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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 "third_party/blink/renderer/core/html/custom/v0_custom_element_processing_stack.h"
#include "third_party/blink/renderer/core/html/custom/v0_custom_element_callback_queue.h"
#include "third_party/blink/renderer/core/html/custom/v0_custom_element_scheduler.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
namespace blink {
wtf_size_t V0CustomElementProcessingStack::element_queue_start_ = 0;
// The base of the stack has a null sentinel value.
wtf_size_t V0CustomElementProcessingStack::element_queue_end_ = kNumSentinels;
V0CustomElementProcessingStack& V0CustomElementProcessingStack::Instance() {
DEFINE_STATIC_LOCAL(Persistent<V0CustomElementProcessingStack>, instance,
(new V0CustomElementProcessingStack));
return *instance;
}
// Dispatches callbacks when popping the processing stack.
void V0CustomElementProcessingStack::ProcessElementQueueAndPop() {
Instance().ProcessElementQueueAndPop(element_queue_start_,
element_queue_end_);
}
void V0CustomElementProcessingStack::ProcessElementQueueAndPop(wtf_size_t start,
wtf_size_t end) {
DCHECK(IsMainThread());
V0CustomElementCallbackQueue::ElementQueueId this_queue =
CurrentElementQueue();
for (wtf_size_t i = start; i < end; ++i) {
{
// The created callback may schedule entered document
// callbacks.
CallbackDeliveryScope delivery_scope;
flattened_processing_stack_[i]->ProcessInElementQueue(this_queue);
}
DCHECK_EQ(start, element_queue_start_);
DCHECK_EQ(end, element_queue_end_);
}
// Pop the element queue from the processing stack
flattened_processing_stack_.resize(start);
element_queue_end_ = start;
if (element_queue_start_ == kNumSentinels)
V0CustomElementScheduler::CallbackDispatcherDidFinish();
}
void V0CustomElementProcessingStack::Enqueue(
V0CustomElementCallbackQueue* callback_queue) {
DCHECK(InCallbackDeliveryScope());
if (callback_queue->Owner() == CurrentElementQueue())
return;
callback_queue->SetOwner(CurrentElementQueue());
flattened_processing_stack_.push_back(callback_queue);
++element_queue_end_;
}
void V0CustomElementProcessingStack::Trace(blink::Visitor* visitor) {
visitor->Trace(flattened_processing_stack_);
}
} // namespace blink
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