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/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id$
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*/
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/**
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* The config object is the parent model of all mapbuilder objects.
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* The application creates a global object called 'config' which represents
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* the mapbuilder configuration xml file passed in as a parameter.
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* Config is a model like any other model.
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* Any mapbuilder object can be de-referenced by using the 'config.objects'
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* property as in config.objects.idValueFromConfig.
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* The schema for the config can be found at /mabuilder/lib/schemas/config.xsd
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*
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* @constructor
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* @base ModelBase
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* @author adair
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* @requires Sarissa
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* @param url URL of the configuration file.
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*/
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function Config(url) {
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/**
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* open the application specific configuration document, passed in aas the url argument.
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*/
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this.doc = Sarissa.getDomDocument();
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this.doc.async = false;
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this.doc.validateOnParse=false; //IE6 SP2 parsing bug
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this.doc.load(url);
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if (this.doc.parseError < 0){
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alert("error loading config document: " + url );//+ " - " + Sarissa.getParseErrorText(this.doc) );
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}
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this.url = url;
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this.namespace = "xmlns:mb='"+mbNsUrl+"'";
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this.doc.setProperty("SelectionLanguage", "XPath");
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Sarissa.setXpathNamespaces(this.doc, this.namespace);
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/**
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* Set the serializeUrl and proxyUrl values from a global configuration document
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* Optional, these can also be set in individual config docs.
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*/
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var configDoc = Sarissa.getDomDocument();
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configDoc.async = false;
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configDoc.validateOnParse=false; //IE6 SP2 parsing bug
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configDoc.load(baseDir+"/"+mbServerConfig);
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if (configDoc.parseError < 0) {
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//alert("error loading server config document: " + baseDir+"/"+mbServerConfig );
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} else {
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configDoc.setProperty("SelectionLanguage", "XPath");
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Sarissa.setXpathNamespaces(configDoc, this.namespace);
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var node = configDoc.selectSingleNode("/mb:MapbuilderConfig/mb:proxyUrl");
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if (node) this.proxyUrl = node.firstChild.nodeValue;
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node = configDoc.selectSingleNode("/mb:MapbuilderConfig/mb:serializeUrl");
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if (node) this.serializeUrl = node.firstChild.nodeValue;
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}
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configDoc = null;
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/**
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* Dynamic loading of the javascript files for objects defined in the Config file.
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* @private
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*/
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this.loadConfigScripts=function(){
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// Load script files for all components that don't have <scriptfile> specified
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// in the config file.
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mapbuilder.loadScriptsFromXpath(this.doc.selectNodes("//mb:models/*"),"model/");
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mapbuilder.loadScriptsFromXpath(this.doc.selectNodes("//mb:widgets/*"),"widget/");
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mapbuilder.loadScriptsFromXpath(this.doc.selectNodes("//mb:tools/*"),"tool/");
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//TBD: Deprecate the following block and move into loadScriptsFromXpath instead.
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//load all scriptfiles called for in the config file. There seems to be a
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//problem if this is done anywhere except in the page <HEAD> element.
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var scriptFileNodes = this.doc.selectNodes("//mb:scriptFile");
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for (var i=0; i<scriptFileNodes.length; i++ ) {
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scriptFile = scriptFileNodes[i].firstChild.nodeValue;
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mapbuilder.loadScript(scriptFile);
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}
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}
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/**
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* multilingual support; defaults to english
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* Set via a "language" parameter in the URL,
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* or by setting a global "language" Javascript variable in the page <HEAD>.
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* Retrieve the language value from the global conifg object as "config.lang"
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*/
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this.lang = "en";
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if (window.cgiArgs["language"]) {
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this.lang = window.cgiArgs["language"];
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} else if (window.language) {
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this.lang = window.language;
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}
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//set some global application properties
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var modelNode = this.doc.documentElement;
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this.skinDir = modelNode.selectSingleNode("mb:skinDir").firstChild.nodeValue;
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var proxyUrl = modelNode.selectSingleNode("mb:proxyUrl");
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if (proxyUrl) this.proxyUrl = proxyUrl.firstChild.nodeValue;
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var serializeUrl = modelNode.selectSingleNode("mb:serializeUrl");
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if (serializeUrl) this.serializeUrl = serializeUrl.firstChild.nodeValue;
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var widgetText = modelNode.selectSingleNode("mb:widgetTextUrl");
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if (widgetText) {
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var widgetTextUrl = this.skinDir + "/" + this.lang + "/" + widgetText.firstChild.nodeValue;
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this.widgetText = Sarissa.getDomDocument();
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this.widgetText.async = false;
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this.widgetText.validateOnParse=false; //IE6 SP2 parsing bug
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this.widgetText.load(widgetTextUrl);
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if (this.widgetText.parseError < 0){
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alert("error loading widgetText document: " + widgetTextUrl );//+ " - " + Sarissa.getParseErrorText(this.doc) );
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}
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this.widgetText.setProperty("SelectionLanguage", "XPath");
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Sarissa.setXpathNamespaces(this.widgetText, this.namespace);
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}
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/**
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* the objects property holds a reference to every mapbuilder javascript object
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* created. Each object is added as a property of config.objects using the
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* value of the object id from the configuration file
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*/
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this.objects = new Object();
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// Inherit the ModelBase functions and parameters
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ModelBase.apply(this, new Array(modelNode));
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/**
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* Load a model and its child models, widgets and tools.
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* This function can be called at any time to load a new model or replace an
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* existing model object.
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* @param modelId the id of the model in config XML to be updated
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* @param modelUrl URL of the XML model document to be loaded
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*/
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this.loadModel = function( modelId, modelUrl ) {
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var model = this.objects[modelId];
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if (model && modelUrl) {
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var httpPayload = new Object();
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httpPayload.method = model.method;
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httpPayload.url = modelUrl;
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model.newRequest(model,httpPayload);
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} else {
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alert("config loadModel error:"+modelId+":"+modelUrl);
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}
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}
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/**
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* Repaint the widget passed in.
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* This function can be called at any time to paint the widget.
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* @param widget a pointer to the widget object to be painted.
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*/
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this.paintWidget = function( widget ) {
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if (widget) {
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widget.paint(widget, true);
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} else {
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alert("config paintWidget error: widget does not exist");
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}
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}
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}
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/**
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* Initialise the global config object for Mozilla browsers.
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*/
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if (document.readyState==null){
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// Mozilla
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mapbuilder.setLoadState(MB_LOAD_CONFIG);
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config=new Config(mbConfigUrl);
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config[config.id] = config;
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config.loadConfigScripts();
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}
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