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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.fo.extensions.svg;
-
- // FOP
- import java.awt.geom.AffineTransform;
- import java.awt.geom.Point2D;
- import java.awt.geom.Rectangle2D;
- import java.net.URI;
-
- import org.w3c.dom.Element;
-
- import org.apache.batik.bridge.UnitProcessor;
- import org.apache.batik.dom.svg.SVGContext;
- import org.apache.batik.dom.svg.SVGDOMImplementation;
- import org.apache.batik.dom.svg.SVGOMDocument;
- import org.apache.batik.dom.svg.SVGOMElement;
- import org.apache.batik.dom.util.XMLSupport;
- import org.apache.batik.util.SVGConstants;
-
- import org.apache.fop.fo.FONode;
- import org.apache.fop.util.ContentHandlerFactory;
-
- /**
- * Class representing the SVG root element
- * for constructing an SVG document.
- */
- public class SVGElement extends SVGObj {
-
- /**
- * Constructs an SVG object
- *
- * @param parent the parent formatting object
- */
- public SVGElement(FONode parent) {
- super(parent);
- }
-
- /** {@inheritDoc} */
- public ContentHandlerFactory getContentHandlerFactory() {
- return new SVGDOMContentHandlerFactory();
- }
-
- /**
- * Get the dimensions of this XML document.
- * @param view the viewport dimensions
- * @return the dimensions of this SVG document
- */
- public Point2D getDimension(final Point2D view) {
-
- // TODO change so doesn't hold onto fo, area tree
- Element svgRoot = element;
- /* create an SVG area */
- /* if width and height are zero, get the bounds of the content. */
-
- try {
- URI baseUri = getUserAgent().getNewURIResolver().getBaseURI();
- if (baseUri != null) {
- SVGOMDocument svgdoc = (SVGOMDocument)doc;
- svgdoc.setURLObject(baseUri.toURL());
- //The following line should not be called to leave FOP compatible to Batik 1.6.
- //svgdoc.setDocumentURI(baseURL.toString());
- }
- } catch (Exception e) {
- log.error("Could not set base URL for svg", e);
- }
-
- final float ptmm = getUserAgent().getSourcePixelUnitToMillimeter();
- // temporary svg context
- SVGContext dc = new SVGContext() {
- public float getPixelToMM() {
- return ptmm;
- }
- public float getPixelUnitToMillimeter() {
- return ptmm;
- }
-
- public Rectangle2D getBBox() {
- return new Rectangle2D.Double(0, 0, view.getX(), view.getY());
- }
-
- /**
- * Returns the transform from the global transform space to pixels.
- */
- public AffineTransform getScreenTransform() {
- throw new UnsupportedOperationException("NYI");
- }
-
- /**
- * Sets the transform to be used from the global transform space
- * to pixels.
- */
- public void setScreenTransform(AffineTransform at) {
- throw new UnsupportedOperationException("NYI");
- }
-
- public AffineTransform getCTM() {
- return new AffineTransform();
- }
-
- public AffineTransform getGlobalTransform() {
- return new AffineTransform();
- }
-
- public float getViewportWidth() {
- return (float)view.getX();
- }
-
- public float getViewportHeight() {
- return (float)view.getY();
- }
-
- public float getFontSize() {
- return 12;
- }
-
- public void deselectAll() {
- }
- };
- SVGOMElement e = (SVGOMElement)svgRoot;
- e.setSVGContext(dc);
-
- //if (!e.hasAttributeNS(XMLSupport.XMLNS_NAMESPACE_URI, "xmlns")) {
- e.setAttributeNS(XMLSupport.XMLNS_NAMESPACE_URI, "xmlns",
- SVGDOMImplementation.SVG_NAMESPACE_URI);
- //}
- int fontSize = 12;
- Point2D p2d = getSize(fontSize, svgRoot, getUserAgent().getSourcePixelUnitToMillimeter());
- e.setSVGContext(null);
-
- return p2d;
- }
-
- /**
- * Get the size of the SVG root element.
- * @param size the font size
- * @param svgRoot the svg root element
- * @param ptmm the pixel to millimeter conversion factor
- * @return the size of the SVG document
- */
- public static Point2D getSize(int size, Element svgRoot, float ptmm) {
- String str;
- UnitProcessor.Context ctx;
- ctx = new PDFUnitContext(size, svgRoot, ptmm);
- str = svgRoot.getAttributeNS(null, SVGConstants.SVG_WIDTH_ATTRIBUTE);
- if (str.length() == 0) {
- str = "100%";
- }
- float width = UnitProcessor.svgHorizontalLengthToUserSpace
- (str, SVGConstants.SVG_WIDTH_ATTRIBUTE, ctx);
-
- str = svgRoot.getAttributeNS(null, SVGConstants.SVG_HEIGHT_ATTRIBUTE);
- if (str.length() == 0) {
- str = "100%";
- }
- float height = UnitProcessor.svgVerticalLengthToUserSpace
- (str, SVGConstants.SVG_HEIGHT_ATTRIBUTE, ctx);
- return new Point2D.Float(width, height);
- }
-
- /**
- * This class is the default context for a particular
- * element. Information not available on the element are obtained from
- * the bridge context (such as the viewport or the pixel to
- * millimeter factor.
- */
- public static class PDFUnitContext implements UnitProcessor.Context {
-
- /** The element. */
- private Element e;
- private int fontSize;
- private float pixeltoMM;
-
- /**
- * Create a PDF unit context.
- * @param size the font size.
- * @param e the svg element
- * @param ptmm the pixel to millimeter factor
- */
- public PDFUnitContext(int size, Element e, float ptmm) {
- this.e = e;
- this.fontSize = size;
- this.pixeltoMM = ptmm;
- }
-
- /**
- * Returns the element.
- * @return the element
- */
- public Element getElement() {
- return e;
- }
-
- /**
- * Returns the context of the parent element of this context.
- * Since this is always for the root SVG element there never
- * should be one...
- * @return null
- */
- public UnitProcessor.Context getParentElementContext() {
- return null;
- }
-
- /**
- * Returns the pixel to mm factor. (this is deprecated)
- * @return the pixel to millimeter factor
- */
- public float getPixelToMM() {
- return pixeltoMM;
- }
-
- /**
- * Returns the pixel to mm factor.
- * @return the pixel to millimeter factor
- */
- public float getPixelUnitToMillimeter() {
- return pixeltoMM;
- }
-
- /**
- * Returns the font-size value.
- * @return the default font size
- */
- public float getFontSize() {
- return fontSize;
- }
-
- /**
- * Returns the x-height value.
- * @return the x-height value
- */
- public float getXHeight() {
- return 0.5f;
- }
-
- /**
- * Returns the viewport width used to compute units.
- * @return the default viewport width of 100
- */
- public float getViewportWidth() {
- return 100;
- }
-
- /**
- * Returns the viewport height used to compute units.
- * @return the default viewport height of 100
- */
- public float getViewportHeight() {
- return 100;
- }
- }
-
- }
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