/*
 * CompactaRLE.java
 *
 * Created on 11 de Setembro de 2002, 01:15
 */

package Compactador;

import java.io.*;
import java.text.*;

/**
 *
 * @author  Roberval Alves Godoy
 */
public class CompactaRLE extends javax.swing.JFrame {
    String c = "";

    /** Creates new form CompactaRLE */
    public CompactaRLE() {

        initComponents();
                setSize(700,500);
    }
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        jPanel1 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTextArea2 = new javax.swing.JTextArea();
        jScrollPane3 = new javax.swing.JScrollPane();
        jTextArea3 = new javax.swing.JTextArea();
        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jLabel7 = new javax.swing.JLabel();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jTextField4 = new javax.swing.JTextField();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jButton5 = new javax.swing.JButton();
        
        setTitle("Compactador Run Length Encoding - RLE");
        setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
            }
        });
        
        jPanel1.setLayout(null);
        
        jPanel1.setBorder(new javax.swing.border.EtchedBorder());
        jTextArea1.setEditable(false);
        jTextArea1.setLineWrap(true);
        jTextArea1.setBorder(new javax.swing.border.TitledBorder("Arquivo Original"));
        jScrollPane1.setViewportView(jTextArea1);
        
        jPanel1.add(jScrollPane1);
        jScrollPane1.setBounds(30, 100, 170, 240);
        
        jTextArea2.setEditable(false);
        jTextArea2.setLineWrap(true);
        jTextArea2.setBorder(new javax.swing.border.TitledBorder("Arquivo Compactado"));
        jScrollPane2.setViewportView(jTextArea2);
        
        jPanel1.add(jScrollPane2);
        jScrollPane2.setBounds(250, 100, 170, 240);
        
        jTextArea3.setEditable(false);
        jTextArea3.setLineWrap(true);
        jTextArea3.setBorder(new javax.swing.border.TitledBorder("Arquivo Descompactado"));
        jScrollPane3.setViewportView(jTextArea3);
        
        jPanel1.add(jScrollPane3);
        jScrollPane3.setBounds(470, 100, 170, 240);
        
        jPanel1.add(jTextField1);
        jTextField1.setBounds(30, 60, 170, 20);
        
        jButton1.setText("Compactar");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        
        jPanel1.add(jButton1);
        jButton1.setBounds(250, 50, 170, 26);
        
        jButton2.setText("Descompactar");
        jButton2.setEnabled(false);
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });
        
        jPanel1.add(jButton2);
        jButton2.setBounds(470, 50, 170, 26);
        
        jLabel1.setText("Nome do Arquivo");
        jPanel1.add(jLabel1);
        jLabel1.setBounds(70, 30, 96, 16);
        
        jLabel5.setText("Tamanho Original");
        jPanel1.add(jLabel5);
        jLabel5.setBounds(30, 360, 100, 16);
        
        jLabel6.setText("Tamanho Compactado");
        jPanel1.add(jLabel6);
        jLabel6.setBounds(30, 390, 128, 16);
        
        jLabel7.setText("Taxa de Compacta\u00e7\u00e3o");
        jPanel1.add(jLabel7);
        jLabel7.setBounds(30, 420, 127, 16);
        
        jTextField2.setEnabled(false);
        jPanel1.add(jTextField2);
        jTextField2.setBounds(180, 360, 110, 20);
        
        jTextField3.setEnabled(false);
        jPanel1.add(jTextField3);
        jTextField3.setBounds(180, 390, 110, 20);
        
        jTextField4.setEnabled(false);
        jPanel1.add(jTextField4);
        jTextField4.setBounds(180, 420, 110, 20);
        
        jButton3.setText("Gravar Arquivo");
        jButton3.setEnabled(false);
        jButton3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3ActionPerformed(evt);
            }
        });
        
        jPanel1.add(jButton3);
        jButton3.setBounds(500, 360, 120, 26);
        
        jButton4.setText("Limpar");
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
            }
        });
        
        jPanel1.add(jButton4);
        jButton4.setBounds(500, 390, 120, 26);
        
        jButton5.setText("Sair");
        jButton5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton5ActionPerformed(evt);
            }
        });
        
        jPanel1.add(jButton5);
        jButton5.setBounds(500, 420, 120, 26);
        
        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);
        
        pack();
    }//GEN-END:initComponents

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton4ActionPerformed
        // Add your handling code here:
        limpaTela(4);
    }//GEN-LAST:event_jButton4ActionPerformed

    private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton5ActionPerformed
        // Add your handling code here:
        System.exit(0);
    }//GEN-LAST:event_jButton5ActionPerformed

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton3ActionPerformed
        // Add your handling code here:
        try {
            gravarArquivo(c);
        }
        catch (IOException e) { 
            jTextArea3.setText("Erro na Gravação");
        }
    }//GEN-LAST:event_jButton3ActionPerformed

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
        // Add your handling code here:
        try {
            jTextArea3.setText("");
            descompactaArquivo(c);
        }
        catch (IOException e) {
            jTextArea3.setText("Erro na Descompactação");
        }
    }//GEN-LAST:event_jButton2ActionPerformed

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        // Add your handling code here:
        try {
            limpaTela(1);
            String n = lerArquivo(jTextField1.getText());
            jTextField2.setText(n.length() + " bytes");
	    c = compactaArquivo(n);
            jTextField3.setText(c.length() + " bytes");
            calcTaxa(n.length(), c.length());
            jButton2.setEnabled(true);
            jButton3.setEnabled(true);
        }
	catch (IOException e) {
            jTextArea1.setText("Erro de leitura");
	}
    }//GEN-LAST:event_jButton1ActionPerformed

    private String lerArquivo(String text) throws IOException {
        StringBuffer strin = new StringBuffer();
        FileReader frin = new FileReader(text);
        BufferedReader brin = new BufferedReader(frin);
        String s;
        for(s = brin.readLine(); s != null; s = brin.readLine()) {
            jTextArea1.append(s);
            strin.append(s);
        }
        brin.close();
        return strin.toString();
    }
    
    private String compactaArquivo(String text) {
        StringBuffer strin = new StringBuffer();
        int i = 0;
	int count;
	char c;

	while(i < text.length()) {
            count=0;
	    c = text.charAt(i);
	    while( (i< text.length()) && (c == text.charAt(i)) ) {
                count++;
                i++;
	    }
	    if(count > 1) {
                while(count > 9) {
                    strin.append('#');
                    strin.append(9);
                    strin.append(c);
                    count= count-9;
                }
                strin.append('#');
                strin.append(count);
                strin.append(c);
	    }
            else {
                strin.append(c);
	    }
        }
        String n = new String(strin);
        jTextArea2.append(n);
        return strin.toString();
    }
    
    public String descompactaArquivo(String text) throws IOException {
        StringBuffer strin = new StringBuffer();
        int i = 0;
        int j = 0;
        int count = 0;
        char cLeitura;

        while(i< text.length()) {
            cLeitura= text.charAt(i);
            if(cLeitura == '#'){
                count= Integer.parseInt(String.valueOf(text.charAt(++i)));
                cLeitura= text.charAt(++i);
                for(j= 0; j<count; j++){
                    strin.append(cLeitura);
                }
            }
            else {
                strin.append(cLeitura);
            }
            i++;
        }
        String n = new String(strin);
        jTextArea3.append(n);
        return strin.toString();
    }
    
    public void calcTaxa (int n, int c) {        
        double x = (1 - ((double)c / (double)n)) * 100;
        NumberFormat nfx = NumberFormat.getNumberInstance();
        String stx = nfx.format(x);
        jTextField4.setText(stx + "%");
    }
    
    public void limpaTela (int i) {
        if (i == 4)
            jTextField1.setText("");
        jTextArea1.setText("");
        jTextArea2.setText("");
        jTextArea3.setText("");
        jTextField2.setText("");
        jTextField3.setText("");
        jTextField4.setText("");
        jButton2.setEnabled(false);
        jButton3.setEnabled(false);
    }
    
    public void gravarArquivo(String text) throws IOException {        
        String grava = jTextField1.getText();
        FileWriter fwout = new FileWriter(grava.substring(0, (grava.length() - 3)) + "rle");
	BufferedWriter bwout = new BufferedWriter(fwout);
        
	bwout.write(text);
	bwout.close();
    }
        
    
    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        new CompactaRLE().show();
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea jTextArea2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JTextArea jTextArea3;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JTextField jTextField4;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JButton jButton5;
    // End of variables declaration//GEN-END:variables
}