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// Copyright 2021 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_STYLE_STYLE_CACHED_DATA_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_CACHED_DATA_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class ComputedStyle;
using PseudoElementStyleCache = Vector<scoped_refptr<const ComputedStyle>, 4>;
class CORE_EXPORT StyleCachedData final {
private:
friend class ComputedStyle;
// This cache stores ComputedStyles for pseudo elements originating from this
// ComputedStyle's element. Pseudo elements which are represented by
// PseudoElement in DOM store the ComputedStyle on those elements, so this
// cache is for:
//
// 1. Pseudo elements which do not generate a PseudoElement internally like
// ::first-line and ::selection.
//
// 2. Pseudo element style requested from getComputedStyle() where the element
// currently doesn't generate a PseudoElement. E.g.:
//
// <style>
// #div::before { color: green /* no content property! */}
// </style>
// <div id=div></div>
// <script>
// getComputedStyle(div, "::before").color // still green.
// </script>
std::unique_ptr<PseudoElementStyleCache> pseudo_element_styles_;
// Stores the names of of all custom properties on a given ComputedStyle.
std::unique_ptr<Vector<AtomicString>> variable_names_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_CACHED_DATA_H_
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