all files / ol/render/ feature.js

100% Statements 44/44
100% Branches 4/4
100% Functions 11/11
100% Lines 44/44
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                                         10105×           10105×           10105×           10105×           10105×           10105×             10105×                                 5450×                                                       7973×                               30588×                                           7964×                           7974×                   6643× 6643× 6643× 6643× 6643×       6643×      
goog.provide('ol.render.Feature');
 
goog.require('ol');
goog.require('ol.extent');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.flat.transform');
goog.require('ol.transform');
 
 
/**
 * Lightweight, read-only, {@link ol.Feature} and {@link ol.geom.Geometry} like
 * structure, optimized for vector tile rendering and styling. Geometry access
 * through the API is limited to getting the type and extent of the geometry.
 *
 * @constructor
 * @param {ol.geom.GeometryType} type Geometry type.
 * @param {Array.<number>} flatCoordinates Flat coordinates. These always need
 *     to be right-handed for polygons.
 * @param {Array.<number>|Array.<Array.<number>>} ends Ends or Endss.
 * @param {Object.<string, *>} properties Properties.
 * @param {number|string|undefined} id Feature id.
 */
ol.render.Feature = function(type, flatCoordinates, ends, properties, id) {
  /**
   * @private
   * @type {ol.Extent|undefined}
   */
  this.extent_;
 
  /**
   * @private
   * @type {number|string|undefined}
   */
  this.id_ = id;
 
  /**
   * @private
   * @type {ol.geom.GeometryType}
   */
  this.type_ = type;
 
  /**
   * @private
   * @type {Array.<number>}
   */
  this.flatCoordinates_ = flatCoordinates;
 
  /**
   * @private
   * @type {Array.<number>|Array.<Array.<number>>}
   */
  this.ends_ = ends;
 
  /**
   * @private
   * @type {Object.<string, *>}
   */
  this.properties_ = properties;
 
 
  /**
   * @private
   * @type {ol.Transform}
   */
  this.tmpTransform_ = ol.transform.create();
};
 
 
/**
 * Get a feature property by its key.
 * @param {string} key Key
 * @return {*} Value for the requested key.
 * @api
 */
ol.render.Feature.prototype.get = function(key) {
  return this.properties_[key];
};
 
 
/**
 * @return {Array.<number>|Array.<Array.<number>>} Ends or endss.
 */
ol.render.Feature.prototype.getEnds =
ol.render.Feature.prototype.getEndss = function() {
  return this.ends_;
};
 
 
/**
 * Get the extent of this feature's geometry.
 * @return {ol.Extent} Extent.
 * @api
 */
ol.render.Feature.prototype.getExtent = function() {
  if (!this.extent_) {
    this.extent_ = this.type_ === ol.geom.GeometryType.POINT ?
      ol.extent.createOrUpdateFromCoordinate(this.flatCoordinates_) :
      ol.extent.createOrUpdateFromFlatCoordinates(
          this.flatCoordinates_, 0, this.flatCoordinates_.length, 2);
 
  }
  return this.extent_;
};
 
/**
 * Get the feature identifier.  This is a stable identifier for the feature and
 * is set when reading data from a remote source.
 * @return {number|string|undefined} Id.
 * @api
 */
ol.render.Feature.prototype.getId = function() {
  return this.id_;
};
 
 
/**
 * @return {Array.<number>} Flat coordinates.
 */
ol.render.Feature.prototype.getOrientedFlatCoordinates = function() {
  return this.flatCoordinates_;
};
 
 
/**
 * @return {Array.<number>} Flat coordinates.
 */
ol.render.Feature.prototype.getFlatCoordinates =
    ol.render.Feature.prototype.getOrientedFlatCoordinates;
 
 
/**
 * For API compatibility with {@link ol.Feature}, this method is useful when
 * determining the geometry type in style function (see {@link #getType}).
 * @return {ol.render.Feature} Feature.
 * @api
 */
ol.render.Feature.prototype.getGeometry = function() {
  return this;
};
 
 
/**
 * Get the feature properties.
 * @return {Object.<string, *>} Feature properties.
 * @api
 */
ol.render.Feature.prototype.getProperties = function() {
  return this.properties_;
};
 
 
/**
 * Get the feature for working with its geometry.
 * @return {ol.render.Feature} Feature.
 */
ol.render.Feature.prototype.getSimplifiedGeometry =
    ol.render.Feature.prototype.getGeometry;
 
 
/**
 * @return {number} Stride.
 */
ol.render.Feature.prototype.getStride = function() {
  return 2;
};
 
 
/**
 * @return {undefined}
 */
ol.render.Feature.prototype.getStyleFunction = ol.nullFunction;
 
 
/**
 * Get the type of this feature's geometry.
 * @return {ol.geom.GeometryType} Geometry type.
 * @api
 */
ol.render.Feature.prototype.getType = function() {
  return this.type_;
};
 
/**
 * Transform geometry coordinates from tile pixel space to projected.
 * The SRS of the source and destination are expected to be the same.
 *
 * @param {ol.ProjectionLike} source The current projection
 * @param {ol.ProjectionLike} destination The desired projection.
 */
ol.render.Feature.prototype.transform = function(source, destination) {
  var pixelExtent = source.getExtent();
  var projectedExtent = source.getWorldExtent();
  var scale = ol.extent.getHeight(projectedExtent) / ol.extent.getHeight(pixelExtent);
  var transform = this.tmpTransform_;
  ol.transform.compose(transform,
      projectedExtent[0], projectedExtent[3],
      scale, -scale, 0,
      0, 0);
  ol.geom.flat.transform.transform2D(this.flatCoordinates_, 0, this.flatCoordinates_.length, 2,
      transform, this.flatCoordinates_);
};