CSSUnsupportedValue.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef LAYOUT_STYLE_TYPEDOM_CSSUNSUPPORTEDVALUE_H_

#define LAYOUT_STYLE_TYPEDOM_CSSUNSUPPORTEDVALUE_H_

#include "mozilla/CSSPropertyId.h"

#include "mozilla/RefPtr.h"

#include "mozilla/dom/CSSStyleValue.h"

template <class T>

class nsCOMPtr;

class nsISupports;

namespace mozilla {

class DeclarationBlock;

struct StyleUnsupportedValue;

namespace dom {

// https://drafts.css-houdini.org/css-typed-om/#reify-failure

//

// Represents a property value that cannot be reified into any of the

// supported CSSStyleValue subclasses. Per the spec, such values are still

// exposed as CSSStyleValue objects tied to their originating property,

// but they cannot be transferred to other properties.

class CSSUnsupportedValue final : public CSSStyleValue {

 public:

  CSSUnsupportedValue(nsCOMPtr<nsISupports> aParent,

                      const CSSPropertyId& aPropertyId,

                      RefPtr<DeclarationBlock> aDeclarations);

  static RefPtr<CSSUnsupportedValue> Create(

      nsCOMPtr<nsISupports> aParent, const CSSPropertyId& aPropertyId,

      StyleUnsupportedValue&& aUnsupportedValue);

  const CSSPropertyId& GetPropertyId() const { return mPropertyId; }

  CSSPropertyId& GetPropertyId() { return mPropertyId; }

  void ToCssTextWithProperty(const CSSPropertyId& aPropertyId,

                             nsACString& aDest) const;

 private:

  virtual ~CSSUnsupportedValue() = default;

  CSSPropertyId mPropertyId;

  RefPtr<DeclarationBlock> mDeclarations;

};

}  // namespace dom

}  // namespace mozilla

#endif  // LAYOUT_STYLE_TYPEDOM_CSSUNSUPPORTEDVALUE_H_