State and parameter checking.

Update the BPD from the child, too.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/inlineblock@231253 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 9 insertions, 3 deletions

diff --git a/src/java/org/apache/fop/area/inline/InlineBlockParent.java b/src/java/org/apache/fop/area/inline/InlineBlockParent.java
index 0c284e7ff..9934b1316 100644
--- a/src/java/org/apache/fop/area/inline/InlineBlockParent.java
+++ b/src/java/org/apache/fop/area/inline/InlineBlockParent.java
@@ -45,11 +45,17 @@ public class InlineBlockParent extends InlineArea {
      * @param childArea the child area to add
      */
     public void addChildArea(Area childArea) {
-        if (childArea instanceof Block && child == null) {
+        if (child != null) {
+            throw new IllegalStateException("InlineBlockParent may have only one child area.");
+        }
+        if (childArea instanceof Block) {
             child = (Block) childArea;
-            increaseIPD(childArea.getAllocIPD());
+            //Update extents from the child
+            setIPD(childArea.getAllocIPD());
+            setBPD(childArea.getAllocBPD());
         } else {
-            // TODO: log error, raise exception?
+            throw new IllegalArgumentException("The child of an InlineBlockParent must be a"
+                    + " Block area");
         }
     }