b020e0279a
git-svn-id: http://svn.openlayers.org/trunk/openlayers@8269 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
924 lines
34 KiB
JavaScript
924 lines
34 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/Rule.js
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* @requires OpenLayers/Filter.js
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* @requires OpenLayers/Filter/FeatureId.js
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* @requires OpenLayers/Filter/Logical.js
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* @requires OpenLayers/Filter/Comparison.js
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* @requires OpenLayers/Format/SLD.js
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* @requires OpenLayers/Format/Filter/v1.js
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*/
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/**
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* Class: OpenLayers.Format.SLD.v1
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* Superclass for SLD 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.SLD.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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sld: "http://www.opengis.net/sld",
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ogc: "http://www.opengis.net/ogc",
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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: defaultPrefix
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*/
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defaultPrefix: "sld",
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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: null,
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/**
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* APIProperty: defaultSymbolizer.
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* {Object} A symbolizer with the SLD defaults.
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*/
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defaultSymbolizer: {
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fillColor: "#808080",
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fillOpacity: 1,
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strokeColor: "#000000",
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strokeOpacity: 1,
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strokeWidth: 1,
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strokeDashstyle: "solid",
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pointRadius: 3,
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graphicName: "square"
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},
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/**
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* Constructor: OpenLayers.Format.SLD.v1
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* Instances of this class are not created directly. Use the
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* <OpenLayers.Format.SLD> 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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// extend with ogc:Filter readers and writers
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this.readers["ogc"] = OpenLayers.Format.Filter.v1.prototype.readers["ogc"];
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this.writers["ogc"] = OpenLayers.Format.Filter.v1.prototype.writers["ogc"];
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// extend with custom filter methods that may get changed
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this.readOgcExpression = OpenLayers.Format.Filter.v1.prototype.readOgcExpression;
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this.getFilterType = OpenLayers.Format.Filter.v1.prototype.getFilterType;
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this.filterMap = OpenLayers.Format.Filter.v1.prototype.filterMap;
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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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*
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* Parameters:
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* data - {DOMElement} An SLD document element.
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*
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* Returns:
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* {Object} An object representing the SLD.
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*/
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read: function(data) {
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var sld = {
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namedLayers: {}
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};
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this.readChildNodes(data, sld);
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return sld;
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},
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/**
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* Property: readers
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* Contains public functions, grouped by namespace prefix, that will
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* be applied when a namespaced node is found matching the function
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* name. The function will be applied in the scope of this parser
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* with two arguments: the node being read and a context object passed
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* from the parent.
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*/
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readers: {
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"sld": {
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"StyledLayerDescriptor": function(node, sld) {
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sld.version = node.getAttribute("version");
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this.readChildNodes(node, sld);
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},
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"Name": function(node, obj) {
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obj.name = this.getChildValue(node);
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},
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"Title": function(node, obj) {
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obj.title = this.getChildValue(node);
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},
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"Abstract": function(node, obj) {
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obj.description = this.getChildValue(node);
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},
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"NamedLayer": function(node, sld) {
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var layer = {
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userStyles: [],
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namedStyles: []
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};
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this.readChildNodes(node, layer);
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// give each of the user styles this layer name
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for(var i=0, len=layer.userStyles.length; i<len; ++i) {
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layer.userStyles[i].layerName = layer.name;
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}
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sld.namedLayers[layer.name] = layer;
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},
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"NamedStyle": function(node, layer) {
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layer.namedStyles.push(
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this.getChildName(node.firstChild)
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);
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},
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"UserStyle": function(node, layer) {
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var style = new OpenLayers.Style(this.defaultSymbolizer);
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this.readChildNodes(node, style);
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layer.userStyles.push(style);
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},
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"IsDefault": function(node, style) {
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if(this.getChildValue(node) == "1") {
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style.isDefault = true;
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}
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},
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"FeatureTypeStyle": function(node, style) {
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// OpenLayers doesn't have a place for FeatureTypeStyle
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// Name, Title, Abstract, FeatureTypeName, or
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// SemanticTypeIdentifier so, we make a temporary object
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// and later just use the Rule(s).
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var obj = {
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rules: []
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};
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this.readChildNodes(node, obj);
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style.rules = obj.rules;
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},
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"Rule": function(node, obj) {
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var rule = new OpenLayers.Rule();
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this.readChildNodes(node, rule);
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obj.rules.push(rule);
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},
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"ElseFilter": function(node, rule) {
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rule.elseFilter = true;
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},
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"MinScaleDenominator": function(node, rule) {
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rule.minScaleDenominator = this.getChildValue(node);
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},
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"MaxScaleDenominator": function(node, rule) {
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rule.maxScaleDenominator = this.getChildValue(node);
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},
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"LineSymbolizer": function(node, rule) {
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// OpenLayers doens't do painter's order, instead we extend
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var symbolizer = rule.symbolizer["Line"] || {};
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this.readChildNodes(node, symbolizer);
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// in case it didn't exist before
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rule.symbolizer["Line"] = symbolizer;
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},
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"PolygonSymbolizer": function(node, rule) {
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// OpenLayers doens't do painter's order, instead we extend
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var symbolizer = rule.symbolizer["Polygon"] || {};
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this.readChildNodes(node, symbolizer);
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// in case it didn't exist before
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rule.symbolizer["Polygon"] = symbolizer;
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},
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"PointSymbolizer": function(node, rule) {
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// OpenLayers doens't do painter's order, instead we extend
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var symbolizer = rule.symbolizer["Point"] || {};
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this.readChildNodes(node, symbolizer);
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// in case it didn't exist before
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rule.symbolizer["Point"] = symbolizer;
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},
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"Stroke": function(node, symbolizer) {
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this.readChildNodes(node, symbolizer);
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},
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"Fill": function(node, symbolizer) {
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this.readChildNodes(node, symbolizer);
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},
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"CssParameter": function(node, symbolizer) {
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var cssProperty = node.getAttribute("name");
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var symProperty = this.cssMap[cssProperty];
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if(symProperty) {
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// Limited support for parsing of OGC expressions
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var value = this.readOgcExpression(node);
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// always string, could be an empty string
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if(value) {
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symbolizer[symProperty] = value;
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}
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}
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},
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"Graphic": function(node, symbolizer) {
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var graphic = {};
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// painter's order not respected here, clobber previous with next
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this.readChildNodes(node, graphic);
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// directly properties with names that match symbolizer properties
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var properties = [
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"strokeColor", "strokeWidth", "strokeOpacity",
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"strokeLinecap", "fillColor", "fillOpacity",
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"graphicName", "rotation", "graphicFormat"
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];
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var prop, value;
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for(var i=0, len=properties.length; i<len; ++i) {
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prop = properties[i];
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value = graphic[prop];
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if(value != undefined) {
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symbolizer[prop] = value;
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}
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}
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// set other generic properties with specific graphic property names
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if(graphic.opacity != undefined) {
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symbolizer.graphicOpacity = graphic.opacity;
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}
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if(graphic.size != undefined) {
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symbolizer.pointRadius = graphic.size / 2;
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}
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if(graphic.href != undefined) {
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symbolizer.externalGraphic = graphic.href;
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}
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if(graphic.rotation != undefined) {
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symbolizer.rotation = graphic.rotation;
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}
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},
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"ExternalGraphic": function(node, graphic) {
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this.readChildNodes(node, graphic);
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},
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"Mark": function(node, graphic) {
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this.readChildNodes(node, graphic);
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},
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"WellKnownName": function(node, graphic) {
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graphic.graphicName = this.getChildValue(node);
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},
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"Opacity": function(node, obj) {
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// No support for parsing of OGC expressions
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var opacity = this.getChildValue(node);
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// always string, could be empty string
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if(opacity) {
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obj.opacity = opacity;
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}
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},
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"Size": function(node, obj) {
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// No support for parsing of OGC expressions
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var size = this.getChildValue(node);
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// always string, could be empty string
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if(size) {
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obj.size = size;
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}
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},
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"Rotation": function(node, obj) {
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// No support for parsing of OGC expressions
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var rotation = this.getChildValue(node);
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// always string, could be empty string
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if(rotation) {
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obj.rotation = rotation;
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}
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},
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"OnlineResource": function(node, obj) {
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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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"Format": function(node, graphic) {
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graphic.graphicFormat = this.getChildValue(node);
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}
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}
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},
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/**
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* Property: cssMap
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* {Object} Object mapping supported css property names to OpenLayers
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* symbolizer property names.
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*/
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cssMap: {
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"stroke": "strokeColor",
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"stroke-opacity": "strokeOpacity",
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"stroke-width": "strokeWidth",
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"stroke-linecap": "strokeLinecap",
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"stroke-dasharray": "strokeDashstyle",
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"fill": "fillColor",
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"fill-opacity": "fillOpacity",
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"font-family": "fontFamily",
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"font-size": "fontSize"
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},
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/**
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* Method: getCssProperty
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* Given a symbolizer property, get the corresponding CSS property
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* from the <cssMap>.
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*
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* Parameters:
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* sym - {String} A symbolizer property name.
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*
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* Returns:
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* {String} A CSS property name or null if none found.
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*/
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getCssProperty: function(sym) {
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var css = null;
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for(var prop in this.cssMap) {
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if(this.cssMap[prop] == sym) {
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css = prop;
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break;
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}
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}
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return css;
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},
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/**
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* Method: getGraphicFormat
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* Given a href for an external graphic, try to determine the mime-type.
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* This method doesn't try too hard, and will fall back to
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* <defautlGraphicFormat> if one of the known <graphicFormats> is not
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* the file extension of the provided href.
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*
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* Parameters:
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* href - {String}
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*
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* Returns:
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* {String} The graphic format.
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*/
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getGraphicFormat: function(href) {
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var format, regex;
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for(var key in this.graphicFormats) {
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if(this.graphicFormats[key].test(href)) {
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format = key;
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break;
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}
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}
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return format || this.defautlGraphicFormat;
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},
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/**
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* Property: defaultGraphicFormat
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* {String} If none other can be determined from <getGraphicFormat>, this
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* default will be returned.
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*/
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defaultGraphicFormat: "image/png",
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/**
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* Property: graphicFormats
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* {Object} Mapping of image mime-types to regular extensions matching
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* well-known file extensions.
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*/
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graphicFormats: {
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"image/jpeg": /\.jpe?g$/i,
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"image/gif": /\.gif$/i,
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"image/png": /\.png$/i
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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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* sld - {Object} An object representing the SLD.
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*
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* Returns:
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* {DOMElement} The root of an SLD document.
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*/
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write: function(sld) {
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return this.writers.sld.StyledLayerDescriptor.apply(this, [sld]);
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},
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/**
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* Property: writers
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* As a compliment to the readers property, this structure contains public
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* writing functions grouped by namespace alias and named like the
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* node names they produce.
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*/
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writers: {
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"sld": {
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"StyledLayerDescriptor": function(sld) {
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var root = this.createElementNSPlus(
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"StyledLayerDescriptor",
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{attributes: {
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"version": this.VERSION,
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"xsi:schemaLocation": this.schemaLocation
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}}
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);
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// add in optional name
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if(sld.name) {
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this.writeNode(root, "Name", sld.name);
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}
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// add in optional title
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if(sld.title) {
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this.writeNode(root, "Title", sld.title);
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}
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// add in optional description
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if(sld.description) {
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this.writeNode(root, "Abstract", sld.description);
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}
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// add in named layers
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for(var name in sld.namedLayers) {
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this.writeNode(root, "NamedLayer", sld.namedLayers[name]);
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}
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return root;
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},
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"Name": function(name) {
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return this.createElementNSPlus("Name", {value: name});
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},
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"Title": function(title) {
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return this.createElementNSPlus("Title", {value: title});
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},
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"Abstract": function(description) {
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return this.createElementNSPlus(
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"Abstract", {value: description}
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);
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},
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"NamedLayer": function(layer) {
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var node = this.createElementNSPlus("NamedLayer");
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// add in required name
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this.writeNode(node, "Name", layer.name);
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// optional sld:LayerFeatureConstraints here
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// add in named styles
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if(layer.namedStyles) {
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for(var i=0, len=layer.namedStyles.length; i<len; ++i) {
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this.writeNode(
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node, "NamedStyle", layer.namedStyles[i]
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);
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}
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}
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// add in user styles
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if(layer.userStyles) {
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for(var i=0, len=layer.userStyles.length; i<len; ++i) {
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this.writeNode(
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node, "UserStyle", layer.userStyles[i]
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);
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}
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}
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return node;
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},
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"NamedStyle": function(name) {
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var node = this.createElementNSPlus("NamedStyle");
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this.writeNode(node, "Name", name);
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return node;
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},
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"UserStyle": function(style) {
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var node = this.createElementNSPlus("UserStyle");
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// add in optional name
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if(style.name) {
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this.writeNode(node, "Name", style.name);
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}
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// add in optional title
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if(style.title) {
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this.writeNode(node, "Title", style.title);
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}
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// add in optional description
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if(style.description) {
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this.writeNode(node, "Abstract", style.description);
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}
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// add isdefault
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if(style.isDefault) {
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this.writeNode(node, "IsDefault", style.isDefault);
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}
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// add FeatureTypeStyles
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this.writeNode(node, "FeatureTypeStyle", style);
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return node;
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},
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"IsDefault": function(bool) {
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return this.createElementNSPlus(
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"IsDefault", {value: (bool) ? "1" : "0"}
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);
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},
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"FeatureTypeStyle": function(style) {
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var node = this.createElementNSPlus("FeatureTypeStyle");
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// OpenLayers currently stores no Name, Title, Abstract,
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// FeatureTypeName, or SemanticTypeIdentifier information
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// related to FeatureTypeStyle
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// add in rules
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for(var i=0, len=style.rules.length; i<len; ++i) {
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this.writeNode(node, "Rule", style.rules[i]);
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}
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return node;
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},
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"Rule": function(rule) {
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var node = this.createElementNSPlus("Rule");
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// add in optional name
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if(rule.name) {
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this.writeNode(node, "Name", rule.name);
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}
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// add in optional title
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if(rule.title) {
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this.writeNode(node, "Title", rule.title);
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}
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// add in optional description
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if(rule.description) {
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this.writeNode(node, "Abstract", rule.description);
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}
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// add in LegendGraphic here
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// add in optional filters
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if(rule.elseFilter) {
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this.writeNode(node, "ElseFilter");
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} else if(rule.filter) {
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this.writeNode(node, "ogc:Filter", rule.filter);
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}
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// add in scale limits
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if(rule.minScaleDenominator != undefined) {
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this.writeNode(
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node, "MinScaleDenominator", rule.minScaleDenominator
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);
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}
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if(rule.maxScaleDenominator != undefined) {
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this.writeNode(
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node, "MaxScaleDenominator", rule.maxScaleDenominator
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);
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}
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|
|
// add in symbolizers (relies on geometry type keys)
|
|
var types = OpenLayers.Style.SYMBOLIZER_PREFIXES;
|
|
var type, symbolizer;
|
|
for(var i=0, len=types.length; i<len; ++i) {
|
|
type = types[i];
|
|
symbolizer = rule.symbolizer[type];
|
|
if(symbolizer) {
|
|
this.writeNode(
|
|
node, type + "Symbolizer", symbolizer
|
|
);
|
|
}
|
|
}
|
|
return node;
|
|
|
|
},
|
|
"ElseFilter": function() {
|
|
return this.createElementNSPlus("ElseFilter");
|
|
},
|
|
"MinScaleDenominator": function(scale) {
|
|
return this.createElementNSPlus(
|
|
"MinScaleDenominator", {value: scale}
|
|
);
|
|
},
|
|
"MaxScaleDenominator": function(scale) {
|
|
return this.createElementNSPlus(
|
|
"MaxScaleDenominator", {value: scale}
|
|
);
|
|
},
|
|
"LineSymbolizer": function(symbolizer) {
|
|
var node = this.createElementNSPlus("LineSymbolizer");
|
|
this.writeNode(node, "Stroke", symbolizer);
|
|
return node;
|
|
},
|
|
"Stroke": function(symbolizer) {
|
|
var node = this.createElementNSPlus("Stroke");
|
|
|
|
// GraphicFill here
|
|
// GraphicStroke here
|
|
|
|
// add in CssParameters
|
|
if(symbolizer.strokeColor != undefined) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "strokeColor"}
|
|
);
|
|
}
|
|
if(symbolizer.strokeOpacity != undefined) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "strokeOpacity"}
|
|
);
|
|
}
|
|
if(symbolizer.strokeWidth != undefined) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "strokeWidth"}
|
|
);
|
|
}
|
|
return node;
|
|
},
|
|
"CssParameter": function(obj) {
|
|
// not handling ogc:expressions for now
|
|
return this.createElementNSPlus("CssParameter", {
|
|
attributes: {name: this.getCssProperty(obj.key)},
|
|
value: obj.symbolizer[obj.key]
|
|
});
|
|
},
|
|
"TextSymbolizer": function(symbolizer) {
|
|
var node = this.createElementNSPlus("TextSymbolizer");
|
|
// add in optional Label
|
|
if(symbolizer.label != null) {
|
|
this.writeNode(node, "Label", symbolizer.label);
|
|
}
|
|
// add in optional Font
|
|
if(symbolizer.fontFamily != null ||
|
|
symbolizer.fontSize != null) {
|
|
this.writeNode(node, "Font", symbolizer);
|
|
}
|
|
// add in optional Fill
|
|
if(symbolizer.fillColor != null ||
|
|
symbolizer.fillOpacity != null) {
|
|
this.writeNode(node, "Fill", symbolizer);
|
|
}
|
|
return node;
|
|
},
|
|
"Font": function(symbolizer) {
|
|
var node = this.createElementNSPlus("Font");
|
|
// add in CssParameters
|
|
if(symbolizer.fontFamily) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "fontFamily"}
|
|
);
|
|
}
|
|
if(symbolizer.fontSize) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "fontSize"}
|
|
);
|
|
}
|
|
return node;
|
|
},
|
|
"Label": function(label) {
|
|
// only the simplest of ogc:expression handled
|
|
// {label: "some text and a ${propertyName}"}
|
|
var node = this.createElementNSPlus("Label");
|
|
var tokens = label.split("${");
|
|
node.appendChild(this.createTextNode(tokens[0]));
|
|
var item, last;
|
|
for(var i=1, len=tokens.length; i<len; i++) {
|
|
item = tokens[i];
|
|
last = item.indexOf("}");
|
|
if(last > 0) {
|
|
this.writeNode(
|
|
node, "ogc:PropertyName",
|
|
{property: item.substring(0, last)}
|
|
);
|
|
node.appendChild(
|
|
this.createTextNode(item.substring(++last))
|
|
);
|
|
} else {
|
|
// no ending }, so this is a literal ${
|
|
node.appendChild(
|
|
this.createTextNode("${" + item)
|
|
);
|
|
}
|
|
}
|
|
return node;
|
|
},
|
|
"PolygonSymbolizer": function(symbolizer) {
|
|
var node = this.createElementNSPlus("PolygonSymbolizer");
|
|
this.writeNode(node, "Fill", symbolizer);
|
|
this.writeNode(node, "Stroke", symbolizer);
|
|
return node;
|
|
},
|
|
"Fill": function(symbolizer) {
|
|
var node = this.createElementNSPlus("Fill");
|
|
|
|
// GraphicFill here
|
|
|
|
// add in CssParameters
|
|
if(symbolizer.fillColor) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "fillColor"}
|
|
);
|
|
}
|
|
if(symbolizer.fillOpacity) {
|
|
this.writeNode(
|
|
node, "CssParameter",
|
|
{symbolizer: symbolizer, key: "fillOpacity"}
|
|
);
|
|
}
|
|
return node;
|
|
},
|
|
"PointSymbolizer": function(symbolizer) {
|
|
var node = this.createElementNSPlus("PointSymbolizer");
|
|
this.writeNode(node, "Graphic", symbolizer);
|
|
return node;
|
|
},
|
|
"Graphic": function(symbolizer) {
|
|
var node = this.createElementNSPlus("Graphic");
|
|
if(symbolizer.externalGraphic != undefined) {
|
|
this.writeNode(node, "ExternalGraphic", symbolizer);
|
|
} else if(symbolizer.graphicName) {
|
|
this.writeNode(node, "Mark", symbolizer);
|
|
}
|
|
|
|
if(symbolizer.graphicOpacity != undefined) {
|
|
this.writeNode(node, "Opacity", symbolizer.graphicOpacity);
|
|
}
|
|
if(symbolizer.pointRadius != undefined) {
|
|
this.writeNode(node, "Size", symbolizer.pointRadius * 2);
|
|
}
|
|
if(symbolizer.rotation != undefined) {
|
|
this.writeNode(node, "Rotation", symbolizer.rotation);
|
|
}
|
|
return node;
|
|
},
|
|
"ExternalGraphic": function(symbolizer) {
|
|
var node = this.createElementNSPlus("ExternalGraphic");
|
|
this.writeNode(
|
|
node, "OnlineResource", symbolizer.externalGraphic
|
|
);
|
|
var format = symbolizer.graphicFormat ||
|
|
this.getGraphicFormat(symbolizer.externalGraphic);
|
|
this.writeNode(node, "Format", format);
|
|
return node;
|
|
},
|
|
"Mark": function(symbolizer) {
|
|
var node = this.createElementNSPlus("Mark");
|
|
this.writeNode(node, "WellKnownName", symbolizer.graphicName);
|
|
this.writeNode(node, "Fill", symbolizer);
|
|
this.writeNode(node, "Stroke", symbolizer);
|
|
return node;
|
|
},
|
|
"WellKnownName": function(name) {
|
|
return this.createElementNSPlus("WellKnownName", {
|
|
value: name
|
|
});
|
|
},
|
|
"Opacity": function(value) {
|
|
return this.createElementNSPlus("Opacity", {
|
|
value: value
|
|
});
|
|
},
|
|
"Size": function(value) {
|
|
return this.createElementNSPlus("Size", {
|
|
value: value
|
|
});
|
|
},
|
|
"Rotation": function(value) {
|
|
return this.createElementNSPlus("Rotation", {
|
|
value: value
|
|
});
|
|
},
|
|
"OnlineResource": function(href) {
|
|
return this.createElementNSPlus("OnlineResource", {
|
|
attributes: {
|
|
"xlink:type": "simple",
|
|
"xlink:href": href
|
|
}
|
|
});
|
|
},
|
|
"Format": function(format) {
|
|
return this.createElementNSPlus("Format", {
|
|
value: format
|
|
});
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Methods below this point are of general use for versioned XML parsers.
|
|
* These are candidates for an abstract class.
|
|
*/
|
|
|
|
/**
|
|
* Method: getNamespacePrefix
|
|
* Get the namespace prefix for a given uri from the <namespaces> object.
|
|
*
|
|
* Returns:
|
|
* {String} A namespace prefix or null if none found.
|
|
*/
|
|
getNamespacePrefix: function(uri) {
|
|
var prefix = null;
|
|
if(uri == null) {
|
|
prefix = this.namespaces[this.defaultPrefix];
|
|
} else {
|
|
var gotPrefix = false;
|
|
for(prefix in this.namespaces) {
|
|
if(this.namespaces[prefix] == uri) {
|
|
gotPrefix = true;
|
|
break;
|
|
}
|
|
}
|
|
if(!gotPrefix) {
|
|
prefix = null;
|
|
}
|
|
}
|
|
return prefix;
|
|
},
|
|
|
|
|
|
/**
|
|
* Method: readChildNodes
|
|
*/
|
|
readChildNodes: function(node, obj) {
|
|
var children = node.childNodes;
|
|
var child, group, reader, prefix, local;
|
|
for(var i=0, len=children.length; i<len; ++i) {
|
|
child = children[i];
|
|
if(child.nodeType == 1) {
|
|
prefix = this.getNamespacePrefix(child.namespaceURI);
|
|
local = child.nodeName.split(":").pop();
|
|
group = this.readers[prefix];
|
|
if(group) {
|
|
reader = group[local];
|
|
if(reader) {
|
|
reader.apply(this, [child, obj]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Method: writeNode
|
|
* Shorthand for applying one of the named writers and appending the
|
|
* results to a node. If a qualified name is not provided for the
|
|
* second argument (and a local name is used instead), the namespace
|
|
* of the parent node will be assumed.
|
|
*
|
|
* Parameters:
|
|
* parent - {DOMElement} Result will be appended to this node.
|
|
* name - {String} The name of a node to generate. If a qualified name
|
|
* (e.g. "pre:Name") is used, the namespace prefix is assumed to be
|
|
* in the <writers> group. If a local name is used (e.g. "Name") then
|
|
* the namespace of the parent is assumed.
|
|
* obj - {Object} Structure containing data for the writer.
|
|
*
|
|
* Returns:
|
|
* {DOMElement} The child node.
|
|
*/
|
|
writeNode: function(parent, name, obj) {
|
|
var prefix, local;
|
|
var split = name.indexOf(":");
|
|
if(split > 0) {
|
|
prefix = name.substring(0, split);
|
|
local = name.substring(split + 1);
|
|
} else {
|
|
prefix = this.getNamespacePrefix(parent.namespaceURI);
|
|
local = name;
|
|
}
|
|
var child = this.writers[prefix][local].apply(this, [obj]);
|
|
parent.appendChild(child);
|
|
return child;
|
|
},
|
|
|
|
/**
|
|
* Method: createElementNSPlus
|
|
* Shorthand for creating namespaced elements with optional attributes and
|
|
* child text nodes.
|
|
*
|
|
* Parameters:
|
|
* name - {String} The qualified node name.
|
|
* options - {Object} Optional object for node configuration.
|
|
*
|
|
* Returns:
|
|
* {Element} An element node.
|
|
*/
|
|
createElementNSPlus: function(name, options) {
|
|
options = options || {};
|
|
var loc = name.indexOf(":");
|
|
// order of prefix preference
|
|
// 1. in the uri option
|
|
// 2. in the prefix option
|
|
// 3. in the qualified name
|
|
// 4. from the defaultPrefix
|
|
var uri = options.uri || this.namespaces[options.prefix];
|
|
if(!uri) {
|
|
loc = name.indexOf(":");
|
|
uri = this.namespaces[name.substring(0, loc)];
|
|
}
|
|
if(!uri) {
|
|
uri = this.namespaces[this.defaultPrefix];
|
|
}
|
|
var node = this.createElementNS(uri, name);
|
|
if(options.attributes) {
|
|
this.setAttributes(node, options.attributes);
|
|
}
|
|
if(options.value) {
|
|
node.appendChild(this.createTextNode(options.value));
|
|
}
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* Method: setAttributes
|
|
* Set multiple attributes given key value pairs from an object.
|
|
*
|
|
* Parameters:
|
|
* node - {Element} An element node.
|
|
* obj - {Object || Array} An object whose properties represent attribute
|
|
* names and values represent attribute values. If an attribute name
|
|
* is a qualified name ("prefix:local"), the prefix will be looked up
|
|
* in the parsers {namespaces} object. If the prefix is found,
|
|
* setAttributeNS will be used instead of setAttribute.
|
|
*/
|
|
setAttributes: function(node, obj) {
|
|
var value, loc, alias, uri;
|
|
for(var name in obj) {
|
|
value = obj[name].toString();
|
|
// check for qualified attribute name ("prefix:local")
|
|
uri = this.namespaces[name.substring(0, name.indexOf(":"))] || null;
|
|
this.setAttributeNS(node, uri, name, value);
|
|
}
|
|
},
|
|
|
|
CLASS_NAME: "OpenLayers.Format.SLD.v1"
|
|
|
|
});
|