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/*
* Provides L.Map with convenient shortcuts for W3C geolocation.
*/
L.Map.include({
locate: function(/*Object*/ options) {
// W3C Geolocation API Spec position options, http://dev.w3.org/geo/api/spec-source.html#position-options
var opts = {timeout: 10000};
L.Util.extend(opts, options);
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(
L.Util.bind(this._handleGeolocationResponse, this),
L.Util.bind(this._handleGeolocationError, this),
opts);
} else {
this.fire('locationerror', {
code: 0,
message: "Geolocation not supported."
});
}
return this;
},
locateAndSetView: function(maxZoom, options) {
this._setViewOnLocate = true;
this._maxLocateZoom = maxZoom || Infinity;
return this.locate(options);
},
_handleGeolocationError: function(error) {
var c = error.code,
message = (c == 1 ? "permission denied" :
(c == 2 ? "position unavailable" : "timeout"));
if (this._setViewOnLocate) {
this.fitWorld();
this._setViewOnLocate = false;
}
this.fire('locationerror', {
code: c,
message: "Geolocation error: " + message + "."
});
},
_handleGeolocationResponse: function(pos) {
var latAccuracy = 180 * pos.coords.accuracy / 4e7,
lngAccuracy = latAccuracy * 2,
lat = pos.coords.latitude,
lng = pos.coords.longitude;
var sw = new L.LatLng(lat - latAccuracy, lng - lngAccuracy),
ne = new L.LatLng(lat + latAccuracy, lng + lngAccuracy),
bounds = new L.LatLngBounds(sw, ne);
if (this._setViewOnLocate) {
var zoom = Math.min(this.getBoundsZoom(bounds), this._maxLocateZoom);
this.setView(bounds.getCenter(), zoom);
this._setViewOnLocate = false;
}
this.fire('locationfound', {
latlng: new L.LatLng(lat, lng),
bounds: bounds,
accuracy: pos.coords.accuracy
});
}
});
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