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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.svg;
-
- import java.awt.font.FontRenderContext;
- import java.awt.geom.AffineTransform;
- import java.awt.geom.Rectangle2D;
- import java.util.StringTokenizer;
-
- import org.w3c.dom.DOMImplementation;
- import org.w3c.dom.Document;
- import org.w3c.dom.Element;
-
- import org.apache.batik.anim.dom.SVGDOMImplementation;
- import org.apache.batik.constants.XMLConstants;
-
- /**
- * Some utilities for creating svg DOM documents and elements.
- */
- public final class SVGUtilities {
-
- private SVGUtilities() {
- }
-
- private static final String SVG_NS = SVGDOMImplementation.SVG_NAMESPACE_URI;
-
- /**
- * Create a new svg document with batik.
- * @param width the width of the root svg element
- * @param height the height of the root svg element
- * @return a new SVG Document
- */
- public static Document createSVGDocument(float width,
- float height) {
- DOMImplementation impl = SVGDOMImplementation.getDOMImplementation();
- Document doc = impl.createDocument(SVG_NS, "svg", null);
-
- Element svgRoot = doc.getDocumentElement();
- svgRoot.setAttributeNS(null, "width", "" + width);
- svgRoot.setAttributeNS(null, "height", "" + height);
- return doc;
- }
-
- /**
- * Get the string width for a particular string given the font.
- * @param str the string
- * @param font the font
- * @return the width of the string in the given font
- */
- public static float getStringWidth(String str, java.awt.Font font) {
- Rectangle2D rect
- = font.getStringBounds(str, 0, str.length(),
- new FontRenderContext(new AffineTransform(),
- true, true));
- return (float)rect.getWidth();
- }
-
- /**
- * Get the string height for a particular string given the font.
- * @param str the string
- * @param font the font
- * @return the height of the string in the given font
- */
- public static float getStringHeight(String str,
- java.awt.Font font) {
- Rectangle2D rect
- = font.getStringBounds(str, 0, str.length(),
- new FontRenderContext(new AffineTransform(),
- true, true));
- return (float)rect.getHeight();
- }
-
- /**
- * Get the string bounds for a particular string given the font.
- * @param str the string
- * @param font the font
- * @return the bounds of the string
- */
- public static Rectangle2D getStringBounds(String str,
- java.awt.Font font) {
- return font.getStringBounds(str, 0, str.length(),
- new FontRenderContext(new AffineTransform(),
- true, true));
- }
-
- /**
- * Create an SVG Line
- * @param doc the document to create the element
- * @param x the start x position
- * @param y the start y position
- * @param x2 the end x position
- * @param y2 the end y position
- * @return the new line element
- */
- public static Element createLine(Document doc, float x, float y,
- float x2, float y2) {
- Element ellipse = doc.createElementNS(SVG_NS, "line");
- ellipse.setAttributeNS(null, "x1", "" + x);
- ellipse.setAttributeNS(null, "x2", "" + x2);
- ellipse.setAttributeNS(null, "y1", "" + y);
- ellipse.setAttributeNS(null, "y2", "" + y2);
- return ellipse;
- }
-
- /**
- * Create an SVG Ellipse
- * @param doc the document to create the element
- * @param cx the centre x position
- * @param cy the centre y position
- * @param rx the x axis radius
- * @param ry the y axis radius
- * @return the new ellipse element
- */
- public static Element createEllipse(Document doc, float cx,
- float cy, float rx, float ry) {
- Element ellipse = doc.createElementNS(SVG_NS, "ellipse");
- ellipse.setAttributeNS(null, "cx", "" + cx);
- ellipse.setAttributeNS(null, "rx", "" + rx);
- ellipse.setAttributeNS(null, "cy", "" + cy);
- ellipse.setAttributeNS(null, "ry", "" + ry);
- return ellipse;
- }
-
- /**
- * Create an SVG Path.
- * @param doc the document to create the element
- * @param str the string for the d attribute on the path
- * @return the new path element
- */
- public static Element createPath(Document doc, String str) {
- Element path = doc.createElementNS(SVG_NS, "path");
- path.setAttributeNS(null, "d", str);
- return path;
- }
-
- /**
- * Create an SVG Text object.
- * @param doc the document to create the element
- * @param x the start x position
- * @param y the start y position
- * @param str the string
- * @return the new text element
- */
- public static Element createText(Document doc, float x, float y,
- String str) {
- Element textGraph = doc.createElementNS(SVG_NS, "text");
- textGraph.setAttributeNS(null, "x", "" + x);
- textGraph.setAttributeNS(null, "y", "" + y);
- org.w3c.dom.Text text = doc.createTextNode(str);
- textGraph.appendChild(text);
- return textGraph;
- }
-
- /**
- * Create an SVG Rectangle.
- * @param doc the document to create the element
- * @param x the start x position
- * @param y the start y position
- * @param width the width of the rectangle
- * @param height the height of the rectangle
- * @return the new rectangle element
- */
- public static Element createRect(Document doc, float x, float y,
- float width, float height) {
- Element border = doc.createElementNS(SVG_NS, "rect");
- border.setAttributeNS(null, "x", "" + x);
- border.setAttributeNS(null, "y", "" + y);
- border.setAttributeNS(null, "width", "" + width);
- border.setAttributeNS(null, "height", "" + height);
- return border;
- }
-
- /**
- * Create an SVG G.
- * @param doc the document to create the element
- * @return the new g element
- */
- public static Element createG(Document doc) {
- Element border = doc.createElementNS(SVG_NS, "g");
- return border;
- }
-
- /**
- * Create an SVG Clip.
- * @param doc the document to create the element
- * @param els the child elements that make the clip
- * @param id the id of the clipping path
- * @return the new clip element
- */
- public static Element createClip(Document doc, Element els,
- String id) {
- Element border = doc.createElementNS(SVG_NS, "clipPath");
- border.setAttributeNS(null, "id", id);
- border.appendChild(els);
- return border;
- }
-
- /**
- * Create and svg image element.
- * @param doc the document to create the element
- * @param ref the href link to the image
- * @param width the width to set on the image
- * @param height the height to set on the image
- * @return a new image element
- */
- public static Element createImage(Document doc, String ref,
- float width, float height) {
- Element border = doc.createElementNS(SVG_NS, "image");
- border.setAttributeNS(XMLConstants.XLINK_NAMESPACE_URI, "href",
- ref);
- border.setAttributeNS(null, "width", "" + width);
- border.setAttributeNS(null, "height", "" + height);
- return border;
- }
-
- /**
- * Create some SVG text that is wrapped into a specified width.
- * @param doc the document to create the elements
- * @param str the string to wrap
- * @param font the font
- * @param width the width to wrap
- * @return the new element containing the wrapped text
- */
- public static Element wrapText(Document doc, String str,
- java.awt.Font font, float width) {
- Element g = createG(doc);
- Element text;
- StringTokenizer st = new StringTokenizer(str, " \t\r\n");
- float totalWidth = 0;
- String totalStr = "";
- int line = 0;
- float height = getStringHeight(str, font);
- while (st.hasMoreTokens()) {
- String token = st.nextToken();
- float strwidth = getStringWidth(token, font);
- totalWidth += strwidth;
- if (totalWidth > width) {
- if (totalStr.equals("")) {
- totalStr = token;
- token = "";
- strwidth = 0;
- }
- text = createText(doc, 0, line * (height + 5), totalStr);
- g.appendChild(text);
- totalStr = token;
- totalWidth = strwidth;
- line++;
- } else {
- totalStr = totalStr + " " + token;
- }
- }
-
- return g;
- }
-
- }
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