From 65b8e0f91576e521606d906ecdfa9dffd2159dcb Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Thu, 27 Sep 2012 12:41:45 +0200
Subject: [PATCH] Use object literals and use generic tile layer

---
 build/ol.json                              |  11 +-
 demos/api/full-screen.html                 |   4 +-
 demos/full-screen/full-screen.js           |   6 +-
 demos/side-by-side/side-by-side.js         |   7 +-
 demos/two-layers/two-layers.js             |  21 ++--
 exports/ol/layer/bingmaps.js               |   3 -
 exports/ol/layer/mapquest.js               |   5 -
 exports/ol/layer/openstreetmap.js          |   3 -
 exports/ol/layer/stamen.js                 |   3 -
 exports/ol/layer/tilejson.js               |   3 -
 exports/ol/layer/tilelayer.js              |   3 +
 exports/ol/source/bingmaps.js              |   3 +
 exports/ol/source/mapquest.js              |   5 +
 exports/ol/source/openstreetmap.js         |   3 +
 exports/ol/source/stamen.js                |   3 +
 exports/ol/source/tilejson.js              |   3 +
 src/ol/control/attribution.js              |   6 +-
 src/ol/layer/layer.js                      |  66 ++++++++---
 src/ol/layer/openstreetmap.js              |  40 -------
 src/ol/layer/tilelayer.js                  |  14 +--
 src/ol/layer/xyz.js                        | 118 -------------------
 src/ol/source.js                           |  96 ----------------
 src/ol/{layer => source}/bingmaps.js       |  77 ++++---------
 src/ol/{layer => source}/mapquest.js       |  39 ++++---
 src/ol/source/openstreetmap.js             |  25 ++++
 src/ol/source/source.js                    | 119 +++++++++++++++++++
 src/ol/{layer => source}/stamen.js         |  75 ++++++------
 src/ol/{layer => source}/tilejson.js       |  72 ++++--------
 src/ol/source/tilesource.js                | 118 +++++++++++++++++++
 src/ol/source/xyz.js                       | 109 ++++++++++++++++++
 src/ol/tilecoveragearea.js                 |   6 +-
 src/ol/{ => tilegrid}/tilegrid.js          |  81 +++++++------
 src/ol/tilegrid/xyz.js                     |  64 +++++++++++
 src/ol/tilesource.js                       | 101 -----------------
 test/ol.html                               |   3 +-
 test/spec/ol/{layer => source}/xyz.test.js |   8 +-
 test/spec/ol/tilegrid.test.js              | 126 ++++++++++++++++-----
 37 files changed, 803 insertions(+), 646 deletions(-)
 delete mode 100644 exports/ol/layer/bingmaps.js
 delete mode 100644 exports/ol/layer/mapquest.js
 delete mode 100644 exports/ol/layer/openstreetmap.js
 delete mode 100644 exports/ol/layer/stamen.js
 delete mode 100644 exports/ol/layer/tilejson.js
 create mode 100644 exports/ol/layer/tilelayer.js
 create mode 100644 exports/ol/source/bingmaps.js
 create mode 100644 exports/ol/source/mapquest.js
 create mode 100644 exports/ol/source/openstreetmap.js
 create mode 100644 exports/ol/source/stamen.js
 create mode 100644 exports/ol/source/tilejson.js
 delete mode 100644 src/ol/layer/openstreetmap.js
 delete mode 100644 src/ol/layer/xyz.js
 delete mode 100644 src/ol/source.js
 rename src/ol/{layer => source}/bingmaps.js (67%)
 rename src/ol/{layer => source}/mapquest.js (51%)
 create mode 100644 src/ol/source/openstreetmap.js
 create mode 100644 src/ol/source/source.js
 rename src/ol/{layer => source}/stamen.js (53%)
 rename src/ol/{layer => source}/tilejson.js (66%)
 create mode 100644 src/ol/source/tilesource.js
 create mode 100644 src/ol/source/xyz.js
 rename src/ol/{ => tilegrid}/tilegrid.js (74%)
 create mode 100644 src/ol/tilegrid/xyz.js
 delete mode 100644 src/ol/tilesource.js
 rename test/spec/ol/{layer => source}/xyz.test.js (96%)

diff --git a/build/ol.json b/build/ol.json
index 2e31ab730c..8a0951c37d 100644
--- a/build/ol.json
+++ b/build/ol.json
@@ -16,14 +16,13 @@
     "exports/ol/collection.js",
     "exports/ol/coordinate.js",
     "exports/ol/extent.js",
-    "exports/ol/layer/bingmaps.js",
-    "exports/ol/layer/mapquest.js",
-    "exports/ol/layer/openstreetmap.js",
-    "exports/ol/layer/tilejson.js",
-    "exports/ol/layer/stamen.js",
+    "exports/ol/layer/tilelayer.js",
     "exports/ol/map.js",
     "exports/ol/object.js",
-    "exports/ol/projection.js"
+    "exports/ol/projection.js",
+    "exports/ol/source/mapquest.js",
+    "exports/ol/source/openstreetmap.js",
+    "exports/ol/source/stamen.js"
   ],
 
   "output-wrapper": "(function(){%output%})();"
diff --git a/demos/api/full-screen.html b/demos/api/full-screen.html
index 2bd486d257..f79dad20c2 100644
--- a/demos/api/full-screen.html
+++ b/demos/api/full-screen.html
@@ -18,7 +18,9 @@
         <script src="../../build/ol.js" type="text/javascript"></script>
         <script type="text/javascript">
 
-            var layer = new ol.layer.MapQuestOpenAerial();
+            var layer = new ol.layer.TileLayer({
+              source: new ol.source.MapQuestOpenAerial()
+            });
             var map = new ol.Map(document.getElementById('map'), {
               center: new ol.Coordinate(0, 0),
               layers: new ol.Collection([layer]),
diff --git a/demos/full-screen/full-screen.js b/demos/full-screen/full-screen.js
index 82bed5bbbf..a26e1d4935 100644
--- a/demos/full-screen/full-screen.js
+++ b/demos/full-screen/full-screen.js
@@ -6,7 +6,7 @@ goog.require('ol.Coordinate');
 goog.require('ol.Map');
 goog.require('ol.MapOptions'); // FIXME this should not be required
 goog.require('ol.control.Zoom');
-goog.require('ol.layer.MapQuestOpenAerial');
+goog.require('ol.source.MapQuestOpenAerial');
 
 
 if (goog.DEBUG) {
@@ -15,7 +15,9 @@ if (goog.DEBUG) {
 }
 
 
-var layer = new ol.layer.MapQuestOpenAerial();
+var layer = new ol.layer.TileLayer({
+  source: new ol.source.MapQuestOpenAerial()
+});
 var map = new ol.Map(document.getElementById('map'), {
   center: new ol.Coordinate(0, 0),
   layers: new ol.Collection([layer]),
diff --git a/demos/side-by-side/side-by-side.js b/demos/side-by-side/side-by-side.js
index 6c711c0c2d..9b953f41d2 100644
--- a/demos/side-by-side/side-by-side.js
+++ b/demos/side-by-side/side-by-side.js
@@ -7,7 +7,8 @@ goog.require('ol.RendererHint');
 goog.require('ol.control.Attribution');
 goog.require('ol.control.MousePosition');
 goog.require('ol.interaction.Keyboard');
-goog.require('ol.layer.MapQuestOpenAerial');
+goog.require('ol.layer.TileLayer');
+goog.require('ol.source.MapQuestOpenAerial');
 
 
 if (goog.DEBUG) {
@@ -16,7 +17,9 @@ if (goog.DEBUG) {
 }
 
 
-var layer = new ol.layer.MapQuestOpenAerial();
+var layer = new ol.layer.TileLayer({
+  source: new ol.source.MapQuestOpenAerial()
+});
 
 var domMap = new ol.Map(document.getElementById('domMap'), {
   center: new ol.Coordinate(0, 0),
diff --git a/demos/two-layers/two-layers.js b/demos/two-layers/two-layers.js
index 179375d3c2..8284e5dba1 100644
--- a/demos/two-layers/two-layers.js
+++ b/demos/two-layers/two-layers.js
@@ -4,16 +4,23 @@ goog.require('ol.Map');
 goog.require('ol.Projection');
 goog.require('ol.RendererHint');
 goog.require('ol.control.Attribution');
-goog.require('ol.layer.BingMaps');
-goog.require('ol.layer.TileJSON');
+goog.require('ol.layer.TileLayer');
+goog.require('ol.source.BingMaps');
+goog.require('ol.source.TileJSON');
 
 
 var layers = new ol.Collection([
-  new ol.layer.BingMaps(
-      ol.BingMapsStyle.AERIAL,
-      'AheP841R-MsLErKQChaTba_xDoOCl40-EeTubD9uNhNAyQTePwFY9iVD1_pyqqlE'),
-  new ol.layer.TileJSON(
-      'http://api.tiles.mapbox.com/v3/mapbox.va-quake-aug.jsonp')
+  new ol.layer.TileLayer({
+    source: new ol.source.BingMaps({
+      key: 'AheP841R-MsLErKQChaTba_xDoOCl40-EeTubD9uNhNAyQTePwFY9iVD1_pyqqlE',
+      style: ol.BingMapsStyle.AERIAL
+    })
+  }),
+  new ol.layer.TileLayer({
+    source: new ol.source.TileJSON({
+      uri: 'http://api.tiles.mapbox.com/v3/mapbox.va-quake-aug.jsonp'
+    })
+  })
 ]);
 
 var webglMap = new ol.Map(document.getElementById('webglMap'), {
diff --git a/exports/ol/layer/bingmaps.js b/exports/ol/layer/bingmaps.js
deleted file mode 100644
index c88492ea7a..0000000000
--- a/exports/ol/layer/bingmaps.js
+++ /dev/null
@@ -1,3 +0,0 @@
-goog.require('ol.layer.BingMaps');
-
-goog.exportSymbol('ol.layer.BingMaps', ol.layer.BingMaps);
diff --git a/exports/ol/layer/mapquest.js b/exports/ol/layer/mapquest.js
deleted file mode 100644
index 647e909861..0000000000
--- a/exports/ol/layer/mapquest.js
+++ /dev/null
@@ -1,5 +0,0 @@
-goog.require('ol.layer.MapQuestOSM');
-goog.require('ol.layer.MapQuestOpenAerial');
-
-goog.exportSymbol('ol.layer.MapQuestOSM', ol.layer.MapQuestOSM);
-goog.exportSymbol('ol.layer.MapQuestOpenAerial', ol.layer.MapQuestOpenAerial);
diff --git a/exports/ol/layer/openstreetmap.js b/exports/ol/layer/openstreetmap.js
deleted file mode 100644
index 876d559b89..0000000000
--- a/exports/ol/layer/openstreetmap.js
+++ /dev/null
@@ -1,3 +0,0 @@
-goog.require('ol.layer.OpenStreetMap');
-
-goog.exportSymbol('ol.layer.OpenStreetMap', ol.layer.OpenStreetMap);
diff --git a/exports/ol/layer/stamen.js b/exports/ol/layer/stamen.js
deleted file mode 100644
index 618bee1b52..0000000000
--- a/exports/ol/layer/stamen.js
+++ /dev/null
@@ -1,3 +0,0 @@
-goog.require('ol.layer.Stamen');
-
-goog.exportSymbol('ol.layer.Stamen', ol.layer.Stamen);
diff --git a/exports/ol/layer/tilejson.js b/exports/ol/layer/tilejson.js
deleted file mode 100644
index 4873692496..0000000000
--- a/exports/ol/layer/tilejson.js
+++ /dev/null
@@ -1,3 +0,0 @@
-goog.require('ol.layer.TileJSON');
-
-goog.exportSymbol('ol.layer.TileJSON', ol.layer.TileJSON);
diff --git a/exports/ol/layer/tilelayer.js b/exports/ol/layer/tilelayer.js
new file mode 100644
index 0000000000..03ff0d9027
--- /dev/null
+++ b/exports/ol/layer/tilelayer.js
@@ -0,0 +1,3 @@
+goog.require('ol.layer.TileLayer');
+
+goog.exportSymbol('ol.layer.TileLayer', ol.layer.TileLayer);
diff --git a/exports/ol/source/bingmaps.js b/exports/ol/source/bingmaps.js
new file mode 100644
index 0000000000..2ae79e68f7
--- /dev/null
+++ b/exports/ol/source/bingmaps.js
@@ -0,0 +1,3 @@
+goog.require('ol.source.BingMaps');
+
+goog.exportSymbol('ol.source.BingMaps', ol.source.BingMaps);
diff --git a/exports/ol/source/mapquest.js b/exports/ol/source/mapquest.js
new file mode 100644
index 0000000000..c1ae03cabc
--- /dev/null
+++ b/exports/ol/source/mapquest.js
@@ -0,0 +1,5 @@
+goog.require('ol.source.MapQuestOSM');
+goog.require('ol.source.MapQuestOpenAerial');
+
+goog.exportSymbol('ol.source.MapQuestOSM', ol.source.MapQuestOSM);
+goog.exportSymbol('ol.source.MapQuestOpenAerial', ol.source.MapQuestOpenAerial);
diff --git a/exports/ol/source/openstreetmap.js b/exports/ol/source/openstreetmap.js
new file mode 100644
index 0000000000..efb5b6d43a
--- /dev/null
+++ b/exports/ol/source/openstreetmap.js
@@ -0,0 +1,3 @@
+goog.require('ol.source.OpenStreetMap');
+
+goog.exportSymbol('ol.source.OpenStreetMap', ol.source.OpenStreetMap);
diff --git a/exports/ol/source/stamen.js b/exports/ol/source/stamen.js
new file mode 100644
index 0000000000..139103c1a8
--- /dev/null
+++ b/exports/ol/source/stamen.js
@@ -0,0 +1,3 @@
+goog.require('ol.source.Stamen');
+
+goog.exportSymbol('ol.source.Stamen', ol.source.Stamen);
diff --git a/exports/ol/source/tilejson.js b/exports/ol/source/tilejson.js
new file mode 100644
index 0000000000..f02e84fbad
--- /dev/null
+++ b/exports/ol/source/tilejson.js
@@ -0,0 +1,3 @@
+goog.require('ol.source.TileJSON');
+
+goog.exportSymbol('ol.source.TileJSON', ol.source.TileJSON);
diff --git a/src/ol/control/attribution.js b/src/ol/control/attribution.js
index 71bc8499ac..3df1dfff94 100644
--- a/src/ol/control/attribution.js
+++ b/src/ol/control/attribution.js
@@ -181,8 +181,8 @@ ol.control.Attribution.prototype.getLayerAttributionVisiblities_ =
   }
 
   var mapZ;
-  if (source instanceof ol.TileSource) {
-    var tileSource = /** @type {ol.TileSource} */ source;
+  if (source instanceof ol.source.TileSource) {
+    var tileSource = /** @type {ol.source.TileSource} */ source;
     var tileGrid = tileSource.getTileGrid();
     mapZ = tileGrid.getZForResolution(mapResolution);
   }
@@ -214,7 +214,7 @@ ol.control.Attribution.prototype.getLayerAttributionVisiblities_ =
     }
 
     if (!goog.isNull(coverageAreas)) {
-      if (source instanceof ol.TileSource) {
+      if (source instanceof ol.source.TileSource) {
         attributionVisible = goog.array.some(
             coverageAreas,
             function(coverageArea, index) {
diff --git a/src/ol/layer/layer.js b/src/ol/layer/layer.js
index f941d5963c..8b52fa81a9 100644
--- a/src/ol/layer/layer.js
+++ b/src/ol/layer/layer.js
@@ -1,9 +1,24 @@
 goog.provide('ol.layer.Layer');
+goog.provide('ol.layer.LayerOptions');
 goog.provide('ol.layer.LayerProperty');
 
+goog.require('goog.events');
+goog.require('goog.events.EventType');
 goog.require('goog.math');
 goog.require('ol.Object');
-goog.require('ol.Source');
+goog.require('ol.source.Source');
+
+
+/**
+ * @typedef {{brightness: (number|undefined),
+ *            contrast: (number|undefined),
+ *            hue: (number|undefined),
+ *            opacity: (number|undefined),
+ *            saturation: (number|undefined),
+ *            source: ol.source.Source,
+ *            visible: (boolean|undefined)}}
+ */
+ol.layer.LayerOptions;
 
 
 /**
@@ -23,34 +38,47 @@ ol.layer.LayerProperty = {
 /**
  * @constructor
  * @extends {ol.Object}
- * @param {ol.Source} source Source.
- * @param {Object.<string, *>=} opt_values Values.
+ * @param {ol.layer.LayerOptions} layerOptions LayerOptions.
  */
-ol.layer.Layer = function(source, opt_values) {
+ol.layer.Layer = function(layerOptions) {
 
   goog.base(this);
 
   /**
    * @private
-   * @type {ol.Source}
+   * @type {ol.source.Source}
    */
-  this.source_ = source;
+  this.source_ = layerOptions.source;
 
-  this.setBrightness(0);
-  this.setContrast(0);
-  this.setHue(0);
-  this.setOpacity(1);
-  this.setSaturation(0);
-  this.setVisible(true);
+  this.setBrightness(
+      goog.isDef(layerOptions.brightness) ? layerOptions.brightness : 0);
+  this.setContrast(
+      goog.isDef(layerOptions.contrast) ? layerOptions.contrast : 0);
+  this.setHue(
+      goog.isDef(layerOptions.hue) ? layerOptions.hue : 0);
+  this.setOpacity(
+      goog.isDef(layerOptions.opacity) ? layerOptions.opacity : 1);
+  this.setSaturation(
+      goog.isDef(layerOptions.saturation) ? layerOptions.saturation : 0);
+  this.setVisible(
+      goog.isDef(layerOptions.visible) ? layerOptions.visible : true);
 
-  if (goog.isDef(opt_values)) {
-    this.setValues(opt_values);
+  if (!this.source_.isReady()) {
+    goog.events.listenOnce(this.source_, goog.events.EventType.LOAD,
+        this.handleSourceLoad_, false, this);
   }
 
 };
 goog.inherits(ol.layer.Layer, ol.Object);
 
 
+/**
+ */
+ol.layer.Layer.prototype.dispatchLoadEvent = function() {
+  this.dispatchEvent(goog.events.EventType.LOAD);
+};
+
+
 /**
  * @return {number} Brightness.
  */
@@ -112,7 +140,7 @@ goog.exportProperty(
 
 
 /**
- * @return {ol.Source} Source.
+ * @return {ol.source.Source} Source.
  */
 ol.layer.Layer.prototype.getSource = function() {
   return this.source_;
@@ -131,6 +159,14 @@ goog.exportProperty(
     ol.layer.Layer.prototype.getVisible);
 
 
+/**
+ * @private
+ */
+ol.layer.Layer.prototype.handleSourceLoad_ = function() {
+  this.dispatchLoadEvent();
+};
+
+
 /**
  * @return {boolean} Is ready.
  */
diff --git a/src/ol/layer/openstreetmap.js b/src/ol/layer/openstreetmap.js
deleted file mode 100644
index f92c8492c8..0000000000
--- a/src/ol/layer/openstreetmap.js
+++ /dev/null
@@ -1,40 +0,0 @@
-goog.provide('ol.layer.OpenStreetMap');
-goog.provide('ol.source.OpenStreetMap');
-
-goog.require('ol.TileUrlFunction');
-goog.require('ol.layer.TileLayer');
-goog.require('ol.source.XYZ');
-
-
-
-/**
- * @constructor
- * @extends {ol.layer.TileLayer}
- * @param {Object.<string, *>=} opt_values Values.
- */
-ol.layer.OpenStreetMap = function(opt_values) {
-  var tileSource = new ol.source.OpenStreetMap();
-  goog.base(this, tileSource, opt_values);
-};
-goog.inherits(ol.layer.OpenStreetMap, ol.layer.TileLayer);
-
-
-
-/**
- * @constructor
- * @extends {ol.source.XYZ}
- */
-ol.source.OpenStreetMap = function() {
-
-  var tileUrlFunction = ol.TileUrlFunction.createFromTemplate(
-      'http://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png');
-
-  var attribution = new ol.Attribution(
-      '&copy; <a href="http://www.openstreetmap.org">OpenStreetMap</a> ' +
-      'contributors, ' +
-      '<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC BY-SA</a>');
-
-  goog.base(this, 18, tileUrlFunction, [attribution]);
-
-};
-goog.inherits(ol.source.OpenStreetMap, ol.source.XYZ);
diff --git a/src/ol/layer/tilelayer.js b/src/ol/layer/tilelayer.js
index 8b1ef4e387..3596e567ff 100644
--- a/src/ol/layer/tilelayer.js
+++ b/src/ol/layer/tilelayer.js
@@ -1,25 +1,25 @@
 goog.provide('ol.layer.TileLayer');
 
-goog.require('ol.TileSource');
 goog.require('ol.layer.Layer');
+goog.require('ol.layer.LayerOptions');
+goog.require('ol.source.TileSource');
 
 
 
 /**
  * @constructor
  * @extends {ol.layer.Layer}
- * @param {ol.TileSource} tileSource Tile source.
- * @param {Object.<string, *>=} opt_values Values.
+ * @param {ol.layer.LayerOptions} layerOptions Layer options.
  */
-ol.layer.TileLayer = function(tileSource, opt_values) {
-  goog.base(this, tileSource, opt_values);
+ol.layer.TileLayer = function(layerOptions) {
+  goog.base(this, layerOptions);
 };
 goog.inherits(ol.layer.TileLayer, ol.layer.Layer);
 
 
 /**
- * @return {ol.TileSource} Source.
+ * @return {ol.source.TileSource} Source.
  */
 ol.layer.TileLayer.prototype.getTileSource = function() {
-  return /** @type {ol.TileSource} */ this.getSource();
+  return /** @type {ol.source.TileSource} */ this.getSource();
 };
diff --git a/src/ol/layer/xyz.js b/src/ol/layer/xyz.js
deleted file mode 100644
index a7358d100b..0000000000
--- a/src/ol/layer/xyz.js
+++ /dev/null
@@ -1,118 +0,0 @@
-goog.provide('ol.layer.XYZ');
-goog.provide('ol.source.XYZ');
-goog.provide('ol.tilegrid.XYZ');
-
-goog.require('goog.math');
-goog.require('ol.Attribution');
-goog.require('ol.Coordinate');
-goog.require('ol.Projection');
-goog.require('ol.Size');
-goog.require('ol.TileCoord');
-goog.require('ol.TileGrid');
-goog.require('ol.TileSource');
-goog.require('ol.TileUrlFunction');
-goog.require('ol.layer.Layer');
-goog.require('ol.layer.TileLayer');
-
-
-
-/**
- * @constructor
- * @extends {ol.TileGrid}
- * @param {number} maxZoom Maximum zoom.
- * @param {ol.Size=} opt_tileSize Tile size.
- */
-ol.tilegrid.XYZ = function(maxZoom, opt_tileSize) {
-
-  var resolutions = new Array(maxZoom + 1);
-  var z;
-  for (z = 0; z <= maxZoom; ++z) {
-    resolutions[z] = ol.Projection.EPSG_3857_HALF_SIZE / (128 << z);
-  }
-
-  var extent = ol.Projection.EPSG_3857_EXTENT;
-  var origin = new ol.Coordinate(
-      -ol.Projection.EPSG_3857_HALF_SIZE, ol.Projection.EPSG_3857_HALF_SIZE);
-
-  goog.base(this, resolutions, extent, origin, opt_tileSize);
-
-};
-goog.inherits(ol.tilegrid.XYZ, ol.TileGrid);
-
-
-/**
- * @inheritDoc
- */
-ol.tilegrid.XYZ.prototype.forEachTileCoordParentTileRange =
-    function(tileCoord, callback, opt_obj) {
-  var x = tileCoord.x;
-  var y = tileCoord.y;
-  var z = tileCoord.z;
-  var tileRange;
-  while (true) {
-    z -= 1;
-    if (z < 0) {
-      break;
-    }
-    x = Math.floor(x / 2);
-    y = Math.floor(y / 2);
-    tileRange = new ol.TileRange(x, y, x, y);
-    if (callback.call(opt_obj, z, tileRange)) {
-      break;
-    }
-  }
-};
-
-
-
-/**
- * @constructor
- * @extends {ol.layer.TileLayer}
- * @param {number} maxZoom Maximum zoom.
- * @param {ol.TileUrlFunctionType} tileUrlFunction Tile URL function.
- * @param {Array.<ol.Attribution>=} opt_attributions Attributions.
- * @param {string=} opt_crossOrigin Cross origin.
- * @param {Object.<string, *>=} opt_values Values.
- */
-ol.layer.XYZ = function(
-    maxZoom, tileUrlFunction, opt_attributions, opt_crossOrigin, opt_values) {
-  var tileSource = new ol.source.XYZ(
-      maxZoom, tileUrlFunction, opt_attributions, opt_crossOrigin);
-  goog.base(this, tileSource, opt_values);
-};
-goog.inherits(ol.layer.XYZ, ol.layer.TileLayer);
-
-
-
-/**
- * @constructor
- * @extends {ol.TileSource}
- * @param {number} maxZoom Maximum zoom.
- * @param {ol.TileUrlFunctionType} tileUrlFunction Tile URL function.
- * @param {Array.<ol.Attribution>=} opt_attributions Attributions.
- * @param {string=} opt_crossOrigin Cross origin.
- */
-ol.source.XYZ =
-    function(maxZoom, tileUrlFunction, opt_attributions, opt_crossOrigin) {
-
-  var projection = ol.Projection.getFromCode('EPSG:3857');
-  var tileGrid = new ol.tilegrid.XYZ(maxZoom);
-  var tileUrlFunction2 = ol.TileUrlFunction.withTileCoordTransform(
-      function(tileCoord) {
-        var n = 1 << tileCoord.z;
-        var y = -tileCoord.y - 1;
-        if (y < 0 || n <= y) {
-          return null;
-        } else {
-          var x = goog.math.modulo(tileCoord.x, n);
-          return new ol.TileCoord(tileCoord.z, x, y);
-        }
-      },
-      tileUrlFunction);
-  var extent = projection.getExtent();
-
-  goog.base(this, projection, tileGrid, tileUrlFunction2, extent,
-      opt_attributions, opt_crossOrigin);
-
-};
-goog.inherits(ol.source.XYZ, ol.TileSource);
diff --git a/src/ol/source.js b/src/ol/source.js
deleted file mode 100644
index 2da3ed094c..0000000000
--- a/src/ol/source.js
+++ /dev/null
@@ -1,96 +0,0 @@
-goog.provide('ol.Source');
-
-goog.require('goog.functions');
-goog.require('ol.Attribution');
-goog.require('ol.Extent');
-goog.require('ol.Projection');
-
-
-
-/**
- * @constructor
- * @param {ol.Projection} projection Projection.
- * @param {ol.Extent=} opt_extent Extent.
- * @param {Array.<ol.Attribution>=} opt_attributions Attributions.
- */
-ol.Source = function(projection, opt_extent, opt_attributions) {
-
-  /**
-   * @private
-   * @type {ol.Projection}
-   */
-  this.projection_ = projection;
-
-  /**
-   * @private
-   * @type {ol.Extent}
-   */
-  this.extent_ = opt_extent || projection.getExtent();
-
-  /**
-   * @private
-   * @type {Array.<ol.Attribution>}
-   */
-  this.attributions_ = opt_attributions || null;
-
-};
-
-
-/**
- * @return {Array.<ol.Attribution>} Attributions.
- */
-ol.Source.prototype.getAttributions = function() {
-  return this.attributions_;
-};
-
-
-/**
- * @return {ol.Extent} Extent.
- */
-ol.Source.prototype.getExtent = function() {
-  return this.extent_;
-};
-
-
-/**
- * @return {ol.Projection} Projection.
- */
-ol.Source.prototype.getProjection = function() {
-  return this.projection_;
-};
-
-
-/**
- * @return {Array.<number>|undefined} Resolutions.
- */
-ol.Source.prototype.getResolutions = goog.abstractMethod;
-
-
-/**
- * @return {boolean} Is ready.
- */
-ol.Source.prototype.isReady = goog.functions.TRUE;
-
-
-/**
- * @param {Array.<ol.Attribution>} attributions Attributions.
- */
-ol.Source.prototype.setAttributions = function(attributions) {
-  this.attributions_ = attributions;
-};
-
-
-/**
- * @param {ol.Extent} extent Extent.
- */
-ol.Source.prototype.setExtent = function(extent) {
-  this.extent_ = extent;
-};
-
-
-/**
- * @param {ol.Projection} projection Projetion.
- */
-ol.Source.prototype.setProjection = function(projection) {
-  this.projection_ = projection;
-};
diff --git a/src/ol/layer/bingmaps.js b/src/ol/source/bingmaps.js
similarity index 67%
rename from src/ol/layer/bingmaps.js
rename to src/ol/source/bingmaps.js
index ce75d65aa1..0311a8aa4f 100644
--- a/src/ol/layer/bingmaps.js
+++ b/src/ol/source/bingmaps.js
@@ -1,4 +1,3 @@
-goog.provide('ol.layer.BingMaps');
 goog.provide('ol.source.BingMaps');
 
 goog.require('goog.Uri');
@@ -6,8 +5,7 @@ goog.require('goog.events');
 goog.require('goog.events.EventType');
 goog.require('goog.net.Jsonp');
 goog.require('ol.TileCoverageArea');
-goog.require('ol.TileSource');
-goog.require('ol.layer.TileLayer');
+goog.require('ol.source.TileSource');
 goog.require('ol.tilegrid.XYZ');
 
 
@@ -23,43 +21,32 @@ ol.BingMapsStyle = {
 };
 
 
-
 /**
- * @constructor
- * @extends {ol.layer.TileLayer}
- * @param {ol.BingMapsStyle} style Bing Maps style.
- * @param {string} key Key.
- * @param {string=} opt_culture Culture.
- * @param {Object.<string, *>=} opt_values Values.
+ * @typedef {{culture: (string|undefined),
+ *            key: string,
+ *            style: ol.BingMapsStyle}}
  */
-ol.layer.BingMaps = function(style, key, opt_culture, opt_values) {
-  var tileSource = new ol.source.BingMaps(style, key, opt_culture,
-      function(tileSource) {
-        this.dispatchEvent(goog.events.EventType.LOAD);
-      }, this);
-  goog.base(this, tileSource, opt_values);
-};
-goog.inherits(ol.layer.BingMaps, ol.layer.TileLayer);
+ol.source.BingMapsOptions;
 
 
 
 /**
  * @constructor
- * @extends {ol.TileSource}
- * @param {ol.BingMapsStyle} style Bing Maps style.
- * @param {string} key Key.
- * @param {string=} opt_culture Culture.
- * @param {?function(ol.source.BingMaps)=} opt_callback Callback.
- * @param {*=} opt_obj Object.
+ * @extends {ol.source.TileSource}
+ * @param {ol.source.BingMapsOptions} bingMapsOptions Bing Maps options.
  */
-ol.source.BingMaps =
-    function(style, key, opt_culture, opt_callback, opt_obj) {
+ol.source.BingMaps = function(bingMapsOptions) {
+
+  goog.base(this, {
+    projection: ol.Projection.getFromCode('EPSG:3857')
+  });
 
   /**
    * @private
    * @type {string}
    */
-  this.culture_ = opt_culture || 'en-us';
+  this.culture_ = goog.isDef(bingMapsOptions.culture) ?
+      bingMapsOptions.culture : 'en-us';
 
   /**
    * @private
@@ -67,34 +54,17 @@ ol.source.BingMaps =
    */
   this.ready_ = false;
 
-  /**
-   * @private
-   * @type {?function(ol.source.BingMaps)}
-   */
-  this.callback_ = opt_callback || null;
-
-  /**
-   * @private
-   * @type {*}
-   */
-  this.object_ = opt_obj;
-
   var uri = new goog.Uri(
-      'http://dev.virtualearth.net/REST/v1/Imagery/Metadata/' + style);
+      'http://dev.virtualearth.net/REST/v1/Imagery/Metadata/' +
+      bingMapsOptions.style);
   var jsonp = new goog.net.Jsonp(uri, 'jsonp');
   jsonp.send({
     'include': 'ImageryProviders',
-    'key': key
+    'key': bingMapsOptions.key
   }, goog.bind(this.handleImageryMetadataResponse, this));
 
-  var projection = ol.Projection.getFromCode('EPSG:3857');
-  var extent = projection.getExtent();
-
-  goog.base(
-      this, projection, null, ol.TileUrlFunction.nullTileUrlFunction, extent);
-
 };
-goog.inherits(ol.source.BingMaps, ol.TileSource);
+goog.inherits(ol.source.BingMaps, ol.source.TileSource);
 
 
 /**
@@ -118,7 +88,10 @@ ol.source.BingMaps.prototype.handleImageryMetadataResponse =
   var zoomMin = resource.zoomMin;
   var zoomMax = resource.zoomMax;
   var tileSize = new ol.Size(resource.imageWidth, resource.imageHeight);
-  var tileGrid = new ol.tilegrid.XYZ(zoomMax, tileSize);
+  var tileGrid = new ol.tilegrid.XYZ({
+    maxZoom: zoomMax,
+    tileSize: tileSize
+  });
   this.tileGrid = tileGrid;
 
   this.tileUrlFunction = ol.TileUrlFunction.withTileCoordTransform(
@@ -172,11 +145,7 @@ ol.source.BingMaps.prototype.handleImageryMetadataResponse =
 
   this.ready_ = true;
 
-  if (!goog.isNull(this.callback_)) {
-    this.callback_.call(this.object_, this);
-    this.callback_ = null;
-    this.object_ = null;
-  }
+  this.dispatchLoadEvent();
 
 };
 
diff --git a/src/ol/layer/mapquest.js b/src/ol/source/mapquest.js
similarity index 51%
rename from src/ol/layer/mapquest.js
rename to src/ol/source/mapquest.js
index cf2e02f50c..08fb316632 100644
--- a/src/ol/layer/mapquest.js
+++ b/src/ol/source/mapquest.js
@@ -1,21 +1,16 @@
-goog.provide('ol.layer.MapQuestOSM');
-goog.provide('ol.layer.MapQuestOpenAerial');
+goog.provide('ol.source.MapQuestOSM');
+goog.provide('ol.source.MapQuestOpenAerial');
 
 goog.require('ol.Attribution');
-goog.require('ol.TileUrlFunction');
-goog.require('ol.layer.XYZ');
+goog.require('ol.source.XYZ');
 
 
 
 /**
  * @constructor
- * @extends {ol.layer.XYZ}
- * @param {Object.<string, *>=} opt_values Values.
+ * @extends {ol.source.XYZ}
  */
-ol.layer.MapQuestOSM = function(opt_values) {
-
-  var tileUrlFunction = ol.TileUrlFunction.createFromTemplate(
-      'http://otile{1-4}.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.jpg');
+ol.source.MapQuestOSM = function() {
 
   var attributions = [
     new ol.Attribution(
@@ -29,22 +24,22 @@ ol.layer.MapQuestOSM = function(opt_values) {
         '<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC BY-SA</a>')
   ];
 
-  goog.base(this, 18, tileUrlFunction, attributions);
+  goog.base(this, {
+    attributions: attributions,
+    maxZoom: 28,
+    url: 'http://otile{1-4}.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.jpg'
+  });
 
 };
-goog.inherits(ol.layer.MapQuestOSM, ol.layer.XYZ);
+goog.inherits(ol.source.MapQuestOSM, ol.source.XYZ);
 
 
 
 /**
  * @constructor
- * @extends {ol.layer.XYZ}
- * @param {Object.<string, *>=} opt_values Values.
+ * @extends {ol.source.XYZ}
  */
-ol.layer.MapQuestOpenAerial = function(opt_values) {
-
-  var tileUrlFunction = ol.TileUrlFunction.createFromTemplate(
-      'http://oatile{1-4}.mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg');
+ol.source.MapQuestOpenAerial = function() {
 
   var attributions = [
     new ol.Attribution(
@@ -56,7 +51,11 @@ ol.layer.MapQuestOpenAerial = function(opt_values) {
         'U.S. Depart. of Agriculture, Farm Service Agency')
   ];
 
-  goog.base(this, 18, tileUrlFunction, attributions);
+  goog.base(this, {
+    attributions: attributions,
+    maxZoom: 18,
+    url: 'http://oatile{1-4}.mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg'
+  });
 
 };
-goog.inherits(ol.layer.MapQuestOpenAerial, ol.layer.XYZ);
+goog.inherits(ol.source.MapQuestOpenAerial, ol.source.XYZ);
diff --git a/src/ol/source/openstreetmap.js b/src/ol/source/openstreetmap.js
new file mode 100644
index 0000000000..7245827837
--- /dev/null
+++ b/src/ol/source/openstreetmap.js
@@ -0,0 +1,25 @@
+goog.provide('ol.source.OpenStreetMap');
+
+goog.require('ol.source.XYZ');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.source.XYZ}
+ */
+ol.source.OpenStreetMap = function() {
+
+  var attribution = new ol.Attribution(
+      '&copy; <a href="http://www.openstreetmap.org">OpenStreetMap</a> ' +
+      'contributors, ' +
+      '<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC BY-SA</a>');
+
+  goog.base(this, {
+    attributions: [attribution],
+    maxZoom: 18,
+    url: 'http://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'
+  });
+
+};
+goog.inherits(ol.source.OpenStreetMap, ol.source.XYZ);
diff --git a/src/ol/source/source.js b/src/ol/source/source.js
new file mode 100644
index 0000000000..999a220c38
--- /dev/null
+++ b/src/ol/source/source.js
@@ -0,0 +1,119 @@
+goog.provide('ol.source.Source');
+
+goog.require('goog.events.EventTarget');
+goog.require('goog.events.EventType');
+goog.require('goog.functions');
+goog.require('ol.Attribution');
+goog.require('ol.Extent');
+goog.require('ol.Projection');
+goog.require('ol.TileUrlFunction');
+
+
+/**
+ * @typedef {{attribtions: (Array.<ol.Attribution>|undefined),
+ *            extent: (ol.Extent|undefined),
+ *            projection: (ol.Projection|undefined)}}
+ */
+ol.source.SourceOptions;
+
+
+
+/**
+ * @constructor
+ * @extends {goog.events.EventTarget}
+ * @param {ol.source.SourceOptions} sourceOptions Source options.
+ */
+ol.source.Source = function(sourceOptions) {
+
+  goog.base(this);
+
+  /**
+   * @private
+   * @type {ol.Projection}
+   */
+  this.projection_ = goog.isDef(sourceOptions.projection) ?
+      sourceOptions.projection : null;
+
+  /**
+   * @private
+   * @type {ol.Extent}
+   */
+  this.extent_ = goog.isDef(sourceOptions.extent) ?
+      sourceOptions.extent : sourceOptions.projection.getExtent();
+
+  /**
+   * @private
+   * @type {Array.<ol.Attribution>}
+   */
+  this.attributions_ = goog.isDef(sourceOptions.attributions) ?
+      sourceOptions.attributions : null;
+
+};
+goog.inherits(ol.source.Source, goog.events.EventTarget);
+
+
+/**
+ */
+ol.source.Source.prototype.dispatchLoadEvent = function() {
+  this.dispatchEvent(goog.events.EventType.LOAD);
+};
+
+
+/**
+ * @return {Array.<ol.Attribution>} Attributions.
+ */
+ol.source.Source.prototype.getAttributions = function() {
+  return this.attributions_;
+};
+
+
+/**
+ * @return {ol.Extent} Extent.
+ */
+ol.source.Source.prototype.getExtent = function() {
+  return this.extent_;
+};
+
+
+/**
+ * @return {ol.Projection} Projection.
+ */
+ol.source.Source.prototype.getProjection = function() {
+  return this.projection_;
+};
+
+
+/**
+ * @return {Array.<number>|undefined} Resolutions.
+ */
+ol.source.Source.prototype.getResolutions = goog.abstractMethod;
+
+
+/**
+ * @return {boolean} Is ready.
+ */
+ol.source.Source.prototype.isReady = goog.functions.TRUE;
+
+
+/**
+ * @param {Array.<ol.Attribution>} attributions Attributions.
+ */
+ol.source.Source.prototype.setAttributions = function(attributions) {
+  this.attributions_ = attributions;
+};
+
+
+/**
+ * @param {ol.Extent} extent Extent.
+ */
+ol.source.Source.prototype.setExtent = function(extent) {
+  this.extent_ = extent;
+};
+
+
+/**
+ * @param {ol.Projection} projection Projetion.
+ */
+ol.source.Source.prototype.setProjection = function(projection) {
+  this.projection_ = projection;
+};
diff --git a/src/ol/layer/stamen.js b/src/ol/source/stamen.js
similarity index 53%
rename from src/ol/layer/stamen.js
rename to src/ol/source/stamen.js
index 0191ee74b9..d4549b8c95 100644
--- a/src/ol/layer/stamen.js
+++ b/src/ol/source/stamen.js
@@ -1,26 +1,14 @@
 // FIXME Configure minZoom when supported by TileGrid
 
-goog.provide('ol.layer.Stamen');
 goog.provide('ol.source.Stamen');
 
-goog.require('ol.TileUrlFunction');
-goog.require('ol.layer.XYZ');
+goog.require('ol.source.XYZ');
 
 
 /**
  * @enum {string}
  */
-ol.StamenProvider = {
-  TERRAIN: 'terrain',
-  TONER: 'toner',
-  WATERCOLOR: 'watercolor'
-};
-
-
-/**
- * @enum {string}
- */
-ol.StamenFlavor = {
+ol.source.StamenFlavor = {
   TERRAIN_BACKGROUND: 'background',
   TERRAIN_LABELS: 'labels',
   TERRAIN_LINES: 'lines',
@@ -38,21 +26,38 @@ ol.StamenFlavor = {
 
 
 /**
- * @type {Object.<ol.StamenProvider,
+ * @typedef {{flavor: ol.source.StamenFlavor,
+ *            provider: ol.source.StamenProvider}}
+ */
+ol.source.StamenOptions;
+
+
+/**
+ * @enum {string}
+ */
+ol.source.StamenProvider = {
+  TERRAIN: 'terrain',
+  TONER: 'toner',
+  WATERCOLOR: 'watercolor'
+};
+
+
+/**
+ * @type {Object.<ol.source.StamenProvider,
  *                {type: string, minZoom: number, maxZoom: number}>}
  */
-ol.StamenProviderConfig = {};
-ol.StamenProviderConfig[ol.StamenProvider.TERRAIN] = {
+ol.source.StamenProviderConfig = {};
+ol.source.StamenProviderConfig[ol.source.StamenProvider.TERRAIN] = {
   type: 'jpg',
   minZoom: 4,
   maxZoom: 18
 };
-ol.StamenProviderConfig[ol.StamenProvider.TONER] = {
+ol.source.StamenProviderConfig[ol.source.StamenProvider.TONER] = {
   type: 'png',
   minZoom: 0,
   maxZoom: 20
 };
-ol.StamenProviderConfig[ol.StamenProvider.WATERCOLOR] = {
+ol.source.StamenProviderConfig[ol.source.StamenProvider.WATERCOLOR] = {
   type: 'jpg',
   minZoom: 3,
   maxZoom: 16
@@ -62,21 +67,10 @@ ol.StamenProviderConfig[ol.StamenProvider.WATERCOLOR] = {
 
 /**
  * @constructor
- * @extends {ol.layer.XYZ}
- * @param {ol.StamenProvider} provider Provider.
- * @param {ol.StamenFlavor=} opt_flavor Flavor.
- * @param {Object.<string, *>=} opt_values Values.
+ * @extends {ol.source.XYZ}
+ * @param {ol.source.StamenOptions} stamenOptions Stamen options.
  */
-ol.layer.Stamen = function(provider, opt_flavor, opt_values) {
-
-  var config = ol.StamenProviderConfig[provider];
-
-  var layer = provider;
-  if (goog.isDef(opt_flavor)) {
-    layer += '-' + opt_flavor;
-  }
-  var tileUrlFunction = ol.TileUrlFunction.createFromTemplate(
-      'http://{a-d}.tile.stamen.com/' + layer + '/{z}/{x}/{y}.' + config.type);
+ol.source.Stamen = function(stamenOptions) {
 
   var attribution = new ol.Attribution(
       'Map tiles by <a href="http://stamen.com">Stamen Design</a>, ' +
@@ -86,7 +80,18 @@ ol.layer.Stamen = function(provider, opt_flavor, opt_values) {
       'under ' +
       '<a href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.');
 
-  goog.base(this, config.maxZoom, tileUrlFunction, [attribution]);
+  var layer = stamenOptions.provider;
+  if (goog.isDef(stamenOptions.flavor)) {
+    layer += '-' + stamenOptions.flavor;
+  }
+
+  var config = ol.source.StamenProviderConfig[stamenOptions.provider];
+
+  goog.base(this, {
+    attributions: [attribution],
+    maxZoom: config.maxZoom,
+    url: 'http://{a-d}.tile.stamen.com/' + layer + '/{z}/{x}/{y}.' + config.type
+  });
 
 };
-goog.inherits(ol.layer.Stamen, ol.layer.XYZ);
+goog.inherits(ol.source.Stamen, ol.source.XYZ);
diff --git a/src/ol/layer/tilejson.js b/src/ol/source/tilejson.js
similarity index 66%
rename from src/ol/layer/tilejson.js
rename to src/ol/source/tilejson.js
index a16f0ce25e..d705320993 100644
--- a/src/ol/layer/tilejson.js
+++ b/src/ol/source/tilejson.js
@@ -1,12 +1,11 @@
 // FIXME add some error checking
 // FIXME check order of async callbacks
-// FIXME use minzoom when supported by ol.TileGrid
+// FIXME use minzoom when supported by ol.tilegrid.TileGrid
 
 /**
  * @see http://mapbox.com/developers/api/
  */
 
-goog.provide('ol.layer.TileJSON');
 goog.provide('ol.source.TileJSON');
 goog.provide('ol.tilejson');
 
@@ -14,10 +13,16 @@ goog.require('goog.asserts');
 goog.require('goog.events.EventType');
 goog.require('goog.net.jsloader');
 goog.require('goog.string');
+goog.require('ol.Projection');
 goog.require('ol.TileCoverageArea');
-goog.require('ol.TileSource');
 goog.require('ol.TileUrlFunction');
-goog.require('ol.layer.TileLayer');
+goog.require('ol.source.TileSource');
+
+
+/**
+ * @typedef {{uri: string}}
+ */
+ol.source.TileJSONOptions;
 
 
 /**
@@ -39,46 +44,14 @@ goog.exportSymbol('grid', grid);
 
 /**
  * @constructor
- * @extends {ol.layer.TileLayer}
- * @param {string} url URL.
- * @param {Object.<string, *>=} opt_values Values.
+ * @extends {ol.source.TileSource}
+ * @param {ol.source.TileJSONOptions} tileJsonOptions TileJSON optios.
  */
-ol.layer.TileJSON = function(url, opt_values) {
-  goog.asserts.assert(goog.string.endsWith(url, '.jsonp'));
-  var tileSource = new ol.source.TileJSON(url, function(tileSource) {
-    this.dispatchEvent(goog.events.EventType.LOAD);
-  }, this);
-  goog.base(this, tileSource, opt_values);
-};
-goog.inherits(ol.layer.TileJSON, ol.layer.TileLayer);
+ol.source.TileJSON = function(tileJsonOptions) {
 
-
-
-/**
- * @constructor
- * @extends {ol.TileSource}
- * @param {string} uri URI.
- * @param {?function(ol.source.TileJSON)=} opt_callback Callback.
- * @param {*=} opt_obj Object.
- */
-ol.source.TileJSON = function(uri, opt_callback, opt_obj) {
-
-  var projection = ol.Projection.getFromCode('EPSG:3857');
-
-  goog.base(
-      this, projection, null, ol.TileUrlFunction.nullTileUrlFunction, null);
-
-  /**
-   * @private
-   * @type {?function(ol.source.TileJSON)}
-   */
-  this.callback_ = opt_callback || null;
-
-  /**
-   * @private
-   * @type {*}
-   */
-  this.object_ = opt_obj;
+  goog.base(this, {
+    projection: ol.Projection.getFromCode('EPSG:3857')
+  });
 
   /**
    * @private
@@ -90,11 +63,12 @@ ol.source.TileJSON = function(uri, opt_callback, opt_obj) {
    * @private
    * @type {!goog.async.Deferred}
    */
-  this.deferred_ = goog.net.jsloader.load(uri, {cleanupWhenDone: true});
+  this.deferred_ =
+      goog.net.jsloader.load(tileJsonOptions.uri, {cleanupWhenDone: true});
   this.deferred_.addCallback(this.handleTileJSONResponse, this);
 
 };
-goog.inherits(ol.source.TileJSON, ol.TileSource);
+goog.inherits(ol.source.TileJSON, ol.source.TileSource);
 
 
 /**
@@ -126,7 +100,9 @@ ol.source.TileJSON.prototype.handleTileJSONResponse = function() {
   var minzoom = tileJSON.minzoom || 0;
   goog.asserts.assert(minzoom === 0); // FIXME
   var maxzoom = tileJSON.maxzoom || 22;
-  var tileGrid = new ol.tilegrid.XYZ(maxzoom);
+  var tileGrid = new ol.tilegrid.XYZ({
+    maxZoom: maxzoom
+  });
   this.tileGrid = tileGrid;
 
   this.tileUrlFunction = ol.TileUrlFunction.withTileCoordTransform(
@@ -164,11 +140,7 @@ ol.source.TileJSON.prototype.handleTileJSONResponse = function() {
 
   this.ready_ = true;
 
-  if (!goog.isNull(this.callback_)) {
-    this.callback_.call(this.object_, this);
-    this.callback_ = null;
-    this.object_ = null;
-  }
+  this.dispatchLoadEvent();
 
 };
 
diff --git a/src/ol/source/tilesource.js b/src/ol/source/tilesource.js
new file mode 100644
index 0000000000..bd8293f7d3
--- /dev/null
+++ b/src/ol/source/tilesource.js
@@ -0,0 +1,118 @@
+goog.provide('ol.source.TileSource');
+goog.provide('ol.source.TileSourceOptions');
+
+goog.require('ol.Attribution');
+goog.require('ol.Extent');
+goog.require('ol.Projection');
+goog.require('ol.Tile');
+goog.require('ol.TileCoord');
+goog.require('ol.TileUrlFunction');
+goog.require('ol.TileUrlFunctionType');
+goog.require('ol.source.Source');
+goog.require('ol.tilegrid.TileGrid');
+
+
+/**
+ * @typedef {{attributions: (Array.<ol.Attribution>|undefined),
+ *            crossOrigin: (string|undefined),
+ *            extent: (ol.Extent|undefined),
+ *            projection: (ol.Projection|undefined),
+ *            tileGrid: (ol.tilegrid.TileGrid|undefined),
+ *            tileUrlFunction: (ol.TileUrlFunctionType|undefined)}}
+ */
+ol.source.TileSourceOptions;
+
+
+
+/**
+ * @constructor
+ * @extends {ol.source.Source}
+ * @param {ol.source.TileSourceOptions} tileSourceOptions Tile source options.
+ */
+ol.source.TileSource = function(tileSourceOptions) {
+
+  goog.base(this, {
+    attributions: tileSourceOptions.attributions,
+    extent: tileSourceOptions.extent,
+    projection: tileSourceOptions.projection
+  });
+
+  /**
+   * @protected
+   * @type {ol.tilegrid.TileGrid}
+   */
+  this.tileGrid = goog.isDef(tileSourceOptions.tileGrid) ?
+      tileSourceOptions.tileGrid : null;
+
+  /**
+   * @protected
+   * @type {ol.TileUrlFunctionType}
+   */
+  this.tileUrlFunction = goog.isDef(tileSourceOptions.tileUrlFunction) ?
+      tileSourceOptions.tileUrlFunction :
+      ol.TileUrlFunction.nullTileUrlFunction;
+
+  /**
+   * @private
+   * @type {?string}
+   */
+  this.crossOrigin_ = goog.isDef(tileSourceOptions.crossOrigin) ?
+      tileSourceOptions.crossOrigin : 'anonymous';
+
+  /**
+   * @private
+   * @type {Object.<string, ol.Tile>}
+   * FIXME will need to expire elements from this cache
+   * FIXME see elemoine's work with goog.structs.LinkedMap
+   */
+  this.tileCache_ = {};
+
+};
+goog.inherits(ol.source.TileSource, ol.source.Source);
+
+
+/**
+ * @inheritDoc
+ */
+ol.source.TileSource.prototype.getResolutions = function() {
+  return this.tileGrid.getResolutions();
+};
+
+
+/**
+ * @param {ol.TileCoord} tileCoord Tile coordinate.
+ * @return {ol.Tile} Tile.
+ */
+ol.source.TileSource.prototype.getTile = function(tileCoord) {
+  var key = tileCoord.toString();
+  if (goog.object.containsKey(this.tileCache_, key)) {
+    return this.tileCache_[key];
+  } else {
+    var tileUrl = this.getTileCoordUrl(tileCoord);
+    var tile;
+    if (goog.isDef(tileUrl)) {
+      tile = new ol.Tile(tileCoord, tileUrl, this.crossOrigin_);
+    } else {
+      tile = null;
+    }
+    this.tileCache_[key] = tile;
+    return tile;
+  }
+};
+
+
+/**
+ * @param {ol.TileCoord} tileCoord Tile coordinate.
+ * @return {string|undefined} Tile URL.
+ */
+ol.source.TileSource.prototype.getTileCoordUrl = function(tileCoord) {
+  return this.tileUrlFunction(tileCoord);
+};
+
+
+/**
+ * @return {ol.tilegrid.TileGrid} Tile grid.
+ */
+ol.source.TileSource.prototype.getTileGrid = function() {
+  return this.tileGrid;
+};
diff --git a/src/ol/source/xyz.js b/src/ol/source/xyz.js
new file mode 100644
index 0000000000..b79871a676
--- /dev/null
+++ b/src/ol/source/xyz.js
@@ -0,0 +1,109 @@
+// FIXME add minZoom support
+
+goog.provide('ol.source.XYZ');
+goog.provide('ol.source.XYZOptions');
+
+goog.require('goog.math');
+goog.require('ol.Attribution');
+goog.require('ol.Coordinate');
+goog.require('ol.Projection');
+goog.require('ol.Size');
+goog.require('ol.TileCoord');
+goog.require('ol.TileUrlFunction');
+goog.require('ol.TileUrlFunctionType');
+goog.require('ol.source.TileSource');
+goog.require('ol.tilegrid.XYZ');
+
+
+/**
+ * @typedef {{attributions: (Array.<ol.Attribution>|undefined),
+ *            crossOrigin: (string|undefined),
+ *            extent: (ol.Extent|undefined),
+ *            maxZoom: number,
+ *            tileUrlFunction: (ol.TileUrlFunctionType|undefined),
+ *            url: (string|undefined),
+ *            urls: (Array.<string>|undefined)}}
+ */
+ol.source.XYZOptions;
+
+
+
+/**
+ * @constructor
+ * @extends {ol.source.TileSource}
+ * @param {ol.source.XYZOptions} xyzOptions XYZ options.
+ */
+ol.source.XYZ = function(xyzOptions) {
+
+  /**
+   * @type {ol.TileUrlFunctionType}
+   */
+  var tileUrlFunction = ol.TileUrlFunction.nullTileUrlFunction;
+  // FIXME use goog.nullFunction ?
+  if (goog.isDef(xyzOptions.tileUrlFunction)) {
+    tileUrlFunction = xyzOptions.tileUrlFunction;
+  } else if (goog.isDef(xyzOptions.urls)) {
+    tileUrlFunction = ol.TileUrlFunction.createFromTemplates(xyzOptions.urls);
+  } else if (goog.isDef(xyzOptions.url)) {
+    tileUrlFunction = ol.TileUrlFunction.createFromTemplate(xyzOptions.url);
+  }
+
+  var tileGrid = new ol.tilegrid.XYZ({
+    maxZoom: xyzOptions.maxZoom
+  });
+
+  // FIXME factor out common code
+  var extent = xyzOptions.extent;
+  if (goog.isDefAndNotNull(extent)) {
+
+    tileUrlFunction = ol.TileUrlFunction.withTileCoordTransform(
+        function(tileCoord) {
+          if (xyzOptions.maxZoom < tileCoord.z) {
+            return null;
+          }
+          var n = 1 << tileCoord.z;
+          var y = -tileCoord.y - 1;
+          if (y < 0 || n <= y) {
+            return null;
+          }
+          var x = goog.math.modulo(tileCoord.x, n);
+          var tileExtent = tileGrid.getTileCoordExtent(
+              new ol.TileCoord(tileCoord.z, x, tileCoord.y));
+          // FIXME we shouldn't need a typecast here
+          if (!tileExtent.intersects(/** @type {ol.Extent} */ (extent))) {
+            return null;
+          }
+          return new ol.TileCoord(tileCoord.z, x, y);
+        },
+        tileUrlFunction);
+
+  } else {
+
+    tileUrlFunction = ol.TileUrlFunction.withTileCoordTransform(
+        function(tileCoord) {
+          if (xyzOptions.maxZoom < tileCoord.z) {
+            return null;
+          }
+          var n = 1 << tileCoord.z;
+          var y = -tileCoord.y - 1;
+          if (y < 0 || n <= y) {
+            return null;
+          } else {
+            var x = goog.math.modulo(tileCoord.x, n);
+            return new ol.TileCoord(tileCoord.z, x, y);
+          }
+        },
+        tileUrlFunction);
+  }
+
+  goog.base(this, {
+    attributions: xyzOptions.attributions,
+    crossOrigin: xyzOptions.crossOrigin,
+    extent: xyzOptions.extent,
+    projection: ol.Projection.getFromCode('EPSG:3857'),
+    tileGrid: tileGrid,
+    tileUrlFunction: tileUrlFunction
+  });
+
+};
+goog.inherits(ol.source.XYZ, ol.source.TileSource);
diff --git a/src/ol/tilecoveragearea.js b/src/ol/tilecoveragearea.js
index d6284ec450..f09e1d1797 100644
--- a/src/ol/tilecoveragearea.js
+++ b/src/ol/tilecoveragearea.js
@@ -2,14 +2,14 @@ goog.provide('ol.TileCoverageArea');
 
 goog.require('ol.CoverageArea');
 goog.require('ol.Extent');
-goog.require('ol.TileGrid');
+goog.require('ol.tilegrid.TileGrid');
 
 
 
 /**
  * @constructor
  * @extends {ol.CoverageArea}
- * @param {ol.TileGrid} tileGrid Tile grid.
+ * @param {ol.tilegrid.TileGrid} tileGrid Tile grid.
  * @param {ol.Extent} extent Extent.
  * @param {number} minZ Minimum Z.
  * @param {number} maxZ Maximum Z.
@@ -20,7 +20,7 @@ ol.TileCoverageArea = function(tileGrid, extent, minZ, maxZ) {
 
   /**
    * @private
-   * @type {ol.TileGrid}
+   * @type {ol.tilegrid.TileGrid}
    */
   this.tileGrid_ = tileGrid;
 
diff --git a/src/ol/tilegrid.js b/src/ol/tilegrid/tilegrid.js
similarity index 74%
rename from src/ol/tilegrid.js
rename to src/ol/tilegrid/tilegrid.js
index cf3ca5dc0f..bdce78ae2d 100644
--- a/src/ol/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -1,6 +1,7 @@
 // FIXME cope with tile grids whose minium zoom is not zero
 
-goog.provide('ol.TileGrid');
+goog.provide('ol.tilegrid.TileGrid');
+goog.provide('ol.tilegrid.TileGridOptions');
 
 goog.require('goog.array');
 goog.require('goog.asserts');
@@ -13,22 +14,29 @@ goog.require('ol.TileRange');
 goog.require('ol.array');
 
 
+/**
+ * @typedef {{extent: (ol.Extent|undefined),
+ *            origin: (ol.Coordinate|undefined),
+ *            origins: (Array.<ol.Coordinate>|undefined),
+ *            resolutions: !Array.<number>,
+ *            tileSize: (ol.Size|undefined)}}
+ */
+ol.tilegrid.TileGridOptions;
+
+
 
 /**
  * @constructor
- * @param {!Array.<number>} resolutions Resolutions.
- * @param {ol.Extent} extent Extent.
- * @param {ol.Coordinate|!Array.<ol.Coordinate>} origin Origin.
- * @param {ol.Size=} opt_tileSize Tile size.
+ * @param {ol.tilegrid.TileGridOptions} tileGridOptions Tile grid options.
  */
-ol.TileGrid = function(resolutions, extent, origin, opt_tileSize) {
+ol.tilegrid.TileGrid = function(tileGridOptions) {
 
   /**
    * @private
-   * @type {Array.<number>}
+   * @type {!Array.<number>}
    */
-  this.resolutions_ = resolutions;
-  goog.asserts.assert(goog.array.isSorted(resolutions, function(a, b) {
+  this.resolutions_ = tileGridOptions.resolutions;
+  goog.asserts.assert(goog.array.isSorted(this.resolutions_, function(a, b) {
     return b - a;
   }, true));
 
@@ -42,34 +50,32 @@ ol.TileGrid = function(resolutions, extent, origin, opt_tileSize) {
    * @private
    * @type {ol.Extent}
    */
-  this.extent_ = extent;
+  this.extent_ = goog.isDef(tileGridOptions.extent) ?
+      tileGridOptions.extent : null;
 
   /**
    * @private
    * @type {ol.Coordinate}
    */
-  this.origin_ = null;
+  this.origin_ = goog.isDef(tileGridOptions.origin) ?
+      tileGridOptions.origin : null;
 
   /**
    * @private
    * @type {Array.<ol.Coordinate>}
    */
   this.origins_ = null;
-
-  if (origin instanceof ol.Coordinate) {
-    this.origin_ = origin;
-  } else if (goog.isArray(origin)) {
-    goog.asserts.assert(origin.length == this.numResolutions_);
-    this.origins_ = origin;
-  } else {
-    goog.asserts.assert(false);
+  if (goog.isDef(tileGridOptions.origins)) {
+    this.origins_ = tileGridOptions.origins;
+    goog.asserts.assert(this.origins_.length == this.resolutions_.length);
   }
 
   /**
    * @private
    * @type {ol.Size}
    */
-  this.tileSize_ = opt_tileSize || new ol.Size(256, 256);
+  this.tileSize_ = goog.isDef(tileGridOptions.tileSize) ?
+      tileGridOptions.tileSize : new ol.Size(256, 256);
 
 };
 
@@ -81,7 +87,7 @@ ol.TileGrid = function(resolutions, extent, origin, opt_tileSize) {
  * @param {T=} opt_obj Object.
  * @template T
  */
-ol.TileGrid.prototype.forEachTileCoordParentTileRange =
+ol.tilegrid.TileGrid.prototype.forEachTileCoordParentTileRange =
     function(tileCoord, callback, opt_obj) {
   var tileCoordExtent = this.getTileCoordExtent(tileCoord);
   var z = tileCoord.z - 1;
@@ -98,7 +104,7 @@ ol.TileGrid.prototype.forEachTileCoordParentTileRange =
 /**
  * @return {ol.Extent} Extent.
  */
-ol.TileGrid.prototype.getExtent = function() {
+ol.tilegrid.TileGrid.prototype.getExtent = function() {
   return this.extent_;
 };
 
@@ -107,7 +113,7 @@ ol.TileGrid.prototype.getExtent = function() {
  * @param {number} z Z.
  * @return {ol.Coordinate} Origin.
  */
-ol.TileGrid.prototype.getOrigin = function(z) {
+ol.tilegrid.TileGrid.prototype.getOrigin = function(z) {
   if (!goog.isNull(this.origin_)) {
     return this.origin_;
   } else {
@@ -123,8 +129,8 @@ ol.TileGrid.prototype.getOrigin = function(z) {
  * @param {number} resolution Resolution.
  * @return {ol.PixelBounds} Pixel bounds.
  */
-ol.TileGrid.prototype.getPixelBoundsForTileCoordAndResolution = function(
-    tileCoord, resolution) {
+ol.tilegrid.TileGrid.prototype.getPixelBoundsForTileCoordAndResolution =
+    function(tileCoord, resolution) {
   var scale = resolution / this.getResolution(tileCoord.z);
   var tileSize = this.getTileSize();
   tileSize = new ol.Size(tileSize.width / scale,
@@ -142,7 +148,7 @@ ol.TileGrid.prototype.getPixelBoundsForTileCoordAndResolution = function(
  * @param {number} z Z.
  * @return {number} Resolution.
  */
-ol.TileGrid.prototype.getResolution = function(z) {
+ol.tilegrid.TileGrid.prototype.getResolution = function(z) {
   goog.asserts.assert(0 <= z && z < this.numResolutions_);
   return this.resolutions_[z];
 };
@@ -151,7 +157,7 @@ ol.TileGrid.prototype.getResolution = function(z) {
 /**
  * @return {Array.<number>} Resolutions.
  */
-ol.TileGrid.prototype.getResolutions = function() {
+ol.tilegrid.TileGrid.prototype.getResolutions = function() {
   return this.resolutions_;
 };
 
@@ -161,7 +167,7 @@ ol.TileGrid.prototype.getResolutions = function() {
  * @param {ol.TileRange} tileRange Tile range.
  * @return {ol.Extent} Extent.
  */
-ol.TileGrid.prototype.getTileRangeExtent = function(z, tileRange) {
+ol.tilegrid.TileGrid.prototype.getTileRangeExtent = function(z, tileRange) {
   var origin = this.getOrigin(z);
   var resolution = this.getResolution(z);
   var tileSize = this.tileSize_;
@@ -178,7 +184,7 @@ ol.TileGrid.prototype.getTileRangeExtent = function(z, tileRange) {
  * @param {number} resolution Resolution.
  * @return {ol.TileRange} Tile range.
  */
-ol.TileGrid.prototype.getTileRangeForExtentAndResolution = function(
+ol.tilegrid.TileGrid.prototype.getTileRangeForExtentAndResolution = function(
     extent, resolution) {
   var min = this.getTileCoordForCoordAndResolution(
       new ol.Coordinate(extent.minX, extent.minY), resolution);
@@ -193,7 +199,7 @@ ol.TileGrid.prototype.getTileRangeForExtentAndResolution = function(
  * @param {number} z Z.
  * @return {ol.TileRange} Tile range.
  */
-ol.TileGrid.prototype.getTileRangeForExtentAndZ = function(extent, z) {
+ol.tilegrid.TileGrid.prototype.getTileRangeForExtentAndZ = function(extent, z) {
   var resolution = this.getResolution(z);
   return this.getTileRangeForExtentAndResolution(extent, resolution);
 };
@@ -203,7 +209,7 @@ ol.TileGrid.prototype.getTileRangeForExtentAndZ = function(extent, z) {
  * @param {ol.TileCoord} tileCoord Tile coordinate.
  * @return {ol.Coordinate} Tile center.
  */
-ol.TileGrid.prototype.getTileCoordCenter = function(tileCoord) {
+ol.tilegrid.TileGrid.prototype.getTileCoordCenter = function(tileCoord) {
   var origin = this.getOrigin(tileCoord.z);
   var resolution = this.getResolution(tileCoord.z);
   var tileSize = this.tileSize_;
@@ -217,7 +223,7 @@ ol.TileGrid.prototype.getTileCoordCenter = function(tileCoord) {
  * @param {ol.TileCoord} tileCoord Tile coordinate.
  * @return {ol.Extent} Extent.
  */
-ol.TileGrid.prototype.getTileCoordExtent = function(tileCoord) {
+ol.tilegrid.TileGrid.prototype.getTileCoordExtent = function(tileCoord) {
   var origin = this.getOrigin(tileCoord.z);
   var resolution = this.getResolution(tileCoord.z);
   var tileSize = this.tileSize_;
@@ -234,7 +240,7 @@ ol.TileGrid.prototype.getTileCoordExtent = function(tileCoord) {
  * @param {number} resolution Resolution.
  * @return {ol.TileCoord} Tile coordinate.
  */
-ol.TileGrid.prototype.getTileCoordForCoordAndResolution = function(
+ol.tilegrid.TileGrid.prototype.getTileCoordForCoordAndResolution = function(
     coordinate, resolution) {
   var z = this.getZForResolution(resolution);
   var scale = resolution / this.getResolution(z);
@@ -278,7 +284,8 @@ ol.TileGrid.prototype.getTileCoordForCoordAndResolution = function(
  * @param {number} z Z.
  * @return {ol.TileCoord} Tile coordinate.
  */
-ol.TileGrid.prototype.getTileCoordForCoordAndZ = function(coordinate, z) {
+ol.tilegrid.TileGrid.prototype.getTileCoordForCoordAndZ =
+    function(coordinate, z) {
   var resolution = this.getResolution(z);
   return this.getTileCoordForCoordAndResolution(coordinate, resolution);
 };
@@ -288,7 +295,7 @@ ol.TileGrid.prototype.getTileCoordForCoordAndZ = function(coordinate, z) {
  * @param {ol.TileCoord} tileCoord Tile coordinate.
  * @return {number} Tile resolution.
  */
-ol.TileGrid.prototype.getTileCoordResolution = function(tileCoord) {
+ol.tilegrid.TileGrid.prototype.getTileCoordResolution = function(tileCoord) {
   goog.asserts.assert(0 <= tileCoord.z && tileCoord.z < this.numResolutions_);
   return this.resolutions_[tileCoord.z];
 };
@@ -297,7 +304,7 @@ ol.TileGrid.prototype.getTileCoordResolution = function(tileCoord) {
 /**
  * @return {ol.Size} Tile size.
  */
-ol.TileGrid.prototype.getTileSize = function() {
+ol.tilegrid.TileGrid.prototype.getTileSize = function() {
   return this.tileSize_;
 };
 
@@ -306,6 +313,6 @@ ol.TileGrid.prototype.getTileSize = function() {
  * @param {number} resolution Resolution.
  * @return {number} Z.
  */
-ol.TileGrid.prototype.getZForResolution = function(resolution) {
+ol.tilegrid.TileGrid.prototype.getZForResolution = function(resolution) {
   return ol.array.linearFindNearest(this.resolutions_, resolution);
 };
diff --git a/src/ol/tilegrid/xyz.js b/src/ol/tilegrid/xyz.js
new file mode 100644
index 0000000000..a150e90e78
--- /dev/null
+++ b/src/ol/tilegrid/xyz.js
@@ -0,0 +1,64 @@
+goog.provide('ol.tilegrid.XYZ');
+goog.provide('ol.tilegrid.XYZOptions');
+
+goog.require('ol.Coordinate');
+goog.require('ol.Projection');
+goog.require('ol.Size');
+goog.require('ol.TileRange');
+goog.require('ol.tilegrid.TileGrid');
+
+
+/**
+ * @typedef {{maxZoom: number}}
+ */
+ol.tilegrid.XYZOptions;
+
+
+
+/**
+ * @constructor
+ * @extends {ol.tilegrid.TileGrid}
+ * @param {ol.tilegrid.XYZOptions} xyzOptions XYZ options.
+ */
+ol.tilegrid.XYZ = function(xyzOptions) {
+
+  var resolutions = new Array(xyzOptions.maxZoom + 1);
+  var z;
+  for (z = 0; z <= xyzOptions.maxZoom; ++z) {
+    resolutions[z] = ol.Projection.EPSG_3857_HALF_SIZE / (128 << z);
+  }
+
+  goog.base(this, {
+    extent: ol.Projection.EPSG_3857_EXTENT,
+    origin: new ol.Coordinate(-ol.Projection.EPSG_3857_HALF_SIZE,
+                              ol.Projection.EPSG_3857_HALF_SIZE),
+    resolutions: resolutions,
+    tileSize: new ol.Size(256, 256)
+  });
+
+};
+goog.inherits(ol.tilegrid.XYZ, ol.tilegrid.TileGrid);
+
+
+/**
+ * @inheritDoc
+ */
+ol.tilegrid.XYZ.prototype.forEachTileCoordParentTileRange =
+    function(tileCoord, callback, opt_obj) {
+  var x = tileCoord.x;
+  var y = tileCoord.y;
+  var z = tileCoord.z;
+  var tileRange;
+  while (true) {
+    z -= 1;
+    if (z < 0) {
+      break;
+    }
+    x = Math.floor(x / 2);
+    y = Math.floor(y / 2);
+    tileRange = new ol.TileRange(x, y, x, y);
+    if (callback.call(opt_obj, z, tileRange)) {
+      break;
+    }
+  }
+};
diff --git a/src/ol/tilesource.js b/src/ol/tilesource.js
deleted file mode 100644
index ed48bf8e6b..0000000000
--- a/src/ol/tilesource.js
+++ /dev/null
@@ -1,101 +0,0 @@
-goog.provide('ol.TileSource');
-
-goog.require('ol.Attribution');
-goog.require('ol.Source');
-goog.require('ol.Tile');
-goog.require('ol.TileCoord');
-goog.require('ol.TileGrid');
-goog.require('ol.TileUrlFunctionType');
-
-
-
-/**
- * @constructor
- * @extends {ol.Source}
- * @param {ol.Projection} projection Projection.
- * @param {ol.TileGrid} tileGrid Tile grid.
- * @param {ol.TileUrlFunctionType} tileUrlFunction Tile URL.
- * @param {ol.Extent=} opt_extent Extent.
- * @param {Array.<string>=} opt_attributions Attributions.
- * @param {?string=} opt_crossOrigin Cross origin.
- */
-ol.TileSource = function(projection, tileGrid, tileUrlFunction, opt_extent,
-    opt_attributions, opt_crossOrigin) {
-
-  goog.base(this, projection, opt_extent, opt_attributions);
-
-  /**
-   * @protected
-   * @type {ol.TileGrid}
-   */
-  this.tileGrid = tileGrid;
-
-  /**
-   * @protected
-   * @type {ol.TileUrlFunctionType}
-   */
-  this.tileUrlFunction = tileUrlFunction;
-
-  /**
-   * @private
-   * @type {?string}
-   */
-  this.crossOrigin_ = opt_crossOrigin || 'anonymous';
-
-  /**
-   * @private
-   * @type {Object.<string, ol.Tile>}
-   * FIXME will need to expire elements from this cache
-   * FIXME see elemoine's work with goog.structs.LinkedMap
-   */
-  this.tileCache_ = {};
-
-};
-goog.inherits(ol.TileSource, ol.Source);
-
-
-/**
- * @inheritDoc
- */
-ol.TileSource.prototype.getResolutions = function() {
-  return this.tileGrid.getResolutions();
-};
-
-
-/**
- * @param {ol.TileCoord} tileCoord Tile coordinate.
- * @return {ol.Tile} Tile.
- */
-ol.TileSource.prototype.getTile = function(tileCoord) {
-  var key = tileCoord.toString();
-  if (goog.object.containsKey(this.tileCache_, key)) {
-    return this.tileCache_[key];
-  } else {
-    var tileUrl = this.getTileCoordUrl(tileCoord);
-    var tile;
-    if (goog.isDef(tileUrl)) {
-      tile = new ol.Tile(tileCoord, tileUrl, this.crossOrigin_);
-    } else {
-      tile = null;
-    }
-    this.tileCache_[key] = tile;
-    return tile;
-  }
-};
-
-
-/**
- * @param {ol.TileCoord} tileCoord Tile coordinate.
- * @return {string|undefined} Tile URL.
- */
-ol.TileSource.prototype.getTileCoordUrl = function(tileCoord) {
-  return this.tileUrlFunction(tileCoord);
-};
-
-
-/**
- * @return {ol.TileGrid} Tile grid.
- */
-ol.TileSource.prototype.getTileGrid = function() {
-  return this.tileGrid;
-};
diff --git a/test/ol.html b/test/ol.html
index 90f2f0f9b8..83cd2f67c0 100644
--- a/test/ol.html
+++ b/test/ol.html
@@ -81,7 +81,8 @@
   <script type="text/javascript" src="spec/ol/tilerange.test.js"></script>
   <script type="text/javascript" src="spec/ol/tileurlfunction.test.js"></script>
   <script type="text/javascript" src="spec/ol/resolutionconstraint.test.js"></script>
-  <script type="text/javascript" src="spec/ol/layer/xyz.test.js"></script>
+  <script type="text/javascript" src="spec/ol/source/xyz.test.js"></script>
+  <script type="text/javascript" src="spec/ol/tilegrid/xyz.test.js"></script>
 
   <script type="text/javascript">
 
diff --git a/test/spec/ol/layer/xyz.test.js b/test/spec/ol/source/xyz.test.js
similarity index 96%
rename from test/spec/ol/layer/xyz.test.js
rename to test/spec/ol/source/xyz.test.js
index 879abf151e..2183623296 100644
--- a/test/spec/ol/layer/xyz.test.js
+++ b/test/spec/ol/source/xyz.test.js
@@ -5,8 +5,10 @@ describe('ol.source.XYZ', function() {
     var xyzTileSource, tileGrid;
 
     beforeEach(function() {
-      xyzTileSource = new ol.source.XYZ(
-          6, ol.TileUrlFunction.createFromTemplate('{z}/{x}/{y}'));
+      xyzTileSource = new ol.source.XYZ({
+        maxZoom: 6,
+        url: '{z}/{x}/{y}'
+      });
       tileGrid = xyzTileSource.getTileGrid();
     });
 
@@ -72,7 +74,7 @@ describe('ol.source.XYZ', function() {
 
   describe('forEachTileCoordParentTileRange', function() {
     it('iterates as expected', function() {
-      var xyzTileGrid = new ol.tilegrid.XYZ(6);
+      var xyzTileGrid = new ol.tilegrid.XYZ({maxZoom: 6});
 
       var tileCoord = new ol.TileCoord(5, 11, 21);
       var zs = [], tileRanges = [];
diff --git a/test/spec/ol/tilegrid.test.js b/test/spec/ol/tilegrid.test.js
index 092bd39be8..fa1dc3f889 100644
--- a/test/spec/ol/tilegrid.test.js
+++ b/test/spec/ol/tilegrid.test.js
@@ -1,4 +1,4 @@
-describe('ol.TileGrid', function() {
+describe('ol.tilegrid.TileGrid', function() {
   var extent;
   var resolutions;
   var origin;
@@ -16,16 +16,25 @@ describe('ol.TileGrid', function() {
   describe('create valid', function() {
     it('does not throw an exception', function() {
       expect(function() {
-        return new ol.TileGrid(resolutions, extent, origin, tileSize);
+        return new ol.tilegrid.TileGrid({
+          resolutions: resolutions,
+          extent: extent,
+          origin: origin,
+          tileSize: tileSize
+        });
       }).not.toThrow();
     });
   });
 
   describe('create with duplicate resolutions', function() {
     it('throws an exception', function() {
-      var resolutions = [100, 50, 50, 25, 10];
       expect(function() {
-        return new ol.TileGrid(resolutions, extent, origin, tileSize);
+        return new ol.tilegrid.TileGrid({
+          resolutions: [100, 50, 50, 25, 10],
+          extent: extent,
+          origin: origin,
+          tileSize: tileSize
+        });
       }).toThrow();
     });
   });
@@ -34,37 +43,51 @@ describe('ol.TileGrid', function() {
     it('throws an exception', function() {
       var resolutions = [100, 25, 50, 10];
       expect(function() {
-        return new ol.TileGrid(resolutions, extent, origin, tileSize);
+        return new ol.tilegrid.TileGrid({
+          resolutions: resolutions,
+          extent: extent,
+          origin: origin,
+          tileSize: tileSize
+        });
       }).toThrow();
     });
   });
 
   describe('create with multiple origins', function() {
     it('does not throw an exception', function() {
-      var resolutions = [100, 50, 25, 10];
-      var origins = [origin, origin, origin, origin];
       expect(function() {
-        return new ol.TileGrid(resolutions, extent, origins, tileSize);
+        return new ol.tilegrid.TileGrid({
+          resolutions: [100, 50, 25, 10],
+          extent: extent,
+          origins: [origin, origin, origin, origin],
+          tileSize: tileSize
+        });
       }).not.toThrow();
     });
   });
 
   describe('create with too few origins', function() {
     it('throws an exception', function() {
-      var resolutions = [100, 50, 25, 10];
-      var origins = [origin, origin, origin];
       expect(function() {
-        return new ol.TileGrid(resolutions, extent, origins, tileSize);
+        return new ol.tilegrid.TileGrid({
+          resolutions: [100, 50, 25, 10],
+          extent: extent,
+          origins: [origin, origin, origin],
+          tileSize: tileSize
+        });
       }).toThrow();
     });
   });
 
   describe('create with too many origins', function() {
     it('throws an exception', function() {
-      var resolutions = [100, 50, 25, 10];
-      var origins = [origin, origin, origin, origin, origin];
       expect(function() {
-        return new ol.TileGrid(resolutions, extent, origins, tileSize);
+        return new ol.tilegrid.TileGrid({
+          resolutions: [100, 50, 25, 10],
+          extent: extent,
+          origins: [origin, origin, origin, origin, origin],
+          tileSize: tileSize
+        });
       }).toThrow();
     });
   });
@@ -74,7 +97,12 @@ describe('ol.TileGrid', function() {
     describe('Y North, X East', function() {
       it('returns the expected TileCoord', function() {
         origin = new ol.Coordinate(0, 0);
-        var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
+        var tileGrid = new ol.tilegrid.TileGrid({
+          resolutions: resolutions,
+          extent: extent,
+          origin: origin,
+          tileSize: tileSize
+        });
         var tileCoord;
 
         tileCoord = tileGrid.getTileCoordForCoordAndZ(
@@ -106,7 +134,12 @@ describe('ol.TileGrid', function() {
     describe('Y South, X East', function() {
       it('returns the expected TileCoord', function() {
         origin = new ol.Coordinate(0, 100000);
-        var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
+        var tileGrid = new ol.tilegrid.TileGrid({
+          resolutions: resolutions,
+          extent: extent,
+          origin: origin,
+          tileSize: tileSize
+        });
         var tileCoord;
 
         tileCoord = tileGrid.getTileCoordForCoordAndZ(
@@ -139,7 +172,12 @@ describe('ol.TileGrid', function() {
   describe('getTileCoordForCoordAndResolution', function() {
     it('returns the expected TileCoord', function() {
       var tileSize = new ol.Size(256, 256);
-      var tileGrid = new ol.TileGrid([10], extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: [10],
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
 
       var coordinate;
       var tileCoord;
@@ -221,7 +259,12 @@ describe('ol.TileGrid', function() {
   describe('getTileCoordForCoordAndResolution fractional', function() {
     it('returns the expected TileCoord', function() {
       var tileSize = new ol.Size(256, 256);
-      var tileGrid = new ol.TileGrid([1 / 3], extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: [1 / 3],
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
 
       var coordinate;
       var tileCoord;
@@ -315,7 +358,12 @@ describe('ol.TileGrid', function() {
 
   describe('getTileCoordCenter', function() {
     it('returns the expected center', function() {
-      var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: resolutions,
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
       var center;
 
       center = tileGrid.getTileCoordCenter(new ol.TileCoord(0, 0, 0));
@@ -334,7 +382,12 @@ describe('ol.TileGrid', function() {
 
   describe('getTileCoordExent', function() {
     it('returns the expected extend', function() {
-      var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: resolutions,
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
       var tileCoordExtent;
 
       tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(0, 0, 0));
@@ -359,7 +412,12 @@ describe('ol.TileGrid', function() {
 
   describe('getTileRangeForExtentAndZ', function() {
     it('returns the expected TileRange', function() {
-      var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: resolutions,
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
       var e = new ol.Extent(45000, 5000, 55000, 15000);
       var tileRange;
 
@@ -391,7 +449,12 @@ describe('ol.TileGrid', function() {
 
   describe('forEachTileCoordParentTileRange', function() {
     it('iterates as expected', function() {
-      var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: resolutions,
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
       var zs = [], tileRanges = [];
 
       tileGrid.forEachTileCoordParentTileRange(
@@ -427,8 +490,12 @@ describe('ol.TileGrid', function() {
 
   describe('getZForResolution (exact)', function() {
     it('returns the expected z value', function() {
-      var tileGrid =
-          new ol.TileGrid(resolutions, extent, origin, tileSize);
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: resolutions,
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
 
       expect(tileGrid.getZForResolution(1000)).toEqual(0);
       expect(tileGrid.getZForResolution(500)).toEqual(1);
@@ -439,9 +506,12 @@ describe('ol.TileGrid', function() {
 
   describe('getZForResolution (approcimate)', function() {
     it('returns the expected z value', function() {
-      var tileGrid =
-          new ol.TileGrid(resolutions, extent, origin, tileSize);
-
+      var tileGrid = new ol.tilegrid.TileGrid({
+        resolutions: resolutions,
+        extent: extent,
+        origin: origin,
+        tileSize: tileSize
+      });
 
       expect(tileGrid.getZForResolution(2000)).toEqual(0);
       expect(tileGrid.getZForResolution(1000)).toEqual(0);
@@ -465,4 +535,4 @@ goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.Size');
 goog.require('ol.TileCoord');
-goog.require('ol.TileGrid');
+goog.require('ol.tilegrid.TileGrid');