/* $OpenBSD: cmd-select-pane.c,v 1.70 2025/03/04 08:45:04 nicm Exp $ */

/*
 * Copyright (c) 2009 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"

/*
 * Select pane.
 */

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

const struct cmd_entry cmd_select_pane_entry = {
        .name = "select-pane",
        .alias = "selectp",

        .args = { "DdegLlMmP:RT:t:UZ", 0, 0, NULL }, /* -P and -g deprecated */
        .usage = "[-DdeLlMmRUZ] [-T title] " CMD_TARGET_PANE_USAGE,

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

        .flags = 0,
        .exec = cmd_select_pane_exec
};

const struct cmd_entry cmd_last_pane_entry = {
        .name = "last-pane",
        .alias = "lastp",

        .args = { "det:Z", 0, 0, NULL },
        .usage = "[-deZ] " CMD_TARGET_WINDOW_USAGE,

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

        .flags = 0,
        .exec = cmd_select_pane_exec
};

static void
cmd_select_pane_redraw(struct window *w)
{
        struct client   *c;

        /*
         * Redraw entire window if it is bigger than the client (the
         * offset may change), otherwise just draw borders.
         */

        TAILQ_FOREACH(c, &clients, entry) {
                if (c->session == NULL || (c->flags & CLIENT_CONTROL))
                        continue;
                if (c->session->curw->window == w && tty_window_bigger(&c->tty))
                        server_redraw_client(c);
                else {
                        if (c->session->curw->window == w)
                                c->flags |= CLIENT_REDRAWBORDERS;
                        if (session_has(c->session, w))
                                c->flags |= CLIENT_REDRAWSTATUS;
                }

        }
}

static enum cmd_retval
cmd_select_pane_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        const struct cmd_entry  *entry = cmd_get_entry(self);
        struct cmd_find_state   *current = cmdq_get_current(item);
        struct cmd_find_state   *target = cmdq_get_target(item);
        struct client           *c = cmdq_get_client(item);
        struct winlink          *wl = target->wl;
        struct window           *w = wl->window;
        struct session          *s = target->s;
        struct window_pane      *wp = target->wp, *activewp, *lastwp, *markedwp;
        struct options          *oo = wp->options;
        char                    *title;
        const char              *style;
        struct options_entry    *o;

        if (entry == &cmd_last_pane_entry || args_has(args, 'l')) {
                /*
                 * Check for no last pane found in case the other pane was
                 * spawned without being visited (for example split-window -d).
                 */
                lastwp = TAILQ_FIRST(&w->last_panes);
                if (lastwp == NULL && window_count_panes(w) == 2) {
                        lastwp = TAILQ_PREV(w->active, window_panes, entry);
                        if (lastwp == NULL)
                                lastwp = TAILQ_NEXT(w->active, entry);
                }
                if (lastwp == NULL) {
                        cmdq_error(item, "no last pane");
                        return (CMD_RETURN_ERROR);
                }
                if (args_has(args, 'e')) {
                        lastwp->flags &= ~PANE_INPUTOFF;
                        server_redraw_window_borders(lastwp->window);
                        server_status_window(lastwp->window);
                } else if (args_has(args, 'd')) {
                        lastwp->flags |= PANE_INPUTOFF;
                        server_redraw_window_borders(lastwp->window);
                        server_status_window(lastwp->window);
                } else {
                        if (window_push_zoom(w, 0, args_has(args, 'Z')))
                                server_redraw_window(w);
                        window_redraw_active_switch(w, lastwp);
                        if (window_set_active_pane(w, lastwp, 1)) {
                                cmd_find_from_winlink(current, wl, 0);
                                cmd_select_pane_redraw(w);
                        }
                        if (window_pop_zoom(w))
                                server_redraw_window(w);
                }
                return (CMD_RETURN_NORMAL);
        }

        if (args_has(args, 'm') || args_has(args, 'M')) {
                if (args_has(args, 'm') && !window_pane_visible(wp))
                        return (CMD_RETURN_NORMAL);
                if (server_check_marked())
                        lastwp = marked_pane.wp;
                else
                        lastwp = NULL;

                if (args_has(args, 'M') || server_is_marked(s, wl, wp))
                        server_clear_marked();
                else
                        server_set_marked(s, wl, wp);
                markedwp = marked_pane.wp;

                if (lastwp != NULL) {
                        lastwp->flags |= (PANE_REDRAW|PANE_STYLECHANGED|
                            PANE_THEMECHANGED);
                        server_redraw_window_borders(lastwp->window);
                        server_status_window(lastwp->window);
                }
                if (markedwp != NULL) {
                        markedwp->flags |= (PANE_REDRAW|PANE_STYLECHANGED|
                            PANE_THEMECHANGED);
                        server_redraw_window_borders(markedwp->window);
                        server_status_window(markedwp->window);
                }
                return (CMD_RETURN_NORMAL);
        }

        style = args_get(args, 'P');
        if (style != NULL) {
                o = options_set_string(oo, "window-style", 0, "%s", style);
                if (o == NULL) {
                        cmdq_error(item, "bad style: %s", style);
                        return (CMD_RETURN_ERROR);
                }
                options_set_string(oo, "window-active-style", 0, "%s", style);
                wp->flags |= (PANE_REDRAW|PANE_STYLECHANGED|PANE_THEMECHANGED);
        }
        if (args_has(args, 'g')) {
                cmdq_print(item, "%s", options_get_string(oo, "window-style"));
                return (CMD_RETURN_NORMAL);
        }

        if (args_has(args, 'L')) {
                window_push_zoom(w, 0, 1);
                wp = window_pane_find_left(wp);
                window_pop_zoom(w);
        } else if (args_has(args, 'R')) {
                window_push_zoom(w, 0, 1);
                wp = window_pane_find_right(wp);
                window_pop_zoom(w);
        } else if (args_has(args, 'U')) {
                window_push_zoom(w, 0, 1);
                wp = window_pane_find_up(wp);
                window_pop_zoom(w);
        } else if (args_has(args, 'D')) {
                window_push_zoom(w, 0, 1);
                wp = window_pane_find_down(wp);
                window_pop_zoom(w);
        }
        if (wp == NULL)
                return (CMD_RETURN_NORMAL);

        if (args_has(args, 'e')) {
                wp->flags &= ~PANE_INPUTOFF;
                server_redraw_window_borders(wp->window);
                server_status_window(wp->window);
                return (CMD_RETURN_NORMAL);
        }
        if (args_has(args, 'd')) {
                wp->flags |= PANE_INPUTOFF;
                server_redraw_window_borders(wp->window);
                server_status_window(wp->window);
                return (CMD_RETURN_NORMAL);
        }

        if (args_has(args, 'T')) {
                title = format_single_from_target(item, args_get(args, 'T'));
                if (screen_set_title(&wp->base, title)) {
                        notify_pane("pane-title-changed", wp);
                        server_redraw_window_borders(wp->window);
                        server_status_window(wp->window);
                }
                free(title);
                return (CMD_RETURN_NORMAL);
        }

        if (c != NULL && c->session != NULL && (c->flags & CLIENT_ACTIVEPANE))
                activewp = server_client_get_pane(c);
        else
                activewp = w->active;
        if (wp == activewp)
                return (CMD_RETURN_NORMAL);
        if (window_push_zoom(w, 0, args_has(args, 'Z')))
                server_redraw_window(w);
        window_redraw_active_switch(w, wp);
        if (c != NULL && c->session != NULL && (c->flags & CLIENT_ACTIVEPANE))
                server_client_set_pane(c, wp);
        else if (window_set_active_pane(w, wp, 1))
                cmd_find_from_winlink_pane(current, wl, wp, 0);
        cmdq_insert_hook(s, item, current, "after-select-pane");
        cmd_select_pane_redraw(w);
        if (window_pop_zoom(w))
                server_redraw_window(w);

        return (CMD_RETURN_NORMAL);
}