fop/src/org/apache/fop/apps/AWTCommandLine.java

package org.apache.fop.apps;
/*
  originally contributed by
  Juergen Verwohlt: Juergen.Verwohlt@jCatalog.com,
  Rainer Steinkuhle: Rainer.Steinkuhle@jCatalog.com,
  Stanislav Gorkhover: Stanislav.Gorkhover@jCatalog.com
 */
import org.apache.fop.messaging.MessageHandler;
import org.apache.fop.viewer.*;
import org.apache.fop.render.awt.*;


import javax.swing.UIManager;
import java.awt.*;

// SAX
import org.xml.sax.XMLReader;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;



// Java
import java.io.FileReader;
import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URL;
import java.util.*;



/**
 * initialize AWT previewer
 */

public class AWTCommandLine {


    public static String TRANSLATION_PATH = "/org/apache/fop/viewer/resources/";


    private Translator resource;



    public AWTCommandLine(String srcFile, String language) {

        if (language == null)
            language = System.getProperty("user.language");

        resource = getResourceBundle(TRANSLATION_PATH + "resources." +
                                     language);

        UserMessage.setTranslator(
          getResourceBundle(TRANSLATION_PATH + "messages." +
                            language));

        resource.setMissingEmphasized(false);
        AWTRenderer renderer = new AWTRenderer(resource);
        PreviewDialog frame = createPreviewDialog(renderer, resource);
        renderer.setProgressListener(frame);
        renderer.setComponent(frame);
        MessageHandler.setOutputMethod(MessageHandler.EVENT);
        MessageHandler.addListener(frame);

        //init parser
        frame.progress(resource.getString("Init parser") + " ...");
        XMLReader parser = createParser();

        if (parser == null) {
            MessageHandler.errorln("ERROR: Unable to create SAX parser");
            System.exit(1);
        }

        // setting the necessary parser features
        try {
            parser.setFeature("http://xml.org/sax/features/namespace-prefixes",
                              true);
        } catch (SAXException e) {
            MessageHandler.errorln("Error in setting up parser feature namespace-prefixes");
            MessageHandler.errorln("You need a parser which supports SAX version 2");
            System.exit(1);
        }

        try {
            Driver driver = new Driver();
            driver.setRenderer(renderer);

            // init mappings: time
            frame.progress(resource.getString("Init mappings") + " ...");

            driver.addElementMapping("org.apache.fop.fo.StandardElementMapping");
            driver.addElementMapping("org.apache.fop.svg.SVGElementMapping");
            driver.addPropertyList("org.apache.fop.fo.StandardPropertyListMapping");
            driver.addPropertyList("org.apache.fop.svg.SVGPropertyListMapping");

            // build FO tree: time
            frame.progress(resource.getString("Build FO tree") + " ...");
            driver.buildFOTree(parser, fileInputSource(srcFile));

            // layout FO tree: time
            frame.progress(resource.getString("Layout FO tree") + " ...");
            driver.format();

            // render: time
            frame.progress(resource.getString("Render") + " ...");
            driver.render();

            frame.progress(resource.getString("Show"));
            frame.showPage();

        } catch (Exception e) {
            MessageHandler.errorln("FATAL ERROR: " + e.getMessage());
            e.printStackTrace();
            System.exit(1);
        }
    }


    static XMLReader createParser() {
        String parserClassName = System.getProperty("org.xml.sax.parser");
        if (parserClassName == null) {
            parserClassName = "org.apache.xerces.parsers.SAXParser";
        }
        MessageHandler.logln("using SAX parser " + parserClassName);

        try {
            return (XMLReader) Class.forName(
                     parserClassName).newInstance();
        } catch (ClassNotFoundException e) {
            MessageHandler.errorln("Could not find " + parserClassName);
        }
        catch (InstantiationException e) {
            MessageHandler.errorln("Could not instantiate " +
                                   parserClassName);
        }
        catch (IllegalAccessException e) {
            MessageHandler.errorln("Could not access " + parserClassName);
        }
        catch (ClassCastException e) {
            MessageHandler.errorln(parserClassName + " is not a SAX driver");
        }
        return null;
    }



    protected PreviewDialog createPreviewDialog(AWTRenderer renderer,
            Translator res) {
        PreviewDialog frame = new PreviewDialog(renderer, res);
        frame.validate();

        // center window
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frameSize = frame.getSize();
        if (frameSize.height > screenSize.height)
            frameSize.height = screenSize.height;
        if (frameSize.width > screenSize.width)
            frameSize.width = screenSize.width;
        frame.setLocation((screenSize.width - frameSize.width) / 2,
                          (screenSize.height - frameSize.height) / 2);
        frame.setVisible(true);
        return frame;
    }



    /**
      * create an InputSource from a file name
      *
      * @param filename the name of the file
      * @return the InputSource created
      */
    protected static InputSource fileInputSource(String filename) {
        /* this code adapted from James Clark's in XT */
        File file = new File(filename);
        String path = file.getAbsolutePath();
        String fSep = System.getProperty("file.separator");
        if (fSep != null && fSep.length() == 1)
            path = path.replace(fSep.charAt(0), '/');
        if (path.length() > 0 && path.charAt(0) != '/')
            path = '/' + path;
        try {
            return new InputSource(new URL("file", null, path).toString());
        } catch (java.net.MalformedURLException e) {
            throw new Error("unexpected MalformedURLException");
        }
    }


    private SecureResourceBundle getResourceBundle(String path) {
        InputStream in = null;

        try {
            URL url = getClass().getResource(path);
            in = url.openStream();
        } catch (Exception ex) {
            MessageHandler.logln("Can't find URL to: <" + path + "> " +
                                 ex.getMessage());
        }
        return new SecureResourceBundle(in);
    }


    /* main
      */
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(
              new javax.swing.plaf.metal.MetalLookAndFeel());
        } catch (Exception e) {
            e.printStackTrace();
        }

        String srcPath = null;
        String language = null;
        String imageDir = null;

        MessageHandler.errorln(Version.getVersion());
        if (args.length < 1 || args.length > 3) {
            MessageHandler.errorln("usage: java AWTCommandLine " + "formatting-object-file [language] ");
            System.exit(1);
        }

        srcPath = args[0];
        if (args.length > 1) {
            language = args[1];
        }

        new AWTCommandLine(srcPath, language);

    } // main
} // AWTCommandLine