CSSPseudoElement.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 mozilla_dom_CSSPseudoElement_h

#define mozilla_dom_CSSPseudoElement_h

#include "js/TypeDecls.h"

#include "mozilla/Attributes.h"

#include "mozilla/dom/BindingDeclarations.h"

#include "mozilla/RefPtr.h"

#include "nsCSSPseudoElements.h"

#include "nsWrapperCache.h"

namespace mozilla::dom {

class Animation;

class Element;

class UnrestrictedDoubleOrKeyframeAnimationOptions;

class CSSPseudoElement final : public nsWrapperCache {

 public:

  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(CSSPseudoElement)

  NS_DECL_CYCLE_COLLECTION_NATIVE_WRAPPERCACHE_CLASS(CSSPseudoElement)

 protected:

  virtual ~CSSPseudoElement();

 public:

  ParentObject GetParentObject() const;

  virtual JSObject* WrapObject(JSContext* aCx,

                               JS::Handle<JSObject*> aGivenProto) override;

  PseudoStyleType GetType() const { return mPseudoType; }

  void GetType(nsString& aRetVal) const {

    MOZ_ASSERT(nsCSSPseudoElements::GetPseudoAtom(mPseudoType),

               "All pseudo-types allowed by this class should have a"

               " corresponding atom");

    // Our atoms use one colon and we would like to return two colons syntax

    // for the returned pseudo type string, so serialize this to the

    // non-deprecated two colon syntax.

    aRetVal.Assign(char16_t(':'));

    aRetVal.Append(

        nsDependentAtomString(nsCSSPseudoElements::GetPseudoAtom(mPseudoType)));

  dom::Element* Element() const { return mOriginatingElement.get(); }

  // Given an element:pseudoType pair, returns the CSSPseudoElement stored as a

  // property on |aElement|. If there is no CSSPseudoElement for the specified

  // pseudo-type on element, a new CSSPseudoElement will be created and stored

  // on the element.

  static already_AddRefed<CSSPseudoElement> GetCSSPseudoElement(

      dom::Element* aElement, PseudoStyleType aType);

 private:

  // Only ::before, ::after and ::marker are supported.

  CSSPseudoElement(dom::Element* aElement, PseudoStyleType aType);

  static nsAtom* GetCSSPseudoElementPropertyAtom(PseudoStyleType aType);

  // mOriginatingElement needs to be an owning reference since if script is

  // holding on to the pseudo-element, it needs to continue to be able to refer

  // to the originating element.

  RefPtr<dom::Element> mOriginatingElement;

  PseudoStyleType mPseudoType;

};

}  // namespace mozilla::dom

#endif  // mozilla_dom_CSSPseudoElement_h