/*********************************************************************************
 Copyright (c) 2002-2005 Armin Burger
 
 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
 
**********************************************************************************/
/**
 * GENERIC XMLHTTP FUNCTIONS
 */
function AjaxRequest()
{
    var req;
    var xurl;
    var xn;
   
    //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) {
                // processing statements go here
                // alert(req.responseText);
                eval('response = ' + req.responseText);
                method = response.method;
                
                eval(method + '(\'\',' + req.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;
        }

        // Response mode
        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;

        // Load new map image
        loadMapImg(response.mapURL);

        // Check if TOC has to be updated
        var tocStyle = response.tocStyle;
        var refreshToc = eval(response.refreshToc);
        var tocurl = 'toc_tree.php?' + SID + '&action=update';
        updateTocDTree(tocurl, '');

        //alert(document.getElementById('map1').innerHTML);


        // Scale-related activities
        writescale(geo_scale);
        setSlider(geo_scale);
        pMap_setMapScale(geo_scale);

        movecarte = false;
        ResizeEncours = 0;

        // Reference image: set DHTML objects
        setRefBox(rBxL[0], rBxL[1], rBxL[2], rBxL[3]);

        // Hide 'loading' animated GIF
        loadObj.style.visibility = "hidden";
        
        // reset cursor
        setCursor(false);

        // Update SELECT tool OPTIONs in case of 'select' mode
        if (document.varform.mode.value == 'nquery') {
            var selurl = 'select.php?'+ SID + '&activegroup=' + getSelectLayer() ;
            alert("select");
            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; 

        document.getElementById('current_maplink').href = linkhref  */
        //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 loc = window.location;
        var linkhref = loc.protocol + '//' + loc.hostname + loc.port + loc.pathname + '?dg=' + dg + '&me=' + me + '&language=' + gLanguage;
        //document.getElementById('current_maplink').href = linkhref;
      */

    } else {
        // Input mode
        loadObj.style.visibility = "visible";
        var req = new AjaxRequest();
        req.loadXMLDoc(url);
    }   
}



// Ecrit tous les infos du menu (rue,thème,bus)
//_____________________________________________
function writeMenu(tocurl, response) {
    if (response != ''){     
        // Response mode

        var toctreeStr = response.toctree;
        var tocitineraire = response.tocitineraire;
        var defGroups = response.defGroups;
        var tocrues = response.tocrues;
        var menutype = response.menu;

        // Create layer dtree
        d = new dTree('d');
        d.config.useLines = true;
        d.config.useIcons = true;

        var treeRowList = toctreeStr.split('@|@');
        var trl = treeRowList.length;
        for (var r=0; r<trl; r++) {
            var elist = treeRowList[r].split('|');
            d.add(elist[0], elist[1], elist[2], elist[3], elist[4], elist[5], elist[6], elist[7], elist[8], elist[9], elist[10], elist[11]);
        }
        document.getElementById('liste').innerHTML = '<center>aucun objet sélectionné</center>';
        document.getElementById('tree').innerHTML = d;
        document.getElementById('rues').innerHTML = tocrues;
        document.getElementById('itineraire').innerHTML = tocitineraire;
        ActiveDivMenu(document.getElementById('tree').style);

        selectMenu(menutype);

        // Set checkboxes for default groups/layers
        for (var x=0; x<defGroups.length; x++) {
            document.getElementById('laycbx_' + defGroups[x]).checked = true;
        }   

        // Load map
        //zoom2extent(0,0,ext);
        //zoomfullext();
    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    }   
}

//Affiche les informations des boutons en entete
//______________________________________________
function HeaderActive(tocurl, response)
{
    if (response != ''){     
        // Response mode
        var tocinfo = response.tocinfo;
        //alert(tocinfo);
        document.getElementById('Header').innerHTML = tocinfo;
        document.getElementById('Header').style.borderWidth = '1px';
        document.getElementById('Header').style.borderColor = '#FF1206';
        document.getElementById('Header').style.borderStyle='solid';
    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    } 

}

//Affiche les formulaires de gestion d administration
//___________________________________________________
function GestionAdmin(tocurl, response)
{
    if (response != ''){     
        // Response mode
        var tocinfo       = response.tocinfo;
        var tocaction     = response.tocaction;
        var tocformulaire = response.tocformulaire;

        if (!tocformulaire)
        {
            var toctaille = response.toctaille;
            taille=toctaille.split('#');
            document.getElementById('GestionAdminContenu').innerHTML = tocinfo;
            //dd.elements.AjoutTravaux.show();
            sLargeur = parseInt(taille[0]) + 5;
            sHauteur = parseInt(taille[1]) + 5;
            dd.elements.AjoutTravaux.resizeTo(sLargeur,sHauteur);
            dd.elements.AjoutTravaux.hide();
        }
        else
        {
          /* var toc     = document.getElementById('toc');
           var tocT    = objTop(toc);
           var tocL    = objLeft(toc);
           var tocW    = objW(toc);*/
           var toc  = document.getElementById('toc');
           var DivGestion  = document.getElementById('GestionAdminContenu');
           var tocT    = objTop(toc);
           var tocL    = objLeft(toc);
           var DivGestionT    = objTop(DivGestion);

           var MargeT = 4;
           var MargeL = 30;
           var tocimage     = response.tocimage;

           dd.elements.AjoutTravaux.show();
//           dd.elements.AjoutTravaux.moveTo(tocL+tocW-MargeL,tocT+MargeT);
           dd.elements.AjoutTravaux.moveTo(tocL,DivGestionT+tocT+MargeT);
           document.getElementById('ImgLogo').src = tocimage;

           tocimage = "url(\'" + tocimage + "\')";
           document.getElementById('AjoutTravaux').style.backgroundImage = tocimage;
           if (tocaction != 'Autres')
           {
               document.getElementById('FormulaireAjout').innerHTML = tocinfo;
           }
           else
           {
               document.getElementById('NomSousDescription').innerHTML = tocinfo;
           }
        }


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

// Ajoute un enregistrement de le POI
//___________________________________
function MAJShape(tocurl, response)
{
    if (response != ''){   
       var resultat =  response.resultat;
       if (resultat == '0-0')
       {
           var valeur =  response.valeur;
           alert("Enregistrement effectué.");
           reloadMap();
           VideChamps();
       }
       else
       {
           alert("Erreur lors de l enregistrement.");
           //alert(resultat);
       }

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

//Suppression d'un enregistrement dans un fichier shapefield
//__________________________________________________________
function SUPPRShape(tocurl, response)
{
    if (response != ''){   
       var resultat =  response.valeur;

       switch (resultat)
       {
          case "0" : //Rien trouvé
               SupprimerElt();
               break;
          case "1" :
               var tocinfo =  response.tocinfo;
               document.getElementById('GestionAdminContenu').innerHTML = tocinfo;
               break;
          case "2" :
               alert('Elément supprimé.');
               SupprimerElt();
               reloadMap();
               break;
       }


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


// Affiche la liste des rues en fonction de la lettre
//___________________________________________________
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);
    } 
}

// Recherche en fonction du mot saisie
//____________________________________
function chercheTout(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocliste = response.tocliste;
        document.getElementById('liste').innerHTML = tocliste;
        window.document.body.style.cursor="default";

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

// Affiche une bulle info
//_______________________
function chercheInfoBulle(tocurl, response) {
    if (response != ''){     
        // Response mode
        var tocinfo = response.tocinfo;
        var tocmode = response.tocmode;

        if (tocmode=='infobulle')
        {
            if (tocinfo != 'VIDE') ouvreOverlib(tocinfo,"test");
        }
        else
        {
            document.getElementById('detailsuppr').innerHTML = tocinfo;
        }
        //window.document.body.style.cursor="default";
    } else {
        // Input mode
        var req = new AjaxRequest();
        req.loadXMLDoc(tocurl);
    } 
}

// Update L arbre des thèmes
//__________________________
function updateTocDTree(tocurl, response) {
    if (response != ''){     
        // Response mode
        /* UPDATE TOC APPLYING DIFFERENT STYLES TO VISIBLE/NOT-VISIBLE LAYERS*/
        var onLayerStr  = response.onLayers;
        var offLayerStr = response.offLayers;
        var layers = response.layers;

        //Parcours toutes les légendes
        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 == 'sp_' + l) {
                    spanObj.className = layers[l];
                }
            }
        }

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



// Update l arbre des thèmes en flat
//__________________________________
function updateToc(tocurl, response) {
    if (response != ''){     
        // Response mode
        var toc = response.toc;
        document.getElementById('tree').innerHTML = toc;
    } 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);
    }   
}