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tmux/cmd-refresh-client.c
nicm 66d5e5de7a Add a way for control mode clients to subscribe to a format and be
notified of changes rather than having to poll. GitHub issue 2242.
2020-07-06 09:14:20 +00:00

237 lines
6.0 KiB
C

/* $OpenBSD$ */
/*
* 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"
/*
* Refresh client.
*/
static enum cmd_retval cmd_refresh_client_exec(struct cmd *,
struct cmdq_item *);
const struct cmd_entry cmd_refresh_client_entry = {
.name = "refresh-client",
.alias = "refresh",
.args = { "A:B:cC:Df:F:lLRSt:U", 0, 1 },
.usage = "[-cDlLRSU] [-A pane:state] [-B name:what:format] "
"[-C XxY] [-f flags] " CMD_TARGET_CLIENT_USAGE " [adjustment]",
.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG,
.exec = cmd_refresh_client_exec
};
static void
cmd_refresh_client_update_subscription(struct client *tc, const char *value)
{
char *copy, *split, *name, *what;
enum control_sub_type subtype;
int subid = -1;
copy = name = xstrdup(value);
if ((split = strchr(copy, ':')) == NULL) {
control_remove_sub(tc, copy);
goto out;
}
*split++ = '\0';
what = split;
if ((split = strchr(what, ':')) == NULL)
goto out;
*split++ = '\0';
if (strcmp(what, "%*") == 0)
subtype = CONTROL_SUB_ALL_PANES;
else if (sscanf(what, "%%%d", &subid) == 1 && subid >= 0)
subtype = CONTROL_SUB_PANE;
else if (strcmp(what, "@*") == 0)
subtype = CONTROL_SUB_ALL_WINDOWS;
else if (sscanf(what, "@%d", &subid) == 1 && subid >= 0)
subtype = CONTROL_SUB_WINDOW;
else
subtype = CONTROL_SUB_SESSION;
control_add_sub(tc, name, subtype, subid, split);
out:
free(copy);
}
static void
cmd_refresh_client_update_offset(struct client *tc, const char *value)
{
struct window_pane *wp;
char *copy, *split;
u_int pane;
if (*value != '%')
return;
copy = xstrdup(value);
if ((split = strchr(copy, ':')) == NULL)
goto out;
*split++ = '\0';
if (sscanf(copy, "%%%u", &pane) != 1)
goto out;
wp = window_pane_find_by_id(pane);
if (wp == NULL)
goto out;
if (strcmp(split, "on") == 0)
control_set_pane_on(tc, wp);
else if (strcmp(split, "off") == 0)
control_set_pane_off(tc, wp);
else if (strcmp(split, "continue") == 0)
control_continue_pane(tc, wp);
else if (strcmp(split, "pause") == 0)
control_pause_pane(tc, wp);
out:
free(copy);
}
static enum cmd_retval
cmd_refresh_client_exec(struct cmd *self, struct cmdq_item *item)
{
struct args *args = cmd_get_args(self);
struct client *tc = cmdq_get_target_client(item);
struct tty *tty = &tc->tty;
struct window *w;
const char *size, *errstr, *value;
u_int x, y, adjust;
struct args_value *av;
if (args_has(args, 'c') ||
args_has(args, 'L') ||
args_has(args, 'R') ||
args_has(args, 'U') ||
args_has(args, 'D'))
{
if (args->argc == 0)
adjust = 1;
else {
adjust = strtonum(args->argv[0], 1, INT_MAX, &errstr);
if (errstr != NULL) {
cmdq_error(item, "adjustment %s", errstr);
return (CMD_RETURN_ERROR);
}
}
if (args_has(args, 'c'))
tc->pan_window = NULL;
else {
w = tc->session->curw->window;
if (tc->pan_window != w) {
tc->pan_window = w;
tc->pan_ox = tty->oox;
tc->pan_oy = tty->ooy;
}
if (args_has(args, 'L')) {
if (tc->pan_ox > adjust)
tc->pan_ox -= adjust;
else
tc->pan_ox = 0;
} else if (args_has(args, 'R')) {
tc->pan_ox += adjust;
if (tc->pan_ox > w->sx - tty->osx)
tc->pan_ox = w->sx - tty->osx;
} else if (args_has(args, 'U')) {
if (tc->pan_oy > adjust)
tc->pan_oy -= adjust;
else
tc->pan_oy = 0;
} else if (args_has(args, 'D')) {
tc->pan_oy += adjust;
if (tc->pan_oy > w->sy - tty->osy)
tc->pan_oy = w->sy - tty->osy;
}
}
tty_update_client_offset(tc);
server_redraw_client(tc);
return (CMD_RETURN_NORMAL);
}
if (args_has(args, 'l')) {
tty_putcode_ptr2(&tc->tty, TTYC_MS, "", "?");
return (CMD_RETURN_NORMAL);
}
if (args_has(args, 'F')) /* -F is an alias for -f */
server_client_set_flags(tc, args_get(args, 'F'));
if (args_has(args, 'f'))
server_client_set_flags(tc, args_get(args, 'f'));
if (args_has(args, 'A')) {
if (~tc->flags & CLIENT_CONTROL)
goto not_control_client;
value = args_first_value(args, 'A', &av);
while (value != NULL) {
cmd_refresh_client_update_offset(tc, value);
value = args_next_value(&av);
}
return (CMD_RETURN_NORMAL);
}
if (args_has(args, 'B')) {
if (~tc->flags & CLIENT_CONTROL)
goto not_control_client;
value = args_first_value(args, 'B', &av);
while (value != NULL) {
cmd_refresh_client_update_subscription(tc, value);
value = args_next_value(&av);
}
return (CMD_RETURN_NORMAL);
}
if (args_has(args, 'C')) {
if (~tc->flags & CLIENT_CONTROL)
goto not_control_client;
size = args_get(args, 'C');
if (sscanf(size, "%u,%u", &x, &y) != 2 &&
sscanf(size, "%ux%u", &x, &y) != 2) {
cmdq_error(item, "bad size argument");
return (CMD_RETURN_ERROR);
}
if (x < WINDOW_MINIMUM || x > WINDOW_MAXIMUM ||
y < WINDOW_MINIMUM || y > WINDOW_MAXIMUM) {
cmdq_error(item, "size too small or too big");
return (CMD_RETURN_ERROR);
}
tty_set_size(&tc->tty, x, y, 0, 0);
tc->flags |= CLIENT_SIZECHANGED;
recalculate_sizes_now(1);
return (CMD_RETURN_NORMAL);
}
if (args_has(args, 'S')) {
tc->flags |= CLIENT_STATUSFORCE;
server_status_client(tc);
} else {
tc->flags |= CLIENT_STATUSFORCE;
server_redraw_client(tc);
}
return (CMD_RETURN_NORMAL);
not_control_client:
cmdq_error(item, "not a control client");
return (CMD_RETURN_ERROR);
}