Quelle HTMLStyleElement.h Sprache: C

/* -*- 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_HTMLStyleElement_h
#define mozilla_dom_HTMLStyleElement_h

#include "mozilla/Attributes.h"
#include "mozilla/dom/LinkStyle.h"
#include "nsGenericHTMLElement.h"
#include "nsStubMutationObserver.h"

class nsDOMTokenList;

namespace mozilla::dom {

class HTMLStyleElement final : public nsGenericHTMLElement,
                               public LinkStyle,
                               public nsStubMutationObserver {
public:
  explicit HTMLStyleElement(
      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // CC
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLStyleElement,
                                           nsGenericHTMLElement)

  void GetInnerHTML(nsAString& aInnerHTML, OOMReporter& aError) override;
  using nsGenericHTMLElement::SetInnerHTML;

  void SetInnerHTMLTrusted(const nsAString& aInnerHTML,
                           nsIPrincipal* aSubjectPrincipal,
                           mozilla::ErrorResult& aError) override;

public:
  virtual void SetTextContentInternal(const nsAString& aTextContent,
                                      nsIPrincipal* aSubjectPrincipal,
                                      mozilla::ErrorResult& aError) override;
  /**
   * Mark this style element with a devtools-specific principal that
   * skips Content Security Policy unsafe-inline checks. This triggering
   * principal will be overwritten by any callers that set textContent
   * or innerHTML on this element.
   */
  void SetDevtoolsAsTriggeringPrincipal();

  virtual nsresult BindToTree(BindContext&, nsINode& aParent) override;
  virtual void UnbindFromTree(UnbindContext&) override;
  bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
                      const nsAString& aValue,
                      nsIPrincipal* aMaybeScriptedPrincipal,
                      nsAttrValue& aResult) override;
  virtual void AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
                            const nsAttrValue* aValue,
                            const nsAttrValue* aOldValue,
                            nsIPrincipal* aSubjectPrincipal,
                            bool aNotify) override;

  virtual nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;

  // nsIMutationObserver
  NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED

  bool Disabled() const;
  void SetDisabled(bool aDisabled);
  void GetMedia(nsAString& aValue) { GetHTMLAttr(nsGkAtoms::media, aValue); }
  void SetMedia(const nsAString& aMedia, ErrorResult& aError) {
    SetHTMLAttr(nsGkAtoms::media, aMedia, aError);
  }
  void GetType(nsAString& aValue) { GetHTMLAttr(nsGkAtoms::type, aValue); }
  void SetType(const nsAString& aType, ErrorResult& aError) {
    SetHTMLAttr(nsGkAtoms::type, aType, aError);
  }

  nsDOMTokenList* Blocking();
  bool IsPotentiallyRenderBlocking() override;

  virtual JSObject* WrapNode(JSContext* aCx,
                             JS::Handle<JSObject*> aGivenProto) override;

protected:
  virtual ~HTMLStyleElement();

  nsIContent& AsContent() final { return *this; }
  const LinkStyle* AsLinkStyle() const final { return this; }
  Maybe<SheetInfo> GetStyleSheetInfo() final;

  /**
   * Common method to call from the various mutation observer methods.
   * aContent is a content node that's either the one that changed or its
   * parent; we should only respond to the change if aContent is non-anonymous.
   */
  void ContentChanged(nsIContent* aContent);

  RefPtr<nsDOMTokenList> mBlocking;
};

}  // namespace mozilla::dom

#endif

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