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/*
* Copyright (C) 2025 Shopify Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/Box.h>
#include <wtf/RefCounted.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/URL.h>
#include <wtf/Variant.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
enum class ReferrerPolicy : uint8_t;
// https://wicg.github.io/nav-speculation/speculation-rules.html
class SpeculationRules : public RefCounted<SpeculationRules> {
public:
// https://wicg.github.io/nav-speculation/speculation-rules.html#valid-eagerness-strings
enum class Eagerness : uint8_t {
Immediate,
Eager,
Moderate,
Conservative,
};
// https://wicg.github.io/nav-speculation/speculation-rules.html#document-rule-predicate
struct DocumentPredicate;
struct URLPatternPredicate {
Vector<String> patterns;
};
struct CSSSelectorPredicate {
Vector<String> selectors;
};
struct Conjunction {
Vector<DocumentPredicate> clauses;
};
struct Disjunction {
Vector<DocumentPredicate> clauses;
};
struct Negation {
Box<DocumentPredicate> clause;
};
struct DocumentPredicate {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(DocumentPredicate);
public:
using PredicateVariant = WTF::Variant<URLPatternPredicate, CSSSelectorPredicate, Box<Conjunction>, Box<Disjunction>, Box<Negation>>;
DocumentPredicate(PredicateVariant&& value);
DocumentPredicate(DocumentPredicate&&) = default;
DocumentPredicate& operator=(DocumentPredicate&&) = default;
const PredicateVariant& value() const;
private:
PredicateVariant m_value;
};
// https://wicg.github.io/nav-speculation/speculation-rules.html#speculation-rule
struct Rule {
Vector<URL> urls;
std::optional<DocumentPredicate> predicate;
Eagerness eagerness;
std::optional<ReferrerPolicy> referrerPolicy;
Vector<String> tags;
Vector<String> requirements;
String noVarySearchHint;
};
static Ref<SpeculationRules> create();
// https://wicg.github.io/nav-speculation/speculation-rules.html#parse-speculation-rules
WEBCORE_EXPORT bool parseSpeculationRules(const StringView&, const URL& rulesetBaseURL, const URL& documentBaseURL);
const Vector<Rule>& prefetchRules() const;
private:
SpeculationRules() = default;
Vector<Rule> m_prefetchRules;
};
} // namespace WebCore
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