third_party/WebKit/Source/modules/compositorworker/CompositorWorkerGlobalScope.cpp

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "modules/compositorworker/CompositorWorkerGlobalScope.h"

#include "bindings/core/v8/SerializedScriptValue.h"
#include "core/workers/InProcessWorkerObjectProxy.h"
#include "core/workers/WorkerThreadStartupData.h"
#include "modules/EventTargetModules.h"
#include "modules/compositorworker/CompositorWorkerThread.h"

namespace blink {

CompositorWorkerGlobalScope* CompositorWorkerGlobalScope::create(CompositorWorkerThread* thread, PassOwnPtr<WorkerThreadStartupData> startupData, double timeOrigin)
{
    // Note: startupData is finalized on return. After the relevant parts has been
    // passed along to the created 'context'.
    CompositorWorkerGlobalScope* context = new CompositorWorkerGlobalScope(startupData->m_scriptURL, startupData->m_userAgent, thread, timeOrigin, std::move(startupData->m_starterOriginPrivilegeData), startupData->m_workerClients.release());
    context->applyContentSecurityPolicyFromVector(*startupData->m_contentSecurityPolicyHeaders);
    context->setAddressSpace(startupData->m_addressSpace);
    return context;
}

CompositorWorkerGlobalScope::CompositorWorkerGlobalScope(const KURL& url, const String& userAgent, CompositorWorkerThread* thread, double timeOrigin, PassOwnPtr<SecurityOrigin::PrivilegeData> starterOriginPrivilegeData, WorkerClients* workerClients)
    : WorkerGlobalScope(url, userAgent, thread, timeOrigin, std::move(starterOriginPrivilegeData), workerClients)
    , m_executingAnimationFrameCallbacks(false)
    , m_callbackCollection(this)
{
    CompositorProxyClient::from(clients())->setGlobalScope(this);
}

CompositorWorkerGlobalScope::~CompositorWorkerGlobalScope()
{
}

DEFINE_TRACE(CompositorWorkerGlobalScope)
{
    visitor->trace(m_callbackCollection);
    WorkerGlobalScope::trace(visitor);
}

const AtomicString& CompositorWorkerGlobalScope::interfaceName() const
{
    return EventTargetNames::CompositorWorkerGlobalScope;
}

void CompositorWorkerGlobalScope::postMessage(ExecutionContext* executionContext, PassRefPtr<SerializedScriptValue> message, const MessagePortArray& ports, ExceptionState& exceptionState)
{
    // Disentangle the port in preparation for sending it to the remote context.
    OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(executionContext, ports, exceptionState);
    if (exceptionState.hadException())
        return;
    thread()->workerObjectProxy().postMessageToWorkerObject(message, std::move(channels));
}

int CompositorWorkerGlobalScope::requestAnimationFrame(FrameRequestCallback* callback)
{
    const bool shouldSignal = !m_executingAnimationFrameCallbacks && m_callbackCollection.isEmpty();
    if (shouldSignal)
        CompositorProxyClient::from(clients())->requestAnimationFrame();
    return m_callbackCollection.registerCallback(callback);
}

void CompositorWorkerGlobalScope::cancelAnimationFrame(int id)
{
    m_callbackCollection.cancelCallback(id);
}

bool CompositorWorkerGlobalScope::executeAnimationFrameCallbacks(double highResTimeMs)
{
    TemporaryChange<bool> temporaryChange(m_executingAnimationFrameCallbacks, true);
    m_callbackCollection.executeCallbacks(highResTimeMs, highResTimeMs);
    return !m_callbackCollection.isEmpty();
}

CompositorWorkerThread* CompositorWorkerGlobalScope::thread() const
{
    return static_cast<CompositorWorkerThread*>(WorkerGlobalScope::thread());
}

} // namespace blink