зеркало из https://github.com/mozilla/gecko-dev.git
282 строки
8.5 KiB
C++
282 строки
8.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* A class for managing namespace IDs and mapping back and forth
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* between namespace IDs and namespace URIs.
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*/
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#include "nsNameSpaceManager.h"
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#include "nscore.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "nsAtom.h"
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#include "nsCOMArray.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsGkAtoms.h"
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#include "nsIDocument.h"
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#include "nsString.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/dom/XBLChildrenElement.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/Preferences.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static const char* kPrefSVGDisabled = "svg.disabled";
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static const char* kPrefMathMLDisabled = "mathml.disabled";
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static const char* kObservedPrefs[] = {
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kPrefMathMLDisabled,
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kPrefSVGDisabled,
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nullptr
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};
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StaticRefPtr<nsNameSpaceManager> nsNameSpaceManager::sInstance;
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/* static */ nsNameSpaceManager*
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nsNameSpaceManager::GetInstance() {
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if (!sInstance) {
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sInstance = new nsNameSpaceManager();
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if (sInstance->Init()) {
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ClearOnShutdown(&sInstance);
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} else {
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delete sInstance;
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sInstance = nullptr;
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}
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}
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return sInstance;
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}
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bool nsNameSpaceManager::Init()
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{
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nsresult rv;
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#define REGISTER_NAMESPACE(uri, id) \
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rv = AddNameSpace(dont_AddRef(uri), id); \
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NS_ENSURE_SUCCESS(rv, false)
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#define REGISTER_DISABLED_NAMESPACE(uri, id) \
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rv = AddDisabledNameSpace(dont_AddRef(uri), id); \
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NS_ENSURE_SUCCESS(rv, false)
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mozilla::Preferences::AddStrongObservers(this, kObservedPrefs);
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mMathMLDisabled = mozilla::Preferences::GetBool(kPrefMathMLDisabled);
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mSVGDisabled = mozilla::Preferences::GetBool(kPrefSVGDisabled);
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// Need to be ordered according to ID.
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MOZ_ASSERT(mURIArray.IsEmpty());
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REGISTER_NAMESPACE(nsGkAtoms::_empty, kNameSpaceID_None);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xmlns, kNameSpaceID_XMLNS);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xml, kNameSpaceID_XML);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xhtml, kNameSpaceID_XHTML);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xlink, kNameSpaceID_XLink);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xslt, kNameSpaceID_XSLT);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xbl, kNameSpaceID_XBL);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_mathml, kNameSpaceID_MathML);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_rdf, kNameSpaceID_RDF);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_xul, kNameSpaceID_XUL);
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REGISTER_NAMESPACE(nsGkAtoms::nsuri_svg, kNameSpaceID_SVG);
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REGISTER_DISABLED_NAMESPACE(nsGkAtoms::nsuri_mathml, kNameSpaceID_disabled_MathML);
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REGISTER_DISABLED_NAMESPACE(nsGkAtoms::nsuri_svg, kNameSpaceID_disabled_SVG);
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#undef REGISTER_NAMESPACE
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#undef REGISTER_DISABLED_NAMESPACE
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return true;
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}
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nsresult
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nsNameSpaceManager::RegisterNameSpace(const nsAString& aURI,
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int32_t& aNameSpaceID)
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{
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if (aURI.IsEmpty()) {
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aNameSpaceID = kNameSpaceID_None; // xmlns="", see bug 75700 for details
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return NS_OK;
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}
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RefPtr<nsAtom> atom = NS_Atomize(aURI);
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nsresult rv = NS_OK;
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if (!mURIToIDTable.Get(atom, &aNameSpaceID)) {
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aNameSpaceID = mURIArray.Length();
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rv = AddNameSpace(atom.forget(), aNameSpaceID);
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if (NS_FAILED(rv)) {
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aNameSpaceID = kNameSpaceID_Unknown;
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}
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}
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MOZ_ASSERT(aNameSpaceID >= -1, "Bogus namespace ID");
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return rv;
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}
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nsresult
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nsNameSpaceManager::GetNameSpaceURI(int32_t aNameSpaceID, nsAString& aURI)
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{
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NS_PRECONDITION(aNameSpaceID >= 0, "Bogus namespace ID");
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// We have historically treated GetNameSpaceURI calls for kNameSpaceID_None
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// as erroneous.
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if (aNameSpaceID <= 0 || aNameSpaceID >= int32_t(mURIArray.Length())) {
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aURI.Truncate();
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return NS_ERROR_ILLEGAL_VALUE;
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}
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mURIArray.ElementAt(aNameSpaceID)->ToString(aURI);
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return NS_OK;
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}
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int32_t
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nsNameSpaceManager::GetNameSpaceID(const nsAString& aURI,
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bool aInChromeDoc)
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{
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if (aURI.IsEmpty()) {
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return kNameSpaceID_None; // xmlns="", see bug 75700 for details
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}
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RefPtr<nsAtom> atom = NS_Atomize(aURI);
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return GetNameSpaceID(atom, aInChromeDoc);
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}
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int32_t
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nsNameSpaceManager::GetNameSpaceID(nsAtom* aURI,
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bool aInChromeDoc)
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{
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if (aURI == nsGkAtoms::_empty) {
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return kNameSpaceID_None; // xmlns="", see bug 75700 for details
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}
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int32_t nameSpaceID;
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if (!aInChromeDoc
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&& (mMathMLDisabled || mSVGDisabled)
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&& mDisabledURIToIDTable.Get(aURI, &nameSpaceID)
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&& ((mMathMLDisabled && kNameSpaceID_disabled_MathML == nameSpaceID) ||
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(mSVGDisabled && kNameSpaceID_disabled_SVG == nameSpaceID))) {
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MOZ_ASSERT(nameSpaceID >= 0, "Bogus namespace ID");
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return nameSpaceID;
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}
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if (mURIToIDTable.Get(aURI, &nameSpaceID)) {
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MOZ_ASSERT(nameSpaceID >= 0, "Bogus namespace ID");
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return nameSpaceID;
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}
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return kNameSpaceID_Unknown;
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}
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nsresult
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NS_NewElement(Element** aResult,
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
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FromParser aFromParser,
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const nsAString* aIs)
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{
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RefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo;
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int32_t ns = ni->NamespaceID();
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if (ns == kNameSpaceID_XHTML) {
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RefPtr<nsAtom> isAtom = aIs ? NS_Atomize(*aIs) : nullptr;
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return NS_NewHTMLElement(aResult, ni.forget(), aFromParser, isAtom);
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}
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#ifdef MOZ_XUL
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if (ns == kNameSpaceID_XUL) {
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return NS_NewXULElement(aResult, ni.forget(), aFromParser);
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}
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#endif
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if (ns == kNameSpaceID_MathML) {
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// If the mathml.disabled pref. is true, convert all MathML nodes into
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// disabled MathML nodes by swapping the namespace.
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if (ni->NodeInfoManager()->MathMLEnabled()) {
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return NS_NewMathMLElement(aResult, ni.forget());
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}
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RefPtr<mozilla::dom::NodeInfo> genericXMLNI =
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ni->NodeInfoManager()->
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GetNodeInfo(ni->NameAtom(), ni->GetPrefixAtom(),
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kNameSpaceID_disabled_MathML, ni->NodeType(), ni->GetExtraName());
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return NS_NewXMLElement(aResult, genericXMLNI.forget());
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}
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if (ns == kNameSpaceID_SVG) {
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// If the svg.disabled pref. is true, convert all SVG nodes into
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// disabled SVG nodes by swapping the namespace.
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if (ni->NodeInfoManager()->SVGEnabled()) {
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return NS_NewSVGElement(aResult, ni.forget(), aFromParser);
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}
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RefPtr<mozilla::dom::NodeInfo> genericXMLNI =
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ni->NodeInfoManager()->
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GetNodeInfo(ni->NameAtom(), ni->GetPrefixAtom(),
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kNameSpaceID_disabled_SVG, ni->NodeType(), ni->GetExtraName());
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return NS_NewXMLElement(aResult, genericXMLNI.forget());
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}
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if (ns == kNameSpaceID_XBL && ni->Equals(nsGkAtoms::children)) {
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NS_ADDREF(*aResult = new XBLChildrenElement(ni.forget()));
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return NS_OK;
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}
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return NS_NewXMLElement(aResult, ni.forget());
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}
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bool
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nsNameSpaceManager::HasElementCreator(int32_t aNameSpaceID)
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{
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return aNameSpaceID == kNameSpaceID_XHTML ||
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#ifdef MOZ_XUL
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aNameSpaceID == kNameSpaceID_XUL ||
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#endif
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aNameSpaceID == kNameSpaceID_MathML ||
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aNameSpaceID == kNameSpaceID_SVG ||
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false;
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}
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nsresult nsNameSpaceManager::AddNameSpace(already_AddRefed<nsAtom> aURI,
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const int32_t aNameSpaceID)
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{
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RefPtr<nsAtom> uri = aURI;
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if (aNameSpaceID < 0) {
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// We've wrapped... Can't do anything else here; just bail.
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return NS_ERROR_OUT_OF_MEMORY;
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}
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MOZ_ASSERT(aNameSpaceID == (int32_t) mURIArray.Length());
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mURIArray.AppendElement(uri.forget());
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mURIToIDTable.Put(mURIArray.LastElement(), aNameSpaceID);
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return NS_OK;
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}
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nsresult
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nsNameSpaceManager::AddDisabledNameSpace(already_AddRefed<nsAtom> aURI,
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const int32_t aNameSpaceID)
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{
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RefPtr<nsAtom> uri = aURI;
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if (aNameSpaceID < 0) {
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// We've wrapped... Can't do anything else here; just bail.
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return NS_ERROR_OUT_OF_MEMORY;
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}
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MOZ_ASSERT(aNameSpaceID == (int32_t) mURIArray.Length());
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mURIArray.AppendElement(uri.forget());
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mDisabledURIToIDTable.Put(mURIArray.LastElement(), aNameSpaceID);
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return NS_OK;
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}
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// nsISupports
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NS_IMPL_ISUPPORTS(nsNameSpaceManager,
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nsIObserver)
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// nsIObserver
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NS_IMETHODIMP
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nsNameSpaceManager::Observe(nsISupports* aObject, const char* aTopic,
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const char16_t* aMessage)
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{
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mMathMLDisabled = mozilla::Preferences::GetBool(kPrefMathMLDisabled);
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mSVGDisabled = mozilla::Preferences::GetBool(kPrefSVGDisabled);
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return NS_OK;
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}
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