1 files changed, 234 insertions, 0 deletions
diff --git a/dom/html/HTMLAnchorElement.cpp b/dom/html/HTMLAnchorElement.cpp
new file mode 100644
index 0000000000..cdd22cfc74
--- /dev/null
+++ b/dom/html/HTMLAnchorElement.cpp
@@ -0,0 +1,234 @@
+/* -*- 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/HTMLAnchorElement.h"
+
+#include "mozilla/dom/BindContext.h"
+#include "mozilla/dom/HTMLAnchorElementBinding.h"
+#include "mozilla/dom/HTMLDNSPrefetch.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/MemoryReporting.h"
+#include "nsCOMPtr.h"
+#include "nsContentUtils.h"
+#include "nsGkAtoms.h"
+#include "nsAttrValueOrString.h"
+#include "mozilla/dom/Document.h"
+#include "nsPresContext.h"
+#include "nsIURI.h"
+#include "nsWindowSizes.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Anchor)
+
+namespace mozilla::dom {
+
+// static
+const DOMTokenListSupportedToken HTMLAnchorElement::sSupportedRelValues[] = {
+    "noreferrer", "noopener", nullptr};
+
+HTMLAnchorElement::~HTMLAnchorElement() {
+  SupportsDNSPrefetch::Destroyed(*this);
+}
+
+bool HTMLAnchorElement::IsInteractiveHTMLContent() const {
+  return HasAttr(kNameSpaceID_None, nsGkAtoms::href) ||
+         nsGenericHTMLElement::IsInteractiveHTMLContent();
+}
+
+NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLAnchorElement,
+                                             nsGenericHTMLElement, Link)
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLAnchorElement, nsGenericHTMLElement,
+                                   mRelList)
+
+NS_IMPL_ELEMENT_CLONE(HTMLAnchorElement)
+
+JSObject* HTMLAnchorElement::WrapNode(JSContext* aCx,
+                                      JS::Handle<JSObject*> aGivenProto) {
+  return HTMLAnchorElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+int32_t HTMLAnchorElement::TabIndexDefault() { return 0; }
+
+bool HTMLAnchorElement::Draggable() const {
+  // links can be dragged as long as there is an href and the
+  // draggable attribute isn't false
+  if (!HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
+    // no href, so just use the same behavior as other elements
+    return nsGenericHTMLElement::Draggable();
+  }
+
+  return !AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
+                      nsGkAtoms::_false, eIgnoreCase);
+}
+
+nsresult HTMLAnchorElement::BindToTree(BindContext& aContext,
+                                       nsINode& aParent) {
+  Link::ResetLinkState(false, Link::ElementHasHref());
+
+  nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Prefetch links
+  if (IsInComposedDoc()) {
+    aContext.OwnerDoc().RegisterPendingLinkUpdate(this);
+    TryDNSPrefetch(*this);
+  }
+
+  return rv;
+}
+
+void HTMLAnchorElement::UnbindFromTree(bool aNullParent) {
+  // Cancel any DNS prefetches
+  // Note: Must come before ResetLinkState.  If called after, it will recreate
+  // mCachedURI based on data that is invalid - due to a call to Link::GetURI()
+  // via GetURIForDNSPrefetch().
+  CancelDNSPrefetch(*this);
+
+  // Without removing the link state we risk a dangling pointer
+  // in the mStyledLinks hashtable
+  Link::ResetLinkState(false, Link::ElementHasHref());
+
+  nsGenericHTMLElement::UnbindFromTree(aNullParent);
+}
+
+bool HTMLAnchorElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
+                                        int32_t* aTabIndex) {
+  if (nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable,
+                                            aTabIndex)) {
+    return true;
+  }
+
+  // cannot focus links if there is no link handler
+  if (!OwnerDoc()->LinkHandlingEnabled()) {
+    *aIsFocusable = false;
+    return false;
+  }
+
+  // Links that are in an editable region should never be focusable, even if
+  // they are in a contenteditable="false" region.
+  if (nsContentUtils::IsNodeInEditableRegion(this)) {
+    if (aTabIndex) {
+      *aTabIndex = -1;
+    }
+
+    *aIsFocusable = false;
+
+    return true;
+  }
+
+  if (GetTabIndexAttrValue().isNothing()) {
+    // check whether we're actually a link
+    if (!IsLink()) {
+      // Not tabbable or focusable without href (bug 17605), unless
+      // forced to be via presence of nonnegative tabindex attribute
+      if (aTabIndex) {
+        *aTabIndex = -1;
+      }
+
+      *aIsFocusable = false;
+
+      return false;
+    }
+  }
+
+  if (aTabIndex && (sTabFocusModel & eTabFocus_linksMask) == 0) {
+    *aTabIndex = -1;
+  }
+
+  *aIsFocusable = true;
+
+  return false;
+}
+
+void HTMLAnchorElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
+  GetEventTargetParentForAnchors(aVisitor);
+}
+
+nsresult HTMLAnchorElement::PostHandleEvent(EventChainPostVisitor& aVisitor) {
+  return PostHandleEventForAnchors(aVisitor);
+}
+
+void HTMLAnchorElement::GetLinkTarget(nsAString& aTarget) {
+  GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
+  if (aTarget.IsEmpty()) {
+    GetBaseTarget(aTarget);
+  }
+}
+
+void HTMLAnchorElement::GetTarget(nsAString& aValue) const {
+  if (!GetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue)) {
+    GetBaseTarget(aValue);
+  }
+}
+
+nsDOMTokenList* HTMLAnchorElement::RelList() {
+  if (!mRelList) {
+    mRelList = new nsDOMTokenList(this, nsGkAtoms::rel, sSupportedRelValues);
+  }
+  return mRelList;
+}
+
+void HTMLAnchorElement::GetText(nsAString& aText,
+                                mozilla::ErrorResult& aRv) const {
+  if (NS_WARN_IF(
+          !nsContentUtils::GetNodeTextContent(this, true, aText, fallible))) {
+    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+  }
+}
+
+void HTMLAnchorElement::SetText(const nsAString& aText, ErrorResult& aRv) {
+  aRv = nsContentUtils::SetNodeTextContent(this, aText, false);
+}
+
+already_AddRefed<nsIURI> HTMLAnchorElement::GetHrefURI() const {
+  if (nsCOMPtr<nsIURI> uri = GetCachedURI()) {
+    return uri.forget();
+  }
+  return GetHrefURIForAnchors();
+}
+
+nsresult HTMLAnchorElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
+                                          const nsAttrValueOrString* aValue,
+                                          bool aNotify) {
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aName == nsGkAtoms::href) {
+      CancelDNSPrefetch(*this);
+    }
+  }
+
+  return nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName, aValue,
+                                             aNotify);
+}
+
+nsresult HTMLAnchorElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
+                                         const nsAttrValue* aValue,
+                                         const nsAttrValue* aOldValue,
+                                         nsIPrincipal* aSubjectPrincipal,
+                                         bool aNotify) {
+  if (aNamespaceID == kNameSpaceID_None) {
+    if (aName == nsGkAtoms::href) {
+      Link::ResetLinkState(aNotify, !!aValue);
+      if (aValue && IsInComposedDoc()) {
+        TryDNSPrefetch(*this);
+      }
+    }
+  }
+
+  return nsGenericHTMLElement::AfterSetAttr(
+      aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
+}
+
+ElementState HTMLAnchorElement::IntrinsicState() const {
+  return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
+}
+
+void HTMLAnchorElement::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
+                                               size_t* aNodeSize) const {
+  nsGenericHTMLElement::AddSizeOfExcludingThis(aSizes, aNodeSize);
+  *aNodeSize += Link::SizeOfExcludingThis(aSizes.mState);
+}
+
+}  // namespace mozilla::dom