MissingGlyph.java example

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geogebra-master
/*
 * SVG Salamander
 * Copyright (c) 2004, Mark McKay
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or 
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   - Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the following
 *     disclaimer.
 *   - Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 * 
 * Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
 * projects can be found at http://www.kitfox.com
 *
 * Created on February 20, 2004, 10:00 PM
 */
package com.kitfox.svg;

import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.Rectangle2D;
import java.util.Iterator;

import com.kitfox.svg.pathcmd.BuildHistory;
import com.kitfox.svg.pathcmd.PathCommand;
import com.kitfox.svg.xml.StyleAttribute;

/**
 * Implements an embedded font.
 *
 * SVG specification: http://www.w3.org/TR/SVG/fonts.html
 *
 * @author Mark McKay
 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
 */
public class MissingGlyph extends ShapeElement {
	public static final String TAG_NAME = "missingglyph";

	// We may define a path
	Shape path = null;
	// Alternately, we may have child graphical elements
	int horizAdvX = -1; // Inherits font's value if not set
	int vertOriginX = -1; // Inherits font's value if not set
	int vertOriginY = -1; // Inherits font's value if not set
	int vertAdvY = -1; // Inherits font's value if not set

	/**
	 * Creates a new instance of Font
	 */
	public MissingGlyph() {
	}

	@Override
	public String getTagName() {
		return TAG_NAME;
	}

	/**
	 * Called after the start element but before the end element to indicate
	 * each child tag that has been processed
	 */
	@Override
	public void loaderAddChild(SVGLoaderHelper helper, SVGElement child)
			throws SVGElementException {
		super.loaderAddChild(helper, child);
	}

	@Override
	protected void build() throws SVGException {
		super.build();

		StyleAttribute sty = new StyleAttribute();

		String commandList = "";
		if (getPres(sty.setName("d"))) {
			commandList = sty.getStringValue();
		}

		// If glyph path was specified, calculate it
		if (commandList != null) {
			String fillRule = getStyle(sty.setName("fill-rule"))
					? sty.getStringValue() : "nonzero";

			PathCommand[] commands = parsePathList(commandList);

			GeneralPath buildPath = new GeneralPath(fillRule.equals("evenodd")
					? GeneralPath.WIND_EVEN_ODD : GeneralPath.WIND_NON_ZERO,
					commands.length);

			BuildHistory hist = new BuildHistory();

			for (int i = 0; i < commands.length; i++) {
				PathCommand cmd = commands[i];
				cmd.appendPath(buildPath, hist);
			}

			// Reflect glyph path to put it in user coordinate system
			AffineTransform at = new AffineTransform();
			at.scale(1, -1);
			path = at.createTransformedShape(buildPath);
		}

		// Read glyph spacing info
		if (getPres(sty.setName("horiz-adv-x"))) {
			horizAdvX = sty.getIntValue();
		}

		if (getPres(sty.setName("vert-origin-x"))) {
			vertOriginX = sty.getIntValue();
		}

		if (getPres(sty.setName("vert-origin-y"))) {
			vertOriginY = sty.getIntValue();
		}

		if (getPres(sty.setName("vert-adv-y"))) {
			vertAdvY = sty.getIntValue();
		}
	}

	public Shape getPath() {
		return path;
	}

	@Override
	public void render(Graphics2D g) throws SVGException {
		// Do not push or pop stack

		if (path != null) {
			renderShape(g, path);
		}

		Iterator it = children.iterator();
		while (it.hasNext()) {
			SVGElement ele = (SVGElement) it.next();
			if (ele instanceof RenderableElement) {
				((RenderableElement) ele).render(g);
			}
		}

		// Do not push or pop stack
	}

	public int getHorizAdvX() {
		if (horizAdvX == -1) {
			horizAdvX = ((Font) parent).getHorizAdvX();
		}
		return horizAdvX;
	}

	public int getVertOriginX() {
		if (vertOriginX == -1) {
			vertOriginX = getHorizAdvX() / 2;
		}
		return vertOriginX;
	}

	public int getVertOriginY() {
		if (vertOriginY == -1) {
			vertOriginY = ((Font) parent).getFontFace().getAscent();
		}
		return vertOriginY;
	}

	public int getVertAdvY() {
		if (vertAdvY == -1) {
			vertAdvY = ((Font) parent).getFontFace().getUnitsPerEm();
		}
		return vertAdvY;

	}

	@Override
	public Shape getShape() {
		if (path != null) {
			return shapeToParent(path);
		}
		return null;
	}

	@Override
	public Rectangle2D getBoundingBox() throws SVGException {
		if (path != null) {
			return boundsToParent(includeStrokeInBounds(path.getBounds2D()));
		}
		return null;
	}

	/**
	 * Updates all attributes in this diagram associated with a time event. Ie,
	 * all attributes with track information.
	 *
	 * @return - true if this node has changed state as a result of the time
	 *         update
	 */
	@Override
	public boolean updateTime(double curTime) throws SVGException {
		// Fonts can't change
		return false;
	}
}