[armedbear-cvs] r12734 - trunk/abcl/src/org/armedbear/lisp/java/swing
Mark Evenson
mevenson at common-lisp.net
Tue May 25 13:20:12 UTC 2010
Author: mevenson
Date: Tue May 25 09:20:11 2010
New Revision: 12734
Log:
REPLConsole provides a minimal Swing GUI Console with a REPL.
Orignally written by Alessio Stalla for Snow, but judged useful to
have in the base distribution as the point for embedding ABCL in other
tools (like Eclipse RCP elements for Protege).
Added:
trunk/abcl/src/org/armedbear/lisp/java/swing/
trunk/abcl/src/org/armedbear/lisp/java/swing/REPLConsole.java (contents, props changed)
Added: trunk/abcl/src/org/armedbear/lisp/java/swing/REPLConsole.java
==============================================================================
--- (empty file)
+++ trunk/abcl/src/org/armedbear/lisp/java/swing/REPLConsole.java Tue May 25 09:20:11 2010
@@ -0,0 +1,318 @@
+/*
+ * ConsoleDocument.java
+ *
+ * Copyright (C) 2008-2009 Alessio Stalla
+ *
+ * $Id$
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * As a special exception, the copyright holders of this library give you
+ * permission to link this library with independent modules to produce an
+ * executable, regardless of the license terms of these independent
+ * modules, and to copy and distribute the resulting executable under
+ * terms of your choice, provided that you also meet, for each linked
+ * independent module, the terms and conditions of the license of that
+ * module. An independent module is a module which is not derived from
+ * or based on this library. If you modify this library, you may extend
+ * this exception to your version of the library, but you are not
+ * obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+package org.armedbear.lisp.java.swing;
+
+import java.awt.Window;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.lang.RuntimeException;
+import java.io.Reader;
+import java.io.Writer;
+
+import javax.swing.JFrame;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.SwingUtilities;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.DefaultStyledDocument;
+import javax.swing.text.JTextComponent;
+import org.armedbear.lisp.Function;
+import org.armedbear.lisp.Interpreter;
+import org.armedbear.lisp.LispObject;
+import org.armedbear.lisp.LispThread;
+import org.armedbear.lisp.SpecialBindingsMark;
+import org.armedbear.lisp.Stream;
+import org.armedbear.lisp.Symbol;
+import org.armedbear.lisp.TwoWayStream;
+
+import static org.armedbear.lisp.Lisp.*;
+
+public class REPLConsole extends DefaultStyledDocument {
+
+ private StringBuffer inputBuffer = new StringBuffer();
+
+ private Reader reader = new Reader() {
+
+ @Override
+ public void close() throws RuntimeException {}
+
+ @Override
+ public synchronized int read(char[] cbuf, int off, int len) throws RuntimeException {
+ try {
+ int length = Math.min(inputBuffer.length(), len);
+ while(length <= 0) {
+ wait();
+ length = Math.min(inputBuffer.length(), len);
+ }
+ inputBuffer.getChars(0, length, cbuf, off);
+ inputBuffer.delete(0, length);
+ return length;
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ }
+ }
+ };
+
+ private Writer writer = new Writer() {
+
+ @Override
+ public void close() throws RuntimeException {}
+
+ @Override
+ public void flush() throws RuntimeException {}
+
+ @Override
+ public void write(final char[] cbuf, final int off, final int len) throws RuntimeException {
+ try {
+ final int insertOffs;
+ synchronized(reader) {
+ if(inputBuffer.toString().matches("^\\s*$")) {
+ int length = inputBuffer.length();
+ inputBuffer.delete(0, length);
+ }
+ insertOffs = getLength() - inputBuffer.length();
+ reader.notifyAll();
+ }
+ Runnable r = new Runnable() {
+ public void run() {
+ synchronized(reader) {
+ try {
+ superInsertString(insertOffs,
+ new String(cbuf, off, len),
+ null);
+ } catch(Exception e) {
+ assert(false); //BadLocationException should not happen here
+ }
+ }
+ }
+ };
+ SwingUtilities.invokeAndWait(r);
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ }
+ };
+
+ private boolean disposed = false;
+ private final Thread replThread;
+
+ public REPLConsole(LispObject replFunction) {
+ final LispObject replWrapper = makeReplWrapper(new Stream(Symbol.SYSTEM_STREAM, new BufferedReader(reader)),
+ new Stream(Symbol.SYSTEM_STREAM, new BufferedWriter(writer)),
+ replFunction);
+ replThread = new Thread("REPL-thread-" + System.identityHashCode(this)) {
+ public void run() {
+ while(true) {
+ replWrapper.execute();
+ yield();
+ }
+ }
+ };
+ replThread.start();
+ }
+
+ @Override
+ public void insertString(int offs, String str, AttributeSet a)
+ throws BadLocationException {
+ synchronized(reader) {
+ int bufferStart = getLength() - inputBuffer.length();
+ if(offs < bufferStart) {
+ throw new BadLocationException("Can only insert after " + bufferStart, offs);
+ }
+ superInsertString(offs, str, a);
+ inputBuffer.insert(offs - bufferStart, str);
+ if(processInputP(inputBuffer, str)) {
+ reader.notifyAll();
+ }
+ }
+ }
+
+ protected void superInsertString(int offs, String str, AttributeSet a)
+ throws BadLocationException {
+ super.insertString(offs, str, a);
+ }
+
+ /**
+ * Guaranteed to run with exclusive access to the buffer.
+ * @param sb NB sb MUST NOT be destructively modified!!
+ * @return
+ */
+ protected boolean processInputP(StringBuffer sb, String str) {
+ if(str.indexOf("\n") == -1) {
+ return false;
+ }
+ int parenCount = 0;
+ int len = sb.length();
+ for(int i = 0; i < len; i++) {
+ char c = sb.charAt(i);
+ if(c == '(') {
+ parenCount++;
+ } else if(c == ')') {
+ parenCount--;
+ if(parenCount == 0) {
+ return true;
+ }
+ }
+ }
+ return parenCount <= 0;
+ }
+
+ @Override
+ public void remove(int offs, int len) throws BadLocationException {
+ synchronized(reader) {
+ int bufferStart = getLength() - inputBuffer.length();
+ if(offs < bufferStart) {
+ throw new BadLocationException("Can only remove after " + bufferStart, offs);
+ }
+ super.remove(offs, len);
+ inputBuffer.delete(offs - bufferStart, offs - bufferStart + len);
+ }
+ }
+
+ public Reader getReader() {
+ return reader;
+ }
+
+ public Writer getWriter() {
+ return writer;
+ }
+
+ public void setupTextComponent(final JTextComponent txt) {
+ addDocumentListener(new DocumentListener() {
+
+ // @Override
+ public void changedUpdate(DocumentEvent e) {
+ }
+
+ // @Override
+ public void insertUpdate(DocumentEvent e) {
+ int len = getLength();
+ if(len - e.getLength() == e.getOffset()) { //The insert was at the end of the document
+ txt.setCaretPosition(getLength());
+ }
+ }
+
+ // @Override
+ public void removeUpdate(DocumentEvent e) {
+ }
+ });
+ txt.setCaretPosition(getLength());
+ }
+
+ public void dispose() {
+ disposed = true;
+ for(DocumentListener listener : getDocumentListeners()) {
+ removeDocumentListener(listener);
+ }
+ try {
+ reader.close();
+ writer.close();
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ replThread.interrupt(); //really?
+ }
+
+ private final LispObject debuggerHook = new Function() {
+
+ @Override
+ public LispObject execute(LispObject condition, LispObject debuggerHook) {
+ if(disposed) {
+ return PACKAGE_SYS.findSymbol("%DEBUGGER-HOOK-FUNCTION").execute(condition, debuggerHook);
+ } else {
+ return NIL;
+ }
+ }
+
+ };
+
+ public LispObject makeReplWrapper(final Stream in, final Stream out, final LispObject fn) {
+ return new Function() {
+ @Override
+ public LispObject execute() {
+ SpecialBindingsMark lastSpecialBinding = LispThread.currentThread().markSpecialBindings();
+ try {
+ TwoWayStream ioStream = new TwoWayStream(in, out);
+ LispThread.currentThread().bindSpecial(Symbol.DEBUGGER_HOOK, debuggerHook);
+ LispThread.currentThread().bindSpecial(Symbol.STANDARD_INPUT, in);
+ LispThread.currentThread().bindSpecial(Symbol.STANDARD_OUTPUT, out);
+ LispThread.currentThread().bindSpecial(Symbol.ERROR_OUTPUT, out);
+ LispThread.currentThread().bindSpecial(Symbol.TERMINAL_IO, ioStream);
+ LispThread.currentThread().bindSpecial(Symbol.DEBUG_IO, ioStream);
+ LispThread.currentThread().bindSpecial(Symbol.QUERY_IO, ioStream);
+ return fn.execute();
+ } finally {
+ LispThread.currentThread().resetSpecialBindings(lastSpecialBinding);
+ }
+ }
+
+ };
+ }
+
+ public void disposeOnClose(final Window parent) {
+ parent.addWindowListener(new WindowAdapter() {
+ @Override
+ public void windowClosing(WindowEvent e) {
+ dispose();
+ parent.removeWindowListener(this);
+ }
+ });
+ }
+
+ public static void main(String[] args) {
+ LispObject repl = null;
+ try {
+ repl = Interpreter.createInstance().eval("#'top-level::top-level-loop");
+ } catch (Throwable e) {
+ e.printStackTrace();
+ System.exit(1);
+ }
+ final REPLConsole d = new REPLConsole(repl);
+ final JTextComponent txt = new JTextArea(d);
+ d.setupTextComponent(txt);
+ JFrame f = new JFrame();
+ f.add(new JScrollPane(txt));
+ d.disposeOnClose(f);
+ f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
+ f.pack();
+ f.setVisible(true);
+ }
+
+}
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