Add m-esr52 at 52.6.0

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