<?php
# $Id$
# http://www.mapbender.org/index.php/Back
# Copyright (C) 2002 CCGIS 
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

require_once(dirname(__FILE__)."/../php/mb_validatePermission.php");

echo "var mod_back_map = '".$e_target[0]."';";
echo "var mod_back_overview = '".$e_target[1]."';";

?>
var mb_MapHistoryObj = new Array();
var mod_back_img_off = new Image(); mod_back_img_off.src = "<?php  echo preg_replace("/_off_disabled/","_off",$e_src);  ?>";
var mod_back_img_off_disabled = new Image(); mod_back_img_off_disabled.src = "<?php  echo $e_src;  ?>";
var mod_back_img_over = new Image(); mod_back_img_over.src = "<?php  echo preg_replace("/_off_disabled/","_over",$e_src);  ?>";
var mod_back_img_previous = null;
var mod_back_cnt = -1;

mb_registerSubFunctions("mb_setHistoryObj(frameName)");
mb_registerSubFunctions("mod_back_check(frameName)");

function mod_back_check(frameName){
	if(frameName == mod_back_map){
		mod_back_cnt++;
		if(mb_MapHistoryObj[mod_back_map].length > 1){
			document.getElementById("back").src =  mod_back_img_off.src;
		}
		else{
			document.getElementById("back").src =  mod_back_img_off_disabled.src;
			mod_back_img_previous = document.getElementById("back").src;
		}
	}
}
function mod_back_over(obj){
	mod_back_img_previous = document.getElementById("back").src;
	if(document.getElementById("back").src ==  mod_back_img_off.src){
		document.getElementById("back").src = mod_back_img_over.src;
	}
}

function mod_back_out(obj){
	document.getElementById("back").src  = mod_back_img_previous;
}

function mod_back_set(){
	if(mod_back_img_previous ==  mod_back_img_off.src){
		if(mb_MapFutureObj){
			mb_setFutureObj(mod_back_map);
		}
		var ind = getMapObjIndexByName(mod_back_map);
		var cnt = mb_MapHistoryObj[mod_back_map].length - 2;
		if(mb_mapObj[ind].epsg != mb_MapHistoryObj[mod_back_map][cnt].epsg){
			var oind = getMapObjIndexByName(mod_back_overview);
			for(var i=0; i < mb_MapHistoryObj[mod_back_overview].length; i++){
				if(mb_MapHistoryObj[mod_back_overview][i].epsg == mb_MapHistoryObj[mod_back_map][cnt].epsg){
					mb_mapObj[oind].epsg = mb_MapHistoryObj[mod_back_overview][i].epsg;
					mb_mapObj[oind].extent = mb_MapHistoryObj[mod_back_overview][i].extent;
					setMapRequest(mod_back_overview);
					break;
				}
			}
		}
		document.getElementById(mod_back_map).style.width = mb_MapHistoryObj[mod_back_map][cnt].width;
		document.getElementById(mod_back_map).style.height = mb_MapHistoryObj[mod_back_map][cnt].height;     
		mb_mapObj[ind].width = mb_MapHistoryObj[mod_back_map][cnt].width;
		mb_mapObj[ind].height = mb_MapHistoryObj[mod_back_map][cnt].height;     
		mb_mapObj[ind].epsg = mb_MapHistoryObj[mod_back_map][cnt].epsg;
		mb_mapObj[ind].extent = mb_MapHistoryObj[mod_back_map][cnt].extent;
		mb_mapObj[ind].layers = mb_MapHistoryObj[mod_back_map][cnt].layers;
		mb_mapObj[ind].styles = mb_MapHistoryObj[mod_back_map][cnt].styles;
		mb_mapObj[ind].querylayers = mb_MapHistoryObj[mod_back_map][cnt].querylayers;
		mb_MapHistoryObj[mod_back_map].length = (mb_MapHistoryObj[mod_back_map].length - 2);
		setMapRequest(mod_back_map);
	}
}
function mb_setHistoryObj(frameName){
	if(mb_MapHistoryObj[frameName] == null){
		mb_MapHistoryObj[frameName] = new Array();
	}
	var ind = getMapObjIndexByName(frameName);
	var cnt = mb_MapHistoryObj[frameName].length;
	mb_MapHistoryObj[frameName][cnt] = new Object();
	mb_MapHistoryObj[frameName][cnt].width = mb_mapObj[ind].width;
	mb_MapHistoryObj[frameName][cnt].height = mb_mapObj[ind].height;
	mb_MapHistoryObj[frameName][cnt].epsg = mb_mapObj[ind].epsg;
	mb_MapHistoryObj[frameName][cnt].extent = mb_mapObj[ind].extent;
	mb_MapHistoryObj[frameName][cnt].layers = new Array();
	for(var i=0; i<mb_mapObj[ind].layers.length;i++){
		mb_MapHistoryObj[frameName][cnt].layers[i] = mb_mapObj[ind].layers[i];
	}
	mb_MapHistoryObj[frameName][cnt].styles = new Array();
	for(var i=0; i<mb_mapObj[ind].styles.length;i++){
		mb_MapHistoryObj[frameName][cnt].styles[i] = mb_mapObj[ind].styles[i];
	}
	mb_MapHistoryObj[frameName][cnt].querylayers = new Array();
	for(var i=0; i<mb_mapObj[ind].querylayers.length;i++){
		mb_MapHistoryObj[frameName][cnt].querylayers[i] = mb_mapObj[ind].querylayers[i];
	}
}