mirror of
https://github.com/mpv-player/mpv
synced 2024-11-14 22:48:35 +01:00
cd25d98bfa
While this is perfectly OK on Unix, it causes annoying valgrind warnings, and might be otherwise confusing to others. On Windows, the runtime can actually abort the process if this is called. push.c part taken from a patch by Pedro Pombeiro.
497 lines
14 KiB
C
497 lines
14 KiB
C
/*
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* Based on GyS-TermIO v2.0 (for GySmail v3) (copyright (C) 1999 A'rpi/ESP-team)
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*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <pthread.h>
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#include <assert.h>
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#if HAVE_TERMIOS
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#if HAVE_TERMIOS_H
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#include <termios.h>
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#endif
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#if HAVE_SYS_TERMIOS_H
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#include <sys/termios.h>
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#endif
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#endif
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#include <unistd.h>
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#include <poll.h>
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#include "osdep/io.h"
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#include "osdep/threads.h"
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#include "common/common.h"
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#include "misc/bstr.h"
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#include "input/input.h"
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#include "input/keycodes.h"
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#include "misc/ctype.h"
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#include "terminal.h"
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#if HAVE_TERMIOS
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static volatile struct termios tio_orig;
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static volatile int tio_orig_set;
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#endif
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struct key_entry {
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const char *seq;
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int mpkey;
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// If this is not NULL, then if seq is matched as unique prefix, the
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// existing sequence is replaced by the following string. Matching
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// continues normally, and mpkey is or-ed into the final result.
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const char *replace;
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};
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static const struct key_entry keys[] = {
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{"\010", MP_KEY_BS},
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{"\011", MP_KEY_TAB},
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{"\012", MP_KEY_ENTER},
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{"\177", MP_KEY_BS},
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{"\033[1~", MP_KEY_HOME},
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{"\033[2~", MP_KEY_INS},
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{"\033[3~", MP_KEY_DEL},
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{"\033[4~", MP_KEY_END},
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{"\033[5~", MP_KEY_PGUP},
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{"\033[6~", MP_KEY_PGDWN},
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{"\033[7~", MP_KEY_HOME},
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{"\033[8~", MP_KEY_END},
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{"\033[11~", MP_KEY_F+1},
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{"\033[12~", MP_KEY_F+2},
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{"\033[13~", MP_KEY_F+3},
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{"\033[14~", MP_KEY_F+4},
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{"\033[15~", MP_KEY_F+5},
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{"\033[17~", MP_KEY_F+6},
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{"\033[18~", MP_KEY_F+7},
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{"\033[19~", MP_KEY_F+8},
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{"\033[20~", MP_KEY_F+9},
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{"\033[21~", MP_KEY_F+10},
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{"\033[23~", MP_KEY_F+11},
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{"\033[24~", MP_KEY_F+12},
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{"\033[A", MP_KEY_UP},
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{"\033[B", MP_KEY_DOWN},
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{"\033[C", MP_KEY_RIGHT},
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{"\033[D", MP_KEY_LEFT},
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{"\033[E", MP_KEY_KP5},
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{"\033[F", MP_KEY_END},
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{"\033[H", MP_KEY_HOME},
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{"\033[[A", MP_KEY_F+1},
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{"\033[[B", MP_KEY_F+2},
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{"\033[[C", MP_KEY_F+3},
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{"\033[[D", MP_KEY_F+4},
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{"\033[[E", MP_KEY_F+5},
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{"\033OE", MP_KEY_KP5}, // mintty?
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{"\033OM", MP_KEY_KPENTER},
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{"\033OP", MP_KEY_F+1},
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{"\033OQ", MP_KEY_F+2},
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{"\033OR", MP_KEY_F+3},
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{"\033OS", MP_KEY_F+4},
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{"\033Oa", MP_KEY_UP | MP_KEY_MODIFIER_CTRL}, // urxvt
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{"\033Ob", MP_KEY_DOWN | MP_KEY_MODIFIER_CTRL},
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{"\033Oc", MP_KEY_RIGHT | MP_KEY_MODIFIER_CTRL},
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{"\033Od", MP_KEY_LEFT | MP_KEY_MODIFIER_CTRL},
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{"\033Oj", '*'}, // also keypad, but we don't have separate codes for them
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{"\033Ok", '+'},
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{"\033Om", '-'},
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{"\033On", MP_KEY_KPDEC},
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{"\033Oo", '/'},
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{"\033Op", MP_KEY_KP0},
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{"\033Oq", MP_KEY_KP1},
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{"\033Or", MP_KEY_KP2},
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{"\033Os", MP_KEY_KP3},
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{"\033Ot", MP_KEY_KP4},
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{"\033Ou", MP_KEY_KP5},
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{"\033Ov", MP_KEY_KP6},
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{"\033Ow", MP_KEY_KP7},
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{"\033Ox", MP_KEY_KP8},
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{"\033Oy", MP_KEY_KP9},
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{"\033[a", MP_KEY_UP | MP_KEY_MODIFIER_SHIFT}, // urxvt
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{"\033[b", MP_KEY_DOWN | MP_KEY_MODIFIER_SHIFT},
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{"\033[c", MP_KEY_RIGHT | MP_KEY_MODIFIER_SHIFT},
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{"\033[d", MP_KEY_LEFT | MP_KEY_MODIFIER_SHIFT},
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{"\033[2^", MP_KEY_INS | MP_KEY_MODIFIER_CTRL},
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{"\033[3^", MP_KEY_DEL | MP_KEY_MODIFIER_CTRL},
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{"\033[5^", MP_KEY_PGUP | MP_KEY_MODIFIER_CTRL},
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{"\033[6^", MP_KEY_PGDWN | MP_KEY_MODIFIER_CTRL},
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{"\033[7^", MP_KEY_HOME | MP_KEY_MODIFIER_CTRL},
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{"\033[8^", MP_KEY_END | MP_KEY_MODIFIER_CTRL},
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{"\033[1;2", MP_KEY_MODIFIER_SHIFT, .replace = "\033["}, // xterm
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{"\033[1;3", MP_KEY_MODIFIER_ALT, .replace = "\033["},
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{"\033[1;5", MP_KEY_MODIFIER_CTRL, .replace = "\033["},
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{"\033[1;4", MP_KEY_MODIFIER_ALT | MP_KEY_MODIFIER_SHIFT, .replace = "\033["},
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{"\033[1;6", MP_KEY_MODIFIER_CTRL | MP_KEY_MODIFIER_SHIFT, .replace = "\033["},
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{"\033[1;7", MP_KEY_MODIFIER_CTRL | MP_KEY_MODIFIER_ALT, .replace = "\033["},
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{"\033[1;8",
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MP_KEY_MODIFIER_CTRL | MP_KEY_MODIFIER_ALT | MP_KEY_MODIFIER_SHIFT,
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.replace = "\033["},
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{"\033[29~", MP_KEY_MENU},
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{"\033[Z", MP_KEY_TAB | MP_KEY_MODIFIER_SHIFT},
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{0}
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};
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#define BUF_LEN 256
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struct termbuf {
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unsigned char b[BUF_LEN];
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int len;
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int mods;
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};
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static void skip_buf(struct termbuf *b, unsigned int count)
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{
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assert(count <= b->len);
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memmove(&b->b[0], &b->b[count], b->len - count);
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b->len -= count;
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b->mods = 0;
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}
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static struct termbuf buf;
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static bool getch2(struct input_ctx *input_ctx)
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{
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int retval = read(0, &buf.b[buf.len], BUF_LEN - buf.len);
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/* Return false on EOF to stop running select() on the FD, as it'd
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* trigger all the time. Note that it's possible to get temporary
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* EOF on terminal if the user presses ctrl-d, but that shouldn't
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* happen if the terminal state change done in terminal_init()
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* works.
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*/
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if (retval == 0)
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return false;
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if (retval == -1)
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return errno != EBADF && errno != EINVAL;
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buf.len += retval;
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while (buf.len) {
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int utf8_len = bstr_parse_utf8_code_length(buf.b[0]);
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if (utf8_len > 1) {
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if (buf.len < utf8_len)
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goto read_more;
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mp_input_put_key_utf8(input_ctx, buf.mods, (bstr){buf.b, utf8_len});
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skip_buf(&buf, utf8_len);
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continue;
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}
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const struct key_entry *match = NULL; // may be a partial match
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for (int n = 0; keys[n].seq; n++) {
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const struct key_entry *e = &keys[n];
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if (memcmp(e->seq, buf.b, MPMIN(buf.len, strlen(e->seq))) == 0) {
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if (match)
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goto read_more; /* need more bytes to disambiguate */
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match = e;
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}
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}
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if (!match) { // normal or unknown key
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if (buf.b[0] == '\033') {
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skip_buf(&buf, 1);
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if (buf.len > 0 && mp_isalnum(buf.b[0])) { // meta+normal key
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mp_input_put_key(input_ctx, buf.b[0] | MP_KEY_MODIFIER_ALT);
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skip_buf(&buf, 1);
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} else if (buf.len == 1 && buf.b[0] == '\033') {
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mp_input_put_key(input_ctx, MP_KEY_ESC);
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skip_buf(&buf, 1);
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} else {
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// Throw it away. Typically, this will be a complete,
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// unsupported sequence, and dropping this will skip it.
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skip_buf(&buf, buf.len);
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}
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} else {
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mp_input_put_key(input_ctx, buf.b[0]);
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skip_buf(&buf, 1);
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}
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continue;
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}
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int seq_len = strlen(match->seq);
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if (seq_len > buf.len)
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goto read_more; /* partial match */
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if (match->replace) {
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int rep = strlen(match->replace);
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assert(rep <= seq_len);
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memcpy(buf.b, match->replace, rep);
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memmove(buf.b + rep, buf.b + seq_len, buf.len - seq_len);
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buf.len = rep + buf.len - seq_len;
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buf.mods |= match->mpkey;
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continue;
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}
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mp_input_put_key(input_ctx, buf.mods | match->mpkey);
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skip_buf(&buf, seq_len);
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}
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read_more: /* need more bytes */
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return true;
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}
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static volatile int getch2_active = 0;
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static volatile int getch2_enabled = 0;
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static bool read_terminal;
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static void enable_kx(bool enable)
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{
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// This check is actually always true, as enable_kx calls are all guarded
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// by read_terminal, which is true only if both stdin and stdout are a
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// tty. Note that stderr being redirected away has no influence over mpv's
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// I/O handling except for disabling the terminal OSD, and thus stderr
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// shouldn't be relied on here either.
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if (isatty(STDOUT_FILENO)) {
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char *cmd = enable ? "\033=" : "\033>";
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(void)write(STDOUT_FILENO, cmd, strlen(cmd));
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}
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}
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static void do_activate_getch2(void)
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{
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if (getch2_active || !read_terminal)
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return;
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enable_kx(true);
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#if HAVE_TERMIOS
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struct termios tio_new;
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tcgetattr(0,&tio_new);
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if (!tio_orig_set) {
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tio_orig = tio_new;
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tio_orig_set = 1;
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}
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tio_new.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
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tio_new.c_cc[VMIN] = 1;
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tio_new.c_cc[VTIME] = 0;
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tcsetattr(0,TCSANOW,&tio_new);
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#endif
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getch2_active = 1;
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}
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static void do_deactivate_getch2(void)
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{
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if (!getch2_active)
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return;
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enable_kx(false);
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#if HAVE_TERMIOS
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if (tio_orig_set) {
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// once set, it will never be set again
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// so we can cast away volatile here
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tcsetattr(0, TCSANOW, (const struct termios *) &tio_orig);
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}
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#endif
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getch2_active = 0;
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}
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// sigaction wrapper
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static int setsigaction(int signo, void (*handler) (int),
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int flags, bool do_mask)
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{
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struct sigaction sa;
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sa.sa_handler = handler;
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if(do_mask)
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sigfillset(&sa.sa_mask);
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else
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = flags | SA_RESTART;
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return sigaction(signo, &sa, NULL);
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}
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static void getch2_poll(void)
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{
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if (!getch2_enabled)
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return;
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// check if stdin is in the foreground process group
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int newstatus = (tcgetpgrp(0) == getpgrp());
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// and activate getch2 if it is, deactivate otherwise
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if (newstatus)
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do_activate_getch2();
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else
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do_deactivate_getch2();
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}
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static void stop_sighandler(int signum)
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{
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do_deactivate_getch2();
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// note: for this signal, we use SA_RESETHAND but do NOT mask signals
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// so this will invoke the default handler
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raise(SIGTSTP);
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}
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static void continue_sighandler(int signum)
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{
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// SA_RESETHAND has reset SIGTSTP, so we need to restore it here
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setsigaction(SIGTSTP, stop_sighandler, SA_RESETHAND, false);
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getch2_poll();
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}
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static pthread_t input_thread;
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static struct input_ctx *input_ctx;
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static int death_pipe[2] = {-1, -1};
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static void close_death_pipe(void)
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{
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for (int n = 0; n < 2; n++) {
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if (death_pipe[n] >= 0)
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close(death_pipe[n]);
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death_pipe[n] = -1;
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}
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}
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static void quit_request_sighandler(int signum)
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{
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do_deactivate_getch2();
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(void)write(death_pipe[1], &(char){1}, 1);
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}
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static void *terminal_thread(void *ptr)
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{
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mpthread_set_name("terminal");
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bool stdin_ok = read_terminal; // if false, we still wait for SIGTERM
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while (1) {
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getch2_poll();
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struct pollfd fds[2] = {
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{.events = POLLIN, .fd = death_pipe[0]},
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{.events = POLLIN, .fd = STDIN_FILENO},
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};
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poll(fds, stdin_ok ? 2 : 1, -1);
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if (fds[0].revents)
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break;
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if (fds[1].revents)
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stdin_ok = getch2(input_ctx);
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}
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char c;
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bool quit = read(death_pipe[0], &c, 1) == 1 && c == 1;
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// Important if we received SIGTERM, rather than regular quit.
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if (quit) {
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struct mp_cmd *cmd = mp_input_parse_cmd(input_ctx, bstr0("quit 4"), "");
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if (cmd)
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mp_input_queue_cmd(input_ctx, cmd);
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}
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return NULL;
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}
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void terminal_setup_getch(struct input_ctx *ictx)
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{
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if (!getch2_enabled || input_ctx)
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return;
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if (mp_make_wakeup_pipe(death_pipe) < 0)
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return;
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// Disable reading from the terminal even if stdout is not a tty, to make
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// mpv ... | less
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// do the right thing.
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read_terminal = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO);
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input_ctx = ictx;
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if (pthread_create(&input_thread, NULL, terminal_thread, NULL)) {
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input_ctx = NULL;
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close_death_pipe();
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return;
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}
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setsigaction(SIGINT, quit_request_sighandler, SA_RESETHAND, false);
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setsigaction(SIGQUIT, quit_request_sighandler, SA_RESETHAND, false);
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setsigaction(SIGTERM, quit_request_sighandler, SA_RESETHAND, false);
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}
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void terminal_uninit(void)
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{
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if (!getch2_enabled)
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return;
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// restore signals
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setsigaction(SIGCONT, SIG_DFL, 0, false);
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setsigaction(SIGTSTP, SIG_DFL, 0, false);
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setsigaction(SIGINT, SIG_DFL, 0, false);
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setsigaction(SIGQUIT, SIG_DFL, 0, false);
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setsigaction(SIGTERM, SIG_DFL, 0, false);
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setsigaction(SIGTTIN, SIG_DFL, 0, false);
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setsigaction(SIGTTOU, SIG_DFL, 0, false);
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do_deactivate_getch2();
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if (input_ctx) {
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(void)write(death_pipe[1], &(char){0}, 1);
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pthread_join(input_thread, NULL);
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close_death_pipe();
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input_ctx = NULL;
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}
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getch2_enabled = 0;
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read_terminal = false;
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}
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bool terminal_in_background(void)
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{
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return read_terminal && tcgetpgrp(STDERR_FILENO) != getpgrp();
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}
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void terminal_get_size(int *w, int *h)
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{
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struct winsize ws;
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if (ioctl(0, TIOCGWINSZ, &ws) < 0 || !ws.ws_row || !ws.ws_col)
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return;
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*w = ws.ws_col;
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*h = ws.ws_row;
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}
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void terminal_init(void)
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{
|
|
assert(!getch2_enabled);
|
|
getch2_enabled = 1;
|
|
|
|
// handlers to fix terminal settings
|
|
setsigaction(SIGCONT, continue_sighandler, 0, true);
|
|
setsigaction(SIGTSTP, stop_sighandler, SA_RESETHAND, false);
|
|
setsigaction(SIGTTIN, SIG_IGN, 0, true);
|
|
setsigaction(SIGTTOU, SIG_IGN, 0, true);
|
|
|
|
getch2_poll();
|
|
}
|