add quadkey to url templates (#2805)

mapbox · Jul 1, 2016 · 7f37ff5 · 7f37ff5
1 parent 6a146a9
commit 7f37ff5
Show file tree

Hide file tree

Showing 2 changed files with 16 additions and 0 deletions.
diff --git a/js/source/tile_coord.js b/js/source/tile_coord.js
@@ -51,15 +51,26 @@ TileCoord.fromID = function(id) {
     return new TileCoord(z, x, y, w);
 };
 
+function getQuadkey(z, x, y) {
+    var quadkey = '', mask;
+    for (var i = z; i > 0; i--) {
+        mask = 1 << (i - 1);
+        quadkey += ((x & mask ? 1 : 0) + (y & mask ? 2 : 0));
+    }
+    return quadkey;
+}
+
 // given a list of urls, choose a url template and return a tile URL
 TileCoord.prototype.url = function(urls, sourceMaxZoom, scheme) {
     var bbox = WhooTS.getTileBBox(this.x, this.y, this.z);
+    var quadkey = getQuadkey(this.z, this.x, this.y);
 
     return urls[(this.x + this.y) % urls.length]
         .replace('{prefix}', (this.x % 16).toString(16) + (this.y % 16).toString(16))
         .replace('{z}', Math.min(this.z, sourceMaxZoom || this.z))
         .replace('{x}', this.x)
         .replace('{y}', scheme === 'tms' ? (Math.pow(2, this.z) - this.y - 1) : this.y)
+        .replace('{quadkey}', quadkey)
         .replace('{bbox-epsg-3857}', bbox);
 };
 

diff --git a/test/js/source/tile_coord.test.js b/test/js/source/tile_coord.test.js
@@ -48,6 +48,11 @@ test('TileCoord', function(t) {
             t.end();
         });
 
+        t.test('replaces {quadkey}', function(t) {
+            t.equal(new TileCoord(17, 22914, 52870).url(['a{quadkey}']), 'a02301322130000230');
+            t.end();
+        });
+
         t.test('replaces {bbox-epsg-3857}', function(t) {
             t.equal(new TileCoord(1, 0, 0).url(['bbox={bbox-epsg-3857}']), 'bbox=-20037508.342789244,0,0,20037508.342789244');
             t.end();