ea3443c6bc
git-svn-id: http://svn.openlayers.org/trunk/openlayers@8334 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
861 lines
25 KiB
JavaScript
861 lines
25 KiB
JavaScript
/* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD
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* license. See http://svn.openlayers.org/trunk/openlayers/license.txt for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Format/WMC.js
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* @requires OpenLayers/Format/XML.js
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*/
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/**
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* Class: OpenLayers.Format.WMC.v1
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* Superclass for WMC version 1 parsers.
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*
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* Inherits from:
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* - <OpenLayers.Format.XML>
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*/
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OpenLayers.Format.WMC.v1 = OpenLayers.Class(OpenLayers.Format.XML, {
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/**
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* Property: namespaces
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* {Object} Mapping of namespace aliases to namespace URIs.
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*/
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namespaces: {
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ol: "http://openlayers.org/context",
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wmc: "http://www.opengis.net/context",
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sld: "http://www.opengis.net/sld",
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xlink: "http://www.w3.org/1999/xlink",
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xsi: "http://www.w3.org/2001/XMLSchema-instance"
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},
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/**
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* Property: schemaLocation
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* {String} Schema location for a particular minor version.
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*/
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schemaLocation: "",
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/**
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* Method: getNamespacePrefix
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* Get the namespace prefix for a given uri from the <namespaces> object.
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*
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* Returns:
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* {String} A namespace prefix or null if none found.
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*/
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getNamespacePrefix: function(uri) {
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var prefix = null;
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if(uri == null) {
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prefix = this.namespaces[this.defaultPrefix];
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} else {
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for(prefix in this.namespaces) {
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if(this.namespaces[prefix] == uri) {
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break;
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}
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}
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}
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return prefix;
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},
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/**
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* Property: defaultPrefix
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*/
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defaultPrefix: "wmc",
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/**
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* Property: rootPrefix
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* {String} Prefix on the root node that maps to the context namespace URI.
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*/
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rootPrefix: null,
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/**
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* Property: defaultStyleName
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* {String} Style name used if layer has no style param. Default is "".
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*/
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defaultStyleName: "",
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/**
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* Property: defaultStyleTitle
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* {String} Default style title. Default is "Default".
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*/
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defaultStyleTitle: "Default",
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/**
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* Constructor: OpenLayers.Format.WMC.v1
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* Instances of this class are not created directly. Use the
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* <OpenLayers.Format.WMC> constructor instead.
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*
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* Parameters:
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* options - {Object} An optional object whose properties will be set on
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* this instance.
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*/
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initialize: function(options) {
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OpenLayers.Format.XML.prototype.initialize.apply(this, [options]);
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},
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/**
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* Method: read
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* Read capabilities data from a string, and return a list of layers.
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*
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* Parameters:
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* data - {String} or {DOMElement} data to read/parse.
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*
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* Returns:
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* {Array} List of named layers.
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*/
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read: function(data) {
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if(typeof data == "string") {
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data = OpenLayers.Format.XML.prototype.read.apply(this, [data]);
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}
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var root = data.documentElement;
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this.rootPrefix = root.prefix;
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var context = {
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version: root.getAttribute("version")
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};
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this.runChildNodes(context, root);
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return context;
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},
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/**
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* Method: runChildNodes
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*/
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runChildNodes: function(obj, node) {
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var children = node.childNodes;
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var childNode, processor, prefix, local;
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for(var i=0, len=children.length; i<len; ++i) {
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childNode = children[i];
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if(childNode.nodeType == 1) {
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prefix = this.getNamespacePrefix(childNode.namespaceURI);
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local = childNode.nodeName.split(":").pop();
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processor = this["read_" + prefix + "_" + local];
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if(processor) {
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processor.apply(this, [obj, childNode]);
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}
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}
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}
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},
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/**
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* Method: read_wmc_General
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*/
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read_wmc_General: function(context, node) {
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this.runChildNodes(context, node);
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},
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/**
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* Method: read_wmc_BoundingBox
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*/
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read_wmc_BoundingBox: function(context, node) {
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context.projection = node.getAttribute("SRS");
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context.bounds = new OpenLayers.Bounds(
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parseFloat(node.getAttribute("minx")),
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parseFloat(node.getAttribute("miny")),
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parseFloat(node.getAttribute("maxx")),
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parseFloat(node.getAttribute("maxy"))
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);
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},
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/**
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* Method: read_wmc_LayerList
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*/
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read_wmc_LayerList: function(context, node) {
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context.layers = [];
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this.runChildNodes(context, node);
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},
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/**
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* Method: read_wmc_Layer
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*/
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read_wmc_Layer: function(context, node) {
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var layerInfo = {
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params: {},
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options: {
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visibility: (node.getAttribute("hidden") != "1"),
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queryable: (node.getAttribute("queryable") == "1")
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},
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formats: [],
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styles: []
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};
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this.runChildNodes(layerInfo, node);
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// set properties common to multiple objects on layer options/params
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layerInfo.params.layers = layerInfo.name;
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layerInfo.options.maxExtent = layerInfo.maxExtent;
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// create the layer
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var layer = this.getLayerFromInfo(layerInfo);
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context.layers.push(layer);
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},
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/**
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* Method: getLayerFromInfo
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* Create a WMS layer from a layerInfo object.
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*
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* Parameters:
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* layerInfo - {Object} An object representing a WMS layer.
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*
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* Returns:
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* {<OpenLayers.Layer.WMS>} A WMS layer.
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*/
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getLayerFromInfo: function(layerInfo) {
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var options = layerInfo.options;
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if (this.layerOptions) {
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OpenLayers.Util.applyDefaults(options, this.layerOptions);
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}
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var layer = new OpenLayers.Layer.WMS(
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layerInfo.title,
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layerInfo.href,
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layerInfo.params,
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options
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);
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return layer;
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},
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/**
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* Method: read_wmc_Extension
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*/
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read_wmc_Extension: function(obj, node) {
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this.runChildNodes(obj, node);
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},
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/**
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* Method: read_ol_units
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*/
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read_ol_units: function(layerInfo, node) {
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layerInfo.options.units = this.getChildValue(node);
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},
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/**
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* Method: read_ol_maxExtent
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*/
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read_ol_maxExtent: function(obj, node) {
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var bounds = new OpenLayers.Bounds(
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node.getAttribute("minx"), node.getAttribute("miny"),
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node.getAttribute("maxx"), node.getAttribute("maxy")
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);
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obj.maxExtent = bounds;
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},
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/**
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* Method: read_ol_transparent
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*/
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read_ol_transparent: function(layerInfo, node) {
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layerInfo.params.transparent = this.getChildValue(node);
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},
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/**
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* Method: read_ol_numZoomLevels
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*/
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read_ol_numZoomLevels: function(layerInfo, node) {
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layerInfo.options.numZoomLevels = parseInt(this.getChildValue(node));
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},
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/**
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* Method: read_ol_opacity
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*/
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read_ol_opacity: function(layerInfo, node) {
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layerInfo.options.opacity = parseFloat(this.getChildValue(node));
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},
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/**
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* Method: read_ol_singleTile
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*/
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read_ol_singleTile: function(layerInfo, node) {
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layerInfo.options.singleTile = (this.getChildValue(node) == "true");
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},
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/**
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* Method: read_ol_isBaseLayer
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*/
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read_ol_isBaseLayer: function(layerInfo, node) {
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layerInfo.options.isBaseLayer = (this.getChildValue(node) == "true");
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},
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/**
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* Method: read_ol_displayInLayerSwitcher
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*/
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read_ol_displayInLayerSwitcher: function(layerInfo, node) {
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layerInfo.options.displayInLayerSwitcher =
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(this.getChildValue(node) == "true");
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},
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/**
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* Method: read_wmc_Server
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*/
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read_wmc_Server: function(layerInfo, node) {
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layerInfo.params.version = node.getAttribute("version");
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this.runChildNodes(layerInfo, node);
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},
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/**
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* Method: read_wmc_FormatList
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*/
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read_wmc_FormatList: function(layerInfo, node) {
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this.runChildNodes(layerInfo, node);
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},
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/**
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* Method: read_wmc_Format
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*/
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read_wmc_Format: function(layerInfo, node) {
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var format = this.getChildValue(node);
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layerInfo.formats.push(format);
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if(node.getAttribute("current") == "1") {
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layerInfo.params.format = format;
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}
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},
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/**
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* Method: read_wmc_StyleList
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*/
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read_wmc_StyleList: function(layerInfo, node) {
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this.runChildNodes(layerInfo, node);
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},
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/**
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* Method: read_wmc_Style
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*/
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read_wmc_Style: function(layerInfo, node) {
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var style = {};
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this.runChildNodes(style, node);
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if(node.getAttribute("current") == "1") {
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// three style types to consider
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// 1) linked SLD
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// 2) inline SLD
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// 3) named style
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// running child nodes always gets name, optionally gets href or body
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if(style.href) {
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layerInfo.params.sld = style.href;
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} else if(style.body) {
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layerInfo.params.sld_body = style.body;
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} else {
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layerInfo.params.styles = style.name;
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}
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}
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layerInfo.styles.push(style);
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},
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/**
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* Method: read_wmc_SLD
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*/
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read_wmc_SLD: function(style, node) {
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this.runChildNodes(style, node);
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// style either comes back with an href or a body property
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},
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/**
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* Method: read_sld_StyledLayerDescriptor
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*/
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read_sld_StyledLayerDescriptor: function(sld, node) {
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var xml = OpenLayers.Format.XML.prototype.write.apply(this, [node]);
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sld.body = xml;
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},
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/**
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* Method: read_wmc_OnlineResource
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*/
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read_wmc_OnlineResource: function(obj, node) {
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obj.href = this.getAttributeNS(
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node, this.namespaces.xlink, "href"
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);
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},
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/**
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* Method: read_wmc_Name
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*/
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read_wmc_Name: function(obj, node) {
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var name = this.getChildValue(node);
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if(name) {
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obj.name = name;
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}
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},
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/**
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* Method: read_wmc_Title
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*/
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read_wmc_Title: function(obj, node) {
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var title = this.getChildValue(node);
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if(title) {
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obj.title = title;
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}
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},
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/**
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* Method: read_wmc_MetadataURL
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*/
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read_wmc_MetadataURL: function(layerInfo, node) {
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var metadataURL = {};
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var links = node.getElementsByTagName("OnlineResource");
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if(links.length > 0) {
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this.read_wmc_OnlineResource(metadataURL, links[0]);
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}
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layerInfo.options.metadataURL = metadataURL.href;
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},
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/**
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* Method: read_wmc_Abstract
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*/
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read_wmc_Abstract: function(obj, node) {
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var abst = this.getChildValue(node);
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if(abst) {
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obj["abstract"] = abst;
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}
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},
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/**
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* Method: read_wmc_LatLonBoundingBox
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*/
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read_wmc_LatLonBoundingBox: function(layer, node) {
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layer.llbbox = [
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parseFloat(node.getAttribute("minx")),
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parseFloat(node.getAttribute("miny")),
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parseFloat(node.getAttribute("maxx")),
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parseFloat(node.getAttribute("maxy"))
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];
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},
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/**
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* Method: read_wmc_LegendURL
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*/
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read_wmc_LegendURL: function(style, node) {
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var legend = {
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width: node.getAttribute('width'),
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height: node.getAttribute('height')
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};
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var links = node.getElementsByTagName("OnlineResource");
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if(links.length > 0) {
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this.read_wmc_OnlineResource(legend, links[0]);
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}
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style.legend = legend;
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},
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/**
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* Method: write
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*
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* Parameters:
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* context - {Object} An object representing the map context.
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* options - {Object} Optional object.
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*
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* Returns:
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* {String} A WMC document string.
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*/
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write: function(context, options) {
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var root = this.createElementDefaultNS("ViewContext");
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this.setAttributes(root, {
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version: this.VERSION,
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id: (options && typeof options.id == "string") ?
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options.id :
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OpenLayers.Util.createUniqueID("OpenLayers_Context_")
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});
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// add schemaLocation attribute
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this.setAttributeNS(
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root, this.namespaces.xsi,
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"xsi:schemaLocation", this.schemaLocation
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);
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// required General element
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root.appendChild(this.write_wmc_General(context));
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// required LayerList element
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root.appendChild(this.write_wmc_LayerList(context));
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return OpenLayers.Format.XML.prototype.write.apply(this, [root]);
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},
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/**
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* Method: createElementDefaultNS
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* Shorthand for createElementNS with namespace from <defaultPrefix>.
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* Can optionally be used to set attributes and a text child value.
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*
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* Parameters:
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* name - {String} The qualified node name.
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* childValue - {String} Optional value for text child node.
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* attributes - {Object} Optional object representing attributes.
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*
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* Returns:
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* {Element} An element node.
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*/
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createElementDefaultNS: function(name, childValue, attributes) {
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var node = this.createElementNS(
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this.namespaces[this.defaultPrefix],
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name
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);
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if(childValue) {
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node.appendChild(this.createTextNode(childValue));
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}
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if(attributes) {
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this.setAttributes(node, attributes);
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}
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return node;
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},
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/**
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* Method: setAttributes
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* Set multiple attributes given key value pairs from an object.
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*
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* Parameters:
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* node - {Element} An element node.
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* obj - {Object} An object whose properties represent attribute names and
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* values represent attribute values.
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*/
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setAttributes: function(node, obj) {
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var value;
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for(var name in obj) {
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value = obj[name].toString();
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if(value.match(/[A-Z]/)) {
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// safari lowercases attributes with setAttribute
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this.setAttributeNS(node, null, name, value);
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} else {
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node.setAttribute(name, value);
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}
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}
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},
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/**
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* Method: write_wmc_General
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* Create a General node given an context object.
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*
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* Parameters:
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* context - {Object} Context object.
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*
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* Returns:
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* {Element} A WMC General element node.
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*/
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write_wmc_General: function(context) {
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var node = this.createElementDefaultNS("General");
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// optional Window element
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if(context.size) {
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node.appendChild(this.createElementDefaultNS(
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"Window", null,
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{
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width: context.size.w,
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height: context.size.h
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}
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));
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}
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// required BoundingBox element
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var bounds = context.bounds;
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node.appendChild(this.createElementDefaultNS(
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"BoundingBox", null,
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{
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minx: bounds.left.toPrecision(10),
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miny: bounds.bottom.toPrecision(10),
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maxx: bounds.right.toPrecision(10),
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maxy: bounds.top.toPrecision(10),
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SRS: context.projection
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}
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));
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// required Title element
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node.appendChild(this.createElementDefaultNS(
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"Title", context.title
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));
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// OpenLayers specific map properties
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node.appendChild(this.write_ol_MapExtension(context));
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return node;
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},
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/**
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* Method: write_ol_MapExtension
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*/
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write_ol_MapExtension: function(context) {
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var node = this.createElementDefaultNS("Extension");
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var bounds = context.maxExtent;
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if(bounds) {
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var maxExtent = this.createElementNS(
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this.namespaces.ol, "ol:maxExtent"
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);
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this.setAttributes(maxExtent, {
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minx: bounds.left.toPrecision(10),
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miny: bounds.bottom.toPrecision(10),
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maxx: bounds.right.toPrecision(10),
|
|
maxy: bounds.top.toPrecision(10)
|
|
});
|
|
node.appendChild(maxExtent);
|
|
}
|
|
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_LayerList
|
|
* Create a LayerList node given an context object.
|
|
*
|
|
* Parameters:
|
|
* context - {Object} Context object.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC LayerList element node.
|
|
*/
|
|
write_wmc_LayerList: function(context) {
|
|
var list = this.createElementDefaultNS("LayerList");
|
|
|
|
var layer;
|
|
for(var i=0, len=context.layers.length; i<len; ++i) {
|
|
layer = context.layers[i];
|
|
if(layer instanceof OpenLayers.Layer.WMS) {
|
|
list.appendChild(this.write_wmc_Layer(layer));
|
|
}
|
|
}
|
|
|
|
return list;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_Layer
|
|
* Create a Layer node given a layer object.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMS>} Layer object.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC Layer element node.
|
|
*/
|
|
write_wmc_Layer: function(layer) {
|
|
var node = this.createElementDefaultNS(
|
|
"Layer", null, {
|
|
queryable: layer.queryable ? "1" : "0",
|
|
hidden: layer.visibility ? "0" : "1"
|
|
}
|
|
);
|
|
|
|
// required Server element
|
|
node.appendChild(this.write_wmc_Server(layer));
|
|
|
|
// required Name element
|
|
node.appendChild(this.createElementDefaultNS(
|
|
"Name", layer.params["LAYERS"]
|
|
));
|
|
|
|
// required Title element
|
|
node.appendChild(this.createElementDefaultNS(
|
|
"Title", layer.name
|
|
));
|
|
|
|
// optional MetadataURL element
|
|
if (layer.metadataURL) {
|
|
node.appendChild(this.write_wmc_MetadataURL(layer));
|
|
}
|
|
|
|
// optional FormatList element
|
|
node.appendChild(this.write_wmc_FormatList(layer));
|
|
|
|
// optional StyleList element
|
|
node.appendChild(this.write_wmc_StyleList(layer));
|
|
|
|
// OpenLayers specific properties go in an Extension element
|
|
node.appendChild(this.write_wmc_LayerExtension(layer));
|
|
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_LayerExtension
|
|
* Add OpenLayers specific layer parameters to an Extension element.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMS>} A WMS layer.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC Extension element (for a layer).
|
|
*/
|
|
write_wmc_LayerExtension: function(layer) {
|
|
var node = this.createElementDefaultNS("Extension");
|
|
|
|
var bounds = layer.maxExtent;
|
|
var maxExtent = this.createElementNS(
|
|
this.namespaces.ol, "ol:maxExtent"
|
|
);
|
|
this.setAttributes(maxExtent, {
|
|
minx: bounds.left.toPrecision(10),
|
|
miny: bounds.bottom.toPrecision(10),
|
|
maxx: bounds.right.toPrecision(10),
|
|
maxy: bounds.top.toPrecision(10)
|
|
});
|
|
node.appendChild(maxExtent);
|
|
|
|
var param = layer.params["TRANSPARENT"];
|
|
if(param) {
|
|
var trans = this.createElementNS(
|
|
this.namespaces.ol, "ol:transparent"
|
|
);
|
|
trans.appendChild(this.createTextNode(param));
|
|
node.appendChild(trans);
|
|
}
|
|
|
|
var properties = [
|
|
"numZoomLevels", "units", "isBaseLayer",
|
|
"opacity", "displayInLayerSwitcher", "singleTile"
|
|
];
|
|
var child;
|
|
for(var i=0, len=properties.length; i<len; ++i) {
|
|
child = this.createOLPropertyNode(layer, properties[i]);
|
|
if(child) {
|
|
node.appendChild(child);
|
|
}
|
|
}
|
|
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: createOLPropertyNode
|
|
* Create a node representing an OpenLayers property. If the property is
|
|
* null or undefined, null will be returned.
|
|
*
|
|
* Parameters:
|
|
* object - {Object} An object.
|
|
* prop - {String} A property.
|
|
*
|
|
* Returns:
|
|
* {Element} A property node.
|
|
*/
|
|
createOLPropertyNode: function(obj, prop) {
|
|
var node = null;
|
|
if(obj[prop] != null) {
|
|
node = this.createElementNS(this.namespaces.ol, "ol:" + prop);
|
|
node.appendChild(this.createTextNode(obj[prop].toString()));
|
|
}
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_Server
|
|
* Create a Server node given a layer object.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMS>} Layer object.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC Server element node.
|
|
*/
|
|
write_wmc_Server: function(layer) {
|
|
var node = this.createElementDefaultNS("Server");
|
|
this.setAttributes(node, {
|
|
service: "OGC:WMS",
|
|
version: layer.params["VERSION"]
|
|
});
|
|
|
|
// required OnlineResource element
|
|
node.appendChild(this.write_wmc_OnlineResource(layer.url));
|
|
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_MetadataURL
|
|
* Create a MetadataURL node given a layer object.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMS>} Layer object.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC metadataURL element node.
|
|
*/
|
|
write_wmc_MetadataURL: function(layer) {
|
|
var node = this.createElementDefaultNS("MetadataURL");
|
|
|
|
// required OnlineResource element
|
|
node.appendChild(this.write_wmc_OnlineResource(layer.metadataURL));
|
|
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_FormatList
|
|
* Create a FormatList node given a layer.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMS>} Layer object.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC FormatList element node.
|
|
*/
|
|
write_wmc_FormatList: function(layer) {
|
|
var node = this.createElementDefaultNS("FormatList");
|
|
node.appendChild(this.createElementDefaultNS(
|
|
"Format", layer.params["FORMAT"], {current: "1"}
|
|
));
|
|
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_StyleList
|
|
* Create a StyleList node given a layer.
|
|
*
|
|
* Parameters:
|
|
* layer - {<OpenLayers.Layer.WMS>} Layer object.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC StyleList element node.
|
|
*/
|
|
write_wmc_StyleList: function(layer) {
|
|
var node = this.createElementDefaultNS("StyleList");
|
|
var style = this.createElementDefaultNS(
|
|
"Style", null, {current: "1"}
|
|
);
|
|
|
|
// Style can come from one of three places (prioritized as below):
|
|
// 1) an SLD parameter
|
|
// 2) and SLD_BODY parameter
|
|
// 3) the STYLES parameter
|
|
|
|
if(layer.params["SLD"]) {
|
|
// create link from SLD parameter
|
|
var sld = this.createElementDefaultNS("SLD");
|
|
var link = this.write_wmc_OnlineResource(layer.params["SLD"]);
|
|
sld.appendChild(link);
|
|
style.appendChild(sld);
|
|
} else if(layer.params["SLD_BODY"]) {
|
|
// include sld fragment from SLD_BODY parameter
|
|
var sld = this.createElementDefaultNS("SLD");
|
|
var body = layer.params["SLD_BODY"];
|
|
// read in body as xml doc - assume proper namespace declarations
|
|
var doc = OpenLayers.Format.XML.prototype.read.apply(this, [body]);
|
|
// append to StyledLayerDescriptor node
|
|
var imported = doc.documentElement;
|
|
if(sld.ownerDocument && sld.ownerDocument.importNode) {
|
|
imported = sld.ownerDocument.importNode(imported, true);
|
|
}
|
|
sld.appendChild(imported);
|
|
style.appendChild(sld);
|
|
} else {
|
|
// use name(s) from STYLES parameter
|
|
var name = layer.params["STYLES"] ?
|
|
layer.params["STYLES"] : this.defaultStyleName;
|
|
|
|
style.appendChild(this.createElementDefaultNS("Name", name));
|
|
style.appendChild(this.createElementDefaultNS(
|
|
"Title", this.defaultStyleTitle
|
|
));
|
|
}
|
|
node.appendChild(style);
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: write_wmc_OnlineResource
|
|
* Create an OnlineResource node given a URL.
|
|
*
|
|
* Parameters:
|
|
* href - {String} URL for the resource.
|
|
*
|
|
* Returns:
|
|
* {Element} A WMC OnlineResource element node.
|
|
*/
|
|
write_wmc_OnlineResource: function(href) {
|
|
var node = this.createElementDefaultNS("OnlineResource");
|
|
this.setAttributeNS(node, this.namespaces.xlink, "xlink:type", "simple");
|
|
this.setAttributeNS(node, this.namespaces.xlink, "xlink:href", href);
|
|
return node;
|
|
},
|
|
|
|
CLASS_NAME: "OpenLayers.Format.WMC.v1"
|
|
|
|
});
|