preparing to generalize basic collission detection...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

grid-n-view.js

@@ -165,6 +165,9 @@ function(evt, id){
 // XXX constrain this to:
 // 		viewport -- DONE but needs to be smoother...
 // 		parent
+// 		element
+// 		...might be a good idea to write a fast/generic containment 
+// 		tester...
 // XXX might be a good idea to allow bounds to be:
 // 		string		- css selector
 // 		element		- 
@@ -350,6 +353,37 @@ function(options={}){
 	document.addEventListener('mouseup', handleMoveEnd) }
 
 
+// 	cmpRects(<rect>, <rect>)
+// 		-> 'contained'
+// 		-> 'contains'
+// 		-> 'intersect'
+// 		-> 'appart'
+// XXX should these pe separate checks -- speed???
+var cmpRects = function(rect, container){
+	// XXX
+}
+var Containment = function(elem, parent){
+	return Object.assign(
+		this instanceof Containment ?
+			obj
+			: { __proto__: Containment.prototype },
+		{
+			elem,
+			parent,
+		}) }
+Containment.prototype = {
+	// update rectangle data...
+	update: function(){
+		// XXX
+		return self },
+	check: function(){
+		// XXX
+	},
+}
+
+
+
+
 //---------------------------------------------------------------------
 
 // XXX add shift+arrow to select...