Add ol.source.VectorFile

2013-12-04 18:36:33 +01:00
parent 514ebb752b
commit 28c7ecc014
3 changed files with 140 additions and 0 deletions
--- a/src/ol/source/vectorfilesource.js
+++ b/src/ol/source/vectorfilesource.js
@@ -0,0 +1,125 @@
+// FIXME remove reprojectTo
+
+goog.provide('ol.source.VectorFile');
+
+goog.require('goog.asserts');
+goog.require('goog.net.XhrIo');
+goog.require('ol.format.FormatType');
+goog.require('ol.proj');
+goog.require('ol.source.State');
+goog.require('ol.source.Vector');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.source.Vector}
+ * @param {ol.source.VectorFileOptions=} opt_options Options.
+ */
+ol.source.VectorFile = function(opt_options) {
+
+  var options = goog.isDef(opt_options) ? opt_options : {};
+
+  goog.base(this, {
+    attributions: options.attributions,
+    extent: options.extent,
+    logo: options.logo,
+    projection: options.projection
+  });
+
+  /**
+   * @type {ol.format.Format}
+   * @protected
+   */
+  this.format = options.format;
+
+  /**
+   * @type {ol.proj.Projection}
+   * @private
+   */
+  this.reprojectTo_ = goog.isDef(options.reprojectTo) ?
+      ol.proj.get(options.reprojectTo) : ol.proj.get('EPSG:3857');
+
+  if (goog.isDef(options.doc)) {
+    this.readFeatures_(options.doc);
+  }
+
+  if (goog.isDef(options.node)) {
+    this.readFeatures_(options.node);
+  }
+
+  if (goog.isDef(options.object)) {
+    this.readFeatures_(options.object);
+  }
+
+  if (goog.isDef(options.text)) {
+    this.readFeatures_(options.text);
+  }
+
+  if (goog.isDef(options.url)) {
+    this.setState(ol.source.State.LOADING);
+    goog.net.XhrIo.send(options.url, goog.bind(this.handleXhrIo_, this));
+  }
+
+};
+goog.inherits(ol.source.VectorFile, ol.source.Vector);
+
+
+/**
+ * @param {Event} event Event.
+ * @private
+ */
+ol.source.VectorFile.prototype.handleXhrIo_ = function(event) {
+  var xhrIo = /** @type {goog.net.XhrIo} */ (event.target);
+  if (xhrIo.isSuccess()) {
+    var type = this.format.getType();
+    /** @type {Document|Node|Object|string|undefined} */
+    var source;
+    if (type == ol.format.FormatType.BINARY) {
+      // FIXME
+    } else if (type == ol.format.FormatType.JSON) {
+      source = xhrIo.getResponseJson();
+    } else if (type == ol.format.FormatType.TEXT) {
+      source = xhrIo.getResponseText();
+    } else if (type == ol.format.FormatType.XML) {
+      source = xhrIo.getResponseXml();
+    } else {
+      goog.asserts.fail();
+    }
+    if (goog.isDef(source)) {
+      this.readFeatures_(source);
+    } else {
+      goog.asserts.fail();
+      this.setState(ol.source.State.ERROR);
+    }
+  } else {
+    this.setState(ol.source.State.ERROR);
+  }
+};
+
+
+/**
+ * @param {Document|Node|Object|string} source Source.
+ * @private
+ */
+ol.source.VectorFile.prototype.readFeatures_ = function(source) {
+  var format = this.format;
+  var features = format.readFeatures(source);
+  var featureProjection = format.readProjection(source);
+  var transform;
+  if (!ol.proj.equivalent(featureProjection, this.reprojectTo_)) {
+    transform = ol.proj.getTransform(featureProjection, this.reprojectTo_);
+  } else {
+    transform = null;
+  }
+  var i, ii;
+  for (i = 0, ii = features.length; i < ii; ++i) {
+    var feature = features[i];
+    var geometry = feature.getGeometry();
+    if (!goog.isNull(geometry) && !goog.isNull(transform)) {
+      geometry.transform(transform);
+    }
+    this.addFeature(feature);
+  }
+  this.setState(ol.source.State.READY);
+};