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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 "core/dom/custom/V0CustomElementCallbackQueue.h"
#include "core/dom/shadow/ShadowRoot.h"
namespace blink {
V0CustomElementCallbackQueue* V0CustomElementCallbackQueue::create(
Element* element) {
return new V0CustomElementCallbackQueue(element);
}
V0CustomElementCallbackQueue::V0CustomElementCallbackQueue(Element* element)
: m_element(element), m_owner(-1), m_index(0), m_inCreatedCallback(false) {}
bool V0CustomElementCallbackQueue::processInElementQueue(
ElementQueueId caller) {
DCHECK(!m_inCreatedCallback);
bool didWork = false;
// Never run custom element callbacks in UA shadow roots since that would
// leak the UA root and it's elements into the page.
ShadowRoot* shadowRoot = m_element->containingShadowRoot();
if (!shadowRoot || shadowRoot->type() != ShadowRootType::UserAgent) {
while (m_index < m_queue.size() && owner() == caller) {
m_inCreatedCallback = m_queue[m_index]->isCreatedCallback();
// dispatch() may cause recursion which steals this callback
// queue and reenters processInQueue. owner() == caller
// detects this recursion and cedes processing.
m_queue[m_index++]->dispatch(m_element.get());
m_inCreatedCallback = false;
didWork = true;
}
}
if (owner() == caller && m_index == m_queue.size()) {
// This processInQueue exhausted the queue; shrink it.
m_index = 0;
m_queue.resize(0);
m_owner = -1;
}
return didWork;
}
DEFINE_TRACE(V0CustomElementCallbackQueue) {
visitor->trace(m_element);
visitor->trace(m_queue);
}
} // namespace blink
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