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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.apps.FOUserAgent;
- 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());
- FOUserAgent userAgent = getUserAgent();
- ImageFactory fact = userAgent.getFactory().getImageFactory();
- fopimage = fact.getImage(url, userAgent);
- 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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