summaryrefslogtreecommitdiffstats
path: root/dom/base/NodeInfo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'dom/base/NodeInfo.cpp')
-rw-r--r--dom/base/NodeInfo.cpp183
1 files changed, 183 insertions, 0 deletions
diff --git a/dom/base/NodeInfo.cpp b/dom/base/NodeInfo.cpp
new file mode 100644
index 0000000000..0a66d4deff
--- /dev/null
+++ b/dom/base/NodeInfo.cpp
@@ -0,0 +1,183 @@
+/* -*- 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/. */
+
+/*
+ * Class that represents a prefix/namespace/localName triple; a single
+ * nodeinfo is shared by all elements in a document that have that
+ * prefix, namespace, and localName.
+ */
+
+#include "mozilla/dom/NodeInfo.h"
+#include "mozilla/dom/NodeInfoInlines.h"
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Likely.h"
+
+#include "nsNodeInfoManager.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsAtom.h"
+#include "nsDOMString.h"
+#include "nsCRT.h"
+#include "nsINode.h"
+#include "nsContentUtils.h"
+#include "nsReadableUtils.h"
+#include "mozilla/Sprintf.h"
+#include "mozilla/dom/Document.h"
+#include "nsGkAtoms.h"
+#include "nsCCUncollectableMarker.h"
+#include "nsNameSpaceManager.h"
+
+using namespace mozilla;
+using mozilla::dom::NodeInfo;
+
+NodeInfo::~NodeInfo() {
+ mOwnerManager->RemoveNodeInfo(this);
+
+ // We can't use NS_IF_RELEASE because mName is const.
+ if (mInner.mName) {
+ mInner.mName->Release();
+ }
+ NS_IF_RELEASE(mInner.mPrefix);
+ NS_IF_RELEASE(mInner.mExtraName);
+}
+
+NodeInfo::NodeInfo(nsAtom* aName, nsAtom* aPrefix, int32_t aNamespaceID,
+ uint16_t aNodeType, nsAtom* aExtraName,
+ nsNodeInfoManager* aOwnerManager)
+ : mDocument(aOwnerManager->GetDocument()),
+ mInner(aName, aPrefix, aNamespaceID, aNodeType, aExtraName),
+ mOwnerManager(aOwnerManager) {
+ CheckValidNodeInfo(aNodeType, aName, aNamespaceID, aExtraName);
+
+ NS_IF_ADDREF(mInner.mName);
+ NS_IF_ADDREF(mInner.mPrefix);
+ NS_IF_ADDREF(mInner.mExtraName);
+
+ // Now compute our cached members.
+
+ // Qualified name. If we have no prefix, use ToString on
+ // mInner.mName so that we get to share its buffer.
+ if (aPrefix) {
+ mQualifiedName = nsDependentAtomString(mInner.mPrefix) + u":"_ns +
+ nsDependentAtomString(mInner.mName);
+ } else {
+ mInner.mName->ToString(mQualifiedName);
+ }
+
+ MOZ_ASSERT_IF(aNodeType != nsINode::ELEMENT_NODE &&
+ aNodeType != nsINode::ATTRIBUTE_NODE &&
+ aNodeType != UINT16_MAX,
+ aNamespaceID == kNameSpaceID_None && !aPrefix);
+
+ switch (aNodeType) {
+ case nsINode::ELEMENT_NODE:
+ case nsINode::ATTRIBUTE_NODE:
+ // Correct the case for HTML
+ if (aNodeType == nsINode::ELEMENT_NODE &&
+ aNamespaceID == kNameSpaceID_XHTML && GetDocument() &&
+ GetDocument()->IsHTMLDocument()) {
+ nsContentUtils::ASCIIToUpper(mQualifiedName, mNodeName);
+ } else {
+ mNodeName = mQualifiedName;
+ }
+ mInner.mName->ToString(mLocalName);
+ break;
+ case nsINode::TEXT_NODE:
+ case nsINode::CDATA_SECTION_NODE:
+ case nsINode::COMMENT_NODE:
+ case nsINode::DOCUMENT_NODE:
+ case nsINode::DOCUMENT_FRAGMENT_NODE:
+ mInner.mName->ToString(mNodeName);
+ SetDOMStringToNull(mLocalName);
+ break;
+ case nsINode::PROCESSING_INSTRUCTION_NODE:
+ case nsINode::DOCUMENT_TYPE_NODE:
+ mInner.mExtraName->ToString(mNodeName);
+ SetDOMStringToNull(mLocalName);
+ break;
+ default:
+ MOZ_ASSERT(aNodeType == UINT16_MAX, "Unknown node type");
+ }
+}
+
+// nsISupports
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(NodeInfo)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_0(NodeInfo)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(NodeInfo)
+ if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
+ char name[72];
+ uint32_t nsid = tmp->NamespaceID();
+ nsAtomCString localName(tmp->NameAtom());
+ const char* nsuri = nsNameSpaceManager::GetNameSpaceDisplayName(nsid);
+ SprintfLiteral(name, "NodeInfo %s %s", nsuri, localName.get());
+
+ cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
+ } else {
+ NS_IMPL_CYCLE_COLLECTION_DESCRIBE(NodeInfo, tmp->mRefCnt.get())
+ }
+
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwnerManager)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(NodeInfo)
+ return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(NodeInfo)
+ return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(NodeInfo)
+ return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
+
+void NodeInfo::GetName(nsAString& aName) const {
+ mInner.mName->ToString(aName);
+}
+
+void NodeInfo::GetPrefix(nsAString& aPrefix) const {
+ if (mInner.mPrefix) {
+ mInner.mPrefix->ToString(aPrefix);
+ } else {
+ SetDOMStringToNull(aPrefix);
+ }
+}
+
+void NodeInfo::GetNamespaceURI(nsAString& aNameSpaceURI) const {
+ if (mInner.mNamespaceID > 0) {
+ nsresult rv = nsNameSpaceManager::GetInstance()->GetNameSpaceURI(
+ mInner.mNamespaceID, aNameSpaceURI);
+ // How can we possibly end up with a bogus namespace ID here?
+ if (NS_FAILED(rv)) {
+ MOZ_CRASH();
+ }
+ } else {
+ SetDOMStringToNull(aNameSpaceURI);
+ }
+}
+
+bool NodeInfo::NamespaceEquals(const nsAString& aNamespaceURI) const {
+ int32_t nsid = nsNameSpaceManager::GetInstance()->GetNameSpaceID(
+ aNamespaceURI, nsContentUtils::IsChromeDoc(mOwnerManager->GetDocument()));
+
+ return mozilla::dom::NodeInfo::NamespaceEquals(nsid);
+}
+
+void NodeInfo::DeleteCycleCollectable() {
+ RefPtr<nsNodeInfoManager> kungFuDeathGrip = mOwnerManager;
+ mozilla::Unused
+ << kungFuDeathGrip; // Just keeping value alive for longer than this
+ delete this;
+}
+
+bool NodeInfo::CanSkip() {
+ return mDocument && nsCCUncollectableMarker::InGeneration(
+ mDocument->GetMarkedCCGeneration());
+}