/*

 * Copyright (C) 2007-2009 Google Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 * notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 * copyright notice, this list of conditions and the following disclaimer

 * in the documentation and/or other materials provided with the

 * distribution.

 *     * Neither the name of Google Inc. nor the names of its

 * contributors may be used to endorse or promote products derived from

 * this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "ScheduledAction.h"

#include "Document.h"

#include "ScriptExecutionContext.h"

#include "ScriptSourceCode.h"

#include "ScriptValue.h"

#include "V8Binding.h"

#include "V8Proxy.h"

#include "WorkerContext.h"

#include "WorkerContextExecutionProxy.h"

#include "WorkerThread.h"

namespace WebCore {

ScheduledAction::ScheduledAction(v8::Handle<v8::Context> context, v8::Handle<v8::Function> func, int argc, v8::Handle<v8::Value> argv[])

    : m_context(context)

    , m_code(String(), KURL(), 0)

{

    m_function = v8::Persistent<v8::Function>::New(func);

#ifndef NDEBUG

    V8GCController::registerGlobalHandle(SCHEDULED_ACTION, this, m_function);

#endif

    m_argc = argc;

    if (argc > 0) {

        m_argv = new v8::Persistent<v8::Value>[argc];

        for (int i = 0; i < argc; i++) {

            m_argv[i] = v8::Persistent<v8::Value>::New(argv[i]);

#ifndef NDEBUG

    V8GCController::registerGlobalHandle(SCHEDULED_ACTION, this, m_argv[i]);

#endif

        }

    } else

        m_argv = 0;

}

ScheduledAction::~ScheduledAction()

{

    if (m_function.IsEmpty())

        return;

#ifndef NDEBUG

    V8GCController::unregisterGlobalHandle(this, m_function);

#endif

    m_function.Dispose();

    for (int i = 0; i < m_argc; i++) {

#ifndef NDEBUG

        V8GCController::unregisterGlobalHandle(this, m_argv[i]);

#endif

        m_argv[i].Dispose();

    }

    if (m_argc > 0)

        delete[] m_argv;

}

void ScheduledAction::execute(ScriptExecutionContext* context)

{

    V8Proxy* proxy = V8Proxy::retrieve(context);

    if (proxy)

        execute(proxy);

#if ENABLE(WORKERS)

    else if (context->isWorkerContext())

        execute(static_cast<WorkerContext*>(context));

#endif

    // It's possible that Javascript is disabled and that we have neither a V8Proxy

    // nor a WorkerContext.  Do nothing in that case.

}

void ScheduledAction::execute(V8Proxy* proxy)

{

    ASSERT(proxy);

    v8::HandleScope handleScope;

    v8::Handle<v8::Context> v8Context = v8::Local<v8::Context>::New(m_context.get());

    if (v8Context.IsEmpty())

        return; // JS may not be enabled.

    v8::Context::Scope scope(v8Context);

    proxy->setTimerCallback(true);

    // FIXME: Need to implement timeouts for preempting a long-running script.

    if (!m_function.IsEmpty() && m_function->IsFunction()) {

        proxy->callFunction(v8::Persistent<v8::Function>::Cast(m_function), v8Context->Global(), m_argc, m_argv);

        Document::updateStyleForAllDocuments();

    } else

        proxy->evaluate(m_code, 0);

    proxy->setTimerCallback(false);

}

#if ENABLE(WORKERS)

void ScheduledAction::execute(WorkerContext* workerContext)

{

    // In a Worker, the execution should always happen on a worker thread.

    ASSERT(workerContext->thread()->threadID() == currentThread());

    WorkerScriptController* scriptController = workerContext->script();

    if (!m_function.IsEmpty() && m_function->IsFunction()) {

        v8::HandleScope handleScope;

        v8::Handle<v8::Context> v8Context = v8::Local<v8::Context>::New(m_context.get());

        ASSERT(!v8Context.IsEmpty());

        v8::Context::Scope scope(v8Context);

        m_function->Call(v8Context->Global(), m_argc, m_argv);

    } else

        scriptController->evaluate(m_code);

}

#endif

} // namespace WebCore