From 66f1826358de97e1a8a1af03fb661eecc2d7a86a Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Mon, 9 Dec 2013 11:30:28 +0000
Subject: [PATCH] Add ol.extent.closestSquaredDistanceXY

---
 src/ol/extent.js | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/ol/extent.js b/src/ol/extent.js
index b396d8c33d..762d26a3d0 100644
--- a/src/ol/extent.js
+++ b/src/ol/extent.js
@@ -84,6 +84,32 @@ ol.extent.clone = function(extent, opt_extent) {
 };
 
 
+/**
+ * @param {ol.Extent} extent Extent.
+ * @param {number} x X.
+ * @param {number} y Y.
+ * @return {number} Closest squared distance.
+ */
+ol.extent.closestSquaredDistanceXY = function(extent, x, y) {
+  var dx, dy;
+  if (x < extent[0]) {
+    dx = extent[0] - x;
+  } else if (extent[2] < x) {
+    dx = x - extent[2];
+  } else {
+    dx = 0;
+  }
+  if (y < extent[1]) {
+    dy = extent[1] - y;
+  } else if (extent[3] < y) {
+    dy = y - extent[3];
+  } else {
+    dy = 0;
+  }
+  return dx * dx + dy * dy;
+};
+
+
 /**
  * Checks if the passed coordinate is contained or on the edge of the extent.
  *