modules/controls/src/main/java/com/sun/javafx/scene/control/skin/TextAreaSkin.java

rev 9047 : RT-36454: [Modena, TextArea] Vertical scrollbar appears in TextArea and then disappears

*** 1,7 ****
  /*
!  * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 351,360 ****
--- 351,375 ----
                                          || scrollPane.getPrefViewportHeight() > 0) {
                      // Force layout of viewRect in ScrollPaneSkin
                      getParent().requestLayout();
                  }
              }
+ 
+             // RT-36454: Fit to width/height only if smaller than viewport.
+             // That is, grow to fit but don't shrink to fit.
+             Bounds viewportBounds = scrollPane.getViewportBounds();
+             boolean wasFitToWidth = scrollPane.isFitToWidth();
+             boolean wasFitToHeight = scrollPane.isFitToHeight();
+             boolean setFitToWidth = textArea.isWrapText() || computePrefWidth(-1) <= viewportBounds.getWidth();
+             boolean setFitToHeight = computePrefHeight(width) <= viewportBounds.getHeight();
+             if (wasFitToWidth != setFitToWidth || wasFitToHeight != setFitToHeight) {
+                 Platform.runLater(() -> {
+                     scrollPane.setFitToWidth(setFitToWidth);
+                     scrollPane.setFitToHeight(setFitToHeight);
+                 });
+                 getParent().requestLayout();
+             }
          }
      }
  
      private ContentView contentView = new ContentView();
      private Group paragraphNodes = new Group();