From 227f3bae18bdd0b382009e0de3dc9303a9f64474 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Lemoine?= <eric.lemoine@gmail.com>
Date: Wed, 17 Sep 2014 09:13:12 +0200
Subject: [PATCH] Add ol.source.Vector#forEachFeatureIntersectingExtent

---
 src/ol/source/vectorsource.js | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/src/ol/source/vectorsource.js b/src/ol/source/vectorsource.js
index e82ade9da9..7720f746c0 100644
--- a/src/ol/source/vectorsource.js
+++ b/src/ol/source/vectorsource.js
@@ -247,6 +247,39 @@ ol.source.Vector.prototype.forEachFeatureInExtentAtResolution =
 };
 
 
+/**
+ * This function executes the `callback` function once for each feature
+ * intersecting the `extent` until `callback` returns a truthy value. When
+ * `callback` returns a truthy value the function immediately returns that
+ * value. Otherwise the function returns `undefined`.
+ * @param {ol.Extent} extent Extent.
+ * @param {function(this: T, ol.Feature): S} f Callback.
+ * @param {T=} opt_this The object to use as `this` in `f`.
+ * @return {S|undefined}
+ * @template T,S
+ * @api
+ */
+ol.source.Vector.prototype.forEachFeatureIntersectingExtent =
+    function(extent, f, opt_this) {
+  return this.forEachFeatureInExtent(extent,
+      /**
+       * @param {ol.Feature} feature Feature.
+       * @return {S|undefined}
+       * @template S
+       */
+      function(feature) {
+        var geometry = feature.getGeometry();
+        goog.asserts.assert(goog.isDefAndNotNull(geometry));
+        if (geometry.intersectsExtent(extent)) {
+          var result = f.call(opt_this, feature);
+          if (result) {
+            return result;
+          }
+        }
+      });
+};
+
+
 /**
  * @return {Array.<ol.Feature>} Features.
  * @api stable