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tmux/input-keys.c

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/* $OpenBSD$ */
/*
* 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 <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 *);
/* Entry in the key tree. */
struct input_key_entry {
key_code key;
const char *data;
RB_ENTRY(input_key_entry) entry;
};
RB_HEAD(input_key_tree, input_key_entry);
/* Tree of input keys. */
static int input_key_cmp(struct input_key_entry *,
struct input_key_entry *);
RB_GENERATE_STATIC(input_key_tree, input_key_entry, entry, input_key_cmp);
struct input_key_tree input_key_tree = RB_INITIALIZER(&input_key_tree);
/* List of default keys, the tree is built from this. */
static struct input_key_entry input_key_defaults[] = {
/* Paste keys. */
{ .key = KEYC_PASTE_START,
.data = "\033[200~"
},
{ .key = KEYC_PASTE_END,
.data = "\033[201~"
},
/* Function keys. */
{ .key = KEYC_F1,
.data = "\033OP"
},
{ .key = KEYC_F2,
.data = "\033OQ"
},
{ .key = KEYC_F3,
.data = "\033OR"
},
{ .key = KEYC_F4,
.data = "\033OS"
},
{ .key = KEYC_F5,
.data = "\033[15~"
},
{ .key = KEYC_F6,
.data = "\033[17~"
},
{ .key = KEYC_F7,
.data = "\033[18~"
},
{ .key = KEYC_F8,
.data = "\033[19~"
},
{ .key = KEYC_F9,
.data = "\033[20~"
},
{ .key = KEYC_F10,
.data = "\033[21~"
},
{ .key = KEYC_F11,
.data = "\033[23~"
},
{ .key = KEYC_F12,
.data = "\033[24~"
},
{ .key = KEYC_F1|KEYC_SHIFT,
.data = "\033[25~"
},
{ .key = KEYC_F2|KEYC_SHIFT,
.data = "\033[26~"
},
{ .key = KEYC_F3|KEYC_SHIFT,
.data = "\033[28~"
},
{ .key = KEYC_F4|KEYC_SHIFT,
.data = "\033[29~"
},
{ .key = KEYC_F5|KEYC_SHIFT,
.data = "\033[31~"
},
{ .key = KEYC_F6|KEYC_SHIFT,
.data = "\033[32~"
},
{ .key = KEYC_F7|KEYC_SHIFT,
.data = "\033[33~"
},
{ .key = KEYC_F8|KEYC_SHIFT,
.data = "\033[34~"
},
{ .key = KEYC_IC,
.data = "\033[2~"
},
{ .key = KEYC_DC,
.data = "\033[3~"
},
{ .key = KEYC_HOME,
.data = "\033[1~"
},
{ .key = KEYC_END,
.data = "\033[4~"
},
{ .key = KEYC_NPAGE,
.data = "\033[6~"
},
{ .key = KEYC_PPAGE,
.data = "\033[5~"
},
{ .key = KEYC_BTAB,
.data = "\033[Z"
},
/* Arrow keys. */
{ .key = KEYC_UP|KEYC_CURSOR,
.data = "\033OA"
},
{ .key = KEYC_DOWN|KEYC_CURSOR,
.data = "\033OB"
},
{ .key = KEYC_RIGHT|KEYC_CURSOR,
.data = "\033OC"
},
{ .key = KEYC_LEFT|KEYC_CURSOR,
.data = "\033OD"
},
{ .key = KEYC_UP,
.data = "\033[A"
},
{ .key = KEYC_DOWN,
.data = "\033[B"
},
{ .key = KEYC_RIGHT,
.data = "\033[C"
},
{ .key = KEYC_LEFT,
.data = "\033[D"
},
/* Keypad keys. */
{ .key = KEYC_KP_SLASH|KEYC_KEYPAD,
.data = "\033Oo"
},
{ .key = KEYC_KP_STAR|KEYC_KEYPAD,
.data = "\033Oj"
},
{ .key = KEYC_KP_MINUS|KEYC_KEYPAD,
.data = "\033Om"
},
{ .key = KEYC_KP_SEVEN|KEYC_KEYPAD,
.data = "\033Ow"
},
{ .key = KEYC_KP_EIGHT|KEYC_KEYPAD,
.data = "\033Ox"
},
{ .key = KEYC_KP_NINE|KEYC_KEYPAD,
.data = "\033Oy"
},
{ .key = KEYC_KP_PLUS|KEYC_KEYPAD,
.data = "\033Ok"
},
{ .key = KEYC_KP_FOUR|KEYC_KEYPAD,
.data = "\033Ot"
},
{ .key = KEYC_KP_FIVE|KEYC_KEYPAD,
.data = "\033Ou"
},
{ .key = KEYC_KP_SIX|KEYC_KEYPAD,
.data = "\033Ov"
},
{ .key = KEYC_KP_ONE|KEYC_KEYPAD,
.data = "\033Oq"
},
{ .key = KEYC_KP_TWO|KEYC_KEYPAD,
.data = "\033Or"
},
{ .key = KEYC_KP_THREE|KEYC_KEYPAD,
.data = "\033Os"
},
{ .key = KEYC_KP_ENTER|KEYC_KEYPAD,
.data = "\033OM"
},
{ .key = KEYC_KP_ZERO|KEYC_KEYPAD,
.data = "\033Op"
},
{ .key = KEYC_KP_PERIOD|KEYC_KEYPAD,
.data = "\033On"
},
{ .key = KEYC_KP_SLASH,
.data = "/"
},
{ .key = KEYC_KP_STAR,
.data = "*"
},
{ .key = KEYC_KP_MINUS,
.data = "-"
},
{ .key = KEYC_KP_SEVEN,
.data = "7"
},
{ .key = KEYC_KP_EIGHT,
.data = "8"
},
{ .key = KEYC_KP_NINE,
.data = "9"
},
{ .key = KEYC_KP_PLUS,
.data = "+"
},
{ .key = KEYC_KP_FOUR,
.data = "4"
},
{ .key = KEYC_KP_FIVE,
.data = "5"
},
{ .key = KEYC_KP_SIX,
.data = "6"
},
{ .key = KEYC_KP_ONE,
.data = "1"
},
{ .key = KEYC_KP_TWO,
.data = "2"
},
{ .key = KEYC_KP_THREE,
.data = "3"
},
{ .key = KEYC_KP_ENTER,
.data = "\n"
},
{ .key = KEYC_KP_ZERO,
.data = "0"
},
{ .key = KEYC_KP_PERIOD,
.data = "."
},
/* Keys with an embedded modifier. */
{ .key = KEYC_F1|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_P"
},
{ .key = KEYC_F2|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_Q"
},
{ .key = KEYC_F3|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_R"
},
{ .key = KEYC_F4|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_S"
},
{ .key = KEYC_F5|KEYC_BUILD_MODIFIERS,
.data = "\033[15;_~"
},
{ .key = KEYC_F6|KEYC_BUILD_MODIFIERS,
.data = "\033[17;_~"
},
{ .key = KEYC_F7|KEYC_BUILD_MODIFIERS,
.data = "\033[18;_~"
},
{ .key = KEYC_F8|KEYC_BUILD_MODIFIERS,
.data = "\033[19;_~"
},
{ .key = KEYC_F9|KEYC_BUILD_MODIFIERS,
.data = "\033[20;_~"
},
{ .key = KEYC_F10|KEYC_BUILD_MODIFIERS,
.data = "\033[21;_~"
},
{ .key = KEYC_F11|KEYC_BUILD_MODIFIERS,
.data = "\033[23;_~"
},
{ .key = KEYC_F12|KEYC_BUILD_MODIFIERS,
.data = "\033[24;_~"
},
{ .key = KEYC_UP|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_A"
},
{ .key = KEYC_DOWN|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_B"
},
{ .key = KEYC_RIGHT|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_C"
},
{ .key = KEYC_LEFT|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_D"
},
{ .key = KEYC_HOME|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_H"
},
{ .key = KEYC_END|KEYC_BUILD_MODIFIERS,
.data = "\033[1;_F"
},
{ .key = KEYC_PPAGE|KEYC_BUILD_MODIFIERS,
.data = "\033[5;_~"
},
{ .key = KEYC_NPAGE|KEYC_BUILD_MODIFIERS,
.data = "\033[6;_~"
},
{ .key = KEYC_IC|KEYC_BUILD_MODIFIERS,
.data = "\033[2;_~"
},
{ .key = KEYC_DC|KEYC_BUILD_MODIFIERS,
.data = "\033[3;_~"
}
};
static const key_code input_key_modifiers[] = {
0,
0,
KEYC_SHIFT,
KEYC_META|KEYC_IMPLIED_META,
KEYC_SHIFT|KEYC_META|KEYC_IMPLIED_META,
KEYC_CTRL,
KEYC_SHIFT|KEYC_CTRL,
KEYC_META|KEYC_IMPLIED_META|KEYC_CTRL,
KEYC_SHIFT|KEYC_META|KEYC_IMPLIED_META|KEYC_CTRL
};
/* Input key comparison function. */
static int
input_key_cmp(struct input_key_entry *ike1, struct input_key_entry *ike2)
{
if (ike1->key < ike2->key)
return (-1);
if (ike1->key > ike2->key)
return (1);
return (0);
}
/* Look for key in tree. */
static struct input_key_entry *
input_key_get (key_code key)
{
struct input_key_entry entry = { .key = key };
return (RB_FIND(input_key_tree, &input_key_tree, &entry));
}
/* Split a character into two UTF-8 bytes. */
static size_t
input_key_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);
}
/* Build input key tree. */
void
input_key_build(void)
{
struct input_key_entry *ike, *new;
u_int i, j;
char *data;
key_code key;
for (i = 0; i < nitems(input_key_defaults); i++) {
ike = &input_key_defaults[i];
if (~ike->key & KEYC_BUILD_MODIFIERS) {
RB_INSERT(input_key_tree, &input_key_tree, ike);
continue;
}
for (j = 2; j < nitems(input_key_modifiers); j++) {
key = (ike->key & ~KEYC_BUILD_MODIFIERS);
data = xstrdup(ike->data);
data[strcspn(data, "_")] = '0' + j;
new = xcalloc(1, sizeof *new);
new->key = key|input_key_modifiers[j];
new->data = data;
RB_INSERT(input_key_tree, &input_key_tree, new);
}
}
RB_FOREACH(ike, input_key_tree, &input_key_tree) {
log_debug("%s: 0x%llx (%s) is %s", __func__, ike->key,
key_string_lookup_key(ike->key, 1), ike->data);
}
}
/* Translate a key code into an output key sequence for a pane. */
int
input_key_pane(struct window_pane *wp, key_code key, struct mouse_event *m)
{
if (log_get_level() != 0) {
log_debug("writing key 0x%llx (%s) to %%%u", key,
key_string_lookup_key(key, 1), wp->id);
}
if (KEYC_IS_MOUSE(key)) {
if (m != NULL && m->wp != -1 && (u_int)m->wp == wp->id)
input_key_mouse(wp, m);
return (0);
}
return (input_key(wp->screen, wp->event, key));
}
/* Translate a key code into an output key sequence. */
int
input_key(struct screen *s, struct bufferevent *bev, key_code key)
{
struct input_key_entry *ike;
key_code justkey, newkey, outkey;
struct utf8_data ud;
char tmp[64], modifier;
/* Mouse keys need a pane. */
if (KEYC_IS_MOUSE(key))
return (0);
/* Literal keys go as themselves (can't be more than eight bits). */
if (key & KEYC_LITERAL) {
ud.data[0] = (u_char)key;
bufferevent_write(bev, &ud.data[0], 1);
return (0);
}
/* 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_MODIFIERS|KEYC_MASK_FLAGS));
}
/*
* 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_META|KEYC_IMPLIED_META));
if (justkey <= 0x7f) {
if (key & KEYC_META)
bufferevent_write(bev, "\033", 1);
ud.data[0] = justkey;
bufferevent_write(bev, &ud.data[0], 1);
return (0);
}
if (justkey > 0x7f && justkey < KEYC_BASE) {
if (key & KEYC_META)
bufferevent_write(bev, "\033", 1);
utf8_to_data(justkey, &ud);
bufferevent_write(bev, ud.data, ud.size);
return (0);
}
/*
* Look up in the tree. If not in application keypad or cursor mode,
* remove the flags from the key.
*/
if (~s->mode & MODE_KKEYPAD)
key &= ~KEYC_KEYPAD;
if (~s->mode & MODE_KCURSOR)
key &= ~KEYC_CURSOR;
ike = input_key_get(key);
if (ike == NULL && (key & KEYC_META) && (~key & KEYC_IMPLIED_META))
ike = input_key_get(key & ~KEYC_META);
if (ike == NULL && (key & KEYC_CURSOR))
ike = input_key_get(key & ~KEYC_CURSOR);
if (ike == NULL && (key & KEYC_KEYPAD))
ike = input_key_get(key & ~KEYC_KEYPAD);
if (ike != NULL) {
log_debug("found key 0x%llx: \"%s\"", key, ike->data);
if ((key & KEYC_META) && (~key & KEYC_IMPLIED_META))
bufferevent_write(bev, "\033", 1);
bufferevent_write(bev, ike->data, strlen(ike->data));
return (0);
}
/* No builtin key sequence; construct an extended key sequence. */
if (~s->mode & MODE_KEXTENDED) {
if ((key & KEYC_MASK_MODIFIERS) != KEYC_CTRL)
goto missing;
justkey = (key & KEYC_MASK_KEY);
switch (justkey) {
case ' ':
case '2':
key = 0|(key & ~KEYC_MASK_KEY);
break;
case '|':
key = 28|(key & ~KEYC_MASK_KEY);
break;
case '6':
key = 30|(key & ~KEYC_MASK_KEY);
break;
case '-':
case '/':
key = 31|(key & ~KEYC_MASK_KEY);
break;
case '?':
key = 127|(key & ~KEYC_MASK_KEY);
break;
default:
if (justkey >= 'A' && justkey <= '_')
key = (justkey - 'A')|(key & ~KEYC_MASK_KEY);
else if (justkey >= 'a' && justkey <= '~')
key = (justkey - 96)|(key & ~KEYC_MASK_KEY);
else
return (0);
break;
}
return (input_key(s, bev, key & ~KEYC_CTRL));
}
outkey = (key & KEYC_MASK_KEY);
switch (key & KEYC_MASK_MODIFIERS) {
case KEYC_SHIFT:
modifier = '2';
break;
case KEYC_META:
modifier = '3';
break;
case KEYC_SHIFT|KEYC_META:
modifier = '4';
break;
case KEYC_CTRL:
modifier = '5';
break;
case KEYC_SHIFT|KEYC_CTRL:
modifier = '6';
break;
case KEYC_META|KEYC_CTRL:
modifier = '7';
break;
case KEYC_SHIFT|KEYC_META|KEYC_CTRL:
modifier = '8';
break;
default:
goto missing;
}
xsnprintf(tmp, sizeof tmp, "\033[%llu;%cu", outkey, modifier);
bufferevent_write(bev, tmp, strlen(tmp));
return (0);
missing:
log_debug("key 0x%llx missing", key);
return (-1);
}
/* Get mouse event string. */
int
input_key_get_mouse(struct screen *s, struct mouse_event *m, u_int x, u_int y,
const char **rbuf, size_t *rlen)
{
static char buf[40];
size_t len;
*rbuf = NULL;
*rlen = 0;
/* If this pane is not in button or all mode, discard motion events. */
if (MOUSE_DRAG(m->b) && (s->mode & MOTION_MOUSE_MODES) == 0)
return (0);
if ((s->mode & ALL_MOUSE_MODES) == 0)
return (0);
/*
* 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 &&
(~s->mode & MODE_MOUSE_ALL))
return (0);
} else {
if (MOUSE_DRAG(m->b) &&
MOUSE_BUTTONS(m->b) == 3 &&
MOUSE_BUTTONS(m->lb) == 3 &&
(~s->mode & MODE_MOUSE_ALL))
return (0);
}
/*
* 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 (0);
len = xsnprintf(buf, sizeof buf, "\033[M");
len += input_key_split2(m->b + 32, &buf[len]);
len += input_key_split2(x + 33, &buf[len]);
len += input_key_split2(y + 33, &buf[len]);
} else {
if (m->b > 223)
return (0);
len = xsnprintf(buf, sizeof buf, "\033[M");
buf[len++] = m->b + 32;
buf[len++] = x + 33;
buf[len++] = y + 33;
}
*rbuf = buf;
*rlen = len;
return (1);
}
/* Translate mouse and output. */
static void
input_key_mouse(struct window_pane *wp, struct mouse_event *m)
{
struct screen *s = wp->screen;
u_int x, y;
const char *buf;
size_t len;
/* Ignore events if no mouse mode or the pane is not visible. */
if (m->ignore || (s->mode & ALL_MOUSE_MODES) == 0)
return;
if (cmd_mouse_at(wp, m, &x, &y, 0) != 0)
return;
if (!window_pane_visible(wp))
return;
if (!input_key_get_mouse(s, m, x, y, &buf, &len))
return;
log_debug("writing mouse %.*s to %%%u", (int)len, buf, wp->id);
bufferevent_write(wp->event, buf, len);
}
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