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 | /** |
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8 | * @requires OpenLayers/Tile/WFS.js |
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9 | * @requires OpenLayers/Layer/Vector.js |
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10 | * @requires OpenLayers/Layer/Markers.js |
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11 | * @requires OpenLayers/Console.js |
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12 | */ |
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13 | |
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14 | /** |
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15 | * Class: OpenLayers.Layer.WFS |
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16 | * *Deprecated*. To be removed in 3.0. Instead use OpenLayers.Layer.Vector |
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17 | * with a Protocol.WFS and one or more Strategies. |
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18 | * |
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19 | * Inherits from: |
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20 | * - <OpenLayers.Layer.Vector> |
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21 | * - <OpenLayers.Layer.Markers> |
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22 | */ |
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23 | OpenLayers.Layer.WFS = OpenLayers.Class( |
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24 | OpenLayers.Layer.Vector, OpenLayers.Layer.Markers, { |
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25 | |
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26 | /** |
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27 | * APIProperty: isBaseLayer |
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28 | * {Boolean} WFS layer is not a base layer by default. |
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29 | */ |
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30 | isBaseLayer: false, |
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31 | |
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32 | /** |
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33 | * Property: tile |
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34 | * {<OpenLayers.Tile.WFS>} |
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35 | */ |
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36 | tile: null, |
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37 | |
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38 | /** |
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39 | * APIProperty: ratio |
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40 | * {Float} The ratio property determines the size of the serverside query |
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41 | * relative to the map viewport size. By default, we load an area twice |
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42 | * as big as the map, to allow for panning without immediately reload. |
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43 | * Setting this to 1 will cause the area of the WFS request to match |
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44 | * the map area exactly. It is recommended to set this to some number |
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45 | * at least slightly larger than 1, otherwise accidental clicks can |
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46 | * cause a data reload, by moving the map only 1 pixel. |
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47 | */ |
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48 | ratio: 2, |
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49 | |
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50 | /** |
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51 | * Property: DEFAULT_PARAMS |
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52 | * {Object} Hashtable of default key/value parameters |
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53 | */ |
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54 | DEFAULT_PARAMS: { service: "WFS", |
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55 | version: "1.0.0", |
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56 | request: "GetFeature" |
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57 | }, |
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58 | |
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59 | /** |
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60 | * APIProperty: featureClass |
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61 | * {<OpenLayers.Feature>} If featureClass is defined, an old-style markers |
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62 | * based WFS layer is created instead of a new-style vector layer. If |
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63 | * sent, this should be a subclass of OpenLayers.Feature |
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64 | */ |
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65 | featureClass: null, |
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66 | |
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67 | /** |
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68 | * APIProperty: format |
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69 | * {<OpenLayers.Format>} The format you want the data to be parsed with. |
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70 | * Must be passed in the constructor. Should be a class, not an instance. |
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71 | * This option can only be used if no featureClass is passed / vectorMode |
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72 | * is false: if a featureClass is passed, then this parameter is ignored. |
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73 | */ |
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74 | format: null, |
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75 | |
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76 | /** |
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77 | * Property: formatObject |
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78 | * {<OpenLayers.Format>} Internally created/managed format object, used by |
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79 | * the Tile to parse data. |
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80 | */ |
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81 | formatObject: null, |
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82 | |
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83 | /** |
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84 | * APIProperty: formatOptions |
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85 | * {Object} Hash of options which should be passed to the format when it is |
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86 | * created. Must be passed in the constructor. |
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87 | */ |
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88 | formatOptions: null, |
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89 | |
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90 | /** |
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91 | * Property: vectorMode |
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92 | * {Boolean} Should be calculated automatically. Determines whether the |
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93 | * layer is in vector mode or marker mode. |
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94 | */ |
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95 | vectorMode: true, |
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96 | |
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97 | /** |
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98 | * APIProperty: encodeBBOX |
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99 | * {Boolean} Should the BBOX commas be encoded? The WMS spec says 'no', |
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100 | * but some services want it that way. Default false. |
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101 | */ |
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102 | encodeBBOX: false, |
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103 | |
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104 | /** |
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105 | * APIProperty: extractAttributes |
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106 | * {Boolean} Should the WFS layer parse attributes from the retrieved |
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107 | * GML? Defaults to false. If enabled, parsing is slower, but |
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108 | * attributes are available in the attributes property of |
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109 | * layer features. |
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110 | */ |
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111 | extractAttributes: false, |
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112 | |
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113 | /** |
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114 | * Constructor: OpenLayers.Layer.WFS |
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115 | * |
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116 | * Parameters: |
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117 | * name - {String} |
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118 | * url - {String} |
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119 | * params - {Object} |
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120 | * options - {Object} Hashtable of extra options to tag onto the layer |
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121 | */ |
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122 | initialize: function(name, url, params, options) { |
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123 | if (options == undefined) { options = {}; } |
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124 | |
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125 | if (options.featureClass || |
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126 | !OpenLayers.Layer.Vector || |
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127 | !OpenLayers.Feature.Vector) { |
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128 | this.vectorMode = false; |
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129 | } |
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130 | |
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131 | // Uppercase params |
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132 | params = OpenLayers.Util.upperCaseObject(params); |
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133 | |
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134 | // Turn off error reporting, browsers like Safari may work |
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135 | // depending on the setup, and we don't want an unneccesary alert. |
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136 | OpenLayers.Util.extend(options, {'reportError': false}); |
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137 | var newArguments = []; |
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138 | newArguments.push(name, options); |
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139 | OpenLayers.Layer.Vector.prototype.initialize.apply(this, newArguments); |
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140 | if (!this.renderer || !this.vectorMode) { |
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141 | this.vectorMode = false; |
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142 | if (!options.featureClass) { |
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143 | options.featureClass = OpenLayers.Feature.WFS; |
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144 | } |
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145 | OpenLayers.Layer.Markers.prototype.initialize.apply(this, |
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146 | newArguments); |
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147 | } |
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148 | |
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149 | if (this.params && this.params.typename && !this.options.typename) { |
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150 | this.options.typename = this.params.typename; |
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151 | } |
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152 | |
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153 | if (!this.options.geometry_column) { |
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154 | this.options.geometry_column = "the_geom"; |
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155 | } |
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156 | |
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157 | this.params = OpenLayers.Util.applyDefaults( |
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158 | params, |
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159 | OpenLayers.Util.upperCaseObject(this.DEFAULT_PARAMS) |
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160 | ); |
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161 | this.url = url; |
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162 | }, |
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163 | |
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164 | |
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165 | /** |
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166 | * APIMethod: destroy |
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167 | */ |
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168 | destroy: function() { |
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169 | if (this.vectorMode) { |
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170 | OpenLayers.Layer.Vector.prototype.destroy.apply(this, arguments); |
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171 | } else { |
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172 | OpenLayers.Layer.Markers.prototype.destroy.apply(this, arguments); |
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173 | } |
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174 | if (this.tile) { |
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175 | this.tile.destroy(); |
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176 | } |
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177 | this.tile = null; |
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178 | |
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179 | this.ratio = null; |
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180 | this.featureClass = null; |
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181 | this.format = null; |
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182 | |
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183 | if (this.formatObject && this.formatObject.destroy) { |
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184 | this.formatObject.destroy(); |
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185 | } |
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186 | this.formatObject = null; |
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187 | |
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188 | this.formatOptions = null; |
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189 | this.vectorMode = null; |
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190 | this.encodeBBOX = null; |
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191 | this.extractAttributes = null; |
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192 | }, |
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193 | |
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194 | /** |
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195 | * Method: setMap |
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196 | * |
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197 | * Parameters: |
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198 | * map - {<OpenLayers.Map>} |
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199 | */ |
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200 | setMap: function(map) { |
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201 | if (this.vectorMode) { |
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202 | OpenLayers.Layer.Vector.prototype.setMap.apply(this, arguments); |
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203 | |
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204 | var options = { |
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205 | 'extractAttributes': this.extractAttributes |
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206 | }; |
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207 | |
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208 | OpenLayers.Util.extend(options, this.formatOptions); |
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209 | if (this.map && !this.projection.equals(this.map.getProjectionObject())) { |
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210 | options.externalProjection = this.projection; |
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211 | options.internalProjection = this.map.getProjectionObject(); |
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212 | } |
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213 | |
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214 | this.formatObject = this.format ? new this.format(options) : new OpenLayers.Format.GML(options); |
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215 | } else { |
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216 | OpenLayers.Layer.Markers.prototype.setMap.apply(this, arguments); |
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217 | } |
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218 | }, |
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219 | |
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220 | /** |
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221 | * Method: moveTo |
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222 | * |
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223 | * Parameters: |
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224 | * bounds - {<OpenLayers.Bounds>} |
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225 | * zoomChanged - {Boolean} |
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226 | * dragging - {Boolean} |
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227 | */ |
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228 | moveTo:function(bounds, zoomChanged, dragging) { |
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229 | if (this.vectorMode) { |
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230 | OpenLayers.Layer.Vector.prototype.moveTo.apply(this, arguments); |
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231 | } else { |
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232 | OpenLayers.Layer.Markers.prototype.moveTo.apply(this, arguments); |
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233 | } |
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234 | |
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235 | // don't load wfs features while dragging, wait for drag end |
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236 | if (dragging) { |
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237 | // TBD try to hide the vector layer while dragging |
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238 | // this.setVisibility(false); |
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239 | // this will probably help for panning performances |
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240 | return false; |
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241 | } |
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242 | |
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243 | if ( zoomChanged ) { |
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244 | if (this.vectorMode) { |
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245 | this.renderer.clear(); |
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246 | } |
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247 | } |
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248 | |
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249 | //DEPRECATED - REMOVE IN 3.0 |
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250 | // don't load data if current zoom level doesn't match |
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251 | if (this.options.minZoomLevel) { |
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252 | OpenLayers.Console.warn(OpenLayers.i18n('minZoomLevelError')); |
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253 | |
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254 | if (this.map.getZoom() < this.options.minZoomLevel) { |
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255 | return null; |
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256 | } |
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257 | } |
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258 | |
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259 | if (bounds == null) { |
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260 | bounds = this.map.getExtent(); |
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261 | } |
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262 | |
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263 | var firstRendering = (this.tile == null); |
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264 | |
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265 | //does the new bounds to which we need to move fall outside of the |
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266 | // current tile's bounds? |
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267 | var outOfBounds = (!firstRendering && |
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268 | !this.tile.bounds.containsBounds(bounds)); |
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269 | |
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270 | if (zoomChanged || firstRendering || (!dragging && outOfBounds)) { |
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271 | //determine new tile bounds |
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272 | var center = bounds.getCenterLonLat(); |
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273 | var tileWidth = bounds.getWidth() * this.ratio; |
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274 | var tileHeight = bounds.getHeight() * this.ratio; |
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275 | var tileBounds = |
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276 | new OpenLayers.Bounds(center.lon - (tileWidth / 2), |
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277 | center.lat - (tileHeight / 2), |
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278 | center.lon + (tileWidth / 2), |
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279 | center.lat + (tileHeight / 2)); |
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280 | |
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281 | //determine new tile size |
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282 | var tileSize = this.map.getSize(); |
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283 | tileSize.w = tileSize.w * this.ratio; |
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284 | tileSize.h = tileSize.h * this.ratio; |
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285 | |
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286 | //determine new position (upper left corner of new bounds) |
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287 | var ul = new OpenLayers.LonLat(tileBounds.left, tileBounds.top); |
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288 | var pos = this.map.getLayerPxFromLonLat(ul); |
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289 | |
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290 | //formulate request url string |
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291 | var url = this.getFullRequestString(); |
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292 | |
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293 | var params = null; |
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294 | |
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295 | // Cant combine "filter" and "BBOX". This is a cheap hack to help |
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296 | // people out who can't migrate to the WFS protocol immediately. |
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297 | var filter = this.params.filter || this.params.FILTER; |
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298 | if (filter) { |
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299 | params = {FILTER: filter}; |
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300 | } |
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301 | else { |
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302 | params = {BBOX: this.encodeBBOX ? tileBounds.toBBOX() |
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303 | : tileBounds.toArray()}; |
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304 | } |
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305 | |
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306 | if (this.map && !this.projection.equals(this.map.getProjectionObject())) { |
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307 | var projectedBounds = tileBounds.clone(); |
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308 | projectedBounds.transform(this.map.getProjectionObject(), |
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309 | this.projection); |
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310 | if (!filter){ |
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311 | params.BBOX = this.encodeBBOX ? projectedBounds.toBBOX() |
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312 | : projectedBounds.toArray(); |
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313 | } |
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314 | } |
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315 | |
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316 | url += "&" + OpenLayers.Util.getParameterString(params); |
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317 | |
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318 | if (!this.tile) { |
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319 | this.tile = new OpenLayers.Tile.WFS(this, pos, tileBounds, |
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320 | url, tileSize); |
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321 | this.addTileMonitoringHooks(this.tile); |
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322 | this.tile.draw(); |
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323 | } else { |
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324 | if (this.vectorMode) { |
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325 | this.destroyFeatures(); |
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326 | this.renderer.clear(); |
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327 | } else { |
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328 | this.clearMarkers(); |
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329 | } |
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330 | this.removeTileMonitoringHooks(this.tile); |
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331 | this.tile.destroy(); |
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332 | |
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333 | this.tile = null; |
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334 | this.tile = new OpenLayers.Tile.WFS(this, pos, tileBounds, |
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335 | url, tileSize); |
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336 | this.addTileMonitoringHooks(this.tile); |
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337 | this.tile.draw(); |
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338 | } |
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339 | } |
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340 | }, |
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341 | |
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342 | /** |
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343 | * Method: addTileMonitoringHooks |
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344 | * This function takes a tile as input and adds the appropriate hooks to |
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345 | * the tile so that the layer can keep track of the loading tile |
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346 | * (making sure to check that the tile is always the layer's current |
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347 | * tile before taking any action). |
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348 | * |
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349 | * Parameters: |
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350 | * tile - {<OpenLayers.Tile>} |
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351 | */ |
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352 | addTileMonitoringHooks: function(tile) { |
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353 | tile.onLoadStart = function() { |
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354 | //if this is the the layer's current tile, then trigger |
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355 | // a 'loadstart' |
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356 | if (this == this.layer.tile) { |
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357 | this.layer.events.triggerEvent("loadstart"); |
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358 | } |
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359 | }; |
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360 | tile.events.register("loadstart", tile, tile.onLoadStart); |
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361 | |
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362 | tile.onLoadEnd = function() { |
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363 | //if this is the the layer's current tile, then trigger |
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364 | // a 'tileloaded' and 'loadend' |
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365 | if (this == this.layer.tile) { |
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366 | this.layer.events.triggerEvent("tileloaded"); |
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367 | this.layer.events.triggerEvent("loadend"); |
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368 | } |
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369 | }; |
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370 | tile.events.register("loadend", tile, tile.onLoadEnd); |
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371 | tile.events.register("unload", tile, tile.onLoadEnd); |
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372 | }, |
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373 | |
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374 | /** |
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375 | * Method: removeTileMonitoringHooks |
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376 | * This function takes a tile as input and removes the tile hooks |
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377 | * that were added in addTileMonitoringHooks() |
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378 | * |
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379 | * Parameters: |
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380 | * tile - {<OpenLayers.Tile>} |
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381 | */ |
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382 | removeTileMonitoringHooks: function(tile) { |
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383 | tile.unload(); |
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384 | tile.events.un({ |
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385 | "loadstart": tile.onLoadStart, |
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386 | "loadend": tile.onLoadEnd, |
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387 | "unload": tile.onLoadEnd, |
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388 | scope: tile |
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389 | }); |
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390 | }, |
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391 | |
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392 | /** |
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393 | * Method: onMapResize |
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394 | * Call the onMapResize method of the appropriate parent class. |
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395 | */ |
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396 | onMapResize: function() { |
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397 | if(this.vectorMode) { |
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398 | OpenLayers.Layer.Vector.prototype.onMapResize.apply(this, |
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399 | arguments); |
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400 | } else { |
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401 | OpenLayers.Layer.Markers.prototype.onMapResize.apply(this, |
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402 | arguments); |
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403 | } |
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404 | }, |
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405 | |
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406 | /** |
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407 | * Method: display |
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408 | * Call the display method of the appropriate parent class. |
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409 | */ |
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410 | display: function() { |
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411 | if(this.vectorMode) { |
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412 | OpenLayers.Layer.Vector.prototype.display.apply(this, |
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413 | arguments); |
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414 | } else { |
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415 | OpenLayers.Layer.Markers.prototype.display.apply(this, |
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416 | arguments); |
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417 | } |
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418 | }, |
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419 | |
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420 | /** |
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421 | * APIMethod: mergeNewParams |
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422 | * Modify parameters for the layer and redraw. |
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423 | * |
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424 | * Parameters: |
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425 | * newParams - {Object} |
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426 | */ |
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427 | mergeNewParams:function(newParams) { |
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428 | var upperParams = OpenLayers.Util.upperCaseObject(newParams); |
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429 | var newArguments = [upperParams]; |
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430 | return OpenLayers.Layer.HTTPRequest.prototype.mergeNewParams.apply(this, |
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431 | newArguments); |
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432 | }, |
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433 | |
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434 | /** |
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435 | * APIMethod: clone |
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436 | * |
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437 | * Parameters: |
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438 | * obj - {Object} |
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439 | * |
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440 | * Returns: |
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441 | * {<OpenLayers.Layer.WFS>} An exact clone of this OpenLayers.Layer.WFS |
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442 | */ |
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443 | clone: function (obj) { |
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444 | |
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445 | if (obj == null) { |
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446 | obj = new OpenLayers.Layer.WFS(this.name, |
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447 | this.url, |
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448 | this.params, |
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449 | this.getOptions()); |
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450 | } |
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451 | |
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452 | //get all additions from superclasses |
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453 | if (this.vectorMode) { |
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454 | obj = OpenLayers.Layer.Vector.prototype.clone.apply(this, [obj]); |
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455 | } else { |
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456 | obj = OpenLayers.Layer.Markers.prototype.clone.apply(this, [obj]); |
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457 | } |
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458 | |
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459 | // copy/set any non-init, non-simple values here |
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460 | |
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461 | return obj; |
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462 | }, |
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463 | |
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464 | /** |
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465 | * APIMethod: getFullRequestString |
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466 | * combine the layer's url with its params and these newParams. |
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467 | * |
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468 | * Add the SRS parameter from 'projection' -- this is probably |
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469 | * more eloquently done via a setProjection() method, but this |
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470 | * works for now and always. |
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471 | * |
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472 | * Parameters: |
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473 | * newParams - {Object} |
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474 | * altUrl - {String} Use this as the url instead of the layer's url |
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475 | */ |
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476 | getFullRequestString:function(newParams, altUrl) { |
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477 | var projectionCode = this.projection.getCode() || this.map.getProjection(); |
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478 | this.params.SRS = (projectionCode == "none") ? null : projectionCode; |
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479 | |
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480 | return OpenLayers.Layer.Grid.prototype.getFullRequestString.apply( |
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481 | this, arguments); |
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482 | }, |
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483 | |
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484 | /** |
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485 | * APIMethod: commit |
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486 | * Write out the data to a WFS server. |
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487 | */ |
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488 | commit: function() { |
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489 | if (!this.writer) { |
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490 | var options = {}; |
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491 | if (this.map && !this.projection.equals(this.map.getProjectionObject())) { |
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492 | options.externalProjection = this.projection; |
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493 | options.internalProjection = this.map.getProjectionObject(); |
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494 | } |
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495 | |
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496 | this.writer = new OpenLayers.Format.WFS(options,this); |
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497 | } |
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498 | |
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499 | var data = this.writer.write(this.features); |
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500 | |
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501 | OpenLayers.Request.POST({ |
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502 | url: this.url, |
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503 | data: data, |
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504 | success: this.commitSuccess, |
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505 | failure: this.commitFailure, |
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506 | scope: this |
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507 | }); |
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508 | }, |
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509 | |
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510 | /** |
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511 | * Method: commitSuccess |
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512 | * Called when the Ajax request returns a response |
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513 | * |
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514 | * Parameters: |
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515 | * response - {XmlNode} from server |
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516 | */ |
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517 | commitSuccess: function(request) { |
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518 | var response = request.responseText; |
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519 | if (response.indexOf('SUCCESS') != -1) { |
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520 | this.commitReport(OpenLayers.i18n("commitSuccess", {'response':response})); |
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521 | |
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522 | for(var i = 0; i < this.features.length; i++) { |
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523 | this.features[i].state = null; |
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524 | } |
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525 | // TBD redraw the layer or reset the state of features |
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526 | // foreach features: set state to null |
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527 | } else if (response.indexOf('FAILED') != -1 || |
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528 | response.indexOf('Exception') != -1) { |
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529 | this.commitReport(OpenLayers.i18n("commitFailed", {'response':response})); |
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530 | } |
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531 | }, |
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532 | |
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533 | /** |
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534 | * Method: commitFailure |
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535 | * Called when the Ajax request fails |
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536 | * |
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537 | * Parameters: |
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538 | * response - {XmlNode} from server |
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539 | */ |
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540 | commitFailure: function(request) {}, |
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541 | |
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542 | /** |
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543 | * APIMethod: commitReport |
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544 | * Called with a 'success' message if the commit succeeded, otherwise |
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545 | * a failure message, and the full request text as a second parameter. |
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546 | * Override this function to provide custom transaction reporting. |
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547 | * |
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548 | * string - {String} reporting string |
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549 | * response - {String} full XML response |
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550 | */ |
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551 | commitReport: function(string, response) { |
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552 | OpenLayers.Console.userError(string); |
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553 | }, |
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554 | |
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555 | |
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556 | /** |
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557 | * APIMethod: refresh |
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558 | * Refreshes all the features of the layer |
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559 | */ |
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560 | refresh: function() { |
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561 | if (this.tile) { |
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562 | if (this.vectorMode) { |
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563 | this.renderer.clear(); |
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564 | this.features.length = 0; |
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565 | } else { |
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566 | this.clearMarkers(); |
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567 | this.markers.length = 0; |
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568 | } |
---|
569 | this.tile.draw(); |
---|
570 | } |
---|
571 | }, |
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572 | |
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573 | /** |
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574 | * APIMethod: getDataExtent |
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575 | * Calculates the max extent which includes all of the layer data. |
---|
576 | * |
---|
577 | * Returns: |
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578 | * {<OpenLayers.Bounds>} |
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579 | */ |
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580 | getDataExtent: function () { |
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581 | var extent; |
---|
582 | //get all additions from superclasses |
---|
583 | if (this.vectorMode) { |
---|
584 | extent = OpenLayers.Layer.Vector.prototype.getDataExtent.apply(this); |
---|
585 | } else { |
---|
586 | extent = OpenLayers.Layer.Markers.prototype.getDataExtent.apply(this); |
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587 | } |
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588 | |
---|
589 | return extent; |
---|
590 | }, |
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591 | |
---|
592 | /** |
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593 | * APIMethod: setOpacity |
---|
594 | * Call the setOpacity method of the appropriate parent class to set the |
---|
595 | * opacity. |
---|
596 | * |
---|
597 | * Parameter: |
---|
598 | * opacity - {Float} |
---|
599 | */ |
---|
600 | setOpacity: function (opacity) { |
---|
601 | if (this.vectorMode) { |
---|
602 | OpenLayers.Layer.Vector.prototype.setOpacity.apply(this, [opacity]); |
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603 | } else { |
---|
604 | OpenLayers.Layer.Markers.prototype.setOpacity.apply(this, [opacity]); |
---|
605 | } |
---|
606 | }, |
---|
607 | |
---|
608 | CLASS_NAME: "OpenLayers.Layer.WFS" |
---|
609 | }); |
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