From e6a2d4b2355208b91f7ccf438cfd8aa268e619ae Mon Sep 17 00:00:00 2001
From: John Leonard <jellyedwards@hotmail.com>
Date: Mon, 9 Mar 2020 18:36:12 +0000
Subject: [PATCH] fix: handle layer clear event in case clear(true) called and
 individual delete feature events aren't generated

---
 src/ol/renderer/webgl/PointsLayer.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/ol/renderer/webgl/PointsLayer.js b/src/ol/renderer/webgl/PointsLayer.js
index d6da17801d..b35e3831b7 100644
--- a/src/ol/renderer/webgl/PointsLayer.js
+++ b/src/ol/renderer/webgl/PointsLayer.js
@@ -290,7 +290,8 @@ class WebGLPointsLayerRenderer extends WebGLLayerRenderer {
     this.sourceListenKeys_ = [
       listen(source, VectorEventType.ADDFEATURE, this.handleSourceFeatureAdded_, this),
       listen(source, VectorEventType.CHANGEFEATURE, this.handleSourceFeatureChanged_, this),
-      listen(source, VectorEventType.REMOVEFEATURE, this.handleSourceFeatureDelete_, this)
+      listen(source, VectorEventType.REMOVEFEATURE, this.handleSourceFeatureDelete_, this),
+      listen(source, VectorEventType.CLEAR, this.handleSourceFeatureClear_, this)
     ];
     source.forEachFeature(function(feature) {
       this.featureCache_[getUid(feature)] = {
@@ -339,6 +340,14 @@ class WebGLPointsLayerRenderer extends WebGLLayerRenderer {
     this.featureCount_--;
   }
 
+  /**
+   * @private
+   */
+  handleSourceFeatureClear_() {
+    this.featureCache_ = {};
+    this.featureCount_ = 0;
+  }
+
   /**
    * @inheritDoc
    */