openlayers
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Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
// FIXME add typedef for stack state objects
goog.provide('ol.format.OSMXML');
goog.require('ol');
goog.require('ol.array');
goog.require('ol.Feature');
goog.require('ol.format.Feature');
goog.require('ol.format.XMLFeature');
goog.require('ol.geom.GeometryLayout');
goog.require('ol.geom.LineString');
goog.require('ol.geom.Point');
goog.require('ol.geom.Polygon');
goog.require('ol.obj');
goog.require('ol.proj');
goog.require('ol.xml');
/**
* @classdesc
* Feature format for reading data in the
* [OSMXML format](http://wiki.openstreetmap.org/wiki/OSM_XML).
*
* @constructor
* @extends {ol.format.XMLFeature}
* @api stable
*/
ol.format.OSMXML = function() {
ol.format.XMLFeature.call(this);
/**
* @inheritDoc
*/
this.defaultDataProjection = ol.proj.get('EPSG:4326');
};
ol.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) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'node', 'localName should be node');
var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);
var id = node.getAttribute('id');
/** @type {ol.Coordinate} */
var coordinates = [
parseFloat(node.getAttribute('lon')),
parseFloat(node.getAttribute('lat'))
];
state.nodes[id] = coordinates;
var values = ol.xml.pushParseAndPop({
tags: {}
}, ol.format.OSMXML.NODE_PARSERS_, node, objectStack);
if (!ol.obj.isEmpty(values.tags)) {
var geometry = new ol.geom.Point(coordinates);
ol.format.Feature.transformWithOptions(geometry, false, options);
var feature = new ol.Feature(geometry);
feature.setId(id);
feature.setProperties(values.tags);
state.features.push(feature);
}
};
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @private
*/
ol.format.OSMXML.readWay_ = function(node, objectStack) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'way', 'localName should be way');
var options = /** @type {olx.format.ReadOptions} */ (objectStack[0]);
var id = node.getAttribute('id');
var values = ol.xml.pushParseAndPop({
ndrefs: [],
tags: {}
}, ol.format.OSMXML.WAY_PARSERS_, node, objectStack);
var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);
/** @type {Array.<number>} */
var flatCoordinates = [];
for (var i = 0, ii = values.ndrefs.length; i < ii; i++) {
var point = state.nodes[values.ndrefs[i]];
ol.array.extend(flatCoordinates, point);
}
var geometry;
if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {
// closed way
geometry = new ol.geom.Polygon(null);
geometry.setFlatCoordinates(ol.geom.GeometryLayout.XY, flatCoordinates,
[flatCoordinates.length]);
} else {
geometry = new ol.geom.LineString(null);
geometry.setFlatCoordinates(ol.geom.GeometryLayout.XY, flatCoordinates);
}
ol.format.Feature.transformWithOptions(geometry, false, options);
var feature = new ol.Feature(geometry);
feature.setId(id);
feature.setProperties(values.tags);
state.features.push(feature);
};
/**
* @param {Node} node Node.
* @param {Array.<*>} objectStack Object stack.
* @private
*/
ol.format.OSMXML.readNd_ = function(node, objectStack) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'nd', 'localName should be 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
*/
ol.format.OSMXML.readTag_ = function(node, objectStack) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
ol.DEBUG && console.assert(node.localName == 'tag', 'localName should be tag');
var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);
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.XmlParser>>}
* @private
*/
ol.format.OSMXML.WAY_PARSERS_ = ol.xml.makeStructureNS(
ol.format.OSMXML.NAMESPACE_URIS_, {
'nd': ol.format.OSMXML.readNd_,
'tag': ol.format.OSMXML.readTag_
});
/**
* @const
* @type {Object.<string, Object.<string, ol.XmlParser>>}
* @private
*/
ol.format.OSMXML.PARSERS_ = ol.xml.makeStructureNS(
ol.format.OSMXML.NAMESPACE_URIS_, {
'node': ol.format.OSMXML.readNode_,
'way': ol.format.OSMXML.readWay_
});
/**
* @const
* @type {Object.<string, Object.<string, ol.XmlParser>>}
* @private
*/
ol.format.OSMXML.NODE_PARSERS_ = ol.xml.makeStructureNS(
ol.format.OSMXML.NAMESPACE_URIS_, {
'tag': ol.format.OSMXML.readTag_
});
/**
* Read all features from an OSM source.
*
* @function
* @param {Document|Node|Object|string} source Source.
* @param {olx.format.ReadOptions=} opt_options Read options.
* @return {Array.<ol.Feature>} Features.
* @api stable
*/
ol.format.OSMXML.prototype.readFeatures;
/**
* @inheritDoc
*/
ol.format.OSMXML.prototype.readFeaturesFromNode = function(node, opt_options) {
ol.DEBUG && console.assert(node.nodeType == Node.ELEMENT_NODE,
'node.nodeType should be ELEMENT');
var options = this.getReadOptions(node, opt_options);
if (node.localName == 'osm') {
var state = ol.xml.pushParseAndPop({
nodes: {},
features: []
}, ol.format.OSMXML.PARSERS_, node, [options]);
if (state.features) {
return state.features;
}
}
return [];
};
/**
* Read the projection from an OSM source.
*
* @function
* @param {Document|Node|Object|string} source Source.
* @return {ol.proj.Projection} Projection.
* @api stable
*/
ol.format.OSMXML.prototype.readProjection;