Add interface GeocodingContext

See #339.

src/control.ts

@@ -1,6 +1,6 @@
 import * as L from 'leaflet';
 import { Nominatim } from './geocoders/index';
-import { IGeocoder, GeocodingResult } from './geocoders/api';
+import { IGeocoder, GeocodingResult, GeocodingContext } from './geocoders/api';
 
 export interface GeocoderControlOptions extends L.ControlOptions {
   /**
@@ -316,7 +316,7 @@ export class GeocoderControl extends EventedControl {
     const event: StartGeocodeEvent = { input: value };
     this.fire(suggest ? 'startsuggest' : 'startgeocode', event);
 
-    const context = { map: this._map };
+    const context: GeocodingContext = { map: this._map };
     const results = suggest
       ? await this.options.geocoder!.suggest!(value, context)
       : await this.options.geocoder!.geocode(value, context);

src/geocoders/api.ts

@@ -1,5 +1,15 @@
 import * as L from 'leaflet';
 
+/**
+ * Context for geocoding operations
+ */
+export interface GeocodingContext {
+  /**
+   * The map instance
+   */
+  map: L.Map;
+}
+
 /**
  * An object that represents a result from a geocoding query
  */
@@ -38,12 +48,12 @@ export interface IGeocoder {
    * Performs a geocoding query and returns the results as promise
    * @param query the query
    */
-  geocode(query: string): Promise<GeocodingResult[]>;
+  geocode(query: string, context?: GeocodingContext): Promise<GeocodingResult[]>;
   /**
    * Performs a geocoding query suggestion (this happens while typing) and returns the results as promise
    * @param query the query
    */
-  suggest?(query: string): Promise<GeocodingResult[]>;
+  suggest?(query: string, context?: GeocodingContext): Promise<GeocodingResult[]>;
   /**
    * Performs a reverse geocoding query and returns the results as promise
    * @param location the coordinate to reverse geocode