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/*
* 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.flow;
import org.xml.sax.Locator;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.Constants;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FOText;
import org.apache.fop.fo.FObjMixed;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.ValidationException;
import org.apache.fop.fo.properties.CommonAccessibility;
import org.apache.fop.fo.properties.CommonAccessibilityHolder;
/**
* Class modelling the <a href=http://www.w3.org/TR/xsl/#fo_wrapper">
* <code>fo:wrapper</code></a> object.
* The <code>fo:wrapper</code> object serves as a property holder for
* its child node objects.
*/
public class Wrapper extends FObjMixed implements CommonAccessibilityHolder {
// used for FO validation
private boolean blockOrInlineItemFound = false;
private CommonAccessibility commonAccessibility;
/**
* Create a Wrapper instance that is a child of the
* given {@link FONode}
*
* @param parent {@link FONode} that is the parent of this object
*/
public Wrapper(FONode parent) {
super(parent);
}
@Override
public void bind(PropertyList pList) throws FOPException {
super.bind(pList);
commonAccessibility = CommonAccessibility.getInstance(pList);
}
@Override
public void startOfNode() throws FOPException {
super.startOfNode();
getFOEventHandler().startWrapper(this);
}
@Override
public void endOfNode() throws FOPException {
super.endOfNode();
getFOEventHandler().endWrapper(this);
}
/**
* {@inheritDoc}
* <br>XSL Content Model: marker* (#PCDATA|%inline;|%block;)*
* <br><i>Additionally (unimplemented): "An fo:wrapper that is a child of an
* fo:multi-properties is only permitted to have children that would
* be permitted in place of the fo:multi-properties."</i>
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
if (FO_URI.equals(nsURI)) {
if ("marker".equals(localName)) {
if (blockOrInlineItemFound) {
nodesOutOfOrderError(loc, "fo:marker",
"(#PCDATA|%inline;|%block;)");
}
} else if (isBlockOrInlineItem(nsURI, localName)) {
/* delegate validation to parent, but keep the error reporting
* tidy. If we would simply call validateChildNode() on the
* parent, the user would get a wrong impression, as only the
* locator (if any) will contain a reference to the offending
* fo:wrapper.
*/
try {
FONode.validateChildNode(this.parent, loc, nsURI, localName);
} catch (ValidationException vex) {
invalidChildError(loc, getName(), FO_URI, localName,
"rule.wrapperInvalidChildForParent");
}
blockOrInlineItemFound = true;
} else {
invalidChildError(loc, nsURI, localName);
}
}
}
/** {@inheritDoc} */
protected void addChildNode(FONode child) throws FOPException {
super.addChildNode(child);
/* If the child is a text node, and it generates areas
* (i.e. contains either non-white-space or preserved
* white-space), then check whether the nearest non-wrapper
* ancestor allows this.
*/
if (child instanceof FOText
&& ((FOText)child).willCreateArea()) {
FONode ancestor = parent;
while (ancestor.getNameId() == Constants.FO_WRAPPER) {
ancestor = ancestor.getParent();
}
if (!(ancestor instanceof FObjMixed)) {
invalidChildError(
getLocator(),
getLocalName(),
FONode.FO_URI,
"#PCDATA",
"rule.wrapperInvalidChildForParent");
}
}
}
/** {@inheritDoc} */
public String getLocalName() {
return "wrapper";
}
/**
* {@inheritDoc}
* @return {@link org.apache.fop.fo.Constants#FO_WRAPPER}
*/
public int getNameId() {
return FO_WRAPPER;
}
public CommonAccessibility getCommonAccessibility() {
return commonAccessibility;
}
@Override
public boolean isDelimitedTextRangeBoundary ( int boundary ) {
return false;
}
}
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