[FIXED JENKINS-11307] "Tailing" the console of an active job broken in 1.434

changelog.html

@@ -61,6 +61,9 @@ Upcoming changes</a>
   <li class=bug>
     Avoid overwriting the repository definitions.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-11229">issue 11229</a>)
+  <li class=bug>
+    "Tailing" the console of an active job broken in 1.434
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-11307">issue 11307</a>)
   <li class=rfe>
     Improved the classloading performance
 </ul>

war/src/main/webapp/scripts/hudson-behavior.js

@@ -1370,7 +1370,8 @@ function AutoScroller(scrollContainer) {
             // the element height.
             //var height = ((scrollDiv.style.pixelHeight) ? scrollDiv.style.pixelHeight : scrollDiv.offsetHeight);
             var height = getViewportHeight();
-            var diff = currentHeight - scrollDiv.scrollTop - height;
+            var scrollPos = Math.max(scrollDiv.scrollTop, document.documentElement.scrollTop);
+            var diff = currentHeight - scrollPos - height;
             // window.alert("currentHeight=" + currentHeight + ",scrollTop=" + scrollDiv.scrollTop + ",height=" + height);
 
             return diff < this.bottomThreshold;
@@ -1378,7 +1379,9 @@ function AutoScroller(scrollContainer) {
 
         scrollToBottom : function() {
             var scrollDiv = $(this.scrollContainer);
-            scrollDiv.scrollTop = this.getCurrentHeight();
+            var currentHeight = this.getCurrentHeight();
+            if(document.documentElement) document.documentElement.scrollTop = currentHeight
+            scrollDiv.scrollTop = currentHeight;
         }
     };
 }