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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
* All rights reserved.
* Copyright (C) 2013 Google 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.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_RESOLVER_MATCH_RESULT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_RESOLVER_MATCH_RESULT_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/css/resolver/cascade_expansion.h"
#include "third_party/blink/renderer/core/css/resolver/cascade_filter.h"
#include "third_party/blink/renderer/core/css/resolver/cascade_origin.h"
#include "third_party/blink/renderer/core/css/resolver/cascade_priority.h"
#include "third_party/blink/renderer/core/css/rule_set.h"
#include "third_party/blink/renderer/core/css/selector_checker.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class CSSPropertyValueSet;
struct CORE_EXPORT MatchedProperties {
DISALLOW_NEW();
public:
MatchedProperties();
void Trace(Visitor*) const;
Member<CSSPropertyValueSet> properties;
struct Data {
unsigned link_match_type : 2;
unsigned valid_property_filter : 3;
CascadeOrigin origin;
// This is approximately equivalent to the 'shadow-including tree order'.
// It can be used to evaluate the 'Shadow Tree' criteria. Note that the
// number stored here is 'local' to each origin (user, author), and is
// not used at all for the UA origin. Hence, it is not possible to compare
// tree_orders from two different origins.
//
// https://drafts.csswg.org/css-scoping/#shadow-cascading
uint16_t tree_order;
};
Data types_;
};
} // namespace blink
WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::MatchedProperties)
namespace blink {
using MatchedPropertiesVector = HeapVector<MatchedProperties, 64>;
class MatchedExpansionsIterator {
STACK_ALLOCATED();
using Iterator = MatchedPropertiesVector::const_iterator;
public:
MatchedExpansionsIterator(Iterator iterator,
const Document& document,
CascadeFilter filter,
size_t index)
: iterator_(iterator),
document_(document),
filter_(filter),
index_(index) {}
void operator++() {
iterator_++;
index_++;
}
bool operator==(const MatchedExpansionsIterator& o) const {
return iterator_ == o.iterator_;
}
bool operator!=(const MatchedExpansionsIterator& o) const {
return iterator_ != o.iterator_;
}
CascadeExpansion operator*() const {
return CascadeExpansion(*iterator_, document_, filter_, index_);
}
private:
Iterator iterator_;
const Document& document_;
CascadeFilter filter_;
size_t index_;
};
class MatchedExpansionsRange {
STACK_ALLOCATED();
public:
MatchedExpansionsRange(MatchedExpansionsIterator begin,
MatchedExpansionsIterator end)
: begin_(begin), end_(end) {}
MatchedExpansionsIterator begin() const { return begin_; }
MatchedExpansionsIterator end() const { return end_; }
private:
MatchedExpansionsIterator begin_;
MatchedExpansionsIterator end_;
};
class CORE_EXPORT MatchResult {
STACK_ALLOCATED();
public:
MatchResult() = default;
MatchResult(const MatchResult&) = delete;
MatchResult& operator=(const MatchResult&) = delete;
void AddMatchedProperties(
const CSSPropertyValueSet* properties,
unsigned link_match_type = CSSSelector::kMatchAll,
ValidPropertyFilter = ValidPropertyFilter::kNoFilter);
bool HasMatchedProperties() const { return matched_properties_.size(); }
void FinishAddingUARules();
void FinishAddingUserRules();
void FinishAddingAuthorRulesForTreeScope(const TreeScope&);
void SetIsCacheable(bool cacheable) { is_cacheable_ = cacheable; }
bool IsCacheable() const { return is_cacheable_; }
void SetDependsOnContainerQueries() { depends_on_container_queries_ = true; }
bool DependsOnContainerQueries() const {
return depends_on_container_queries_;
}
MatchedExpansionsRange Expansions(const Document&, CascadeFilter) const;
const MatchedPropertiesVector& GetMatchedProperties() const {
return matched_properties_;
}
// Reset the MatchResult to its initial state, as if no MatchedProperties
// objects were added.
void Reset();
const TreeScope& ScopeFromTreeOrder(uint16_t tree_order) const {
SECURITY_DCHECK(tree_order < tree_scopes_.size());
return *tree_scopes_[tree_order];
}
private:
MatchedPropertiesVector matched_properties_;
HeapVector<Member<const TreeScope>, 4> tree_scopes_;
bool is_cacheable_{true};
bool depends_on_container_queries_{false};
CascadeOrigin current_origin_{CascadeOrigin::kUserAgent};
uint16_t current_tree_order_{0};
};
inline bool operator==(const MatchedProperties& a, const MatchedProperties& b) {
return a.properties == b.properties &&
a.types_.link_match_type == b.types_.link_match_type;
}
inline bool operator!=(const MatchedProperties& a, const MatchedProperties& b) {
return !(a == b);
}
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_RESOLVER_MATCH_RESULT_H_
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