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
222
223
224
225
226
227
228
229
230
231
|
/* -*- 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/. */
#include "mozilla/dom/HTMLSharedElement.h"
#include "mozilla/dom/BindContext.h"
#include "mozilla/dom/HTMLBaseElementBinding.h"
#include "mozilla/dom/HTMLDirectoryElementBinding.h"
#include "mozilla/dom/HTMLHeadElementBinding.h"
#include "mozilla/dom/HTMLHtmlElementBinding.h"
#include "mozilla/dom/HTMLParamElementBinding.h"
#include "mozilla/dom/HTMLQuoteElementBinding.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "nsContentUtils.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIURI.h"
NS_IMPL_NS_NEW_HTML_ELEMENT(Shared)
namespace mozilla::dom {
HTMLSharedElement::~HTMLSharedElement() = default;
NS_IMPL_ELEMENT_CLONE(HTMLSharedElement)
void HTMLSharedElement::GetHref(nsAString& aValue) {
MOZ_ASSERT(mNodeInfo->Equals(nsGkAtoms::base),
"This should only get called for <base> elements");
nsAutoString href;
GetAttr(nsGkAtoms::href, href);
nsCOMPtr<nsIURI> uri;
Document* doc = OwnerDoc();
nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(uri), href, doc,
doc->GetFallbackBaseURI());
if (!uri) {
aValue = href;
return;
}
nsAutoCString spec;
uri->GetSpec(spec);
CopyUTF8toUTF16(spec, aValue);
}
void HTMLSharedElement::DoneAddingChildren(bool aHaveNotified) {
if (mNodeInfo->Equals(nsGkAtoms::head)) {
if (nsCOMPtr<Document> doc = GetUncomposedDoc()) {
doc->OnL10nResourceContainerParsed();
if (!doc->IsLoadedAsData()) {
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, u"DOMHeadElementParsed"_ns,
CanBubble::eYes, ChromeOnlyDispatch::eYes);
// Always run async in order to avoid running script when the content
// sink isn't expecting it.
asyncDispatcher->PostDOMEvent();
}
}
}
}
static void SetBaseURIUsingFirstBaseWithHref(Document* aDocument,
nsIContent* aMustMatch) {
MOZ_ASSERT(aDocument, "Need a document!");
for (nsIContent* child = aDocument->GetFirstChild(); child;
child = child->GetNextNode()) {
if (child->IsHTMLElement(nsGkAtoms::base) &&
child->AsElement()->HasAttr(nsGkAtoms::href)) {
if (aMustMatch && child != aMustMatch) {
return;
}
// Resolve the <base> element's href relative to our document's
// fallback base URI.
nsAutoString href;
child->AsElement()->GetAttr(nsGkAtoms::href, href);
nsCOMPtr<nsIURI> newBaseURI;
nsContentUtils::NewURIWithDocumentCharset(
getter_AddRefs(newBaseURI), href, aDocument,
aDocument->GetFallbackBaseURI());
// Vaguely based on
// <https://html.spec.whatwg.org/multipage/semantics.html#set-the-frozen-base-url>
if (newBaseURI && (newBaseURI->SchemeIs("data") ||
newBaseURI->SchemeIs("javascript"))) {
newBaseURI = nullptr;
}
// Check if CSP allows this base-uri
nsCOMPtr<nsIContentSecurityPolicy> csp = aDocument->GetCsp();
if (csp && newBaseURI) {
// base-uri is only enforced if explicitly defined in the
// policy - do *not* consult default-src, see:
// http://www.w3.org/TR/CSP2/#directive-default-src
bool cspPermitsBaseURI = true;
nsresult rv = csp->Permits(
child->AsElement(), nullptr /* nsICSPEventListener */, newBaseURI,
nsIContentSecurityPolicy::BASE_URI_DIRECTIVE, true /* aSpecific */,
true /* aSendViolationReports */, &cspPermitsBaseURI);
if (NS_FAILED(rv) || !cspPermitsBaseURI) {
newBaseURI = nullptr;
}
}
aDocument->SetBaseURI(newBaseURI);
aDocument->SetChromeXHRDocBaseURI(nullptr);
return;
}
}
aDocument->SetBaseURI(nullptr);
}
static void SetBaseTargetUsingFirstBaseWithTarget(Document* aDocument,
nsIContent* aMustMatch) {
MOZ_ASSERT(aDocument, "Need a document!");
for (nsIContent* child = aDocument->GetFirstChild(); child;
child = child->GetNextNode()) {
if (child->IsHTMLElement(nsGkAtoms::base) &&
child->AsElement()->HasAttr(nsGkAtoms::target)) {
if (aMustMatch && child != aMustMatch) {
return;
}
nsString target;
child->AsElement()->GetAttr(nsGkAtoms::target, target);
aDocument->SetBaseTarget(target);
return;
}
}
aDocument->SetBaseTarget(u""_ns);
}
void HTMLSharedElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aSubjectPrincipal,
bool aNotify) {
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::href) {
// If the href attribute of a <base> tag is changing, we may need to
// update the document's base URI, which will cause all the links on the
// page to be re-resolved given the new base.
// If the href is being unset (aValue is null), we will need to find a new
// <base>.
if (mNodeInfo->Equals(nsGkAtoms::base) && IsInUncomposedDoc()) {
SetBaseURIUsingFirstBaseWithHref(GetUncomposedDoc(),
aValue ? this : nullptr);
}
} else if (aName == nsGkAtoms::target) {
// The target attribute is in pretty much the same situation as the href
// attribute, above.
if (mNodeInfo->Equals(nsGkAtoms::base) && IsInUncomposedDoc()) {
SetBaseTargetUsingFirstBaseWithTarget(GetUncomposedDoc(),
aValue ? this : nullptr);
}
}
}
return nsGenericHTMLElement::AfterSetAttr(
aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
}
nsresult HTMLSharedElement::BindToTree(BindContext& aContext,
nsINode& aParent) {
nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
NS_ENSURE_SUCCESS(rv, rv);
// The document stores a pointer to its base URI and base target, which we may
// need to update here.
if (mNodeInfo->Equals(nsGkAtoms::base) && IsInUncomposedDoc()) {
if (HasAttr(nsGkAtoms::href)) {
SetBaseURIUsingFirstBaseWithHref(&aContext.OwnerDoc(), this);
}
if (HasAttr(nsGkAtoms::target)) {
SetBaseTargetUsingFirstBaseWithTarget(&aContext.OwnerDoc(), this);
}
}
return NS_OK;
}
void HTMLSharedElement::UnbindFromTree(UnbindContext& aContext) {
Document* doc = GetUncomposedDoc();
nsGenericHTMLElement::UnbindFromTree(aContext);
// If we're removing a <base> from a document, we may need to update the
// document's base URI and base target
if (doc && mNodeInfo->Equals(nsGkAtoms::base)) {
if (HasAttr(nsGkAtoms::href)) {
SetBaseURIUsingFirstBaseWithHref(doc, nullptr);
}
if (HasAttr(nsGkAtoms::target)) {
SetBaseTargetUsingFirstBaseWithTarget(doc, nullptr);
}
}
}
JSObject* HTMLSharedElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
if (mNodeInfo->Equals(nsGkAtoms::param)) {
return HTMLParamElement_Binding::Wrap(aCx, this, aGivenProto);
}
if (mNodeInfo->Equals(nsGkAtoms::base)) {
return HTMLBaseElement_Binding::Wrap(aCx, this, aGivenProto);
}
if (mNodeInfo->Equals(nsGkAtoms::dir)) {
return HTMLDirectoryElement_Binding::Wrap(aCx, this, aGivenProto);
}
if (mNodeInfo->Equals(nsGkAtoms::q) ||
mNodeInfo->Equals(nsGkAtoms::blockquote)) {
return HTMLQuoteElement_Binding::Wrap(aCx, this, aGivenProto);
}
if (mNodeInfo->Equals(nsGkAtoms::head)) {
return HTMLHeadElement_Binding::Wrap(aCx, this, aGivenProto);
}
MOZ_ASSERT(mNodeInfo->Equals(nsGkAtoms::html));
return HTMLHtmlElement_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom
|
