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#ifndef CustomElementCallbackQueue_h
32#define CustomElementCallbackQueue_h
33
34#include "core/dom/Element.h"
35#include "core/dom/custom/CustomElementProcessingStep.h"
36#include "platform/heap/Handle.h"
37#include "wtf/OwnPtr.h"
38#include "wtf/PassOwnPtr.h"
39#include "wtf/PassRefPtr.h"
40#include "wtf/RefPtr.h"
41#include "wtf/Vector.h"
42
43namespace blink {
44
45// FIXME: Rename this because it contains resolution and upgrade as
46// well as callbacks.
47class CustomElementCallbackQueue : public NoBaseWillBeGarbageCollectedFinalized<CustomElementCallbackQueue> {
48    WTF_MAKE_NONCOPYABLE(CustomElementCallbackQueue);
49public:
50    static PassOwnPtrWillBeRawPtr<CustomElementCallbackQueue> create(PassRefPtrWillBeRawPtr<Element>);
51
52    typedef int ElementQueueId;
53    ElementQueueId owner() const { return m_owner; }
54
55    void setOwner(ElementQueueId newOwner)
56    {
57        // ElementCallbackQueues only migrate towards the top of the
58        // processing stack.
59        ASSERT(newOwner >= m_owner);
60        m_owner = newOwner;
61    }
62
63    bool processInElementQueue(ElementQueueId);
64
65    void append(PassOwnPtr<CustomElementProcessingStep> invocation) { m_queue.append(invocation); }
66    bool inCreatedCallback() const { return m_inCreatedCallback; }
67
68    void trace(Visitor*);
69
70private:
71    explicit CustomElementCallbackQueue(PassRefPtrWillBeRawPtr<Element>);
72
73    RefPtrWillBeMember<Element> m_element;
74    Vector<OwnPtr<CustomElementProcessingStep> > m_queue;
75    ElementQueueId m_owner;
76    size_t m_index;
77    bool m_inCreatedCallback;
78};
79
80}
81
82#endif // CustomElementCallbackQueue_h
83