css_unparsed_declaration_value.h | Explore in Territory

// Copyright 2015 The Chromium Authors
// 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_CSS_UNPARSED_DECLARATION_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_UNPARSED_DECLARATION_VALUE_H_

#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/css/css_value.h"
#include "third_party/blink/renderer/core/css/css_variable_data.h"
#include "third_party/blink/renderer/core/css/parser/css_parser_context.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"

namespace blink {

// This represents a CSS declaration value that we haven't fully parsed into
// a CSSValue, but left basically as untyped text (potentially for further
// parsing later). This can happen in one out of two cases:
//
//  - A CSS longhand property contains at least one variable reference, e.g.:
//    color: var(--x)
//  - A custom property with or without variable references, e.g.:
//    --foo: abc;
//
// The former will eventually be parsed in StyleCascade's apply step,
// when we know the correct value of all variables. The latter may never
// be further substituted at all.
//
// CSS shorthand properties containing at least one variable reference are
// represented by either CSSPendingSubstitutionValue (Blink) or CSSUnparsedValue
// (Typed CSSOM), which wraps this.
//
// https://drafts.csswg.org/css-syntax-3/#typedef-declaration-value
// https://drafts.csswg.org/css-variables/#defining-variables
class CORE_EXPORT CSSUnparsedDeclarationValue final : public CSSValue { … };

template <>
struct DowncastTraits<CSSUnparsedDeclarationValue> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_UNPARSED_DECLARATION_VALUE_H_
chromium/third_party/blink/renderer/core/css/css_unparsed_declaration_value.h
