/*
*
*  gijvmasm.java
*
*  mic1 microarchitecture simulator 
*  Copyright (C) 1999, Prentice-Hall, Inc. 
* 
*  This program is free software; you can redistribute it and/or modify 
*  it under the terms of the GNU General Public License as published by 
*  the Free Software Foundation; either version 2 of the License, 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 General Public License along with 
*  this program; if not, write to: 
* 
*    Free Software Foundation, Inc. 
*    59 Temple Place - Suite 330 
*    Boston, MA 02111-1307, USA. 
* 
*  A copy of the GPL is available online the GNU web site: 
* 
*    http://www.gnu.org/copyleft/gpl.html
* 
*/ 

import java.awt.*;
import java.io.*;

/**
* GUI front-end to the IJVM Assembler.
*
* @author 
*   Dan Stone (<a href="mailto:dans@ontko.com"><i>dans@ontko.com</i></a>),
*   Ray Ontko & Co,
*   Richmond, Indiana, US
*/
public class gijvmasm extends Frame {

  private Panel
    label_panel,
    text_panel,
    browse_panel,
    stuff_panel,
    button_panel;
  private Button
    compile_button,
    cancel_button,
    in_button,
    out_button;
  private TextField
    in_text,
    out_text;
  private Label msg;

  public gijvmasm() {
    super("IJVM Assembler");

    label_panel = new Panel();
    label_panel.setLayout(new GridLayout(2,1,10,10));
    label_panel.add(new Label("Input file"));
    label_panel.add(new Label("Output file"));

    stuff_panel = new Panel();
    stuff_panel.setLayout(new BorderLayout());
    text_panel = new Panel();
    in_text = new TextField(30);
    out_text = new TextField(30);
    in_text.setEditable(true);
    out_text.setEditable(true);
    in_text.setText("");
    text_panel.setLayout(new GridLayout(2,1,10,10));
    text_panel.add(in_text);
    text_panel.add(out_text);

    browse_panel = new Panel();
    browse_panel.setLayout(new GridLayout(2,1,10,10));
    browse_panel.add(in_button = new Button("Find input file..."));
    browse_panel.add(out_button = new Button("Find output file..."));

    button_panel = new Panel();
    //button_panel.setLayout(new GridLayout(1,2,5,5));
    button_panel.setLayout(new FlowLayout(FlowLayout.CENTER,5,5));
    button_panel.add(compile_button = new Button("Compile"));
    button_panel.add(cancel_button = new Button("Exit"));
    msg = new Label();
    stuff_panel.add("West",label_panel);
    stuff_panel.add("Center",text_panel);
    stuff_panel.add("East",browse_panel);
    stuff_panel.add("South",button_panel);
    add("Center",stuff_panel);
    add("South",msg);
    msg.setText("Ready");
    show();
    resize(preferredSize());
    paintAll(getGraphics());
  }

  private void compile() {
    InputStream in = null;
    OutputStream out = null;
    IJVMAssembler ia = null;
    String infile = in_text.getText().trim();
    String outfile = out_text.getText().trim();
    if (infile.equals("")) {
      msg.setText("Source file must be given");
      return;
    }
    else if (!infile.endsWith(".jas")){
      msg.setText("Source file must be .jas file");
      return;
    }
    if (outfile == null || outfile.trim().equals("")) {
      outfile = infile.substring(0, infile.length() - 4) + ".ijvm";
    }
    if (!outfile.endsWith(".ijvm")) {
      msg.setText("Destination file must be .ijvm file");
      return;
    }
    else {
      try {
        in = new BufferedInputStream(new FileInputStream(infile));
      }
      catch (FileNotFoundException fnfe) {
        msg.setText("File not found: " + infile + ", unable to compile");
        return;
      }
      catch (IOException ioe) {
        msg.setText("Error opening file: " + infile + ", unable to compile");
        return;
      }
      try {
        out = new FileOutputStream(outfile);
      }
      catch (IOException ioe) {
        msg.setText("Error opening file: " + outfile + ", unable to compile");
        return;
      }
      msg.setText("Compiling " + infile);
      ia = new IJVMAssembler(in, out);
      if (ia.getStatus())
        msg.setText(outfile + " has been created");
      else
        msg.setText("Error compiling file: " + infile);
    }
  }

  private void getInfile() {
    FileDialog fd = new FileDialog(this, "Select infile", FileDialog.LOAD);
    fd.setFile("*.jas");
    fd.setDirectory(".");
    fd.show();
    if (fd.getFile() != null) {
      in_text.setText(fd.getDirectory() + fd.getFile());
    }
  }


  private void getOutfile() {
    FileDialog fd = new FileDialog(this, "Select outfile", FileDialog.LOAD);
    fd.setFile("*.ijvm");
    fd.setDirectory(".");
    fd.show();
    if (fd.getFile() != null) {
      out_text.setText(fd.getDirectory() + fd.getFile());
    }
  }
 
  public boolean handleEvent(Event event) {
    switch (event.id) {
    case Event.ACTION_EVENT :
      if (event.target == compile_button) {
        compile();
        return true;
      }
      else if (event.target == cancel_button) {
	System.exit(0);
        return true;
      }
      else if (event.target == in_button) {
	getInfile();
        return true;
      }
      else if (event.target == out_button) {
	getOutfile();
        return true;
      }
      break;
    case Event.WINDOW_DESTROY:
      System.exit(0);
      break;
    }
    return false;
  }

  public static void main(String args[]) {
    gijvmasm g = new gijvmasm();
  }
}