/*
 * Created on 23.11.2004
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package net.sourceforge.phpeclipse.xdebug.core;

import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.core.model.IThread;

/**
 * @author Axel
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class XDebugThread extends XDebugElement implements IThread {
	
	/**
	 * Breakpoints this thread is suspended at or <code>null</code>
	 * if none.
	 */
	private IBreakpoint[] fBreakpoints;
	
	/**
	 * Whether this thread is stepping
	 */
	private boolean fStepping = false;
	
	/**
	 * Constructs a new thread for the given target
	 * 
	 * @param target VM
	 */
	public XDebugThread(XDebugTarget target) {
		super(target);
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IThread#getStackFrames()
	 */
	public IStackFrame[] getStackFrames() throws DebugException {
		if (isSuspended()) {
			return ((XDebugTarget)getDebugTarget()).getStackFrames();
		} else {
			return new IStackFrame[0];
		}
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IThread#hasStackFrames()
	 */
	public boolean hasStackFrames() throws DebugException {
		return isSuspended();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IThread#getPriority()
	 */
	public int getPriority() throws DebugException {
		return 0;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IThread#getTopStackFrame()
	 */
	public IStackFrame getTopStackFrame() throws DebugException {
		IStackFrame[] frames = getStackFrames();
		if (frames.length > 0) {
			return frames[0];
		}
		return null;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IThread#getName()
	 */
	public String getName() throws DebugException {
		return "Thread[1]";
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IThread#getBreakpoints()
	 */
	public IBreakpoint[] getBreakpoints() {
		if (fBreakpoints == null) {
			return new IBreakpoint[0];
		}
		return fBreakpoints;
	}
	/**
	 * Sets the breakpoints this thread is suspended at, or <code>null</code>
	 * if none.
	 * 
	 * @param breakpoints the breakpoints this thread is suspended at, or <code>null</code>
	 * if none
	 */
	protected void setBreakpoints(IBreakpoint[] breakpoints) {
		fBreakpoints = breakpoints;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#canResume()
	 */
	public boolean canResume() {
		return isSuspended();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#canSuspend()
	 */
	public boolean canSuspend() {
		return !isSuspended();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#isSuspended()
	 */
	public boolean isSuspended() {
		return getDebugTarget().isSuspended();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#resume()
	 */
	public void resume() throws DebugException {
		getDebugTarget().resume();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#suspend()
	 */
	public void suspend() throws DebugException {
		getDebugTarget().suspend();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#canStepInto()
	 */
	public boolean canStepInto() {
		return false;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#canStepOver()
	 */
	public boolean canStepOver() {
		return isSuspended();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#canStepReturn()
	 */
	public boolean canStepReturn() {
		return false;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#isStepping()
	 */
	public boolean isStepping() {
		return fStepping;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#stepInto()
	 */
	public void stepInto() throws DebugException {
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#stepOver()
	 */
	public void stepOver() throws DebugException {
		((XDebugTarget)getDebugTarget()).step();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#stepReturn()
	 */
	public void stepReturn() throws DebugException {
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ITerminate#canTerminate()
	 */
	public boolean canTerminate() {
		return !isTerminated();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ITerminate#isTerminated()
	 */
	public boolean isTerminated() {
		return getDebugTarget().isTerminated();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ITerminate#terminate()
	 */
	public void terminate() throws DebugException {
		getDebugTarget().terminate();
	}
	
	/**
	 * Sets whether this thread is stepping
	 * 
	 * @param stepping whether stepping
	 */
	protected void setStepping(boolean stepping) {
		fStepping = stepping;
	}
}