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/* $OpenBSD: input-keys.c,v 1.66 2019/11/18 09:42:09 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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"
/*
* This file is rather misleadingly named, it contains the code which takes a
* key code and translates it into something suitable to be sent to the
* application running in a pane (similar to input.c does in the other
* direction with output).
*/
static void input_key_mouse(struct window_pane *, struct mouse_event *);
struct input_key_ent {
key_code key;
const char *data;
int flags;
#define INPUTKEY_KEYPAD 0x1 /* keypad key */
#define INPUTKEY_CURSOR 0x2 /* cursor key */
};
static const struct input_key_ent input_keys[] = {
/* Paste keys. */
{ KEYC_PASTE_START, "\033[200~", 0 },
{ KEYC_PASTE_END, "\033[201~", 0 },
/* Function keys. */
{ KEYC_F1, "\033OP", 0 },
{ KEYC_F2, "\033OQ", 0 },
{ KEYC_F3, "\033OR", 0 },
{ KEYC_F4, "\033OS", 0 },
{ KEYC_F5, "\033[15~", 0 },
{ KEYC_F6, "\033[17~", 0 },
{ KEYC_F7, "\033[18~", 0 },
{ KEYC_F8, "\033[19~", 0 },
{ KEYC_F9, "\033[20~", 0 },
{ KEYC_F10, "\033[21~", 0 },
{ KEYC_F11, "\033[23~", 0 },
{ KEYC_F12, "\033[24~", 0 },
{ KEYC_F1|KEYC_SHIFT, "\033[25~", 0 },
{ KEYC_F2|KEYC_SHIFT, "\033[26~", 0 },
{ KEYC_F3|KEYC_SHIFT, "\033[28~", 0 },
{ KEYC_F4|KEYC_SHIFT, "\033[29~", 0 },
{ KEYC_F5|KEYC_SHIFT, "\033[31~", 0 },
{ KEYC_F6|KEYC_SHIFT, "\033[32~", 0 },
{ KEYC_F7|KEYC_SHIFT, "\033[33~", 0 },
{ KEYC_F8|KEYC_SHIFT, "\033[34~", 0 },
{ KEYC_IC, "\033[2~", 0 },
{ KEYC_DC, "\033[3~", 0 },
{ KEYC_HOME, "\033[1~", 0 },
{ KEYC_END, "\033[4~", 0 },
{ KEYC_NPAGE, "\033[6~", 0 },
{ KEYC_PPAGE, "\033[5~", 0 },
{ KEYC_BTAB, "\033[Z", 0 },
/*
* Arrow keys. Cursor versions must come first. The codes are toggled
* between CSI and SS3 versions when ctrl is pressed.
*/
{ KEYC_UP|KEYC_CTRL, "\033[A", INPUTKEY_CURSOR },
{ KEYC_DOWN|KEYC_CTRL, "\033[B", INPUTKEY_CURSOR },
{ KEYC_RIGHT|KEYC_CTRL, "\033[C", INPUTKEY_CURSOR },
{ KEYC_LEFT|KEYC_CTRL, "\033[D", INPUTKEY_CURSOR },
{ KEYC_UP, "\033OA", INPUTKEY_CURSOR },
{ KEYC_DOWN, "\033OB", INPUTKEY_CURSOR },
{ KEYC_RIGHT, "\033OC", INPUTKEY_CURSOR },
{ KEYC_LEFT, "\033OD", INPUTKEY_CURSOR },
{ KEYC_UP|KEYC_CTRL, "\033OA", 0 },
{ KEYC_DOWN|KEYC_CTRL, "\033OB", 0 },
{ KEYC_RIGHT|KEYC_CTRL, "\033OC", 0 },
{ KEYC_LEFT|KEYC_CTRL, "\033OD", 0 },
{ KEYC_UP, "\033[A", 0 },
{ KEYC_DOWN, "\033[B", 0 },
{ KEYC_RIGHT, "\033[C", 0 },
{ KEYC_LEFT, "\033[D", 0 },
/* Keypad keys. Keypad versions must come first. */
{ KEYC_KP_SLASH, "\033Oo", INPUTKEY_KEYPAD },
{ KEYC_KP_STAR, "\033Oj", INPUTKEY_KEYPAD },
{ KEYC_KP_MINUS, "\033Om", INPUTKEY_KEYPAD },
{ KEYC_KP_SEVEN, "\033Ow", INPUTKEY_KEYPAD },
{ KEYC_KP_EIGHT, "\033Ox", INPUTKEY_KEYPAD },
{ KEYC_KP_NINE, "\033Oy", INPUTKEY_KEYPAD },
{ KEYC_KP_PLUS, "\033Ok", INPUTKEY_KEYPAD },
{ KEYC_KP_FOUR, "\033Ot", INPUTKEY_KEYPAD },
{ KEYC_KP_FIVE, "\033Ou", INPUTKEY_KEYPAD },
{ KEYC_KP_SIX, "\033Ov", INPUTKEY_KEYPAD },
{ KEYC_KP_ONE, "\033Oq", INPUTKEY_KEYPAD },
{ KEYC_KP_TWO, "\033Or", INPUTKEY_KEYPAD },
{ KEYC_KP_THREE, "\033Os", INPUTKEY_KEYPAD },
{ KEYC_KP_ENTER, "\033OM", INPUTKEY_KEYPAD },
{ KEYC_KP_ZERO, "\033Op", INPUTKEY_KEYPAD },
{ KEYC_KP_PERIOD, "\033On", INPUTKEY_KEYPAD },
{ KEYC_KP_SLASH, "/", 0 },
{ KEYC_KP_STAR, "*", 0 },
{ KEYC_KP_MINUS, "-", 0 },
{ KEYC_KP_SEVEN, "7", 0 },
{ KEYC_KP_EIGHT, "8", 0 },
{ KEYC_KP_NINE, "9", 0 },
{ KEYC_KP_PLUS, "+", 0 },
{ KEYC_KP_FOUR, "4", 0 },
{ KEYC_KP_FIVE, "5", 0 },
{ KEYC_KP_SIX, "6", 0 },
{ KEYC_KP_ONE, "1", 0 },
{ KEYC_KP_TWO, "2", 0 },
{ KEYC_KP_THREE, "3", 0 },
{ KEYC_KP_ENTER, "\n", 0 },
{ KEYC_KP_ZERO, "0", 0 },
{ KEYC_KP_PERIOD, ".", 0 },
};
/* Split a character into two UTF-8 bytes. */
static size_t
input_split2(u_int c, u_char *dst)
{
if (c > 0x7f) {
dst[0] = (c >> 6) | 0xc0;
dst[1] = (c & 0x3f) | 0x80;
return (2);
}
dst[0] = c;
return (1);
}
/* Translate a key code into an output key sequence. */
void
input_key(struct window_pane *wp, key_code key, struct mouse_event *m)
{
const struct input_key_ent *ike;
u_int i;
size_t dlen;
char *out;
key_code justkey, newkey;
struct utf8_data ud;
log_debug("writing key 0x%llx (%s) to %%%u", key,
key_string_lookup_key(key), wp->id);
/* If this is a mouse key, pass off to mouse function. */
if (KEYC_IS_MOUSE(key)) {
if (m != NULL && m->wp != -1 && (u_int)m->wp == wp->id)
input_key_mouse(wp, m);
return;
}
/* Literal keys go as themselves (can't be more than eight bits). */
if (key & KEYC_LITERAL) {
ud.data[0] = (u_char)key;
bufferevent_write(wp->event, &ud.data[0], 1);
return;
}
/* Is this backspace? */
if ((key & KEYC_MASK_KEY) == KEYC_BSPACE) {
newkey = options_get_number(global_options, "backspace");
if (newkey >= 0x7f)
newkey = '\177';
key = newkey|(key & KEYC_MASK_MOD);
}
/*
* If this is a normal 7-bit key, just send it, with a leading escape
* if necessary. If it is a UTF-8 key, split it and send it.
*/
justkey = (key & ~(KEYC_XTERM|KEYC_ESCAPE));
if (justkey <= 0x7f) {
if (key & KEYC_ESCAPE)
bufferevent_write(wp->event, "\033", 1);
ud.data[0] = justkey;
bufferevent_write(wp->event, &ud.data[0], 1);
return;
}
if (justkey > 0x7f && justkey < KEYC_BASE) {
if (utf8_split(justkey, &ud) != UTF8_DONE)
return;
if (key & KEYC_ESCAPE)
bufferevent_write(wp->event, "\033", 1);
bufferevent_write(wp->event, ud.data, ud.size);
return;
}
/*
* Then try to look this up as an xterm key, if the flag to output them
* is set.
*/
if (options_get_number(wp->window->options, "xterm-keys")) {
if ((out = xterm_keys_lookup(key)) != NULL) {
bufferevent_write(wp->event, out, strlen(out));
free(out);
return;
}
}
key &= ~KEYC_XTERM;
/* Otherwise look the key up in the table. */
for (i = 0; i < nitems(input_keys); i++) {
ike = &input_keys[i];
if ((ike->flags & INPUTKEY_KEYPAD) &&
!(wp->screen->mode & MODE_KKEYPAD))
continue;
if ((ike->flags & INPUTKEY_CURSOR) &&
!(wp->screen->mode & MODE_KCURSOR))
continue;
if ((key & KEYC_ESCAPE) && (ike->key | KEYC_ESCAPE) == key)
break;
if (ike->key == key)
break;
}
if (i == nitems(input_keys)) {
log_debug("key 0x%llx missing", key);
return;
}
dlen = strlen(ike->data);
log_debug("found key 0x%llx: \"%s\"", key, ike->data);
/* Prefix a \033 for escape. */
if (key & KEYC_ESCAPE)
bufferevent_write(wp->event, "\033", 1);
bufferevent_write(wp->event, ike->data, dlen);
}
/* Translate mouse and output. */
static void
input_key_mouse(struct window_pane *wp, struct mouse_event *m)
{
struct screen *s = wp->screen;
int mode = s->mode;
char buf[40];
size_t len;
u_int x, y;
if ((mode & ALL_MOUSE_MODES) == 0)
return;
if (cmd_mouse_at(wp, m, &x, &y, 0) != 0)
return;
if (!window_pane_visible(wp))
return;
/* If this pane is not in button or all mode, discard motion events. */
if (MOUSE_DRAG(m->b) &&
(mode & (MODE_MOUSE_BUTTON|MODE_MOUSE_ALL)) == 0)
return;
/*
* If this event is a release event and not in all mode, discard it.
* In SGR mode we can tell absolutely because a release is normally
* shown by the last character. Without SGR, we check if the last
* buttons was also a release.
*/
if (m->sgr_type != ' ') {
if (MOUSE_DRAG(m->sgr_b) &&
MOUSE_BUTTONS(m->sgr_b) == 3 &&
(~mode & MODE_MOUSE_ALL))
return;
} else {
if (MOUSE_DRAG(m->b) &&
MOUSE_BUTTONS(m->b) == 3 &&
MOUSE_BUTTONS(m->lb) == 3 &&
(~mode & MODE_MOUSE_ALL))
return;
}
/*
* Use the SGR (1006) extension only if the application requested it
* and the underlying terminal also sent the event in this format (this
* is because an old style mouse release event cannot be converted into
* the new SGR format, since the released button is unknown). Otherwise
* pretend that tmux doesn't speak this extension, and fall back to the
* UTF-8 (1005) extension if the application requested, or to the
* legacy format.
*/
if (m->sgr_type != ' ' && (s->mode & MODE_MOUSE_SGR)) {
len = xsnprintf(buf, sizeof buf, "\033[<%u;%u;%u%c",
m->sgr_b, x + 1, y + 1, m->sgr_type);
} else if (s->mode & MODE_MOUSE_UTF8) {
if (m->b > 0x7ff - 32 || x > 0x7ff - 33 || y > 0x7ff - 33)
return;
len = xsnprintf(buf, sizeof buf, "\033[M");
len += input_split2(m->b + 32, &buf[len]);
len += input_split2(x + 33, &buf[len]);
len += input_split2(y + 33, &buf[len]);
} else {
if (m->b > 223)
return;
len = xsnprintf(buf, sizeof buf, "\033[M");
buf[len++] = m->b + 32;
buf[len++] = x + 33;
buf[len++] = y + 33;
}
log_debug("writing mouse %.*s to %%%u", (int)len, buf, wp->id);
bufferevent_write(wp->event, buf, len);
}
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