1 /*
2 * Copyright (C) 2012 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 InsertionPoint_h
32 #define InsertionPoint_h
33
34 #include "core/css/CSSSelectorList.h"
35 #include "core/dom/shadow/ContentDistribution.h"
36 #include "core/dom/shadow/ShadowRoot.h"
37 #include "core/html/HTMLElement.h"
38 #include "wtf/Forward.h"
39
40 namespace WebCore {
41
42 class InsertionPoint : public HTMLElement {
43 public:
44 virtual ~InsertionPoint();
45
hasDistribution()46 bool hasDistribution() const { return !m_distribution.isEmpty(); }
47 void setDistribution(ContentDistribution&);
clearDistribution()48 void clearDistribution() { m_distribution.clear(); }
49 bool isActive() const;
50 bool canBeActive() const;
51
52 bool isShadowInsertionPoint() const;
53 bool isContentInsertionPoint() const;
54
55 PassRefPtr<NodeList> getDistributedNodes();
56
canAffectSelector()57 virtual bool canAffectSelector() const { return false; }
58
59 bool resetStyleInheritance() const;
60 void setResetStyleInheritance(bool);
61
62 virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
63 virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
64
65 bool shouldUseFallbackElements() const;
66
size()67 size_t size() const { return m_distribution.size(); }
at(size_t index)68 Node* at(size_t index) const { return m_distribution.at(index).get(); }
first()69 Node* first() const { return m_distribution.isEmpty() ? 0 : m_distribution.first().get(); }
last()70 Node* last() const { return m_distribution.isEmpty() ? 0 : m_distribution.last().get(); }
nextTo(const Node * node)71 Node* nextTo(const Node* node) const { return m_distribution.nextTo(node); }
previousTo(const Node * node)72 Node* previousTo(const Node* node) const { return m_distribution.previousTo(node); }
73
74 protected:
75 InsertionPoint(const QualifiedName&, Document&);
76 virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
77 virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE;
78 virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
79 virtual void removedFrom(ContainerNode*) OVERRIDE;
80 virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
81 virtual void willRecalcStyle(StyleRecalcChange) OVERRIDE;
82
83 private:
84 ContentDistribution m_distribution;
85 bool m_registeredWithShadowRoot;
86 };
87
88 typedef Vector<RefPtr<InsertionPoint> > DestinationInsertionPoints;
89
90 DEFINE_NODE_TYPE_CASTS(InsertionPoint, isInsertionPoint());
91
isActiveInsertionPoint(const Node & node)92 inline bool isActiveInsertionPoint(const Node& node)
93 {
94 return node.isInsertionPoint() && toInsertionPoint(node).isActive();
95 }
96
isActiveShadowInsertionPoint(const Node & node)97 inline bool isActiveShadowInsertionPoint(const Node& node)
98 {
99 return node.isInsertionPoint() && toInsertionPoint(node).isShadowInsertionPoint();
100 }
101
shadowWhereNodeCanBeDistributed(const Node & node)102 inline ElementShadow* shadowWhereNodeCanBeDistributed(const Node& node)
103 {
104 Node* parent = node.parentNode();
105 if (!parent)
106 return 0;
107 if (parent->isShadowRoot() && !toShadowRoot(parent)->isYoungest())
108 return node.shadowHost()->shadow();
109 if (isActiveInsertionPoint(*parent))
110 return node.shadowHost()->shadow();
111 if (parent->isElementNode())
112 return toElement(parent)->shadow();
113 return 0;
114 }
115
116 const InsertionPoint* resolveReprojection(const Node*);
117
118 void collectDestinationInsertionPoints(const Node&, Vector<InsertionPoint*, 8>& results);
119
120 } // namespace WebCore
121
122 #endif // InsertionPoint_h
123