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 #include "config.h"
32 #include "core/html/imports/LinkImport.h"
33
34 #include "core/dom/Document.h"
35 #include "core/fetch/CrossOriginAccessControl.h"
36 #include "core/html/HTMLLinkElement.h"
37 #include "core/html/imports/HTMLImportChild.h"
38 #include "core/html/imports/HTMLImportLoader.h"
39 #include "core/html/imports/HTMLImportTreeRoot.h"
40 #include "core/html/imports/HTMLImportsController.h"
41
42 namespace WebCore {
43
create(HTMLLinkElement * owner)44 PassOwnPtrWillBeRawPtr<LinkImport> LinkImport::create(HTMLLinkElement* owner)
45 {
46 return adoptPtrWillBeNoop(new LinkImport(owner));
47 }
48
LinkImport(HTMLLinkElement * owner)49 LinkImport::LinkImport(HTMLLinkElement* owner)
50 : LinkResource(owner)
51 , m_child(nullptr)
52 {
53 }
54
~LinkImport()55 LinkImport::~LinkImport()
56 {
57 #if !ENABLE(OILPAN)
58 if (m_child) {
59 m_child->clearClient();
60 m_child = nullptr;
61 }
62 #endif
63 }
64
importedDocument() const65 Document* LinkImport::importedDocument() const
66 {
67 if (!m_child || !m_owner || !m_owner->inDocument())
68 return 0;
69 if (m_child->loader()->hasError())
70 return 0;
71 return m_child->document();
72 }
73
process()74 void LinkImport::process()
75 {
76 if (m_child)
77 return;
78 if (!m_owner)
79 return;
80 if (!shouldLoadResource())
81 return;
82
83 if (!m_owner->document().importsController()) {
84 ASSERT(m_owner->document().frame()); // The document should be the master.
85 HTMLImportsController::provideTo(m_owner->document());
86 }
87
88 LinkRequestBuilder builder(m_owner);
89 if (!builder.isValid()) {
90 didFinish();
91 return;
92 }
93
94 HTMLImportsController* controller = m_owner->document().importsController();
95 HTMLImportLoader* loader = m_owner->document().importLoader();
96 HTMLImport* parent = loader ? static_cast<HTMLImport*>(loader->firstImport()) : static_cast<HTMLImport*>(controller->root());
97 m_child = controller->load(parent, this, builder.build(true));
98 if (!m_child) {
99 didFinish();
100 return;
101 }
102 }
103
didFinish()104 void LinkImport::didFinish()
105 {
106 if (!m_owner || !m_owner->inDocument())
107 return;
108 m_owner->scheduleEvent();
109 }
110
111 #if !ENABLE(OILPAN)
importChildWasDestroyed(HTMLImportChild * child)112 void LinkImport::importChildWasDestroyed(HTMLImportChild* child)
113 {
114 ASSERT(m_child == child);
115 m_child = nullptr;
116 m_owner = nullptr;
117 }
118 #endif
119
isSync() const120 bool LinkImport::isSync() const
121 {
122 return m_owner && !m_owner->async();
123 }
124
link()125 HTMLLinkElement* LinkImport::link()
126 {
127 return m_owner;
128 }
129
hasLoaded() const130 bool LinkImport::hasLoaded() const
131 {
132 // Should never be called after importChildWasDestroyed was called.
133 ASSERT(m_owner);
134 return m_child && m_child->isDone() && !m_child->loader()->hasError();
135 }
136
ownerInserted()137 void LinkImport::ownerInserted()
138 {
139 if (m_child)
140 m_child->ownerInserted();
141 }
142
trace(Visitor * visitor)143 void LinkImport::trace(Visitor* visitor)
144 {
145 visitor->trace(m_child);
146 HTMLImportChildClient::trace(visitor);
147 LinkResource::trace(visitor);
148 }
149
150 } // namespace WebCore
151