Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
/*
* A class for managing namespace IDs and mapping back and forth
* between namespace IDs and namespace URIs.
*/
#include "nsNameSpaceManager.h"
#include "nscore.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsAtom.h"
#include "nsCOMArray.h"
#include "nsContentCreatorFunctions.h"
#include "nsGkAtoms.h"
#include "mozilla/dom/Document.h"
#include "nsString.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/dom/Element.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace mozilla::dom;
static constexpr const char* kPrefSVGDisabled = "svg.disabled";
static constexpr const char* kPrefMathMLDisabled = "mathml.disabled";
static constexpr const char* kObservedNSPrefs[] = {kPrefMathMLDisabled,
kPrefSVGDisabled, nullptr};
StaticRefPtr<nsNameSpaceManager> nsNameSpaceManager::sInstance;
/* static */
nsNameSpaceManager* nsNameSpaceManager::GetInstance() {
if (!sInstance) {
sInstance = new nsNameSpaceManager();
if (sInstance->Init()) {
ClearOnShutdown(&sInstance);
} else {
delete sInstance;
sInstance = nullptr;
}
}
return sInstance;
}
bool nsNameSpaceManager::Init() {
nsresult rv;
#define REGISTER_NAMESPACE(uri, id) \
rv = AddNameSpace(dont_AddRef(uri), id); \
NS_ENSURE_SUCCESS(rv, false)
#define REGISTER_DISABLED_NAMESPACE(uri, id) \
rv = AddDisabledNameSpace(dont_AddRef(uri), id); \
NS_ENSURE_SUCCESS(rv, false)
mozilla::Preferences::RegisterCallbacks(nsNameSpaceManager::PrefChanged,
kObservedNSPrefs, this);
PrefChanged(nullptr);
// Need to be ordered according to ID.
MOZ_ASSERT(mURIArray.IsEmpty());
REGISTER_NAMESPACE(nsGkAtoms::_empty, kNameSpaceID_None);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_xmlns, kNameSpaceID_XMLNS);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_xml, kNameSpaceID_XML);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_xhtml, kNameSpaceID_XHTML);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_xlink, kNameSpaceID_XLink);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_xslt, kNameSpaceID_XSLT);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_mathml, kNameSpaceID_MathML);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_rdf, kNameSpaceID_RDF);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_xul, kNameSpaceID_XUL);
REGISTER_NAMESPACE(nsGkAtoms::nsuri_svg, kNameSpaceID_SVG);
REGISTER_DISABLED_NAMESPACE(nsGkAtoms::nsuri_mathml,
kNameSpaceID_disabled_MathML);
REGISTER_DISABLED_NAMESPACE(nsGkAtoms::nsuri_svg, kNameSpaceID_disabled_SVG);
#undef REGISTER_NAMESPACE
#undef REGISTER_DISABLED_NAMESPACE
return true;
}
nsresult nsNameSpaceManager::RegisterNameSpace(const nsAString& aURI,
int32_t& aNameSpaceID) {
RefPtr<nsAtom> atom = NS_Atomize(aURI);
return RegisterNameSpace(atom.forget(), aNameSpaceID);
}
nsresult nsNameSpaceManager::RegisterNameSpace(already_AddRefed<nsAtom> aURI,
int32_t& aNameSpaceID) {
RefPtr<nsAtom> atom = aURI;
nsresult rv = NS_OK;
if (atom == nsGkAtoms::_empty) {
return NS_OK;
}
if (!mURIToIDTable.Get(atom, &aNameSpaceID)) {
aNameSpaceID = mURIArray.Length();
rv = AddNameSpace(atom.forget(), aNameSpaceID);
if (NS_FAILED(rv)) {
aNameSpaceID = kNameSpaceID_Unknown;
}
}
MOZ_ASSERT(aNameSpaceID >= -1, "Bogus namespace ID");
return rv;
}
nsresult nsNameSpaceManager::GetNameSpaceURI(int32_t aNameSpaceID,
nsAString& aURI) {
MOZ_ASSERT(aNameSpaceID >= 0, "Bogus namespace ID");
// We have historically treated GetNameSpaceURI calls for kNameSpaceID_None
// as erroneous.
if (aNameSpaceID <= 0 || aNameSpaceID >= int32_t(mURIArray.Length())) {
aURI.Truncate();
return NS_ERROR_ILLEGAL_VALUE;
}
mURIArray.ElementAt(aNameSpaceID)->ToString(aURI);
return NS_OK;
}
int32_t nsNameSpaceManager::GetNameSpaceID(const nsAString& aURI,
bool aInChromeDoc) {
if (aURI.IsEmpty()) {
}
RefPtr<nsAtom> atom = NS_Atomize(aURI);
return GetNameSpaceID(atom, aInChromeDoc);
}
int32_t nsNameSpaceManager::GetNameSpaceID(nsAtom* aURI, bool aInChromeDoc) {
if (aURI == nsGkAtoms::_empty) {
}
int32_t nameSpaceID;
if (!aInChromeDoc && (mMathMLDisabled || mSVGDisabled) &&
mDisabledURIToIDTable.Get(aURI, &nameSpaceID) &&
((mMathMLDisabled && kNameSpaceID_disabled_MathML == nameSpaceID) ||
(mSVGDisabled && kNameSpaceID_disabled_SVG == nameSpaceID))) {
MOZ_ASSERT(nameSpaceID >= 0, "Bogus namespace ID");
return nameSpaceID;
}
if (mURIToIDTable.Get(aURI, &nameSpaceID)) {
MOZ_ASSERT(nameSpaceID >= 0, "Bogus namespace ID");
return nameSpaceID;
}
return kNameSpaceID_Unknown;
}
// static
const char* nsNameSpaceManager::GetNameSpaceDisplayName(uint32_t aNameSpaceID) {
static const char* kNSURIs[] = {"([none])", "(xmlns)", "(xml)", "(xhtml)",
"(XLink)", "(XSLT)", "(MathML)", "(RDF)",
"(XUL)", "(SVG)"};
if (aNameSpaceID < ArrayLength(kNSURIs)) {
return kNSURIs[aNameSpaceID];
}
return "";
}
nsresult NS_NewElement(Element** aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
FromParser aFromParser, const nsAString* aIs) {
RefPtr<nsAtom> isAtom = aIs ? NS_AtomizeMainThread(*aIs) : nullptr;
return NS_NewElement(aResult, std::move(aNodeInfo), aFromParser, isAtom);
}
nsresult NS_NewElement(Element** aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
FromParser aFromParser, nsAtom* aIsAtom,
CustomElementDefinition* aDefinition) {
RefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo;
int32_t ns = ni->NamespaceID();
if (ns == kNameSpaceID_XHTML) {
return NS_NewHTMLElement(aResult, ni.forget(), aFromParser, aIsAtom,
aDefinition);
}
if (ns == kNameSpaceID_XUL) {
return NS_NewXULElement(aResult, ni.forget(), aFromParser, aIsAtom,
aDefinition);
}
if (ns == kNameSpaceID_MathML) {
// If the mathml.disabled pref. is true, convert all MathML nodes into
// disabled MathML nodes by swapping the namespace.
if (ni->NodeInfoManager()->MathMLEnabled()) {
return NS_NewMathMLElement(aResult, ni.forget());
}
RefPtr<mozilla::dom::NodeInfo> genericXMLNI =
ni->NodeInfoManager()->GetNodeInfo(ni->NameAtom(), ni->GetPrefixAtom(),
kNameSpaceID_disabled_MathML,
ni->NodeType(), ni->GetExtraName());
return NS_NewXMLElement(aResult, genericXMLNI.forget());
}
if (ns == kNameSpaceID_SVG) {
// If the svg.disabled pref. is true, convert all SVG nodes into
// disabled SVG nodes by swapping the namespace.
if (ni->NodeInfoManager()->SVGEnabled()) {
return NS_NewSVGElement(aResult, ni.forget(), aFromParser);
}
RefPtr<mozilla::dom::NodeInfo> genericXMLNI =
ni->NodeInfoManager()->GetNodeInfo(ni->NameAtom(), ni->GetPrefixAtom(),
kNameSpaceID_disabled_SVG,
ni->NodeType(), ni->GetExtraName());
return NS_NewXMLElement(aResult, genericXMLNI.forget());
}
return NS_NewXMLElement(aResult, ni.forget());
}
bool nsNameSpaceManager::HasElementCreator(int32_t aNameSpaceID) {
return aNameSpaceID == kNameSpaceID_XHTML ||
aNameSpaceID == kNameSpaceID_XUL ||
aNameSpaceID == kNameSpaceID_MathML ||
aNameSpaceID == kNameSpaceID_SVG || false;
}
nsresult nsNameSpaceManager::AddNameSpace(already_AddRefed<nsAtom> aURI,
const int32_t aNameSpaceID) {
RefPtr<nsAtom> uri = aURI;
if (aNameSpaceID < 0) {
// We've wrapped... Can't do anything else here; just bail.
return NS_ERROR_OUT_OF_MEMORY;
}
MOZ_ASSERT(aNameSpaceID == (int32_t)mURIArray.Length());
mURIArray.AppendElement(uri.forget());
mURIToIDTable.InsertOrUpdate(mURIArray.LastElement(), aNameSpaceID);
return NS_OK;
}
nsresult nsNameSpaceManager::AddDisabledNameSpace(already_AddRefed<nsAtom> aURI,
const int32_t aNameSpaceID) {
RefPtr<nsAtom> uri = aURI;
if (aNameSpaceID < 0) {
// We've wrapped... Can't do anything else here; just bail.
return NS_ERROR_OUT_OF_MEMORY;
}
MOZ_ASSERT(aNameSpaceID == (int32_t)mURIArray.Length());
mURIArray.AppendElement(uri.forget());
mDisabledURIToIDTable.InsertOrUpdate(mURIArray.LastElement(), aNameSpaceID);
return NS_OK;
}
// static
void nsNameSpaceManager::PrefChanged(const char* aPref, void* aSelf) {
static_cast<nsNameSpaceManager*>(aSelf)->PrefChanged(aPref);
}
void nsNameSpaceManager::PrefChanged(const char* aPref) {
mMathMLDisabled = mozilla::Preferences::GetBool(kPrefMathMLDisabled);
mSVGDisabled = mozilla::Preferences::GetBool(kPrefSVGDisabled);
}