// Special thanks to: Kevin Reed http://www.tnetweather.com
// Special thanks to: Pinto http://www.joske-online.be
// Pinto got me going on this (but doesn't know!)
//
// 10 March 2009 script to process Cumulus realtime data in XML
// (http://sandaysoft.com)
//
// (c) S.M.Blinkhorn 2009
//
// ****************************************************************
// Version 1.3 - 1 April 2009
// ****************************************************************
// 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
// of the License, 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.
// ****************************************************************
// History
//
// Version 1.0 Initial release
// Version 1.1 Added hidden input fields to expose the values of interval,
// realtimeinterval and the various observation units for use
// within the document DOM. These are populated during
// the first call to loadXMLDoc and are available to the
// document.onload event.
// Version 1.2 Checks whether browser is IE x or not and uses
// document.onreadystatechange to wait for the DOM to be
// fully loaded before launching the XML reader loop.
// This fixes a problem where the page was not fully
// populated on the first pass through the loop.
// No other browser seems to need this delay.
// And no other browser supports document.readystate.
// Ho Hum...
// It is still not possible to use
// to call initialize because of the twin constraints of
// Symbian not handling global vars properly and not being
// able to pass parameters to the onreadystatechange function.
// Maybe one day...
// Version 1.3 Cleaned up the set_ajax_obs function to eliminate
// the very very occasional 'object is null' error and to
// very very slightly improve the inner loop efficiency
// ****************************************************************
//
function initialize(xmlfile,loop) {
// ****************************************************************
// initialize - call this from javascript
// takes 2 optional parameters
// xmlfile - names the xml file to read
// defaults to cumulus.xml in the CWD
// loop - specifies the loop time in seconds
// defaults to 15 seconds
// a multiplier of 10 is applied if the browser is Symbian
// a value of 0 disables the looping.
// The XML file will be parsed once.
//
// Other stuff you might want to change:
// FlashTime - the document stores a value of 0 for the flashtime.
// Try setting it to about 0.75 (seconds) if you really must have
// the text changing colour when it is updated. (It has some use
// in debugging, but cosmetically I hate it.)
// FlashColour - specifies the colour used for the annoying flash.
// ****************************************************************
var FlashTime = 0; // seconds, 0 disables, try 0.75 if you must
var FlashColour = '#00FF00'; // Green
// ----------------------------------------------------------------
var x = navigator;
document.write('');
document.getElementById("appCodeName").value=x.appCodeName;
document.getElementById("appMinorVersion").value=x.appMinorVersion;
document.getElementById("appName").value=x.appName;
document.getElementById("appVersion").value=x.appVersion;
document.getElementById("cookieEnabled").value=x.cookieEnabled;
document.getElementById("cpuClass").value=x.cpuClass;
document.getElementById("onLine").value=x.onLine;
document.getElementById("platform").value=x.platform;
document.getElementById("useragent").value=x.userAgent;
document.getElementById("browserLanguage").value=x.browserLanguage;
document.getElementById("systemLanguage").value=x.systemLanguage;
document.getElementById("userLanguage").value=x.userLanguage;
// document.write('
');
// document.write("
");
// document.write("
");
// document.write("
");
// document.write("
");
// document.write("
");
// document.write("
");
// document.write("
");
if(xmlfile==undefined) xmlfile='cumulus.xml';
document.getElementById("xmlfile").value=xmlfile;
document.getElementById("flashtime").value=FlashTime;
document.getElementById("flashcolour").value=FlashColour;
document.getElementById("gotstatics").value=0;
if(loop==undefined) loop='15';
document.getElementById("loop").value=loop;
var symbian = new RegExp("symbian","i");
if (symbian.test(x.userAgent)) {
document.getElementById("timeout").value=Math.min(loop*10,900); // seconds, capped @ 15 mins
} else {
document.getElementById("timeout").value=loop; // seconds
}
// uncomment the next line to switch off the loop
// document.getElementById("timeout").value=0;
var IE = new RegExp("MSIE","i");
if (IE.test(x.userAgent)) {
document.onreadystatechange=fnStartInit;
} else {
loadXMLDoc(document.getElementById("xmlfile").value+'?'+Math.random());
}
}
function fnStartInit() {
if (document.readyState=="complete") {
loadXMLDoc(document.getElementById("xmlfile").value+'?'+Math.random());
}
}
function loadXMLDoc(url) {
xmlDoc=GetXmlHttpObject();
if (xmlDoc!=null) {
xmlDoc.onreadystatechange=state_Change;
xmlDoc.open("GET",url,true);
xmlDoc.send(null);
timeout=document.getElementById("timeout").value;
flashtime=document.getElementById("flashtime").value;
// alert(flashtime);
if(timeout!=0) setTimeout("loadXMLDoc(document.getElementById('xmlfile').value+'?'+Math.random())",timeout*1000);
if(flashtime!=0) setTimeout("reset_ajax_color()",flashtime*1000);
} else {
alert("Your browser does not support XMLHTTP.");
return;
}
}
function GetXmlHttpObject() {
var xmlHttp=null;
try {
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e) {
// Internet Explorer
try {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
}
return xmlHttp;
}
function state_Change() {
if (xmlDoc.readyState==4) {// 4 = "loaded"
if (xmlDoc.status==200) {// 200 = OK
// alert("loaded OK");
if(document.getElementById("gotstatics").value==0) {
getNamedElement("interval");
getNamedElement("realtimeinterval");
getNamedElement("tempunit");
getNamedElement("pressunit");
getNamedElement("rainunit");
getNamedElement("windunit");
getNamedElement("windrununit");
document.getElementById("gotstatics").value=1;
}
set_ajax_obs();
} else {
alert("Problem retrieving XML data");
}
}
}
function set_ajax_obs() {
// get a handle to the XML document
var x=xmlDoc.responseXML.documentElement;
if(x!=null) { // xml doc was NOT modified while we were parsing it
// set up some constants before we go loopy
var flashtime=document.getElementById("flashtime").value;
var flashcolour=document.getElementById("flashcolour").value;
var pattern=new RegExp("_"); // mask used to ignore the ajax element 'unique-ifier'
// get a list of all the XML elements
var items=x.getElementsByTagName("item")
var numitems=items.length;
// get a list of all the 'ajax' elements in the document
elements=getElementsByClass("span","ajax");
var numelements=elements.length;
// here we go loop-de-loop...
for (var i=0;i!=numitems;i++) { // step through each XML element
var xid=items.item(i).attributes.getNamedItem("name"); // get the name of the XML element
for (var index=0;index!=numelements;index++) { // and look for it in the 'ajax' elements list
var ajx=elements[index];
var aid=ajx.attributes.getNamedItem("id");
if(xid.value==aid.value.split(pattern)[0]) { // we found a match, let's go strike it!
var cls=x.getElementsByTagName("class")[i].childNodes[0];
var val=x.getElementsByTagName("value")[i].childNodes[0];
if(val) { // if there is a stored value then use it
val=val.nodeValue;
} else { // insert something (nothing) to display
val="";
}
lastval = ajx.getAttribute("lastval");
if(cls.nodeValue=='static' && lastval!=null) break; // it's a static, it won't change - go get another
if(val==lastval) break; // it's not changed since last time - go get another
ajx.setAttribute("lastval",val);
var unt=x.getElementsByTagName("unit")[i].childNodes[0];
if(unt) { // if there is a unit defined in the XML then tack it on
unt=unt.nodeValue;
} else {
unt="";
}
ajx.innerHTML=val + unt; // and write the xml element into the document
switch(val)
{
case "Waxing Gibbous":
document.getElementById('moonphaseimage').innerHTML='
';
break;
case "Full moon":
document.getElementById('moonphaseimage').innerHTML='';
break;
case "New moon":
document.getElementById('moonphaseimage').innerHTML='';
break;
case "Waning Gibbous":
document.getElementById('moonphaseimage').innerHTML='';
break;
case "Waxing Cresent":
document.getElementById('moonphaseimage').innerHTML='';
break;
case "Waning Cresent":
document.getElementById('moonphaseimage').innerHTML='';
break;
case "First Quarter":
document.getElementById('moonphaseimage').innerHTML='';
break;
case "Last Quarter":
document.getElementById('moonphaseimage').innerHTML='';
break;
}
//document.getElementById('currenttime').innerHTML=currentTime.getHours() + ':' + currentTime.getMinutes();
if(flashtime!=0) ajx.style.color=flashcolour;
}
}
}
}
}
function getElementsByClass(tag, targetclass) {
var arr = new Array();
var elem = document.getElementsByTagName(tag);
var numelem = elem.length;
for(i = 0,iarr = 0; i != numelem; i++) {
x = elem[i].getAttributeNode('class');
if(x!=null) {
att = x.nodeValue;
if(att == targetclass) {
arr[iarr] = elem[i];
iarr++;
}
}
}
return arr;
}
function reset_ajax_color( ) {
// reset all the styles to have no colour override
elements = getElementsByClass("span","ajax");
numelements = elements.length;
for (var index=0;index!=numelements;index++) {
element = elements[index];
element.style.color='';
}
}
function getNamedElement(element) {
// get a list of all the XML elements
var x=xmlDoc.responseXML.documentElement;
var items=x.getElementsByTagName("item")
var numitems=items.length;
// off we go...
for (var i=0;i!=numitems;i++) { // step through each XML element
var xid=items.item(i).attributes.getNamedItem("name"); // get the name of the XML element
if(xid.value==element) { // we found a match, let's go strike it!
var val=x.getElementsByTagName("value")[i].childNodes[0];
if(val) { // if there is a stored value then use it
val=val.nodeValue;
} else { // insert something (nothing) to display
val="";
}
document.getElementById(element).value=val;
break; // and stop looking ('cos we found it already)
}
}
}