Allow raw latlng array in latLngToCoords/latLngsToCoords (#7436)

* Add Array traitment into latLngToCoords/latLngsToCoords

add array management into function latLngToCoords and coordsToLatLngs

Add array management into GeoJSON.latLngToCoords andGeoJSON.latLngToCoords

* Add tests

* minify code

* remove redundant code

* revert change

Co-authored-by: Dorian Benedetti <dorian.benedetti@etu.u-bordeaux.fr>
Co-authored-by: Florian Bischof <design.falke@gmail.com>

Author: 3 people

spec/suites/layer/GeoJSONSpec.js

@@ -752,6 +752,11 @@ describe("L.GeoJSON functions", function () {
 	});
 
 	describe("#latLngToCoords", function () {
+		it("accepts latlng array", function () {
+			var coords = L.GeoJSON.latLngToCoords([2, 1, 3]);
+			expect(coords).to.eql([1, 2, 3]);
+		});
+
 		it("returns an array of coordinates and altitude", function () {
 			var coords = L.GeoJSON.latLngToCoords(L.latLng(2, 1));
 			var coordsWithAlt = L.GeoJSON.latLngToCoords(L.latLng(2, 1, 3));
@@ -772,6 +777,11 @@ describe("L.GeoJSON functions", function () {
 	});
 
 	describe("#latLngsToCoords", function () {
+		it("accepts multidimensional latlng array", function () {
+			var coords = L.GeoJSON.latLngsToCoords([[2, 1, 3], [5, 4, 6]]);
+			expect(coords).to.eql([[1, 2, 3], [4, 5, 6]]);
+		});
+
 		it("returns a multidimensional array of coordinates", function () {
 			var coords = L.GeoJSON.latLngsToCoords([L.latLng(2, 1), L.latLng(4, 3)]);
 			var coordWithAlt = L.GeoJSON.latLngsToCoords([L.latLng(2, 1, 3), L.latLng(5, 4, 6)]);

src/layer/GeoJSON.js

@@ -8,6 +8,7 @@ import {Polyline} from './vector/Polyline';
 import {Polygon} from './vector/Polygon';
 import {LatLng} from '../geo/LatLng';
 import * as LineUtil from '../geometry/LineUtil';
+import {toLatLng} from '../geo/LatLng';
 
 
 /*
@@ -257,6 +258,7 @@ export function coordsToLatLngs(coords, levelsDeep, _coordsToLatLng) {
 // Reverse of [`coordsToLatLng`](#geojson-coordstolatlng)
 // Coordinates values are rounded with [`formatNum`](#util-formatnum) function.
 export function latLngToCoords(latlng, precision) {
+	latlng = toLatLng(latlng);
 	return latlng.alt !== undefined ?
 		[Util.formatNum(latlng.lng, precision), Util.formatNum(latlng.lat, precision), Util.formatNum(latlng.alt, precision)] :
 		[Util.formatNum(latlng.lng, precision), Util.formatNum(latlng.lat, precision)];