bundles/org.eclipse.e4.languages.javascript.debug/src/org/eclipse/e4/languages/javascript/debug/rhino/ThreadData.java

package org.eclipse.e4.languages.javascript.debug.rhino;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.eclipse.e4.languages.javascript.debug.connect.EventPacket;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.debug.DebugFrame;
import org.mozilla.javascript.debug.DebuggableScript;

public class ThreadData {

	private final LinkedList contexts = new LinkedList();
	private final Long threadId;
	private final RhinoDebugger debugger;

	private long currentContextId = 0L;
	private long currentFrameId = 0L;

	public ThreadData(Long threadId, RhinoDebugger debugger) {
		this.threadId = threadId;
		this.debugger = debugger;
	}

	public synchronized Object toJSON() {
		Map result = new HashMap();
		result.put("threadId", threadId);
		Context top = (Context) contexts.getFirst();
		result.put("state", top == null ? "running" : ((ContextData) top.getDebuggerContextData()).getState());
		ArrayList contextIds = new ArrayList(contexts.size());
		for (Iterator iterator = contexts.iterator(); iterator.hasNext();) {
			Context context = (Context) iterator.next();
			ContextData data = (ContextData) context.getDebuggerContextData();
			contextIds.add(data.getId());
		}
		result.put("contexts", contextIds);
		return result;
	}

	public synchronized void contextCreated(Context context) {
		context.setGeneratingDebug(true);
		context.setOptimizationLevel(-1);
		ContextData contextData = new ContextData(threadId, new Long(currentContextId++), debugger);
		context.setDebugger(debugger, contextData);
		contexts.push(context);
		if (contexts.size() == 1)
			sendThreadEvent("enter");
	}

	public synchronized void contextReleased(Context context) {
		contexts.pop();
		if (contexts.isEmpty())
			sendThreadEvent("exit");
	}

	private void sendThreadEvent(String type) {
		EventPacket threadEvent = new EventPacket("thread");
		Map body = threadEvent.getBody();
		body.put("type", type);
		body.put("threadId", threadId);
		debugger.sendEvent(threadEvent);
	}

	public synchronized boolean hasContext() {
		return !contexts.isEmpty();
	}

	public synchronized List getFrameIds() {
		ArrayList result = new ArrayList(contexts.size());
		for (Iterator iterator = contexts.iterator(); iterator.hasNext();) {
			Context context = (Context) iterator.next();
			ContextData data = (ContextData) context.getDebuggerContextData();
			result.addAll(data.getFrameIds());
		}
		return result;
	}

	public synchronized void suspend() {
		Context context = (Context) contexts.getFirst();
		if (context == null)
			return;
		ContextData data = (ContextData) context.getDebuggerContextData();
		data.suspend();
	}

	public synchronized void resume(String stepType) {
		Context context = (Context) contexts.getFirst();
		if (context == null)
			return;
		ContextData data = (ContextData) context.getDebuggerContextData();
		data.resume(stepType);
	}

	public DebugFrameImpl getFrame(Long frameId) {
		for (Iterator iterator = contexts.iterator(); iterator.hasNext();) {
			Context context = (Context) iterator.next();
			ContextData data = (ContextData) context.getDebuggerContextData();
			DebugFrameImpl frame = data.getFrame(frameId);
			if (frame != null)
				return frame;
		}
		return null;
	}

	public synchronized DebugFrame getFrame(Context context, DebuggableScript debuggableScript, ScriptImpl script) {
		return new DebugFrameImpl(new Long(currentFrameId++), context, debuggableScript, script);
	}
}