| /* |
| * 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/CustomElementMicrotaskQueue.h" |
| #include "core/dom/custom/CustomElementMicrotaskResolutionStep.h" |
| #include "core/dom/custom/CustomElementRegistrationContext.h" |
| #include "core/html/imports/HTMLImportChild.h" |
| #include "core/html/imports/HTMLImportLoader.h" |
| |
| namespace WebCore { |
| |
| class HTMLImport; |
| |
| void CustomElementScheduler::scheduleCallback(PassRefPtr<CustomElementLifecycleCallbacks> callbacks, PassRefPtr<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, PassRefPtr<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(PassRefPtr<CustomElementRegistrationContext> context, PassRefPtr<Element> element, const CustomElementDescriptor& descriptor) |
| { |
| if (CustomElementCallbackDispatcher::inCallbackDeliveryScope()) { |
| context->resolve(element.get(), descriptor); |
| return; |
| } |
| |
| HTMLImportLoader* loader = element->document().importLoader(); |
| OwnPtr<CustomElementMicrotaskResolutionStep> step = CustomElementMicrotaskResolutionStep::create(context, element, descriptor); |
| CustomElementMicrotaskDispatcher::instance().enqueue(loader, step.release()); |
| } |
| |
| CustomElementMicrotaskImportStep* CustomElementScheduler::scheduleImport(HTMLImportChild* import) |
| { |
| ASSERT(!import->isDone()); |
| ASSERT(import->parent()); |
| |
| OwnPtr<CustomElementMicrotaskImportStep> step = CustomElementMicrotaskImportStep::create(import->loader()->microtaskQueue()); |
| CustomElementMicrotaskImportStep* rawStep = step.get(); |
| |
| // Ownership of the new step is transferred to the parent |
| // processing step, or the base queue. |
| CustomElementMicrotaskDispatcher::instance().enqueue(import->parent()->loader(), step.release()); |
| |
| return rawStep; |
| } |
| |
| CustomElementScheduler& CustomElementScheduler::instance() |
| { |
| DEFINE_STATIC_LOCAL(CustomElementScheduler, instance, ()); |
| return instance; |
| } |
| |
| CustomElementCallbackQueue& CustomElementScheduler::ensureCallbackQueue(PassRefPtr<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(PassRefPtr<Element> passElement) |
| { |
| RefPtr<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; |
| } |
| |
| } // namespace WebCore |