dom/html/HTMLAreaElement.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/HTMLAreaElement.h"
   8
   9 #include "mozilla/Attributes.h"
  10 #include "mozilla/dom/BindContext.h"
  11 #include "mozilla/dom/Document.h"
  12 #include "mozilla/dom/HTMLAnchorElement.h"
  13 #include "mozilla/dom/HTMLAreaElementBinding.h"
  14 #include "mozilla/EventDispatcher.h"
  15 #include "mozilla/MemoryReporting.h"
  16 #include "nsWindowSizes.h"
  17
  18 NS_IMPL_NS_NEW_HTML_ELEMENT(Area)
  19
  20 namespace mozilla::dom {
  21
  22 HTMLAreaElement::HTMLAreaElement(
  23     already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
  24     : nsGenericHTMLElement(std::move(aNodeInfo)), Link(this) {}
  25
  26 HTMLAreaElement::~HTMLAreaElement() = default;
  27
  28 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLAreaElement,
  29                                              nsGenericHTMLElement, Link)
  30
  31 NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLAreaElement, nsGenericHTMLElement,
  32                                    mRelList)
  33
  34 NS_IMPL_ELEMENT_CLONE(HTMLAreaElement)
  35
  36 int32_t HTMLAreaElement::TabIndexDefault() { return 0; }
  37
  38 void HTMLAreaElement::GetTarget(DOMString& aValue) {
  39   if (!GetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue)) {
  40     GetBaseTarget(aValue);
  41   }
  42 }
  43
  44 void HTMLAreaElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
  45   GetEventTargetParentForAnchors(aVisitor);
  46 }
  47
  48 nsresult HTMLAreaElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
  49   return PostHandleEventForAnchors(aVisitor);
  50 }
  51
  52 void HTMLAreaElement::GetLinkTarget(nsAString& aTarget) {
  53   GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
  54   if (aTarget.IsEmpty()) {
  55     GetBaseTarget(aTarget);
  56   }
  57 }
  58
  59 nsDOMTokenList* HTMLAreaElement::RelList() {
  60   if (!mRelList) {
  61     mRelList = new nsDOMTokenList(this, nsGkAtoms::rel, sSupportedRelValues);
  62   }
  63   return mRelList;
  64 }
  65
  66 nsresult HTMLAreaElement::BindToTree(BindContext& aContext, nsINode& aParent) {
  67   Link::ResetLinkState(false, Link::ElementHasHref());
  68   nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
  69   NS_ENSURE_SUCCESS(rv, rv);
  70
  71   if (IsInComposedDoc()) {
  72     aContext.OwnerDoc().RegisterPendingLinkUpdate(this);
  73   }
  74   return rv;
  75 }
  76
  77 void HTMLAreaElement::UnbindFromTree(bool aNullParent) {
  78   // Without removing the link state we risk a dangling pointer
  79   // in the mStyledLinks hashtable
  80   Link::ResetLinkState(false, Link::ElementHasHref());
  81
  82   nsGenericHTMLElement::UnbindFromTree(aNullParent);
  83 }
  84
  85 void HTMLAreaElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
  86                                    const nsAttrValue* aValue,
  87                                    const nsAttrValue* aOldValue,
  88                                    nsIPrincipal* aSubjectPrincipal,
  89                                    bool aNotify) {
  90   if (aNamespaceID == kNameSpaceID_None) {
  91     // This must happen after the attribute is set. We will need the updated
  92     // attribute value because notifying the document that content states have
  93     // changed will call IntrinsicState, which will try to get updated
  94     // information about the visitedness from Link.
  95     if (aName == nsGkAtoms::href) {
  96       Link::ResetLinkState(aNotify, !!aValue);
  97     }
  98   }
  99
 100   return nsGenericHTMLElement::AfterSetAttr(
 101       aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
 102 }
 103
 104 void HTMLAreaElement::ToString(nsAString& aSource) { GetHref(aSource); }
 105
 106 already_AddRefed<nsIURI> HTMLAreaElement::GetHrefURI() const {
 107   if (nsCOMPtr<nsIURI> uri = GetCachedURI()) {
 108     return uri.forget();
 109   }
 110   return GetHrefURIForAnchors();
 111 }
 112
 113 ElementState HTMLAreaElement::IntrinsicState() const {
 114   return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
 115 }
 116
 117 void HTMLAreaElement::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
 118                                              size_t* aNodeSize) const {
 119   nsGenericHTMLElement::AddSizeOfExcludingThis(aSizes, aNodeSize);
 120   *aNodeSize += Link::SizeOfExcludingThis(aSizes.mState);
 121 }
 122
 123 JSObject* HTMLAreaElement::WrapNode(JSContext* aCx,
 124                                     JS::Handle<JSObject*> aGivenProto) {
 125   return HTMLAreaElement_Binding::Wrap(aCx, this, aGivenProto);
 126 }
 127
 128 }  // namespace mozilla::dom