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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this 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 HTMLImportChild_h
32#define HTMLImportChild_h
33
34#include "core/html/imports/HTMLImport.h"
35#include "platform/heap/Handle.h"
36#include "platform/weborigin/KURL.h"
37#include "wtf/WeakPtr.h"
38
39namespace blink {
40
41class CustomElementMicrotaskImportStep;
42class HTMLImportLoader;
43class HTMLImportChildClient;
44class HTMLLinkElement;
45
46//
47// An import tree node subclas to encapsulate imported document
48// lifecycle. This class is owned by HTMLImportsController. The actual loading
49// is done by HTMLImportLoader, which can be shared among multiple
50// HTMLImportChild of same link URL.
51//
52class HTMLImportChild FINAL : public HTMLImport {
53public:
54    HTMLImportChild(const KURL&, HTMLImportLoader*, SyncMode);
55    virtual ~HTMLImportChild();
56
57    HTMLLinkElement* link() const;
58    const KURL& url() const { return m_url; }
59
60    void ownerInserted();
61    void didShareLoader();
62    void didStartLoading();
63#if !ENABLE(OILPAN)
64    void importDestroyed();
65    WeakPtr<HTMLImportChild> weakPtr() { return m_weakFactory.createWeakPtr(); }
66#endif
67
68    // HTMLImport
69    virtual Document* document() const OVERRIDE;
70    virtual bool isDone() const OVERRIDE;
71    virtual HTMLImportLoader* loader() const OVERRIDE;
72    virtual void stateWillChange() OVERRIDE;
73    virtual void stateDidChange() OVERRIDE;
74    virtual void trace(Visitor*) OVERRIDE;
75
76#if !defined(NDEBUG)
77    virtual void showThis() OVERRIDE;
78#endif
79
80    void setClient(HTMLImportChildClient*);
81#if !ENABLE(OILPAN)
82    void clearClient();
83#endif
84
85    void didFinishLoading();
86    void didFinishUpgradingCustomElements();
87    void normalize();
88
89private:
90    void didFinish();
91    void shareLoader();
92    void createCustomElementMicrotaskStepIfNeeded();
93    void invalidateCustomElementMicrotaskStep();
94
95    KURL m_url;
96    WeakPtrWillBeWeakMember<CustomElementMicrotaskImportStep> m_customElementMicrotaskStep;
97#if !ENABLE(OILPAN)
98    WeakPtrFactory<HTMLImportChild> m_weakFactory;
99#endif
100    RawPtrWillBeMember<HTMLImportLoader> m_loader;
101    RawPtrWillBeMember<HTMLImportChildClient> m_client;
102};
103
104inline HTMLImportChild* toHTMLImportChild(HTMLImport* import)
105{
106    ASSERT(!import || !import->isRoot());
107    return static_cast<HTMLImportChild*>(import);
108}
109
110} // namespace blink
111
112#endif // HTMLImportChild_h
113