зеркало из https://github.com/mozilla/gecko-dev.git
469 строки
13 KiB
C++
469 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim:set tw=80 expandtab softtabstop=2 ts=2 sw=2: */
|
|
/* 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
|
|
|
|
HTMLAnchorElement::~HTMLAnchorElement()
|
|
{
|
|
}
|
|
|
|
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)
|
|
tmp->Link::Traverse(cb);
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRelList)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLAnchorElement,
|
|
nsGenericHTMLElement)
|
|
tmp->Link::Unlink();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mRelList)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
NS_IMPL_ELEMENT_CLONE(HTMLAnchorElement)
|
|
|
|
JSObject*
|
|
HTMLAnchorElement::WrapNode(JSContext *aCx)
|
|
{
|
|
return HTMLAnchorElementBinding::Wrap(aCx, this);
|
|
}
|
|
|
|
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);
|
|
if (nsHTMLDNSPrefetch::IsAllowed(OwnerDoc())) {
|
|
nsHTMLDNSPrefetch::PrefetchLow(this);
|
|
}
|
|
}
|
|
|
|
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.
|
|
|
|
// If prefetch was deferred, clear flag and move on
|
|
if (HasFlag(HTML_ANCHOR_DNS_PREFETCH_DEFERRED))
|
|
UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_DEFERRED);
|
|
// Else if prefetch was requested, clear flag and send cancellation
|
|
else if (HasFlag(HTML_ANCHOR_DNS_PREFETCH_REQUESTED)) {
|
|
UnsetFlags(HTML_ANCHOR_DNS_PREFETCH_REQUESTED);
|
|
// Possible that hostname could have changed since binding, but since this
|
|
// covers common cases, most DNS prefetch requests will be canceled
|
|
nsHTMLDNSPrefetch::CancelPrefetchLow(this, NS_ERROR_ABORT);
|
|
}
|
|
|
|
// 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);
|
|
}
|
|
return mRelList;
|
|
}
|
|
|
|
#define IMPL_URI_PART(_part) \
|
|
NS_IMETHODIMP \
|
|
HTMLAnchorElement::Get##_part(nsAString& a##_part) \
|
|
{ \
|
|
ErrorResult rv; \
|
|
Link::Get##_part(a##_part, rv); \
|
|
MOZ_ASSERT(!rv.Failed()); \
|
|
return NS_OK; \
|
|
} \
|
|
NS_IMETHODIMP \
|
|
HTMLAnchorElement::Set##_part(const nsAString& a##_part) \
|
|
{ \
|
|
ErrorResult rv; \
|
|
Link::Set##_part(a##_part, rv); \
|
|
MOZ_ASSERT(!rv.Failed()); \
|
|
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)) {
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
HTMLAnchorElement::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
|
|
bool aNotify)
|
|
{
|
|
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 (aAttribute == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID) {
|
|
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 mozilla
|
|
} // namespace dom
|