Add ol.format.OSMXML and ol.source.OSMXML

2014-01-20 17:16:03 +01:00
parent 35349764d9
commit 6ab3f6e175
7 changed files with 2659 additions and 0 deletions
--- a/src/ol/format/osmxmlformat.js
+++ b/src/ol/format/osmxmlformat.js
@@ -0,0 +1,210 @@
+// FIXME add typedef for stack state objects
+goog.provide('ol.format.OSMXML');
+
+goog.require('goog.array');
+goog.require('goog.asserts');
+goog.require('goog.dom.NodeType');
+goog.require('goog.object');
+goog.require('ol.Feature');
+goog.require('ol.format.XMLFeature');
+goog.require('ol.geom.LineString');
+goog.require('ol.geom.Point');
+goog.require('ol.geom.Polygon');
+goog.require('ol.proj');
+goog.require('ol.xml');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.format.XMLFeature}
+ */
+ol.format.OSMXML = function() {
+  goog.base(this);
+};
+goog.inherits(ol.format.OSMXML, ol.format.XMLFeature);
+
+
+/**
+ * @const
+ * @type {Array.<string>}
+ * @private
+ */
+ol.format.OSMXML.EXTENSIONS_ = ['.osm'];
+
+
+/**
+ * @inheritDoc
+ */
+ol.format.OSMXML.prototype.getExtensions = function() {
+  return ol.format.OSMXML.EXTENSIONS_;
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ */
+ol.format.OSMXML.readNode_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(node.localName == 'node');
+  var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);
+  var id = node.getAttribute('id');
+  var coordinates = /** @type {Array.<number>} */ ([
+    parseFloat(node.getAttribute('lon')),
+    parseFloat(node.getAttribute('lat'))
+  ]);
+  goog.object.set(state.nodes, id, coordinates);
+
+  var values = ol.xml.pushParseAndPop({
+    tags: {}
+  }, ol.format.OSMXML.NODE_PARSERS_, node, objectStack);
+  if (!goog.object.isEmpty(values.tags)) {
+    var geometry = new ol.geom.Point(coordinates);
+    var feature = new ol.Feature(geometry);
+    feature.setId(id);
+    feature.setValues(values.tags);
+    state.features.push(feature);
+  }
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ */
+ol.format.OSMXML.readWay_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(node.localName == 'way');
+  var values = ol.xml.pushParseAndPop({
+    ndrefs: [],
+    tags: {}
+  }, ol.format.OSMXML.WAY_PARSERS_, node, objectStack);
+  var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);
+  var flatCoordinates = /** @type {Array.<number>} */ ([]);
+  for (var i = 0, ii = values.ndrefs.length; i < ii; i++) {
+    var point = goog.object.get(state.nodes, values.ndrefs[i]);
+    goog.array.extend(flatCoordinates, point);
+  }
+  if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {
+    // closed way
+    var geometry = new ol.geom.Polygon(null);
+    geometry.setFlatCoordinates(ol.geom.GeometryLayout.XY, flatCoordinates,
+        [flatCoordinates.length]);
+  } else {
+    var geometry = new ol.geom.LineString(null);
+    geometry.setFlatCoordinates(ol.geom.GeometryLayout.XY, flatCoordinates);
+  }
+  var feature = new ol.Feature(geometry);
+  feature.setValues(values.tags);
+  state.features.push(feature);
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ * @return {ol.Feature|undefined} Track.
+ */
+ol.format.OSMXML.readNd_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(node.localName == 'nd');
+  var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);
+  values.ndrefs.push(node.getAttribute('ref'));
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ * @return {ol.Feature|undefined} Track.
+ */
+ol.format.OSMXML.readTag_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(node.localName == 'tag');
+  var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);
+  goog.object.set(values.tags, node.getAttribute('k'), node.getAttribute('v'));
+};
+
+
+/**
+ * @const
+ * @private
+ * @type {Array.<string>}
+ */
+ol.format.OSMXML.NAMESPACE_URIS_ = [
+  null
+];
+
+
+/**
+ * @const
+ * @type {Object.<string, Object.<string, ol.xml.Parser>>}
+ * @private
+ */
+ol.format.OSMXML.WAY_PARSERS_ = ol.xml.makeParsersNS(
+    ol.format.OSMXML.NAMESPACE_URIS_, {
+      'nd': ol.format.OSMXML.readNd_,
+      'tag': ol.format.OSMXML.readTag_
+    });
+
+
+/**
+ * @const
+ * @type {Object.<string, Object.<string, ol.xml.Parser>>}
+ * @private
+ */
+ol.format.OSMXML.PARSERS_ = ol.xml.makeParsersNS(
+    ol.format.OSMXML.NAMESPACE_URIS_, {
+      'node': ol.format.OSMXML.readNode_,
+      'way': ol.format.OSMXML.readWay_
+    });
+
+
+/**
+ * @const
+ * @type {Object.<string, Object.<string, ol.xml.Parser>>}
+ * @private
+ */
+ol.format.OSMXML.NODE_PARSERS_ = ol.xml.makeParsersNS(
+    ol.format.OSMXML.NAMESPACE_URIS_, {
+      'tag': ol.format.OSMXML.readTag_
+    });
+
+
+/**
+ * @inheritDoc
+ */
+ol.format.OSMXML.prototype.readFeaturesFromNode = function(node) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  if (node.localName == 'osm') {
+    var state = ol.xml.pushParseAndPop({
+      nodes: {},
+      features: []
+    }, ol.format.OSMXML.PARSERS_, node, []);
+    if (goog.isDef(state.features)) {
+      return state.features;
+    }
+  }
+  return [];
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.format.OSMXML.prototype.readProjectionFromDocument = function(doc) {
+  return ol.proj.get('EPSG:4326');
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.format.OSMXML.prototype.readProjectionFromNode = function(node) {
+  return ol.proj.get('EPSG:4326');
+};