[76] | 1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
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| 2 | * full list of contributors). Published under the Clear BSD license. |
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| 3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the |
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| 4 | * full text of the license. */ |
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| 5 | |
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| 6 | /** |
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| 7 | * @requires OpenLayers/Format/XML.js |
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| 8 | * @requires OpenLayers/Feature/Vector.js |
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| 9 | * @requires OpenLayers/Geometry/Point.js |
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| 10 | * @requires OpenLayers/Geometry/MultiPoint.js |
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| 11 | * @requires OpenLayers/Geometry/LineString.js |
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| 12 | * @requires OpenLayers/Geometry/MultiLineString.js |
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| 13 | * @requires OpenLayers/Geometry/Polygon.js |
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| 14 | * @requires OpenLayers/Geometry/MultiPolygon.js |
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| 15 | * @requires OpenLayers/Console.js |
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| 16 | */ |
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| 17 | |
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| 18 | /** |
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| 19 | * Class: OpenLayers.Format.GML |
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| 20 | * Read/Wite GML. Create a new instance with the <OpenLayers.Format.GML> |
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| 21 | * constructor. Supports the GML simple features profile. |
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| 22 | * |
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| 23 | * Inherits from: |
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| 24 | * - <OpenLayers.Format> |
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| 25 | */ |
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| 26 | OpenLayers.Format.GML = OpenLayers.Class(OpenLayers.Format.XML, { |
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| 27 | |
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| 28 | /* |
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| 29 | * APIProperty: featureNS |
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| 30 | * {String} Namespace used for feature attributes. Default is |
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| 31 | * "http://mapserver.gis.umn.edu/mapserver". |
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| 32 | */ |
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| 33 | featureNS: "http://mapserver.gis.umn.edu/mapserver", |
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| 34 | |
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| 35 | /** |
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| 36 | * APIProperty: featurePrefix |
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| 37 | * {String} Namespace alias (or prefix) for feature nodes. Default is |
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| 38 | * "feature". |
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| 39 | */ |
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| 40 | featurePrefix: "feature", |
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| 41 | |
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| 42 | /* |
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| 43 | * APIProperty: featureName |
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| 44 | * {String} Element name for features. Default is "featureMember". |
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| 45 | */ |
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| 46 | featureName: "featureMember", |
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| 47 | |
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| 48 | /* |
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| 49 | * APIProperty: layerName |
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| 50 | * {String} Name of data layer. Default is "features". |
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| 51 | */ |
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| 52 | layerName: "features", |
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| 53 | |
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| 54 | /** |
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| 55 | * APIProperty: geometryName |
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| 56 | * {String} Name of geometry element. Defaults to "geometry". |
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| 57 | */ |
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| 58 | geometryName: "geometry", |
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| 59 | |
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| 60 | /** |
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| 61 | * APIProperty: collectionName |
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| 62 | * {String} Name of featureCollection element. |
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| 63 | */ |
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| 64 | collectionName: "FeatureCollection", |
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| 65 | |
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| 66 | /** |
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| 67 | * APIProperty: gmlns |
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| 68 | * {String} GML Namespace. |
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| 69 | */ |
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| 70 | gmlns: "http://www.opengis.net/gml", |
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| 71 | |
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| 72 | /** |
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| 73 | * APIProperty: extractAttributes |
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| 74 | * {Boolean} Extract attributes from GML. |
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| 75 | */ |
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| 76 | extractAttributes: true, |
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| 77 | |
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| 78 | /** |
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| 79 | * APIProperty: xy |
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| 80 | * {Boolean} Order of the GML coordinate true:(x,y) or false:(y,x) |
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| 81 | * Changing is not recommended, a new Format should be instantiated. |
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| 82 | */ |
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| 83 | xy: true, |
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| 84 | |
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| 85 | /** |
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| 86 | * Constructor: OpenLayers.Format.GML |
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| 87 | * Create a new parser for GML. |
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| 88 | * |
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| 89 | * Parameters: |
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| 90 | * options - {Object} An optional object whose properties will be set on |
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| 91 | * this instance. |
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| 92 | */ |
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| 93 | initialize: function(options) { |
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| 94 | // compile regular expressions once instead of every time they are used |
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| 95 | this.regExes = { |
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| 96 | trimSpace: (/^\s*|\s*$/g), |
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| 97 | removeSpace: (/\s*/g), |
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| 98 | splitSpace: (/\s+/), |
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| 99 | trimComma: (/\s*,\s*/g) |
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| 100 | }; |
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| 101 | OpenLayers.Format.XML.prototype.initialize.apply(this, [options]); |
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| 102 | }, |
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| 103 | |
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| 104 | /** |
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| 105 | * APIMethod: read |
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| 106 | * Read data from a string, and return a list of features. |
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| 107 | * |
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| 108 | * Parameters: |
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| 109 | * data - {String} or {DOMElement} data to read/parse. |
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| 110 | * |
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| 111 | * Returns: |
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| 112 | * {Array(<OpenLayers.Feature.Vector>)} An array of features. |
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| 113 | */ |
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| 114 | read: function(data) { |
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| 115 | if(typeof data == "string") { |
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| 116 | data = OpenLayers.Format.XML.prototype.read.apply(this, [data]); |
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| 117 | } |
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| 118 | var featureNodes = this.getElementsByTagNameNS(data.documentElement, |
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| 119 | this.gmlns, |
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| 120 | this.featureName); |
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| 121 | var features = []; |
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| 122 | for(var i=0; i<featureNodes.length; i++) { |
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| 123 | var feature = this.parseFeature(featureNodes[i]); |
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| 124 | if(feature) { |
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| 125 | features.push(feature); |
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| 126 | } |
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| 127 | } |
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| 128 | return features; |
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| 129 | }, |
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| 130 | |
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| 131 | /** |
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| 132 | * Method: parseFeature |
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| 133 | * This function is the core of the GML parsing code in OpenLayers. |
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| 134 | * It creates the geometries that are then attached to the returned |
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| 135 | * feature, and calls parseAttributes() to get attribute data out. |
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| 136 | * |
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| 137 | * Parameters: |
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| 138 | * node - {DOMElement} A GML feature node. |
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| 139 | */ |
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| 140 | parseFeature: function(node) { |
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| 141 | // only accept one geometry per feature - look for highest "order" |
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| 142 | var order = ["MultiPolygon", "Polygon", |
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| 143 | "MultiLineString", "LineString", |
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| 144 | "MultiPoint", "Point", "Envelope"]; |
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| 145 | // FIXME: In case we parse a feature with no geometry, but boundedBy an Envelope, |
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| 146 | // this code creates a geometry derived from the Envelope. This is not correct. |
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| 147 | var type, nodeList, geometry, parser; |
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| 148 | for(var i=0; i<order.length; ++i) { |
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| 149 | type = order[i]; |
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| 150 | nodeList = this.getElementsByTagNameNS(node, this.gmlns, type); |
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| 151 | if(nodeList.length > 0) { |
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| 152 | // only deal with first geometry of this type |
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| 153 | parser = this.parseGeometry[type.toLowerCase()]; |
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| 154 | if(parser) { |
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| 155 | geometry = parser.apply(this, [nodeList[0]]); |
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| 156 | if (this.internalProjection && this.externalProjection) { |
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| 157 | geometry.transform(this.externalProjection, |
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| 158 | this.internalProjection); |
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| 159 | } |
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| 160 | } else { |
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| 161 | OpenLayers.Console.error(OpenLayers.i18n( |
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| 162 | "unsupportedGeometryType", {'geomType':type})); |
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| 163 | } |
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| 164 | // stop looking for different geometry types |
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| 165 | break; |
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| 166 | } |
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| 167 | } |
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| 168 | |
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| 169 | var bounds; |
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| 170 | var boxNodes = this.getElementsByTagNameNS(node, this.gmlns, "Box"); |
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| 171 | for(i=0; i<boxNodes.length; ++i) { |
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| 172 | var boxNode = boxNodes[i]; |
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| 173 | var box = this.parseGeometry["box"].apply(this, [boxNode]); |
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| 174 | var parentNode = boxNode.parentNode; |
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| 175 | var parentName = parentNode.localName || |
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| 176 | parentNode.nodeName.split(":").pop(); |
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| 177 | if(parentName === "boundedBy") { |
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| 178 | bounds = box; |
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| 179 | } else { |
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| 180 | geometry = box.toGeometry(); |
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| 181 | } |
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| 182 | } |
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| 183 | |
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| 184 | // construct feature (optionally with attributes) |
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| 185 | var attributes; |
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| 186 | if(this.extractAttributes) { |
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| 187 | attributes = this.parseAttributes(node); |
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| 188 | } |
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| 189 | var feature = new OpenLayers.Feature.Vector(geometry, attributes); |
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| 190 | feature.bounds = bounds; |
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| 191 | |
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| 192 | feature.gml = { |
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| 193 | featureType: node.firstChild.nodeName.split(":")[1], |
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| 194 | featureNS: node.firstChild.namespaceURI, |
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| 195 | featureNSPrefix: node.firstChild.prefix |
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| 196 | }; |
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| 197 | |
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| 198 | // assign fid - this can come from a "fid" or "id" attribute |
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| 199 | var childNode = node.firstChild; |
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| 200 | var fid; |
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| 201 | while(childNode) { |
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| 202 | if(childNode.nodeType == 1) { |
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| 203 | fid = childNode.getAttribute("fid") || |
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| 204 | childNode.getAttribute("id"); |
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| 205 | if(fid) { |
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| 206 | break; |
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| 207 | } |
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| 208 | } |
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| 209 | childNode = childNode.nextSibling; |
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| 210 | } |
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| 211 | feature.fid = fid; |
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| 212 | return feature; |
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| 213 | }, |
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| 214 | |
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| 215 | /** |
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| 216 | * Property: parseGeometry |
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| 217 | * Properties of this object are the functions that parse geometries based |
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| 218 | * on their type. |
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| 219 | */ |
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| 220 | parseGeometry: { |
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| 221 | |
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| 222 | /** |
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| 223 | * Method: parseGeometry.point |
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| 224 | * Given a GML node representing a point geometry, create an OpenLayers |
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| 225 | * point geometry. |
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| 226 | * |
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| 227 | * Parameters: |
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| 228 | * node - {DOMElement} A GML node. |
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| 229 | * |
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| 230 | * Returns: |
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| 231 | * {<OpenLayers.Geometry.Point>} A point geometry. |
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| 232 | */ |
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| 233 | point: function(node) { |
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| 234 | /** |
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| 235 | * Three coordinate variations to consider: |
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| 236 | * 1) <gml:pos>x y z</gml:pos> |
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| 237 | * 2) <gml:coordinates>x, y, z</gml:coordinates> |
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| 238 | * 3) <gml:coord><gml:X>x</gml:X><gml:Y>y</gml:Y></gml:coord> |
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| 239 | */ |
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| 240 | var nodeList, coordString; |
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| 241 | var coords = []; |
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| 242 | |
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| 243 | // look for <gml:pos> |
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| 244 | var nodeList = this.getElementsByTagNameNS(node, this.gmlns, "pos"); |
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| 245 | if(nodeList.length > 0) { |
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| 246 | coordString = nodeList[0].firstChild.nodeValue; |
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| 247 | coordString = coordString.replace(this.regExes.trimSpace, ""); |
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| 248 | coords = coordString.split(this.regExes.splitSpace); |
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| 249 | } |
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| 250 | |
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| 251 | // look for <gml:coordinates> |
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| 252 | if(coords.length == 0) { |
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| 253 | nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 254 | "coordinates"); |
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| 255 | if(nodeList.length > 0) { |
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| 256 | coordString = nodeList[0].firstChild.nodeValue; |
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| 257 | coordString = coordString.replace(this.regExes.removeSpace, |
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| 258 | ""); |
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| 259 | coords = coordString.split(","); |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | // look for <gml:coord> |
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| 264 | if(coords.length == 0) { |
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| 265 | nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 266 | "coord"); |
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| 267 | if(nodeList.length > 0) { |
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| 268 | var xList = this.getElementsByTagNameNS(nodeList[0], |
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| 269 | this.gmlns, "X"); |
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| 270 | var yList = this.getElementsByTagNameNS(nodeList[0], |
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| 271 | this.gmlns, "Y"); |
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| 272 | if(xList.length > 0 && yList.length > 0) { |
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| 273 | coords = [xList[0].firstChild.nodeValue, |
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| 274 | yList[0].firstChild.nodeValue]; |
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| 275 | } |
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| 276 | } |
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| 277 | } |
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| 278 | |
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| 279 | // preserve third dimension |
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| 280 | if(coords.length == 2) { |
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| 281 | coords[2] = null; |
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| 282 | } |
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| 283 | |
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| 284 | if (this.xy) { |
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| 285 | return new OpenLayers.Geometry.Point(coords[0], coords[1], |
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| 286 | coords[2]); |
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| 287 | } |
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| 288 | else{ |
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| 289 | return new OpenLayers.Geometry.Point(coords[1], coords[0], |
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| 290 | coords[2]); |
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| 291 | } |
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| 292 | }, |
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| 293 | |
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| 294 | /** |
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| 295 | * Method: parseGeometry.multipoint |
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| 296 | * Given a GML node representing a multipoint geometry, create an |
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| 297 | * OpenLayers multipoint geometry. |
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| 298 | * |
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| 299 | * Parameters: |
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| 300 | * node - {DOMElement} A GML node. |
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| 301 | * |
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| 302 | * Returns: |
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| 303 | * {<OpenLayers.Geometry.MultiPoint>} A multipoint geometry. |
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| 304 | */ |
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| 305 | multipoint: function(node) { |
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| 306 | var nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 307 | "Point"); |
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| 308 | var components = []; |
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| 309 | if(nodeList.length > 0) { |
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| 310 | var point; |
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| 311 | for(var i=0; i<nodeList.length; ++i) { |
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| 312 | point = this.parseGeometry.point.apply(this, [nodeList[i]]); |
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| 313 | if(point) { |
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| 314 | components.push(point); |
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| 315 | } |
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| 316 | } |
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| 317 | } |
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| 318 | return new OpenLayers.Geometry.MultiPoint(components); |
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| 319 | }, |
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| 320 | |
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| 321 | /** |
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| 322 | * Method: parseGeometry.linestring |
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| 323 | * Given a GML node representing a linestring geometry, create an |
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| 324 | * OpenLayers linestring geometry. |
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| 325 | * |
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| 326 | * Parameters: |
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| 327 | * node - {DOMElement} A GML node. |
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| 328 | * |
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| 329 | * Returns: |
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| 330 | * {<OpenLayers.Geometry.LineString>} A linestring geometry. |
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| 331 | */ |
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| 332 | linestring: function(node, ring) { |
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| 333 | /** |
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| 334 | * Two coordinate variations to consider: |
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| 335 | * 1) <gml:posList dimension="d">x0 y0 z0 x1 y1 z1</gml:posList> |
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| 336 | * 2) <gml:coordinates>x0, y0, z0 x1, y1, z1</gml:coordinates> |
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| 337 | */ |
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| 338 | var nodeList, coordString; |
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| 339 | var coords = []; |
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| 340 | var points = []; |
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| 341 | |
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| 342 | // look for <gml:posList> |
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| 343 | nodeList = this.getElementsByTagNameNS(node, this.gmlns, "posList"); |
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| 344 | if(nodeList.length > 0) { |
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| 345 | coordString = this.getChildValue(nodeList[0]); |
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| 346 | coordString = coordString.replace(this.regExes.trimSpace, ""); |
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| 347 | coords = coordString.split(this.regExes.splitSpace); |
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| 348 | var dim = parseInt(nodeList[0].getAttribute("dimension")); |
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| 349 | var j, x, y, z; |
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| 350 | for(var i=0; i<coords.length/dim; ++i) { |
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| 351 | j = i * dim; |
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| 352 | x = coords[j]; |
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| 353 | y = coords[j+1]; |
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| 354 | z = (dim == 2) ? null : coords[j+2]; |
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| 355 | if (this.xy) { |
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| 356 | points.push(new OpenLayers.Geometry.Point(x, y, z)); |
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| 357 | } else { |
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| 358 | points.push(new OpenLayers.Geometry.Point(y, x, z)); |
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| 359 | } |
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| 360 | } |
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| 361 | } |
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| 362 | |
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| 363 | // look for <gml:coordinates> |
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| 364 | if(coords.length == 0) { |
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| 365 | nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 366 | "coordinates"); |
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| 367 | if(nodeList.length > 0) { |
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| 368 | coordString = this.getChildValue(nodeList[0]); |
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| 369 | coordString = coordString.replace(this.regExes.trimSpace, |
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| 370 | ""); |
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| 371 | coordString = coordString.replace(this.regExes.trimComma, |
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| 372 | ","); |
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| 373 | var pointList = coordString.split(this.regExes.splitSpace); |
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| 374 | for(var i=0; i<pointList.length; ++i) { |
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| 375 | coords = pointList[i].split(","); |
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| 376 | if(coords.length == 2) { |
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| 377 | coords[2] = null; |
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| 378 | } |
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| 379 | if (this.xy) { |
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| 380 | points.push(new OpenLayers.Geometry.Point(coords[0], |
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| 381 | coords[1], |
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| 382 | coords[2])); |
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| 383 | } else { |
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| 384 | points.push(new OpenLayers.Geometry.Point(coords[1], |
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| 385 | coords[0], |
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| 386 | coords[2])); |
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| 387 | } |
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| 388 | } |
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| 389 | } |
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| 390 | } |
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| 391 | |
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| 392 | var line = null; |
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| 393 | if(points.length != 0) { |
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| 394 | if(ring) { |
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| 395 | line = new OpenLayers.Geometry.LinearRing(points); |
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| 396 | } else { |
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| 397 | line = new OpenLayers.Geometry.LineString(points); |
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| 398 | } |
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| 399 | } |
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| 400 | return line; |
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| 401 | }, |
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| 402 | |
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| 403 | /** |
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| 404 | * Method: parseGeometry.multilinestring |
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| 405 | * Given a GML node representing a multilinestring geometry, create an |
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| 406 | * OpenLayers multilinestring geometry. |
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| 407 | * |
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| 408 | * Parameters: |
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| 409 | * node - {DOMElement} A GML node. |
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| 410 | * |
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| 411 | * Returns: |
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| 412 | * {<OpenLayers.Geometry.MultiLineString>} A multilinestring geometry. |
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| 413 | */ |
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| 414 | multilinestring: function(node) { |
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| 415 | var nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 416 | "LineString"); |
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| 417 | var components = []; |
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| 418 | if(nodeList.length > 0) { |
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| 419 | var line; |
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| 420 | for(var i=0; i<nodeList.length; ++i) { |
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| 421 | line = this.parseGeometry.linestring.apply(this, |
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| 422 | [nodeList[i]]); |
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| 423 | if(line) { |
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| 424 | components.push(line); |
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| 425 | } |
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| 426 | } |
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| 427 | } |
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| 428 | return new OpenLayers.Geometry.MultiLineString(components); |
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| 429 | }, |
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| 430 | |
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| 431 | /** |
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| 432 | * Method: parseGeometry.polygon |
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| 433 | * Given a GML node representing a polygon geometry, create an |
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| 434 | * OpenLayers polygon geometry. |
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| 435 | * |
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| 436 | * Parameters: |
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| 437 | * node - {DOMElement} A GML node. |
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| 438 | * |
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| 439 | * Returns: |
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| 440 | * {<OpenLayers.Geometry.Polygon>} A polygon geometry. |
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| 441 | */ |
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| 442 | polygon: function(node) { |
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| 443 | var nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 444 | "LinearRing"); |
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| 445 | var components = []; |
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| 446 | if(nodeList.length > 0) { |
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| 447 | // this assumes exterior ring first, inner rings after |
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| 448 | var ring; |
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| 449 | for(var i=0; i<nodeList.length; ++i) { |
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| 450 | ring = this.parseGeometry.linestring.apply(this, |
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| 451 | [nodeList[i], true]); |
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| 452 | if(ring) { |
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| 453 | components.push(ring); |
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| 454 | } |
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| 455 | } |
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| 456 | } |
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| 457 | return new OpenLayers.Geometry.Polygon(components); |
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| 458 | }, |
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| 459 | |
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| 460 | /** |
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| 461 | * Method: parseGeometry.multipolygon |
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| 462 | * Given a GML node representing a multipolygon geometry, create an |
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| 463 | * OpenLayers multipolygon geometry. |
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| 464 | * |
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| 465 | * Parameters: |
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| 466 | * node - {DOMElement} A GML node. |
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| 467 | * |
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| 468 | * Returns: |
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| 469 | * {<OpenLayers.Geometry.MultiPolygon>} A multipolygon geometry. |
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| 470 | */ |
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| 471 | multipolygon: function(node) { |
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| 472 | var nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
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| 473 | "Polygon"); |
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| 474 | var components = []; |
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| 475 | if(nodeList.length > 0) { |
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| 476 | var polygon; |
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| 477 | for(var i=0; i<nodeList.length; ++i) { |
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| 478 | polygon = this.parseGeometry.polygon.apply(this, |
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| 479 | [nodeList[i]]); |
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| 480 | if(polygon) { |
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| 481 | components.push(polygon); |
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| 482 | } |
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| 483 | } |
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| 484 | } |
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| 485 | return new OpenLayers.Geometry.MultiPolygon(components); |
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| 486 | }, |
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| 487 | |
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| 488 | envelope: function(node) { |
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| 489 | var components = []; |
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| 490 | var coordString; |
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| 491 | var envelope; |
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| 492 | |
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| 493 | var lpoint = this.getElementsByTagNameNS(node, this.gmlns, "lowerCorner"); |
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| 494 | if (lpoint.length > 0) { |
---|
| 495 | var coords = []; |
---|
| 496 | |
---|
| 497 | if(lpoint.length > 0) { |
---|
| 498 | coordString = lpoint[0].firstChild.nodeValue; |
---|
| 499 | coordString = coordString.replace(this.regExes.trimSpace, ""); |
---|
| 500 | coords = coordString.split(this.regExes.splitSpace); |
---|
| 501 | } |
---|
| 502 | |
---|
| 503 | if(coords.length == 2) { |
---|
| 504 | coords[2] = null; |
---|
| 505 | } |
---|
| 506 | if (this.xy) { |
---|
| 507 | var lowerPoint = new OpenLayers.Geometry.Point(coords[0], coords[1],coords[2]); |
---|
| 508 | } else { |
---|
| 509 | var lowerPoint = new OpenLayers.Geometry.Point(coords[1], coords[0],coords[2]); |
---|
| 510 | } |
---|
| 511 | } |
---|
| 512 | |
---|
| 513 | var upoint = this.getElementsByTagNameNS(node, this.gmlns, "upperCorner"); |
---|
| 514 | if (upoint.length > 0) { |
---|
| 515 | var coords = []; |
---|
| 516 | |
---|
| 517 | if(upoint.length > 0) { |
---|
| 518 | coordString = upoint[0].firstChild.nodeValue; |
---|
| 519 | coordString = coordString.replace(this.regExes.trimSpace, ""); |
---|
| 520 | coords = coordString.split(this.regExes.splitSpace); |
---|
| 521 | } |
---|
| 522 | |
---|
| 523 | if(coords.length == 2) { |
---|
| 524 | coords[2] = null; |
---|
| 525 | } |
---|
| 526 | if (this.xy) { |
---|
| 527 | var upperPoint = new OpenLayers.Geometry.Point(coords[0], coords[1],coords[2]); |
---|
| 528 | } else { |
---|
| 529 | var upperPoint = new OpenLayers.Geometry.Point(coords[1], coords[0],coords[2]); |
---|
| 530 | } |
---|
| 531 | } |
---|
| 532 | |
---|
| 533 | if (lowerPoint && upperPoint) { |
---|
| 534 | components.push(new OpenLayers.Geometry.Point(lowerPoint.x, lowerPoint.y)); |
---|
| 535 | components.push(new OpenLayers.Geometry.Point(upperPoint.x, lowerPoint.y)); |
---|
| 536 | components.push(new OpenLayers.Geometry.Point(upperPoint.x, upperPoint.y)); |
---|
| 537 | components.push(new OpenLayers.Geometry.Point(lowerPoint.x, upperPoint.y)); |
---|
| 538 | components.push(new OpenLayers.Geometry.Point(lowerPoint.x, lowerPoint.y)); |
---|
| 539 | |
---|
| 540 | var ring = new OpenLayers.Geometry.LinearRing(components); |
---|
| 541 | envelope = new OpenLayers.Geometry.Polygon([ring]); |
---|
| 542 | } |
---|
| 543 | return envelope; |
---|
| 544 | }, |
---|
| 545 | |
---|
| 546 | /** |
---|
| 547 | * Method: parseGeometry.box |
---|
| 548 | * Given a GML node representing a box geometry, create an |
---|
| 549 | * OpenLayers.Bounds. |
---|
| 550 | * |
---|
| 551 | * Parameters: |
---|
| 552 | * node - {DOMElement} A GML node. |
---|
| 553 | * |
---|
| 554 | * Returns: |
---|
| 555 | * {<OpenLayers.Bounds>} A bounds representing the box. |
---|
| 556 | */ |
---|
| 557 | box: function(node) { |
---|
| 558 | var nodeList = this.getElementsByTagNameNS(node, this.gmlns, |
---|
| 559 | "coordinates"); |
---|
| 560 | var coordString; |
---|
| 561 | var coords, beginPoint = null, endPoint = null; |
---|
| 562 | if (nodeList.length > 0) { |
---|
| 563 | coordString = nodeList[0].firstChild.nodeValue; |
---|
| 564 | coords = coordString.split(" "); |
---|
| 565 | if (coords.length == 2) { |
---|
| 566 | beginPoint = coords[0].split(","); |
---|
| 567 | endPoint = coords[1].split(","); |
---|
| 568 | } |
---|
| 569 | } |
---|
| 570 | if (beginPoint !== null && endPoint !== null) { |
---|
| 571 | return new OpenLayers.Bounds(parseFloat(beginPoint[0]), |
---|
| 572 | parseFloat(beginPoint[1]), |
---|
| 573 | parseFloat(endPoint[0]), |
---|
| 574 | parseFloat(endPoint[1]) ); |
---|
| 575 | } |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | }, |
---|
| 579 | |
---|
| 580 | /** |
---|
| 581 | * Method: parseAttributes |
---|
| 582 | * |
---|
| 583 | * Parameters: |
---|
| 584 | * node - {<DOMElement>} |
---|
| 585 | * |
---|
| 586 | * Returns: |
---|
| 587 | * {Object} An attributes object. |
---|
| 588 | */ |
---|
| 589 | parseAttributes: function(node) { |
---|
| 590 | var attributes = {}; |
---|
| 591 | // assume attributes are children of the first type 1 child |
---|
| 592 | var childNode = node.firstChild; |
---|
| 593 | var children, i, child, grandchildren, grandchild, name, value; |
---|
| 594 | while(childNode) { |
---|
| 595 | if(childNode.nodeType == 1) { |
---|
| 596 | // attributes are type 1 children with one type 3 child |
---|
| 597 | children = childNode.childNodes; |
---|
| 598 | for(i=0; i<children.length; ++i) { |
---|
| 599 | child = children[i]; |
---|
| 600 | if(child.nodeType == 1) { |
---|
| 601 | grandchildren = child.childNodes; |
---|
| 602 | if(grandchildren.length == 1) { |
---|
| 603 | grandchild = grandchildren[0]; |
---|
| 604 | if(grandchild.nodeType == 3 || |
---|
| 605 | grandchild.nodeType == 4) { |
---|
| 606 | name = (child.prefix) ? |
---|
| 607 | child.nodeName.split(":")[1] : |
---|
| 608 | child.nodeName; |
---|
| 609 | value = grandchild.nodeValue.replace( |
---|
| 610 | this.regExes.trimSpace, ""); |
---|
| 611 | attributes[name] = value; |
---|
| 612 | } |
---|
| 613 | } else { |
---|
| 614 | // If child has no childNodes (grandchildren), |
---|
| 615 | // set an attribute with null value. |
---|
| 616 | // e.g. <prefix:fieldname/> becomes |
---|
| 617 | // {fieldname: null} |
---|
| 618 | attributes[child.nodeName.split(":").pop()] = null; |
---|
| 619 | } |
---|
| 620 | } |
---|
| 621 | } |
---|
| 622 | break; |
---|
| 623 | } |
---|
| 624 | childNode = childNode.nextSibling; |
---|
| 625 | } |
---|
| 626 | return attributes; |
---|
| 627 | }, |
---|
| 628 | |
---|
| 629 | /** |
---|
| 630 | * APIMethod: write |
---|
| 631 | * Generate a GML document string given a list of features. |
---|
| 632 | * |
---|
| 633 | * Parameters: |
---|
| 634 | * features - {Array(<OpenLayers.Feature.Vector>)} List of features to |
---|
| 635 | * serialize into a string. |
---|
| 636 | * |
---|
| 637 | * Returns: |
---|
| 638 | * {String} A string representing the GML document. |
---|
| 639 | */ |
---|
| 640 | write: function(features) { |
---|
| 641 | if(!(features instanceof Array)) { |
---|
| 642 | features = [features]; |
---|
| 643 | } |
---|
| 644 | var gml = this.createElementNS("http://www.opengis.net/wfs", |
---|
| 645 | "wfs:" + this.collectionName); |
---|
| 646 | for(var i=0; i<features.length; i++) { |
---|
| 647 | gml.appendChild(this.createFeatureXML(features[i])); |
---|
| 648 | } |
---|
| 649 | return OpenLayers.Format.XML.prototype.write.apply(this, [gml]); |
---|
| 650 | }, |
---|
| 651 | |
---|
| 652 | /** |
---|
| 653 | * Method: createFeatureXML |
---|
| 654 | * Accept an OpenLayers.Feature.Vector, and build a GML node for it. |
---|
| 655 | * |
---|
| 656 | * Parameters: |
---|
| 657 | * feature - {<OpenLayers.Feature.Vector>} The feature to be built as GML. |
---|
| 658 | * |
---|
| 659 | * Returns: |
---|
| 660 | * {DOMElement} A node reprensting the feature in GML. |
---|
| 661 | */ |
---|
| 662 | createFeatureXML: function(feature) { |
---|
| 663 | var geometry = feature.geometry; |
---|
| 664 | var geometryNode = this.buildGeometryNode(geometry); |
---|
| 665 | var geomContainer = this.createElementNS(this.featureNS, |
---|
| 666 | this.featurePrefix + ":" + |
---|
| 667 | this.geometryName); |
---|
| 668 | geomContainer.appendChild(geometryNode); |
---|
| 669 | var featureNode = this.createElementNS(this.gmlns, |
---|
| 670 | "gml:" + this.featureName); |
---|
| 671 | var featureContainer = this.createElementNS(this.featureNS, |
---|
| 672 | this.featurePrefix + ":" + |
---|
| 673 | this.layerName); |
---|
| 674 | var fid = feature.fid || feature.id; |
---|
| 675 | featureContainer.setAttribute("fid", fid); |
---|
| 676 | featureContainer.appendChild(geomContainer); |
---|
| 677 | for(var attr in feature.attributes) { |
---|
| 678 | var attrText = this.createTextNode(feature.attributes[attr]); |
---|
| 679 | var nodename = attr.substring(attr.lastIndexOf(":") + 1); |
---|
| 680 | var attrContainer = this.createElementNS(this.featureNS, |
---|
| 681 | this.featurePrefix + ":" + |
---|
| 682 | nodename); |
---|
| 683 | attrContainer.appendChild(attrText); |
---|
| 684 | featureContainer.appendChild(attrContainer); |
---|
| 685 | } |
---|
| 686 | featureNode.appendChild(featureContainer); |
---|
| 687 | return featureNode; |
---|
| 688 | }, |
---|
| 689 | |
---|
| 690 | /** |
---|
| 691 | * APIMethod: buildGeometryNode |
---|
| 692 | */ |
---|
| 693 | buildGeometryNode: function(geometry) { |
---|
| 694 | if (this.externalProjection && this.internalProjection) { |
---|
| 695 | geometry = geometry.clone(); |
---|
| 696 | geometry.transform(this.internalProjection, |
---|
| 697 | this.externalProjection); |
---|
| 698 | } |
---|
| 699 | var className = geometry.CLASS_NAME; |
---|
| 700 | var type = className.substring(className.lastIndexOf(".") + 1); |
---|
| 701 | var builder = this.buildGeometry[type.toLowerCase()]; |
---|
| 702 | return builder.apply(this, [geometry]); |
---|
| 703 | }, |
---|
| 704 | |
---|
| 705 | /** |
---|
| 706 | * Property: buildGeometry |
---|
| 707 | * Object containing methods to do the actual geometry node building |
---|
| 708 | * based on geometry type. |
---|
| 709 | */ |
---|
| 710 | buildGeometry: { |
---|
| 711 | // TBD retrieve the srs from layer |
---|
| 712 | // srsName is non-standard, so not including it until it's right. |
---|
| 713 | // gml.setAttribute("srsName", |
---|
| 714 | // "http://www.opengis.net/gml/srs/epsg.xml#4326"); |
---|
| 715 | |
---|
| 716 | /** |
---|
| 717 | * Method: buildGeometry.point |
---|
| 718 | * Given an OpenLayers point geometry, create a GML point. |
---|
| 719 | * |
---|
| 720 | * Parameters: |
---|
| 721 | * geometry - {<OpenLayers.Geometry.Point>} A point geometry. |
---|
| 722 | * |
---|
| 723 | * Returns: |
---|
| 724 | * {DOMElement} A GML point node. |
---|
| 725 | */ |
---|
| 726 | point: function(geometry) { |
---|
| 727 | var gml = this.createElementNS(this.gmlns, "gml:Point"); |
---|
| 728 | gml.appendChild(this.buildCoordinatesNode(geometry)); |
---|
| 729 | return gml; |
---|
| 730 | }, |
---|
| 731 | |
---|
| 732 | /** |
---|
| 733 | * Method: buildGeometry.multipoint |
---|
| 734 | * Given an OpenLayers multipoint geometry, create a GML multipoint. |
---|
| 735 | * |
---|
| 736 | * Parameters: |
---|
| 737 | * geometry - {<OpenLayers.Geometry.MultiPoint>} A multipoint geometry. |
---|
| 738 | * |
---|
| 739 | * Returns: |
---|
| 740 | * {DOMElement} A GML multipoint node. |
---|
| 741 | */ |
---|
| 742 | multipoint: function(geometry) { |
---|
| 743 | var gml = this.createElementNS(this.gmlns, "gml:MultiPoint"); |
---|
| 744 | var points = geometry.components; |
---|
| 745 | var pointMember, pointGeom; |
---|
| 746 | for(var i=0; i<points.length; i++) { |
---|
| 747 | pointMember = this.createElementNS(this.gmlns, |
---|
| 748 | "gml:pointMember"); |
---|
| 749 | pointGeom = this.buildGeometry.point.apply(this, |
---|
| 750 | [points[i]]); |
---|
| 751 | pointMember.appendChild(pointGeom); |
---|
| 752 | gml.appendChild(pointMember); |
---|
| 753 | } |
---|
| 754 | return gml; |
---|
| 755 | }, |
---|
| 756 | |
---|
| 757 | /** |
---|
| 758 | * Method: buildGeometry.linestring |
---|
| 759 | * Given an OpenLayers linestring geometry, create a GML linestring. |
---|
| 760 | * |
---|
| 761 | * Parameters: |
---|
| 762 | * geometry - {<OpenLayers.Geometry.LineString>} A linestring geometry. |
---|
| 763 | * |
---|
| 764 | * Returns: |
---|
| 765 | * {DOMElement} A GML linestring node. |
---|
| 766 | */ |
---|
| 767 | linestring: function(geometry) { |
---|
| 768 | var gml = this.createElementNS(this.gmlns, "gml:LineString"); |
---|
| 769 | gml.appendChild(this.buildCoordinatesNode(geometry)); |
---|
| 770 | return gml; |
---|
| 771 | }, |
---|
| 772 | |
---|
| 773 | /** |
---|
| 774 | * Method: buildGeometry.multilinestring |
---|
| 775 | * Given an OpenLayers multilinestring geometry, create a GML |
---|
| 776 | * multilinestring. |
---|
| 777 | * |
---|
| 778 | * Parameters: |
---|
| 779 | * geometry - {<OpenLayers.Geometry.MultiLineString>} A multilinestring |
---|
| 780 | * geometry. |
---|
| 781 | * |
---|
| 782 | * Returns: |
---|
| 783 | * {DOMElement} A GML multilinestring node. |
---|
| 784 | */ |
---|
| 785 | multilinestring: function(geometry) { |
---|
| 786 | var gml = this.createElementNS(this.gmlns, "gml:MultiLineString"); |
---|
| 787 | var lines = geometry.components; |
---|
| 788 | var lineMember, lineGeom; |
---|
| 789 | for(var i=0; i<lines.length; ++i) { |
---|
| 790 | lineMember = this.createElementNS(this.gmlns, |
---|
| 791 | "gml:lineStringMember"); |
---|
| 792 | lineGeom = this.buildGeometry.linestring.apply(this, |
---|
| 793 | [lines[i]]); |
---|
| 794 | lineMember.appendChild(lineGeom); |
---|
| 795 | gml.appendChild(lineMember); |
---|
| 796 | } |
---|
| 797 | return gml; |
---|
| 798 | }, |
---|
| 799 | |
---|
| 800 | /** |
---|
| 801 | * Method: buildGeometry.linearring |
---|
| 802 | * Given an OpenLayers linearring geometry, create a GML linearring. |
---|
| 803 | * |
---|
| 804 | * Parameters: |
---|
| 805 | * geometry - {<OpenLayers.Geometry.LinearRing>} A linearring geometry. |
---|
| 806 | * |
---|
| 807 | * Returns: |
---|
| 808 | * {DOMElement} A GML linearring node. |
---|
| 809 | */ |
---|
| 810 | linearring: function(geometry) { |
---|
| 811 | var gml = this.createElementNS(this.gmlns, "gml:LinearRing"); |
---|
| 812 | gml.appendChild(this.buildCoordinatesNode(geometry)); |
---|
| 813 | return gml; |
---|
| 814 | }, |
---|
| 815 | |
---|
| 816 | /** |
---|
| 817 | * Method: buildGeometry.polygon |
---|
| 818 | * Given an OpenLayers polygon geometry, create a GML polygon. |
---|
| 819 | * |
---|
| 820 | * Parameters: |
---|
| 821 | * geometry - {<OpenLayers.Geometry.Polygon>} A polygon geometry. |
---|
| 822 | * |
---|
| 823 | * Returns: |
---|
| 824 | * {DOMElement} A GML polygon node. |
---|
| 825 | */ |
---|
| 826 | polygon: function(geometry) { |
---|
| 827 | var gml = this.createElementNS(this.gmlns, "gml:Polygon"); |
---|
| 828 | var rings = geometry.components; |
---|
| 829 | var ringMember, ringGeom, type; |
---|
| 830 | for(var i=0; i<rings.length; ++i) { |
---|
| 831 | type = (i==0) ? "outerBoundaryIs" : "innerBoundaryIs"; |
---|
| 832 | ringMember = this.createElementNS(this.gmlns, |
---|
| 833 | "gml:" + type); |
---|
| 834 | ringGeom = this.buildGeometry.linearring.apply(this, |
---|
| 835 | [rings[i]]); |
---|
| 836 | ringMember.appendChild(ringGeom); |
---|
| 837 | gml.appendChild(ringMember); |
---|
| 838 | } |
---|
| 839 | return gml; |
---|
| 840 | }, |
---|
| 841 | |
---|
| 842 | /** |
---|
| 843 | * Method: buildGeometry.multipolygon |
---|
| 844 | * Given an OpenLayers multipolygon geometry, create a GML multipolygon. |
---|
| 845 | * |
---|
| 846 | * Parameters: |
---|
| 847 | * geometry - {<OpenLayers.Geometry.MultiPolygon>} A multipolygon |
---|
| 848 | * geometry. |
---|
| 849 | * |
---|
| 850 | * Returns: |
---|
| 851 | * {DOMElement} A GML multipolygon node. |
---|
| 852 | */ |
---|
| 853 | multipolygon: function(geometry) { |
---|
| 854 | var gml = this.createElementNS(this.gmlns, "gml:MultiPolygon"); |
---|
| 855 | var polys = geometry.components; |
---|
| 856 | var polyMember, polyGeom; |
---|
| 857 | for(var i=0; i<polys.length; ++i) { |
---|
| 858 | polyMember = this.createElementNS(this.gmlns, |
---|
| 859 | "gml:polygonMember"); |
---|
| 860 | polyGeom = this.buildGeometry.polygon.apply(this, |
---|
| 861 | [polys[i]]); |
---|
| 862 | polyMember.appendChild(polyGeom); |
---|
| 863 | gml.appendChild(polyMember); |
---|
| 864 | } |
---|
| 865 | return gml; |
---|
| 866 | |
---|
| 867 | }, |
---|
| 868 | |
---|
| 869 | /** |
---|
| 870 | * Method: buildGeometry.bounds |
---|
| 871 | * Given an OpenLayers bounds, create a GML box. |
---|
| 872 | * |
---|
| 873 | * Parameters: |
---|
| 874 | * bounds - {<OpenLayers.Geometry.Bounds>} A bounds object. |
---|
| 875 | * |
---|
| 876 | * Returns: |
---|
| 877 | * {DOMElement} A GML box node. |
---|
| 878 | */ |
---|
| 879 | bounds: function(bounds) { |
---|
| 880 | var gml = this.createElementNS(this.gmlns, "gml:Box"); |
---|
| 881 | gml.appendChild(this.buildCoordinatesNode(bounds)); |
---|
| 882 | return gml; |
---|
| 883 | } |
---|
| 884 | }, |
---|
| 885 | |
---|
| 886 | /** |
---|
| 887 | * Method: buildCoordinates |
---|
| 888 | * builds the coordinates XmlNode |
---|
| 889 | * (code) |
---|
| 890 | * <gml:coordinates decimal="." cs="," ts=" ">...</gml:coordinates> |
---|
| 891 | * (end) |
---|
| 892 | * Parameters: |
---|
| 893 | * geometry - {<OpenLayers.Geometry>} |
---|
| 894 | * |
---|
| 895 | * Returns: |
---|
| 896 | * {XmlNode} created xmlNode |
---|
| 897 | */ |
---|
| 898 | buildCoordinatesNode: function(geometry) { |
---|
| 899 | var coordinatesNode = this.createElementNS(this.gmlns, |
---|
| 900 | "gml:coordinates"); |
---|
| 901 | coordinatesNode.setAttribute("decimal", "."); |
---|
| 902 | coordinatesNode.setAttribute("cs", ","); |
---|
| 903 | coordinatesNode.setAttribute("ts", " "); |
---|
| 904 | |
---|
| 905 | var parts = []; |
---|
| 906 | |
---|
| 907 | if(geometry instanceof OpenLayers.Bounds){ |
---|
| 908 | parts.push(geometry.left + "," + geometry.bottom); |
---|
| 909 | parts.push(geometry.right + "," + geometry.top); |
---|
| 910 | } else { |
---|
| 911 | var points = (geometry.components) ? geometry.components : [geometry]; |
---|
| 912 | for(var i=0; i<points.length; i++) { |
---|
| 913 | parts.push(points[i].x + "," + points[i].y); |
---|
| 914 | } |
---|
| 915 | } |
---|
| 916 | |
---|
| 917 | var txtNode = this.createTextNode(parts.join(" ")); |
---|
| 918 | coordinatesNode.appendChild(txtNode); |
---|
| 919 | |
---|
| 920 | return coordinatesNode; |
---|
| 921 | }, |
---|
| 922 | |
---|
| 923 | CLASS_NAME: "OpenLayers.Format.GML" |
---|
| 924 | }); |
---|