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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.render.svg;
-
- import java.awt.Rectangle;
- import java.io.IOException;
-
- import javax.xml.transform.Transformer;
- import javax.xml.transform.TransformerException;
- import javax.xml.transform.TransformerFactory;
- import javax.xml.transform.dom.DOMSource;
- import javax.xml.transform.sax.SAXResult;
-
- import org.w3c.dom.Document;
- import org.w3c.dom.Element;
- import org.xml.sax.Attributes;
- import org.xml.sax.ContentHandler;
- import org.xml.sax.SAXException;
- import org.xml.sax.helpers.AttributesImpl;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.image.loader.Image;
- import org.apache.xmlgraphics.image.loader.ImageFlavor;
- import org.apache.xmlgraphics.image.loader.impl.ImageRawStream;
- import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
-
- import org.apache.fop.image.loader.batik.BatikImageFlavors;
- import org.apache.fop.render.ImageHandler;
- import org.apache.fop.render.RenderingContext;
- import org.apache.fop.render.intermediate.DelegatingFragmentContentHandler;
-
- /**
- * Image handler implementation that embeds SVG images in the target SVG file.
- */
- public class EmbeddedSVGImageHandler implements ImageHandler, SVGConstants {
-
- /** logging instance */
- private static Log log = LogFactory.getLog(EmbeddedSVGImageHandler.class);
-
- /** Constant for the "CDATA" attribute type. */
- private static final String CDATA = "CDATA";
-
- /** {@inheritDoc} */
- public int getPriority() {
- return 500;
- }
-
- /** {@inheritDoc} */
- public Class getSupportedImageClass() {
- return ImageRawStream.class;
- }
-
- /** {@inheritDoc} */
- public ImageFlavor[] getSupportedImageFlavors() {
- return new ImageFlavor[] {
- BatikImageFlavors.SVG_DOM
- };
- }
-
- /*
- private void addAttribute(AttributesImpl atts, QName attribute, String value) {
- atts.addAttribute(attribute.getNamespaceURI(),
- attribute.getLocalName(), attribute.getQName(), CDATA, value);
- }
- */
-
- /** {@inheritDoc} */
- public void handleImage(RenderingContext context, Image image, final Rectangle pos)
- throws IOException {
- SVGRenderingContext svgContext = (SVGRenderingContext)context;
- if (!(image instanceof ImageXMLDOM)) {
- throw new IllegalStateException();
- }
- ImageXMLDOM svg = (ImageXMLDOM) image;
- ContentHandler handler = svgContext.getContentHandler();
- AttributesImpl atts = new AttributesImpl();
- atts.addAttribute("", "x", "x", CDATA, SVGUtil.formatMptToPt(pos.x));
- atts.addAttribute("", "y", "y", CDATA, SVGUtil.formatMptToPt(pos.y));
- atts.addAttribute("", "width", "width", CDATA, SVGUtil.formatMptToPt(pos.width));
- atts.addAttribute("", "height", "height", CDATA, SVGUtil.formatMptToPt(pos.height));
- try {
-
- Document doc = (Document)svg.getDocument();
- Element svgEl = (Element)doc.getDocumentElement();
- if (svgEl.getAttribute("viewBox").length() == 0) {
- log.warn("SVG doesn't have a viewBox. The result might not be scaled correctly!");
- }
-
- TransformerFactory tFactory = TransformerFactory.newInstance();
- Transformer transformer = tFactory.newTransformer();
- DOMSource src = new DOMSource(svg.getDocument());
- SAXResult res = new SAXResult(new DelegatingFragmentContentHandler(handler) {
-
- private boolean topLevelSVGFound;
-
- private void setAttribute(AttributesImpl atts, String localName, String value) {
- int index;
- index = atts.getIndex("", localName);
- if (index < 0) {
- atts.addAttribute("", localName, localName, CDATA, value);
- } else {
- atts.setAttribute(index, "", localName, localName, CDATA, value);
- }
- }
-
- public void startElement(String uri, String localName, String name, Attributes atts)
- throws SAXException {
- if (!topLevelSVGFound
- && SVG_ELEMENT.getNamespaceURI().equals(uri)
- && SVG_ELEMENT.getLocalName().equals(localName)) {
- topLevelSVGFound = true;
- AttributesImpl modAtts = new AttributesImpl(atts);
- setAttribute(modAtts, "x", SVGUtil.formatMptToPt(pos.x));
- setAttribute(modAtts, "y", SVGUtil.formatMptToPt(pos.y));
- setAttribute(modAtts, "width", SVGUtil.formatMptToPt(pos.width));
- setAttribute(modAtts, "height", SVGUtil.formatMptToPt(pos.height));
- super.startElement(uri, localName, name, modAtts);
- } else {
- super.startElement(uri, localName, name, atts);
- }
- }
-
- });
- transformer.transform(src, res);
- } catch (TransformerException te) {
- throw new IOException(te.getMessage());
- }
- }
-
- /** {@inheritDoc} */
- public boolean isCompatible(RenderingContext targetContext, Image image) {
- if (targetContext instanceof SVGRenderingContext) {
- if (image == null) {
- return true;
- }
- if (image instanceof ImageXMLDOM) {
- ImageXMLDOM svg = (ImageXMLDOM)image;
- return NAMESPACE.equals(svg.getRootNamespace());
- }
- }
- return false;
- }
-
- }
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