// Copyright 2016 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 "core/dom/custom/CustomElementReactionQueue.h"

#include "core/dom/custom/CustomElementReaction.h"

namespace blink {

CustomElementReactionQueue::CustomElementReactionQueue()
    : m_index(0u)
{
}

CustomElementReactionQueue::~CustomElementReactionQueue()
{
}

DEFINE_TRACE(CustomElementReactionQueue)
{
    visitor->trace(m_reactions);
}

void CustomElementReactionQueue::add(CustomElementReaction* reaction)
{
    m_reactions.append(reaction);
}

// There is one queue per element, so this could be invoked
// recursively.
void CustomElementReactionQueue::invokeReactions(Element* element)
{
    while (m_index < m_reactions.size()) {
        CustomElementReaction* reaction = m_reactions[m_index];
        m_reactions[m_index++] = nullptr;
        reaction->invoke(element);
    }
    // Unlike V0CustomElementsCallbackQueue, reactions are always
    // inserted by steps which bump the global element queue. This
    // means we do not need queue "owner" guards.
    // https://html.spec.whatwg.org/multipage/scripting.html#custom-element-reactions
    m_index = 0;
    m_reactions.resize(0);
}

} // namespace blink