1 files changed, 94 insertions, 0 deletions
diff --git a/vendor/assets/javascripts/coordinates.js b/vendor/assets/javascripts/coordinates.js
new file mode 100644
index 0000000..e2f5bf2
--- /dev/null
+++ b/vendor/assets/javascripts/coordinates.js
@@ -0,0 +1,94 @@
+var Coordinates = {
+	ORIGIN : new Coordinate(0, 0),
+
+	northwestPosition : function(element) {
+		var x = parseInt(element.style.left);
+		var y = parseInt(element.style.top);
+
+		return new Coordinate(isNaN(x) ? 0 : x, isNaN(y) ? 0 : y);
+	},
+
+	southeastPosition : function(element) {
+		return Coordinates.northwestPosition(element).plus(
+				new Coordinate(element.offsetWidth, element.offsetHeight));
+	},
+
+	northwestOffset : function(element, isRecursive) {
+		var offset = new Coordinate(element.offsetLeft, element.offsetTop);
+
+		if (!isRecursive) return offset;
+
+		var parent = element.offsetParent;
+		while (parent) {
+			offset = offset.plus(
+					new Coordinate(parent.offsetLeft, parent.offsetTop));
+			parent = parent.offsetParent;
+		}
+		return offset;
+	},
+
+	southeastOffset : function(element, isRecursive) {
+		return Coordinates.northwestOffset(element, isRecursive).plus(
+				new Coordinate(element.offsetWidth, element.offsetHeight));
+	},
+
+	fixEvent : function(event) {
+		event.windowCoordinate = new Coordinate(event.clientX, event.clientY);
+	}
+};
+
+function Coordinate(x, y) {
+	this.x = x;
+	this.y = y;
+}
+
+Coordinate.prototype.toString = function() {
+	return "(" + this.x + "," + this.y + ")";
+}
+
+Coordinate.prototype.plus = function(that) {
+	return new Coordinate(this.x + that.x, this.y + that.y);
+}
+
+Coordinate.prototype.minus = function(that) {
+	return new Coordinate(this.x - that.x, this.y - that.y);
+}
+
+Coordinate.prototype.distance = function(that) {
+	var deltaX = this.x - that.x;
+	var deltaY = this.y - that.y;
+
+	return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));
+}
+
+Coordinate.prototype.max = function(that) {
+	var x = Math.max(this.x, that.x);
+	var y = Math.max(this.y, that.y);
+	return new Coordinate(x, y);
+}
+
+Coordinate.prototype.constrain = function(min, max) {
+	if (min.x > max.x || min.y > max.y) return this;
+
+	var x = this.x;
+	var y = this.y;
+
+	if (min.x != null) x = Math.max(x, min.x);
+	if (max.x != null) x = Math.min(x, max.x);
+	if (min.y != null) y = Math.max(y, min.y);
+	if (max.y != null) y = Math.min(y, max.y);
+
+	return new Coordinate(x, y);
+}
+
+Coordinate.prototype.reposition = function(element) {
+	element.style["top"] = this.y + "px";
+	element.style["left"] = this.x + "px";
+}
+
+Coordinate.prototype.equals = function(that) {
+	if (this == that) return true;
+	if (!that || that == null) return false;
+
+	return this.x == that.x && this.y == that.y;
+}