openlayers

<!doctype html> <html lang="en"> <head> <title>Code coverage report for ol/layer/heatmaplayer.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../../index.html">all files</a> / <a href="index.html">ol/layer/</a> heatmaplayer.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 76.99% Statements 87/113 </div> <div class='fl pad1y space-right2'> 40.91% Branches 9/22 </div> <div class='fl pad1y space-right2'> 78.57% Functions 11/14 </div> <div class='fl pad1y space-right2'> 76.99% Lines 87/113 </div> </div> </div> <div class='status-line medium'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301</td><td class="line-coverage quiet">1×   1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1×           1×                                         1× 1×   1×   1× 1× 1× 1× 1× 1×           1×           1×           1×           1×   1×       1×     1×   1×   1×         1×   1× 1× 1× 1×           1×     1×                                                 1×   1×       1×             1×               1× 1× 1× 1×   1× 1× 1× 5×     1× 1×   1×               1× 1× 1× 1×   1× 1× 1× 1× 1× 1× 1× 1× 1× 1× 1×                   1× 1×                   1× 1×                     1× 1×             1× 1×             1× 1× 1× 1×               1×                                                     1× 1×                   1× 1×                   1× 1×    </td><td class="text"><pre class="prettyprint lang-js">goog.provide('ol.layer.Heatmap');   goog.require('goog.asserts'); goog.require('goog.events'); goog.require('goog.object'); goog.require('ol'); goog.require('ol.Object'); goog.require('ol.dom'); goog.require('ol.layer.Vector'); goog.require('ol.math'); goog.require('ol.render.EventType'); goog.require('ol.style.Icon'); goog.require('ol.style.Style');     /** * @enum {string} */ ol.layer.HeatmapLayerProperty = { BLUR: 'blur', GRADIENT: 'gradient', RADIUS: 'radius' };       /** * @classdesc * Layer for rendering vector data as a heatmap. * Note that any property set in the options is set as a {@link ol.Object} * property on the layer object; for example, setting `title: 'My Title'` in the * options means that `title` is observable, and has get/set accessors. * * @constructor * @extends {ol.layer.Vector} * @fires ol.render.Event * @param {olx.layer.HeatmapOptions=} opt_options Options. * @api */ ol.layer.Heatmap = function(opt_options) { var options = opt_options ? opt_options : {};   var baseOptions = goog.object.clone(options);   delete baseOptions.gradient; delete baseOptions.radius; delete baseOptions.blur; delete baseOptions.shadow; delete baseOptions.weight; goog.base(this, /** @type {olx.layer.VectorOptions} */ (baseOptions));   /** * @private * @type {Uint8ClampedArray} */ this.gradient_ = null;   /** * @private * @type {number} */ this.shadow_ = options.shadow !== undefined ? options.shadow : 250;   /** * @private * @type {string|undefined} */ this.circleImage_ = undefined;   /** * @private * @type {Array.<Array.<ol.style.Style>>} */ this.styleCache_ = null;   goog.events.listen(this, ol.Object.getChangeEventType(ol.layer.HeatmapLayerProperty.GRADIENT), this.handleGradientChanged_, false, this);   this.setGradient(options.gradient ? options.gradient : ol.layer.Heatmap.DEFAULT_GRADIENT);   this.setBlur(options.blur !== undefined ? options.blur : 15);   this.setRadius(options.radius !== undefined ? options.radius : 8);   goog.events.listen(this, [ ol.Object.getChangeEventType(ol.layer.HeatmapLayerProperty.BLUR), ol.Object.getChangeEventType(ol.layer.HeatmapLayerProperty.RADIUS) ], this.handleStyleChanged_, false, this);   this.handleStyleChanged_();   var weight = options.weight ? options.weight : 'weight'; var weightFunction; Eif (goog.isString(weight)) { weightFunction = function(feature) { return feature.get(weight); }; } else { weightFunction = weight; } goog.asserts.assert(goog.isFunction(weightFunction), 'weightFunction should be a function');   this.setStyle(goog.bind(function(feature, resolution) { goog.asserts.assert(this.styleCache_, 'this.styleCache_ expected'); goog.asserts.assert(this.circleImage_ !== undefined, 'this.circleImage_ should be defined'); var weight = weightFunction(feature); var opacity = weight !== undefined ? ol.math.clamp(weight, 0, 1) : 1; // cast to 8 bits var index = (255 * opacity) | 0; var style = this.styleCache_[index]; if (!style) { style = [ new ol.style.Style({ image: new ol.style.Icon({ opacity: opacity, src: this.circleImage_ }) }) ]; this.styleCache_[index] = style; } return style; }, this));   // For performance reasons, don't sort the features before rendering. // The render order is not relevant for a heatmap representation. this.setRenderOrder(null);   goog.events.listen(this, ol.render.EventType.RENDER, this.handleRender_, false, this);   }; goog.inherits(ol.layer.Heatmap, ol.layer.Vector);     /** * @const * @type {Array.<string>} */ ol.layer.Heatmap.DEFAULT_GRADIENT = ['#00f', '#0ff', '#0f0', '#ff0', '#f00'];     /** * @param {Array.<string>} colors * @return {Uint8ClampedArray} * @private */ ol.layer.Heatmap.createGradient_ = function(colors) { var width = 1; var height = 256; var context = ol.dom.createCanvasContext2D(width, height);   var gradient = context.createLinearGradient(0, 0, width, height); var step = 1 / (colors.length - 1); for (var i = 0, ii = colors.length; i < ii; ++i) { gradient.addColorStop(i * step, colors[i]); }   context.fillStyle = gradient; context.fillRect(0, 0, width, height);   return context.getImageData(0, 0, width, height).data; };     /** * @return {string} * @private */ ol.layer.Heatmap.prototype.createCircle_ = function() { var radius = this.getRadius(); var blur = this.getBlur(); goog.asserts.assert(radius !== undefined && blur !== undefined, 'radius and blur should be defined'); var halfSize = radius + blur + 1; var size = 2 * halfSize; var context = ol.dom.createCanvasContext2D(size, size); context.shadowOffsetX = context.shadowOffsetY = this.shadow_; context.shadowBlur = blur; context.shadowColor = '#000'; context.beginPath(); var center = halfSize - this.shadow_; context.arc(center, center, radius, 0, Math.PI * 2, true); context.fill(); return context.canvas.toDataURL(); };     /** * Return the blur size in pixels. * @return {number} Blur size in pixels. * @api * @observable */ ol.layer.Heatmap.prototype.getBlur = function() { return /** @type {number} */ (this.get(ol.layer.HeatmapLayerProperty.BLUR)); };     /** * Return the gradient colors as array of strings. * @return {Array.<string>} Colors. * @api * @observable */ ol.layer.Heatmap.prototype.getGradient = function() { return /** @type {Array.<string>} */ ( this.get(ol.layer.HeatmapLayerProperty.GRADIENT)); };     /** * Return the size of the radius in pixels. * @return {number} Radius size in pixel. * @api * @observable */ ol.layer.Heatmap.prototype.getRadius = function() { return /** @type {number} */ (this.get(ol.layer.HeatmapLayerProperty.RADIUS)); };     /** * @private */ ol.layer.Heatmap.prototype.handleGradientChanged_ = function() { this.gradient_ = ol.layer.Heatmap.createGradient_(this.getGradient()); };     /** * @private */ ol.layer.Heatmap.prototype.handleStyleChanged_ = function() { this.circleImage_ = this.createCircle_(); this.styleCache_ = new Array(256); this.changed(); };     /** * @param {ol.render.Event} event Post compose event * @private */ ol.layer.Heatmap.prototype.handleRender_ = function(event) { goog.asserts.assert(event.type == ol.render.EventType.RENDER, 'event.type should be RENDER'); goog.asserts.assert(this.gradient_, 'this.gradient_ expected'); var context = event.context; var canvas = context.canvas; var image = context.getImageData(0, 0, canvas.width, canvas.height); var view8 = image.data; var i, ii, alpha; for (i = 0, ii = view8.length; i < ii; i += 4) { alpha = view8[i + 3] * 4; if (alpha) { view8[i] = this.gradient_[alpha]; view8[i + 1] = this.gradient_[alpha + 1]; view8[i + 2] = this.gradient_[alpha + 2]; } } context.putImageData(image, 0, 0); };     /** * Set the blur size in pixels. * @param {number} blur Blur size in pixels. * @api * @observable */ ol.layer.Heatmap.prototype.setBlur = function(blur) { this.set(ol.layer.HeatmapLayerProperty.BLUR, blur); };     /** * Set the gradient colors as array of strings. * @param {Array.<string>} colors Gradient. * @api * @observable */ ol.layer.Heatmap.prototype.setGradient = function(colors) { this.set(ol.layer.HeatmapLayerProperty.GRADIENT, colors); };     /** * Set the size of the radius in pixels. * @param {number} radius Radius size in pixel. * @api * @observable */ ol.layer.Heatmap.prototype.setRadius = function(radius) { this.set(ol.layer.HeatmapLayerProperty.RADIUS, radius); };  </pre></td></tr> </table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="http://istanbul-js.org/" target="_blank">istanbul</a> at Fri Nov 06 2015 19:36:11 GMT+0100 (CET) </div> </div> <script src="../../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); 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