WorkerScriptDebugServer.cpp   [plain text]

/*
 * Copyright (c) 2011 Google Inc. All rights reserved.
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#include "config.h"
#include "WorkerScriptDebugServer.h"

#if ENABLE(JAVASCRIPT_DEBUGGER) && ENABLE(WORKERS)

#include "ScriptDebugListener.h"
#include "WorkerContext.h"
#include "WorkerContextExecutionProxy.h"
#include "WorkerDebuggerAgent.h"
#include "WorkerThread.h"
#include <v8.h>
#include <wtf/MessageQueue.h>


namespace WebCore {

WorkerScriptDebugServer::WorkerScriptDebugServer(WorkerContext* workerContext)
    : ScriptDebugServer()
    , m_listener(0)
    , m_workerContext(workerContext)
    , m_isolate(v8::Isolate::GetCurrent())
{
    ASSERT(m_isolate);
}

void WorkerScriptDebugServer::addListener(ScriptDebugListener* listener)
{
    v8::HandleScope scope;
    v8::Local<v8::Context> debuggerContext = v8::Debug::GetDebugContext();
    v8::Context::Scope contextScope(debuggerContext);

    ASSERT(!m_listener);
    m_listener = listener;

    ensureDebuggerScriptCompiled();
    ASSERT(!m_debuggerScript.get()->IsUndefined());
    v8::Debug::SetDebugEventListener2(&WorkerScriptDebugServer::v8DebugEventCallback, v8::External::New(this));
    
    // TODO: Should we remove |proxy|? It looks like unused now.
    WorkerContextExecutionProxy* proxy = m_workerContext->script()->proxy();
    if (!proxy)
        return;

    v8::Handle<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(m_debuggerScript.get()->Get(v8::String::New("getWorkerScripts")));
    v8::Handle<v8::Value> argv[] = { v8::Handle<v8::Value>() };
    v8::Handle<v8::Value> value = getScriptsFunction->Call(m_debuggerScript.get(), 0, argv);
    if (value.IsEmpty())
        return;
    ASSERT(!value->IsUndefined() && value->IsArray());
    v8::Handle<v8::Array> scriptsArray = v8::Handle<v8::Array>::Cast(value);
    for (unsigned i = 0; i < scriptsArray->Length(); ++i)
        dispatchDidParseSource(listener, v8::Handle<v8::Object>::Cast(scriptsArray->Get(v8::Integer::New(i))));
}

void WorkerScriptDebugServer::removeListener(ScriptDebugListener* listener)
{
    ASSERT(m_listener == listener);
    continueProgram();
    m_listener = 0;
    v8::Debug::SetDebugEventListener2(0);
}

void WorkerScriptDebugServer::interruptAndRunTask(PassOwnPtr<Task> task)
{
    interruptAndRun(task, m_isolate);
}

ScriptDebugListener* WorkerScriptDebugServer::getDebugListenerForContext(v8::Handle<v8::Context>)
{
    // There is only one worker context in isolate.
    return m_listener;
}

void WorkerScriptDebugServer::runMessageLoopOnPause(v8::Handle<v8::Context>)
{
    MessageQueueWaitResult result;
    do {
        result = m_workerContext->thread()->runLoop().runInMode(m_workerContext, WorkerDebuggerAgent::debuggerTaskMode);
    // Keep waiting until execution is resumed.
    } while (result == MessageQueueMessageReceived && isPaused());
    
    // The listener may have been removed in the nested loop.
    if (m_listener)
        m_listener->didContinue();
}

void WorkerScriptDebugServer::quitMessageLoopOnPause()
{
    // Nothing to do here in case of workers since runMessageLoopOnPause will check for paused state after each debugger command.
}

} // namespace WebCore

#endif // ENABLE(JAVASCRIPT_DEBUGGER) && ENABLE(WORKERS)