groove.io.external.util.GraphToPDF.java Source code

Introduction

Here is the source code for groove.io.external.util.GraphToPDF.java

Source

/* GROOVE: GRaphs for Object Oriented VErification
 * Copyright 2003--2011 University of Twente
 *
 * 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: GraphToPDF.java 5786 2016-08-04 09:36:22Z rensink $
 */
package groove.io.external.util;

import java.awt.geom.Rectangle2D;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import com.itextpdf.awt.DefaultFontMapper;
import com.itextpdf.awt.PdfGraphics2D;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfWriter;

import groove.gui.jgraph.JGraph;
import groove.io.external.PortException;
import groove.util.Version;

/** Class offering the functionality to save a JGraph to PDF format. */
public class GraphToPDF extends GraphToVector {
    @Override
    public void renderGraph(JGraph<?> graph, File file) throws PortException {
        // Get graph bounds. If not available, do nothing (probably empty graph)
        Rectangle2D bounds = graph.getGraphBounds();
        if (bounds == null) {
            return;
        }
        Rectangle bound = new Rectangle((float) bounds.getWidth(), (float) bounds.getHeight());

        try (FileOutputStream fos = new FileOutputStream(file)) {
            Document document = new Document(bound);
            // Open file, create PDF document
            PdfWriter writer = PdfWriter.getInstance(document, fos);
            // Set some metadata
            document.addCreator(Version.getAbout());

            // Open document, get graphics
            document.open();
            PdfContentByte cb = writer.getDirectContent();
            boolean onlyShapes = true;
            //The embedded fonts most likely do not contain all necessary glyphs, so using outlines instead
            // onlyShapes makes PDF considerably bigger, but no alternative at the moment
            PdfGraphics2D pdf2d = new PdfGraphics2D(cb, (float) bounds.getWidth(), (float) bounds.getHeight(),
                    new DefaultFontMapper(), onlyShapes, false, (float) 100.0);

            // Render
            toGraphics(graph, pdf2d);

            // Cleanup
            pdf2d.dispose();
            document.close();
        } catch (DocumentException | IOException e) {
            throw new PortException(e);
        }
    }
}