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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsAutoPtr.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsCOMArray.h"
#include "nsContentCreatorFunctions.h"
#include "nsString.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/dom/XBLChildrenElement.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
using namespace mozilla::dom;
#define kXMLNSNameSpaceURI "http://www.w3.org/2000/xmlns/"
#define kXMLNameSpaceURI "http://www.w3.org/XML/1998/namespace"
#define kXHTMLNameSpaceURI "http://www.w3.org/1999/xhtml"
#define kXLinkNameSpaceURI "http://www.w3.org/1999/xlink"
#define kXSLTNameSpaceURI "http://www.w3.org/1999/XSL/Transform"
#define kXBLNameSpaceURI "http://www.mozilla.org/xbl"
#define kMathMLNameSpaceURI "http://www.w3.org/1998/Math/MathML"
#define kRDFNameSpaceURI "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
#define kXULNameSpaceURI "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
#define kSVGNameSpaceURI "http://www.w3.org/2000/svg"
StaticAutoPtr<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(NS_LITERAL_STRING(uri), id); \
NS_ENSURE_SUCCESS(rv, false)
// Need to be ordered according to ID.
REGISTER_NAMESPACE(kXMLNSNameSpaceURI, kNameSpaceID_XMLNS);
REGISTER_NAMESPACE(kXMLNameSpaceURI, kNameSpaceID_XML);
REGISTER_NAMESPACE(kXHTMLNameSpaceURI, kNameSpaceID_XHTML);
REGISTER_NAMESPACE(kXLinkNameSpaceURI, kNameSpaceID_XLink);
REGISTER_NAMESPACE(kXSLTNameSpaceURI, kNameSpaceID_XSLT);
REGISTER_NAMESPACE(kXBLNameSpaceURI, kNameSpaceID_XBL);
REGISTER_NAMESPACE(kMathMLNameSpaceURI, kNameSpaceID_MathML);
REGISTER_NAMESPACE(kRDFNameSpaceURI, kNameSpaceID_RDF);
REGISTER_NAMESPACE(kXULNameSpaceURI, kNameSpaceID_XUL);
REGISTER_NAMESPACE(kSVGNameSpaceURI, kNameSpaceID_SVG);
#undef REGISTER_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;
}
nsresult rv = NS_OK;
if (!mURIToIDTable.Get(&aURI, &aNameSpaceID)) {
aNameSpaceID = mURIArray.Length() + 1; // id is index + 1
rv = AddNameSpace(aURI, 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");
int32_t index = aNameSpaceID - 1; // id is index + 1
if (index < 0 || index >= int32_t(mURIArray.Length())) {
aURI.Truncate();
return NS_ERROR_ILLEGAL_VALUE;
}
aURI = *mURIArray.ElementAt(index);
return NS_OK;
}
int32_t
nsNameSpaceManager::GetNameSpaceID(const nsAString& aURI)
{
if (aURI.IsEmpty()) {
return kNameSpaceID_None; // xmlns="", see bug 75700 for details
}
int32_t 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)
{
nsRefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo;
int32_t ns = ni->NamespaceID();
if (ns == kNameSpaceID_XHTML) {
return NS_NewHTMLElement(aResult, ni.forget(), aFromParser);
}
#ifdef MOZ_XUL
if (ns == kNameSpaceID_XUL) {
return NS_NewXULElement(aResult, ni.forget());
}
#endif
if (ns == kNameSpaceID_MathML) {
return NS_NewMathMLElement(aResult, ni.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(const nsAString& aURI,
const int32_t aNameSpaceID)
{
if (aNameSpaceID < 0) {
// We've wrapped... Can't do anything else here; just bail.
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ASSERTION(aNameSpaceID - 1 == (int32_t) mURIArray.Length(),
"BAD! AddNameSpace not called in right order!");
nsString* uri = new nsString(aURI);
if (!uri || !mURIArray.AppendElement(uri)) {
delete uri;
return NS_ERROR_OUT_OF_MEMORY;
}
mURIToIDTable.Put(uri, aNameSpaceID);
return NS_OK;
}
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