/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.hex;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.ArrayList;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.KeyStroke;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Caret {
private static Color SELECT_COLOR = new Color(192, 192, 255);
private class Listener implements MouseListener, MouseMotionListener,
KeyListener, FocusListener {
public void mouseClicked(MouseEvent e) { }
public void mousePressed(MouseEvent e) {
Measures measures = hex.getMeasures();
long loc = measures.toAddress(e.getX(), e.getY());
setDot(loc, (e.getModifiers() & InputEvent.SHIFT_MASK) != 0);
if (!hex.isFocusOwner()) hex.requestFocus();
}
public void mouseReleased(MouseEvent e) {
mouseDragged(e);
}
public void mouseEntered(MouseEvent e) { }
public void mouseExited(MouseEvent e) { }
public void mouseDragged(MouseEvent e) {
Measures measures = hex.getMeasures();
long loc = measures.toAddress(e.getX(), e.getY());
setDot(loc, true);
// TODO should repeat dragged events when mouse leaves the
// component
}
public void mouseMoved(MouseEvent e) { }
public void keyTyped(KeyEvent e) {
int mask = e.getModifiers();
if ((mask & ~InputEvent.SHIFT_MASK) != 0) return;
char c = e.getKeyChar();
int cols = hex.getMeasures().getColumnCount();
switch (c) {
case ' ':
if (cursor >= 0) setDot(cursor + 1, (mask & InputEvent.SHIFT_MASK) != 0);
break;
case '\n':
if (cursor >= 0) setDot(cursor + cols, (mask & InputEvent.SHIFT_MASK) != 0);
break;
case '\u0008': case '\u007f':
hex.delete();
// setDot(cursor - 1, (mask & InputEvent.SHIFT_MASK) != 0);
break;
default:
int digit = Character.digit(e.getKeyChar(), 16);
if (digit >= 0) {
HexModel model = hex.getModel();
if (model != null && cursor >= model.getFirstOffset()
&& cursor <= model.getLastOffset()) {
int curValue = model.get(cursor);
int newValue = 16 * curValue + digit;
model.set(cursor, newValue);
}
}
}
}
public void keyPressed(KeyEvent e) {
int cols = hex.getMeasures().getColumnCount();
int rows;
boolean shift = (e.getModifiers() & InputEvent.SHIFT_MASK) != 0;
switch (e.getKeyCode()) {
case KeyEvent.VK_UP: if (cursor >= cols) setDot(cursor - cols, shift); break;
case KeyEvent.VK_LEFT: if (cursor >= 1) setDot(cursor - 1, shift); break;
case KeyEvent.VK_DOWN:
if (cursor >= hex.getModel().getFirstOffset() && cursor <= hex.getModel().getLastOffset() - cols) {
setDot(cursor + cols, shift);
}
break;
case KeyEvent.VK_RIGHT:
if (cursor >= hex.getModel().getFirstOffset() && cursor <= hex.getModel().getLastOffset() - 1) {
setDot(cursor + 1, shift);
}
break;
case KeyEvent.VK_HOME:
if (cursor >= 0) {
int dist = (int) (cursor % cols);
if (dist == 0) setDot(0, shift);
else setDot(cursor - dist, shift); break;
}
case KeyEvent.VK_END:
if (cursor >= 0) {
HexModel model = hex.getModel();
long dest = (cursor / cols * cols) + cols - 1;
if (model != null) {
long end = model.getLastOffset();
if (dest > end || dest == cursor) dest = end;
setDot(dest, shift);
} else {
setDot(dest, shift);
}
}
break;
case KeyEvent.VK_PAGE_DOWN:
rows = hex.getVisibleRect().height / hex.getMeasures().getCellHeight();
if (rows > 2) rows--;
if (cursor >= 0) {
long max = hex.getModel().getLastOffset();
if (cursor + rows * cols <= max) {
setDot(cursor + rows * cols, shift);
} else {
long n = cursor;
while (n + cols < max) n += cols;
setDot(n, shift);
}
}
break;
case KeyEvent.VK_PAGE_UP:
rows = hex.getVisibleRect().height / hex.getMeasures().getCellHeight();
if (rows > 2) rows--;
if (cursor >= rows * cols) setDot(cursor - rows * cols, shift);
else if (cursor >= cols) setDot(cursor % cols, shift);
break;
}
}
public void keyReleased(KeyEvent e) { }
public void focusGained(FocusEvent e) {
expose(cursor, false);
}
public void focusLost(FocusEvent e) {
expose(cursor, false);
}
}
private static final Stroke CURSOR_STROKE = new BasicStroke(2.0f);
private HexEditor hex;
private ArrayList<ChangeListener> listeners;
private long mark;
private long cursor;
private Object highlight;
Caret(HexEditor hex) {
this.hex = hex;
this.listeners = new ArrayList<ChangeListener>();
this.cursor = -1;
Listener l = new Listener();
hex.addMouseListener(l);
hex.addMouseMotionListener(l);
hex.addKeyListener(l);
hex.addFocusListener(l);
InputMap imap = hex.getInputMap();
ActionMap amap = hex.getActionMap();
AbstractAction nullAction = new AbstractAction() {
public void actionPerformed(ActionEvent e) { }
};
String nullKey = "null";
amap.put(nullKey, nullAction);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_HOME, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_END, 0), nullKey);
imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), nullKey);
}
public void addChangeListener(ChangeListener l) {
listeners.add(l);
}
public void removeChangeListener(ChangeListener l) {
listeners.remove(l);
}
public long getMark() {
return mark;
}
public long getDot() {
return cursor;
}
public void setDot(long value, boolean keepMark) {
HexModel model = hex.getModel();
if (model == null || value < model.getFirstOffset()
|| value > model.getLastOffset()) {
value = -1;
}
if (cursor != value) {
long oldValue = cursor;
if (highlight != null) {
hex.getHighlighter().remove(highlight);
highlight = null;
}
if (!keepMark) {
mark = value;
} else if (mark != value) {
highlight = hex.getHighlighter().add(mark, value, SELECT_COLOR);
}
cursor = value;
expose(oldValue, false);
expose(value, true);
if (!listeners.isEmpty()) {
ChangeEvent event = new ChangeEvent(this);
for (ChangeListener l : listeners) {
l.stateChanged(event);
}
}
}
}
private void expose(long loc, boolean scrollTo) {
if (loc >= 0) {
Measures measures = hex.getMeasures();
int x = measures.toX(loc);
int y = measures.toY(loc);
int w = measures.getCellWidth();
int h = measures.getCellHeight();
hex.repaint(x - 1, y - 1, w + 2, h + 2);
if (scrollTo) {
hex.scrollRectToVisible(new Rectangle(x, y, w, h));
}
}
}
void paintForeground(Graphics g, long start, long end) {
if (cursor >= start && cursor < end && hex.isFocusOwner()) {
Measures measures = hex.getMeasures();
int x = measures.toX(cursor);
int y = measures.toY(cursor);
Graphics2D g2 = (Graphics2D) g;
Stroke oldStroke = g2.getStroke();
g2.setColor(hex.getForeground());
g2.setStroke(CURSOR_STROKE);
g2.drawRect(x, y, measures.getCellWidth() - 1,
measures.getCellHeight() - 1);
g2.setStroke(oldStroke);
}
}
}