gecko-dev/dom/svg/SVGStyleElement.cpp

/* -*- 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/. */

#include "mozilla/dom/Element.h"
#include "mozilla/dom/SVGStyleElement.h"
#include "nsContentUtils.h"
#include "mozilla/dom/SVGStyleElementBinding.h"

NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(Style)

namespace mozilla {
namespace dom {

JSObject*
SVGStyleElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
  return SVGStyleElementBinding::Wrap(aCx, this, aGivenProto);
}

//----------------------------------------------------------------------
// nsISupports methods

NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(SVGStyleElement,
                                             SVGStyleElementBase,
                                             nsIStyleSheetLinkingElement,
                                             nsIMutationObserver)

NS_IMPL_CYCLE_COLLECTION_CLASS(SVGStyleElement)

NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGStyleElement,
                                                  SVGStyleElementBase)
  tmp->nsStyleLinkElement::Traverse(cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGStyleElement,
                                                SVGStyleElementBase)
  tmp->nsStyleLinkElement::Unlink();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END

//----------------------------------------------------------------------
// Implementation

SVGStyleElement::SVGStyleElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
  : SVGStyleElementBase(aNodeInfo)
{
  AddMutationObserver(this);
}

SVGStyleElement::~SVGStyleElement()
{
}

//----------------------------------------------------------------------
// nsIDOMNode methods


NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGStyleElement)


//----------------------------------------------------------------------
// nsIContent methods

nsresult
SVGStyleElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                            nsIContent* aBindingParent,
                            bool aCompileEventHandlers)
{
  nsresult rv = SVGStyleElementBase::BindToTree(aDocument, aParent,
                                                aBindingParent,
                                                aCompileEventHandlers);
  NS_ENSURE_SUCCESS(rv, rv);

  void (SVGStyleElement::*update)() = &SVGStyleElement::UpdateStyleSheetInternal;
  nsContentUtils::AddScriptRunner(
    NewRunnableMethod("dom::SVGStyleElement::BindToTree", this, update));

  return rv;
}

void
SVGStyleElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
  nsCOMPtr<nsIDocument> oldDoc = GetUncomposedDoc();
  ShadowRoot* oldShadow = GetContainingShadow();
  SVGStyleElementBase::UnbindFromTree(aDeep, aNullParent);
  Unused << UpdateStyleSheetInternal(oldDoc, oldShadow);
}

nsresult
SVGStyleElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
                              const nsAttrValue* aValue,
                              const nsAttrValue* aOldValue,
                              nsIPrincipal* aMaybeScriptedPrincipal,
                              bool aNotify)
{
  if (aNameSpaceID == kNameSpaceID_None) {
    if (aName == nsGkAtoms::title ||
        aName == nsGkAtoms::media ||
        aName == nsGkAtoms::type) {
      Unused << UpdateStyleSheetInternal(nullptr, nullptr, ForceUpdate::Yes);
    }
  }

  return SVGStyleElementBase::AfterSetAttr(aNameSpaceID, aName, aValue,
                                           aOldValue, aMaybeScriptedPrincipal,
                                           aNotify);
}

bool
SVGStyleElement::ParseAttribute(int32_t aNamespaceID,
                                nsAtom* aAttribute,
                                const nsAString& aValue,
                                nsIPrincipal* aMaybeScriptedPrincipal,
                                nsAttrValue& aResult)
{
  if (aNamespaceID == kNameSpaceID_None &&
      aAttribute == nsGkAtoms::crossorigin) {
    ParseCORSValue(aValue, aResult);
    return true;
  }

  return SVGStyleElementBase::ParseAttribute(aNamespaceID, aAttribute, aValue,
                                             aMaybeScriptedPrincipal, aResult);
}

//----------------------------------------------------------------------
// nsIMutationObserver methods

void
SVGStyleElement::CharacterDataChanged(nsIContent* aContent,
                                      const CharacterDataChangeInfo&)
{
  ContentChanged(aContent);
}

void
SVGStyleElement::ContentAppended(nsIContent* aFirstNewContent)
{
  ContentChanged(aFirstNewContent->GetParent());
}

void
SVGStyleElement::ContentInserted(nsIContent* aChild)
{
  ContentChanged(aChild);
}

void
SVGStyleElement::ContentRemoved(nsIContent* aChild,
                                nsIContent* aPreviousSibling)
{
  ContentChanged(aChild);
}

void
SVGStyleElement::ContentChanged(nsIContent* aContent)
{
  if (nsContentUtils::IsInSameAnonymousTree(this, aContent)) {
    Unused << UpdateStyleSheetInternal(nullptr, nullptr);
  }
}

//----------------------------------------------------------------------

void
SVGStyleElement::GetXmlspace(nsAString & aXmlspace)
{
  GetAttr(kNameSpaceID_XML, nsGkAtoms::space, aXmlspace);
}

void
SVGStyleElement::SetXmlspace(const nsAString & aXmlspace, ErrorResult& rv)
{
  rv = SetAttr(kNameSpaceID_XML, nsGkAtoms::space, aXmlspace, true);
}

void
SVGStyleElement::GetMedia(nsAString & aMedia)
{
  GetAttr(nsGkAtoms::media, aMedia);
}

void
SVGStyleElement::SetMedia(const nsAString& aMedia, ErrorResult& rv)
{
  SetAttr(nsGkAtoms::media, aMedia, rv);
}

void
SVGStyleElement::GetType(nsAString & aType)
{
  GetAttr(nsGkAtoms::type, aType);
}

void
SVGStyleElement::SetType(const nsAString& aType, ErrorResult& rv)
{
  SetAttr(nsGkAtoms::type, aType, rv);
}

void
SVGStyleElement::GetTitle(nsAString & aTitle)
{
  GetAttr(nsGkAtoms::title, aTitle);
}

void
SVGStyleElement::SetTitle(const nsAString& aTitle, ErrorResult& rv)
{
  SetAttr(nsGkAtoms::title, aTitle, rv);
}

//----------------------------------------------------------------------
// nsStyleLinkElement methods

Maybe<nsStyleLinkElement::SheetInfo>
SVGStyleElement::GetStyleSheetInfo()
{
  nsAutoString title;
  GetAttr(kNameSpaceID_None, nsGkAtoms::title, title);
  title.CompressWhitespace();

  nsAutoString media;
  GetAttr(kNameSpaceID_None, nsGkAtoms::media, media);
  // The SVG spec is formulated in terms of the CSS2 spec,
  // which specifies that media queries are case insensitive.
  nsContentUtils::ASCIIToLower(media);

  // FIXME(emilio): Why doesn't this do the same as HTMLStyleElement?
  nsAutoString type;
  GetAttr(kNameSpaceID_None, nsGkAtoms::type, type);
  if (!type.IsEmpty() && !type.LowerCaseEqualsLiteral("text/css")) {
    return Nothing();
  }

  return Some(SheetInfo {
    *OwnerDoc(),
    this,
    nullptr,
    nullptr,
    net::ReferrerPolicy::RP_Unset,
    AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin)),
    title,
    media,
    HasAlternateRel::No,
    IsInline::Yes,
  });
}

} // namespace dom
} // namespace mozilla