forked from mirrors/gecko-dev
531 lines
16 KiB
C++
531 lines
16 KiB
C++
/* -*- 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/HTMLLinkElement.h"
|
|
|
|
#include "mozilla/AsyncEventDispatcher.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/EventDispatcher.h"
|
|
#include "mozilla/EventStates.h"
|
|
#include "mozilla/MemoryReporting.h"
|
|
#include "mozilla/Preferences.h"
|
|
#include "mozilla/dom/HTMLLinkElementBinding.h"
|
|
#include "nsContentUtils.h"
|
|
#include "nsGenericHTMLElement.h"
|
|
#include "nsGkAtoms.h"
|
|
#include "nsDOMTokenList.h"
|
|
#include "nsIContentInlines.h"
|
|
#include "nsIDocument.h"
|
|
#include "nsIDOMEvent.h"
|
|
#include "nsIDOMStyleSheet.h"
|
|
#include "nsINode.h"
|
|
#include "nsIStyleSheetLinkingElement.h"
|
|
#include "nsIURL.h"
|
|
#include "nsPIDOMWindow.h"
|
|
#include "nsReadableUtils.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsStyleLinkElement.h"
|
|
#include "nsUnicharUtils.h"
|
|
|
|
#define LINK_ELEMENT_FLAG_BIT(n_) \
|
|
NODE_FLAG_BIT(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
|
|
|
|
// Link element specific bits
|
|
enum {
|
|
// Indicates that a DNS Prefetch has been requested from this Link element.
|
|
HTML_LINK_DNS_PREFETCH_REQUESTED = LINK_ELEMENT_FLAG_BIT(0),
|
|
|
|
// Indicates that a DNS Prefetch was added to the deferral queue
|
|
HTML_LINK_DNS_PREFETCH_DEFERRED = LINK_ELEMENT_FLAG_BIT(1)
|
|
};
|
|
|
|
#undef LINK_ELEMENT_FLAG_BIT
|
|
|
|
ASSERT_NODE_FLAGS_SPACE(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 2);
|
|
|
|
NS_IMPL_NS_NEW_HTML_ELEMENT(Link)
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
HTMLLinkElement::HTMLLinkElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
|
|
: nsGenericHTMLElement(aNodeInfo)
|
|
, Link(this)
|
|
{
|
|
}
|
|
|
|
HTMLLinkElement::~HTMLLinkElement()
|
|
{
|
|
}
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLLinkElement)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLLinkElement,
|
|
nsGenericHTMLElement)
|
|
tmp->nsStyleLinkElement::Traverse(cb);
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRelList)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLLinkElement,
|
|
nsGenericHTMLElement)
|
|
tmp->nsStyleLinkElement::Unlink();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mRelList)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
|
|
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(HTMLLinkElement,
|
|
nsGenericHTMLElement,
|
|
nsIStyleSheetLinkingElement,
|
|
Link)
|
|
|
|
NS_IMPL_ELEMENT_CLONE(HTMLLinkElement)
|
|
|
|
bool
|
|
HTMLLinkElement::Disabled()
|
|
{
|
|
StyleSheet* ss = GetSheet();
|
|
return ss && ss->Disabled();
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::SetDisabled(bool aDisabled)
|
|
{
|
|
if (StyleSheet* ss = GetSheet()) {
|
|
ss->SetDisabled(aDisabled);
|
|
}
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::OnDNSPrefetchRequested()
|
|
{
|
|
UnsetFlags(HTML_LINK_DNS_PREFETCH_DEFERRED);
|
|
SetFlags(HTML_LINK_DNS_PREFETCH_REQUESTED);
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::OnDNSPrefetchDeferred()
|
|
{
|
|
UnsetFlags(HTML_LINK_DNS_PREFETCH_REQUESTED);
|
|
SetFlags(HTML_LINK_DNS_PREFETCH_DEFERRED);
|
|
}
|
|
|
|
bool
|
|
HTMLLinkElement::HasDeferredDNSPrefetchRequest()
|
|
{
|
|
return HasFlag(HTML_LINK_DNS_PREFETCH_DEFERRED);
|
|
}
|
|
|
|
nsresult
|
|
HTMLLinkElement::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);
|
|
|
|
// Link must be inert in ShadowRoot.
|
|
if (aDocument && !GetContainingShadow()) {
|
|
aDocument->RegisterPendingLinkUpdate(this);
|
|
}
|
|
|
|
if (IsInComposedDoc()) {
|
|
TryDNSPrefetchOrPreconnectOrPrefetchOrPreloadOrPrerender();
|
|
}
|
|
|
|
void (HTMLLinkElement::*update)() = &HTMLLinkElement::UpdateStyleSheetInternal;
|
|
nsContentUtils::AddScriptRunner(
|
|
NewRunnableMethod("dom::HTMLLinkElement::BindToTree", this, update));
|
|
|
|
CreateAndDispatchEvent(aDocument, NS_LITERAL_STRING("DOMLinkAdded"));
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::LinkAdded()
|
|
{
|
|
CreateAndDispatchEvent(OwnerDoc(), NS_LITERAL_STRING("DOMLinkAdded"));
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::LinkRemoved()
|
|
{
|
|
CreateAndDispatchEvent(OwnerDoc(), NS_LITERAL_STRING("DOMLinkRemoved"));
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::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_LINK_DNS_PREFETCH_DEFERRED,
|
|
HTML_LINK_DNS_PREFETCH_REQUESTED);
|
|
CancelPrefetchOrPreload();
|
|
|
|
// 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());
|
|
|
|
// If this is reinserted back into the document it will not be
|
|
// from the parser.
|
|
nsCOMPtr<nsIDocument> oldDoc = GetUncomposedDoc();
|
|
|
|
// Check for a ShadowRoot because link elements are inert in a
|
|
// ShadowRoot.
|
|
ShadowRoot* oldShadowRoot = GetBindingParent() ?
|
|
GetBindingParent()->GetShadowRoot() : nullptr;
|
|
|
|
CreateAndDispatchEvent(oldDoc, NS_LITERAL_STRING("DOMLinkRemoved"));
|
|
nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
|
|
|
|
UpdateStyleSheetInternal(oldDoc, oldShadowRoot);
|
|
}
|
|
|
|
bool
|
|
HTMLLinkElement::ParseAttribute(int32_t aNamespaceID,
|
|
nsAtom* aAttribute,
|
|
const nsAString& aValue,
|
|
nsAttrValue& aResult)
|
|
{
|
|
if (aNamespaceID == kNameSpaceID_None) {
|
|
if (aAttribute == nsGkAtoms::crossorigin) {
|
|
ParseCORSValue(aValue, aResult);
|
|
return true;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::as) {
|
|
ParseAsValue(aValue, aResult);
|
|
return true;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::sizes) {
|
|
aResult.ParseAtomArray(aValue);
|
|
return true;
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::integrity) {
|
|
aResult.ParseStringOrAtom(aValue);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
|
|
aResult);
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::CreateAndDispatchEvent(nsIDocument* aDoc,
|
|
const nsAString& aEventName)
|
|
{
|
|
if (!aDoc)
|
|
return;
|
|
|
|
// In the unlikely case that both rev is specified *and* rel=stylesheet,
|
|
// this code will cause the event to fire, on the principle that maybe the
|
|
// page really does want to specify that its author is a stylesheet. Since
|
|
// this should never actually happen and the performance hit is minimal,
|
|
// doing the "right" thing costs virtually nothing here, even if it doesn't
|
|
// make much sense.
|
|
static nsIContent::AttrValuesArray strings[] =
|
|
{&nsGkAtoms::_empty, &nsGkAtoms::stylesheet, nullptr};
|
|
|
|
if (!nsContentUtils::HasNonEmptyAttr(this, kNameSpaceID_None,
|
|
nsGkAtoms::rev) &&
|
|
FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::rel,
|
|
strings, eIgnoreCase) != ATTR_VALUE_NO_MATCH)
|
|
return;
|
|
|
|
RefPtr<AsyncEventDispatcher> asyncDispatcher =
|
|
new AsyncEventDispatcher(this, aEventName, true, true);
|
|
// Always run async in order to avoid running script when the content
|
|
// sink isn't expecting it.
|
|
asyncDispatcher->PostDOMEvent();
|
|
}
|
|
|
|
nsresult
|
|
HTMLLinkElement::BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
|
|
const nsAttrValueOrString* aValue, bool aNotify)
|
|
{
|
|
if (aNameSpaceID == kNameSpaceID_None &&
|
|
(aName == nsGkAtoms::href || aName == nsGkAtoms::rel)) {
|
|
CancelDNSPrefetch(HTML_LINK_DNS_PREFETCH_DEFERRED,
|
|
HTML_LINK_DNS_PREFETCH_REQUESTED);
|
|
CancelPrefetchOrPreload();
|
|
}
|
|
|
|
return nsGenericHTMLElement::BeforeSetAttr(aNameSpaceID, aName,
|
|
aValue, aNotify);
|
|
}
|
|
|
|
nsresult
|
|
HTMLLinkElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
|
|
const nsAttrValue* aValue,
|
|
const nsAttrValue* aOldValue,
|
|
nsIPrincipal* aSubjectPrincipal,
|
|
bool aNotify)
|
|
{
|
|
// It's safe to call ResetLinkState here because our new attr value has
|
|
// already been set or unset. ResetLinkState needs 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 (aName == nsGkAtoms::href && kNameSpaceID_None == aNameSpaceID) {
|
|
bool hasHref = aValue;
|
|
Link::ResetLinkState(!!aNotify, hasHref);
|
|
if (IsInUncomposedDoc()) {
|
|
CreateAndDispatchEvent(OwnerDoc(), NS_LITERAL_STRING("DOMLinkChanged"));
|
|
}
|
|
}
|
|
|
|
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::href) {
|
|
mTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal(
|
|
this, aValue ? aValue->GetStringValue() : EmptyString(),
|
|
aSubjectPrincipal);
|
|
}
|
|
|
|
if (aValue) {
|
|
if (aNameSpaceID == kNameSpaceID_None &&
|
|
(aName == nsGkAtoms::href ||
|
|
aName == nsGkAtoms::rel ||
|
|
aName == nsGkAtoms::title ||
|
|
aName == nsGkAtoms::media ||
|
|
aName == nsGkAtoms::type ||
|
|
aName == nsGkAtoms::as ||
|
|
aName == nsGkAtoms::crossorigin)) {
|
|
bool dropSheet = false;
|
|
if (aName == nsGkAtoms::rel) {
|
|
nsAutoString value;
|
|
aValue->ToString(value);
|
|
uint32_t linkTypes = nsStyleLinkElement::ParseLinkTypes(value);
|
|
if (GetSheet()) {
|
|
dropSheet = !(linkTypes & nsStyleLinkElement::eSTYLESHEET);
|
|
}
|
|
}
|
|
|
|
if ((aName == nsGkAtoms::rel || aName == nsGkAtoms::href) &&
|
|
IsInComposedDoc()) {
|
|
TryDNSPrefetchOrPreconnectOrPrefetchOrPreloadOrPrerender();
|
|
}
|
|
|
|
if ((aName == nsGkAtoms::as || aName == nsGkAtoms::type ||
|
|
aName == nsGkAtoms::crossorigin || aName == nsGkAtoms::media) &&
|
|
IsInComposedDoc()) {
|
|
UpdatePreload(aName, aValue, aOldValue);
|
|
}
|
|
|
|
UpdateStyleSheetInternal(nullptr, nullptr,
|
|
dropSheet ||
|
|
(aName == nsGkAtoms::title ||
|
|
aName == nsGkAtoms::media ||
|
|
aName == nsGkAtoms::type));
|
|
}
|
|
} else {
|
|
// Since removing href or rel makes us no longer link to a
|
|
// stylesheet, force updates for those too.
|
|
if (aNameSpaceID == kNameSpaceID_None) {
|
|
if (aName == nsGkAtoms::href ||
|
|
aName == nsGkAtoms::rel ||
|
|
aName == nsGkAtoms::title ||
|
|
aName == nsGkAtoms::media ||
|
|
aName == nsGkAtoms::type) {
|
|
UpdateStyleSheetInternal(nullptr, nullptr, true);
|
|
}
|
|
if ((aName == nsGkAtoms::as || aName == nsGkAtoms::type ||
|
|
aName == nsGkAtoms::crossorigin || aName == nsGkAtoms::media) &&
|
|
IsInComposedDoc()) {
|
|
UpdatePreload(aName, aValue, aOldValue);
|
|
}
|
|
}
|
|
}
|
|
|
|
return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName, aValue,
|
|
aOldValue, aSubjectPrincipal, aNotify);
|
|
}
|
|
|
|
nsresult
|
|
HTMLLinkElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
|
|
{
|
|
return GetEventTargetParentForAnchors(aVisitor);
|
|
}
|
|
|
|
nsresult
|
|
HTMLLinkElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
|
|
{
|
|
return PostHandleEventForAnchors(aVisitor);
|
|
}
|
|
|
|
bool
|
|
HTMLLinkElement::IsLink(nsIURI** aURI) const
|
|
{
|
|
return IsHTMLLink(aURI);
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::GetLinkTarget(nsAString& aTarget)
|
|
{
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::target, aTarget);
|
|
if (aTarget.IsEmpty()) {
|
|
GetBaseTarget(aTarget);
|
|
}
|
|
}
|
|
|
|
static const DOMTokenListSupportedToken sSupportedRelValues[] = {
|
|
// Keep this in sync with ToLinkMask in nsStyleLinkElement.cpp.
|
|
// "import" must come first because it's conditional.
|
|
"prefetch",
|
|
"dns-prefetch",
|
|
"stylesheet",
|
|
"next",
|
|
"alternate",
|
|
"preconnect",
|
|
"icon",
|
|
"search",
|
|
"preload",
|
|
nullptr
|
|
};
|
|
|
|
static const DOMTokenListSupportedToken sSupportedRelValuesNoPreload[] = {
|
|
// Keep this in sync with ToLinkMask in nsStyleLinkElement.cpp.
|
|
// "import" must come first because it's conditional.
|
|
"prefetch",
|
|
"dns-prefetch",
|
|
"stylesheet",
|
|
"next",
|
|
"alternate",
|
|
"preconnect",
|
|
"icon",
|
|
"search",
|
|
nullptr
|
|
};
|
|
nsDOMTokenList*
|
|
HTMLLinkElement::RelList()
|
|
{
|
|
if (!mRelList) {
|
|
if (Preferences::GetBool("network.preload")) {
|
|
mRelList = new nsDOMTokenList(this, nsGkAtoms::rel, sSupportedRelValues);
|
|
} else {
|
|
mRelList = new nsDOMTokenList(this, nsGkAtoms::rel, sSupportedRelValuesNoPreload);
|
|
}
|
|
}
|
|
return mRelList;
|
|
}
|
|
|
|
already_AddRefed<nsIURI>
|
|
HTMLLinkElement::GetHrefURI() const
|
|
{
|
|
return GetHrefURIForAnchors();
|
|
}
|
|
|
|
already_AddRefed<nsIURI>
|
|
HTMLLinkElement::GetStyleSheetURL(bool* aIsInline, nsIPrincipal** aTriggeringPrincipal)
|
|
{
|
|
*aIsInline = false;
|
|
*aTriggeringPrincipal = nullptr;
|
|
|
|
nsAutoString href;
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::href, href);
|
|
if (href.IsEmpty()) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIPrincipal> prin = mTriggeringPrincipal;
|
|
prin.forget(aTriggeringPrincipal);
|
|
|
|
nsCOMPtr<nsIURI> uri = Link::GetURI();
|
|
return uri.forget();
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::GetStyleSheetInfo(nsAString& aTitle,
|
|
nsAString& aType,
|
|
nsAString& aMedia,
|
|
bool* aIsScoped,
|
|
bool* aIsAlternate)
|
|
{
|
|
aTitle.Truncate();
|
|
aType.Truncate();
|
|
aMedia.Truncate();
|
|
*aIsScoped = false;
|
|
*aIsAlternate = false;
|
|
|
|
nsAutoString rel;
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::rel, rel);
|
|
uint32_t linkTypes = nsStyleLinkElement::ParseLinkTypes(rel);
|
|
// Is it a stylesheet link?
|
|
if (!(linkTypes & nsStyleLinkElement::eSTYLESHEET)) {
|
|
return;
|
|
}
|
|
|
|
nsAutoString title;
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::title, title);
|
|
title.CompressWhitespace();
|
|
aTitle.Assign(title);
|
|
|
|
// If alternate, does it have title?
|
|
if (linkTypes & nsStyleLinkElement::eALTERNATE) {
|
|
if (aTitle.IsEmpty()) { // alternates must have title
|
|
return;
|
|
} else {
|
|
*aIsAlternate = true;
|
|
}
|
|
}
|
|
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::media, aMedia);
|
|
// The HTML5 spec is formulated in terms of the CSSOM spec, which specifies
|
|
// that media queries should be ASCII lowercased during serialization.
|
|
nsContentUtils::ASCIIToLower(aMedia);
|
|
|
|
nsAutoString mimeType;
|
|
nsAutoString notUsed;
|
|
GetAttr(kNameSpaceID_None, nsGkAtoms::type, aType);
|
|
nsContentUtils::SplitMimeType(aType, mimeType, notUsed);
|
|
if (!mimeType.IsEmpty() && !mimeType.LowerCaseEqualsLiteral("text/css")) {
|
|
return;
|
|
}
|
|
|
|
// If we get here we assume that we're loading a css file, so set the
|
|
// type to 'text/css'
|
|
aType.AssignLiteral("text/css");
|
|
}
|
|
|
|
CORSMode
|
|
HTMLLinkElement::GetCORSMode() const
|
|
{
|
|
return AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin));
|
|
}
|
|
|
|
EventStates
|
|
HTMLLinkElement::IntrinsicState() const
|
|
{
|
|
return Link::LinkState() | nsGenericHTMLElement::IntrinsicState();
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
|
|
size_t* aNodeSize) const
|
|
{
|
|
nsGenericHTMLElement::AddSizeOfExcludingThis(aSizes, aNodeSize);
|
|
*aNodeSize += Link::SizeOfExcludingThis(aSizes.mState);
|
|
}
|
|
|
|
JSObject*
|
|
HTMLLinkElement::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
|
|
{
|
|
return HTMLLinkElementBinding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
void
|
|
HTMLLinkElement::GetAs(nsAString& aResult)
|
|
{
|
|
GetEnumAttr(nsGkAtoms::as, EmptyCString().get(), aResult);
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|