searxng/searx/static/themes/oscar/src/js/leaflet_map.js

/**
 * @license
 * (C) Copyright Contributors to the SearXNG project.
 * (C) Copyright Contributors to the searx project (2014 - 2021).
 * (C) 2014 by Thomas Pointhuber, <thomas.pointhuber@gmx.at>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

$(document).ready(function(){
    $(".searxng_init_map").on( "click", function( event ) {
        var leaflet_target = $(this).data('leaflet-target');
        var map_lon = $(this).data('map-lon');
        var map_lat = $(this).data('map-lat');
        var map_zoom = $(this).data('map-zoom');
        var map_boundingbox = $(this).data('map-boundingbox');
        var map_geojson = $(this).data('map-geojson');

        if(map_boundingbox) {
            southWest = L.latLng(map_boundingbox[0], map_boundingbox[2]);
            northEast = L.latLng(map_boundingbox[1], map_boundingbox[3]);
            map_bounds = L.latLngBounds(southWest, northEast);
        }

        // change default imagePath
        L.Icon.Default.imagePath =  "./static/themes/oscar/css/images/";

        // init map
        var map = L.map(leaflet_target);

        // create the tile layer with correct attribution
        var osmMapnikUrl='https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
        var osmMapnikAttrib='Map data © <a href="https://openstreetmap.org">OpenStreetMap</a> contributors';
        var osmMapnik = new L.TileLayer(osmMapnikUrl, {minZoom: 1, maxZoom: 19, attribution: osmMapnikAttrib});

        var osmWikimediaUrl='https://maps.wikimedia.org/osm-intl/{z}/{x}/{y}.png';
        var osmWikimediaAttrib = 'Wikimedia maps beta | Maps data © <a href="https://openstreetmap.org">OpenStreetMap</a> contributors';
        var osmWikimedia = new L.TileLayer(osmWikimediaUrl, {minZoom: 1, maxZoom: 19, attribution: osmWikimediaAttrib});

        // init map view
        setTimeout(function() {
            if(map_bounds) {
                map.fitBounds(map_bounds, {
                    maxZoom:17
                });
            } else if (map_lon && map_lat) {
                if(map_zoom)
                    map.setView(new L.LatLng(map_lat, map_lon),map_zoom);
                else
                    map.setView(new L.LatLng(map_lat, map_lon),8);
            }    
        }, 0);

        map.addLayer(osmMapnik);

        var baseLayers = {
            "OSM Mapnik": osmMapnik/*,
            "OSM Wikimedia": osmWikimedia*/
        };

        L.control.layers(baseLayers).addTo(map);

        if(map_geojson)
            L.geoJson(map_geojson).addTo(map);
        /*else if(map_bounds)
            L.rectangle(map_bounds, {color: "#ff7800", weight: 3, fill:false}).addTo(map);*/

        // this event occour only once per element
        $( this ).off( event );
    });
});