dom/html/HTMLStyleElement.h
author Kris Maglione <maglione.k@gmail.com>
Tue, 07 Nov 2017 14:25:45 -0800
changeset 393294 77a3e035aca6aa11293db4514bc0c930d3c2f054
parent 393292 c77bc1a5218e984623f384dc0c9f72b644c4f093
child 397100 39d5991f02ba0e9950c380f91817fb9bac430d87
permissions -rw-r--r--
Bug 1415352: Part 4c - Use subject principal as the triggering principal for inline <style> nodes. r=bz This change captures the subject principal when a scripted caller sets the textContent or innerHTML property of a <style> node, and uses it as the triggering principal for the resulting stylesheet. If the node contents are modified in any way other than through textContent or innerHTML, the triggering principal is forgotten (which is an intentional design feature). MozReview-Commit-ID: GacZFIB5BzS

/* -*- 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 "nsGenericHTMLElement.h"
#include "nsStyleLinkElement.h"
#include "nsStubMutationObserver.h"

class nsIDocument;

namespace mozilla {
namespace dom {

class HTMLStyleElement final : public nsGenericHTMLElement,
                               public nsStyleLinkElement,
                               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)

  NS_IMETHOD GetInnerHTML(nsAString& aInnerHTML) override;
  using nsGenericHTMLElement::SetInnerHTML;
  virtual void SetInnerHTML(const nsAString& aInnerHTML,
                            nsIPrincipal& aSubjectPrincipal,
                            mozilla::ErrorResult& aError) override;
  virtual void SetTextContentInternal(const nsAString& aTextContent,
                                      nsIPrincipal* aSubjectPrincipal,
                                      mozilla::ErrorResult& aError) override;

  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                              nsIContent* aBindingParent,
                              bool aCompileEventHandlers) override;
  virtual void UnbindFromTree(bool aDeep = true,
                              bool aNullParent = true) override;
  virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
                                const nsAttrValue* aValue,
                                const nsAttrValue* aOldValue,
                                nsIPrincipal* aSubjectPrincipal,
                                bool aNotify) override;

  virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult,
                         bool aPreallocateChildren) const override;

  // nsIMutationObserver
  NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED

  bool Disabled();
  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);
  }
  bool Scoped()
  {
    return GetBoolAttr(nsGkAtoms::scoped);
  }
  void SetScoped(bool aScoped, ErrorResult& aError)
  {
    SetHTMLBoolAttr(nsGkAtoms::scoped, aScoped, aError);
  }

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

protected:
  virtual ~HTMLStyleElement();

  already_AddRefed<nsIURI> GetStyleSheetURL(bool* aIsInline, nsIPrincipal** aTriggeringPrincipal) override;
  void GetStyleSheetInfo(nsAString& aTitle,
                         nsAString& aType,
                         nsAString& aMedia,
                         bool* aIsScoped,
                         bool* aIsAlternate) override;
  /**
   * 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);
};

} // namespace dom
} // namespace mozilla

#endif