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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed 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.apache.fop.apps.FOPException;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.ValidationException;
import org.apache.fop.image.FopImage;
import org.apache.fop.image.ImageFactory;
import org.xml.sax.Locator;
/**
* External graphic formatting object.
* This FO node handles the external graphic. It creates an image
* inline area that can be added to the area tree.
*/
public class ExternalGraphic extends AbstractGraphics {
// The value of properties relevant for fo:external-graphic.
// All but one of the e-g properties are kept in AbstractGraphics
private String src;
// End of property values
//Additional values
private String url;
private FopImage fopimage;
/**
* Create a new External graphic node.
*
* @param parent the parent of this node
*/
public ExternalGraphic(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FObj#bind(PropertyList)
*/
public void bind(PropertyList pList) throws FOPException {
super.bind(pList);
src = pList.get(PR_SRC).getString();
//Additional processing: preload image
url = ImageFactory.getURL(getSrc());
ImageFactory fact = ImageFactory.getInstance();
fopimage = fact.getImage(url, getUserAgent());
if (fopimage == null) {
getLogger().error("Image not available: " + getSrc());
} else {
// load dimensions
if (!fopimage.load(FopImage.DIMENSIONS)) {
getLogger().error("Cannot read image dimensions: " + getSrc());
}
}
//TODO Report to caller so he can decide to throw an exception
}
/**
* @see org.apache.fop.fo.FONode#startOfNode
*/
protected void startOfNode() throws FOPException {
checkId(getId());
getFOEventHandler().image(this);
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
* XSL Content Model: empty
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
invalidChildError(loc, nsURI, localName);
}
/**
* @return the "src" property.
*/
public String getSrc() {
return src;
}
/**
* @return Get the resulting URL based on the src property.
*/
public String getURL() {
return url;
}
/** @see org.apache.fop.fo.FONode#getLocalName() */
public String getLocalName() {
return "external-graphic";
}
/**
* @see org.apache.fop.fo.FObj#getNameId()
*/
public int getNameId() {
return FO_EXTERNAL_GRAPHIC;
}
/**
* @see org.apache.fop.fo.flow.AbstractGraphics#getIntrinsicWidth()
*/
public int getIntrinsicWidth() {
if (fopimage != null) {
return fopimage.getIntrinsicWidth();
} else {
return 0;
}
}
/**
* @see org.apache.fop.fo.flow.AbstractGraphics#getIntrinsicHeight()
*/
public int getIntrinsicHeight() {
if (fopimage != null) {
return fopimage.getIntrinsicHeight();
} else {
return 0;
}
}
}
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