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-rw-r--r--dom/base/nsNameSpaceManager.cpp261
1 files changed, 261 insertions, 0 deletions
diff --git a/dom/base/nsNameSpaceManager.cpp b/dom/base/nsNameSpaceManager.cpp
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+++ b/dom/base/nsNameSpaceManager.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/. */
+
+/*
+ * 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 const char* kPrefSVGDisabled = "svg.disabled";
+static const char* kPrefMathMLDisabled = "mathml.disabled";
+static 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) {
+ aNameSpaceID = kNameSpaceID_None; // xmlns="", see bug 75700 for details
+ 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()) {
+ return kNameSpaceID_None; // xmlns="", see bug 75700 for details
+ }
+
+ RefPtr<nsAtom> atom = NS_Atomize(aURI);
+ return GetNameSpaceID(atom, aInChromeDoc);
+}
+
+int32_t nsNameSpaceManager::GetNameSpaceID(nsAtom* aURI, bool aInChromeDoc) {
+ if (aURI == nsGkAtoms::_empty) {
+ return kNameSpaceID_None; // xmlns="", see bug 75700 for details
+ }
+
+ 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<mozilla::dom::NodeInfo> ni = aNodeInfo;
+ int32_t ns = ni->NamespaceID();
+ RefPtr<nsAtom> isAtom = aIs ? NS_AtomizeMainThread(*aIs) : nullptr;
+ if (ns == kNameSpaceID_XHTML) {
+ return NS_NewHTMLElement(aResult, ni.forget(), aFromParser, isAtom);
+ }
+ if (ns == kNameSpaceID_XUL) {
+ return NS_NewXULElement(aResult, ni.forget(), aFromParser, isAtom);
+ }
+ 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);
+}