>
#endif
/* We know about these buffers */
extern wcstring stdout_buffer, stderr_buffer;
/**
Error message for invalid path operations
*/
#define BUILTIN_SET_PATH_ERROR L"%ls: Warning: path component %ls may not be valid in %ls.\n"
/**
Hint for invalid path operation with a colon
*/
#define BUILTIN_SET_PATH_HINT L"%ls: Did you mean 'set %ls $%ls %ls'?\n"
/**
Error for mismatch between index count and elements
*/
#define BUILTIN_SET_ARG_COUNT L"%ls: The number of variable indexes does not match the number of values\n"
static void print_colors(void)
{
const wcstring_list_t result = rgb_color_t::named_color_names();
size_t i;
for (i=0; i < result.size(); i++)
{
stdout_buffer.append(result.at(i));
stdout_buffer.push_back(L'\n');
}
}
/* function we set as the output writer */
static std::string builtin_set_color_output;
static int set_color_builtin_outputter(char c)
{
ASSERT_IS_MAIN_THREAD();
builtin_set_color_output.push_back(c);
return 0;
}
/**
set_color builtin
*/
static int builtin_set_color(parser_t &parser, wchar_t **argv)
{
/** 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);
const wchar_t *bgcolor = NULL;
bool bold = false, underline=false;
/* Parse options to obtain the requested operation and the modifiers */
woptind = 0;
while (1)
{
int c = wgetopt_long(argc, argv, short_options, long_options, 0);
if (c == -1)
{
break;
}
switch (c)
{
case 0:
break;
case 'b':
bgcolor = woptarg;
break;
case 'h':
builtin_print_help(parser, argv[0], stdout_buffer);
return STATUS_BUILTIN_OK;
case 'o':
bold = true;
break;
case 'u':
underline = true;
break;
case 'c':
print_colors();
return STATUS_BUILTIN_OK;
case '?':
return STATUS_BUILTIN_ERROR;
}
}
/* Remaining argument is foreground color */
const wchar_t *fgcolor = NULL;
if (woptind < argc)
{
if (woptind + 1 == argc)
{
fgcolor = argv[woptind];
}
else
{
append_format(stderr_buffer,
_(L"%ls: Too many arguments\n"),
argv[0]);
return STATUS_BUILTIN_ERROR;
}
}
if (fgcolor == NULL && bgcolor == NULL && !bold && !underline)
{
append_format(stderr_buffer,
_(L"%ls: Expected an argument\n"),
argv[0]);
return STATUS_BUILTIN_ERROR;
}
const rgb_color_t fg = rgb_color_t(fgcolor ? fgcolor : L"");
if (fgcolor && fg.is_none())
{
append_format(stderr_buffer, _(L"%ls: Unknown color '%ls'\n"), argv[0], fgcolor);
return STATUS_BUILTIN_ERROR;
}
const rgb_color_t bg = rgb_color_t(bgcolor ? bgcolor : L"");
if (bgcolor && bg.is_none())
{
append_format(stderr_buffer, _(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, 0) == ERR)
{
append_format(stderr_buffer, _(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_background_color(0);
writembs(tparm(exit_attribute_mode));
}
}
if (fgcolor != NULL)
{
if (fg.is_normal())
{
write_foreground_color(0);
writembs(tparm(exit_attribute_mode));
}
else
{
write_foreground_color(index_for_color(fg));
}
}
if (bgcolor != NULL)
{
if (! bg.is_normal())
{
write_background_color(index_for_color(bg));
}
}
/* Restore saved writer function */
output_set_writer(saved_writer_func);
/* Output the collected string */
std::string local_output;
std::swap(builtin_set_color_output, local_output);
stdout_buffer.append(str2wcstring(local_output));
return STATUS_BUILTIN_OK;
}