chromium/third_party/blink/renderer/core/css/resolver/cascade_map.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_RESOLVER_CASCADE_MAP_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_RESOLVER_CASCADE_MAP_H_

#include "base/check_op.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_property_name.h"
#include "third_party/blink/renderer/core/css/css_property_names.h"
#include "third_party/blink/renderer/core/css/properties/css_bitset.h"
#include "third_party/blink/renderer/core/css/resolver/cascade_priority.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"

namespace blink {

// Optimized map from CSSPropertyNames to CascadePriority.
//
// Because using a HashMap for everything is quite expensive in terms of
// performance, this class stores standard (non-custom) properties in a fixed-
// size array, and only custom properties are stored in a HashMap.
class CORE_EXPORT CascadeMap { … };

// CascadePriorityList implementation is inlined for performance reasons.

inline CascadeMap::CascadePriorityList::Iterator::Iterator(
    const BackingVector* backing_vector,
    const Node* node)
    : … { … }

inline const CascadePriority&
CascadeMap::CascadePriorityList::Iterator::operator*() const { … }

inline const CascadePriority*
CascadeMap::CascadePriorityList::Iterator::operator->() const { … }

inline CascadeMap::CascadePriorityList::Iterator&
CascadeMap::CascadePriorityList::Iterator::operator++() { … }

inline bool CascadeMap::CascadePriorityList::Iterator::operator!=(
    const Iterator& other) const { … }

inline CascadeMap::CascadePriorityList::Iterator
CascadeMap::CascadePriorityList ::Begin(
    const BackingVector& backing_vector) const { … }

inline CascadeMap::CascadePriorityList::Iterator
CascadeMap::CascadePriorityList::End(
    const BackingVector& backing_vector) const { … }

inline const CascadePriority& CascadeMap::CascadePriorityList::Top(
    const BackingVector& backing_vector) const { … }

inline CascadePriority& CascadeMap::CascadePriorityList::Top(
    BackingVector& backing_vector) { … }

inline void CascadeMap::CascadePriorityList::Push(BackingVector& backing_vector,
                                                  CascadePriority priority) { … }

inline bool CascadeMap::CascadePriorityList::IsEmpty() const { … }

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_RESOLVER_CASCADE_MAP_H_