Add support for pre-defined coordinates

Readme.md

@@ -21,11 +21,19 @@ To use it create a `<div>`, give it an ID and at least `200px` height and execut
 new StadtnaviAddressBox(divId, title, address, options);
 ```
 
+or, if the coordinates are known and no on-the-fly geocoding is required:
+
+```js
+new StadtnaviAddressBox(divId, title, address, options, lat, lon);
+```
+
 #### Arguments
 
 - `divId`: ID of the `<div>` element into which the interactive map is placed.
 - `title`: Name of the place for which the address box is for. This can be choosen freely and is used only for display purposes.
-- `address`: A full address with street name, house number, postal code and city. This is used for geolocating the place on the map so precise information is required.
+- `address`: A full address with street name, house number, postal code and city. This is used for geolocating the place on the map so precise information is required, in case lat/lon are unknown.
+- `lat`: Optional latitude value (-90 <=lat <= 90) for locating the place.
+- `lon`: Optional longitude value (-180 <=lat <= 180) for locating the place.
 
 #### Options
 

src/address-box.js

@@ -52,7 +52,7 @@ L.control.logo = function(opts) {
 
 class StadtnaviAddressBox {
 
-  constructor(divId, title, address, options) {
+  constructor(divId, title, address, options, lat, lon) {
 
     this.defaults = {
       ... {
@@ -82,19 +82,28 @@ class StadtnaviAddressBox {
     map.attributionControl.setPrefix(false);
     map.dragging.disable();
 
+    const lonFloat = parseFloat(lon);
+    const latFloat = parseFloat(lat);
+    if (lonFloat >= -180 && lonFloat <= 180 && latFloat >= -90 && latFloat <= 90 ) {
+      this.zoomTo([latFloat, lonFloat], map, title, address);
+    } else {
+      fetch(`${Stadtnavi.photonUrl}/api?q=${address}`)
+        .then(r => r.json())
+        .then(json => {
+
+          const latLng = json.features[0].geometry.coordinates;
+          latLng.reverse();
+          this.zoomTo(latLng, map, title, address);
+        });
+    }
+  }
 
-    fetch(`${Stadtnavi.photonUrl}/api?q=${address}`)
-      .then(r => r.json())
-      .then(json => {
-
-        const latLng = json.features[0].geometry.coordinates;
-        latLng.reverse();
-        map.setView(latLng)
+  zoomTo(latLng, map, title, address ) {
+    map.setView(latLng)
 
-        Stadtnavi.marker(latLng, mergedOptions).addTo(map);
-        L.control.address({ position: 'topleft', lat: latLng[0], lng: latLng[1], title, address,
-          stadtnaviLinkText: mergedOptions.stadtnaviLinkText, stadtnaviBaseUrl: mergedOptions.stadtnaviBaseUrl }).addTo(map);
-      });
+    Stadtnavi.marker(latLng, this.mergedOptions).addTo(map);
+    L.control.address({ position: 'topleft', lat: latLng[0], lng: latLng[1], title, address,
+      stadtnaviLinkText: this.mergedOptions.stadtnaviLinkText, stadtnaviBaseUrl: this.mergedOptions.stadtnaviBaseUrl }).addTo(map);
   }
 
   computeOptions(options) {

src/demo.html

@@ -77,21 +77,24 @@ <h3>Callback result</h3>
       </section>
 
       <section>
-        <h2 class="mt-5">Address box</h2>
+        <h2 class="mt-5">Address box with well-known coordinates</h2>
 
         <h4>JavaScript code</h4>
         <pre>
-new StadtnaviAddressBox('widget-2', "Volkshochschule Außenstelle Ehningen", "Gartenstraße 11, 71139 Ehningen", {});</pre>
+new StadtnaviAddressBox('widget-2', "Volkshochschule Außenstelle Ehningen", "Gartenstraße 11, 71139 Ehningen", {}, 48.659697, 8.943804);</pre>
 
         <div id='widget-2' class="stadtnavi-widget"></div>
 
         <script type="text/javascript">
-          new StadtnaviAddressBox('widget-2', "Volkshochschule Außenstelle Ehningen", "Gartenstraße 11, 71139 Ehningen", {});
+          new StadtnaviAddressBox('widget-2', "Volkshochschule Außenstelle Ehningen", "Gartenstraße 11, 71139 Ehningen", {}, 48.659697, 8.943804);
         </script>
 
       </section>
 
+
       <section>
+        <h2 class="mt-5">Address box with on-the-fly geocoding</h2>
+
         <h4>JavaScript code</h4>
         <pre>
 new StadtnaviAddressBox('widget-3', "Rathaus Bietigheim-Bissingen", "Marktplatz 8, 74321 Bietigheim-Bissingen", {});</pre>