1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/base/src/nsNodeInfo.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,212 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/*
1.11 + * Class that represents a prefix/namespace/localName triple; a single
1.12 + * nodeinfo is shared by all elements in a document that have that
1.13 + * prefix, namespace, and localName.
1.14 + */
1.15 +
1.16 +#include "mozilla/ArrayUtils.h"
1.17 +#include "mozilla/Likely.h"
1.18 +
1.19 +#include "nscore.h"
1.20 +#include "nsNodeInfo.h"
1.21 +#include "nsNodeInfoManager.h"
1.22 +#include "nsCOMPtr.h"
1.23 +#include "nsString.h"
1.24 +#include "nsIAtom.h"
1.25 +#include "nsDOMString.h"
1.26 +#include "nsCRT.h"
1.27 +#include "nsContentUtils.h"
1.28 +#include "nsReadableUtils.h"
1.29 +#include "nsAutoPtr.h"
1.30 +#include "prprf.h"
1.31 +#include "nsIDocument.h"
1.32 +#include "nsGkAtoms.h"
1.33 +#include "nsCCUncollectableMarker.h"
1.34 +
1.35 +using namespace mozilla;
1.36 +
1.37 +nsNodeInfo::~nsNodeInfo()
1.38 +{
1.39 + mOwnerManager->RemoveNodeInfo(this);
1.40 +
1.41 + NS_RELEASE(mInner.mName);
1.42 + NS_IF_RELEASE(mInner.mPrefix);
1.43 + NS_IF_RELEASE(mInner.mExtraName);
1.44 +}
1.45 +
1.46 +
1.47 +nsNodeInfo::nsNodeInfo(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,
1.48 + uint16_t aNodeType, nsIAtom* aExtraName,
1.49 + nsNodeInfoManager *aOwnerManager)
1.50 +{
1.51 + CheckValidNodeInfo(aNodeType, aName, aNamespaceID, aExtraName);
1.52 + NS_ABORT_IF_FALSE(aOwnerManager, "Invalid aOwnerManager");
1.53 +
1.54 + // Initialize mInner
1.55 + NS_ADDREF(mInner.mName = aName);
1.56 + NS_IF_ADDREF(mInner.mPrefix = aPrefix);
1.57 + mInner.mNamespaceID = aNamespaceID;
1.58 + mInner.mNodeType = aNodeType;
1.59 + mOwnerManager = aOwnerManager;
1.60 + NS_IF_ADDREF(mInner.mExtraName = aExtraName);
1.61 +
1.62 + mDocument = aOwnerManager->GetDocument();
1.63 +
1.64 + // Now compute our cached members.
1.65 +
1.66 + // Qualified name. If we have no prefix, use ToString on
1.67 + // mInner.mName so that we get to share its buffer.
1.68 + if (aPrefix) {
1.69 + mQualifiedName = nsDependentAtomString(mInner.mPrefix) +
1.70 + NS_LITERAL_STRING(":") +
1.71 + nsDependentAtomString(mInner.mName);
1.72 + } else {
1.73 + mInner.mName->ToString(mQualifiedName);
1.74 + }
1.75 +
1.76 + MOZ_ASSERT_IF(aNodeType != nsIDOMNode::ELEMENT_NODE &&
1.77 + aNodeType != nsIDOMNode::ATTRIBUTE_NODE &&
1.78 + aNodeType != UINT16_MAX,
1.79 + aNamespaceID == kNameSpaceID_None && !aPrefix);
1.80 +
1.81 + switch (aNodeType) {
1.82 + case nsIDOMNode::ELEMENT_NODE:
1.83 + case nsIDOMNode::ATTRIBUTE_NODE:
1.84 + // Correct the case for HTML
1.85 + if (aNodeType == nsIDOMNode::ELEMENT_NODE &&
1.86 + aNamespaceID == kNameSpaceID_XHTML && GetDocument() &&
1.87 + GetDocument()->IsHTML()) {
1.88 + nsContentUtils::ASCIIToUpper(mQualifiedName, mNodeName);
1.89 + } else {
1.90 + mNodeName = mQualifiedName;
1.91 + }
1.92 + mInner.mName->ToString(mLocalName);
1.93 + break;
1.94 + case nsIDOMNode::TEXT_NODE:
1.95 + case nsIDOMNode::CDATA_SECTION_NODE:
1.96 + case nsIDOMNode::COMMENT_NODE:
1.97 + case nsIDOMNode::DOCUMENT_NODE:
1.98 + case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
1.99 + mInner.mName->ToString(mNodeName);
1.100 + SetDOMStringToNull(mLocalName);
1.101 + break;
1.102 + case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
1.103 + case nsIDOMNode::DOCUMENT_TYPE_NODE:
1.104 + mInner.mExtraName->ToString(mNodeName);
1.105 + SetDOMStringToNull(mLocalName);
1.106 + break;
1.107 + default:
1.108 + NS_ABORT_IF_FALSE(aNodeType == UINT16_MAX,
1.109 + "Unknown node type");
1.110 + }
1.111 +}
1.112 +
1.113 +
1.114 +// nsISupports
1.115 +
1.116 +NS_IMPL_CYCLE_COLLECTION_CLASS(nsNodeInfo)
1.117 +
1.118 +NS_IMPL_CYCLE_COLLECTION_UNLINK_0(nsNodeInfo)
1.119 +
1.120 +static const char* kNSURIs[] = {
1.121 + " ([none])",
1.122 + " (xmlns)",
1.123 + " (xml)",
1.124 + " (xhtml)",
1.125 + " (XLink)",
1.126 + " (XSLT)",
1.127 + " (XBL)",
1.128 + " (MathML)",
1.129 + " (RDF)",
1.130 + " (XUL)"
1.131 +};
1.132 +
1.133 +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsNodeInfo)
1.134 + if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
1.135 + char name[72];
1.136 + uint32_t nsid = tmp->NamespaceID();
1.137 + nsAtomCString localName(tmp->NameAtom());
1.138 + if (nsid < ArrayLength(kNSURIs)) {
1.139 + PR_snprintf(name, sizeof(name), "nsNodeInfo%s %s", kNSURIs[nsid],
1.140 + localName.get());
1.141 + }
1.142 + else {
1.143 + PR_snprintf(name, sizeof(name), "nsNodeInfo %s", localName.get());
1.144 + }
1.145 +
1.146 + cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
1.147 + }
1.148 + else {
1.149 + NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsNodeInfo, tmp->mRefCnt.get())
1.150 + }
1.151 +
1.152 + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwnerManager)
1.153 +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
1.154 +
1.155 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsNodeInfo)
1.156 + return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
1.157 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
1.158 +
1.159 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsNodeInfo)
1.160 + return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
1.161 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
1.162 +
1.163 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsNodeInfo)
1.164 + return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
1.165 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
1.166 +
1.167 +
1.168 +NS_IMPL_CYCLE_COLLECTING_ADDREF(nsNodeInfo)
1.169 +NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(nsNodeInfo, LastRelease())
1.170 +NS_INTERFACE_TABLE_HEAD(nsNodeInfo)
1.171 + NS_INTERFACE_TABLE(nsNodeInfo, nsINodeInfo)
1.172 + NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsNodeInfo)
1.173 +NS_INTERFACE_MAP_END
1.174 +
1.175 +// nsINodeInfo
1.176 +
1.177 +void
1.178 +nsNodeInfo::GetNamespaceURI(nsAString& aNameSpaceURI) const
1.179 +{
1.180 + if (mInner.mNamespaceID > 0) {
1.181 + nsresult rv =
1.182 + nsContentUtils::NameSpaceManager()->GetNameSpaceURI(mInner.mNamespaceID,
1.183 + aNameSpaceURI);
1.184 + // How can we possibly end up with a bogus namespace ID here?
1.185 + if (NS_FAILED(rv)) {
1.186 + MOZ_CRASH();
1.187 + }
1.188 + } else {
1.189 + SetDOMStringToNull(aNameSpaceURI);
1.190 + }
1.191 +}
1.192 +
1.193 +
1.194 +bool
1.195 +nsNodeInfo::NamespaceEquals(const nsAString& aNamespaceURI) const
1.196 +{
1.197 + int32_t nsid =
1.198 + nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);
1.199 +
1.200 + return nsINodeInfo::NamespaceEquals(nsid);
1.201 +}
1.202 +
1.203 +void
1.204 +nsNodeInfo::LastRelease()
1.205 +{
1.206 + nsRefPtr<nsNodeInfoManager> kungFuDeathGrip = mOwnerManager;
1.207 + delete this;
1.208 +}
1.209 +
1.210 +bool
1.211 +nsNodeInfo::CanSkip()
1.212 +{
1.213 + return mDocument &&
1.214 + nsCCUncollectableMarker::InGeneration(mDocument->GetMarkedCCGeneration());
1.215 +}
