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Simplify the way jobs work and drop the persist type, so all jobs are
fire-and-forget.

Status jobs now managed with two trees of output (new and old), rather
than storing the output in the jobs themselves. When the status line is
processed any jobs which don't appear in the new tree are started and
the output from the old tree displayed. When a job finishes it updates
the new tree with its output and that is used for any subsequent
redraws. When the status interval expires, the new tree is moved to the
old so that all jobs are run again.

This fixes the "#(echo %H:%M:%S)" problem which would lead to thousands
of identical persistent jobs and high memory use (this can still be
achieved by adding "sleep 30" but that is much less likely to happen by
accident).

/* $OpenBSD: cmd-set-option.c,v 1.47 2011/01/26 01:54:56 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * 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.
 */

int	cmd_set_option_exec(struct cmd *, struct cmd_ctx *);

int	cmd_set_option_unset(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
int	cmd_set_option_set(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);

struct options_entry *cmd_set_option_string(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
struct options_entry *cmd_set_option_number(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
struct options_entry *cmd_set_option_keys(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
struct options_entry *cmd_set_option_colour(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
struct options_entry *cmd_set_option_attributes(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
struct options_entry *cmd_set_option_flag(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);
struct options_entry *cmd_set_option_choice(struct cmd *, struct cmd_ctx *,
	    const struct options_table_entry *, struct options *,
	    const char *);

const struct cmd_entry cmd_set_option_entry = {
	"set-option", "set",
	"agst:uw", 1, 2,
	"[-agsuw] [-t target-session|target-window] option [value]",
	0,
	NULL,
	NULL,
	cmd_set_option_exec
};

const struct cmd_entry cmd_set_window_option_entry = {
	"set-window-option", "setw",
	"agt:u", 1, 2,
	"[-agu] " CMD_TARGET_WINDOW_USAGE " option [value]",
	0,
	NULL,
	NULL,
	cmd_set_option_exec
};

int
cmd_set_option_exec(struct cmd *self, struct cmd_ctx *ctx)
{
	struct args				*args = self->args;
	const struct options_table_entry	*table, *oe, *oe_loop;
	struct session				*s;
	struct winlink				*wl;
	struct client				*c;
	struct options				*oo;
	const char				*optstr, *valstr;
	u_int					 i;

	/* Work out the options tree and table to use. */
	if (args_has(self->args, 's')) {
		oo = &global_options;
		table = server_options_table;
	} else if (args_has(self->args, 'w') ||
	    self->entry == &cmd_set_window_option_entry) {
		table = window_options_table;
		if (args_has(self->args, 'g'))
			oo = &global_w_options;
		else {
			wl = cmd_find_window(ctx, args_get(args, 't'), NULL);
			if (wl == NULL)
				return (-1);
			oo = &wl->window->options;
		}
	} else {
		table = session_options_table;
		if (args_has(self->args, 'g'))
			oo = &global_s_options;
		else {
			s = cmd_find_session(ctx, args_get(args, 't'));
			if (s == NULL)
				return (-1);
			oo = &s->options;
		}
	}

	/* Get the option name and value. */
	optstr = args->argv[0];
	if (*optstr == '\0') {
		ctx->error(ctx, "invalid option");
		return (-1);
	}
	if (args->argc < 2)
		valstr = NULL;
	else
		valstr = args->argv[1];

	/* Find the option table entry. */
	oe = NULL;
	for (oe_loop = table; oe_loop->name != NULL; oe_loop++) {
		if (strncmp(oe_loop->name, optstr, strlen(optstr)) != 0)
			continue;

		if (oe != NULL) {
			ctx->error(ctx, "ambiguous option: %s", optstr);
			return (-1);
		}
		oe = oe_loop;

		/* Bail now if an exact match. */
		if (strcmp(oe->name, optstr) == 0)
			break;
	}
	if (oe == NULL) {
		ctx->error(ctx, "unknown option: %s", optstr);
		return (-1);
	}

	/* Unset or set the option. */
	if (args_has(args, 'u')) {
		if (cmd_set_option_unset(self, ctx, oe, oo, valstr) != 0)
			return (-1);
	} else {
		if (cmd_set_option_set(self, ctx, oe, oo, valstr) != 0)
			return (-1);
	}

	/* Update sizes and redraw. May not need it but meh. */
	recalculate_sizes();
	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
		c = ARRAY_ITEM(&clients, i);
		if (c != NULL && c->session != NULL)
			server_redraw_client(c);
	}

	/*
	 * Special-case: kill all persistent jobs if status-left, status-right
	 * or set-titles-string have changed. Persistent jobs are only used by
	 * the status line at the moment so this works XXX.
	 */
	if (strcmp(oe->name, "status-left") == 0 ||
	    strcmp(oe->name, "status-right") == 0 ||
	    strcmp(oe->name, "status") == 0 ||
	    strcmp(oe->name, "set-titles-string") == 0 ||
	    strcmp(oe->name, "window-status-format") == 0) {
		for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
			c = ARRAY_ITEM(&clients, i);
			if (c != NULL && c->session != NULL)
				server_redraw_client(c);
		}
	}

	return (0);
}

/* Unset an option. */
int
cmd_set_option_unset(struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	struct args	*args = self->args;

	if (args_has(args, 'g')) {
		ctx->error(ctx, "can't unset global option: %s", oe->name);
		return (-1);
	}
	if (value != NULL) {
		ctx->error(ctx, "value passed to unset option: %s", oe->name);
		return (-1);
	}

	options_remove(oo, oe->name);
	ctx->info(ctx, "unset option: %s", oe->name);
	return (0);
}

/* Set an option. */
int
cmd_set_option_set(struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	struct options_entry	*o;
	const char		*s;

	if (oe->type != OPTIONS_TABLE_FLAG && value == NULL) {
		ctx->error(ctx, "empty value");
		return (-1);
	}

	o = NULL;
	switch (oe->type) {
	case OPTIONS_TABLE_STRING:
		o = cmd_set_option_string(self, ctx, oe, oo, value);
		break;
	case OPTIONS_TABLE_NUMBER:
		o = cmd_set_option_number(self, ctx, oe, oo, value);
		break;
	case OPTIONS_TABLE_KEYS:
		o = cmd_set_option_keys(self, ctx, oe, oo, value);
		break;
	case OPTIONS_TABLE_COLOUR:
		o = cmd_set_option_colour(self, ctx, oe, oo, value);
		break;
	case OPTIONS_TABLE_ATTRIBUTES:
		o = cmd_set_option_attributes(self, ctx, oe, oo, value);
		break;
	case OPTIONS_TABLE_FLAG:
		o = cmd_set_option_flag(self, ctx, oe, oo, value);
		break;
	case OPTIONS_TABLE_CHOICE:
		o = cmd_set_option_choice(self, ctx, oe, oo, value);
		break;
	}
	if (o == NULL)
		return (-1);

	s = options_table_print_entry(oe, o);
	ctx->info(ctx, "set option: %s -> %s", oe->name, s);
	return (0);
}

/* Set a string option. */
struct options_entry *
cmd_set_option_string(struct cmd *self, unused struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	struct args	*args = self->args;
	struct options_entry	*o;
	char			*oldval, *newval;

	if (args_has(args, 'a')) {
		oldval = options_get_string(oo, oe->name);
		xasprintf(&newval, "%s%s", oldval, value);
	} else
		newval = xstrdup(value);

	o = options_set_string(oo, oe->name, "%s", newval);

	xfree(newval);
	return (o);
}

/* Set a number option. */
struct options_entry *
cmd_set_option_number(unused struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	long long	 ll;
	const char     	*errstr;

	ll = strtonum(value, oe->minimum, oe->maximum, &errstr);
	if (errstr != NULL) {
		ctx->error(ctx, "value is %s: %s", errstr, value);
		return (NULL);
	}

	return (options_set_number(oo, oe->name, ll));
}

/* Set a keys option. */
struct options_entry *
cmd_set_option_keys(unused struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	struct keylist	*keylist;
	char		*copy, *ptr, *s;
	int		 key;

	keylist = xmalloc(sizeof *keylist);
	ARRAY_INIT(keylist);

	ptr = copy = xstrdup(value);
	while ((s = strsep(&ptr, ",")) != NULL) {
		if ((key = key_string_lookup_string(s)) == KEYC_NONE) {
			ctx->error(ctx, "unknown key: %s", s);
			xfree(copy);
			xfree(keylist);
			return (NULL);
		}
		ARRAY_ADD(keylist, key);
	}
	xfree(copy);

	return (options_set_data(oo, oe->name, keylist, xfree));
}

/* Set a colour option. */
struct options_entry *
cmd_set_option_colour(unused struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	int	colour;

	if ((colour = colour_fromstring(value)) == -1) {
		ctx->error(ctx, "bad colour: %s", value);
		return (NULL);
	}

	return (options_set_number(oo, oe->name, colour));
}

/* Set an attributes option. */
struct options_entry *
cmd_set_option_attributes(unused struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	int	attr;

	if ((attr = attributes_fromstring(value)) == -1) {
		ctx->error(ctx, "bad attributes: %s", value);
		return (NULL);
	}

	return (options_set_number(oo, oe->name, attr));
}

/* Set a flag option. */
struct options_entry *
cmd_set_option_flag(unused struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	int	flag;

	if (value == NULL || *value == '\0')
		flag = !options_get_number(oo, oe->name);
	else {
		if ((value[0] == '1' && value[1] == '\0') ||
		    strcasecmp(value, "on") == 0 ||
		    strcasecmp(value, "yes") == 0)
			flag = 1;
		else if ((value[0] == '0' && value[1] == '\0') ||
		    strcasecmp(value, "off") == 0 ||
		    strcasecmp(value, "no") == 0)
			flag = 0;
		else {
			ctx->error(ctx, "bad value: %s", value);
			return (NULL);
		}
	}

	return (options_set_number(oo, oe->name, flag));
}

/* Set a choice option. */
struct options_entry *
cmd_set_option_choice(unused struct cmd *self, struct cmd_ctx *ctx,
    const struct options_table_entry *oe, struct options *oo, const char *value)
{
	const char	**choicep;
	int		  n, choice = -1;

	n = 0;
	for (choicep = oe->choices; *choicep != NULL; choicep++) {
		n++;
		if (strncmp(*choicep, value, strlen(value)) != 0)
			continue;

		if (choice != -1) {
			ctx->error(ctx, "ambiguous value: %s", value);
			return (NULL);
		}
		choice = n - 1;
	}
	if (choice == -1) {
		ctx->error(ctx, "unknown value: %s", value);
		return (NULL);
	}

	return (options_set_number(oo, oe->name, choice));
}