From 31af39e5bf4087f6f944b50c9263bf4402c0925f Mon Sep 17 00:00:00 2001
From: Jeremias Maerki <jeremias@apache.org>
Date: Mon, 11 Jul 2005 07:19:01 +0000
Subject: [PATCH] Bugfix: Corrected the calculation of the full length of the
 section to be broken. Could lead to strange results. Own private logger for
 easier debugging.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@210077 13f79535-47bb-0310-9956-ffa450edef68
---
 .../layoutmgr/BalancingColumnBreakingAlgorithm.java | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/java/org/apache/fop/layoutmgr/BalancingColumnBreakingAlgorithm.java b/src/java/org/apache/fop/layoutmgr/BalancingColumnBreakingAlgorithm.java
index 3a3c343c6..2178dee2d 100644
--- a/src/java/org/apache/fop/layoutmgr/BalancingColumnBreakingAlgorithm.java
+++ b/src/java/org/apache/fop/layoutmgr/BalancingColumnBreakingAlgorithm.java
@@ -18,6 +18,8 @@
 
 package org.apache.fop.layoutmgr;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.fop.traits.MinOptMax;
 
 /**
@@ -26,8 +28,11 @@ import org.apache.fop.traits.MinOptMax;
  */
 public class BalancingColumnBreakingAlgorithm extends PageBreakingAlgorithm {
 
+    private Log log = LogFactory.getLog(BalancingColumnBreakingAlgorithm.class);
+    
     private int columnCount;
     private int fullLen;
+    private int idealPartLen;
     
     public BalancingColumnBreakingAlgorithm(LayoutManager topLevelLM,
             PageSequenceLayoutManager.PageViewportProvider pvProvider,
@@ -47,12 +52,13 @@ public class BalancingColumnBreakingAlgorithm extends PageBreakingAlgorithm {
         double dem = super.computeDemerits(activeNode, element, fitnessClass, r);
         if (log.isTraceEnabled()) {
             log.trace("original demerit=" + dem + " " + totalWidth 
-                    + " line=" + activeNode.line);
+                    + " line=" + activeNode.line + "/" + columnCount);
         }
         int remParts = columnCount - activeNode.line;
         int curPos = par.indexOf(element);
         if (fullLen == 0) {
-            fullLen = ElementListUtils.calcContentLength(par);
+            fullLen = ElementListUtils.calcContentLength(par, activeNode.position, par.size() - 1);
+            this.idealPartLen = (fullLen / columnCount);
         }
         int partLen = ElementListUtils.calcContentLength(par, activeNode.position, curPos - 1);
         int restLen = ElementListUtils.calcContentLength(par, curPos - 1, par.size() - 1);
@@ -64,8 +70,7 @@ public class BalancingColumnBreakingAlgorithm extends PageBreakingAlgorithm {
             log.trace("remaining parts: " + remParts + " rest len: " + restLen 
                     + " avg=" + avgRestLen);
         }
-        int meanColumnLen = (fullLen / columnCount);
-        double balance = (meanColumnLen - partLen) / 1000f;
+        double balance = (idealPartLen - partLen) / 1000f;
         if (log.isTraceEnabled()) {
             log.trace("balance=" + balance);
         }
-- 
2.39.5