From 7abfc1a0a7b1b85366468cb2b41f4469eb1b830b Mon Sep 17 00:00:00 2001
From: Jeremias Maerki <jeremias@apache.org>
Date: Fri, 11 Mar 2005 13:33:32 +0000
Subject: [PATCH] SpacePropertyMaker to handle conditionality as defined by the
 spec: "The .conditionality component of any space-before or space-after
 determined from a margin property is set to "retain"."

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@198480 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/fop/fo/FOPropertyMapping.java  | 12 +++--
 .../fop/fo/properties/SpacePropertyMaker.java | 49 +++++++++++++++++++
 2 files changed, 57 insertions(+), 4 deletions(-)
 create mode 100644 src/java/org/apache/fop/fo/properties/SpacePropertyMaker.java

diff --git a/src/java/org/apache/fop/fo/FOPropertyMapping.java b/src/java/org/apache/fop/fo/FOPropertyMapping.java
index b7ebace99..a1328b9bf 100644
--- a/src/java/org/apache/fop/fo/FOPropertyMapping.java
+++ b/src/java/org/apache/fop/fo/FOPropertyMapping.java
@@ -45,6 +45,7 @@ import org.apache.fop.fo.properties.PositionShorthandParser;
 import org.apache.fop.fo.properties.Property;
 import org.apache.fop.fo.properties.PropertyMaker;
 import org.apache.fop.fo.properties.SpaceProperty;
+import org.apache.fop.fo.properties.SpacePropertyMaker;
 import org.apache.fop.fo.properties.SpacingPropertyMaker;
 import org.apache.fop.fo.properties.StringProperty;
 import org.apache.fop.fo.properties.TextDecorationProperty;
@@ -52,7 +53,9 @@ import org.apache.fop.fo.properties.ToBeImplementedProperty;
 
 /**
  * This class creates and returns an array of Property.Maker instances
- * indexed by the PR_* propId from Constants.java. 
+ * indexed by the PR_* propId from Constants.java.
+ * 
+ * @todo Check multi-threading safety of the statics below 
  */
 public class FOPropertyMapping implements Constants {
     private static Map s_htPropNames = new HashMap();
@@ -383,8 +386,9 @@ public class FOPropertyMapping implements Constants {
     }
     
     /**
-     * Return a (possible cached) enum property based in the enum value.
+     * Return a (possibly cached) enum property based in the enum value.
      * @param enum A enum value from Constants.java.
+     * @param text the text value by which this enum property is known
      * @return An EnumProperty instance.
      */
     private Property getEnumProperty(int enumValue, String text) {
@@ -1216,7 +1220,7 @@ public class FOPropertyMapping implements Constants {
         // space-before
         m  = new SpaceProperty.Maker(PR_SPACE_BEFORE);
         m.useGeneric(genericSpace);
-        corr = new CorrespondingPropertyMaker(m);
+        corr = new SpacePropertyMaker(m);
         corr.setCorresponding(PR_MARGIN_TOP, PR_MARGIN_TOP, PR_MARGIN_RIGHT);
         corr.setUseParent(true);
         corr.setRelative(true);
@@ -1225,7 +1229,7 @@ public class FOPropertyMapping implements Constants {
         // space-after
         m  = new SpaceProperty.Maker(PR_SPACE_AFTER);
         m.useGeneric(genericSpace);
-        corr = new CorrespondingPropertyMaker(m);
+        corr = new SpacePropertyMaker(m);
         corr.setCorresponding(PR_MARGIN_BOTTOM, PR_MARGIN_BOTTOM, PR_MARGIN_LEFT);
         corr.setUseParent(true);
         corr.setRelative(true);
diff --git a/src/java/org/apache/fop/fo/properties/SpacePropertyMaker.java b/src/java/org/apache/fop/fo/properties/SpacePropertyMaker.java
new file mode 100644
index 000000000..9cc79f261
--- /dev/null
+++ b/src/java/org/apache/fop/fo/properties/SpacePropertyMaker.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2005 The Apache Software Foundation.
+ *
+ * Licensed 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.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.fo.properties;
+
+import org.apache.fop.fo.Constants;
+import org.apache.fop.fo.PropertyList;
+import org.apache.fop.fo.expr.PropertyException;
+
+/**
+ * Special CorrespondingPropertyMaker that sets the conditionality subproperty
+ * correctly for space-* properties.
+ */
+public class SpacePropertyMaker extends CorrespondingPropertyMaker {
+
+    /**
+     * @param baseMaker base property maker
+     */
+    public SpacePropertyMaker(PropertyMaker baseMaker) {
+        super(baseMaker);
+    }
+
+    /**
+     * @see org.apache.fop.fo.properties.CorrespondingPropertyMaker#compute(org.apache.fop.fo.PropertyList)
+     */
+    public Property compute(PropertyList propertyList) throws PropertyException {
+        Property prop = super.compute(propertyList);
+        if (prop != null && prop instanceof SpaceProperty) {
+            ((SpaceProperty)prop).setConditionality(
+                    new EnumProperty(Constants.EN_RETAIN, "RETAIN"), false);
+        }
+        return prop;
+    }
+}
-- 
2.39.5