1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/base/src/nsNameSpaceManager.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,199 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * A class for managing namespace IDs and mapping back and forth
1.11 + * between namespace IDs and namespace URIs.
1.12 + */
1.13 +
1.14 +#include "nsNameSpaceManager.h"
1.15 +
1.16 +#include "nscore.h"
1.17 +#include "nsAutoPtr.h"
1.18 +#include "nsINodeInfo.h"
1.19 +#include "nsCOMArray.h"
1.20 +#include "nsContentCreatorFunctions.h"
1.21 +#include "nsString.h"
1.22 +#include "nsINodeInfo.h"
1.23 +#include "mozilla/ClearOnShutdown.h"
1.24 +#include "mozilla/dom/XBLChildrenElement.h"
1.25 +#include "mozilla/dom/Element.h"
1.26 +
1.27 +using namespace mozilla;
1.28 +using namespace mozilla::dom;
1.29 +
1.30 +#define kXMLNSNameSpaceURI "http://www.w3.org/2000/xmlns/"
1.31 +#define kXMLNameSpaceURI "http://www.w3.org/XML/1998/namespace"
1.32 +#define kXHTMLNameSpaceURI "http://www.w3.org/1999/xhtml"
1.33 +#define kXLinkNameSpaceURI "http://www.w3.org/1999/xlink"
1.34 +#define kXSLTNameSpaceURI "http://www.w3.org/1999/XSL/Transform"
1.35 +#define kXBLNameSpaceURI "http://www.mozilla.org/xbl"
1.36 +#define kMathMLNameSpaceURI "http://www.w3.org/1998/Math/MathML"
1.37 +#define kRDFNameSpaceURI "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
1.38 +#define kXULNameSpaceURI "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
1.39 +#define kSVGNameSpaceURI "http://www.w3.org/2000/svg"
1.40 +
1.41 +StaticAutoPtr<nsNameSpaceManager> nsNameSpaceManager::sInstance;
1.42 +
1.43 +/* static */ nsNameSpaceManager*
1.44 +nsNameSpaceManager::GetInstance() {
1.45 + if (!sInstance) {
1.46 + sInstance = new nsNameSpaceManager();
1.47 + if (sInstance->Init()) {
1.48 + ClearOnShutdown(&sInstance);
1.49 + } else {
1.50 + delete sInstance;
1.51 + sInstance = nullptr;
1.52 + }
1.53 + }
1.54 +
1.55 + return sInstance;
1.56 +}
1.57 +
1.58 +bool nsNameSpaceManager::Init()
1.59 +{
1.60 + nsresult rv;
1.61 +#define REGISTER_NAMESPACE(uri, id) \
1.62 + rv = AddNameSpace(NS_LITERAL_STRING(uri), id); \
1.63 + NS_ENSURE_SUCCESS(rv, false)
1.64 +
1.65 + // Need to be ordered according to ID.
1.66 + REGISTER_NAMESPACE(kXMLNSNameSpaceURI, kNameSpaceID_XMLNS);
1.67 + REGISTER_NAMESPACE(kXMLNameSpaceURI, kNameSpaceID_XML);
1.68 + REGISTER_NAMESPACE(kXHTMLNameSpaceURI, kNameSpaceID_XHTML);
1.69 + REGISTER_NAMESPACE(kXLinkNameSpaceURI, kNameSpaceID_XLink);
1.70 + REGISTER_NAMESPACE(kXSLTNameSpaceURI, kNameSpaceID_XSLT);
1.71 + REGISTER_NAMESPACE(kXBLNameSpaceURI, kNameSpaceID_XBL);
1.72 + REGISTER_NAMESPACE(kMathMLNameSpaceURI, kNameSpaceID_MathML);
1.73 + REGISTER_NAMESPACE(kRDFNameSpaceURI, kNameSpaceID_RDF);
1.74 + REGISTER_NAMESPACE(kXULNameSpaceURI, kNameSpaceID_XUL);
1.75 + REGISTER_NAMESPACE(kSVGNameSpaceURI, kNameSpaceID_SVG);
1.76 +
1.77 +#undef REGISTER_NAMESPACE
1.78 +
1.79 + return true;
1.80 +}
1.81 +
1.82 +nsresult
1.83 +nsNameSpaceManager::RegisterNameSpace(const nsAString& aURI,
1.84 + int32_t& aNameSpaceID)
1.85 +{
1.86 + if (aURI.IsEmpty()) {
1.87 + aNameSpaceID = kNameSpaceID_None; // xmlns="", see bug 75700 for details
1.88 +
1.89 + return NS_OK;
1.90 + }
1.91 +
1.92 + nsresult rv = NS_OK;
1.93 + if (!mURIToIDTable.Get(&aURI, &aNameSpaceID)) {
1.94 + aNameSpaceID = mURIArray.Length() + 1; // id is index + 1
1.95 +
1.96 + rv = AddNameSpace(aURI, aNameSpaceID);
1.97 + if (NS_FAILED(rv)) {
1.98 + aNameSpaceID = kNameSpaceID_Unknown;
1.99 + }
1.100 + }
1.101 +
1.102 + NS_POSTCONDITION(aNameSpaceID >= -1, "Bogus namespace ID");
1.103 +
1.104 + return rv;
1.105 +}
1.106 +
1.107 +nsresult
1.108 +nsNameSpaceManager::GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI)
1.109 +{
1.110 + NS_PRECONDITION(aNameSpaceID >= 0, "Bogus namespace ID");
1.111 +
1.112 + int32_t index = aNameSpaceID - 1; // id is index + 1
1.113 + if (index < 0 || index >= int32_t(mURIArray.Length())) {
1.114 + aURI.Truncate();
1.115 +
1.116 + return NS_ERROR_ILLEGAL_VALUE;
1.117 + }
1.118 +
1.119 + aURI = *mURIArray.ElementAt(index);
1.120 +
1.121 + return NS_OK;
1.122 +}
1.123 +
1.124 +int32_t
1.125 +nsNameSpaceManager::GetNameSpaceID(const nsAString& aURI)
1.126 +{
1.127 + if (aURI.IsEmpty()) {
1.128 + return kNameSpaceID_None; // xmlns="", see bug 75700 for details
1.129 + }
1.130 +
1.131 + int32_t nameSpaceID;
1.132 +
1.133 + if (mURIToIDTable.Get(&aURI, &nameSpaceID)) {
1.134 + NS_POSTCONDITION(nameSpaceID >= 0, "Bogus namespace ID");
1.135 + return nameSpaceID;
1.136 + }
1.137 +
1.138 + return kNameSpaceID_Unknown;
1.139 +}
1.140 +
1.141 +nsresult
1.142 +NS_NewElement(Element** aResult,
1.143 + already_AddRefed<nsINodeInfo>&& aNodeInfo,
1.144 + FromParser aFromParser)
1.145 +{
1.146 + nsCOMPtr<nsINodeInfo> ni = aNodeInfo;
1.147 + int32_t ns = ni->NamespaceID();
1.148 + if (ns == kNameSpaceID_XHTML) {
1.149 + return NS_NewHTMLElement(aResult, ni.forget(), aFromParser);
1.150 + }
1.151 +#ifdef MOZ_XUL
1.152 + if (ns == kNameSpaceID_XUL) {
1.153 + return NS_NewXULElement(aResult, ni.forget());
1.154 + }
1.155 +#endif
1.156 + if (ns == kNameSpaceID_MathML) {
1.157 + return NS_NewMathMLElement(aResult, ni.forget());
1.158 + }
1.159 + if (ns == kNameSpaceID_SVG) {
1.160 + return NS_NewSVGElement(aResult, ni.forget(), aFromParser);
1.161 + }
1.162 + if (ns == kNameSpaceID_XBL && ni->Equals(nsGkAtoms::children)) {
1.163 + NS_ADDREF(*aResult = new XBLChildrenElement(ni.forget()));
1.164 + return NS_OK;
1.165 + }
1.166 +
1.167 + return NS_NewXMLElement(aResult, ni.forget());
1.168 +}
1.169 +
1.170 +bool
1.171 +nsNameSpaceManager::HasElementCreator(int32_t aNameSpaceID)
1.172 +{
1.173 + return aNameSpaceID == kNameSpaceID_XHTML ||
1.174 +#ifdef MOZ_XUL
1.175 + aNameSpaceID == kNameSpaceID_XUL ||
1.176 +#endif
1.177 + aNameSpaceID == kNameSpaceID_MathML ||
1.178 + aNameSpaceID == kNameSpaceID_SVG ||
1.179 + false;
1.180 +}
1.181 +
1.182 +nsresult nsNameSpaceManager::AddNameSpace(const nsAString& aURI,
1.183 + const int32_t aNameSpaceID)
1.184 +{
1.185 + if (aNameSpaceID < 0) {
1.186 + // We've wrapped... Can't do anything else here; just bail.
1.187 + return NS_ERROR_OUT_OF_MEMORY;
1.188 + }
1.189 +
1.190 + NS_ASSERTION(aNameSpaceID - 1 == (int32_t) mURIArray.Length(),
1.191 + "BAD! AddNameSpace not called in right order!");
1.192 +
1.193 + nsString* uri = new nsString(aURI);
1.194 + if (!uri || !mURIArray.AppendElement(uri)) {
1.195 + delete uri;
1.196 + return NS_ERROR_OUT_OF_MEMORY;
1.197 + }
1.198 +
1.199 + mURIToIDTable.Put(uri, aNameSpaceID);
1.200 +
1.201 + return NS_OK;
1.202 +}
