1 files changed, 126 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/fo/properties/BackgroundPositionShorthand.java b/src/java/org/apache/fop/fo/properties/BackgroundPositionShorthand.java
new file mode 100644
index 000000000..ba2ee7c60
--- /dev/null
+++ b/src/java/org/apache/fop/fo/properties/BackgroundPositionShorthand.java
@@ -0,0 +1,126 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.fo.properties;
+
+import java.util.List;
+
+import org.apache.fop.datatypes.PercentBase;
+import org.apache.fop.datatypes.PercentBaseContext;
+import org.apache.fop.fo.Constants;
+import org.apache.fop.fo.FObj;
+import org.apache.fop.fo.PropertyList;
+import org.apache.fop.fo.expr.PropertyException;
+
+/**
+ * Class encapsulating functionality for the <a href="http://www.w3.org/TR/xsl/#background-position>
+ * <code>background-position</code></a> shorthand.
+ */
+
+public class BackgroundPositionShorthand extends ListProperty {
+
+    /**
+     * Inner class for creating instances of this property
+     *
+     */
+    public static class Maker extends ListProperty.Maker {
+
+        /** {@inheritDoc} */
+        public Maker(int propId) {
+            super(propId);
+        }
+        
+        
+        /** 
+         * {@inheritDoc} 
+         * If only <code>background-position-horizontal</code> is
+         * specified, <code>background-position-vertical</code> is set
+         * to "50%".
+         */
+        public Property make(PropertyList propertyList, String value, FObj fo) throws PropertyException {
+            Property p = super.make(propertyList, value, fo);
+            if (p.getList().size() == 1) {
+                /* only background-position-horizontal specified 
+                 * through the shorthand, as a length or percentage:
+                 * background-position-vertical=50% (see: XSL-FO 1.1 -- 7.31.2)
+                 */
+                PropertyMaker m = FObj.getPropertyMakerFor(
+                                    Constants.PR_BACKGROUND_POSITION_VERTICAL);
+                p.getList().add(1, m.make(propertyList, "50%", fo));
+            }
+            return p;
+        }
+
+        /** 
+         * {@inheritDoc} 
+         * Returns a {@link org.apache.fop.datatypes.PercentBase} whose
+         * <code>getDimension()</code> returns 1.
+         */
+        public PercentBase getP‘rcentBase() {
+            return new PercentBase() {
+                /** {@inheritDoc} */
+                public int getBaseLength(PercentBaseContext context) throws PropertyException {
+                    return 0;
+                }
+
+                /** {@inheritDoc} */
+                public double getBaseValue() {
+                    return 0;
+                }
+
+                /** {@inheritDoc} */
+                public int getDimension() {
+                    return 1;
+                }
+                
+            };
+        }
+    }
+    
+    /**
+     * Inner class to provide shorthand parsing capabilities
+     *
+     */
+    public static class Parser extends GenericShorthandParser {
+
+        /** {@inheritDoc} */
+        public Property getValueForProperty(int propId,
+                                            Property property,
+                                            PropertyMaker maker,
+                                            PropertyList propertyList)
+                        throws PropertyException {
+            
+            int index = -1;
+            List propList = property.getList();
+            if (propId == Constants.PR_BACKGROUND_POSITION_HORIZONTAL) {
+                index = 0;
+            } else if (propId == Constants.PR_BACKGROUND_POSITION_VERTICAL) {
+                index = 1;
+            }
+            if (index >= 0) {
+                return maker.convertProperty(
+                        (Property) propList.get(index), 
+                        propertyList, 
+                        propertyList.getFObj());
+            } // else: invalid index? shouldn't happen...
+            return null;
+        }
+    }
+
+}