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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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* Stores a Web Map Context (WMC) document as defined by the Open GIS Consortium
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* http://opengis.org and extensions the the WMC.
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*
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* Listeners supported by this model:
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* "refresh" called when window parameters (width/height, bbox) are changed
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* "hidden" called when visibilty of a layer is changed
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*
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* @constructor
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* @base ModelBase
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* @author Cameron Shorter
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* @param modelNode Pointer to the xml node for this model from the config file.
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* @param parent The parent model for the object.
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*
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*/
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function Context(modelNode, parent) {
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// Inherit the ModelBase functions and parameters
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ModelBase.apply(this, new Array(modelNode, parent));
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this.namespace = "xmlns:mb='http://mapbuilder.sourceforge.net/mapbuilder' xmlns:wmc='http://www.opengis.net/context' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'";
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/**
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* Change a Layer's visibility.
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* @param layerName The name of the layer that is to be changed
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* @param hidden String with the value to be set; 1=hidden, 0=visible.
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*/
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this.setHidden=function(layerName, hidden){
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// Set the hidden attribute in the Context
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var hiddenValue = "0";
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if (hidden) hiddenValue = "1";
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var layer=this.doc.selectSingleNode("/wmc:ViewContext/wmc:LayerList/wmc:Layer[wmc:Name='"+layerName+"']");
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if (layer) layer.setAttribute("hidden", hiddenValue);
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// Call the listeners
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this.callListeners("hidden", layerName);
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}
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/**
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* Get the layer's visiblity attribute value.
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* @param layerName The name of the layer that is to be changed
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* @return hidden String with the value; 1=hidden, 0=visible.
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*/
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this.getHidden=function(layerName){
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var hidden=1;
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var layer=this.doc.selectSingleNode("/wmc:ViewContext/wmc:LayerList/wmc:Layer[wmc:Name='"+layerName+"']");
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if (layer) hidden = layer.getAttribute("hidden");
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return hidden;
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}
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/**
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* Get the BoundingBox value from the Context document.
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* @return BoundingBox array with the sequence (xmin,ymin,xmax,ymax).
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*/
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this.getBoundingBox=function() {
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var boundingBox=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:BoundingBox");
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bbox = new Array();
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bbox[0]=parseFloat(boundingBox.getAttribute("minx"));
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bbox[1]=parseFloat(boundingBox.getAttribute("miny"));
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bbox[2]=parseFloat(boundingBox.getAttribute("maxx"));
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bbox[3]=parseFloat(boundingBox.getAttribute("maxy"));
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return bbox;
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}
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/**
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* Set the BoundingBox element and call the refresh listeners
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* @param boundingBox array in the sequence (xmin, ymin, xmax, ymax).
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*/
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this.setBoundingBox=function(boundingBox) {
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// Set BoundingBox in context
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//bbox=this.doc.documentElement.getElementsByTagName("BoundingBox").item(0);
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var bbox=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:BoundingBox");
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bbox.setAttribute("minx", boundingBox[0]);
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bbox.setAttribute("miny", boundingBox[1]);
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bbox.setAttribute("maxx", boundingBox[2]);
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bbox.setAttribute("maxy", boundingBox[3]);
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// Call the listeners
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this.callListeners("bbox", boundingBox);
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}
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/**
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* Set the BoundingBox element and call the refresh listeners
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* @param boundingBox array in the sequence (xmin, ymin, xmax, ymax).
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*/
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this.initBbox=function(objRef) {
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// Set BoundingBox in context from URL CGI params
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if (window.cgiArgs["bbox"]) { //set as minx,miny,maxx,maxy
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var bbox = window.cgiArgs["bbox"].split(',');
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var ul = new Array(parseFloat(bbox[0]),parseFloat(bbox[3]));
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var lr = new Array(parseFloat(bbox[2]),parseFloat(bbox[1]));
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objRef.extent.zoomToBox(ul, lr);
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}
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}
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//PGC this.addListener( "loadModel", this.initBbox, this );
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this.addListener( "contextLoaded", this.initBbox, this );
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/**
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* Set the aoi param and call the refresh listeners
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* @param boundingBox array in the sequence (xmin, ymin, xmax, ymax).
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*/
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this.initAoi=function(objRef) {
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// Set AOI of context from URL CGI params
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if (window.cgiArgs["aoi"]) { //set as ul,lr point arrays
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var aoi = window.cgiArgs["aoi"].split(',');
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objRef.setParam("aoi",new Array(new Array(aoi[0],aoi[3]),new Array(aoi[2],aoi[1])));
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}
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}
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this.addListener( "loadModel", this.initAoi, this );
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//MA this.addListener( "contextLoaded", this.initAoi, this );
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/**
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* Set the Spacial Reference System for the context document.
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* @param srs The Spatial Reference System.
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*/
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this.setSRS=function(srs) {
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var bbox=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:BoundingBox");
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bbox.setAttribute("SRS",srs);
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this.callListeners("srs");
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}
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/**
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* Get the Spacial Reference System from the context document.
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* @return srs The Spatial Reference System.
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*/
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this.getSRS=function() {
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var bbox=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:BoundingBox");
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srs=bbox.getAttribute("SRS");
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return srs;
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}
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/**
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* Get the Window width.
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* @return width The width of map window from the context document
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*/
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this.getWindowWidth=function() {
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var win=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:Window");
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return win.getAttribute("width");
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}
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/**
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* Set the Window width.
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* @param width The width of map window (therefore of map layer images).
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*/
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this.setWindowWidth=function(width) {
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var win=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:Window");
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win.setAttribute("width", width);
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this.callListeners("resize");
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}
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/**
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* Get the Window height.
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* @return height The height of map window from the context document.
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*/
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this.getWindowHeight=function() {
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var win=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:Window");
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return win.getAttribute("height");
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}
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/**
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* Set the Window height.
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* @param height The height of map window to set in the context document
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*/
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this.setWindowHeight=function(height) {
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var win=this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:Window");
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win.setAttribute("height", height);
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this.callListeners("resize");
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}
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/**
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* Returns the serverUrl for the layer passed in as the feature argument.
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* @param requestName ignored for context docs (only GetMap supported)
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* @param method ignored for context docs (only GET supported)
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* @param feature the Layer node from the context doc
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* @return URL for the GetMap request
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*/
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this.getServerUrl = function(requestName, method, feature) {
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return feature.selectSingleNode("wmc:Server/wmc:OnlineResource").getAttribute("xlink:href");
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}
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/**
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* Returns the WMS version for the layer passed in as the feature argument
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* @param feature the Layer node from the context doc
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* @return the WMS GetMap version for the Layer.
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*/
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this.getVersion = function(feature) {
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return feature.selectSingleNode("wmc:Server").getAttribute("version");
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}
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/**
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* Get HTTP method for the specified feature
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* @param feature the Layer node from the context doc
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* @return the HTTP method to get the feature with
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*/
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this.getMethod = function(feature) {
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return feature.selectSingleNode("wmc:Server/wmc:OnlineResource").getAttribute("wmc:method");
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}
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/**
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* Method to get a list of queryable layers
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* @return the list with queryable layers
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*/
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this.getQueryableLayers = function() {
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var listNodeArray = this.doc.selectNodes("/wmc:ViewContext/wmc:LayerList/wmc:Layer[attribute::queryable='1']/wmc:Name");
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return listNodeArray;
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}
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/**
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* Method to get a list of all layers in the context doc
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* TBD: merge this with above, passing queryable as an optional boolean param?
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* @return the list with all layers
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*/
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this.getAllLayers = function() {
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var listNodeArray = this.doc.selectNodes("/wmc:ViewContext/wmc:LayerList/wmc:Layer");
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return listNodeArray;
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}
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/**
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* Method to get a layer with the specified name in the context doc
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* @param layerName the layer to be returned
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* @return the list with all layers
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*/
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this.getLayer = function(layerName) {
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var layer = this.doc.selectSingleNode("/wmc:ViewContext/wmc:LayerList/wmc:Layer[wmc:Name='"+layerName+"']");
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//TBD: add in time stamp
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return layer;
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}
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/**
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* Method to add a Layer to the LayerList
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* @param layerNode the Layer node from another context doc or capabiltiies doc
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*/
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this.addLayer = function(objRef, layerNode) {
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var parentNode = objRef.doc.selectSingleNode("/wmc:ViewContext/wmc:LayerList");
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parentNode.appendChild(layerNode.cloneNode(true));
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objRef.modified = true;
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//objRef.callListeners("refresh");
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}
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this.addFirstListener( "addLayer", this.addLayer, this );
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/**
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* Method to remove a Layer from the LayerList
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* @param layerName the Layer to be deleted
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*/
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this.deleteLayer = function(objRef, layerName) {
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var deletedNode = objRef.getLayer(layerName);
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if (!deletedNode) {
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alert("node note found; unable to delete node:"+layerName);
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return;
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}
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deletedNode.parentNode.removeChild(deletedNode);
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objRef.modified = true;
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}
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this.addFirstListener( "deleteLayer", this.deleteLayer, this );
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/**
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* Method to move a Layer in the LayerList up
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* @param layerName the layer to be moved
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*/
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this.moveLayerUp = function(objRef, layerName) {
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var movedNode = objRef.getLayer(layerName);
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var sibNode = movedNode.selectSingleNode("following-sibling::*");
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if (!sibNode) {
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alert("can't move node past beginning of list:"+layerName);
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return;
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}
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movedNode.parentNode.insertBefore(sibNode,movedNode);
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objRef.modified = true;
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}
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this.addFirstListener( "moveLayerUp", this.moveLayerUp, this );
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/**
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* Method to move a Layer in the LayerList down
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* @param layerName the layer to be moved
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*/
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this.moveLayerDown = function(objRef, layerName) {
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var movedNode = objRef.getLayer(layerName);
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var listNodeArray = movedNode.selectNodes("preceding-sibling::*"); //preceding-sibling axis contains all previous siblings
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var sibNode = listNodeArray[listNodeArray.length-1];
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if (!sibNode) {
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alert("can't move node past beginning of list:"+layerName);
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return;
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}
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movedNode.parentNode.insertBefore(movedNode,sibNode);
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objRef.modified = true;
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}
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this.addFirstListener( "moveLayerDown", this.moveLayerDown, this );
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/**
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* Adds a node to the Context document extension element. The extension element
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* will be created if it doesn't already exist.
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* @param extensionNode the node to be appended in the extension element.
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* @return the ndoe added to the extension element
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*/
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this.setExtension = function(extensionNode) {
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var extension = this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:Extension");
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if (!extension) {
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var general = this.doc.selectSingleNode("/wmc:ViewContext/wmc:General");
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var newChild = createElementWithNS(this.doc,"Extension",'http://www.opengis.net/context');
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extension = general.appendChild(newChild);
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}
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return extension.appendChild(extensionNode);
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}
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/**
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* Returns the contents of the extension element
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* @return the contents of the extension element
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*/
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this.getExtension = function() {
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return this.doc.selectSingleNode("/wmc:ViewContext/wmc:General/wmc:Extension");
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}
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/**
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* Parses a Dimension element from the Context document as a loadModel listener.
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* This results in an XML structure with one element for each GetMap time value
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* parameter and added to the Context extrension element.
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* @param objRef a pointer to this object
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*/
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this.initTimeExtent = function( objRef ) {
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//only the first one selected is used as the timestamp source
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//var extentNode = objRef.doc.selectSingleNode("//wmc:Layer/wmc:Dimension[@name='time']");
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//TBD: how to deal with multiple time dimensions in one context doc, or caps doc?
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var timeNodes = objRef.doc.selectNodes("//wmc:Dimension[@name='time']");
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for (var i=0; i<timeNodes.length; ++i) {
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var extentNode = timeNodes[i];
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objRef.timestampList = createElementWithNS(objRef.doc,"TimestampList",mbNsUrl);
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var layerName = extentNode.parentNode.parentNode.selectSingleNode("wmc:Name").firstChild.nodeValue;
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objRef.timestampList.setAttribute("layerName", layerName);
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//alert("found time dimension, extent:"+extentNode.firstChild.nodeValue);
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var times = extentNode.firstChild.nodeValue.split(","); //comma separated list of arguments
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for (var j=0; j<times.length; ++j) {
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var params = times[j].split("/"); // parses start/end/period
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if (params.length==3) {
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var start = setISODate(params[0]);
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var stop = setISODate(params[1]);
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var period = params[2];
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var parts = period.match(/^P((\d*)Y)?((\d*)M)?((\d*)D)?T?((\d*)H)?((\d*)M)?((.*)S)?/);
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for (var i=1; i<parts.length; ++i) {
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if (!parts[i]) parts[i]=0;
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343
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}
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//alert("start time:"+start.toString());
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345
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do {
|
|
346
|
var timestamp = createElementWithNS(objRef.doc,"Timestamp",mbNsUrl);
|
|
347
|
timestamp.appendChild(objRef.doc.createTextNode(getISODate(start)));
|
|
348
|
objRef.timestampList.appendChild(timestamp);
|
|
349
|
|
|
350
|
start.setFullYear(start.getFullYear()+parseInt(parts[2],10));
|
|
351
|
start.setMonth(start.getMonth()+parseInt(parts[4],10));
|
|
352
|
start.setDate(start.getDate()+parseInt(parts[6],10));
|
|
353
|
start.setHours(start.getHours()+parseInt(parts[8],10));
|
|
354
|
start.setMinutes(start.getMinutes()+parseInt(parts[10],10));
|
|
355
|
start.setSeconds(start.getSeconds()+parseFloat(parts[12]));
|
|
356
|
//alert("time:"+start.toString());
|
|
357
|
} while(start.getTime() <= stop.getTime());
|
|
358
|
|
|
359
|
} else {
|
|
360
|
//output single date value
|
|
361
|
var timestamp = createElementWithNS(objRef.doc,"Timestamp",mbNsUrl);
|
|
362
|
timestamp.appendChild(objRef.doc.createTextNode(times[j]));
|
|
363
|
objRef.timestampList.appendChild(timestamp);
|
|
364
|
}
|
|
365
|
}
|
|
366
|
objRef.setExtension(objRef.timestampList);
|
|
367
|
}
|
|
368
|
}
|
|
369
|
this.addFirstListener( "loadModel", this.initTimeExtent, this );
|
|
370
|
|
|
371
|
/**
|
|
372
|
* Returns the current timestamp value.
|
|
373
|
* @param layerName the name of the Layer from which the timestamp list was generated
|
|
374
|
* @return the current timestamp value.
|
|
375
|
*/
|
|
376
|
this.getCurrentTimestamp = function( layerName ) {
|
|
377
|
var index = this.getParam("timestamp");
|
|
378
|
return this.timestampList.childNodes[index].firstChild.nodeValue;
|
|
379
|
}
|
|
380
|
}
|
|
381
|
|