/* $OpenBSD: cmd-set-option.c,v 1.141 2021/08/25 08:51:55 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"

/*
 * Set an option.
 */

static enum args_parse_type     cmd_set_option_args_parse(struct args *,
                                    u_int, char **);
static enum cmd_retval          cmd_set_option_exec(struct cmd *,
                                    struct cmdq_item *);

const struct cmd_entry cmd_set_option_entry = {
        .name = "set-option",
        .alias = "set",

        .args = { "aFgopqst:uUw", 1, 2, cmd_set_option_args_parse },
        .usage = "[-aFgopqsuUw] " CMD_TARGET_PANE_USAGE " option [value]",

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

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_option_exec
};

const struct cmd_entry cmd_set_window_option_entry = {
        .name = "set-window-option",
        .alias = "setw",

        .args = { "aFgoqt:u", 1, 2, cmd_set_option_args_parse },
        .usage = "[-aFgoqu] " CMD_TARGET_WINDOW_USAGE " option [value]",

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

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_option_exec
};

const struct cmd_entry cmd_set_hook_entry = {
        .name = "set-hook",
        .alias = NULL,

        .args = { "agpRt:uw", 1, 2, cmd_set_option_args_parse },
        .usage = "[-agpRuw] " CMD_TARGET_PANE_USAGE " hook [command]",

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

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_option_exec
};

static enum args_parse_type
cmd_set_option_args_parse(__unused struct args *args, u_int idx,
    __unused char **cause)
{
        if (idx == 1)
                return (ARGS_PARSE_COMMANDS_OR_STRING);
        return (ARGS_PARSE_STRING);
}

static enum cmd_retval
cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args                     *args = cmd_get_args(self);
        int                              append = args_has(args, 'a');
        struct cmd_find_state           *target = cmdq_get_target(item);
        struct window_pane              *loop;
        struct options                  *oo;
        struct options_entry            *parent, *o, *po;
        char                            *name, *argument, *expanded = NULL;
        char                            *cause;
        const char                      *value;
        int                              window, idx, already, error, ambiguous;
        int                              scope;

        window = (cmd_get_entry(self) == &cmd_set_window_option_entry);

        /* Expand argument. */
        argument = format_single_from_target(item, args_string(args, 0));

        /* If set-hook -R, fire the hook straight away. */
        if (cmd_get_entry(self) == &cmd_set_hook_entry && args_has(args, 'R')) {
                notify_hook(item, argument);
                free(argument);
                return (CMD_RETURN_NORMAL);
        }

        /* Parse option name and index. */
        name = options_match(argument, &idx, &ambiguous);
        if (name == NULL) {
                if (args_has(args, 'q'))
                        goto out;
                if (ambiguous)
                        cmdq_error(item, "ambiguous option: %s", argument);
                else
                        cmdq_error(item, "invalid option: %s", argument);
                goto fail;
        }
        if (args_count(args) < 2)
                value = NULL;
        else
                value = args_string(args, 1);
        if (value != NULL && args_has(args, 'F')) {
                expanded = format_single_from_target(item, value);
                value = expanded;
        }

        /* Get the scope and table for the option .*/
        scope = options_scope_from_name(args, window, name, target, &oo,
            &cause);
        if (scope == OPTIONS_TABLE_NONE) {
                if (args_has(args, 'q'))
                        goto out;
                cmdq_error(item, "%s", cause);
                free(cause);
                goto fail;
        }
        o = options_get_only(oo, name);
        parent = options_get(oo, name);

        /* Check that array options and indexes match up. */
        if (idx != -1 && (*name == '@' || !options_is_array(parent))) {
                cmdq_error(item, "not an array: %s", argument);
                goto fail;
        }

        /* With -o, check this option is not already set. */
        if (!args_has(args, 'u') && args_has(args, 'o')) {
                if (idx == -1)
                        already = (o != NULL);
                else {
                        if (o == NULL)
                                already = 0;
                        else
                                already = (options_array_get(o, idx) != NULL);
                }
                if (already) {
                        if (args_has(args, 'q'))
                                goto out;
                        cmdq_error(item, "already set: %s", argument);
                        goto fail;
                }
        }

        /* Change the option. */
        if (args_has(args, 'U') && scope == OPTIONS_TABLE_WINDOW) {
                TAILQ_FOREACH(loop, &target->w->panes, entry) {
                        po = options_get_only(loop->options, name);
                        if (po == NULL)
                                continue;
                        if (options_remove_or_default(po, idx, &cause) != 0) {
                                cmdq_error(item, "%s", cause);
                                free(cause);
                                goto fail;
                        }
                }
        }
        if (args_has(args, 'u') || args_has(args, 'U')) {
                if (o == NULL)
                        goto out;
                if (options_remove_or_default(o, idx, &cause) != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        goto fail;
                }
        } else if (*name == '@') {
                if (value == NULL) {
                        cmdq_error(item, "empty value");
                        goto fail;
                }
                options_set_string(oo, name, append, "%s", value);
        } else if (idx == -1 && !options_is_array(parent)) {
                error = options_from_string(oo, options_table_entry(parent),
                    options_table_entry(parent)->name, value,
                    args_has(args, 'a'), &cause);
                if (error != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        goto fail;
                }
        } else {
                if (value == NULL) {
                        cmdq_error(item, "empty value");
                        goto fail;
                }
                if (o == NULL)
                        o = options_empty(oo, options_table_entry(parent));
                if (idx == -1) {
                        if (!append)
                                options_array_clear(o);
                        if (options_array_assign(o, value, &cause) != 0) {
                                cmdq_error(item, "%s", cause);
                                free(cause);
                                goto fail;
                        }
                } else if (options_array_set(o, idx, value, append,
                    &cause) != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        goto fail;
                }
        }

        options_push_changes(name);

out:
        free(argument);
        free(expanded);
        free(name);
        return (CMD_RETURN_NORMAL);

fail:
        free(argument);
        free(expanded);
        free(name);
        return (CMD_RETURN_ERROR);
}