org.spoofax.interpreter.ui.SpoofaxConsole.java Source code

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Here is the source code for org.spoofax.interpreter.ui.SpoofaxConsole.java

Source

/*
 * Copyright (c) 2011, Karl Trygve Kalleberg <karltk at strategoxt dot org>
 *
 * Licensed under the GNU Lesser General Public License, v2.1
 */
package org.spoofax.interpreter.ui;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Writer;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.console.IOConsole;
import org.eclipse.ui.console.IOConsoleOutputStream;
import org.spoofax.interpreter.library.IOAgent;

public class SpoofaxConsole extends IOConsole implements Runnable {

    private boolean isDisposed;

    public static final String CONSOLE_NAME = "Spoofax Console";

    public static class ConsoleIOAgent extends IOAgent {

        final PrintWriter out;
        final PrintWriter err;

        public ConsoleIOAgent(IOConsoleOutputStream out, IOConsoleOutputStream err) {
            this.out = new PrintWriter(out);
            this.err = new PrintWriter(err);
        }

        @Override
        public Writer getWriter(int fd) {
            if (fd == CONST_STDERR) {
                return err;
            } else if (fd == CONST_STDOUT) {
                return out;
            }
            return super.getWriter(fd);
        }

    }

    @Override
    protected void dispose() {
        super.dispose();
        this.isDisposed = true;
    }

    public boolean isDisposed() {
        return isDisposed;
    }

    public SpoofaxConsole() {
        super(CONSOLE_NAME, ImageDescriptor.getMissingImageDescriptor());
        Thread t = new Thread(this);
        t.start();
    }

    @Override
    public String getName() {
        return "Spoofax Console";
    }

    @Override
    public void run() {
        try {
            final IOConsoleOutputStream err = newOutputStream();
            final IOConsoleOutputStream out = newOutputStream();
            final IOConsoleOutputStream prompt = newOutputStream();

            Display.getDefault().syncExec(new Runnable() {

                @Override
                public void run() {
                    err.setColor(new Color(null, 255, 0, 0));
                    out.setColor(new Color(null, 234, 123, 195));
                    prompt.setColor(new Color(null, 95, 200, 23));
                }
            });

            ConsoleIOAgent ioAgent = new ConsoleIOAgent(out, err);
            SpoofaxInterpreter intp = new SpoofaxInterpreter(ioAgent);
            BufferedReader br = new BufferedReader(new InputStreamReader(getInputStream()));
            for (;;) {
                try {
                    prompt.write("> ");
                    prompt.flush();

                    String line = br.readLine();
                    if (line == null || !intp.eval(line))
                        break;
                } catch (IOException e) {
                    // assume that the console has been closed
                    break;
                }
            }
        } catch (Exception e) {
            InterpreterPlugin.logError("Fatal error in interpreter thread", e);
        }
    }

}