1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer
12 *    in the documentation and/or other materials provided with the
13 *    distribution.
14 * 3. Neither the name of Google Inc. nor the names of its contributors
15 *    may be used to endorse or promote products derived from this
16 *    software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "core/dom/custom/CustomElementCallbackQueue.h"
33
34namespace blink {
35
36PassOwnPtrWillBeRawPtr<CustomElementCallbackQueue> CustomElementCallbackQueue::create(PassRefPtrWillBeRawPtr<Element> element)
37{
38    return adoptPtrWillBeNoop(new CustomElementCallbackQueue(element));
39}
40
41CustomElementCallbackQueue::CustomElementCallbackQueue(PassRefPtrWillBeRawPtr<Element> element)
42    : m_element(element)
43    , m_owner(-1)
44    , m_index(0)
45    , m_inCreatedCallback(false)
46{
47}
48
49bool CustomElementCallbackQueue::processInElementQueue(ElementQueueId caller)
50{
51    ASSERT(!m_inCreatedCallback);
52    bool didWork = false;
53
54    while (m_index < m_queue.size() && owner() == caller) {
55        m_inCreatedCallback = m_queue[m_index]->isCreatedCallback();
56
57        // dispatch() may cause recursion which steals this callback
58        // queue and reenters processInQueue. owner() == caller
59        // detects this recursion and cedes processing.
60        m_queue[m_index++]->dispatch(m_element.get());
61        m_inCreatedCallback = false;
62        didWork = true;
63    }
64
65    if (owner() == caller && m_index == m_queue.size()) {
66        // This processInQueue exhausted the queue; shrink it.
67        m_index = 0;
68        m_queue.resize(0);
69        m_owner = -1;
70    }
71
72    return didWork;
73}
74
75void CustomElementCallbackQueue::trace(Visitor* visitor)
76{
77    visitor->trace(m_element);
78}
79
80} // namespace blink
81