lcdproc/clients/lcdexec/menu.c

/*
 * lcdexec.c
 * This file is part of lcdexec, an LCDproc client.
 *
 * This file is released under the GNU General Public License. Refer to the
 * COPYING file distributed with this package.
 *
 * Copyright (c) 2002, Joris Robijn
 *
 */

#include <stdio.h>
#include <unistd.h>
#include <string.h>

#include "shared/str.h"
#include "shared/report.h"
#include "shared/configfile.h"
#include "shared/sockets.h"

#include "menu.h"

Menu * menu_find_submenu(Menu * menu, char * submenu_id);

Menu * menu_read(char * menu_id, char * progname)
{
	char buf[100];
	char * str;
	char * parts[3];
	int i;

	Menu * menu;

	report(RPT_DEBUG, "Reading menu: [%s]", menu_id);

	menu = malloc(sizeof(Menu));
	menu->num_menucmds = 0;
	menu->num_submenus = 0;

	/* Read the commands */
	str = "";
	while ((str != NULL) && (menu->num_menucmds < MAX_NUM_MENUCMDS)) {

		snprintf(buf, sizeof(buf)-1, "%s%sMenuCommand",
				menu_id, menu_id[0] ? "_" : "");
		buf[sizeof(buf)-1] = 0;
		str = config_get_string(progname, buf, menu->num_menucmds, NULL);
		if (!str) {
			; /* No more menucommands */
		} else {
			char * str2 = strdup(str);
			if (split(str2, ',', parts, 2) == 2) {
				menu->menucmd_name[menu->num_menucmds] = parts[0];
				while (parts[1][0] == ' ') parts[1]++; /* Skip spaces */
				menu->menucmd_exec[menu->num_menucmds] = parts[1];
				report(RPT_DEBUG, "Found command: [%s] [%s]", parts[0], parts[1]);
			} else {
				report(RPT_ERR, "Cannot read MenuCommand: \"%s\"", str);
				return NULL;
			}
			menu->num_menucmds++;
		}
	}

	/* Read the submenus */
	str = "";
	while (str && menu->num_submenus < MAX_NUM_SUBMENUS) {

		snprintf(buf, sizeof(buf)-1, "%s%sSubmenu",
				menu_id, menu_id[0]?"_":"");
		buf[sizeof(buf)-1] = 0;
		str = config_get_string(progname, buf, menu->num_submenus, NULL);
		if (!str) {
			; /* No more submenus */
		} else {
			char * str2 = strdup(str);
			if (split(str2, ',', parts, 2) == 2) {
				menu->submenu_name[menu->num_submenus] = parts[0];
				while (parts[1][0] == ' ') parts[1]++; /* Skip spaces */
				menu->submenu_id[menu->num_submenus] = parts[1];
				report(RPT_DEBUG, "Found submenu: [%s] [%s]", parts[0], parts[1]);
			} else {
				report(RPT_ERR, "Cannot read Submenu: \"%s\"", str);
				return NULL;
			}
			menu->num_submenus++;
		}
	}

	/* And do the same for all submenus */
	for (i = 0; i < menu->num_submenus; i++) {
		menu->submenu[i] = menu_read (menu->submenu_id[i], progname);
	}

	return menu;
}

int menu_send_to_LCDd(Menu * menu, char * id, int sock)
{
	int i;
	char buf[100];

	for (i = 0; i < menu->num_menucmds; i++) {
		snprintf(buf, sizeof(buf)-1,
			"menu_add_item \"%s\" \"%s%s%d\" action \"%s\"\n",
			id, id, id[0]?"_":"", i, menu->menucmd_name[i]);
		buf[sizeof(buf)-1] = '\0';
		if (sock_send_string(sock, buf) < 0)
			return -1;
		snprintf(buf, sizeof(buf)-1,
			"menu_set_item \"%s\" \"%s%s%d\" -menu_result quit\n",
			id, id, id[0]?"_":"", i);
		buf[sizeof(buf)-1] = '\0';
		if (sock_send_string(sock, buf) < 0)
			return -1;
	}
	for (i = 0; i < menu->num_submenus; i++) {
		snprintf(buf, sizeof(buf)-1,
			"menu_add_item \"%s\" \"%s\" menu \"%s\"\n",
			id, menu->submenu_id[i], menu->submenu_name[i]);
		buf[sizeof(buf)-1] = '\0';
		if (sock_send_string(sock, buf) < 0)
			return -1;
	}

	/* And do the same for all submenus */
	for (i = 0; i < menu->num_submenus; i++) {
		if (menu_send_to_LCDd(menu->submenu[i], menu->submenu_id[i], sock) < 0)
			return -1;
	}
	return 0;
}

char * menu_find_cmd_of_id(Menu * menu, char * id)
{
	char * p;
	char * submenu_id;
	char * item_id;
	int i;

	/* Find the submenu_id part of the id */
	submenu_id = strdup(id);
	p = strrchr(submenu_id, '_');

	/* Do we need to search the submenus ? */
	if (p) {
		/* There is a menu id prepended to the id */
		*p = '\0'; /* Crop the submenu_id string */
		item_id = p + 1;
		menu = menu_find_submenu(menu, submenu_id);
		if (!menu) {
			report(RPT_WARNING, "Server reported an unknown id: %s", id);
			free(submenu_id);
			return NULL;
		}
	}
	else {
		item_id = id;
	}

	/* Determine the number at the end of the id */
	i = strtol(item_id, &p, 10);
	if (*item_id != '\0' && *p == '\0'
	&& i >= 0 && i < menu->num_menucmds) {
		/* OK */
		free(submenu_id);
		return menu->menucmd_exec[i];
	} else {
		report(RPT_WARNING, "Server reported an unknown id: %s", id);
		free(submenu_id);
		return NULL;
	}

}

Menu * menu_find_submenu(Menu * menu, char * submenu_id)
{
	int i;
	Menu * found;

	/* Search for the submenu in this menu and all submenus */
	for (i = 0; i < menu->num_submenus; i++) {
		if (strcmp(menu->submenu_id[i], submenu_id) == 0)
			return menu->submenu[i];
		found = menu_find_submenu(menu->submenu[i], submenu_id);
		if (found)
			return found;
	}

	return NULL;
}

int split(char * str, char delim, char * parts[], int maxparts)
/* Splits a string into parts, to which pointers will be returned in &parts.
 * The return value is the number of parts.
 * maxparts is the maximum number of parts returned. If more parts exist
 * they are (unsplit) in the last part.
 * The parts are split at the character delim.
 * No new space will be allocated, the string str will be mutated !
 */
{
	char * p1 = str;
	char * p2;
	int part_nr = 0;

	/* Find the delim char to end the current part */
	while ((part_nr < maxparts - 1) && ((p2 = strchr(p1, delim)) != NULL)) {

		/* subsequent parts... */
		*p2 = '\0';
		parts[part_nr] = p1;

		p1 = p2 + 1; /* Just after the delim char */
		part_nr++;
	}
	/* and the last part... */
	parts[part_nr] = p1;
	part_nr++;

	return part_nr;
}