/*********************************************************************************
 Copyright (c) 2002-2005 Armin Burger
 Copyright (c) 2005-2006 GEOSIGNAL - www.geosignal.fr - contact@geosignal.fr

 
 Permission is hereby granted, free of charge, to any person obtaining 
 a copy of this software and associated documentation files (the "Software"), 
 to deal in the Software without restriction, including without limitation 
 the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 and/or sell copies of the Software, and to permit persons to whom the Software 
 is furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included 
 in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 
 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR OR 
 COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 
 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 --------------------------------------------------------------------------------
 
 EXAMPLES FOR XMLHTTP TAKEN FROM DREW MCLELLAN ON
 http://www.xml.com/pub/a/2005/02/09/xml-http-request.html
 with additional ideas/concepts from 
 Chirp Internet: www.chirp.com.au
 
**********************************************************************************/
var xn = 0;
var maploading = false;
var mapImgPos = [];
var withCrossfade = false;

/**
 * GENERIC XMLHTTP FUNCTIONS
 */
function AjaxRequest()
{
    var req;
    var xurl;
   
    //var method = "GET";
    //var nocache = true;
    
    this.loadXMLDoc = function(url) 
    {
        xurl = url;
        // branch for native XMLHttpRequest object
        if (window.XMLHttpRequest) {
            try {
                req = new XMLHttpRequest();
            } catch(e) {
                req = false;
            }
        // branch for IE/Windows ActiveX version
        } else if (window.ActiveXObject) {
            try {
                req = new ActiveXObject("Msxml2.XMLHTTP");
            } catch(e) {
                try {
                    req = new ActiveXObject("Microsoft.XMLHTTP");
                } catch(e) {
                    req = false;
                }
            }
        }
        
        if (req) {
            req.onreadystatechange = processReqChange;
            //alert(url);
            // avoid caching by adding arbitrary values
            //url += '&zxyq=' + (new Date()).getTime();
            //url = "x_load.php?&mapW=540&mapH=400&zoom_type=zoompoint";
        req.open("GET", url, true);

            // headers to avoid caching 
            req.setRequestHeader('If-Modified-Since', 'Sat, 1 Jan 2000 00:00:00 GMT');
            req.setRequestHeader("Cache-Control", "no-cache, must-revalidate, private, pre-check=0, post-check=0, max-age=0");
            req.setRequestHeader("Pragma", "no-cache");
            
            req.send(null);
        }
    }
    
    
    var processReqChange = function()
    {
        // only if req shows "complete"
        if (req.readyState == 4) {
            // only if "OK"
            if (req.status == 200) {
                var responseText = req.responseText;
                
                // Pour le debug, le texte a afficher doit etre encadre par <DEBUG> et </DEBUG>
/*                
                var buffer = "";
                var debut  = responseText.indexOf("<DEBUG>");
                while (debut >= 0) {
                	var fin      = responseText.indexOf("</DEBUG>", debut);
                	var msg      = responseText.substring(debut + 7, fin);
                	responseText = responseText.substring(0, debut) + responseText.substring(fin + 8);
                	debut        = responseText.indexOf("<DEBUG>");
                	buffer += msg + "\n";
                } 
                if(buffer != "") { alert(buffer); }

if(responseText.indexOf("tocHTML")>=0){
alert(responseText);
}
*/

                // processing statements go here
                // alert(req.responseText);
                eval('response = ' + responseText);
                method = response.method;

                eval(method + '(\'\',' + responseText + ')');
                
            } else {
                if (xn < 4) {
                    xn++;
                    //alert(xn);
                    this.loadXMLDoc(xurl);
                    //var reqn = new AjaxRequest();   
                    //reqn.loadXMLDoc(xurl);
                } else {
                    //alert("There was a problem retrieving the data:\n" + req.statusText);
                }
            }
        }
    }
}



/*==================================================================================================*/


/**
 * P.MAPPER-RELATED XMLHTTP FUNCTIONS
 */

// For loading/updating the MAP
function updateMap(url, response) {
    var loadObj = document.getElementById("loading");

    if (response != '') {     
        // Response mode
        // Reload application when PHP session expired
        var sessionerror = response.sessionerror;
        if (sessionerror == 'true') {
           errormsg = localeList['sessionExpired']; 
           alert(errormsg);
           window.location.reload();
           return false;
        }
        
        // Test for resize update (for IE)
        if (response.resizeupdate == 'true') {
            loadObj.style.visibility = "hidden";
            return false;
        }
        
        var rBxL = response.refBoxStr.split(',');
        //var refW = response.refW;
        //var refH = response.refH;
        minx_geo = parseFloat(response.minx_geo);
        maxy_geo = parseFloat(response.maxy_geo);
        xdelta_geo = parseFloat(response.xdelta_geo);
        ydelta_geo = parseFloat(response.ydelta_geo);
        var geo_scale = response.geo_scale;
        var urlPntStr = response.urlPntStr;

		var mapImgList = ["mapBgImg", "mapImg"];
		for(var i = 0; i < mapImgList.length; i++) {
			if(typeof mapImgPos[mapImgList[i]] == "undefined") {
				var obj = document.getElementById(mapImgList[i]);
				mapImgPos[mapImgList[i]] = [getRealPosition(obj, 'x'), getRealPosition(obj, 'y')];
			}
		}

		// Load new map image
		if(withCrossfade == false) {
			preloadImg(response.mapBackgroundURL, response.mapURL, function() { 
				loadMapImg("mapBgImg", response.mapBackgroundURL, "mapImg", response.mapURL); 
			} );
		} else {
			preloadImg(response.mapBackgroundURL, response.mapURL, function() { 
				loadMapImg2("mapBgImg", response.mapBackgroundURL, getOpacityValue("mapBgImg"), mapImgPos["mapBgImg"], "mapImg", response.mapURL, getOpacityValue("mapImg"), mapImgPos["mapImg"], 3);
				withCrossfade = false;
			} );			
		}
        
        // Check if TOC has to be updated
        var tocStyle = response.tocStyle;
        var refreshToc = eval(response.refreshToc);
        refreshToc = true;
        if (refreshToc) {
            var tocurl = 'x_toc_update.php?' + SID;
            updateTocScale(tocurl, '');
        }
        
        
        // Scale-related activities
        writescale(geo_scale);
        setSlider(geo_scale);
        pMap_setMapScale(geo_scale);
        
        
        // Reference image: set DHTML objects
        setRefBox(rBxL[0], rBxL[1], rBxL[2], rBxL[3]);
        
        // reset cursor
        setCursor(false);
        
        // Update SELECT tool OPTIONs in case of 'select' mode
        if (document.varform.mode.value == 'nquery') {
            var selurl = 'x_select.php?'+ SID + '&activegroup=' + getSelectLayer() ;
            updateSelectTool(selurl, '');
        }
        
        
        //Update map link
        var dg = getLayers();
        var maxx_geo = xdelta_geo + minx_geo;
        var miny_geo = maxy_geo - ydelta_geo;
        var me = minx_geo + ',' + miny_geo + ',' + maxx_geo + ',' + maxy_geo;
        var confpar = config.length > 0 ? '&config=' + config : '';
        var urlPntStrPar = urlPntStr.length > 1 ? '&up=' + urlPntStr : '';
        var loc = window.location;
        var linkhref = loc.protocol + '//' + loc.hostname + loc.port + loc.pathname + '?dg=' + dg + '&me=' + me + '&language=' + gLanguage + confpar + urlPntStrPar; 

		if(document.getElementById('current_maplink') != null) {
            document.getElementById('current_maplink').href = linkhref;
        }
         
    } else {
        // Input mode
        //if (maploading == false) {
            maploading = true;
            loadObj.style.visibility = "visible";
            var req = new AjaxRequest();   
            req.loadXMLDoc(url);
        //}
    }   
}

// Write the Menu //
function writeTocMenu(tocurl, response) {

    if (response != ''){     
        // Response mode
        var tocrues = response.tocrues;
		var tocrechercheavancee = response.tocrechercheavancee;
        var menutype = response.menu;

        document.getElementById('rues').innerHTML = tocrues;
		document.getElementById('recherche').innerHTML = tocrechercheavancee;
        ActiveDivMenu('recherche');

        selectMenu(menutype);

    } else {
        // Input mode
            var req = new AjaxRequest();
            req.loadXMLDoc(tocurl);
    }
}

// Ecrire ds la DIV Rue //
function chercheRues(tocurl, response) {
    if (response != ''){
        // Response mode
        var tocrues = response.tocrues;
        document.getElementById('rues').innerHTML = tocrues;

    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    } 
}

// Charge la liste des numeros de parcelle d'une section //
function chercheNumParcelle(tocurl, response) {
	var select = document.getElementById("parcelleNumero");		

    if (response != ''){
        // Response mode
        var tocNumParcelle = response.tocnumparcelle;
		select.options.length = 0;
		select.options.add(new Option("--Numéro de parcelle--", ""));
		if(tocNumParcelle != "") {
			var arrParcelle = tocNumParcelle.split('|');
			for(var i = 0; i < arrParcelle.length; i++) {
				var arr = arrParcelle[i].split('#');
				select.options.add(new Option(arr[0], arr[1]));
			}
		}
    } else {
        // Input mode
        var req = new AjaxRequest();
		select.options.length = 0;
		select.options.add(new Option("...", ""));		
        req.loadXMLDoc(tocurl);
    } 
}

// Charge la liste des noms de voirie commençant par une lettre donnee //
function chercheNomVoirie(tocurl, response) {
	var select = document.getElementById("voirieNom");		

  if (response != ''){
    // Response mode
    var tocVoirieNom = response.tocvoirienom;
    var arrData = tocVoirieNom.split('@');
    var lettre = arrData[0];
		select.options.length = 0;
		select.options.add(new Option("--Nom de voirie débutant par "+lettre+"--", ""));
		if(arrData[1] != "") {
			var arrVoirie = arrData[1].split('|');
			for(var i = 0; i < arrVoirie.length; i++) {
				var arr = arrVoirie[i].split('#');
				select.options.add(new Option(arr[0], arr[1]));
			}		
		}
  } else {
    // Input mode
    var req = new AjaxRequest();
		select.options.length = 0;
		select.options.add(new Option("...", ""));
		select = document.getElementById("voirieNum");
		select.options.length = 0
		select.options.add(new Option("--N°--", ""));
    req.loadXMLDoc(tocurl);
  } 
}

// Charge la liste des numeros d'une rue //
function chercheNumVoirie(tocurl, response) {
	var select = document.getElementById("voirieNum");

    if (response != ''){
        // Response mode
        var tocVoirieNum = response.tocvoirienum;
		select.options.length = 0;
		select.options.add(new Option("--N°--", ""));
		if(tocVoirieNum != "") {
			var arrVoirie = tocVoirieNum.split('|');
			for(var i = 0; i < arrVoirie.length; i++) {
				var arr = arrVoirie[i].split('#');
				select.options.add(new Option(arr[0], arr[1]));
			}		
		}
    } else {
        // Input mode
        var req = new AjaxRequest();
		select.options.length = 0;
		select.options.add(new Option("...", ""));
        req.loadXMLDoc(tocurl);
    } 
}

// Ecrire ds la DIV Liste //
function chercheTout(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocliste = response.tocliste;
        document.getElementById('liste').innerHTML = tocliste;
        //zoom2scale(document.scaleform.scale.value);
        window.document.body.style.cursor="default";
    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    } 
}

// Ecrire ds la DIV infos //
function chercheInfo(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocinfo = response.tocinfo;
        document.getElementById('infos').innerHTML = tocinfo;
        //zoom2scale(document.scaleform.scale.value);
        window.document.body.style.cursor="default";
    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    } 
}

// Ecrire ds la DIV infos //
function chercheInfoBulle(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocinfo = response.tocinfo;
        if (tocinfo != 'VIDE') ouvreOverlibMap(tocinfo);
        //zoom2scale(document.scaleform.scale.value);
        window.document.body.style.cursor="default";

    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    } 
}

// Update the TOC //
function updateToc(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocHTML = response.tocHTML;
        //alert(tocHTML);        
        document.getElementById('tree').innerHTML = tocHTML;
        legendContainer.legTxt = tocHTML;
        
        var tocurl = 'x_toc_update.php?' + SID;
        //window.setTimeout("updateTocScale(tocurl, ''))", 300);
        updateTocScale(tocurl, '');
        
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(tocurl);
    }   
}


// Update the TOC //
function updateTocScale(tocurl, response) {
    // Response mode
    if (response != '') {
        /* UPDATE TOC APPLYING DIFFERENT STYLES TO VISIBLE/NOT-VISIBLE LAYERS*/
        var layers = response.layers;
        
        for (var l in layers) {
            var spanList = document.getElementsByTagName('span');
            var sl = spanList.length;
            for (var s=0; s<sl; s++) {
                var spanObj = spanList[s]; 
                if (spanObj.id == 'spxg_' + l) {
                    spanObj.className = layers[l];
                }
            }
        }
        
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(tocurl);
    }   
}



// Show legend over MAP //
function showMapLegend(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocHTML = response.tocHTML;
        //alert(tocHTML);
        var legDiv = document.getElementById('maplegend');
        legDiv.innerHTML = tocHTML;
        legDiv.style.visibility = 'visible';
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(tocurl);
    }   
}


// Swap from TOC to LEGEND view //
function swapLegend(tocurl, response) {
    //alert(tocurl);
    if (response != ''){     
        // Response mode
        var tocHTML = response.tocHTML;
        var legDiv = document.getElementById('toclegend');
        var tocDiv = document.getElementById('tree');
        tocDiv.innerHTML = tocHTML;
        //legDiv.style.visibility = 'visible';
        //tocDiv.style.visibility = 'hidden';
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(tocurl);
    }   
}



// For SELECT tool //
function updateSelectTool(selurl, response) {
    if (response != ''){     
        // Response mode
        var selStr = response.selStr;
        document.getElementById('bottomMapFrame').innerHTML = selStr;
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(selurl);
    }   
}


function updateSelLayers(mapurl, response) {
    if (response != ''){     
        // Response mode
        var sellayers = response.sellayers;
        
        // Update SELECT tool OPTIONs in case of 'select' mode
        if (document.varform.mode.value == 'nquery') {
            var selurl = 'select.php?'+ SID + '&activegroup=' + getSelectLayer() ;
            updateSelectTool(selurl, '');
        }
        
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(mapurl);
    }
}



function digitizePoint(digitizeurl, response) {
    if (response != ''){     
        // Response mode
        var txt = response.retvalue;
        //alert(txt);
        changeLayersDraw();
        
        
    } else {
        // Input mode
        var req = new AjaxRequest();   
        req.loadXMLDoc(digitizeurl);
    }
}