/*
* Copyright 2008 Germán Laullón
*
* 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.
*/
package com.coremedia.iso.gui.hex;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.nio.ByteBuffer;
/**
* Combines a hex view and an ASCII view to a fully fledged hex editor.
*/
public class JHexEditor extends JPanel implements FocusListener, AdjustmentListener, MouseWheelListener {
ByteBuffer buff;
public int cursor;
protected static Font font = new Font("Monospaced", 0, 12);
protected int border = 2;
public boolean DEBUG = false;
private JScrollBar scrollBar;
private int inicio = 0;
private int numberOfVisibleLines = 10;
public JHexEditor(ByteBuffer buff) {
super();
this.buff = buff;
this.addMouseWheelListener(this);
scrollBar = new JScrollBar(JScrollBar.VERTICAL);
scrollBar.addAdjustmentListener(this);
scrollBar.setMinimum(0);
scrollBar.setMaximum((int) (buff.limit() / getNumberOfVisibleLines()));
JPanel p1, p2, p3;
//centro
p1 = new JPanel(new BorderLayout(1, 1));
p1.add(new JHexEditorHEX(this), BorderLayout.CENTER);
p1.add(new Columnas(), BorderLayout.NORTH);
// izq.
p2 = new JPanel(new BorderLayout(1, 1));
p2.add(new Filas(), BorderLayout.CENTER);
p2.add(new Caja(), BorderLayout.NORTH);
// der
p3 = new JPanel(new BorderLayout(1, 1));
p3.add(scrollBar, BorderLayout.EAST);
p3.add(new JHexEditorASCII(this), BorderLayout.CENTER);
p3.add(new Caja(), BorderLayout.NORTH);
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout(1, 1));
panel.add(p1, BorderLayout.CENTER);
panel.add(p2, BorderLayout.WEST);
panel.add(p3, BorderLayout.EAST);
this.setLayout(new BorderLayout(1, 1));
this.add(panel, BorderLayout.CENTER);
}
public void paint(Graphics g) {
FontMetrics fn = getFontMetrics(font);
Rectangle rec = this.getBounds();
numberOfVisibleLines = (rec.height / fn.getHeight()) - 2;
int n = (int) (buff.limit() / 16);
if ((buff.limit() % 16) > 0) {
n++;
}
if (numberOfVisibleLines > n) {
numberOfVisibleLines = n;
inicio = 0;
}
scrollBar.setValues(getInicio(), getNumberOfVisibleLines(), 0, n);
scrollBar.setValueIsAdjusting(true);
super.paint(g);
}
protected void actualizaCursor() {
int n = (cursor / 16);
if ((buff.limit() % 16) > 0) {
n++;
}
if (n < inicio) {
inicio = n;
} else if (n >= inicio + numberOfVisibleLines) {
inicio = n - numberOfVisibleLines + 2;
}
repaint();
}
protected int getInicio() {
return inicio;
}
protected int getNumberOfVisibleLines() {
if (DEBUG) {
System.err.println("numberOfVisibleLines: " + numberOfVisibleLines);
}
return numberOfVisibleLines;
}
protected void filledCursor(Graphics g, int x, int y, int s) {
FontMetrics fn = getFontMetrics(font);
g.fillRect(((fn.stringWidth(" ") + 1) * x) + border, (fn.getHeight() * y) + border, ((fn.stringWidth(" ") + 1) * s), fn.getHeight() + 1);
}
protected void cuadro(Graphics g, int x, int y, int s) {
FontMetrics fn = getFontMetrics(font);
g.drawRect(((fn.stringWidth(" ") + 1) * x) + border, (fn.getHeight() * y) + border, ((fn.stringWidth(" ") + 1) * s), fn.getHeight() + 1);
}
protected void printString(Graphics g, String s, int x, int y) {
FontMetrics fn = getFontMetrics(font);
g.drawString(s, ((fn.stringWidth(" ") + 1) * x) + border, ((fn.getHeight() * (y + 1)) - fn.getMaxDescent()) + border);
}
public void focusGained(FocusEvent e) {
this.repaint();
}
public void focusLost(FocusEvent e) {
this.repaint();
}
public void adjustmentValueChanged(AdjustmentEvent e) {
inicio = e.getValue();
if (inicio < 0) inicio = 0;
repaint();
}
public void mouseWheelMoved(MouseWheelEvent e) {
inicio += (e.getUnitsToScroll());
int n = (int) (buff.limit() / 16);
n += 4;
if ((inicio + numberOfVisibleLines) >= n) {
inicio = n - numberOfVisibleLines;
}
if (inicio < 0) {
inicio = 0;
}
repaint();
}
public void keyPressed(KeyEvent e) {
switch (e.getKeyCode()) {
case 33: // rep
if (cursor >= (16 * numberOfVisibleLines)) {
cursor -= (16 * numberOfVisibleLines);
}
actualizaCursor();
break;
case 34: // fin
if (cursor < (buff.limit() - (16 * numberOfVisibleLines))) {
cursor += (16 * numberOfVisibleLines);
}
actualizaCursor();
break;
case 35: // fin
cursor = (int) (buff.limit() - 1);
actualizaCursor();
break;
case 36: // ini
cursor = 0;
actualizaCursor();
break;
case 37: // <--
if (cursor != 0) cursor--;
actualizaCursor();
break;
case 38: // <--
if (cursor > 15) cursor -= 16;
actualizaCursor();
break;
case 39: // -->
if (cursor != (buff.limit() - 1)) cursor++;
actualizaCursor();
break;
case 40: // -->
if (cursor < (buff.limit() - 16)) cursor += 16;
actualizaCursor();
break;
}
}
private class Columnas extends JPanel {
public Columnas() {
this.setLayout(new BorderLayout(1, 1));
}
public Dimension getPreferredSize() {
return getMinimumSize();
}
public Dimension getMinimumSize() {
Dimension d = new Dimension();
FontMetrics fn = getFontMetrics(font);
int h = fn.getHeight();
int nl = 1;
d.setSize(((fn.stringWidth(" ") + 1) * +((16 * 3) - 1)) + (border * 2) + 1, h * nl + (border * 2) + 1);
return d;
}
public void paint(Graphics g) {
Dimension d = getMinimumSize();
g.setColor(Color.white);
g.fillRect(0, 0, d.width, d.height);
g.setColor(Color.black);
g.setFont(font);
for (int n = 0; n < 16; n++) {
if (n == (cursor % 16)) cuadro(g, n * 3, 0, 2);
String s = "00" + Integer.toHexString(n);
s = s.substring(s.length() - 2);
printString(g, s, n * 3, 0);
}
}
}
private class Caja extends JPanel {
public Dimension getPreferredSize() {
return getMinimumSize();
}
public Dimension getMinimumSize() {
Dimension d = new Dimension();
FontMetrics fn = getFontMetrics(font);
int h = fn.getHeight();
d.setSize((fn.stringWidth(" ") + 1) + (border * 2) + 1, h + (border * 2) + 1);
return d;
}
}
private class Filas extends JPanel {
public Filas() {
this.setLayout(new BorderLayout(1, 1));
}
public Dimension getPreferredSize() {
return getMinimumSize();
}
public Dimension getMinimumSize() {
Dimension d = new Dimension();
FontMetrics fn = getFontMetrics(font);
int h = fn.getHeight();
int nl = getNumberOfVisibleLines();
d.setSize((fn.stringWidth(" ") + 1) * (8) + (border * 2) + 1, h * nl + (border * 2) + 1);
return d;
}
public void paint(Graphics g) {
Dimension d = getMinimumSize();
g.setColor(Color.white);
g.fillRect(0, 0, d.width, d.height);
g.setColor(Color.black);
g.setFont(font);
int ini = getInicio();
int fin = ini + getNumberOfVisibleLines();
int y = 0;
for (int n = ini; n < fin; n++) {
if (n == (cursor / 16)) cuadro(g, 0, y, 8);
String s = "0000000000000" + Integer.toHexString(n);
s = s.substring(s.length() - 8);
printString(g, s, 0, y++);
}
}
}
}
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