1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_shadowroot_h__
#define mozilla_dom_shadowroot_h__
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/StyleSheetList.h"
#include "mozilla/StyleSheet.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIContentInlines.h"
#include "nsTHashtable.h"
#include "nsDocument.h"
class nsIAtom;
class nsIContent;
class nsXBLPrototypeBinding;
namespace mozilla {
namespace dom {
class Element;
class HTMLContentElement;
class HTMLShadowElement;
class ShadowRootStyleSheetList;
class ShadowRoot final : public DocumentFragment,
public nsStubMutationObserver
{
friend class ShadowRootStyleSheetList;
public:
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ShadowRoot,
DocumentFragment)
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
ShadowRoot(nsIContent* aContent, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
nsXBLPrototypeBinding* aProtoBinding);
void AddToIdTable(Element* aElement, nsIAtom* aId);
void RemoveFromIdTable(Element* aElement, nsIAtom* aId);
void InsertSheet(StyleSheet* aSheet, nsIContent* aLinkingContent);
void RemoveSheet(StyleSheet* aSheet);
bool ApplyAuthorStyles();
void SetApplyAuthorStyles(bool aApplyAuthorStyles);
StyleSheetList* StyleSheets();
HTMLShadowElement* GetShadowElement() { return mShadowElement; }
/**
* Sets the current shadow insertion point where the older
* ShadowRoot will be projected.
*/
void SetShadowElement(HTMLShadowElement* aShadowElement);
/**
* Change the node that populates the distribution pool with
* its children. This is distinct from the ShadowRoot host described
* in the specifications. The ShadowRoot host is the element
* which created this ShadowRoot and does not change. The pool host
* is the same as the ShadowRoot host if this is the youngest
* ShadowRoot. If this is an older ShadowRoot, the pool host is
* the <shadow> element in the younger ShadowRoot (if it exists).
*/
void ChangePoolHost(nsIContent* aNewHost);
/**
* Distributes a single explicit child of the pool host to the content
* insertion points in this ShadowRoot.
*/
void DistributeSingleNode(nsIContent* aContent);
/**
* Removes a single explicit child of the pool host from the content
* insertion points in this ShadowRoot.
*/
void RemoveDistributedNode(nsIContent* aContent);
/**
* Distributes all the explicit children of the pool host to the content
* insertion points in this ShadowRoot.
*/
void DistributeAllNodes();
void AddInsertionPoint(HTMLContentElement* aInsertionPoint);
void RemoveInsertionPoint(HTMLContentElement* aInsertionPoint);
void SetYoungerShadow(ShadowRoot* aYoungerShadow);
ShadowRoot* GetYoungerShadowRoot() { return mYoungerShadow; }
void SetInsertionPointChanged() { mInsertionPointChanged = true; }
void SetAssociatedBinding(nsXBLBinding* aBinding) { mAssociatedBinding = aBinding; }
nsISupports* GetParentObject() const { return mPoolHost; }
nsIContent* GetPoolHost() { return mPoolHost; }
nsTArray<HTMLShadowElement*>& ShadowDescendants() { return mShadowDescendants; }
JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
static bool IsPooledNode(nsIContent* aChild, nsIContent* aContainer,
nsIContent* aHost);
static ShadowRoot* FromNode(nsINode* aNode);
static bool IsShadowInsertionPoint(nsIContent* aContent);
static void RemoveDestInsertionPoint(nsIContent* aInsertionPoint,
nsTArray<nsIContent*>& aDestInsertionPoints);
// WebIDL methods.
Element* GetElementById(const nsAString& aElementId);
already_AddRefed<nsContentList>
GetElementsByTagName(const nsAString& aNamespaceURI);
already_AddRefed<nsContentList>
GetElementsByTagNameNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName);
already_AddRefed<nsContentList>
GetElementsByClassName(const nsAString& aClasses);
void GetInnerHTML(nsAString& aInnerHTML);
void SetInnerHTML(const nsAString& aInnerHTML, ErrorResult& aError);
Element* Host();
ShadowRoot* GetOlderShadowRoot() { return mOlderShadow; }
void StyleSheetChanged();
bool IsComposedDocParticipant() { return mIsComposedDocParticipant; }
void SetIsComposedDocParticipant(bool aIsComposedDocParticipant)
{
mIsComposedDocParticipant = aIsComposedDocParticipant;
}
virtual void DestroyContent() override;
protected:
virtual ~ShadowRoot();
// The pool host is the parent of the nodes that will be distributed
// into the insertion points in this ShadowRoot. See |ChangeShadowRoot|.
nsCOMPtr<nsIContent> mPoolHost;
// An array of content insertion points that are a descendant of the ShadowRoot
// sorted in tree order. Insertion points are responsible for notifying
// the ShadowRoot when they are removed or added as a descendant. The insertion
// points are kept alive by the parent node, thus weak references are held
// by the array.
nsTArray<HTMLContentElement*> mInsertionPoints;
// An array of the <shadow> elements that are descendant of the ShadowRoot
// sorted in tree order. Only the first may be a shadow insertion point.
nsTArray<HTMLShadowElement*> mShadowDescendants;
nsTHashtable<nsIdentifierMapEntry> mIdentifierMap;
nsXBLPrototypeBinding* mProtoBinding;
// It is necessary to hold a reference to the associated nsXBLBinding
// because the binding holds a reference on the nsXBLDocumentInfo that
// owns |mProtoBinding|.
RefPtr<nsXBLBinding> mAssociatedBinding;
RefPtr<ShadowRootStyleSheetList> mStyleSheetList;
// The current shadow insertion point of this ShadowRoot.
HTMLShadowElement* mShadowElement;
// The ShadowRoot that was created by the host element before
// this ShadowRoot was created.
RefPtr<ShadowRoot> mOlderShadow;
// The ShadowRoot that was created by the host element after
// this ShadowRoot was created.
RefPtr<ShadowRoot> mYoungerShadow;
// A boolean that indicates that an insertion point was added or removed
// from this ShadowRoot and that the nodes need to be redistributed into
// the insertion points. After this flag is set, nodes will be distributed
// on the next mutation event.
bool mInsertionPointChanged;
// Flag to indicate whether the descendants of this shadow root are part of the
// composed document. Ideally, we would use a node flag on nodes to
// mark whether it is in the composed document, but we have run out of flags
// so instead we track it here.
bool mIsComposedDocParticipant;
nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
};
class ShadowRootStyleSheetList : public StyleSheetList
{
public:
explicit ShadowRootStyleSheetList(ShadowRoot* aShadowRoot);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ShadowRootStyleSheetList, StyleSheetList)
virtual nsINode* GetParentObject() const override
{
return mShadowRoot;
}
uint32_t Length() override;
StyleSheet* IndexedGetter(uint32_t aIndex, bool& aFound) override;
protected:
virtual ~ShadowRootStyleSheetList();
RefPtr<ShadowRoot> mShadowRoot;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_shadowroot_h__
|
