/* $OpenBSD: cmd-select-window.c,v 1.30 2021/08/21 10:22:39 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 "tmux.h"

/*
 * Select window by index.
 */

static enum cmd_retval  cmd_select_window_exec(struct cmd *,
                            struct cmdq_item *);

const struct cmd_entry cmd_select_window_entry = {
        .name = "select-window",
        .alias = "selectw",

        .args = { "lnpTt:", 0, 0, NULL },
        .usage = "[-lnpT] " CMD_TARGET_WINDOW_USAGE,

        .target = { 't', CMD_FIND_WINDOW, 0 },

        .flags = 0,
        .exec = cmd_select_window_exec
};

const struct cmd_entry cmd_next_window_entry = {
        .name = "next-window",
        .alias = "next",

        .args = { "at:", 0, 0, NULL },
        .usage = "[-a] " CMD_TARGET_SESSION_USAGE,

        .target = { 't', CMD_FIND_SESSION, 0 },

        .flags = 0,
        .exec = cmd_select_window_exec
};

const struct cmd_entry cmd_previous_window_entry = {
        .name = "previous-window",
        .alias = "prev",

        .args = { "at:", 0, 0, NULL },
        .usage = "[-a] " CMD_TARGET_SESSION_USAGE,

        .target = { 't', CMD_FIND_SESSION, 0 },

        .flags = 0,
        .exec = cmd_select_window_exec
};

const struct cmd_entry cmd_last_window_entry = {
        .name = "last-window",
        .alias = "last",

        .args = { "t:", 0, 0, NULL },
        .usage = CMD_TARGET_SESSION_USAGE,

        .target = { 't', CMD_FIND_SESSION, 0 },

        .flags = 0,
        .exec = cmd_select_window_exec
};

static enum cmd_retval
cmd_select_window_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct client           *c = cmdq_get_client(item);
        struct cmd_find_state   *current = cmdq_get_current(item);
        struct cmd_find_state   *target = cmdq_get_target(item);
        struct winlink          *wl = target->wl;
        struct session          *s = target->s;
        int                      next, previous, last, activity;

        next = (cmd_get_entry(self) == &cmd_next_window_entry);
        if (args_has(args, 'n'))
                next = 1;
        previous = (cmd_get_entry(self) == &cmd_previous_window_entry);
        if (args_has(args, 'p'))
                previous = 1;
        last = (cmd_get_entry(self) == &cmd_last_window_entry);
        if (args_has(args, 'l'))
                last = 1;

        if (next || previous || last) {
                activity = args_has(args, 'a');
                if (next) {
                        if (session_next(s, activity) != 0) {
                                cmdq_error(item, "no next window");
                                return (CMD_RETURN_ERROR);
                        }
                } else if (previous) {
                        if (session_previous(s, activity) != 0) {
                                cmdq_error(item, "no previous window");
                                return (CMD_RETURN_ERROR);
                        }
                } else {
                        if (session_last(s) != 0) {
                                cmdq_error(item, "no last window");
                                return (CMD_RETURN_ERROR);
                        }
                }
                cmd_find_from_session(current, s, 0);
                server_redraw_session(s);
                cmdq_insert_hook(s, item, current, "after-select-window");
        } else {
                /*
                 * If -T and select-window is invoked on same window as
                 * current, switch to previous window.
                 */
                if (args_has(args, 'T') && wl == s->curw) {
                        if (session_last(s) != 0) {
                                cmdq_error(item, "no last window");
                                return (-1);
                        }
                        if (current->s == s)
                                cmd_find_from_session(current, s, 0);
                        server_redraw_session(s);
                } else if (session_select(s, wl->idx) == 0) {
                        cmd_find_from_session(current, s, 0);
                        server_redraw_session(s);
                }
                cmdq_insert_hook(s, item, current, "after-select-window");
        }
        if (c != NULL && c->session != NULL)
                s->curw->window->latest = c;
        recalculate_sizes();

        return (CMD_RETURN_NORMAL);
}