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
34 namespace WebCore {
35
create(PassRefPtr<Element> element)36 PassOwnPtr<CustomElementCallbackQueue> CustomElementCallbackQueue::create(PassRefPtr<Element> element)
37 {
38 return adoptPtr(new CustomElementCallbackQueue(element));
39 }
40
CustomElementCallbackQueue(PassRefPtr<Element> element)41 CustomElementCallbackQueue::CustomElementCallbackQueue(PassRefPtr<Element> element)
42 : m_element(element)
43 , m_owner(-1)
44 , m_index(0)
45 , m_inCreatedCallback(false)
46 {
47 }
48
processInElementQueue(ElementQueue caller)49 void CustomElementCallbackQueue::processInElementQueue(ElementQueue caller)
50 {
51 ASSERT(!m_inCreatedCallback);
52
53 while (m_index < m_queue.size() && owner() == caller) {
54 m_inCreatedCallback = m_queue[m_index]->isCreated();
55
56 // dispatch() may cause recursion which steals this callback
57 // queue and reenters processInQueue. owner() == caller
58 // detects this recursion and cedes processing.
59 m_queue[m_index++]->dispatch(m_element.get());
60 m_inCreatedCallback = false;
61 }
62
63 if (owner() == caller && m_index == m_queue.size()) {
64 // This processInQueue exhausted the queue; shrink it.
65 m_index = 0;
66 m_queue.resize(0);
67 m_owner = -1;
68 }
69 }
70
71 } // namespace WebCore
72