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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 java.awt.geom.Point2D;
import org.xml.sax.Locator;
import org.apache.xmlgraphics.util.QName;
import org.apache.fop.ResourceEventProducer;
import org.apache.fop.apps.FOPException;
import org.apache.fop.datatypes.Length;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.ValidationException;
import org.apache.fop.fo.XMLObj;
/**
* Class modelling the <a href="http://www.w3.org/TR/xsl/#fo_instream-foreign-object">
* <code>fo:instream-foreign-object</code></a> object.
* This is an atomic inline object that contains XML data.
*/
public class InstreamForeignObject extends AbstractGraphics {
// The value of properties relevant for fo:instream-foreign-object.
// All property values contained in AbstractGraphics
// End of property values
//Additional value
private Point2D intrinsicDimensions;
private boolean instrisicSizeDetermined;
private Length intrinsicAlignmentAdjust;
/**
* Constructs an instream-foreign-object object
* (called by {@link org.apache.fop.fo.ElementMapping.Maker}).
*
* @param parent the parent {@link FONode}
*/
public InstreamForeignObject(FONode parent) {
super(parent);
}
@Override
public void startOfNode() throws FOPException {
super.startOfNode();
getFOEventHandler().startInstreamForeignObject(this);
}
/**
* Make sure content model satisfied, if so then tell the
* {@link org.apache.fop.fo.FOEventHandler} that we are at
* the end of the instream-foreign-object.
* {@inheritDoc}
*/
public void endOfNode() throws FOPException {
if (firstChild == null) {
missingChildElementError("one (1) non-XSL namespace child");
}
getFOEventHandler().endInstreamForeignObject(this);
}
/**
* {@inheritDoc}
* <br>XSL Content Model: one (1) non-XSL namespace child
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
if (FO_URI.equals(nsURI)) {
invalidChildError(loc, nsURI, localName);
} else if (firstChild != null) {
tooManyNodesError(loc, new QName(nsURI, null, localName));
}
}
/** {@inheritDoc} */
public String getLocalName() {
return "instream-foreign-object";
}
/**
* {@inheritDoc}
* @return {@link org.apache.fop.fo.Constants#FO_INSTREAM_FOREIGN_OBJECT}
*/
public int getNameId() {
return FO_INSTREAM_FOREIGN_OBJECT;
}
/** Preloads the image so the intrinsic size is available. */
private void prepareIntrinsicSize() {
if (!this.instrisicSizeDetermined) {
XMLObj child = (XMLObj) firstChild;
Point2D csize = new Point2D.Float(-1, -1);
intrinsicDimensions = child.getDimension(csize);
if (intrinsicDimensions == null) {
ResourceEventProducer eventProducer = ResourceEventProducer.Provider.get(
getUserAgent().getEventBroadcaster());
eventProducer.ifoNoIntrinsicSize(this, getLocator());
}
intrinsicAlignmentAdjust = child.getIntrinsicAlignmentAdjust();
this.instrisicSizeDetermined = true;
}
}
/** {@inheritDoc} */
public int getIntrinsicWidth() {
prepareIntrinsicSize();
if (intrinsicDimensions != null) {
return (int)(intrinsicDimensions.getX() * 1000);
} else {
return 0;
}
}
/** {@inheritDoc} */
public int getIntrinsicHeight() {
prepareIntrinsicSize();
if (intrinsicDimensions != null) {
return (int)(intrinsicDimensions.getY() * 1000);
} else {
return 0;
}
}
/** {@inheritDoc} */
public Length getIntrinsicAlignmentAdjust() {
prepareIntrinsicSize();
return intrinsicAlignmentAdjust;
}
/** {@inheritDoc} */
protected void addChildNode(FONode child) throws FOPException {
super.addChildNode(child);
}
/** @return the {@link XMLObj} child node of the instream-foreign-object. */
public XMLObj getChildXMLObj() {
return (XMLObj) firstChild;
}
}
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