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- /*
- * Copyright 1999-2004 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.render.pdf;
-
- import org.apache.fop.render.XMLHandler;
- import org.apache.fop.render.RendererContext;
- import org.apache.fop.pdf.PDFDocument;
- import org.apache.fop.pdf.PDFPage;
- import org.apache.fop.pdf.PDFState;
- import org.apache.fop.pdf.PDFStream;
- import org.apache.fop.pdf.PDFNumber;
- import org.apache.fop.pdf.PDFResourceContext;
- import org.apache.fop.svg.PDFTextElementBridge;
- import org.apache.fop.svg.PDFAElementBridge;
- import org.apache.fop.svg.PDFGraphics2D;
- import org.apache.fop.svg.SVGUserAgent;
- import org.apache.fop.apps.Document;
-
- /* org.w3c.dom.Document is not imported to avoid conflict with
- org.apache.fop.control.Document */
-
- import java.io.OutputStream;
-
- import org.apache.batik.bridge.GVTBuilder;
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.bridge.ViewBox;
-
- import org.apache.batik.gvt.GraphicsNode;
-
- import org.w3c.dom.svg.SVGDocument;
- import org.w3c.dom.svg.SVGSVGElement;
-
- import java.awt.geom.AffineTransform;
-
- /**
- * PDF XML handler.
- * This handler handles XML for foreign objects when rendering to PDF.
- * It renders SVG to the PDF document using the PDFGraphics2D.
- * The properties from the PDF renderer are subject to change.
- */
- public class PDFXMLHandler implements XMLHandler {
- /**
- * The PDF document that is being drawn into.
- */
- public static final String PDF_DOCUMENT = "pdfDoc";
-
- /**
- * The output stream that the document is being sent to.
- */
- public static final String OUTPUT_STREAM = "outputStream";
-
- /**
- * The current pdf state.
- */
- public static final String PDF_STATE = "pdfState";
-
- /**
- * The current PDF page for page renference and as a resource context.
- */
- public static final String PDF_PAGE = "pdfPage";
-
- /**
- * The current PDF page for page renference and as a resource context.
- */
- public static final String PDF_CONTEXT = "pdfContext";
-
- /**
- * The current PDF stream to draw directly to.
- */
- public static final String PDF_STREAM = "pdfStream";
-
- /**
- * The width of the current pdf page.
- */
- public static final String PDF_WIDTH = "width";
-
- /**
- * The height of the current pdf page.
- */
- public static final String PDF_HEIGHT = "height";
-
- /**
- * The current font information for the pdf renderer.
- */
- public static final String PDF_FONT_INFO = "fontInfo";
-
- /**
- * The current pdf font name.
- */
- public static final String PDF_FONT_NAME = "fontName";
-
- /**
- * The current pdf font size.
- */
- public static final String PDF_FONT_SIZE = "fontSize";
-
- /**
- * The x position that this is being drawn at.
- */
- public static final String PDF_XPOS = "xpos";
-
- /**
- * The y position that this is being drawn at.
- */
- public static final String PDF_YPOS = "ypos";
-
- /**
- * Create a new PDF XML handler for use by the PDF renderer.
- */
- public PDFXMLHandler() {
- }
-
- /**
- * Handle the XML.
- * This checks the type of XML and handles appropraitely.
- *
- * @param context the renderer context
- * @param doc the XML document to render
- * @param ns the namespace of the XML document
- * @throws Exception any sort of exception could be thrown and shuld be handled
- */
- public void handleXML(RendererContext context, org.w3c.dom.Document doc,
- String ns) throws Exception {
- PDFInfo pdfi = getPDFInfo(context);
-
- String svg = "http://www.w3.org/2000/svg";
- if (svg.equals(ns)) {
- SVGHandler svghandler = new SVGHandler();
- svghandler.renderSVGDocument(context, doc, pdfi);
- } else {
- }
- }
-
- /**
- * Get the pdf information from the render context.
- *
- * @param context the renderer context
- * @return the pdf information retrieved from the context
- */
- public static PDFInfo getPDFInfo(RendererContext context) {
- PDFInfo pdfi = new PDFInfo();
- pdfi.pdfDoc = (PDFDocument)context.getProperty(PDF_DOCUMENT);
- pdfi.outputStream = (OutputStream)context.getProperty(OUTPUT_STREAM);
- pdfi.pdfState = (PDFState)context.getProperty(PDF_STATE);
- pdfi.pdfPage = (PDFPage)context.getProperty(PDF_PAGE);
- pdfi.pdfContext = (PDFResourceContext)context.getProperty(PDF_CONTEXT);
- pdfi.currentStream = (PDFStream)context.getProperty(PDF_STREAM);
- pdfi.width = ((Integer)context.getProperty(PDF_WIDTH)).intValue();
- pdfi.height = ((Integer)context.getProperty(PDF_HEIGHT)).intValue();
- pdfi.fi = (Document)context.getProperty(PDF_FONT_INFO);
- pdfi.currentFontName = (String)context.getProperty(PDF_FONT_NAME);
- pdfi.currentFontSize = ((Integer)context.getProperty(PDF_FONT_SIZE)).intValue();
- pdfi.currentXPosition = ((Integer)context.getProperty(PDF_XPOS)).intValue();
- pdfi.currentYPosition = ((Integer)context.getProperty(PDF_YPOS)).intValue();
- return pdfi;
- }
-
- /**
- * PDF information structure for drawing the XML document.
- */
- public static class PDFInfo {
- /** see PDF_DOCUMENT */
- public PDFDocument pdfDoc;
- /** see OUTPUT_STREAM */
- public OutputStream outputStream;
- /** see PDF_STATE */
- public PDFState pdfState;
- /** see PDF_PAGE */
- public PDFPage pdfPage;
- /** see PDF_CONTEXT */
- public PDFResourceContext pdfContext;
- /** see PDF_STREAM */
- public PDFStream currentStream;
- /** see PDF_WIDTH */
- public int width;
- /** see PDF_HEIGHT */
- public int height;
- /** see PDF_FONT_INFO */
- public Document fi;
- /** see PDF_FONT_NAME */
- public String currentFontName;
- /** see PDF_FONT_SIZE */
- public int currentFontSize;
- /** see PDF_XPOS */
- public int currentXPosition;
- /** see PDF_YPOS */
- public int currentYPosition;
- }
-
- /**
- * This method is placed in an inner class so that we don't get class
- * loading errors if batik is not present.
- */
- protected class SVGHandler {
- /**
- * Render the svg document.
- * @param context the renderer context
- * @param doc the svg document
- * @param pdfInfo the pdf information of the current context
- */
- protected void renderSVGDocument(RendererContext context,
- org.w3c.dom.Document doc, PDFInfo pdfInfo) {
- int xOffset = pdfInfo.currentXPosition;
- int yOffset = pdfInfo.currentYPosition;
-
- SVGUserAgent ua
- = new SVGUserAgent(context.getUserAgent().getLogger(),
- context.getUserAgent().getPixelUnitToMillimeter(),
- new AffineTransform());
-
- GVTBuilder builder = new GVTBuilder();
- BridgeContext ctx = new BridgeContext(ua);
- PDFTextElementBridge tBridge = new PDFTextElementBridge(pdfInfo.fi);
- ctx.putBridge(tBridge);
-
- PDFAElementBridge aBridge = new PDFAElementBridge();
- // to get the correct transform we need to use the PDFState
- AffineTransform transform = pdfInfo.pdfState.getTransform();
- transform.translate(xOffset / 1000f, yOffset / 1000f);
- aBridge.setCurrentTransform(transform);
- ctx.putBridge(aBridge);
-
- GraphicsNode root;
- try {
- root = builder.build(ctx, doc);
- } catch (Exception e) {
- context.getUserAgent().getLogger().error("svg graphic could not be built: "
- + e.getMessage(), e);
- return;
- }
- // get the 'width' and 'height' attributes of the SVG document
- float w = (float)ctx.getDocumentSize().getWidth() * 1000f;
- float h = (float)ctx.getDocumentSize().getHeight() * 1000f;
-
- float sx = pdfInfo.width / (float)w;
- float sy = pdfInfo.height / (float)h;
-
- ctx = null;
- builder = null;
-
- /*
- * Clip to the svg area.
- * Note: To have the svg overlay (under) a text area then use
- * an fo:block-container
- */
- pdfInfo.currentStream.add("q\n");
- // transform so that the coordinates (0,0) is from the top left
- // and positive is down and to the right. (0,0) is where the
- // viewBox puts it.
- pdfInfo.currentStream.add(sx + " 0 0 " + sy + " " + xOffset / 1000f + " "
- + yOffset / 1000f + " cm\n");
-
- SVGSVGElement svg = ((SVGDocument)doc).getRootElement();
- AffineTransform at = ViewBox.getPreserveAspectRatioTransform(svg, w / 1000f, h / 1000f);
- if (!at.isIdentity()) {
- double[] vals = new double[6];
- at.getMatrix(vals);
- pdfInfo.currentStream.add(PDFNumber.doubleOut(vals[0], 5) + " "
- + PDFNumber.doubleOut(vals[1], 5) + " "
- + PDFNumber.doubleOut(vals[2], 5) + " "
- + PDFNumber.doubleOut(vals[3], 5) + " "
- + PDFNumber.doubleOut(vals[4]) + " "
- + PDFNumber.doubleOut(vals[5]) + " cm\n");
- }
-
- if (pdfInfo.pdfContext == null) {
- pdfInfo.pdfContext = pdfInfo.pdfPage;
- }
- PDFGraphics2D graphics = new PDFGraphics2D(true, pdfInfo.fi, pdfInfo.pdfDoc,
- pdfInfo.pdfContext, pdfInfo.pdfPage.referencePDF(),
- pdfInfo.currentFontName,
- pdfInfo.currentFontSize);
- graphics.setGraphicContext(new org.apache.batik.ext.awt.g2d.GraphicContext());
- pdfInfo.pdfState.push();
- transform = new AffineTransform();
- // scale to viewbox
- transform.translate(xOffset / 1000f, yOffset / 1000f);
- pdfInfo.pdfState.setTransform(transform);
- graphics.setPDFState(pdfInfo.pdfState);
- graphics.setOutputStream(pdfInfo.outputStream);
- try {
- root.paint(graphics);
- pdfInfo.currentStream.add(graphics.getString());
- } catch (Exception e) {
- context.getUserAgent().getLogger().error("svg graphic could not be rendered: "
- + e.getMessage(), e);
- }
-
- pdfInfo.currentStream.add("Q\n");
- pdfInfo.pdfState.pop();
- }
- }
- }
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