forked from Apple-2-Tools/jace
167 lines
5.8 KiB
Java
167 lines
5.8 KiB
Java
/*
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* Copyright (C) 2012 Brendan Robert (BLuRry) brendan.robert@gmail.com.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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package jace.hardware;
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import jace.apple2e.SoftSwitches;
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import jace.core.Computer;
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import jace.core.Keyboard;
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import jace.core.RAMEvent;
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import jace.core.RAMListener;
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import java.awt.Rectangle;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/**
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* Attempt at adding accessibility by redirecting screen/keyboard traffic to
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* stdout/stdin of the console. Doesn't work well, unfortunately.
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*
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* @author Brendan Robert (BLuRry) brendan.robert@gmail.com
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*/
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public class ConsoleProbe {
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public static boolean enabled = true;
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public String[] lastScreen = new String[24];
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public List<Rectangle> regions = new ArrayList<Rectangle>();
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private RAMListener textListener;
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public static long lastChange;
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public static long updateDelay = 100L;
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public static boolean readerActive = false;
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public Computer computer;
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private Thread keyReaderThread;
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public void init(final Computer c) {
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computer = c;
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enabled = true;
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keyReaderThread = new Thread(new KeyReader());
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keyReaderThread.setName("Console probe key reader");
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keyReaderThread.start();
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textListener = new RAMListener(RAMEvent.TYPE.WRITE, RAMEvent.SCOPE.RANGE, RAMEvent.VALUE.ANY) {
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@Override
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protected void doConfig() {
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setScopeStart(0x0400);
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setScopeEnd(0x0BFF);
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}
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@Override
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protected void doEvent(RAMEvent e) {
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if (e.getAddress() < 0x0800 && SoftSwitches.PAGE2.isOn()) {
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return;
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}
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if (SoftSwitches.TEXT.isOff()) {
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if (SoftSwitches.MIXED.isOn()) {
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handleMixedMode();
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}
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} else {
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handleTextMode();
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}
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}
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private void handleMixedMode() {
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handleTextMode();
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}
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private void handleTextMode() {
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lastChange = System.currentTimeMillis();
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if (readerActive) {
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return;
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}
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Thread t = new Thread(new ScreenReader());
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t.start();
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}
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};
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c.getMemory().addListener(textListener);
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}
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public static synchronized void performRead() {
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}
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public void shutdown() {
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enabled = false;
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if (textListener != null) {
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computer.getMemory().removeListener(textListener);
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}
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if (keyReaderThread != null && keyReaderThread.isAlive()) {
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try {
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keyReaderThread.join();
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} catch (InterruptedException ex) {
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Logger.getLogger(ConsoleProbe.class.getName()).log(Level.SEVERE, null, ex);
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}
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}
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}
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public static class ScreenReader implements Runnable {
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public void run() {
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readerActive = true;
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try {
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// Keep sleeping until there have been no more screen changes during the specified delay period
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// It is possible that the lastChange will keep being updated while in this loop
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// That is both expected and the reason this is a loop!
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long delay = 0;
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while (System.currentTimeMillis() - lastChange <= updateDelay) {
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delay = updateDelay - System.currentTimeMillis() - lastChange;
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if (delay > 0) {
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Thread.sleep(delay);
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}
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}
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} catch (InterruptedException ex) {
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Logger.getLogger(ConsoleProbe.class.getName()).log(Level.SEVERE, null, ex);
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}
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// Signal that we're off to go read the screen (and any additional update will need to spawn the thread again)
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readerActive = false;
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performRead();
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}
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}
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public static class KeyReader implements Runnable {
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public Computer c;
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public void run() {
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while (true) {
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try {
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while (enabled && (System.in.available() == 0 || Keyboard.readState() < 0)) {
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try {
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Thread.sleep(1);
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} catch (InterruptedException ex) {
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System.out.println(ex.getMessage());
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Logger.getLogger(ConsoleProbe.class.getName()).log(Level.SEVERE, null, ex);
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}
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}
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if (!enabled) {
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return;
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}
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int ch = System.in.read();
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if (ch == 10) {
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ch = 13;
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}
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Keyboard.pressKey((byte) ch);
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} catch (IOException ex) {
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System.out.println(ex.getMessage());
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Logger.getLogger(ConsoleProbe.class.getName()).log(Level.SEVERE, null, ex);
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}
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}
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}
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}
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}
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