content: /**
   *  Copyright (c) 2015-2017 Angelo ZERR.
   *  All rights reserved. This program and the accompanying materials
   *  are made available under the terms of the Eclipse Public License v1.0
   *  which accompanies this distribution, and is available at
   *  http://www.eclipse.org/legal/epl-v10.html
   *
   *  Contributors:
   *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
   */
  package ts.eclipse.ide.terminal.interpreter.internal;
  
  import java.util.Map;
  
  import org.eclipse.tm.terminal.view.core.interfaces.ITerminalServiceOutputStreamMonitorListener;
  import org.eclipse.tm.terminal.view.core.interfaces.constants.ITerminalsConnectorConstants;
  
  import ts.eclipse.ide.terminal.interpreter.ICommandInterpreter;
  import ts.eclipse.ide.terminal.interpreter.LineCommand;
  
  public class CommandInterpreterProcessor extends CommandTerminalTracker
  		implements ITerminalServiceOutputStreamMonitorListener {
  
  	private ICommandInterpreter interpreter;
  	private final String encoding;
  
  	public CommandInterpreterProcessor(Map<String, Object> properties) {
  		this.encoding = getInitialEncoding(properties);
  	}
  
  	@Override
  	public final void onContentReadFromStream(byte[] byteBuffer, int bytesRead) {
  		super.parse(byteBuffer, bytesRead, encoding);
  	}
  
  	/**
  	 * Returns the initial encoding when terminal is opened.
  	 * 
  	 * @param properties
  	 * @return the initial encoding when terminal is opened.
  	 */
  	private static String getInitialEncoding(Map<String, Object> properties) {
  		return (String) properties.get(ITerminalsConnectorConstants.PROP_ENCODING);
  	}
  
  	@Override
  	public void submitCommand(LineCommand lineCommand) {
  		super.submitCommand(lineCommand);
  		initializeInterpreter(lineCommand.getWorkingDir(), lineCommand.getCommand());
  	}
  
  	@Override
  	protected void executingCommand(String line, LineCommand lineCommand) {
  		super.executingCommand(line, lineCommand);
  		if (interpreter != null) {
  			interpreter.onTrace(line);
  		}
  	}
  
  	@Override
  	protected void terminateCommand(LineCommand lineCommand) {
  		if (interpreter != null) {
  			interpreter.execute(lineCommand.getNewWorkingDir());
  		}
  		interpreter = null;
  		// Execute here ancestor terminateCommand command which can executes an
  		// another command.
  		super.terminateCommand(lineCommand);
  	}
  
  	/**
  	 * Initialize interpreter if needed.
  	 * 
  	 * @param workingDir
  	 */
  	private void initializeInterpreter(String workingDir, String command) {
  		// Initialize interpreter if needed
  		if (interpreter == null) {
  			if (command != null) {
  				interpreter = CommandInterpreterManager.getInstance().createInterpreter(command.trim(), workingDir);				
  			}
  		}
  	}
  
  }
  