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/*
* Copyright (C) 2013 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:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. 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,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* 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 "core/dom/custom/CustomElementScheduler.h"
#include "core/dom/Document.h"
#include "core/dom/Element.h"
#include "core/dom/custom/CustomElementCallbackDispatcher.h"
#include "core/dom/custom/CustomElementCallbackInvocation.h"
#include "core/dom/custom/CustomElementLifecycleCallbacks.h"
#include "core/dom/custom/CustomElementMicrotaskDispatcher.h"
#include "core/dom/custom/CustomElementMicrotaskImportStep.h"
#include "core/dom/custom/CustomElementMicrotaskResolutionStep.h"
#include "core/dom/custom/CustomElementRegistrationContext.h"
#include "core/html/imports/HTMLImportChild.h"
namespace WebCore {
DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CustomElementScheduler)
void CustomElementScheduler::scheduleCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtrWillBeRawPtr<Element> element, CustomElementLifecycleCallbacks::CallbackType type)
{
ASSERT(type != CustomElementLifecycleCallbacks::AttributeChanged);
if (!callbacks->hasCallback(type))
return;
CustomElementCallbackQueue& queue = instance().schedule(element);
queue.append(CustomElementCallbackInvocation::createInvocation(callbacks, type));
}
void CustomElementScheduler::scheduleAttributeChangedCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtrWillBeRawPtr<Element> element, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue)
{
if (!callbacks->hasCallback(CustomElementLifecycleCallbacks::AttributeChanged))
return;
CustomElementCallbackQueue& queue = instance().schedule(element);
queue.append(CustomElementCallbackInvocation::createAttributeChangedInvocation(callbacks, name, oldValue, newValue));
}
void CustomElementScheduler::resolveOrScheduleResolution(PassRefPtrWillBeRawPtr<CustomElementRegistrationContext> context, PassRefPtrWillBeRawPtr<Element> element, const CustomElementDescriptor& descriptor)
{
if (CustomElementCallbackDispatcher::inCallbackDeliveryScope()) {
context->resolve(element.get(), descriptor);
return;
}
HTMLImportLoader* loader = element->document().importLoader();
OwnPtrWillBeRawPtr<CustomElementMicrotaskResolutionStep> step = CustomElementMicrotaskResolutionStep::create(context, element, descriptor);
CustomElementMicrotaskDispatcher::instance().enqueue(loader, step.release());
}
CustomElementMicrotaskImportStep* CustomElementScheduler::scheduleImport(HTMLImportChild* import)
{
ASSERT(!import->isDone());
ASSERT(import->parent());
// Ownership of the new step is transferred to the parent
// processing step, or the base queue.
OwnPtrWillBeRawPtr<CustomElementMicrotaskImportStep> step = CustomElementMicrotaskImportStep::create(import);
CustomElementMicrotaskImportStep* rawStep = step.get();
CustomElementMicrotaskDispatcher::instance().enqueue(import->parent()->loader(), step.release(), import->isSync());
return rawStep;
}
CustomElementScheduler& CustomElementScheduler::instance()
{
DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<CustomElementScheduler>, instance, (adoptPtrWillBeNoop (new CustomElementScheduler())));
return *instance;
}
CustomElementCallbackQueue& CustomElementScheduler::ensureCallbackQueue(PassRefPtrWillBeRawPtr<Element> element)
{
ElementCallbackQueueMap::ValueType* it = m_elementCallbackQueueMap.add(element.get(), nullptr).storedValue;
if (!it->value)
it->value = CustomElementCallbackQueue::create(element);
return *it->value.get();
}
void CustomElementScheduler::callbackDispatcherDidFinish()
{
if (CustomElementMicrotaskDispatcher::instance().elementQueueIsEmpty())
instance().clearElementCallbackQueueMap();
}
void CustomElementScheduler::microtaskDispatcherDidFinish()
{
ASSERT(!CustomElementCallbackDispatcher::inCallbackDeliveryScope());
instance().clearElementCallbackQueueMap();
}
void CustomElementScheduler::clearElementCallbackQueueMap()
{
ElementCallbackQueueMap emptyMap;
m_elementCallbackQueueMap.swap(emptyMap);
}
// Finds or creates the callback queue for element.
CustomElementCallbackQueue& CustomElementScheduler::schedule(PassRefPtrWillBeRawPtr<Element> passElement)
{
RefPtrWillBeRawPtr<Element> element(passElement);
CustomElementCallbackQueue& callbackQueue = ensureCallbackQueue(element);
if (callbackQueue.inCreatedCallback()) {
// Don't move it. Authors use the createdCallback like a
// constructor. By not moving it, the createdCallback
// completes before any other callbacks are entered for this
// element.
return callbackQueue;
}
if (CustomElementCallbackDispatcher::inCallbackDeliveryScope()) {
// The processing stack is active.
CustomElementCallbackDispatcher::instance().enqueue(&callbackQueue);
return callbackQueue;
}
CustomElementMicrotaskDispatcher::instance().enqueue(&callbackQueue);
return callbackQueue;
}
void CustomElementScheduler::trace(Visitor* visitor)
{
visitor->trace(m_elementCallbackQueueMap);
}
} // namespace WebCore
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