1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "XMLStylesheetProcessingInstruction.h"
8
9 #include "mozilla/dom/Document.h"
10 #include "mozilla/dom/ReferrerInfo.h"
11 #include "nsContentUtils.h"
12 #include "nsNetUtil.h"
13
14 namespace mozilla {
15 namespace dom {
16
17 // nsISupports implementation
18
19 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(
20 XMLStylesheetProcessingInstruction, ProcessingInstruction)
21
22 NS_IMPL_CYCLE_COLLECTION_CLASS(XMLStylesheetProcessingInstruction)
23
24 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(
25 XMLStylesheetProcessingInstruction, ProcessingInstruction)
26 tmp->LinkStyle::Traverse(cb);
27 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
28
29 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(
30 XMLStylesheetProcessingInstruction, ProcessingInstruction)
31 tmp->LinkStyle::Unlink();
32 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
33
34 XMLStylesheetProcessingInstruction::~XMLStylesheetProcessingInstruction() =
35 default;
36
37 // nsIContent
38
BindToTree(BindContext & aContext,nsINode & aParent)39 nsresult XMLStylesheetProcessingInstruction::BindToTree(BindContext& aContext,
40 nsINode& aParent) {
41 nsresult rv = ProcessingInstruction::BindToTree(aContext, aParent);
42 NS_ENSURE_SUCCESS(rv, rv);
43
44 void (XMLStylesheetProcessingInstruction::*update)() =
45 &XMLStylesheetProcessingInstruction::UpdateStyleSheetInternal;
46 nsContentUtils::AddScriptRunner(NewRunnableMethod(
47 "dom::XMLStylesheetProcessingInstruction::BindToTree", this, update));
48
49 return rv;
50 }
51
UnbindFromTree(bool aNullParent)52 void XMLStylesheetProcessingInstruction::UnbindFromTree(bool aNullParent) {
53 nsCOMPtr<Document> oldDoc = GetUncomposedDoc();
54
55 ProcessingInstruction::UnbindFromTree(aNullParent);
56 Unused << UpdateStyleSheetInternal(oldDoc, nullptr);
57 }
58
59 // nsINode
60
SetNodeValueInternal(const nsAString & aNodeValue,ErrorResult & aError)61 void XMLStylesheetProcessingInstruction::SetNodeValueInternal(
62 const nsAString& aNodeValue, ErrorResult& aError) {
63 CharacterData::SetNodeValueInternal(aNodeValue, aError);
64 if (!aError.Failed()) {
65 Unused << UpdateStyleSheetInternal(nullptr, nullptr, ForceUpdate::Yes);
66 }
67 }
68
69 // LinkStyle
70
GetCharset(nsAString & aCharset)71 void XMLStylesheetProcessingInstruction::GetCharset(nsAString& aCharset) {
72 if (!GetAttrValue(nsGkAtoms::charset, aCharset)) {
73 aCharset.Truncate();
74 }
75 }
76
OverrideBaseURI(nsIURI * aNewBaseURI)77 void XMLStylesheetProcessingInstruction::OverrideBaseURI(nsIURI* aNewBaseURI) {
78 mOverriddenBaseURI = aNewBaseURI;
79 }
80
81 Maybe<LinkStyle::SheetInfo>
GetStyleSheetInfo()82 XMLStylesheetProcessingInstruction::GetStyleSheetInfo() {
83 // xml-stylesheet PI is special only in prolog
84 if (!nsContentUtils::InProlog(this)) {
85 return Nothing();
86 }
87
88 nsAutoString href;
89 if (!GetAttrValue(nsGkAtoms::href, href)) {
90 return Nothing();
91 }
92
93 nsAutoString data;
94 GetData(data);
95
96 nsAutoString title;
97 nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::title, title);
98
99 nsAutoString alternateAttr;
100 nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::alternate,
101 alternateAttr);
102
103 bool alternate = alternateAttr.EqualsLiteral("yes");
104 if (alternate && title.IsEmpty()) {
105 // alternates must have title
106 return Nothing();
107 }
108
109 nsAutoString media;
110 nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::media, media);
111
112 // Make sure the type handling here matches
113 // nsXMLContentSink::HandleProcessingInstruction
114 nsAutoString type;
115 nsContentUtils::GetPseudoAttributeValue(data, nsGkAtoms::type, type);
116
117 nsAutoString mimeType, notUsed;
118 nsContentUtils::SplitMimeType(type, mimeType, notUsed);
119 if (!mimeType.IsEmpty() && !mimeType.LowerCaseEqualsLiteral("text/css")) {
120 return Nothing();
121 }
122
123 Document* doc = OwnerDoc();
124 nsIURI* baseURL =
125 mOverriddenBaseURI ? mOverriddenBaseURI.get() : doc->GetDocBaseURI();
126 auto encoding = doc->GetDocumentCharacterSet();
127 nsCOMPtr<nsIURI> uri;
128 NS_NewURI(getter_AddRefs(uri), href, encoding, baseURL);
129
130 return Some(SheetInfo{
131 *doc,
132 this,
133 uri.forget(),
134 nullptr,
135 MakeAndAddRef<ReferrerInfo>(*doc),
136 CORS_NONE,
137 title,
138 media,
139 /* integrity = */ u""_ns,
140 /* nonce = */ u""_ns,
141 alternate ? HasAlternateRel::Yes : HasAlternateRel::No,
142 IsInline::No,
143 IsExplicitlyEnabled::No,
144 });
145 }
146
147 already_AddRefed<CharacterData>
CloneDataNode(mozilla::dom::NodeInfo * aNodeInfo,bool aCloneText) const148 XMLStylesheetProcessingInstruction::CloneDataNode(
149 mozilla::dom::NodeInfo* aNodeInfo, bool aCloneText) const {
150 nsAutoString data;
151 GetData(data);
152 RefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo;
153 auto* nim = ni->NodeInfoManager();
154 return do_AddRef(new (nim)
155 XMLStylesheetProcessingInstruction(ni.forget(), data));
156 }
157
158 } // namespace dom
159 } // namespace mozilla
160