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tenfourfox/dom/html/HTMLAnchorElement.cpp

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/* -*- 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;
}
void
HTMLAnchorElement::GetItemValueText(DOMString& aValue)
{
GetHref(aValue);
}
void
HTMLAnchorElement::SetItemValueText(const nsAString& aValue)
{
SetHref(aValue);
}
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
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 (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)
{
return GetURIListAttr(nsGkAtoms::ping, aValue);
}
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
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