[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/Format/Context.js |
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| 9 | */ |
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| 10 | |
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| 11 | /** |
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| 12 | * Class: OpenLayers.Format.WMC |
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| 13 | * Read and write Web Map Context documents. |
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| 14 | * |
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| 15 | * Inherits from: |
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| 16 | * - <OpenLayers.Format.XML> |
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| 17 | */ |
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| 18 | OpenLayers.Format.WMC = OpenLayers.Class(OpenLayers.Format.Context, { |
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| 19 | |
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| 20 | /** |
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| 21 | * APIProperty: defaultVersion |
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| 22 | * {String} Version number to assume if none found. Default is "1.1.0". |
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| 23 | */ |
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| 24 | defaultVersion: "1.1.0", |
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| 25 | |
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| 26 | /** |
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| 27 | * Method: getParser |
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| 28 | * Get the WMC parser given a version. Create a new parser if it does not |
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| 29 | * already exist. |
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| 30 | * |
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| 31 | * Parameters: |
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| 32 | * version - {String} The version of the parser. |
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| 33 | * |
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| 34 | * Returns: |
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| 35 | * {<OpenLayers.Format.WMC.v1>} A WMC parser. |
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| 36 | */ |
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| 37 | getParser: function(version) { |
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| 38 | var v = version || this.version || this.defaultVersion; |
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| 39 | if(!this.parser || this.parser.VERSION != v) { |
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| 40 | var format = OpenLayers.Format.WMC[ |
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| 41 | "v" + v.replace(/\./g, "_") |
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| 42 | ]; |
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| 43 | if(!format) { |
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| 44 | throw "Can't find a WMC parser for version " + v; |
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| 45 | } |
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| 46 | this.parser = new format(this.options); |
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| 47 | } |
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| 48 | return this.parser; |
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| 49 | }, |
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| 50 | |
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| 51 | /** |
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| 52 | * Method: layerToContext |
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| 53 | * Create a layer context object given a wms layer object. |
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| 54 | * |
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| 55 | * Parameters: |
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| 56 | * obj - {<OpenLayers.Layer.WMS>} The layer. |
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| 57 | * |
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| 58 | * Returns: |
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| 59 | * {Object} A layer context object. |
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| 60 | */ |
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| 61 | layerToContext: function(layer) { |
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| 62 | var parser = this.getParser(); |
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| 63 | var layerContext = { |
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| 64 | queryable: layer.queryable, |
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| 65 | visibility: layer.visibility, |
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| 66 | name: layer.params["LAYERS"], |
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| 67 | title: layer.name, |
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| 68 | metadataURL: layer.metadataURL, |
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| 69 | version: layer.params["VERSION"], |
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| 70 | url: layer.url, |
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| 71 | maxExtent: layer.maxExtent, |
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| 72 | transparent: layer.params["TRANSPARENT"], |
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| 73 | numZoomLevels: layer.numZoomLevels, |
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| 74 | units: layer.units, |
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| 75 | isBaseLayer: layer.isBaseLayer, |
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| 76 | opacity: layer.opacity, |
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| 77 | displayInLayerSwitcher: layer.displayInLayerSwitcher, |
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| 78 | singleTile: layer.singleTile, |
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| 79 | tileSize: (layer.singleTile || !layer.tileSize) ? |
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| 80 | undefined : {width: layer.tileSize.w, height: layer.tileSize.h}, |
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| 81 | minScale : (layer.options.resolutions || |
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| 82 | layer.options.scales || |
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| 83 | layer.options.maxResolution || |
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| 84 | layer.options.minScale) ? |
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| 85 | layer.minScale : undefined, |
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| 86 | maxScale : (layer.options.resolutions || |
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| 87 | layer.options.scales || |
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| 88 | layer.options.minResolution || |
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| 89 | layer.options.maxScale) ? |
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| 90 | layer.maxScale : undefined, |
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| 91 | formats: [{ |
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| 92 | value: layer.params["FORMAT"], |
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| 93 | current: true |
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| 94 | }], |
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| 95 | styles: [{ |
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| 96 | href: layer.params["SLD"], |
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| 97 | body: layer.params["SLD_BODY"], |
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| 98 | name: layer.params["STYLES"] || parser.defaultStyleName, |
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| 99 | title: parser.defaultStyleTitle, |
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| 100 | current: true |
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| 101 | }] |
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| 102 | }; |
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| 103 | return layerContext; |
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| 104 | }, |
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| 105 | |
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| 106 | /** |
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| 107 | * Method: toContext |
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| 108 | * Create a context object free from layer given a map or a |
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| 109 | * context object. |
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| 110 | * |
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| 111 | * Parameters: |
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| 112 | * obj - {<OpenLayers.Map> | Object} The map or context. |
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| 113 | * |
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| 114 | * Returns: |
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| 115 | * {Object} A context object. |
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| 116 | */ |
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| 117 | toContext: function(obj) { |
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| 118 | var context = {}; |
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| 119 | var layers = obj.layers; |
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| 120 | if(obj.CLASS_NAME == "OpenLayers.Map") { |
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| 121 | context.bounds = obj.getExtent(); |
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| 122 | context.maxExtent = obj.maxExtent; |
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| 123 | context.projection = obj.projection; |
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| 124 | context.size = obj.getSize(); |
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| 125 | } |
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| 126 | else { |
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| 127 | // copy all obj properties except the "layers" property |
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| 128 | OpenLayers.Util.applyDefaults(context, obj); |
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| 129 | if(context.layers != undefined) { |
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| 130 | delete(context.layers); |
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| 131 | } |
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| 132 | } |
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| 133 | |
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| 134 | if (context.layersContext == undefined) { |
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| 135 | context.layersContext = []; |
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| 136 | } |
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| 137 | |
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| 138 | // let's convert layers into layersContext object (if any) |
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| 139 | if (layers != undefined && layers instanceof Array) { |
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| 140 | for (var i=0, len=layers.length; i<len; i++) { |
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| 141 | var layer = layers[i]; |
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| 142 | if(layer instanceof OpenLayers.Layer.WMS) { |
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| 143 | context.layersContext.push(this.layerToContext(layer)); |
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| 144 | } |
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| 145 | } |
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| 146 | } |
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| 147 | return context; |
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| 148 | }, |
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| 149 | |
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| 150 | CLASS_NAME: "OpenLayers.Format.WMC" |
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| 151 | |
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| 152 | }); |
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