Add ol.Geolocation

src/ol/geolocation.js

@@ -0,0 +1,100 @@
+// FIXME: handle errors ?
+
+goog.provide('ol.Geolocation');
+goog.provide('ol.GeolocationProperty');
+
+goog.require('ol.Coordinate');
+goog.require('ol.Object');
+goog.require('ol.Projection');
+
+
+/**
+ * @enum {string}
+ */
+ol.GeolocationProperty = {
+  ACCURACY: 'accuracy',
+  POSITION: 'position'
+};
+
+
+
+/**
+ * @constructor
+ * @extends {ol.Object}
+ * @param {ol.Projection} projection Projection.
+ * @param {GeolocationPositionOptions=} opt_positionOptions PositionOptions.
+ */
+ol.Geolocation = function(projection, opt_positionOptions) {
+
+  goog.base(this);
+
+  this.transformCoords_ = ol.Projection.getTransform(
+      ol.Projection.getFromCode('EPSG:4326'), projection);
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.watchId_ = navigator.geolocation.watchPosition(
+      goog.bind(this.positionChange_, this),
+      goog.bind(this.positionError_, this),
+      opt_positionOptions);
+};
+goog.inherits(ol.Geolocation, ol.Object);
+
+
+/**
+ * @inheritDoc
+ */
+ol.Geolocation.prototype.disposeInternal = function() {
+  navigator.geolocation.clearWatch(this.watchId_);
+  goog.base(this, 'disposeInternal');
+};
+
+
+/**
+ * @private
+ * @param {GeolocationPosition} position position event.
+ */
+ol.Geolocation.prototype.positionChange_ = function(position) {
+  var coords = position.coords;
+  var coord = new ol.Coordinate(coords.longitude, coords.latitude);
+  this.set(ol.GeolocationProperty.POSITION, this.transformCoords_(coord));
+  this.set(ol.GeolocationProperty.ACCURACY, coords.accuracy);
+};
+
+
+/**
+ * @private
+ * @param {GeolocationPositionError} error error object.
+ */
+ol.Geolocation.prototype.positionError_ = function(error) {
+};
+
+
+/**
+ * The position of the device.
+ * @return {ol.Coordinate} position.
+ */
+ol.Geolocation.prototype.getPosition = function() {
+  return /** @type {ol.Coordinate} */ (
+      this.get(ol.GeolocationProperty.POSITION));
+};
+goog.exportProperty(
+    ol.Geolocation.prototype,
+    'getPosition',
+    ol.Geolocation.prototype.getPosition);
+
+
+/**
+ * The accuracy of the position in meters.
+ * @return {number} accuracy.
+ */
+ol.Geolocation.prototype.getAccuracy = function() {
+  return /** @type {number} */ (
+      this.get(ol.GeolocationProperty.ACCURACY));
+};
+goog.exportProperty(
+    ol.Geolocation.prototype,
+    'getAccuracy',
+    ol.Geolocation.prototype.getAccuracy);