зеркало из https://github.com/mozilla/gecko-dev.git
179 строки
6.2 KiB
C++
179 строки
6.2 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/AsyncEventDispatcher.h"
|
|
#include "mozilla/dom/BindContext.h"
|
|
#include "mozilla/dom/HTMLMetaElement.h"
|
|
#include "mozilla/dom/HTMLMetaElementBinding.h"
|
|
#include "mozilla/dom/nsCSPService.h"
|
|
#include "mozilla/dom/nsCSPUtils.h"
|
|
#include "mozilla/dom/ViewportMetaData.h"
|
|
#include "mozilla/Logging.h"
|
|
#include "mozilla/StaticPrefs_security.h"
|
|
#include "nsContentUtils.h"
|
|
#include "nsSandboxFlags.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsIXMLContentSink.h"
|
|
|
|
static mozilla::LazyLogModule gMetaElementLog("nsMetaElement");
|
|
#define LOG(msg) MOZ_LOG(gMetaElementLog, mozilla::LogLevel::Debug, msg)
|
|
#define LOG_ENABLED() MOZ_LOG_TEST(gMetaElementLog, mozilla::LogLevel::Debug)
|
|
|
|
NS_IMPL_NS_NEW_HTML_ELEMENT(Meta)
|
|
|
|
namespace mozilla::dom {
|
|
|
|
HTMLMetaElement::HTMLMetaElement(
|
|
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
|
|
: nsGenericHTMLElement(std::move(aNodeInfo)) {}
|
|
|
|
HTMLMetaElement::~HTMLMetaElement() = default;
|
|
|
|
NS_IMPL_ELEMENT_CLONE(HTMLMetaElement)
|
|
|
|
void HTMLMetaElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
|
|
const nsAttrValue* aValue,
|
|
const nsAttrValue* aOldValue,
|
|
nsIPrincipal* aSubjectPrincipal,
|
|
bool aNotify) {
|
|
if (aNameSpaceID == kNameSpaceID_None) {
|
|
if (Document* document = GetUncomposedDoc()) {
|
|
if (aName == nsGkAtoms::content) {
|
|
if (const nsAttrValue* name = GetParsedAttr(nsGkAtoms::name)) {
|
|
MetaAddedOrChanged(*document, *name, ChangeKind::ContentChange);
|
|
}
|
|
CreateAndDispatchEvent(*document, u"DOMMetaChanged"_ns);
|
|
} else if (aName == nsGkAtoms::name) {
|
|
if (aOldValue) {
|
|
MetaRemoved(*document, *aOldValue, ChangeKind::NameChange);
|
|
}
|
|
if (aValue) {
|
|
MetaAddedOrChanged(*document, *aValue, ChangeKind::NameChange);
|
|
}
|
|
CreateAndDispatchEvent(*document, u"DOMMetaChanged"_ns);
|
|
}
|
|
}
|
|
}
|
|
|
|
return nsGenericHTMLElement::AfterSetAttr(
|
|
aNameSpaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify);
|
|
}
|
|
|
|
nsresult HTMLMetaElement::BindToTree(BindContext& aContext, nsINode& aParent) {
|
|
nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (!IsInUncomposedDoc()) {
|
|
return rv;
|
|
}
|
|
Document& doc = aContext.OwnerDoc();
|
|
|
|
bool shouldProcessMeta = true;
|
|
// We don't want to call ProcessMETATag when we are pretty print
|
|
// the document
|
|
if (doc.IsXMLDocument()) {
|
|
if (nsCOMPtr<nsIXMLContentSink> xmlSink =
|
|
do_QueryInterface(doc.GetCurrentContentSink())) {
|
|
if (xmlSink->IsPrettyPrintXML() &&
|
|
xmlSink->IsPrettyPrintHasSpecialRoot()) {
|
|
shouldProcessMeta = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (shouldProcessMeta) {
|
|
doc.ProcessMETATag(this);
|
|
}
|
|
|
|
if (AttrValueIs(kNameSpaceID_None, nsGkAtoms::httpEquiv, nsGkAtoms::headerCSP,
|
|
eIgnoreCase)) {
|
|
// only accept <meta http-equiv="Content-Security-Policy" content=""> if it
|
|
// appears in the <head> element.
|
|
Element* headElt = doc.GetHeadElement();
|
|
if (headElt && IsInclusiveDescendantOf(headElt)) {
|
|
nsAutoString content;
|
|
GetContent(content);
|
|
|
|
if (LOG_ENABLED()) {
|
|
nsAutoCString documentURIspec;
|
|
if (nsIURI* documentURI = doc.GetDocumentURI()) {
|
|
documentURI->GetAsciiSpec(documentURIspec);
|
|
}
|
|
|
|
LOG(
|
|
("HTMLMetaElement %p sets CSP '%s' on document=%p, "
|
|
"document-uri=%s",
|
|
this, NS_ConvertUTF16toUTF8(content).get(), &doc,
|
|
documentURIspec.get()));
|
|
}
|
|
CSP_ApplyMetaCSPToDoc(doc, content);
|
|
}
|
|
}
|
|
|
|
if (const nsAttrValue* name = GetParsedAttr(nsGkAtoms::name)) {
|
|
MetaAddedOrChanged(doc, *name, ChangeKind::TreeChange);
|
|
}
|
|
CreateAndDispatchEvent(doc, u"DOMMetaAdded"_ns);
|
|
return rv;
|
|
}
|
|
|
|
void HTMLMetaElement::UnbindFromTree(UnbindContext& aContext) {
|
|
if (Document* oldDoc = GetUncomposedDoc()) {
|
|
if (const nsAttrValue* name = GetParsedAttr(nsGkAtoms::name)) {
|
|
MetaRemoved(*oldDoc, *name, ChangeKind::TreeChange);
|
|
}
|
|
CreateAndDispatchEvent(*oldDoc, u"DOMMetaRemoved"_ns);
|
|
}
|
|
nsGenericHTMLElement::UnbindFromTree(aContext);
|
|
}
|
|
|
|
void HTMLMetaElement::CreateAndDispatchEvent(Document&,
|
|
const nsAString& aEventName) {
|
|
AsyncEventDispatcher::RunDOMEventWhenSafe(*this, aEventName, CanBubble::eYes,
|
|
ChromeOnlyDispatch::eYes);
|
|
}
|
|
|
|
JSObject* HTMLMetaElement::WrapNode(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) {
|
|
return HTMLMetaElement_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
void HTMLMetaElement::MetaAddedOrChanged(Document& aDoc,
|
|
const nsAttrValue& aName,
|
|
ChangeKind aChangeKind) {
|
|
nsAutoString content;
|
|
const bool hasContent = GetAttr(nsGkAtoms::content, content);
|
|
if (aName.Equals(nsGkAtoms::viewport, eIgnoreCase)) {
|
|
if (hasContent) {
|
|
aDoc.SetMetaViewportData(MakeUnique<ViewportMetaData>(content));
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (aName.Equals(nsGkAtoms::referrer, eIgnoreCase)) {
|
|
content = nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(
|
|
content);
|
|
return aDoc.UpdateReferrerInfoFromMeta(content,
|
|
/* aPreload = */ false);
|
|
}
|
|
if (aName.Equals(nsGkAtoms::color_scheme, eIgnoreCase)) {
|
|
if (aChangeKind != ChangeKind::ContentChange) {
|
|
return aDoc.AddColorSchemeMeta(*this);
|
|
}
|
|
return aDoc.RecomputeColorScheme();
|
|
}
|
|
}
|
|
|
|
void HTMLMetaElement::MetaRemoved(Document& aDoc, const nsAttrValue& aName,
|
|
ChangeKind aChangeKind) {
|
|
MOZ_ASSERT(aChangeKind != ChangeKind::ContentChange,
|
|
"Content change can't trigger removal");
|
|
if (aName.Equals(nsGkAtoms::color_scheme, eIgnoreCase)) {
|
|
return aDoc.RemoveColorSchemeMeta(*this);
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla::dom
|