From b4004d6e654286b543db6404a357b2b84c00658d Mon Sep 17 00:00:00 2001
From: Glen Mazza <gmazza@apache.org>
Date: Sun, 4 Jul 2004 05:15:38 +0000
Subject: [PATCH] validateChildNode() activated for fo:flow.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@197752 13f79535-47bb-0310-9956-ffa450edef68
---
 src/java/org/apache/fop/fo/FONode.java        |  2 +-
 .../org/apache/fop/fo/pagination/Flow.java    | 22 ++++++++++++++-----
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/src/java/org/apache/fop/fo/FONode.java b/src/java/org/apache/fop/fo/FONode.java
index a542706a5..16043c00e 100644
--- a/src/java/org/apache/fop/fo/FONode.java
+++ b/src/java/org/apache/fop/fo/FONode.java
@@ -258,7 +258,7 @@ public abstract class FONode {
     protected void nodesOutOfOrderError(Locator loc, String tooLateNode, 
         String tooEarlyNode) {
         throw new IllegalArgumentException(
-            errorText(loc) + getName() + ", " + tooLateNode 
+            errorText(loc) + "For " + getName() + ", " + tooLateNode 
             + " must be declared before " + tooEarlyNode + ".");
     }
     
diff --git a/src/java/org/apache/fop/fo/pagination/Flow.java b/src/java/org/apache/fop/fo/pagination/Flow.java
index 00b5ff7c9..6d8b7966d 100644
--- a/src/java/org/apache/fop/fo/pagination/Flow.java
+++ b/src/java/org/apache/fop/fo/pagination/Flow.java
@@ -28,6 +28,7 @@ import org.xml.sax.Locator;
 // FOP
 import org.apache.fop.fo.FONode;
 import org.apache.fop.fo.FObj;
+import org.apache.fop.fo.FOElementMapping;
 import org.apache.fop.fo.FOTreeVisitor;
 import org.apache.fop.apps.FOPException;
 
@@ -56,6 +57,11 @@ public class Flow extends FObj {
      */
     private int contentWidth;
 
+    /**
+     * Content-width of current column area during layout
+     */
+    private boolean blockItemFound = false;
+
     /**
      * @param parent FONode that is the parent of this object
      */
@@ -65,15 +71,19 @@ public class Flow extends FObj {
 
     /**
      * @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
-     * XSL/FOP Content Model: markers* (%block;)+
+     * XSL/FOP Content Model: marker* (%block;)+
      */
-/*  temporarily disabled:  need to account for fo-markers which may be initial children
      protected void validateChildNode(Locator loc, String nsURI, String localName) {
-        if (!isBlockItem(nsURI, localName)) {
+        if (nsURI == FOElementMapping.URI && localName.equals("marker")) {
+            if (blockItemFound) {
+               nodesOutOfOrderError(loc, "fo:marker", "(%block;)");
+            }
+        } else if (!isBlockItem(nsURI, localName)) {
             invalidChildError(loc, nsURI, localName);
+        } else {
+            blockItemFound = true;
         }
     }
-*/
 
     /**
      * Make sure content model satisfied, if so then tell the
@@ -81,8 +91,8 @@ public class Flow extends FObj {
      * @see org.apache.fop.fo.FONode#end
      */
     protected void end() {
-        if (children == null) {
-            missingChildElementError("(%block;)+");
+        if (!blockItemFound) {
+            missingChildElementError("marker* (%block;)+");
         }
         getFOInputHandler().endFlow(this);
     }
-- 
2.39.5