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
|
/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2005, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights
* reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "third_party/blink/renderer/core/css/style_rule_import.h"
#include "third_party/blink/renderer/core/css/style_sheet_contents.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/loader/resource/css_style_sheet_resource.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_initiator_type_names.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_parameters.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_fetcher.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_loader_options.h"
namespace blink {
StyleRuleImport::StyleRuleImport(const String& href,
scoped_refptr<MediaQuerySet> media,
OriginClean origin_clean)
: StyleRuleBase(kImport),
parent_style_sheet_(nullptr),
style_sheet_client_(MakeGarbageCollected<ImportedStyleSheetClient>(this)),
str_href_(href),
media_queries_(media),
loading_(false),
origin_clean_(origin_clean) {
if (!media_queries_)
media_queries_ = MediaQuerySet::Create(String(), nullptr);
}
StyleRuleImport::~StyleRuleImport() = default;
void StyleRuleImport::Dispose() {
style_sheet_client_->Dispose();
}
void StyleRuleImport::TraceAfterDispatch(blink::Visitor* visitor) const {
visitor->Trace(style_sheet_client_);
visitor->Trace(parent_style_sheet_);
visitor->Trace(style_sheet_);
StyleRuleBase::TraceAfterDispatch(visitor);
}
void StyleRuleImport::NotifyFinished(Resource* resource) {
if (style_sheet_)
style_sheet_->ClearOwnerRule();
CSSStyleSheetResource* cached_style_sheet = ToCSSStyleSheetResource(resource);
Document* document = nullptr;
// Fallback to an insecure context parser if we don't have a parent style
// sheet.
const CSSParserContext* parent_context =
StrictCSSParserContext(SecureContextMode::kInsecureContext);
if (parent_style_sheet_) {
document = parent_style_sheet_->SingleOwnerDocument();
parent_context = parent_style_sheet_->ParserContext();
}
// If either parent or resource is marked as ad, the new CSS will be tagged
// as an ad.
CSSParserContext* context = MakeGarbageCollected<CSSParserContext>(
parent_context, cached_style_sheet->GetResponse().ResponseUrl(),
cached_style_sheet->GetResponse().IsCorsSameOrigin(),
cached_style_sheet->GetReferrerPolicy(), cached_style_sheet->Encoding(),
document);
if (cached_style_sheet->GetResourceRequest().IsAdResource())
context->SetIsAdRelated();
style_sheet_ = MakeGarbageCollected<StyleSheetContents>(
context, cached_style_sheet->Url(), this);
style_sheet_->ParseAuthorStyleSheet(cached_style_sheet);
loading_ = false;
if (parent_style_sheet_) {
parent_style_sheet_->NotifyLoadedSheet(cached_style_sheet);
parent_style_sheet_->CheckLoaded();
}
}
bool StyleRuleImport::IsLoading() const {
return loading_ || (style_sheet_ && style_sheet_->IsLoading());
}
void StyleRuleImport::RequestStyleSheet() {
if (!parent_style_sheet_)
return;
Document* document = parent_style_sheet_->SingleOwnerDocument();
if (!document)
return;
Document* document_for_origin = document;
if (document->ImportsController()) {
// For @imports from HTML imported Documents, we use the
// context document for getting origin and ResourceFetcher to use the main
// Document's origin, while using the element document for CompleteURL() to
// use imported Documents' base URLs.
document_for_origin =
To<LocalDOMWindow>(document->GetExecutionContext())->document();
}
ResourceFetcher* fetcher = document_for_origin->Fetcher();
if (!fetcher)
return;
KURL abs_url;
if (!parent_style_sheet_->BaseURL().IsNull()) {
// use parent styleheet's URL as the base URL
abs_url = KURL(parent_style_sheet_->BaseURL(), str_href_);
} else {
abs_url = document->CompleteURL(str_href_);
}
// Check for a cycle in our import chain. If we encounter a stylesheet
// in our parent chain with the same URL, then just bail.
StyleSheetContents* root_sheet = parent_style_sheet_;
for (StyleSheetContents* sheet = parent_style_sheet_; sheet;
sheet = sheet->ParentStyleSheet()) {
if (EqualIgnoringFragmentIdentifier(abs_url, sheet->BaseURL()) ||
EqualIgnoringFragmentIdentifier(
abs_url, document->CompleteURL(sheet->OriginalURL())))
return;
root_sheet = sheet;
}
const CSSParserContext* parser_context = parent_style_sheet_->ParserContext();
Referrer referrer = parser_context->GetReferrer();
ResourceLoaderOptions options(parser_context->JavascriptWorld());
options.initiator_info.name = fetch_initiator_type_names::kCSS;
options.initiator_info.referrer = referrer.referrer;
ResourceRequest resource_request(abs_url);
resource_request.SetReferrerString(referrer.referrer);
resource_request.SetReferrerPolicy(referrer.referrer_policy);
if (parser_context->IsAdRelated())
resource_request.SetIsAdResource();
FetchParameters params(std::move(resource_request), options);
params.SetCharset(parent_style_sheet_->Charset());
params.SetFromOriginDirtyStyleSheet(origin_clean_ != OriginClean::kTrue);
loading_ = true;
DCHECK(!style_sheet_client_->GetResource());
CSSStyleSheetResource::Fetch(params, fetcher, style_sheet_client_);
if (loading_) {
// if the import rule is issued dynamically, the sheet may be
// removed from the pending sheet count, so let the doc know
// the sheet being imported is pending.
if (parent_style_sheet_ && parent_style_sheet_->LoadCompleted() &&
root_sheet == parent_style_sheet_) {
parent_style_sheet_->StartLoadingDynamicSheet();
}
}
}
} // namespace blink
|
