checking in split files in preparation for new Ruby build

src/Layer.js

@@ -0,0 +1,78 @@
+///////////////////////////////////////////////////////////////////////
+//  Layer
+///////////////////////////////////////////////////////////////////////
+/**
+ * Layer constructor.  Layers are tied to their own canvas element and are used
+ * to contain groups or shapes
+ * @constructor
+ * @augments Kinetic.Container
+ * @augments Kinetic.Node
+ * @param {Object} config
+ */
+Kinetic.Layer = function(config) {
+    this.className = "Layer";
+    this.canvas = document.createElement('canvas');
+    this.context = this.canvas.getContext('2d');
+    this.canvas.style.position = 'absolute';
+
+    // call super constructors
+    Kinetic.Container.apply(this, []);
+    Kinetic.Node.apply(this, [config]);
+};
+/*
+ * Layer methods
+ */
+Kinetic.Layer.prototype = {
+    /**
+     * public draw children
+     */
+    draw: function() {
+        this._draw();
+    },
+    /**
+     * clear layer
+     */
+    clear: function() {
+        var context = this.getContext();
+        var canvas = this.getCanvas();
+        context.clearRect(0, 0, canvas.width, canvas.height);
+    },
+    /**
+     * get layer canvas
+     */
+    getCanvas: function() {
+        return this.canvas;
+    },
+    /**
+     * get layer context
+     */
+    getContext: function() {
+        return this.context;
+    },
+    /**
+     * add node to layer
+     * @param {Node} node
+     */
+    add: function(child) {
+        this._add(child);
+    },
+    /**
+     * remove a child from the layer
+     * @param {Node} child
+     */
+    remove: function(child) {
+        this._remove(child);
+    },
+    /**
+     * private draw children
+     */
+    _draw: function() {
+        this.clear();
+        if(this.visible) {
+            this._drawChildren();
+        }
+    }
+};
+// Extend Container and Node
+Kinetic.GlobalObject.extend(Kinetic.Layer, Kinetic.Container);
+Kinetic.GlobalObject.extend(Kinetic.Layer, Kinetic.Node);