/* Copyright (C) 2004-2007 Sami Koivu
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.sf.rej.gui.hexeditor;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JList;
/**
* A MouseListener component for the HexEditor which translates user
* actions into the changes in the selection and content.
*
* @author Sami Koivu
*/
public class HexEditorKeyListener implements KeyListener {
private SelectionModel selectionModel;
private int width = 0;
private boolean readOnly;
private DataProvider dataProvider = null;
public HexEditorKeyListener(SelectionModel selectionModel) {
this.selectionModel = selectionModel;
}
public void keyPressed(KeyEvent e) {
switch(e.getKeyCode()) {
case KeyEvent.VK_LEFT: {
this.selectionModel.setSelectedIndex(Math.max(0, this.selectionModel.getMinimumIndex()-1));
int index = this.selectionModel.getMinimumIndex() / this.width;
setIndex(e, index);
break;
}
case KeyEvent.VK_RIGHT: {
this.selectionModel.setSelectedIndex(Math.min(this.selectionModel.getSize()-1, this.selectionModel.getMinimumIndex()+1));
int index = this.selectionModel.getMinimumIndex() / this.width;
setIndex(e, index);
break;
}
case KeyEvent.VK_UP: {
this.selectionModel.setSelectedIndex(Math.max(0, this.selectionModel.getMinimumIndex()-this.width));
int index = this.selectionModel.getMinimumIndex() / this.width;
setIndex(e, index);
break;
}
case KeyEvent.VK_DOWN: {
if (this.selectionModel.getMinimumIndex() == -1) {
this.selectionModel.setSelectedIndex(0);
} else {
this.selectionModel.setSelectedIndex(Math.min(this.selectionModel.getSize()-1, this.selectionModel.getMinimumIndex()+this.width));
}
int index = this.selectionModel.getMinimumIndex() / this.width;
setIndex(e, index);
break;
}
case KeyEvent.VK_HOME: {
this.selectionModel.setSelectedIndex(0);
setIndex(e, 0);
break;
}
case KeyEvent.VK_END: {
int index = this.selectionModel.getSize()-1;
this.selectionModel.setSelectedIndex(index);
setIndex(e, index / this.width);
break;
}
case KeyEvent.VK_PAGE_UP: {
JList list = (JList) e.getComponent();
int count = list.getLastVisibleIndex()-list.getFirstVisibleIndex();
this.selectionModel.setSelectedIndex(Math.max(0, this.selectionModel.getMinimumIndex()-(this.width*count)));
int index = this.selectionModel.getMinimumIndex() / this.width;
setIndex(e, index);
break;
}
case KeyEvent.VK_PAGE_DOWN: {
JList list = (JList) e.getComponent();
int count = list.getLastVisibleIndex()-list.getFirstVisibleIndex();
if (this.selectionModel.getMinimumIndex() == -1) {
this.selectionModel.setSelectedIndex(0);
} else {
this.selectionModel.setSelectedIndex(Math.min(this.selectionModel.getSize()-1, this.selectionModel.getMinimumIndex()+(this.width*count)));
}
int index = this.selectionModel.getMinimumIndex() / this.width;
setIndex(e, index);
break;
}
case KeyEvent.VK_TAB: {
this.selectionModel.setHexSelection(!this.selectionModel.getHexSelection());
e.consume();
e.getComponent().repaint();
break;
}
}
}
private void setIndex(KeyEvent e, int index) {
JList list = (JList)e.getComponent();
list.setSelectedIndex(index);
list.ensureIndexIsVisible(index);
e.consume();
list.repaint();
}
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
public void keyTyped(KeyEvent e) {
if (e.getKeyChar() == KeyEvent.VK_TAB) {
return;
}
if (readOnly) {
return; // early return
}
int index = this.selectionModel.getMinimumIndex();
if (index >= 0) {
if (this.selectionModel.getHexSelection()) {
if (this.selectionModel.getSubPosition() == 0) {
int value = getValue(e.getKeyChar());
if (value != -1) {
int oldValue = this.dataProvider.get(index) & 0xFF;
int newValue = (value * 16) + (oldValue % 16);
this.dataProvider.set(index, (byte)newValue);
this.selectionModel.setSubPosition(1);
setIndex(e, this.selectionModel.getMinimumIndex() / this.width);
}
} else {
int value = getValue(e.getKeyChar());
if (value != -1) {
int oldValue = this.dataProvider.get(index) & 0xFF;
int newValue = oldValue - (oldValue % 16) + value;
this.dataProvider.set(index, (byte)newValue);
this.selectionModel.setSelectedIndex(Math.min(this.selectionModel.getSize()-1, this.selectionModel.getMinimumIndex() + 1));
setIndex(e, this.selectionModel.getMinimumIndex() / this.width);
}
}
} else {
this.dataProvider.set(index, (byte)e.getKeyChar());
this.selectionModel.setSelectedIndex(Math.min(this.selectionModel.getSize()-1, this.selectionModel.getMinimumIndex() + 1));
setIndex(e, this.selectionModel.getMinimumIndex() / this.width);
}
}
}
public void setWidth(int width) {
this.width = width;
}
public void setReadOnly(boolean readOnly) {
this.readOnly = readOnly;
}
public void setDataProvider(DataProvider provider) {
this.dataProvider = provider;
}
private int getValue(char c) {
switch (c) {
case '0':
return 0;
case '1':
return 1;
case '2':
return 2;
case '3':
return 3;
case '4':
return 4;
case '5':
return 5;
case '6':
return 6;
case '7':
return 7;
case '8':
return 8;
case '9':
return 9;
case 'a':
return 10;
case 'b':
return 11;
case 'c':
return 12;
case 'd':
return 13;
case 'e':
return 14;
case 'f':
return 15;
}
return -1;
}
}