From 9ff780f79dafdfbd0a25d2dbb7721bb049ae9663 Mon Sep 17 00:00:00 2001
From: "Andreas L. Delmelle" <adelmelle@apache.org>
Date: Fri, 29 Aug 2008 20:12:34 +0000
Subject: [PATCH] Bugzilla 45667: avoid NullPointerExceptions during
 hyphenation for empty inlines.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@690382 13f79535-47bb-0310-9956-ffa450edef68
---
 .../inline/InlineStackingLayoutManager.java   |  3 +-
 status.xml                                    |  4 ++
 .../empty-inline_hyphenation_bug45667.xml     | 49 +++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 test/layoutengine/hyphenation-testcases/empty-inline_hyphenation_bug45667.xml

diff --git a/src/java/org/apache/fop/layoutmgr/inline/InlineStackingLayoutManager.java b/src/java/org/apache/fop/layoutmgr/inline/InlineStackingLayoutManager.java
index a27fc6516..963b98b37 100644
--- a/src/java/org/apache/fop/layoutmgr/inline/InlineStackingLayoutManager.java
+++ b/src/java/org/apache/fop/layoutmgr/inline/InlineStackingLayoutManager.java
@@ -334,7 +334,8 @@ public abstract class InlineStackingLayoutManager extends AbstractLayoutManager
                     fromIndex = oldListIterator.previousIndex();
                 } else if (currLM == prevLM) {
                     bSomethingChanged
-                        = prevLM.applyChanges(oldList.subList(fromIndex, oldList.size()))
+                        = (prevLM != null)
+                            && prevLM.applyChanges(oldList.subList(fromIndex, oldList.size()))
                             || bSomethingChanged;
                 } else {
                     bSomethingChanged
diff --git a/status.xml b/status.xml
index c5d699725..42d606538 100644
--- a/status.xml
+++ b/status.xml
@@ -53,6 +53,10 @@
 
   <changes>
     <release version="FOP Trunk" date="TBD">
+      <action context="Code" dev="AD" type="fix" fixes-bug="45667">
+        Quick-fix to avoid a possible NullPointerException when using
+        empty inlines and hyphenation.
+      </action>
       <action context="Layout" dev="JM" type="add">
         Added missing generation of areas for empty grid units in tables with collapsing border
         model.
diff --git a/test/layoutengine/hyphenation-testcases/empty-inline_hyphenation_bug45667.xml b/test/layoutengine/hyphenation-testcases/empty-inline_hyphenation_bug45667.xml
new file mode 100644
index 000000000..c66b10de9
--- /dev/null
+++ b/test/layoutengine/hyphenation-testcases/empty-inline_hyphenation_bug45667.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<!-- $Id$ -->
+<testcase>
+  <info>
+    <p>
+      This test checks for Bugzilla 45667: NPE thrown by an empty inline 
+      in combination with hyphenate="true".
+    </p>
+  </info>
+  <fo>
+    <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
+      <fo:layout-master-set>
+        <fo:simple-page-master master-name="LetterPage" page-width="6in"
+                                  page-height="3in">
+            <fo:region-body region-name="PageBody" margin="0.7in"
+                               background-color="rgb(245,245,245)"/>
+        </fo:simple-page-master>
+      </fo:layout-master-set>
+      <fo:page-sequence master-reference="LetterPage" xml:lang="en-US" hyphenate="true">
+        <fo:flow flow-name="PageBody">
+            <fo:block font="12pt sans-serif">
+                <!-- the following line caused a NullPointerException, 
+                     if hyphenate="true" -->
+                <fo:inline id="document.general.efficiently.dictionary"/>
+                <!-- the following line is working fine -->
+                Some <fo:inline font-weight="bold" color="red">inline text</fo:inline> formatting.
+            </fo:block>
+          </fo:flow>
+      </fo:page-sequence>
+    </fo:root>
+  </fo>
+  <checks /> <!-- only basic checks to see if no NPE occurred -->
+</testcase>
-- 
2.39.5