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/* $Id: input.c,v 1.3 2007-08-27 11:05:21 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
size_t input_sequence(
u_char *, size_t, u_char *, u_char *, uint16_t **, u_int *);
int input_control(
u_char **, size_t *, struct buffer *, struct screen *, u_char);
int input_pair_private(
u_char **, size_t *, struct buffer *, struct screen *, u_char);
int input_pair_standard(
u_char **, size_t *, struct buffer *, struct screen *, u_char);
int input_pair_control(
u_char **, size_t *, struct buffer *, struct screen *, u_char);
int input_control_sequence(
u_char **, size_t *, struct buffer *, struct screen *);
int input_check_one(uint16_t *, u_int, uint16_t *, uint16_t);
int input_check_one2(
uint16_t *, u_int, uint16_t *, uint16_t, uint16_t, uint16_t);
int input_check_two(
uint16_t *, u_int, uint16_t *, uint16_t, uint16_t *, uint16_t);
struct input_key {
int key;
const char *string;
};
struct input_key input_keys[] = {
{ KEYC_BACKSPACE, "" },
{ KEYC_DC, "[3~" },
{ KEYC_DOWN, "OB" },
{ KEYC_F1, "OP" },
{ KEYC_F10, "[21~" },
{ KEYC_F11, "[23~" },
{ KEYC_F12, "[24~" },
{ KEYC_F2, "OQ" },
{ KEYC_F3, "OR" },
{ KEYC_F4, "OS" },
{ KEYC_F5, "[15~" },
{ KEYC_F6, "[17~" },
{ KEYC_F7, "[18~" },
{ KEYC_F8, "[19~" },
{ KEYC_F9, "[20~" },
{ KEYC_HOME, "[1~" },
{ KEYC_IC, "[2~" },
{ KEYC_LEFT, "OD" },
{ KEYC_LL, "[4~" },
{ KEYC_NPAGE, "[6~" },
{ KEYC_PPAGE, "[5~" },
{ KEYC_RIGHT, "OC" },
{ KEYC_UP, "OA" }
};
/*
* This parses CSI escape sequences into a code and a block of uint16_t
* arguments. buf must be the next byte after the \e[ and len the remaining
* data.
*/
size_t
input_sequence(u_char *buf, size_t len,
u_char *code, u_char *private, uint16_t **argv, u_int *argc)
{
char ch;
u_char *ptr, *saved;
const char *errstr;
*code = 0;
*argc = 0;
*argv = NULL;
if (len == 0)
return (0);
saved = buf;
/*
* 0x3c (<) to 0x3f (?) mark private sequences when appear as the first
* character.
*/
*private = '\0';
if (*buf >= '<' && *buf <= '?') {
*private = *buf;
buf++; len--;
} else if (*buf < '0' || *buf > ';')
goto complete;
while (len > 0) {
/*
* Every parameter substring is bytes from 0x30 (0) to 0x3a (:),
* terminated by 0x3b (;). 0x3a is an internal seperator.
*/
/* Find the end of the substring. */
ptr = buf;
while (len != 0 && *ptr >= '0' && *ptr <= '9') {
ptr++;
len--;
}
if (len == 0)
break;
/* An 0x3a is unsupported. */
if (*ptr == ':')
goto invalid;
/* Create a new argument. */
(*argc)++;
*argv = xrealloc(*argv, *argc, sizeof **argv);
/* Fill in argument value. */
errstr = NULL;
if (ptr == buf)
(*argv)[*argc - 1] = UINT16_MAX;
else {
ch = *ptr; *ptr = '\0';
(*argv)[*argc - 1] =
strtonum(buf, 0, UINT16_MAX - 1, &errstr);
*ptr = ch;
}
buf = ptr;
/* If the conversion had errors, abort now. */
if (errstr != NULL)
goto invalid;
/* Break for any non-terminator. */
if (*buf != ';')
goto complete;
buf++; len--;
}
if (len == 0)
goto incomplete;
complete:
/* Valid final characters are 0x40 (@) to 0x7e (~). */
if (*buf < '@' || *buf > '~')
goto invalid;
*code = *buf;
return (buf - saved + 1);
invalid:
if (*argv != NULL) {
xfree(*argv);
*argv = NULL;
}
*argc = 0;
/* Invalid. Consume until a valid terminator. */
while (len > 0) {
if (*buf >= '@' && *buf <= '~')
break;
buf++; len--;
}
if (len == 0)
goto incomplete;
*code = '\0';
return (buf - saved + 1);
incomplete:
if (*argv != NULL) {
xfree(*argv);
*argv = NULL;
}
*argc = 0;
*code = '\0';
return (0);
}
/* Translate a key code into an output key sequence. */
void
input_key(struct buffer *b, int key)
{
struct input_key *ak;
u_int i;
log_debug("writing key %d", key);
if (key != KEYC_NONE && key >= 0) {
input_store8(b, key);
return;
}
for (i = 0; i < (sizeof input_keys / sizeof input_keys[0]); i++) {
ak = input_keys + i;
if (ak->key == key) {
log_debug("found key %d: \"%s\"", key, ak->string);
buffer_write(b, ak->string, strlen(ak->string));
return;
}
}
}
/*
* Parse a block of data and normalise escape sequences into a \e, a single
* character code and the correct number of arguments. This includes adding
* missing arguments and default values, and enforcing limits. Returns the
* number of bytes consumed. The screen is updated with the data and used
* to fill in current cursor positions and sizes.
*/
size_t
input_parse(u_char *buf, size_t len, struct buffer *b, struct screen *s)
{
u_char *saved, ch;
size_t size;
FILE *f;
saved = buf;
if (debug_level > 1) {
f = fopen("tmux-in.log", "a+");
fwrite(buf, len, 1, f);
fclose(f);
}
while (len > 0) {
ch = *buf++; len--;
/* Handle control characters. */
if (ch != '\e') {
if (ch < ' ') {
if (input_control(&buf, &len, b, s, ch) == 1) {
*--buf = ch;
break;
}
} else {
log_debug("character: %c (%hhu)", ch, ch);
screen_character(s, ch);
input_store8(b, ch);
}
continue;
}
if (len == 0) {
*--buf = '\e';
break;
}
/* Read the first character. */
ch = *buf++; len--;
/* Ignore delete. */
if (ch == '\177') {
if (len == 0) {
*--buf = '\e';
break;
}
ch = *buf++; len--;
}
/* Interpret C0 immediately. */
if (ch < ' ') {
if (input_control(&buf, &len, b, s, ch) == 1) {
*--buf = ch;
break;
}
if (len == 0) {
*--buf = '\e';
break;
}
ch = *buf++; len--;
}
/*
* Save used size to work out how much to pass to
* screen_sequence later.
*/
size = BUFFER_USED(b);
/* Skip until the end of intermediate strings. */
if (ch >= ' ' && ch <= '/') {
while (len != 0) {
if (ch >= 0x30 && ch <= 0x3f)
break;
if (ch >= 0x40 && ch <= 0x5f)
break;
ch = *buf++; len--;
}
continue;
}
/* Handle two-character sequences. */
if (ch >= '0' && ch <= '?') {
if (input_pair_private(&buf, &len, b, s, ch) == 1)
goto incomplete;
goto next;
}
if (ch >= '`' && ch <= '~') {
if (input_pair_standard(&buf, &len, b, s, ch) == 1)
goto incomplete;
goto next;
}
if (ch >= '@' && ch <= '_' && ch != '[') {
if (input_pair_control(&buf, &len, b, s, ch) == 1)
goto incomplete;
goto next;
}
/* If not CSI at this point, invalid. */
if (ch != '[')
continue;
if (input_control_sequence(&buf, &len, b, s) == 1)
goto incomplete;
next:
size = BUFFER_USED(b) - size;
log_debug("output is %zu bytes", size);
if (size > 0) /* XXX only one command? */
screen_sequence(s, BUFFER_IN(b) - size);
log_debug("remaining data %zu bytes", len);
}
return (buf - saved);
incomplete:
*--buf = ch;
*--buf = '\e';
return (buf - saved);
}
/* Handle single control characters. */
int
input_control(unused u_char **buf, unused size_t *len,
struct buffer *b, struct screen *s, u_char ch)
{
switch (ch) {
case '\0': /* NUL */
break;
case '\n': /* LF */
case '\r': /* CR */
case '\010': /* BS */
log_debug("control: %hhu", ch);
screen_character(s, ch);
input_store8(b, ch);
break;
default:
log_debug("unknown control: %c (%hhu)", ch, ch);
break;
}
return (0);
}
/* Translate a private two-character sequence. */
int
input_pair_private(unused u_char **buf, unused size_t *len,
unused struct buffer *b, unused struct screen *s, unused u_char ch)
{
log_debug("private2: %c (%hhu)", ch, ch);
switch (ch) {
case '=': /* DECKPAM */
input_store_zero(b, CODE_KKEYPADON);
break;
case '>': /* DECKPNM*/
input_store_zero(b, CODE_KKEYPADOFF);
break;
default:
log_debug("unknown private2: %c (%hhu)", ch, ch);
break;
}
return (0);
}
/* Translate a standard two-character sequence. */
int
input_pair_standard(unused u_char **buf, unused size_t *len,
unused struct buffer *b, unused struct screen *s, u_char ch)
{
log_debug("unknown standard2: %c (%hhu)", ch, ch);
return (0);
}
/* Translate a control two-character sequence. */
int
input_pair_control(u_char **buf, size_t *len,
struct buffer *b, unused struct screen *s, u_char ch)
{
u_char *ptr;
size_t size;
log_debug("control2: %c (%hhu)", ch, ch);
switch (ch) {
case ']': /* window title */
if (*len < 3)
return (1);
ch = *(*buf)++; (*len)--;
/*
* Search MAXTITLELEN + 1 to allow space for the ;. The
* \007 is also included, but space is needed for a \0 so
* it doesn't need to be compensated for.
*/
size = *len > MAXTITLELEN + 1 ? MAXTITLELEN + 1 : *len;
if ((ptr = memchr(*buf, '\007', size)) == NULL) {
log_debug("title not found in %zu bytes", size);
if (*len >= MAXTITLELEN + 1)
break;
(*buf)--; (*len)++;
return (1);
}
size = ptr - *buf;
/* A zero size means no ;, just skip the \007 and return. */
if (size == 0) {
(*buf)++; (*len)--;
break;
}
/* Set the title if appropriate. */
if (**buf == ';' && (ch == '0' || ch == '1')) {
log_debug("title found, length %zu bytes: %.*s",
size - 1, (int) size - 1, *buf + 1);
if (size > 1) {
input_store_one(b, CODE_TITLE, size - 1);
buffer_write(b, *buf + 1, size - 1);
}
}
/* Skip the title; add one for the \007. */
(*buf) += size + 1;
(*len) -= size + 1;
break;
case 'M': /* RI */
input_store_one(b, CODE_CURSORUPSCROLL, 1);
break;
default:
log_debug("unknown control2: %c (%hhu)", ch, ch);
break;
}
return (0);
}
/* Translate a control sequence. */
int
input_control_sequence(
u_char **buf, size_t *len, struct buffer *b, struct screen *s)
{
u_char code, private;
size_t used;
uint16_t *argv, ua, ub;
u_int argc, i;
used = input_sequence(*buf, *len, &code, &private, &argv, &argc);
if (used == 0) /* incomplete */
return (1);
(*buf) += used;
(*len) -= used;
if (code == '\0') /* invalid */
return (-1);
log_debug(
"sequence: %c (%hhu) [%c] [cx %u, cy %u, sx %u, sy %u]: %u", code,
code, private, s->cx, s->cy, s->sx, s->sy, argc);
for (i = 0; i < argc; i++)
log_debug("\targument %u: %u", i, argv[i]);
switch (code) {
case 'A': /* CUU */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_CURSORUP, ua);
break;
case 'B': /* CUD */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_CURSORDOWN, ua);
break;
case 'C': /* CUF */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_CURSORRIGHT, ua);
break;
case 'D': /* CUB */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_CURSORLEFT, ua);
break;
case 'P': /* DCH */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_DELETECHARACTER, ua);
break;
case 'M': /* DL */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_DELETELINE, ua);
break;
case '@': /* ICH */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_INSERTCHARACTER, ua);
break;
case 'L': /* IL */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_one(b, CODE_INSERTLINE, ua);
break;
case 'd': /* VPA */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_two(b, CODE_CURSORMOVE, ua, s->cx + 1);
break;
case 'G': /* HPA */
if (private != '\0')
break;
if (input_check_one(argv, argc, &ua, 1) != 0)
break;
if (ua == 0)
break;
input_store_two(b, CODE_CURSORMOVE, s->cy + 1, ua);
break;
case 'H': /* CUP */
case 'f': /* HVP */
if (private != '\0')
break;
if (input_check_two(argv, argc, &ua, 1, &ub, 1) != 0)
break;
if (ua == 0 || ub == 0)
break;
input_store_two(b, CODE_CURSORMOVE, ua, ub);
break;
case 'J': /* ED */
if (private != '\0')
break;
if (input_check_one2(argv, argc, &ua, 0, 0, 2) != 0)
break;
switch (ua) {
case 0:
input_store_zero(b, CODE_CLEARENDOFSCREEN);
break;
case 2:
input_store_zero(b, CODE_CLEARSCREEN);
break;
}
break;
case 'K': /* EL */
if (private != '\0')
break;
if (input_check_one2(argv, argc, &ua, 0, 0, 2) != 0)
break;
switch (ua) {
case 0:
input_store_zero(b, CODE_CLEARENDOFLINE);
break;
case 1:
input_store_zero(b, CODE_CLEARSTARTOFLINE);
break;
case 2:
input_store_zero(b, CODE_CLEARLINE);
break;
}
break;
case 'h': /* SM */
if (input_check_one(argv, argc, &ua, 0) != 0)
break;
switch (private) {
case '?':
switch (ua) {
case 1: /* GATM */
input_store_zero(b, CODE_KCURSORON);
break;
case 25: /* TCEM */
input_store_zero(b, CODE_CURSORON);
break;
default:
log_debug("unknown SM [%d]: %u", private, ua);
}
break;
case '\0':
switch (ua) {
case 4: /* IRM */
input_store_zero(b, CODE_INSERTON);
break;
case 34:
/* Cursor high visibility not supported. */
break;
default:
log_debug("unknown SM [%d]: %u", private, ua);
break;
}
break;
}
break;
case 'l': /* RM */
if (input_check_one(argv, argc, &ua, 0) != 0)
break;
switch (private) {
case '?':
switch (ua) {
case 1: /* GATM */
input_store_zero(b, CODE_KCURSOROFF);
break;
case 25: /* TCEM */
input_store_zero(b, CODE_CURSOROFF);
break;
default:
log_debug("unknown RM [%d]: %u", private, ua);
}
break;
case '\0':
switch (ua) {
case 4: /* IRM */
input_store_zero(b, CODE_INSERTOFF);
break;
case 34:
/* Cursor high visibility not supported. */
break;
default:
log_debug("unknown RM [%d]: %u", private, ua);
break;
}
break;
}
break;
case 'r': /* DECSTBM */
if (private != '\0')
break;
if (input_check_two(argv, argc,
&ua, s->ry_upper + 1, &ub, s->ry_lower + 1) != 0)
break;
if (ua == 0 || ub == 0 || ub < ua)
break;
input_store_two(b, CODE_SCROLLREGION, ua, ub);
break;
case 'm': /* SGR */
input_store_zero(b, CODE_ATTRIBUTES);
if (argc == 0) {
input_store16(b, 1);
input_store16(b, 0);
} else {
input_store16(b, argc);
for (i = 0; i < argc; i++) {
if (argv[i] == UINT16_MAX)
argv[i] = 0;
input_store16(b, argv[i]);
}
}
break;
default:
log_debug("unknown sequence: %c (%hhu)", code, code);
break;
}
if (argv != NULL) {
xfree(argv);
argv = NULL;
}
return (0);
}
/* Check for one argument. */
int
input_check_one(uint16_t *argv, u_int argc, uint16_t *a, uint16_t ad)
{
*a = ad;
if (argc == 1) {
if (argv[0] != UINT16_MAX)
*a = argv[0];
} else if (argc != 0)
return (-1);
return (0);
}
/* Check for one argument with limits. */
int
input_check_one2(uint16_t *argv, u_int argc,
uint16_t *a, uint16_t ad, uint16_t al, uint16_t au)
{
*a = ad;
if (argc == 1) {
if (argv[0] != UINT16_MAX)
*a = argv[0];
} else if (argc != 0)
return (-1);
if (*a < al || *a > au)
return (-1);
return (0);
}
/* Check for two arguments. */
int
input_check_two(uint16_t *argv, u_int argc,
uint16_t *a, uint16_t ad, uint16_t *b, uint16_t bd)
{
*a = ad;
*b = bd;
if (argc == 1) {
if (argv[0] != UINT16_MAX)
*a = argv[0];
} else if (argc == 2) {
if (argv[0] != UINT16_MAX)
*a = argv[0];
if (argv[1] != UINT16_MAX)
*b = argv[1];
} else if (argc != 0)
return (-1);
return (0);
}
/* Store a code without arguments. */
void
input_store_zero(struct buffer *b, u_char code)
{
input_store8(b, '\e');
input_store8(b, code);
}
/* Store a code with a single argument. */
void
input_store_one(struct buffer *b, u_char code, uint16_t ua)
{
input_store8(b, '\e');
input_store8(b, code);
input_store16(b, ua);
}
/* Store a code with two arguments. */
void
input_store_two(struct buffer *b, u_char code, uint16_t ua, uint16_t ub)
{
input_store8(b, '\e');
input_store8(b, code);
input_store16(b, ua);
input_store16(b, ub);
}
/* Write an 8-bit quantity to a buffer. */
void
input_store8(struct buffer *b, uint8_t n)
{
buffer_write(b, &n, sizeof n);
}
/* Write a 16-bit argument to a buffer. */
void
input_store16(struct buffer *b, uint16_t n)
{
buffer_write(b, &n, sizeof n);
}
/* Extract an 8-bit quantity from a buffer. */
uint8_t
input_extract8(struct buffer *b)
{
uint8_t n;
buffer_read(b, &n, sizeof n);
return (n);
}
/* Extract a 16-bit argument from a pointer. */
uint16_t
input_extract16(struct buffer *b)
{
uint16_t n;
buffer_read(b, &n, sizeof n);
return (n);
}