/* Window Copyright (C) 1999-2002 Jochen Hoenicke.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; see the file COPYING.LESSER.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Id$
 */

package net.sf.jode.decompiler;
import java.awt.*;
///#ifndef AWT10
import java.awt.event.*;
///#endif
import java.io.*;
import net.sf.jode.GlobalOptions;

public class Window 
    implements Runnable
///#ifndef AWT10
    , ActionListener
///#endif

{
    TextField classpathField, classField;
    TextArea  sourcecodeArea, errorArea;
    Checkbox  verboseCheck, prettyCheck;
    Button startButton, saveButton;
    String lastClassName, lastClassPath;
    Frame frame;

    PrintWriter errStream;
    Decompiler decompiler = new Decompiler();
    Thread decompileThread;
    
    public Window(Container window) {
	buildComponents(window);
    }

    private void buildComponents(Container window) {
	if (window instanceof Frame)
	    frame = (Frame) window;

	window.setFont(new Font("dialog", Font.PLAIN, 10));

	classpathField = new TextField(50);
	classField = new TextField(50);
	sourcecodeArea = new TextArea(20, 80);
	errorArea = new TextArea(3, 80);
	verboseCheck = new Checkbox("verbose", true);
	prettyCheck = new Checkbox("pretty", true);
	startButton = new Button("start");
	saveButton = new Button("save");
///#ifdef AWT10
///	saveButton.disable();
///#else
	saveButton.setEnabled(false);
///#endif

	sourcecodeArea.setEditable(false);
	errorArea.setEditable(false);
	Font monospaced = new Font("monospaced", Font.PLAIN, 10);
	sourcecodeArea.setFont(monospaced);
	errorArea.setFont(monospaced);

	GridBagLayout gbl = new GridBagLayout();
	window.setLayout(gbl);
	GridBagConstraints labelConstr = new GridBagConstraints();
	GridBagConstraints textConstr = new GridBagConstraints();
	GridBagConstraints areaConstr = new GridBagConstraints();
	GridBagConstraints checkConstr = new GridBagConstraints();
	GridBagConstraints buttonConstr = new GridBagConstraints();
	labelConstr.fill = GridBagConstraints.NONE;
	textConstr.fill = GridBagConstraints.HORIZONTAL;
	areaConstr.fill = GridBagConstraints.BOTH;
	checkConstr.fill = GridBagConstraints.NONE;
	buttonConstr.fill = GridBagConstraints.NONE;
	labelConstr.anchor = GridBagConstraints.EAST;
	textConstr.anchor = GridBagConstraints.CENTER;
	checkConstr.anchor = GridBagConstraints.WEST;
	buttonConstr.anchor = GridBagConstraints.CENTER;
	labelConstr.anchor = GridBagConstraints.EAST;
	textConstr.gridwidth = GridBagConstraints.REMAINDER;
	textConstr.weightx = 1.0;
	areaConstr.gridwidth = GridBagConstraints.REMAINDER;
	areaConstr.weightx = 1.0;
	areaConstr.weighty = 1.0;

///#ifdef AWT10
///	Label label = new Label("class path: ");
///	gbl.setConstraints(label, labelConstr);
///	window.add(label);
///	gbl.setConstraints(classpathField, textConstr);
///	window.add(classpathField);
///	label = new Label("class name: ");
///	gbl.setConstraints(label, labelConstr);
///	window.add(label);
///	gbl.setConstraints(classField, textConstr);
///	window.add(classField);
///	gbl.setConstraints(verboseCheck, checkConstr);
///	window.add(verboseCheck);
///	gbl.setConstraints(prettyCheck, checkConstr);
///	window.add(prettyCheck);
///	labelConstr.weightx = 1.0;
///	label = new Label();
///	gbl.setConstraints(label, labelConstr);
///	window.add(label);
///	gbl.setConstraints(startButton, buttonConstr);
///	window.add(startButton);
///	buttonConstr.gridwidth = GridBagConstraints.REMAINDER;
///	gbl.setConstraints(saveButton, buttonConstr);
///	window.add(saveButton);
///	gbl.setConstraints(sourcecodeArea, areaConstr);
///	window.add(sourcecodeArea);
///	areaConstr.gridheight = GridBagConstraints.REMAINDER;
///	areaConstr.weighty = 0.0;
///	gbl.setConstraints(errorArea, areaConstr);
///	window.add(errorArea);
///#else
	window.add(new Label("class path: "), labelConstr);
	window.add(classpathField, textConstr);
	window.add(new Label("class name: "), labelConstr);
	window.add(classField, textConstr);
	window.add(verboseCheck, checkConstr);
	window.add(prettyCheck, checkConstr);
	labelConstr.weightx = 1.0;
	window.add(new Label(), labelConstr);
	window.add(startButton, buttonConstr);
	buttonConstr.gridwidth = GridBagConstraints.REMAINDER;
	window.add(saveButton, buttonConstr);
	window.add(sourcecodeArea, areaConstr);
	areaConstr.gridheight = GridBagConstraints.REMAINDER;
	areaConstr.weighty = 0.0;
	window.add(errorArea, areaConstr);

	startButton.addActionListener(this);
	saveButton.addActionListener(this);
///#endif
	errStream = new PrintWriter(new AreaWriter(errorArea));
	decompiler.setErr(errStream);
    }

    public void setClassPath(String cp) {
	classpathField.setText(cp);
    }
    public void setClass(String cls) {
	classField.setText(cls);
    }
	
///#ifdef AWT10
///    public synchronized void action(Event e, Object target) {
///#else
    public synchronized void actionPerformed(ActionEvent e) {
	Object target = e.getSource();
///#endif
	if (target == startButton) {

///#ifdef AWT10
///	    startButton.disable();
///#else
	    startButton.setEnabled(false);
///#endif
	    decompileThread = new Thread(this);
	    sourcecodeArea.setText("Please wait, while decompiling...\n");
	    decompileThread.start();
	} else if (target == saveButton) {
	    if (frame == null)
		frame = new Frame(); //XXX
	    FileDialog fd = new FileDialog(frame, 
					   "Save decompiled code", 
					   FileDialog.SAVE);
	    fd.setFile(lastClassName.substring
		       (lastClassName.lastIndexOf('.')+1).concat(".java"));
	    fd.setVisible(true);
	    String fileName = fd.getFile();
	    if (fileName == null)
		return;
	    try {
		File f = new File(new File(fd.getDirectory()), fileName);
		FileWriter out = new FileWriter(f);
		out.write(sourcecodeArea.getText());
		out.close();
	    } catch (IOException ex) {
		errorArea.setText("");
		errStream.println("Couldn't write to file " 
				       + fileName + ": ");
		ex.printStackTrace(errStream);
	    } catch (SecurityException ex) {
		errorArea.setText("");
		errStream.println("Couldn't write to file " 
				       + fileName + ": ");
		ex.printStackTrace(errStream);
	    }
	}
    }

    public class AreaWriter extends Writer {
	boolean initialized = false;
	private TextArea area;

	public AreaWriter(TextArea a) {
	    area = a;
	}

	public void write(char[] b, int off, int len) throws IOException {
	    if (!initialized) {
		area.setText("");
		initialized = true;
	    }
///#ifdef AWT10
///	    area.appendText(new String(b, off, len));
///#else
	    area.append(new String(b, off, len));
///#endif
	}

	public void flush() {
	}

	public void close() {
	}
    }

    public void run() {
	decompiler.setOption("verbose", verboseCheck.getState() ? "1" : "0");
	decompiler.setOption("pretty", prettyCheck.getState() ? "1" : "0");
	errorArea.setText("");
///#ifdef AWT10
///	saveButton.disable();
///#else
	saveButton.setEnabled(false);
///#endif

	lastClassName = classField.getText();
	String newClassPath = classpathField.getText();
	if (!newClassPath.equals(lastClassPath)) {
	    decompiler.setClassPath(newClassPath);
	    lastClassPath = newClassPath;
	}
				    
	try {
	    Writer writer
		= new BufferedWriter(new AreaWriter(sourcecodeArea), 512);
	    try {
		decompiler.decompile(lastClassName, writer, null);
	    } catch (IllegalArgumentException ex) {
		sourcecodeArea.setText
		    ("`"+lastClassName+"' is not a class name.\n"
		     +"You have to give a full qualified classname "
		     +"with '.' as package delimiter \n"
		     +"and without .class ending.");
		return;
	    }
///#ifdef AWT10
///	    saveButton.enable();
///#else
	    saveButton.setEnabled(true);
///#endif
	} catch (Throwable t) {
	    sourcecodeArea.setText("Didn't succeed.\n"
				   +"Check the below area for more info.");
	    t.printStackTrace();
	} finally {
	    synchronized(this) {
		decompileThread = null;
///#ifdef AWT10
///		startButton.enable();
///#else
		startButton.setEnabled(true);
///#endif
	    }
	}
    }

    public static void main(String argv[]) {
	Frame frame = new Frame(GlobalOptions.copyright);
	Window win = new Window(frame);

	String cp = System.getProperty("java.class.path");
	if (cp != null)
	    win.setClassPath(cp.replace(File.pathSeparatorChar, 
					Decompiler.altPathSeparatorChar));
	String cls = win.getClass().getName();
	win.setClass(cls);

///#ifndef AWT10
	frame.addWindowListener(new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {
		System.exit(0);
	    }
	});
///#endif
	frame.pack();
	frame.setVisible(true);
    }
}