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-rw-r--r--dom/xslt/xpath/XPathResult.cpp340
1 files changed, 340 insertions, 0 deletions
diff --git a/dom/xslt/xpath/XPathResult.cpp b/dom/xslt/xpath/XPathResult.cpp
new file mode 100644
index 000000000..33315c942
--- /dev/null
+++ b/dom/xslt/xpath/XPathResult.cpp
@@ -0,0 +1,340 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+#include "XPathResult.h"
+#include "txExprResult.h"
+#include "txNodeSet.h"
+#include "nsError.h"
+#include "mozilla/dom/Attr.h"
+#include "mozilla/dom/Element.h"
+#include "nsDOMClassInfoID.h"
+#include "nsIDOMNode.h"
+#include "nsIDOMDocument.h"
+#include "nsDOMString.h"
+#include "txXPathTreeWalker.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/dom/XPathResultBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+XPathResult::XPathResult(nsINode* aParent)
+ : mParent(aParent),
+ mDocument(nullptr),
+ mCurrentPos(0),
+ mResultType(ANY_TYPE),
+ mInvalidIteratorState(true),
+ mBooleanResult(false),
+ mNumberResult(0)
+{
+}
+
+XPathResult::XPathResult(const XPathResult &aResult)
+ : mParent(aResult.mParent),
+ mResult(aResult.mResult),
+ mResultNodes(aResult.mResultNodes),
+ mDocument(aResult.mDocument),
+ mContextNode(aResult.mContextNode),
+ mCurrentPos(0),
+ mResultType(aResult.mResultType),
+ mInvalidIteratorState(aResult.mInvalidIteratorState)
+{
+ if (mDocument) {
+ mDocument->AddMutationObserver(this);
+ }
+}
+
+XPathResult::~XPathResult()
+{
+ RemoveObserver();
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(XPathResult)
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(XPathResult)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(XPathResult)
+ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
+ {
+ tmp->RemoveObserver();
+ }
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(XPathResult)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mResultNodes)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(XPathResult)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(XPathResult)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(XPathResult)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
+ NS_INTERFACE_MAP_ENTRY(nsIXPathResult)
+ NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPathResult)
+NS_INTERFACE_MAP_END
+
+JSObject*
+XPathResult::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+ return XPathResultBinding::Wrap(aCx, this, aGivenProto);
+}
+
+void
+XPathResult::RemoveObserver()
+{
+ if (mDocument) {
+ mDocument->RemoveMutationObserver(this);
+ }
+}
+
+nsINode*
+XPathResult::IterateNext(ErrorResult& aRv)
+{
+ if (!isIterator()) {
+ aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
+ return nullptr;
+ }
+
+ if (mDocument) {
+ mDocument->FlushPendingNotifications(Flush_Content);
+ }
+
+ if (mInvalidIteratorState) {
+ aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+ return nullptr;
+ }
+
+ return mResultNodes.SafeObjectAt(mCurrentPos++);
+}
+
+void
+XPathResult::NodeWillBeDestroyed(const nsINode* aNode)
+{
+ nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
+ // Set to null to avoid unregistring unnecessarily
+ mDocument = nullptr;
+ Invalidate(aNode->IsNodeOfType(nsINode::eCONTENT) ?
+ static_cast<const nsIContent*>(aNode) : nullptr);
+}
+
+void
+XPathResult::CharacterDataChanged(nsIDocument* aDocument,
+ nsIContent *aContent,
+ CharacterDataChangeInfo* aInfo)
+{
+ Invalidate(aContent);
+}
+
+void
+XPathResult::AttributeChanged(nsIDocument* aDocument,
+ Element* aElement,
+ int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType,
+ const nsAttrValue* aOldValue)
+{
+ Invalidate(aElement);
+}
+
+void
+XPathResult::ContentAppended(nsIDocument* aDocument,
+ nsIContent* aContainer,
+ nsIContent* aFirstNewContent,
+ int32_t aNewIndexInContainer)
+{
+ Invalidate(aContainer);
+}
+
+void
+XPathResult::ContentInserted(nsIDocument* aDocument,
+ nsIContent* aContainer,
+ nsIContent* aChild,
+ int32_t aIndexInContainer)
+{
+ Invalidate(aContainer);
+}
+
+void
+XPathResult::ContentRemoved(nsIDocument* aDocument,
+ nsIContent* aContainer,
+ nsIContent* aChild,
+ int32_t aIndexInContainer,
+ nsIContent* aPreviousSibling)
+{
+ Invalidate(aContainer);
+}
+
+nsresult
+XPathResult::SetExprResult(txAExprResult* aExprResult, uint16_t aResultType,
+ nsINode* aContextNode)
+{
+ MOZ_ASSERT(aExprResult);
+
+ if ((isSnapshot(aResultType) || isIterator(aResultType) ||
+ isNode(aResultType)) &&
+ aExprResult->getResultType() != txAExprResult::NODESET) {
+ // The DOM spec doesn't really say what should happen when reusing an
+ // XPathResult and an error is thrown. Let's not touch the XPathResult
+ // in that case.
+ return NS_ERROR_DOM_TYPE_ERR;
+ }
+
+ mResultType = aResultType;
+ mContextNode = do_GetWeakReference(aContextNode);
+
+ if (mDocument) {
+ mDocument->RemoveMutationObserver(this);
+ mDocument = nullptr;
+ }
+
+ mResultNodes.Clear();
+
+ // XXX This will keep the recycler alive, should we clear it?
+ mResult = aExprResult;
+ switch (mResultType) {
+ case BOOLEAN_TYPE:
+ {
+ mBooleanResult = mResult->booleanValue();
+ break;
+ }
+ case NUMBER_TYPE:
+ {
+ mNumberResult = mResult->numberValue();
+ break;
+ }
+ case STRING_TYPE:
+ {
+ mResult->stringValue(mStringResult);
+ break;
+ }
+ default:
+ {
+ MOZ_ASSERT(isNode() || isIterator() || isSnapshot());
+ }
+ }
+
+ if (aExprResult->getResultType() == txAExprResult::NODESET) {
+ txNodeSet *nodeSet = static_cast<txNodeSet*>(aExprResult);
+ int32_t i, count = nodeSet->size();
+ for (i = 0; i < count; ++i) {
+ nsINode* node = txXPathNativeNode::getNode(nodeSet->get(i));
+ mResultNodes.AppendObject(node);
+ }
+
+ if (count > 0) {
+ mResult = nullptr;
+ }
+ }
+
+ if (!isIterator()) {
+ return NS_OK;
+ }
+
+ mInvalidIteratorState = false;
+
+ if (mResultNodes.Count() > 0) {
+ // If we support the document() function in DOM-XPath we need to
+ // observe all documents that we have resultnodes in.
+ mDocument = mResultNodes[0]->OwnerDoc();
+ NS_ASSERTION(mDocument, "We need a document!");
+ if (mDocument) {
+ mDocument->AddMutationObserver(this);
+ }
+ }
+
+ return NS_OK;
+}
+
+void
+XPathResult::Invalidate(const nsIContent* aChangeRoot)
+{
+ nsCOMPtr<nsINode> contextNode = do_QueryReferent(mContextNode);
+ if (contextNode && aChangeRoot && aChangeRoot->GetBindingParent()) {
+ // If context node is in anonymous content, changes to
+ // non-anonymous content need to invalidate the XPathResult. If
+ // the changes are happening in a different anonymous trees, no
+ // invalidation should happen.
+ nsIContent* ctxBindingParent = nullptr;
+ if (contextNode->IsNodeOfType(nsINode::eCONTENT)) {
+ ctxBindingParent =
+ static_cast<nsIContent*>(contextNode.get())
+ ->GetBindingParent();
+ } else if (contextNode->IsNodeOfType(nsINode::eATTRIBUTE)) {
+ Element* parent =
+ static_cast<Attr*>(contextNode.get())->GetElement();
+ if (parent) {
+ ctxBindingParent = parent->GetBindingParent();
+ }
+ }
+ if (ctxBindingParent != aChangeRoot->GetBindingParent()) {
+ return;
+ }
+ }
+
+ mInvalidIteratorState = true;
+ // Make sure nulling out mDocument is the last thing we do.
+ if (mDocument) {
+ mDocument->RemoveMutationObserver(this);
+ mDocument = nullptr;
+ }
+}
+
+nsresult
+XPathResult::GetExprResult(txAExprResult** aExprResult)
+{
+ if (isIterator() && mInvalidIteratorState) {
+ return NS_ERROR_DOM_INVALID_STATE_ERR;
+ }
+
+ if (mResult) {
+ NS_ADDREF(*aExprResult = mResult);
+
+ return NS_OK;
+ }
+
+ if (mResultNodes.Count() == 0) {
+ return NS_ERROR_DOM_INVALID_STATE_ERR;
+ }
+
+ RefPtr<txNodeSet> nodeSet = new txNodeSet(nullptr);
+ if (!nodeSet) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ uint32_t i, count = mResultNodes.Count();
+ for (i = 0; i < count; ++i) {
+ nsAutoPtr<txXPathNode> node(txXPathNativeNode::createXPathNode(mResultNodes[i]));
+ if (!node) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ nodeSet->append(*node);
+ }
+
+ NS_ADDREF(*aExprResult = nodeSet);
+
+ return NS_OK;
+}
+
+nsresult
+XPathResult::Clone(nsIXPathResult **aResult)
+{
+ *aResult = nullptr;
+
+ if (isIterator() && mInvalidIteratorState) {
+ return NS_ERROR_DOM_INVALID_STATE_ERR;
+ }
+
+ NS_ADDREF(*aResult = new XPathResult(*this));
+
+ return NS_OK;
+}
+
+} // namespace dom
+} // namespace mozilla