/*
* Copyright (C) 2009 the original author(s).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* MODIFICATIONS: methods to deal with wrapping the output stream.
*/
package scala.tools.jline;
import org.fusesource.jansi.AnsiConsole;
import org.fusesource.jansi.AnsiOutputStream;
import org.fusesource.jansi.WindowsAnsiOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
/**
* ANSI-supported {@link WindowsTerminal}.
*
* @since 2.0
*/
public class AnsiWindowsTerminal
extends WindowsTerminal
{
private final boolean ansiSupported = detectAnsiSupport();
@Override
public OutputStream wrapOutIfNeeded(OutputStream out) {
return wrapOutputStream(out);
}
/**
* Returns an ansi output stream handler. We return whatever was
* passed if we determine we cannot handle ansi based on Kernel32 calls.
*
* @return an @{link AltWindowAnsiOutputStream} instance or the passed
* stream.
*/
private static OutputStream wrapOutputStream(final OutputStream stream) {
String os = System.getProperty("os.name");
if( os.startsWith("Windows") ) {
// On windows we know the console does not interpret ANSI codes..
try {
return new WindowsAnsiOutputStream(stream);
} catch (Throwable ignore) {
// this happens when JNA is not in the path.. or
// this happens when the stdout is being redirected to a file.
}
// Use the ANSIOutputStream to strip out the ANSI escape sequences.
return new AnsiOutputStream(stream);
}
return stream;
}
private static boolean detectAnsiSupport() {
OutputStream out = AnsiConsole.wrapOutputStream(new ByteArrayOutputStream());
try {
out.close();
}
catch (Exception e) {
// ignore;
}
return out instanceof WindowsAnsiOutputStream;
}
public AnsiWindowsTerminal() throws Exception {
super();
}
@Override
public boolean isAnsiSupported() {
return ansiSupported;
}
@Override
public boolean hasWeirdWrap() {
return false;
}
}