1 /*
2 * Copyright (C) 2012 Adobe Systems Incorporated. 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
9 * copyright notice, this list of conditions and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following
13 * disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include "config.h"
31 #include "core/dom/NamedFlowCollection.h"
32
33 #include "RuntimeEnabledFeatures.h"
34 #include "core/dom/DOMNamedFlowCollection.h"
35 #include "core/dom/Document.h"
36 #include "core/inspector/InspectorInstrumentation.h"
37 #include "wtf/text/StringHash.h"
38 #include "wtf/text/WTFString.h"
39
40 namespace WebCore {
41
NamedFlowCollection(Document * document)42 NamedFlowCollection::NamedFlowCollection(Document* document)
43 : DocumentLifecycleObserver(document)
44 {
45 ASSERT(RuntimeEnabledFeatures::cssRegionsEnabled());
46 }
47
namedFlows()48 Vector<RefPtr<NamedFlow> > NamedFlowCollection::namedFlows()
49 {
50 Vector<RefPtr<NamedFlow> > namedFlows;
51
52 for (NamedFlowSet::iterator it = m_namedFlows.begin(); it != m_namedFlows.end(); ++it) {
53 if ((*it)->flowState() == NamedFlow::FlowStateNull)
54 continue;
55
56 namedFlows.append(RefPtr<NamedFlow>(*it));
57 }
58
59 return namedFlows;
60 }
61
flowByName(const String & flowName)62 NamedFlow* NamedFlowCollection::flowByName(const String& flowName)
63 {
64 NamedFlowSet::iterator it = m_namedFlows.find<NamedFlowHashTranslator>(flowName);
65 if (it == m_namedFlows.end() || (*it)->flowState() == NamedFlow::FlowStateNull)
66 return 0;
67
68 return *it;
69 }
70
ensureFlowWithName(const String & flowName)71 PassRefPtr<NamedFlow> NamedFlowCollection::ensureFlowWithName(const String& flowName)
72 {
73 NamedFlowSet::iterator it = m_namedFlows.find<NamedFlowHashTranslator>(flowName);
74 if (it != m_namedFlows.end()) {
75 NamedFlow* namedFlow = *it;
76 ASSERT(namedFlow->flowState() == NamedFlow::FlowStateNull);
77
78 return namedFlow;
79 }
80
81 RefPtr<NamedFlow> newFlow = NamedFlow::create(this, flowName);
82 m_namedFlows.add(newFlow.get());
83
84 InspectorInstrumentation::didCreateNamedFlow(document(), newFlow.get());
85
86 return newFlow.release();
87 }
88
discardNamedFlow(NamedFlow * namedFlow)89 void NamedFlowCollection::discardNamedFlow(NamedFlow* namedFlow)
90 {
91 // The document is not valid anymore so the collection will be destroyed anyway.
92 if (!document())
93 return;
94
95 ASSERT(namedFlow->flowState() == NamedFlow::FlowStateNull);
96 ASSERT(m_namedFlows.contains(namedFlow));
97
98 InspectorInstrumentation::willRemoveNamedFlow(document(), namedFlow);
99
100 m_namedFlows.remove(namedFlow);
101 }
102
document() const103 Document* NamedFlowCollection::document() const
104 {
105 return lifecycleContext();
106 }
107
createCSSOMSnapshot()108 PassRefPtr<DOMNamedFlowCollection> NamedFlowCollection::createCSSOMSnapshot()
109 {
110 Vector<NamedFlow*> createdFlows;
111 for (NamedFlowSet::iterator it = m_namedFlows.begin(); it != m_namedFlows.end(); ++it)
112 if ((*it)->flowState() == NamedFlow::FlowStateCreated)
113 createdFlows.append(*it);
114 return DOMNamedFlowCollection::create(createdFlows);
115 }
116
117 // The HashFunctions object used by the HashSet to compare between NamedFlows.
118 // It is safe to set safeToCompareToEmptyOrDeleted because the HashSet will never contain null pointers or deleted values.
119 struct NamedFlowCollection::NamedFlowHashFunctions {
hashWebCore::NamedFlowCollection::NamedFlowHashFunctions120 static unsigned hash(NamedFlow* key) { return DefaultHash<String>::Hash::hash(key->name()); }
equalWebCore::NamedFlowCollection::NamedFlowHashFunctions121 static bool equal(NamedFlow* a, NamedFlow* b) { return a->name() == b->name(); }
122 static const bool safeToCompareToEmptyOrDeleted = true;
123 };
124
125 // The HashTranslator is used to lookup a NamedFlow in the set using a name.
126 struct NamedFlowCollection::NamedFlowHashTranslator {
hashWebCore::NamedFlowCollection::NamedFlowHashTranslator127 static unsigned hash(const String& key) { return DefaultHash<String>::Hash::hash(key); }
equalWebCore::NamedFlowCollection::NamedFlowHashTranslator128 static bool equal(NamedFlow* a, const String& b) { return a->name() == b; }
129 };
130
131 } // namespace WebCore
132