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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.Dimension;
- import java.io.IOException;
- import java.io.OutputStream;
-
- import javax.xml.parsers.DocumentBuilder;
- import javax.xml.parsers.DocumentBuilderFactory;
- import javax.xml.parsers.ParserConfigurationException;
- import javax.xml.transform.Result;
- import javax.xml.transform.Source;
- import javax.xml.transform.Transformer;
- import javax.xml.transform.TransformerConfigurationException;
- import javax.xml.transform.TransformerException;
- import javax.xml.transform.dom.DOMResult;
- import javax.xml.transform.dom.DOMSource;
- import javax.xml.transform.sax.SAXResult;
- import javax.xml.transform.sax.TransformerHandler;
- import javax.xml.transform.stream.StreamResult;
-
- import org.w3c.dom.Document;
- import org.xml.sax.ContentHandler;
- import org.xml.sax.SAXException;
- import org.xml.sax.helpers.AttributesImpl;
-
- import org.apache.commons.io.IOUtils;
-
- import org.apache.fop.render.bitmap.BitmapRendererEventProducer;
- import org.apache.fop.render.bitmap.MultiFileRenderingUtil;
- import org.apache.fop.render.intermediate.DelegatingFragmentContentHandler;
- import org.apache.fop.render.intermediate.IFContext;
- import org.apache.fop.render.intermediate.IFException;
- import org.apache.fop.render.intermediate.IFPainter;
- import org.apache.fop.util.GenerationHelperContentHandler;
- import org.apache.fop.util.XMLUtil;
-
- /**
- * {@link org.apache.fop.render.intermediate.IFDocumentHandler} implementation
- * that writes SVG 1.1.
- */
- public class SVGDocumentHandler extends AbstractSVGDocumentHandler {
-
- /** Helper class for generating multiple files */
- private MultiFileRenderingUtil multiFileUtil;
-
- private StreamResult firstStream;
- private StreamResult currentStream;
-
- /** Used for single-page documents rendered to a DOM or SAX. */
- private Result simpleResult;
-
- private Document reusedParts;
-
- /**
- * Default constructor.
- */
- public SVGDocumentHandler(IFContext context) {
- super(context);
- this.multiFileUtil = null;
- this.reusedParts = null;
- }
-
- /** {@inheritDoc} */
- public boolean supportsPagesOutOfOrder() {
- return true;
- }
-
- /** {@inheritDoc} */
- public String getMimeType() {
- return MIME_TYPE;
- }
-
- /** {@inheritDoc} */
- public void setResult(Result result) throws IFException {
- if (result instanceof StreamResult) {
- multiFileUtil = new MultiFileRenderingUtil(FILE_EXTENSION_SVG,
- getUserAgent().getOutputFile());
- this.firstStream = (StreamResult)result;
- } else {
- this.simpleResult = result;
- }
- }
-
- /** {@inheritDoc} */
- public void startDocument() throws IFException {
- super.startDocument();
- DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
- builderFactory.setNamespaceAware(true);
- builderFactory.setValidating(false);
- try {
- DocumentBuilder builder = builderFactory.newDocumentBuilder();
- this.reusedParts = builder.newDocument();
- } catch (ParserConfigurationException e) {
- throw new IFException("Error while setting up a DOM for SVG generation", e);
- }
-
- try {
- TransformerHandler toDOMHandler = tFactory.newTransformerHandler();
- toDOMHandler.setResult(new DOMResult(this.reusedParts));
- this.handler = decorate(toDOMHandler);
- this.handler.startDocument();
- } catch (SAXException se) {
- throw new IFException("SAX error in startDocument()", se);
- } catch (TransformerConfigurationException e) {
- throw new IFException(
- "Error while setting up a TransformerHandler for SVG generation", e);
- }
- }
-
- /** {@inheritDoc} */
- public void endDocument() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void endDocumentHeader() throws IFException {
- super.endDocumentHeader();
- try {
- //Stop recording parts reused for each page
- this.handler.endDocument();
- this.handler = null;
- } catch (SAXException e) {
- throw new IFException("SAX error in endDocumentHeader()", e);
- }
- }
-
- /** {@inheritDoc} */
- public void startPageSequence(String id) throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void endPageSequence() throws IFException {
- //nop
- }
-
- /** {@inheritDoc} */
- public void startPage(int index, String name, String pageMasterName, Dimension size)
- throws IFException {
- if (this.multiFileUtil != null) {
- prepareHandlerWithOutputStream(index);
- } else {
- if (this.simpleResult == null) {
- //Only one page is supported with this approach at the moment
- throw new IFException(
- "Only one page is supported for output with the given Result instance!",
- null);
- }
- super.setResult(this.simpleResult);
- this.simpleResult = null;
- }
-
- try {
- handler.startDocument();
- handler.startPrefixMapping("", NAMESPACE);
- handler.startPrefixMapping(XLINK_PREFIX, XLINK_NAMESPACE);
- AttributesImpl atts = new AttributesImpl();
- XMLUtil.addAttribute(atts, "version", "1.1"); //SVG 1.1
- /*
- XMLUtil.addAttribute(atts, "index", Integer.toString(index));
- XMLUtil.addAttribute(atts, "name", name);
- */
- XMLUtil.addAttribute(atts, "width", SVGUtil.formatMptToPt(size.width) + "pt");
- XMLUtil.addAttribute(atts, "height", SVGUtil.formatMptToPt(size.height) + "pt");
- XMLUtil.addAttribute(atts, "viewBox",
- "0 0 " + SVGUtil.formatMptToPt(size.width)
- + " " + SVGUtil.formatMptToPt(size.height));
- handler.startElement("svg", atts);
-
- try {
- Transformer transformer = tFactory.newTransformer();
- Source src = new DOMSource(this.reusedParts.getDocumentElement());
- Result res = new SAXResult(new DelegatingFragmentContentHandler(this.handler));
- transformer.transform(src, res);
- } catch (TransformerConfigurationException tce) {
- throw new IFException("Error setting up a Transformer", tce);
- } catch (TransformerException te) {
- Throwable t = te.getCause();
- if (t instanceof SAXException) {
- throw (SAXException) t;
- } else if (t instanceof Exception) {
- throw new IFException("Error while serializing reused parts", (Exception) t);
- } else {
- throw new RuntimeException(t);
- }
- }
- } catch (SAXException e) {
- throw new IFException("SAX error in startPage()", e);
- }
- }
-
- private void prepareHandlerWithOutputStream(int index) throws IFException {
- OutputStream out;
- try {
- if (index == 0) {
- out = null;
- } else {
- out = this.multiFileUtil.createOutputStream(index);
- if (out == null) {
- BitmapRendererEventProducer eventProducer
- = BitmapRendererEventProducer.Provider.get(
- getUserAgent().getEventBroadcaster());
- eventProducer.stoppingAfterFirstPageNoFilename(this);
- }
- }
- } catch (IOException ioe) {
- throw new IFException("I/O exception while setting up output file", ioe);
- }
- if (out == null) {
- this.handler = decorate(createContentHandler(this.firstStream));
- } else {
- this.currentStream = new StreamResult(out);
- this.handler = decorate(createContentHandler(this.currentStream));
- }
- }
-
- private GenerationHelperContentHandler decorate(ContentHandler contentHandler) {
- return new GenerationHelperContentHandler(contentHandler, getMainNamespace(), getContext());
- }
-
- private void closeCurrentStream() {
- if (this.currentStream != null) {
- IOUtils.closeQuietly(currentStream.getOutputStream());
- currentStream.setOutputStream(null);
- IOUtils.closeQuietly(currentStream.getWriter());
- currentStream.setWriter(null);
- this.currentStream = null;
- }
- }
-
- /** {@inheritDoc} */
- public IFPainter startPageContent() throws IFException {
- try {
- handler.startElement("g");
- } catch (SAXException e) {
- throw new IFException("SAX error in startPageContent()", e);
- }
- return new SVGPainter(this, handler);
- }
-
- /** {@inheritDoc} */
- public void endPageContent() throws IFException {
- try {
- handler.endElement("g");
- } catch (SAXException e) {
- throw new IFException("SAX error in endPageContent()", e);
- }
- }
-
- /** {@inheritDoc} */
- public void endPage() throws IFException {
- try {
- handler.endElement("svg");
- this.handler.endDocument();
- } catch (SAXException e) {
- throw new IFException("SAX error in endPage()", e);
- }
- closeCurrentStream();
- }
-
- }
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