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(function() {
'use strict';
let GeoJson = {};
// https://github.com/Leaflet/Leaflet/blob/f8e09f993292579a1af88261c9b461730f22e4e6/src/layer/GeoJSON.js#L49-L57
// https://github.com/mapbox/simplestyle-spec/tree/master/1.1.0
// https://leafletjs.com/reference-1.6.0.html#path
GeoJson.simpleStyleToLeafletPathOptions = function(featureProperties) {
let simpleStyleToLeaflet = {
'stroke': 'color',
'stroke-width': 'weight',
'stroke-opacity': 'opacity',
'fill': 'fillColor',
'fill-opacity': 'fillOpacity',
};
let pathOptions = {};
for (let [key, value] of Object.entries(simpleStyleToLeaflet)) {
if (featureProperties[key]) {
pathOptions[value] = featureProperties[key];
}
}
return pathOptions;
};
function escapeHTML(unsafeText) {
let div = document.createElement('div');
div.innerText = unsafeText;
return div.innerHTML;
}
GeoJson.popupContentFromProperties = function(properties) {
if (!properties.title && !properties.description) {
return '';
}
if (!properties.description) {
return escapeHTML(properties.title);
}
if (!properties.title) {
return escapeHTML(properties.description);
}
// CHANGE: allows html format in description of GeoJSON element
return '<strong>' + escapeHTML(properties.title) + '</strong><br><br>'
+ properties.description;
};
GeoJson.newGeoJsonLayer = function(L, json) {
return L.geoJSON(
json,
{
style: function (feature) {
return GeoJson.simpleStyleToLeafletPathOptions(feature.properties);
},
onEachFeature: function (feature, layer) {
let popupContent = GeoJson.popupContentFromProperties(feature.properties);
if (popupContent !== '') {
layer.bindPopup(popupContent);
}
}
}
);
};
if (!window.maps) {window.maps = {};}
if (!window.maps.leaflet) {window.maps.leaflet = {};}
window.maps.leaflet.GeoJson = GeoJson;
})();
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