cosmopolitan/dsp/tty/hidecursor.c

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2020-06-15 14:18:57 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "dsp/tty/tty.h"
#include "libc/bits/pushpop.h"
#include "libc/dce.h"
#include "libc/log/log.h"
#include "libc/nt/console.h"
#include "libc/nt/runtime.h"
#include "libc/nt/struct/consolecursorinfo.h"
static int ttysetcursor(int fd, bool visible) {
struct NtConsoleCursorInfo ntcursor;
char code[8] = "\e[?25l";
if (isterminalinarticulate()) return 0;
if (visible) code[5] = 'h';
if (SupportsWindows()) {
GetConsoleCursorInfo(GetStdHandle(kNtStdOutputHandle), &ntcursor);
ntcursor.bVisible = visible;
SetConsoleCursorInfo(GetStdHandle(kNtStdOutputHandle), &ntcursor);
}
return ttysend(fd, code);
}
/**
* Asks teletypewriter to hide blinking box.
*/
int ttyhidecursor(int fd) {
return ttysetcursor(fd, false);
}
/**
* Asks teletypewriter to restore blinking box.
*/
int ttyshowcursor(int fd) {
return ttysetcursor(fd, true);
}