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org.apache.fop.fo.flow.Marker Maven / Gradle / Ivy
/*
* 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: Marker.java 724444 2008-12-08 18:54:16Z adelmelle $ */
package org.apache.fop.fo.flow;
import java.util.Collections;
import java.util.Map;
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.FOTreeBuilderContext;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.FObjMixed;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.PropertyListMaker;
import org.apache.fop.fo.ValidationException;
import org.apache.fop.fo.properties.Property;
import org.apache.fop.fo.properties.PropertyCache;
/**
* Class modelling the
* fo:marker object.
*/
public class Marker extends FObjMixed {
// The value of properties relevant for fo:marker.
private String markerClassName;
// End of property values
private PropertyListMaker savePropertyListMaker;
private Map descendantPropertyLists = new java.util.HashMap();
/**
* Create a marker fo.
*
* @param parent the parent {@link FONode}
*/
public Marker(FONode parent) {
super(parent);
}
/** {@inheritDoc} */
public void bind(PropertyList pList) throws FOPException {
if (findAncestor(FO_FLOW) < 0) {
invalidChildError(locator, getParent().getName(), FO_URI, getName(),
"rule.markerDescendantOfFlow");
}
markerClassName = pList.get(PR_MARKER_CLASS_NAME).getString();
if (markerClassName == null || markerClassName.equals("")) {
missingPropertyError("marker-class-name");
}
}
/**
* Retrieve the property list of the given {@link FONode}
* descendant
*
* @param foNode the {@link FONode} whose property list is requested
* @return the {@link MarkerPropertyList} for the given node
*/
protected MarkerPropertyList getPropertyListFor(FONode foNode) {
return (MarkerPropertyList)
descendantPropertyLists.get(foNode);
}
/** {@inheritDoc} */
protected void startOfNode() {
FOTreeBuilderContext builderContext = getBuilderContext();
// Push a new property list maker which will make MarkerPropertyLists.
savePropertyListMaker = builderContext.getPropertyListMaker();
builderContext.setPropertyListMaker(new PropertyListMaker() {
public PropertyList make(FObj fobj, PropertyList parentPropertyList) {
PropertyList pList = new MarkerPropertyList(fobj, parentPropertyList);
descendantPropertyLists.put(fobj, pList);
return pList;
}
});
}
/** {@inheritDoc} */
protected void endOfNode() throws FOPException {
super.endOfNode();
// Pop the MarkerPropertyList maker.
getBuilderContext().setPropertyListMaker(savePropertyListMaker);
savePropertyListMaker = null;
}
/**
* {@inheritDoc}
* Additionally: "An fo:marker may contain any formatting objects that
* are permitted as a replacement of any fo:retrieve-marker that retrieves
* the fo:marker's children."
* @todo implement "additional" constraint, possibly within fo:retrieve-marker
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
if (FO_URI.equals(nsURI)) {
if (!isBlockOrInlineItem(nsURI, localName)) {
invalidChildError(loc, nsURI, localName);
}
}
}
/** {@inheritDoc} */
protected boolean inMarker() {
return true;
}
/** @return the "marker-class-name" property */
public String getMarkerClassName() {
return markerClassName;
}
/** {@inheritDoc} */
public String getLocalName() {
return "marker";
}
/**
* {@inheritDoc}
* @return {@link org.apache.fop.fo.Constants#FO_MARKER}
*/
public int getNameId() {
return FO_MARKER;
}
/** {@inheritDoc} */
public String toString() {
StringBuffer sb = new StringBuffer(super.toString());
sb.append(" {").append(getMarkerClassName()).append("}");
return sb.toString();
}
/**
* An implementation of {@link PropertyList} which only stores the explicitly
* specified properties/attributes as bundles of name-value-namespace
* strings
*/
protected class MarkerPropertyList extends PropertyList
implements Attributes {
/** the array of attributes **/
private MarkerAttribute[] attribs;
/**
* Overriding default constructor
*
* @param fobj the {@link FObj} to attach
* @param parentPropertyList ignored
*/
public MarkerPropertyList(FObj fobj, PropertyList parentPropertyList) {
/* ignore parentPropertyList
* won't be used because the attributes will be stored
* without resolving
*/
super(fobj, null);
}
/**
* Override that doesn't convert the attributes to {@link Property}
* instances, but simply stores the attributes for later processing.
*
* {@inheritDoc}
*/
public void addAttributesToList(Attributes attributes)
throws ValidationException {
this.attribs = new MarkerAttribute[attributes.getLength()];
String name;
String value;
String namespace;
String qname;
for (int i = attributes.getLength(); --i >= 0;) {
namespace = attributes.getURI(i);
qname = attributes.getQName(i);
name = attributes.getLocalName(i);
value = attributes.getValue(i);
this.attribs[i] =
MarkerAttribute.getInstance(namespace, qname, name, value);
}
}
/** Null implementation; not used by this type of {@link PropertyList} */
public void putExplicit(int propId, Property value) {
//nop
}
/** Null implementation; not used by this type of {@link PropertyList} */
public Property getExplicit(int propId) {
return null;
}
/** {@inheritDoc} */
public int getLength() {
if (attribs == null) {
return 0;
} else {
return attribs.length;
}
}
/** {@inheritDoc} */
public String getURI(int index) {
if (attribs != null
&& index < attribs.length
&& index >= 0
&& attribs[index] != null) {
return attribs[index].namespace;
} else {
return null;
}
}
/** {@inheritDoc} */
public String getLocalName(int index) {
if (attribs != null
&& index < attribs.length
&& index >= 0
&& attribs[index] != null) {
return attribs[index].name;
} else {
return null;
}
}
/** {@inheritDoc} */
public String getQName(int index) {
if (attribs != null
&& index < attribs.length
&& index >= 0
&& attribs[index] != null) {
return attribs[index].qname;
} else {
return null;
}
}
/** Default implementation; not used */
public String getType(int index) {
return "CDATA";
}
/** {@inheritDoc} */
public String getValue(int index) {
if (attribs != null
&& index < attribs.length
&& index >= 0
&& attribs[index] != null) {
return attribs[index].value;
} else {
return null;
}
}
/** {@inheritDoc} */
public int getIndex(String name, String namespace) {
int index = -1;
if (attribs != null && name != null && namespace != null) {
for (int i = attribs.length; --i >= 0;) {
if (attribs[i] != null
&& namespace.equals(attribs[i].namespace)
&& name.equals(attribs[i].name)) {
break;
}
}
}
return index;
}
/** {@inheritDoc} */
public int getIndex(String qname) {
int index = -1;
if (attribs != null && qname != null) {
for (int i = attribs.length; --i >= 0;) {
if (attribs[i] != null
&& qname.equals(attribs[i].qname)) {
break;
}
}
}
return index;
}
/** Default implementation; not used */
public String getType(String name, String namespace) {
return "CDATA";
}
/** Default implementation; not used */
public String getType(String qname) {
return "CDATA";
}
/** {@inheritDoc} */
public String getValue(String name, String namespace) {
int index = getIndex(name, namespace);
if (index > 0) {
return getValue(index);
}
return null;
}
/** {@inheritDoc} */
public String getValue(String qname) {
int index = getIndex(qname);
if (index > 0) {
return getValue(index);
}
return null;
}
}
/** Convenience inner class */
public static final class MarkerAttribute {
private static PropertyCache attributeCache =
new PropertyCache(MarkerAttribute.class);
protected String namespace;
protected String qname;
protected String name;
protected String value;
/**
* Main constructor
* @param namespace the namespace URI
* @param qname the qualified name
* @param name the name
* @param value the value
*/
private MarkerAttribute(String namespace, String qname,
String name, String value) {
this.namespace = namespace;
this.qname = qname;
this.name = (name == null ? qname : name);
this.value = value;
}
/**
* Convenience method, reduces the number
* of distinct MarkerAttribute instances
*
* @param namespace the attribute namespace
* @param qname the fully qualified name of the attribute
* @param name the attribute name
* @param value the attribute value
* @return the single MarkerAttribute instance corresponding to
* the name/value-pair
*/
private static MarkerAttribute getInstance(
String namespace, String qname,
String name, String value) {
return attributeCache.fetch(
new MarkerAttribute(namespace, qname, name, value));
}
/** {@inheritDoc} */
public int hashCode() {
int hash = 17;
hash = (37 * hash) + (this.namespace == null ? 0 : this.namespace.hashCode());
hash = (37 * hash) + (this.qname == null ? 0 : this.qname.hashCode());
hash = (37 * hash) + (this.name == null ? 0 : this.name.hashCode());
hash = (37 * hash) + (this.value == null ? 0 : this.value.hashCode());
return hash;
}
/** {@inheritDoc} */
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o instanceof MarkerAttribute) {
MarkerAttribute attr = (MarkerAttribute) o;
return ((attr.namespace == this.namespace)
|| (attr.namespace != null
&& attr.namespace.equals(this.namespace)))
&& ((attr.qname == this.qname)
|| (attr.qname != null
&& attr.qname.equals(this.qname)))
&& ((attr.name == this.name)
|| (attr.name != null
&& attr.name.equals(this.name)))
&& ((attr.value == this.value)
|| (attr.value != null
&& attr.value.equals(this.value)));
} else {
return false;
}
}
}
}
