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-rw-r--r--dom/base/nsNameSpaceManager.cpp266
1 files changed, 266 insertions, 0 deletions
diff --git a/dom/base/nsNameSpaceManager.cpp b/dom/base/nsNameSpaceManager.cpp
new file mode 100644
index 000000000..0130bb5d2
--- /dev/null
+++ b/dom/base/nsNameSpaceManager.cpp
@@ -0,0 +1,266 @@
+/* -*- 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 "nsCOMArray.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsContentUtils.h"
+#include "nsGkAtoms.h"
+#include "nsIDocument.h"
+#include "nsString.h"
+#include "mozilla/dom/NodeInfo.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/dom/XBLChildrenElement.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static const char* kPrefMathMLDisabled = "mathml.disabled";
+static const char* kObservedPrefs[] = {
+ kPrefMathMLDisabled,
+ 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::AddStrongObservers(this, kObservedPrefs);
+ mMathMLDisabled = mozilla::Preferences::GetBool(kPrefMathMLDisabled);
+
+
+ // 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_xbl, kNameSpaceID_XBL);
+ 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);
+
+#undef REGISTER_NAMESPACE
+#undef REGISTER_DISABLED_NAMESPACE
+
+ return true;
+}
+
+nsresult
+nsNameSpaceManager::RegisterNameSpace(const nsAString& aURI,
+ int32_t& aNameSpaceID)
+{
+ if (aURI.IsEmpty()) {
+ aNameSpaceID = kNameSpaceID_None; // xmlns="", see bug 75700 for details
+
+ return NS_OK;
+ }
+
+ nsCOMPtr<nsIAtom> atom = NS_Atomize(aURI);
+ nsresult rv = NS_OK;
+ if (!mURIToIDTable.Get(atom, &aNameSpaceID)) {
+ aNameSpaceID = mURIArray.Length();
+
+ rv = AddNameSpace(atom.forget(), aNameSpaceID);
+ if (NS_FAILED(rv)) {
+ aNameSpaceID = kNameSpaceID_Unknown;
+ }
+ }
+
+ NS_POSTCONDITION(aNameSpaceID >= -1, "Bogus namespace ID");
+
+ return rv;
+}
+
+nsresult
+nsNameSpaceManager::GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI)
+{
+ NS_PRECONDITION(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
+ }
+
+ nsCOMPtr<nsIAtom> atom = NS_Atomize(aURI);
+ return GetNameSpaceID(atom, aInChromeDoc);
+}
+
+int32_t
+nsNameSpaceManager::GetNameSpaceID(nsIAtom* aURI,
+ bool aInChromeDoc)
+{
+ if (aURI == nsGkAtoms::_empty) {
+ return kNameSpaceID_None; // xmlns="", see bug 75700 for details
+ }
+
+ int32_t nameSpaceID;
+ if (mMathMLDisabled &&
+ mDisabledURIToIDTable.Get(aURI, &nameSpaceID) &&
+ !aInChromeDoc) {
+ NS_POSTCONDITION(nameSpaceID >= 0, "Bogus namespace ID");
+ return nameSpaceID;
+ }
+ if (mURIToIDTable.Get(aURI, &nameSpaceID)) {
+ NS_POSTCONDITION(nameSpaceID >= 0, "Bogus namespace ID");
+ return nameSpaceID;
+ }
+
+ return kNameSpaceID_Unknown;
+}
+
+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();
+ if (ns == kNameSpaceID_XHTML) {
+ return NS_NewHTMLElement(aResult, ni.forget(), aFromParser, aIs);
+ }
+#ifdef MOZ_XUL
+ if (ns == kNameSpaceID_XUL) {
+ return NS_NewXULElement(aResult, ni.forget());
+ }
+#endif
+ if (ns == kNameSpaceID_MathML) {
+ // If the mathml.disabled pref. is true, convert all MathML nodes into
+ // disabled MathML nodes by swapping the namespace.
+ nsNameSpaceManager* nsmgr = nsNameSpaceManager::GetInstance();
+ if ((nsmgr && !nsmgr->mMathMLDisabled) ||
+ nsContentUtils::IsChromeDoc(ni->GetDocument())) {
+ 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) {
+ return NS_NewSVGElement(aResult, ni.forget(), aFromParser);
+ }
+ if (ns == kNameSpaceID_XBL && ni->Equals(nsGkAtoms::children)) {
+ NS_ADDREF(*aResult = new XBLChildrenElement(ni.forget()));
+ return NS_OK;
+ }
+
+ return NS_NewXMLElement(aResult, ni.forget());
+}
+
+bool
+nsNameSpaceManager::HasElementCreator(int32_t aNameSpaceID)
+{
+ return aNameSpaceID == kNameSpaceID_XHTML ||
+#ifdef MOZ_XUL
+ aNameSpaceID == kNameSpaceID_XUL ||
+#endif
+ aNameSpaceID == kNameSpaceID_MathML ||
+ aNameSpaceID == kNameSpaceID_SVG ||
+ false;
+}
+
+nsresult nsNameSpaceManager::AddNameSpace(already_AddRefed<nsIAtom> aURI,
+ const int32_t aNameSpaceID)
+{
+ nsCOMPtr<nsIAtom> 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.Put(mURIArray.LastElement(), aNameSpaceID);
+
+ return NS_OK;
+}
+
+nsresult
+nsNameSpaceManager::AddDisabledNameSpace(already_AddRefed<nsIAtom> aURI,
+ const int32_t aNameSpaceID)
+{
+ nsCOMPtr<nsIAtom> 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.Put(mURIArray.LastElement(), aNameSpaceID);
+
+ return NS_OK;
+}
+
+// nsISupports
+NS_IMPL_ISUPPORTS(nsNameSpaceManager,
+ nsIObserver)
+
+// nsIObserver
+NS_IMETHODIMP
+nsNameSpaceManager::Observe(nsISupports* aObject, const char* aTopic,
+ const char16_t* aMessage)
+{
+ mMathMLDisabled = mozilla::Preferences::GetBool(kPrefMathMLDisabled);
+ return NS_OK;
+}