From a95e9b9c8b7d3a5da7d2c8c656edbc5225be47d8 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Wed, 3 Oct 2012 18:51:33 +0200
Subject: [PATCH] Avoid unecessary style changes in attribution control

---
 src/ol/control/attribution.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/ol/control/attribution.js b/src/ol/control/attribution.js
index 872ad7d921..0b37ab071c 100644
--- a/src/ol/control/attribution.js
+++ b/src/ol/control/attribution.js
@@ -143,7 +143,9 @@ ol.control.Attribution.prototype.createAttributionElementsForLayer_ =
         !layerVisible ||
         goog.isNull(attributionVisibilities) ||
         !attributionVisibilities[attributionKey]) {
-      goog.style.showElement(attributionElement, false);
+      if (goog.style.isElementShown(attributionElement)) {
+        goog.style.showElement(attributionElement, false);
+      }
     }
 
     goog.dom.appendChild(this.ulElement_, attributionElement);
@@ -400,7 +402,10 @@ ol.control.Attribution.prototype.updateLayerAttributionsVisibility_ =
         attributionVisibilities,
         function(attributionVisible, attributionKey) {
           var attributionElement = this.attributionElements_[attributionKey];
-          goog.style.showElement(attributionElement, attributionVisible);
+          if (goog.style.isElementShown(attributionElement) !=
+              attributionVisible) {
+            goog.style.showElement(attributionElement, attributionVisible);
+          }
         },
         this);
   } else {