Add ol.geom.GeometryCollection

src/ol/geom/geometrycollection.js

@@ -0,0 +1,204 @@
+goog.provide('ol.geom.GeometryCollection');
+
+goog.require('goog.array');
+goog.require('goog.asserts');
+goog.require('goog.object');
+goog.require('ol.extent');
+goog.require('ol.geom.Geometry');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.geom.Geometry}
+ * @param {Array.<ol.geom.Geometry>=} opt_geometries Geometries.
+ */
+ol.geom.GeometryCollection = function(opt_geometries) {
+
+  goog.base(this);
+
+  /**
+   * @private
+   * @type {Array.<ol.geom.Geometry>}
+   */
+  this.geometries_ = goog.isDef(opt_geometries) ? opt_geometries : null;
+
+};
+goog.inherits(ol.geom.GeometryCollection, ol.geom.Geometry);
+
+
+/**
+ * @param {Array.<ol.geom.Geometry>} geometries Geometries.
+ * @private
+ * @return {Array.<ol.geom.Geometry>} Cloned geometries.
+ */
+ol.geom.GeometryCollection.cloneGeometries_ = function(geometries) {
+  var clonedGeometries = [];
+  var i, ii;
+  for (i = 0, ii = geometries.length; i < ii; ++i) {
+    clonedGeometries.push(geometries[i].clone());
+  }
+  return clonedGeometries;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.clone = function() {
+  var geometryCollection = new ol.geom.GeometryCollection(null);
+  geometryCollection.setGeometries(this.geometries_);
+  return geometryCollection;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.closestPointXY =
+    function(x, y, closestPoint, minSquaredDistance) {
+  if (minSquaredDistance <
+      ol.extent.closestSquaredDistanceXY(this.getExtent(), x, y)) {
+    return minSquaredDistance;
+  }
+  var geometries = this.geometries_;
+  var i, ii;
+  for (i = 0, ii = geometries.length; i < ii; ++i) {
+    minSquaredDistance = geometries[i].closestPointXY(
+        x, y, closestPoint, minSquaredDistance);
+  }
+  return minSquaredDistance;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.containsXY = function(x, y) {
+  var geometries = this.geometries_;
+  var i, ii;
+  for (i = 0, ii = geometries.length; i < ii; ++i) {
+    if (geometries[i].containsXY(x, y)) {
+      return true;
+    }
+  }
+  return false;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.getExtent = function(opt_extent) {
+  if (this.extentRevision != this.revision) {
+    var extent = ol.extent.createOrUpdateEmpty(this.extent);
+    var geometries = this.geometries_;
+    var i, ii;
+    for (i = 0, ii = geometries.length; i < ii; ++i) {
+      ol.extent.extend(extent, geometries[i].getExtent());
+    }
+    this.extent = extent;
+    this.extentRevision = this.revision;
+  }
+  goog.asserts.assert(goog.isDef(this.extent));
+  return ol.extent.returnOrUpdate(this.extent, opt_extent);
+};
+
+
+/**
+ * @return {Array.<ol.geom.Geometry>} Geometries.
+ */
+ol.geom.GeometryCollection.prototype.getGeometries = function() {
+  return ol.geom.GeometryCollection.cloneGeometries_(this.geometries_);
+};
+
+
+/**
+ * @return {Array.<ol.geom.Geometry>} Geometries.
+ */
+ol.geom.GeometryCollection.prototype.getGeometriesArray = function() {
+  return this.geometries_;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.getSimplifiedGeometry =
+    function(squaredTolerance) {
+  if (this.simplifiedGeometryRevision != this.revision) {
+    goog.object.clear(this.simplifiedGeometryCache);
+    this.simplifiedGeometryMaxMinSquaredTolerance = 0;
+    this.simplifiedGeometryRevision = this.revision;
+  }
+  if (squaredTolerance < 0 ||
+      (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&
+       squaredTolerance < this.simplifiedGeometryMaxMinSquaredTolerance)) {
+    return this;
+  }
+  var key = squaredTolerance.toString();
+  if (this.simplifiedGeometryCache.hasOwnProperty(key)) {
+    return this.simplifiedGeometryCache[key];
+  } else {
+    var simplifiedGeometries = [];
+    var geometries = this.geometries_;
+    var simplified = false;
+    var i, ii;
+    for (i = 0, ii = geometries.length; i < ii; ++i) {
+      var geometry = geometries[i];
+      var simplifiedGeometry = geometry.getSimplifiedGeometry(squaredTolerance);
+      simplifiedGeometries.push(simplifiedGeometry);
+      if (simplifiedGeometry !== geometry) {
+        simplified = true;
+      }
+    }
+    if (simplified) {
+      var simplifiedGeometryCollection = new ol.geom.GeometryCollection(null);
+      simplifiedGeometryCollection.setGeometriesArray(simplifiedGeometries);
+      this.simplifiedGeometryCache[key] = simplifiedGeometryCollection;
+      return simplifiedGeometryCollection;
+    } else {
+      this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;
+      return this;
+    }
+  }
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.getType = function() {
+  return ol.geom.GeometryType.GEOMETRY_COLLECTION;
+};
+
+
+/**
+ * @param {Array.<ol.geom.Geometry>} geometries Geometries.
+ */
+ol.geom.GeometryCollection.prototype.setGeometries = function(geometries) {
+  this.setGeometriesArray(
+      ol.geom.GeometryCollection.cloneGeometries_(geometries));
+};
+
+
+/**
+ * @param {Array.<ol.geom.Geometry>} geometries Geometries.
+ */
+ol.geom.GeometryCollection.prototype.setGeometriesArray = function(geometries) {
+  this.geometries_ = geometries;
+  this.dispatchChangeEvent();
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.geom.GeometryCollection.prototype.transform = function(transformFn) {
+  var geometries = this.geometries_;
+  var i, ii;
+  for (i = 0, ii = geometries.length; i < ii; ++i) {
+    geometries[i].transform(transformFn);
+  }
+  this.dispatchChangeEvent();
+};