/* $OpenBSD: cmd-refresh-client.c,v 1.51 2025/12/02 08:20:32 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 <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:r:F:lLRSt:U", 0, 1, NULL },
        .usage = "[-cDlLRSU] [-A pane:state] [-B name:what:format] "
                 "[-C XxY] [-f flags] [-r pane:report] " 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 enum cmd_retval
cmd_refresh_client_control_client_size(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct client           *tc = cmdq_get_target_client(item);
        const char              *size = args_get(args, 'C');
        u_int                    w, x, y;
        struct client_window    *cw;

        if (sscanf(size, "@%u:%ux%u", &w, &x, &y) == 3) {
                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);
                }
                log_debug("%s: client %s window @%u: size %ux%u", __func__,
                    tc->name, w, x, y);
                cw = server_client_add_client_window(tc, w);
                cw->sx = x;
                cw->sy = y;
                tc->flags |= CLIENT_WINDOWSIZECHANGED;
                recalculate_sizes_now(1);
                return (CMD_RETURN_NORMAL);
        }
        if (sscanf(size, "@%u:", &w) == 1) {
                cw = server_client_get_client_window(tc, w);
                if (cw != NULL) {
                        log_debug("%s: client %s window @%u: no size", __func__,
                            tc->name, w);
                        cw->sx = 0;
                        cw->sy = 0;
                        recalculate_sizes_now(1);
                }
                return (CMD_RETURN_NORMAL);
        }

        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);
}

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 void
cmd_refresh_report(struct tty *tty, const char *value)
{
        struct window_pane      *wp;
        u_int                    pane;
        size_t                   size = 0;
        char                    *copy, *split;

        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;

        tty_keys_colours(tty, split, strlen(split), &size, &wp->control_fg,
            &wp->control_bg);

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              *errstr;
        u_int                    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_count(args) == 0)
                        adjust = 1;
                else {
                        adjust = strtonum(args_string(args, 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_clipboard_query(&tc->tty);
                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, 'r'))
                cmd_refresh_report(tty, args_get(args, 'r'));

        if (args_has(args, 'A')) {
                if (~tc->flags & CLIENT_CONTROL)
                        goto not_control_client;
                av = args_first_value(args, 'A');
                while (av != NULL) {
                        cmd_refresh_client_update_offset(tc, av->string);
                        av = args_next_value(av);
                }
                return (CMD_RETURN_NORMAL);
        }
        if (args_has(args, 'B')) {
                if (~tc->flags & CLIENT_CONTROL)
                        goto not_control_client;
                av = args_first_value(args, 'B');
                while (av != NULL) {
                        cmd_refresh_client_update_subscription(tc, av->string);
                        av = args_next_value(av);
                }
                return (CMD_RETURN_NORMAL);
        }
        if (args_has(args, 'C')) {
                if (~tc->flags & CLIENT_CONTROL)
                        goto not_control_client;
                return (cmd_refresh_client_control_client_size(self, item));
        }

        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);
}