adding leaflet-hugo maps

This will hopefully allow me to create shortcode maps with osm and
leaflet rather than google.

static/js/leaflet.hugo.js

@@ -0,0 +1,108 @@
+let leafletMapsObj = {};
+let leafletMarkersObj = {};
+
+function drawTrack(trackOpts, elevationOpts, markerOpts) {
+    var opts = {
+        elevationControl: {
+            options: {
+                position: elevationOpts.graphPosition,
+                theme: elevationOpts.graphTheme,
+                width: elevationOpts.graphWidth,
+                height: elevationOpts.graphHeight,
+                margins: {
+                    top: 20,
+                    right: 20,
+                    bottom: 35,
+                    left: 50
+                },
+                followMarker: elevationOpts.graphFollowMarker,
+                collapsed: elevationOpts.graphCollapsed,
+                detached: elevationOpts.graphDetached,
+                legend: false,
+                summary: false,
+                downloadLink: '',
+                gpxOptions: {
+                    polyline_options: {
+                        className: 'track-' + trackOpts.trackId + '-',
+                        color: trackOpts.lineColor,
+                        opacity: trackOpts.lineOpacity,
+                        weight: trackOpts.lineWeight,
+                    },
+                    marker_options: {
+                        startIcon: new L.ExtraMarkers.icon({
+                            icon: markerOpts.iconStart,
+                            markerColor: markerOpts.iconStartColor,
+                            shape: markerOpts.iconStartShape,
+                            prefix: 'fa',
+                            extraClasses: markerOpts.iconStartClasses
+                        }),
+                        endIcon: new L.ExtraMarkers.icon({
+                            icon: markerOpts.iconEnd,
+                            markerColor: markerOpts.iconEndColor,
+                            shape: markerOpts.iconEndShape,
+                            prefix: 'fa',
+                            extraClasses: markerOpts.iconEndClasses
+                        }),
+                        wptIcons: {
+                            '': new L.ExtraMarkers.icon({
+                                icon: markerOpts.icon,
+                                markerColor: markerOpts.iconColor,
+                                shape: markerOpts.iconShape,
+                                prefix: 'fa',
+                                extraClasses:  markerOpts.iconClasses,
+                            })
+                        }
+                    }
+                },
+
+            },
+        },
+    };
+
+    L.control.elevation(opts.elevationControl.options).addTo(leafletMapsObj[trackOpts.mapId]).load(trackOpts.trackPath);
+
+    /*map.on('eledata_loaded', function(e) {
+        track = e.track_info;
+    });*/
+}
+
+window.downloadFile = function (sUrl) {
+
+    //iOS devices do not support downloading. We have to inform user about this.
+    if (/(iP)/g.test(navigator.userAgent)) {
+        alert('Your device does not support files downloading. Please try again in desktop browser.');
+        return false;
+    }
+
+    //If in Chrome or Safari - download via virtual link click
+    if (window.downloadFile.isChrome || window.downloadFile.isSafari) {
+        //Creating new link node.
+        var link = document.createElement('a');
+        link.href = sUrl;
+
+        if (link.download !== undefined) {
+            //Set HTML5 download attribute. This will prevent file from opening if supported.
+            var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
+            link.download = fileName;
+        }
+
+        //Dispatching click event.
+        if (document.createEvent) {
+            var e = document.createEvent('MouseEvents');
+            e.initEvent('click', true, true);
+            link.dispatchEvent(e);
+            return true;
+        }
+    }
+
+    // Force file download (whether supported by server).
+    if (sUrl.indexOf('?') === -1) {
+        sUrl += '?download';
+    }
+
+    window.open(sUrl, '_self');
+    return true;
+};
+
+window.downloadFile.isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
+window.downloadFile.isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1;