Source/bindings/v8/WorkerScriptDebugServer.cpp

/*
 * Copyright (c) 2011 Google Inc. All rights reserved.
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#include "config.h"
#include "bindings/v8/WorkerScriptDebugServer.h"

#include "bindings/v8/V8ScriptRunner.h"
#include "core/inspector/ScriptDebugListener.h"
#include "core/inspector/WorkerDebuggerAgent.h"
#include "core/workers/WorkerGlobalScope.h"
#include "core/workers/WorkerThread.h"
#include <v8.h>
#include "wtf/MessageQueue.h"


namespace WebCore {

WorkerScriptDebugServer::WorkerScriptDebugServer(WorkerGlobalScope* workerGlobalScope, const String& mode)
    : ScriptDebugServer(v8::Isolate::GetCurrent())
    , m_listener(0)
    , m_workerGlobalScope(workerGlobalScope)
    , m_debuggerTaskMode(mode)
{
    ASSERT(m_isolate);
}

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

    ASSERT(!m_listener);
    m_listener = listener;

    ensureDebuggerScriptCompiled();
    v8::Local<v8::Object> debuggerScript = m_debuggerScript.newLocal(m_isolate);
    ASSERT(!debuggerScript->IsUndefined());
    v8::Debug::SetDebugEventListener2(&WorkerScriptDebugServer::v8DebugEventCallback, v8::External::New(this));

    v8::Handle<v8::Function> getScriptsFunction = v8::Local<v8::Function>::Cast(debuggerScript->Get(v8::String::NewSymbol("getWorkerScripts")));
    v8::Handle<v8::Value> value = V8ScriptRunner::callInternalFunction(getScriptsFunction, debuggerScript, 0, 0, m_isolate);
    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, m_isolate))));
}

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_workerGlobalScope->thread()->runLoop().runInMode(m_workerGlobalScope, m_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