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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