leaflet-routing-machine/src/error-control.js

Routing for Leaflet

(function() {
	'use strict';

	var L = require('leaflet');

	module.exports = L.Control.extend({
		options: {
			header: 'Routing error',
			formatMessage: function(error) {
				if (error.status < 0) {
					return 'Calculating the route caused an error. Technical description follows: <code><pre>' +
						error.message + '</pre></code';
				} else {
					return 'The route could not be calculated. ' +
						error.message;
				}
			}
		},

		initialize: function(routingControl, options) {
			L.Control.prototype.initialize.call(this, options);
			routingControl
				.on('routingerror', L.bind(function(e) {
					if (this._element) {
						this._element.children[1].innerHTML = this.options.formatMessage(e.error);
						this._element.style.visibility = 'visible';
					}
				}, this))
				.on('routingstart', L.bind(function() {
					if (this._element) {
						this._element.style.visibility = 'hidden';
					}
				}, this));
		},

		onAdd: function() {
			var header,
				message;

			this._element = L.DomUtil.create('div', 'leaflet-bar leaflet-routing-error');
			this._element.style.visibility = 'hidden';

			header = L.DomUtil.create('h3', null, this._element);
			message = L.DomUtil.create('span', null, this._element);

			header.innerHTML = this.options.header;

			return this._element;
		},

		onRemove: function() {
			delete this._element;
		}
	});
})();