FOP-2301: Enable support for PDF sub-page transitions.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1537948 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 146 insertions, 0 deletions

diff --git a/src/java/org/apache/fop/render/pdf/extensions/PDFCollectionEntryElement.java b/src/java/org/apache/fop/render/pdf/extensions/PDFCollectionEntryElement.java
new file mode 100644
index 000000000..4185ceef0
--- /dev/null
+++ b/src/java/org/apache/fop/render/pdf/extensions/PDFCollectionEntryElement.java
@@ -0,0 +1,146 @@
+/*
+ * 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.render.pdf.extensions;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.Locator;
+
+import org.apache.fop.apps.FOPException;
+import org.apache.fop.fo.FONode;
+import org.apache.fop.fo.PropertyList;
+
+// CSOFF: LineLengthCheck
+
+/**
+ * Extension element for collection entries: pdf:{array,boolean,dictionary,name,number,reference,string}. The specific type
+ * of entry is established at construction type.
+ */
+public class PDFCollectionEntryElement extends AbstractPDFExtensionElement {
+
+    public static final String ATT_KEY = PDFCollectionEntryExtension.PROPERTY_KEY;
+
+    private PDFCollectionEntryExtension extension;
+    private StringBuffer characters;
+
+    PDFCollectionEntryElement(FONode parent, PDFObjectType type, PDFCollectionEntryExtension extension) {
+        super(parent);
+        this.extension = extension;
+    }
+
+    PDFCollectionEntryElement(FONode parent, PDFObjectType type) {
+        this(parent, type, createExtension(type));
+    }
+
+    private static PDFCollectionEntryExtension createExtension(PDFObjectType type) {
+        if (type == PDFObjectType.Reference) {
+            return new PDFReferenceExtension();
+        } else {
+            return new PDFCollectionEntryExtension(type);
+        }
+    }
+
+    public PDFCollectionEntryExtension getExtension() {
+        return extension;
+    }
+
+    @Override
+    public void processNode(String elementName, Locator locator, Attributes attlist, PropertyList propertyList) throws FOPException {
+        if (parent instanceof PDFDictionaryElement) {
+            String key = attlist.getValue(ATT_KEY);
+            if (key == null) {
+                missingPropertyError(ATT_KEY);
+            } else if (key.length() == 0) {
+                invalidPropertyValueError(ATT_KEY, key, null);
+            } else {
+                extension.setKey(key);
+            }
+        }
+    }
+
+    @Override
+    public void startOfNode() throws FOPException {
+        super.startOfNode();
+        if (parent instanceof PDFDictionaryElement) {
+            if (!PDFDictionaryType.hasValueOfElementName(parent.getLocalName())) {
+                invalidChildError(getLocator(), parent.getName(), getNamespaceURI(), getName(), null);
+            }
+        }
+    }
+
+    @Override
+    protected void characters(char[] data, int start, int length, PropertyList pList, Locator locator) throws FOPException {
+        if (capturePCData(extension.getType())) {
+            if (characters == null) {
+                characters = new StringBuffer((length < 16) ? 16 : length);
+            }
+            characters.append(data, start, length);
+        }
+    }
+
+    private boolean capturePCData(PDFObjectType type) {
+        if (type == PDFObjectType.Array) {
+            return false;
+        } else if (type == PDFObjectType.Dictionary) {
+            return false;
+        } else {
+            return (type != PDFObjectType.Reference);
+        }
+    }
+
+    @Override
+    public void endOfNode() throws FOPException {
+        if (capturePCData(extension.getType())) {
+            if (extension.getType() == PDFObjectType.Boolean) {
+                String value = (characters != null) ? characters.toString() : "";
+                if (!value.equals("true") && !value.equals("false")) {
+                    invalidPropertyValueError("<value>", value, null);
+                }
+                extension.setValue(Boolean.valueOf(value));
+            } else if (extension.getType() == PDFObjectType.Name) {
+                String value = (characters != null) ? characters.toString() : "";
+                if (value.length() == 0) {
+                    invalidPropertyValueError("<value>", value, null);
+                }
+                extension.setValue(value);
+            } else if (extension.getType() == PDFObjectType.Number) {
+                String value = (characters != null) ? characters.toString() : "";
+                try {
+                    double d = Double.parseDouble(value);
+                    if (Math.abs(Math.floor(d) - d) < 1E-10) {
+                        extension.setValue(Long.valueOf((long) d));
+                    } else {
+                        extension.setValue(Double.valueOf(d));
+                    }
+                } catch (NumberFormatException e) {
+                    invalidPropertyValueError("<value>", value, null);
+                }
+            } else if (extension.getType() == PDFObjectType.String) {
+                String value = (characters != null) ? characters.toString() : "";
+                extension.setValue(value);
+            }
+        }
+        super.endOfNode();
+    }
+
+    @Override
+    public String getLocalName() {
+        return extension.getType().elementName();
+    }
+}