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
219
220
221
|
/* -*- 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/. */
/*
* Implementation of DOM Core's Attr node.
*/
#include "mozilla/dom/Attr.h"
#include "mozilla/dom/AttrBinding.h"
#include "mozilla/dom/Element.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/StaticPrefs_dom.h"
#include "nsContentCreatorFunctions.h"
#include "nsError.h"
#include "nsUnicharUtils.h"
#include "nsDOMString.h"
#include "nsIContentInlines.h"
#include "mozilla/dom/Document.h"
#include "nsGkAtoms.h"
#include "nsCOMArray.h"
#include "nsNameSpaceManager.h"
#include "nsTextNode.h"
#include "mozAutoDocUpdate.h"
#include "nsWrapperCacheInlines.h"
#include "NodeUbiReporting.h"
namespace mozilla::dom {
//----------------------------------------------------------------------
bool Attr::sInitialized;
Attr::Attr(nsDOMAttributeMap* aAttrMap,
already_AddRefed<dom::NodeInfo>&& aNodeInfo, const nsAString& aValue)
: nsINode(std::move(aNodeInfo)), mAttrMap(aAttrMap), mValue(aValue) {
MOZ_ASSERT(mNodeInfo, "We must get a nodeinfo here!");
MOZ_ASSERT(mNodeInfo->NodeType() == ATTRIBUTE_NODE, "Wrong nodeType");
// We don't add a reference to our content. It will tell us
// to drop our reference when it goes away.
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(Attr)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Attr)
if (!nsINode::Traverse(tmp, cb)) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAttrMap)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Attr)
nsINode::Unlink(tmp);
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAttrMap)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Attr)
Element* ownerElement = tmp->GetElement();
if (tmp->HasKnownLiveWrapper()) {
if (ownerElement) {
// The attribute owns the element via attribute map so we can
// mark it when the attribute is certainly alive.
mozilla::dom::FragmentOrElement::MarkNodeChildren(ownerElement);
}
return true;
}
if (ownerElement &&
mozilla::dom::FragmentOrElement::CanSkip(ownerElement, true)) {
return true;
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Attr)
return tmp->HasKnownLiveWrapperAndDoesNotNeedTracing(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Attr)
return tmp->HasKnownLiveWrapper();
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
// QueryInterface implementation for Attr
NS_INTERFACE_TABLE_HEAD(Attr)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE(Attr, nsINode, EventTarget)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(Attr)
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
new nsNodeSupportsWeakRefTearoff(this))
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(Attr)
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE_AND_DESTROY(Attr,
LastRelease(),
Destroy())
NS_IMPL_DOMARENA_DESTROY(Attr)
void Attr::SetMap(nsDOMAttributeMap* aMap) {
if (mAttrMap && !aMap && sInitialized) {
// We're breaking a relationship with content and not getting a new one,
// need to locally cache value. GetValue() does that.
GetValue(mValue);
}
mAttrMap = aMap;
}
Element* Attr::GetElement() const {
if (!mAttrMap) {
return nullptr;
}
nsIContent* content = mAttrMap->GetContent();
return content ? content->AsElement() : nullptr;
}
nsresult Attr::SetOwnerDocument(Document* aDocument) {
NS_ASSERTION(aDocument, "Missing document");
Document* doc = OwnerDoc();
NS_ASSERTION(doc != aDocument, "bad call to Attr::SetOwnerDocument");
doc->RemoveAllPropertiesFor(this);
RefPtr<dom::NodeInfo> newNodeInfo = aDocument->NodeInfoManager()->GetNodeInfo(
mNodeInfo->NameAtom(), mNodeInfo->GetPrefixAtom(),
mNodeInfo->NamespaceID(), ATTRIBUTE_NODE);
NS_ASSERTION(newNodeInfo, "GetNodeInfo lies");
mNodeInfo.swap(newNodeInfo);
return NS_OK;
}
void Attr::GetName(nsAString& aName) { aName = NodeName(); }
void Attr::GetValue(nsAString& aValue) {
Element* element = GetElement();
if (element) {
RefPtr<nsAtom> nameAtom = mNodeInfo->NameAtom();
element->GetAttr(mNodeInfo->NamespaceID(), nameAtom, aValue);
} else {
aValue = mValue;
}
}
void Attr::SetValue(const nsAString& aValue, nsIPrincipal* aTriggeringPrincipal,
ErrorResult& aRv) {
Element* element = GetElement();
if (!element) {
mValue = aValue;
return;
}
RefPtr<nsAtom> nameAtom = mNodeInfo->NameAtom();
aRv = element->SetAttr(mNodeInfo->NamespaceID(), nameAtom,
mNodeInfo->GetPrefixAtom(), aValue,
aTriggeringPrincipal, true);
}
void Attr::SetValue(const nsAString& aValue, ErrorResult& aRv) {
SetValue(aValue, nullptr, aRv);
}
bool Attr::Specified() const { return true; }
Element* Attr::GetOwnerElement() { return GetElement(); }
void Attr::GetNodeValueInternal(nsAString& aNodeValue) { GetValue(aNodeValue); }
void Attr::SetNodeValueInternal(const nsAString& aNodeValue,
ErrorResult& aError) {
SetValue(aNodeValue, nullptr, aError);
}
nsresult Attr::Clone(dom::NodeInfo* aNodeInfo, nsINode** aResult) const {
nsAutoString value;
const_cast<Attr*>(this)->GetValue(value);
*aResult = new (aNodeInfo->NodeInfoManager())
Attr(nullptr, do_AddRef(aNodeInfo), value);
NS_ADDREF(*aResult);
return NS_OK;
}
nsIURI* Attr::GetBaseURI(bool aTryUseXHRDocBaseURI) const {
Element* parent = GetElement();
return parent ? parent->GetBaseURI(aTryUseXHRDocBaseURI)
: OwnerDoc()->GetBaseURI(aTryUseXHRDocBaseURI);
}
void Attr::GetTextContentInternal(nsAString& aTextContent,
OOMReporter& aError) {
GetValue(aTextContent);
}
void Attr::SetTextContentInternal(const nsAString& aTextContent,
nsIPrincipal* aSubjectPrincipal,
ErrorResult& aError) {
SetNodeValueInternal(aTextContent, aError);
}
void Attr::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
aVisitor.mCanHandle = true;
}
void Attr::Initialize() { sInitialized = true; }
void Attr::Shutdown() { sInitialized = false; }
JSObject* Attr::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return Attr_Binding::Wrap(aCx, this, aGivenProto);
}
void Attr::ConstructUbiNode(void* storage) {
JS::ubi::Concrete<Attr>::construct(storage, this);
}
} // namespace mozilla::dom
|
