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tmux/input-keys.c
Nicholas Marriott 641191ab20 Support for windows larger than the client. 
This adds two new options, window-size and default-size, and a new
command, resize-window.

The force-width and force-height options, and the session_width and
session_height formats have been removed.

The new window-size option tells tmux how to work out the size of
windows: largest means it picks the size of the largest session,
smallest the smallest session (similar to the old behaviour) and
manual means that it does not automatically resize
windows. aggressive-resize modifies the choice of session for largest
and smallest as it did before.

If a window is in a session attached to a client that is too small,
only part of the window is shown. tmux attempts to keep the cursor
visible, so the part of the window displayed is changed as the cursor
moves (with a small delay, to try and avoid excess redrawing when
applications redraw status lines or similar that are not currently
visible).

Drawing windows which are larger than the client is not as efficient
as those which fit, particularly when the cursor moves, so it is
recommended to avoid using this on slow machines or networks (set
window-size to smallest or manual).

The resize-window command can be used to resize a window manually. If
it is used, the window-size option is automatically set to manual for
the window (undo this with "setw -u window-size"). resize-window works
in a similar way to resize-pane (-U -D -L -R -x -y flags) but also has
-a and -A flags. -a sets the window to the size of the smallest client
(what it would be if window-size was smallest) and -A the largest.

For the same behaviour as force-width or force-height, use
resize-width -x or -y.

If the global window-size option is set to manual, the default-size
option is used for new windows. If -x or -y is used with new-session,
that sets the default-size option for the new session.

The maximum size of a window is 10000x10000. But expect applications
to complain and higher memory use if you make a window that big. The
minimum size is the size required for the current layout including
borders.

This change allows some code improvements, most notably that since
windows can now never be cropped, that code can be removed from the
layout code, and since panes can now never be outside the size of the
window, window_pane_visible can be removed.
2018-08-20 15:22:14 +01:00

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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 *);
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[] = {
/* Backspace key. */
{ KEYC_BSPACE, "\177", 0 },
/* 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;
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;
}
/*
* 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 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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