1 files changed, 469 insertions, 0 deletions
diff --git a/dom/html/HTMLAnchorElement.cpp b/dom/html/HTMLAnchorElement.cpp
new file mode 100644
index 0000000000..a6cfacc53d
--- /dev/null
+++ b/dom/html/HTMLAnchorElement.cpp
@@ -0,0 +1,469 @@
+/* -*- 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/HTMLAnchorElementBinding.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/MemoryReporting.h"
+#include "nsCOMPtr.h"
+#include "nsContentUtils.h"
+#include "nsGkAtoms.h"
+#include "nsHTMLDNSPrefetch.h"
+#include "nsIDocument.h"
+#include "nsIPresShell.h"
+#include "nsPresContext.h"
+#include "nsIURI.h"
+
+NS_IMPL_NS_NEW_HTML_ELEMENT(Anchor)
+
+namespace mozilla {
+namespace dom {
+
+#define ANCHOR_ELEMENT_FLAG_BIT(n_) NODE_FLAG_BIT(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
+
+// Anchor element specific bits
+enum {
+  // Indicates that a DNS Prefetch has been requested from this Anchor elem
+  HTML_ANCHOR_DNS_PREFETCH_REQUESTED =    ANCHOR_ELEMENT_FLAG_BIT(0),
+
+  // Indicates that a DNS Prefetch was added to the deferral queue
+  HTML_ANCHOR_DNS_PREFETCH_DEFERRED =     ANCHOR_ELEMENT_FLAG_BIT(1)
+};
+
+ASSERT_NODE_FLAGS_SPACE(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 2);
+
+#undef ANCHOR_ELEMENT_FLAG_BIT
+
+// static
+const DOMTokenListSupportedToken HTMLAnchorElement::sSupportedRelValues[] = {
+  "noreferrer",
+  "noopener",
+  nullptr
+};
+
+HTMLAnchorElement::~HTMLAnchorElement()
+{
+}
+
+bool
+HTMLAnchorElement::IsInteractiveHTMLContent(bool aIgnoreTabindex) const
+{
+  return HasAttr(kNameSpaceID_None, nsGkAtoms::href) ||
+         nsGenericHTMLElement::IsInteractiveHTMLContent(aIgnoreTabindex);
+}
+
+NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLAnchorElement)
+  NS_INTERFACE_TABLE_INHERITED(HTMLAnchorElement,
+                               nsIDOMHTMLAnchorElement,
+                               Link)
+NS_INTERFACE_TABLE_TAIL_INHERITING(nsGenericHTMLElement)
+
+NS_IMPL_ADDREF_INHERITED(HTMLAnchorElement, Element)
+NS_IMPL_RELEASE_INHERITED(HTMLAnchorElement, Element)
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLAnchorElement)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLAnchorElement,
+                                                  nsGenericHTMLElement)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRelList)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLAnchorElement,
+                                                nsGenericHTMLElement)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mRelList)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_ELEMENT_CLONE(HTMLAnchorElement)
+
+JSObject*
+HTMLAnchorElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return HTMLAnchorElementBinding::Wrap(aCx, this, aGivenProto);
+}
+
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Charset, charset)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Coords, coords)
+NS_IMPL_URI_ATTR(HTMLAnchorElement, Href, href)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Hreflang, hreflang)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Name, name)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Rel, rel)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Rev, rev)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Shape, shape)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Type, type)
+NS_IMPL_STRING_ATTR(HTMLAnchorElement, Download, download)
+
+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);
+}
+
+void
+HTMLAnchorElement::OnDNSPrefetchRequested()
+{
+  UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
+  SetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
+}
+
+void
+HTMLAnchorElement::OnDNSPrefetchDeferred()
+{
+  UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
+  SetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
+}
+
+bool
+HTMLAnchorElement::HasDeferredDNSPrefetchRequest()
+{
+  return HasFlag(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
+}
+
+nsresult
+HTMLAnchorElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
+                              nsIContent* aBindingParent,
+                              bool aCompileEventHandlers)
+{
+  Link::ResetLinkState(false, Link::ElementHasHref());
+
+  nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
+                                                 aBindingParent,
+                                                 aCompileEventHandlers);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Prefetch links
+  nsIDocument* doc = GetComposedDoc();
+  if (doc) {
+    doc->RegisterPendingLinkUpdate(this);
+    TryDNSPrefetch();
+  }
+
+  return rv;
+}
+
+void
+HTMLAnchorElement::UnbindFromTree(bool aDeep, 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 GetHostname.
+  CancelDNSPrefetch(HTML_ANCHOR_DNS_PREFETCH_DEFERRED,
+                    HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
+
+  // If this link is ever reinserted into a document, it might
+  // be under a different xml:base, so forget the cached state now.
+  Link::ResetLinkState(false, Link::ElementHasHref());
+
+  // Note, we need to use OwnerDoc() here, since GetComposedDoc() might
+  // return null.
+  nsIDocument* doc = OwnerDoc();
+  if (doc) {
+    doc->UnregisterPendingLinkUpdate(this);
+  }
+
+  nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
+}
+
+static bool
+IsNodeInEditableRegion(nsINode* aNode)
+{
+  while (aNode) {
+    if (aNode->IsEditable()) {
+      return true;
+    }
+    aNode = aNode->GetParent();
+  }
+  return false;
+}
+
+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
+  nsIDocument* doc = GetComposedDoc();
+  if (doc) {
+    nsIPresShell* presShell = doc->GetShell();
+    if (presShell) {
+      nsPresContext* presContext = presShell->GetPresContext();
+      if (presContext && !presContext->GetLinkHandler()) {
+        *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 (IsNodeInEditableRegion(this)) {
+    if (aTabIndex) {
+      *aTabIndex = -1;
+    }
+
+    *aIsFocusable = false;
+
+    return true;
+  }
+
+  if (!HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
+    // check whether we're actually a link
+    if (!Link::HasURI()) {
+      // 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;
+}
+
+nsresult
+HTMLAnchorElement::PreHandleEvent(EventChainPreVisitor& aVisitor)
+{
+  return PreHandleEventForAnchors(aVisitor);
+}
+
+nsresult
+HTMLAnchorElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
+{
+  return PostHandleEventForAnchors(aVisitor);
+}
+
+bool
+HTMLAnchorElement::IsLink(nsIURI** aURI) const
+{
+  return IsHTMLLink(aURI);
+}
+
+void
+HTMLAnchorElement::GetLinkTarget(nsAString& aTarget)
+{
+  GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
+  if (aTarget.IsEmpty()) {
+    GetBaseTarget(aTarget);
+  }
+}
+
+NS_IMETHODIMP
+HTMLAnchorElement::GetTarget(nsAString& aValue)
+{
+  if (!GetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue)) {
+    GetBaseTarget(aValue);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLAnchorElement::SetTarget(const nsAString& aValue)
+{
+  return SetAttr(kNameSpaceID_None, nsGkAtoms::target, aValue, true);
+}
+
+nsDOMTokenList*
+HTMLAnchorElement::RelList()
+{
+  if (!mRelList) {
+    mRelList = new nsDOMTokenList(this, nsGkAtoms::rel, sSupportedRelValues);
+  }
+  return mRelList;
+}
+
+#define IMPL_URI_PART(_part)                                 \
+  NS_IMETHODIMP                                              \
+  HTMLAnchorElement::Get##_part(nsAString& a##_part)         \
+  {                                                          \
+    Link::Get##_part(a##_part);                              \
+    return NS_OK;                                            \
+  }                                                          \
+  NS_IMETHODIMP                                              \
+  HTMLAnchorElement::Set##_part(const nsAString& a##_part)   \
+  {                                                          \
+    Link::Set##_part(a##_part);                              \
+    return NS_OK;                                            \
+  }
+
+IMPL_URI_PART(Protocol)
+IMPL_URI_PART(Host)
+IMPL_URI_PART(Hostname)
+IMPL_URI_PART(Pathname)
+IMPL_URI_PART(Search)
+IMPL_URI_PART(Port)
+IMPL_URI_PART(Hash)
+
+#undef IMPL_URI_PART
+
+NS_IMETHODIMP    
+HTMLAnchorElement::GetText(nsAString& aText)
+{
+  if(!nsContentUtils::GetNodeTextContent(this, true, aText, fallible)) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP    
+HTMLAnchorElement::SetText(const nsAString& aText)
+{
+  return nsContentUtils::SetNodeTextContent(this, aText, false);
+}
+
+NS_IMETHODIMP
+HTMLAnchorElement::ToString(nsAString& aSource)
+{
+  return GetHref(aSource);
+}
+
+NS_IMETHODIMP
+HTMLAnchorElement::GetPing(nsAString& aValue)
+{
+  GetAttr(kNameSpaceID_None, nsGkAtoms::ping, aValue);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+HTMLAnchorElement::SetPing(const nsAString& aValue)
+{
+  return SetAttr(kNameSpaceID_None, nsGkAtoms::ping, aValue, true);
+}
+
+already_AddRefed<nsIURI>
+HTMLAnchorElement::GetHrefURI() const
+{
+  nsCOMPtr<nsIURI> uri = Link::GetCachedURI();
+  if (uri) {
+    return uri.forget();
+  }
+
+  return GetHrefURIForAnchors();
+}
+
+nsresult
+HTMLAnchorElement::SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
+                           nsIAtom* aPrefix, const nsAString& aValue,
+                           bool aNotify)
+{
+  bool reset = false;
+  if (aName == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID) {
+    // If we do not have a cached URI, we have some value here so we must reset
+    // our link state after calling the parent.
+    if (!Link::HasCachedURI()) {
+      reset = true;
+    }
+    // However, if we have a cached URI, we'll want to see if the value changed.
+    else {
+      nsAutoString val;
+      GetHref(val);
+      if (!val.Equals(aValue)) {
+        reset = true;
+      }
+    }
+    if (reset) {
+      CancelDNSPrefetch(HTML_ANCHOR_DNS_PREFETCH_DEFERRED,
+                        HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
+    }
+  }
+
+  nsresult rv = nsGenericHTMLElement::SetAttr(aNameSpaceID, aName, aPrefix,
+                                              aValue, aNotify);
+
+  // The ordering of the parent class's SetAttr call and Link::ResetLinkState
+  // is important here!  The attribute is not set until SetAttr returns, and
+  // 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 (reset) {
+    Link::ResetLinkState(!!aNotify, true);
+    if (IsInComposedDoc()) {
+      TryDNSPrefetch();
+    }
+  }
+
+  return rv;
+}
+
+nsresult
+HTMLAnchorElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
+                             bool aNotify)
+{
+  bool href =
+    (aAttribute == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID);
+
+  if (href) {
+    CancelDNSPrefetch(HTML_ANCHOR_DNS_PREFETCH_DEFERRED,
+                      HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
+  }
+
+  nsresult rv = nsGenericHTMLElement::UnsetAttr(aNameSpaceID, aAttribute,
+                                                aNotify);
+
+  // The ordering of the parent class's UnsetAttr call and Link::ResetLinkState
+  // is important here!  The attribute is not unset until UnsetAttr returns, and
+  // 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 (href) {
+    Link::ResetLinkState(!!aNotify, false);
+  }
+
+  return rv;
+}
+
+bool
+HTMLAnchorElement::ParseAttribute(int32_t aNamespaceID,
+                                  nsIAtom* aAttribute,
+                                  const nsAString& aValue,
+                                  nsAttrValue& aResult)
+{
+  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
+                                              aResult);
+}
+
+EventStates
+HTMLAnchorElement::IntrinsicState() const
+{
+  return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
+}
+
+size_t
+HTMLAnchorElement::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+{
+  return nsGenericHTMLElement::SizeOfExcludingThis(aMallocSizeOf) +
+         Link::SizeOfExcludingThis(aMallocSizeOf);
+}
+
+} // namespace dom
+} // namespace mozilla