initial port of @tschaub DOM renderer

src/ol/dom/layerrenderer.js

@@ -0,0 +1,56 @@
+goog.provide('ol.dom.LayerRenderer');
+
+goog.require('ol.LayerRenderer');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.LayerRenderer}
+ * @param {ol.dom.Map} map Map.
+ * @param {ol.Layer} layer Layer.
+ * @param {!Element} target Target.
+ */
+ol.dom.LayerRenderer = function(map, layer, target) {
+  goog.base(this, map, layer);
+
+  /**
+   * @type {!Element}
+   * @protected
+   */
+  this.target = target;
+
+  /**
+   * Location of the top-left corner of the renderer container in map coords.
+   *
+   * @type {goog.math.Coordinate}
+   * @protected
+   */
+  this.containerOrigin = null;
+
+};
+goog.inherits(ol.dom.LayerRenderer, ol.LayerRenderer);
+
+
+/**
+ * @override
+ * @return {ol.dom.Map} Map.
+ */
+ol.dom.LayerRenderer.prototype.getMap = function() {
+  return /** @type {ol.dom.Map} */ (goog.base(this, 'getMap'));
+};
+
+
+/**
+ * Set the location of the top-left corner of the renderer container.
+ *
+ * @param {goog.math.Coordinate} origin The container origin.
+ */
+ol.dom.LayerRenderer.prototype.setContainerOrigin = function(origin) {
+  this.containerOrigin = origin;
+};
+
+
+/**
+ */
+ol.dom.LayerRenderer.prototype.redraw = goog.abstractMethod;