Close the first prototype of the new layout

mindplot/src/main/javascript/nlayout/Node.js

@@ -0,0 +1,117 @@
+mindplot.nlayout.Node = new Class({
+    initialize:function(id, size, position, sorter) {
+        $assert(!isNaN(id), "id can not be null");
+        $assert(size, "size can not be null");
+        $assert(position, "position can not be null");
+        $assert(sorter, "sorter can not be null");
+
+        this._id = id;
+        this._sorter = sorter;
+        this._properties = {};
+
+        this.setSize(size);
+        this.setPosition(position);
+    },
+
+    getId:function() {
+        return this._id;
+    },
+
+    setOrder: function(order) {
+        $assert(!isNaN(order), "Order can not be null");
+        this._setProperty('order', order, false);
+    },
+
+    resetPositionState : function() {
+        var prop = this._properties['position'];
+        if (prop) {
+            prop.hasChanded = false;
+        }
+    },
+
+    resetOrderState : function() {
+        var prop = this._properties['order'];
+        if (prop) {
+            prop.hasChanded = false;
+        }
+    },
+
+    getOrder: function() {
+        return this._getProperty('order');
+    },
+
+    hasOrderChanged: function() {
+        return this._isPropertyChanged('order');
+    },
+
+    hasPositionChanged: function() {
+        return this._isPropertyChanged('position');
+
+    },
+
+    getPosition: function() {
+        return this._getProperty('position');
+    },
+
+    setSize : function(size) {
+        $assert($defined(size), "Size can not be null");
+        this._setProperty('size', Object.clone(size));
+    },
+
+    getSize: function() {
+        return this._getProperty('size');
+    },
+
+    setPosition : function(position) {
+        $assert($defined(position), "Position can not be null");
+        $assert(!isNaN(position.x), "x can not be null");
+        $assert(!isNaN(position.y), "y can not be null");
+
+        this._setProperty('position', Object.clone(position));
+    },
+
+    _setProperty: function(key, value) {
+        var prop = this._properties[key];
+        if (!prop) {
+            prop = {
+                hasChanded:false,
+                value: null,
+                oldValue : null
+            };
+        }
+
+        prop.oldValue = prop.value;
+        prop.value = value;
+        prop.hasChanded = true;
+
+        this._properties[key] = prop;
+    },
+
+    _getProperty: function(key) {
+        var prop = this._properties[key];
+        return $defined(prop) ? prop.value : null;
+    },
+
+    _isPropertyChanged: function(key) {
+        var prop = this._properties[key];
+        return prop ? prop.hasChanded : false;
+    },
+
+    _setPropertyUpdated : function(key) {
+        var prop = this._properties[key];
+        if (prop) {
+            this._properties[key] = true;
+        }
+    },
+
+    getSorter: function() {
+        return this._sorter;
+    },
+
+
+    toString: function() {
+        return "[order:" + this.getOrder() + ", position: {" + this.getPosition().x + "," + this.getPosition().y + "}]";
+    }
+
+});
+