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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_PARSER_CSS_PARSER_CONTEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_PARSER_CSS_PARSER_CONTEXT_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_property_names.h"
#include "third_party/blink/renderer/core/css/css_resource_fetch_restriction.h"
#include "third_party/blink/renderer/core/css/parser/css_parser_mode.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/web_feature_forward.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/loader/fetch/resource_loader_options.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/weborigin/referrer.h"
#include "third_party/blink/renderer/platform/wtf/text/text_encoding.h"
namespace blink {
class CSSStyleSheet;
class Document;
class StyleRuleKeyframe;
class StyleSheetContents;
class CORE_EXPORT CSSParserContext final
: public GarbageCollected<CSSParserContext> {
public:
// https://drafts.csswg.org/selectors/#profiles
enum SelectorProfile : uint8_t { kLiveProfile, kSnapshotProfile };
// All three of these constructors copy the context and override the current
// Document handle used for UseCounter.
CSSParserContext(const CSSParserContext*, const CSSStyleSheet*);
CSSParserContext(const CSSParserContext*, const StyleSheetContents*);
// FIXME: This constructor shouldn't exist if we properly piped the UseCounter
// through the CSS subsystem. Currently the UseCounter life time is too crazy
// and we need a way to override it.
explicit CSSParserContext(const CSSParserContext* other,
const Document* use_counter_document = nullptr);
CSSParserContext(const CSSParserContext* other,
const KURL& base_url_override,
bool origin_clean,
network::mojom::ReferrerPolicy referrer_policy_override,
const WTF::TextEncoding& charset_override,
const Document* use_counter_document);
CSSParserContext(CSSParserMode,
SecureContextMode,
SelectorProfile = kLiveProfile,
const Document* use_counter_document = nullptr);
CSSParserContext(const Document&);
CSSParserContext(const Document&,
const KURL& base_url_override,
bool origin_clean,
network::mojom::ReferrerPolicy referrer_policy_override,
const WTF::TextEncoding& charset = WTF::TextEncoding(),
SelectorProfile = kLiveProfile,
ResourceFetchRestriction resource_fetch_restriction =
ResourceFetchRestriction::kNone);
// This is used for workers, where we don't have a document.
CSSParserContext(const ExecutionContext& context);
CSSParserContext(const KURL& base_url,
bool origin_clean,
const WTF::TextEncoding& charset,
CSSParserMode,
CSSParserMode match_mode,
SelectorProfile,
const Referrer&,
bool is_html_document,
bool use_legacy_background_size_shorthand_behavior,
SecureContextMode,
network::mojom::CSPDisposition,
const Document* use_counter_document,
ResourceFetchRestriction resource_fetch_restriction);
bool operator==(const CSSParserContext&) const;
bool operator!=(const CSSParserContext& other) const {
return !(*this == other);
}
CSSParserMode Mode() const { return mode_; }
CSSParserMode MatchMode() const { return match_mode_; }
const KURL& BaseURL() const { return base_url_; }
const WTF::TextEncoding& Charset() const { return charset_; }
const Referrer& GetReferrer() const { return referrer_; }
bool IsAdRelated() const { return is_ad_related_; }
bool IsHTMLDocument() const { return is_html_document_; }
enum ResourceFetchRestriction ResourceFetchRestriction() const {
return resource_fetch_restriction_;
}
bool IsLiveProfile() const { return profile_ == kLiveProfile; }
bool IsOriginClean() const;
bool IsSecureContext() const;
// This quirk is to maintain compatibility with Android apps built on
// the Android SDK prior to and including version 18. Presumably, this
// can be removed any time after 2015. See http://crbug.com/277157.
bool UseLegacyBackgroundSizeShorthandBehavior() const {
return use_legacy_background_size_shorthand_behavior_;
}
// FIXME: This setter shouldn't exist, however the current lifetime of
// CSSParserContext is not well understood and thus we sometimes need to
// override this field.
void SetMode(CSSParserMode mode) { mode_ = mode; }
void SetIsAdRelated() { is_ad_related_ = true; }
KURL CompleteURL(const String& url) const;
SecureContextMode GetSecureContextMode() const {
return secure_context_mode_;
}
void Count(WebFeature) const;
void Count(CSSParserMode, CSSPropertyID) const;
void CountDeprecation(WebFeature) const;
bool IsUseCounterRecordingEnabled() const { return document_; }
bool IsDocumentHandleEqual(const Document* other) const;
const Document* GetDocument() const;
const ExecutionContext* GetExecutionContext() const;
network::mojom::CSPDisposition ShouldCheckContentSecurityPolicy() const {
return should_check_content_security_policy_;
}
// TODO(ekaramad): We currently only report @keyframes violations. We need to
// report CSS transitions as well (https://crbug.com/906147).
// TODO(ekaramad): We should provide a source location in the violation
// report (https://crbug.com/906150, ).
void ReportLayoutAnimationsViolationIfNeeded(const StyleRuleKeyframe&) const;
// TODO(yoichio): Remove when CustomElementsV0 is removed. crrev.com/660759.
bool CustomElementsV0Enabled() const;
bool IsForMarkupSanitization() const;
// Overrides |mode_| of a CSSParserContext within the scope, allowing us to
// switching parsing mode while parsing different parts of a style sheet.
// TODO(xiaochengh): This isn't the right approach, as it breaks the
// immutability of CSSParserContext. We should introduce some local context.
class ParserModeOverridingScope {
STACK_ALLOCATED();
public:
ParserModeOverridingScope(const CSSParserContext& context,
CSSParserMode mode)
: mode_reset_(const_cast<CSSParserMode*>(&context.mode_), mode) {}
private:
base::AutoReset<CSSParserMode> mode_reset_;
};
void Trace(Visitor*);
private:
friend class ParserModeOverridingScope;
KURL base_url_;
network::mojom::CSPDisposition should_check_content_security_policy_;
// If true, allows reading and modifying of the CSS rules.
// https://drafts.csswg.org/cssom/#concept-css-style-sheet-origin-clean-flag
const bool origin_clean_;
CSSParserMode mode_;
CSSParserMode match_mode_;
SelectorProfile profile_ = kLiveProfile;
Referrer referrer_;
// Whether the associated stylesheet's ResourceRequest is an ad resource. If
// there is no associated ResourceRequest, whether ad script is on the v8 call
// stack at stylesheet creation. Not set for presentation attributes.
bool is_ad_related_ = false;
bool is_html_document_;
bool use_legacy_background_size_shorthand_behavior_;
SecureContextMode secure_context_mode_;
WTF::TextEncoding charset_;
WeakMember<const Document> document_;
// Flag indicating whether images with a URL scheme other than "data" are
// allowed.
const enum ResourceFetchRestriction resource_fetch_restriction_;
};
CORE_EXPORT const CSSParserContext* StrictCSSParserContext(SecureContextMode);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_PARSER_CSS_PARSER_CONTEXT_H_
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