Quelle HTMLEmbedElement.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_HTMLEmbedElement_h
#define mozilla_dom_HTMLEmbedElement_h

#include "mozilla/Attributes.h"
#include "nsGenericHTMLElement.h"
#include "nsObjectLoadingContent.h"
#include "nsGkAtoms.h"
#include "nsError.h"

namespace mozilla::dom {

class HTMLEmbedElement final : public nsGenericHTMLElement,
                               public nsObjectLoadingContent {
public:
  explicit HTMLEmbedElement(
      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
      mozilla::dom::FromParser aFromParser = mozilla::dom::NOT_FROM_PARSER);

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED
  NS_IMPL_FROMNODE_HTML_WITH_TAG(HTMLEmbedElement, embed)

  bool AllowFullscreen() const {
    // We don't need to check prefixed attributes because Flash does not support
    // them.
    return IsRewrittenYoutubeEmbed() && GetBoolAttr(nsGkAtoms::allowfullscreen);
  }

  // nsObjectLoadingContent
  const Element* AsElement() const final { return this; }

  nsresult BindToTree(BindContext&, nsINode& aParent) override;
  void UnbindFromTree(UnbindContext&) override;

  bool IsHTMLFocusable(IsFocusableFlags, bool* aIsFocusable,
                       int32_t* aTabIndex) override;

  int32_t TabIndexDefault() override;

  bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
                      const nsAString& aValue,
                      nsIPrincipal* aMaybeScriptedPrincipal,
                      nsAttrValue& aResult) override;
  nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
  NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
  void DestroyContent() override;

  // nsObjectLoadingContent
  uint32_t GetCapabilities() const override;

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

  nsresult CopyInnerTo(HTMLEmbedElement* aDest);

  void StartObjectLoad() { StartObjectLoad(true, false); }

  virtual bool IsInteractiveHTMLContent() const override { return true; }

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLEmbedElement,
                                           nsGenericHTMLElement)

  // WebIDL <embed> api
  void GetAlign(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::align, aValue); }
  void SetAlign(const nsAString& aValue, ErrorResult& aRv) {
    SetHTMLAttr(nsGkAtoms::align, aValue, aRv);
  }
  void GetHeight(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::height, aValue); }
  void SetHeight(const nsAString& aValue, ErrorResult& aRv) {
    SetHTMLAttr(nsGkAtoms::height, aValue, aRv);
  }
  void GetName(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::name, aValue); }
  void SetName(const nsAString& aValue, ErrorResult& aRv) {
    SetHTMLAttr(nsGkAtoms::name, aValue, aRv);
  }
  void GetWidth(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::width, aValue); }
  void SetWidth(const nsAString& aValue, ErrorResult& aRv) {
    SetHTMLAttr(nsGkAtoms::width, aValue, aRv);
  }
  // WebIDL <embed> api
  void GetSrc(DOMString& aValue) {
    GetURIAttr(nsGkAtoms::src, nullptr, aValue);
  }
  void SetSrc(const nsAString& aValue, ErrorResult& aRv) {
    SetHTMLAttr(nsGkAtoms::src, aValue, aRv);
  }
  void GetType(DOMString& aValue) { GetHTMLAttr(nsGkAtoms::type, aValue); }
  void SetType(const nsAString& aValue, ErrorResult& aRv) {
    SetHTMLAttr(nsGkAtoms::type, aValue, aRv);
  }
  Document* GetSVGDocument(nsIPrincipal& aSubjectPrincipal) {
    return GetContentDocument(aSubjectPrincipal);
  }

  /**
   * Calls LoadObject with the correct arguments to start the plugin load.
   */
  void StartObjectLoad(bool aNotify, bool aForceLoad);

protected:
  void AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
                    const nsAttrValue* aValue, const nsAttrValue* aOldValue,
                    nsIPrincipal* aSubjectPrincipal, bool aNotify) override;
  void OnAttrSetButNotChanged(int32_t aNamespaceID, nsAtom* aName,
                              const nsAttrValueOrString& aValue,
                              bool aNotify) override;

private:
  ~HTMLEmbedElement();

  nsContentPolicyType GetContentPolicyType() const override;

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

  static void MapAttributesIntoRule(MappedDeclarationsBuilder&);

  /**
   * This function is called by AfterSetAttr and OnAttrSetButNotChanged.
   * It will not be called if the value is being unset.
   *
   * @param aNamespaceID the namespace of the attr being set
   * @param aName the localname of the attribute being set
   * @param aNotify Whether we plan to notify document observers.
   */
  void AfterMaybeChangeAttr(int32_t aNamespaceID, nsAtom* aName, bool aNotify);
};

}  // namespace mozilla::dom

#endif  // mozilla_dom_HTMLEmbedElement_h

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