gecko-dev/dom/html/HTMLAreaElement.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/HTMLAreaElement.h"

#include "mozilla/Attributes.h"
#include "mozilla/dom/BindContext.h"
#include "mozilla/dom/HTMLAnchorElement.h"
#include "mozilla/dom/HTMLAreaElementBinding.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventStates.h"
#include "mozilla/MemoryReporting.h"
#include "nsWindowSizes.h"

NS_IMPL_NS_NEW_HTML_ELEMENT(Area)

namespace mozilla {
namespace dom {

HTMLAreaElement::HTMLAreaElement(
    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
    : nsGenericHTMLElement(std::move(aNodeInfo)), Link(this) {}

HTMLAreaElement::~HTMLAreaElement() = default;

NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLAreaElement,
                                             nsGenericHTMLElement, Link)

NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLAreaElement, nsGenericHTMLElement,
                                   mRelList)

NS_IMPL_ELEMENT_CLONE(HTMLAreaElement)

int32_t HTMLAreaElement::TabIndexDefault() { return 0; }

void HTMLAreaElement::GetTarget(DOMString& aValue) {
  if (!GetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue)) {
    GetBaseTarget(aValue);
  }
}

void HTMLAreaElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
  GetEventTargetParentForAnchors(aVisitor);
}

nsresult HTMLAreaElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
  return PostHandleEventForAnchors(aVisitor);
}

bool HTMLAreaElement::IsLink(nsIURI** aURI) const { return IsHTMLLink(aURI); }

void HTMLAreaElement::GetLinkTarget(nsAString& aTarget) {
  GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
  if (aTarget.IsEmpty()) {
    GetBaseTarget(aTarget);
  }
}

nsDOMTokenList* HTMLAreaElement::RelList() {
  if (!mRelList) {
    mRelList = new nsDOMTokenList(this, nsGkAtoms::rel,
                                  HTMLAnchorElement::sSupportedRelValues);
  }
  return mRelList;
}

nsresult HTMLAreaElement::BindToTree(BindContext& aContext, nsINode& aParent) {
  Link::ResetLinkState(false, Link::ElementHasHref());
  nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
  NS_ENSURE_SUCCESS(rv, rv);

  if (IsInComposedDoc()) {
    aContext.OwnerDoc().RegisterPendingLinkUpdate(this);
  }
  return rv;
}

void HTMLAreaElement::UnbindFromTree(bool aNullParent) {
  // Without removing the link state we risk a dangling pointer
  // in the mStyledLinks hashtable
  Link::ResetLinkState(false, Link::ElementHasHref());

  nsGenericHTMLElement::UnbindFromTree(aNullParent);
}

nsresult HTMLAreaElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
                                       const nsAttrValue* aValue,
                                       const nsAttrValue* aOldValue,
                                       nsIPrincipal* aSubjectPrincipal,
                                       bool aNotify) {
  if (aNamespaceID == kNameSpaceID_None) {
    // This must happen after the attribute is set. We will need the updated
    // attribute value because notifying the document that content states have
    // changed will call IntrinsicState, which will try to get updated
    // information about the visitedness from Link.
    if (aName == nsGkAtoms::href) {
      Link::ResetLinkState(aNotify, !!aValue);
    }
  }

  return nsGenericHTMLElement::AfterSetAttr(
      aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
}

void HTMLAreaElement::ToString(nsAString& aSource) { GetHref(aSource); }

already_AddRefed<nsIURI> HTMLAreaElement::GetHrefURI() const {
  return GetHrefURIForAnchors();
}

EventStates HTMLAreaElement::IntrinsicState() const {
  return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
}

void HTMLAreaElement::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
                                             size_t* aNodeSize) const {
  nsGenericHTMLElement::AddSizeOfExcludingThis(aSizes, aNodeSize);
  *aNodeSize += Link::SizeOfExcludingThis(aSizes.mState);
}

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

}  // namespace dom
}  // namespace mozilla