/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * 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 "nsTraversal.h" #include "nsError.h" #include "nsINode.h" #include "mozilla/AutoRestore.h" #include "mozilla/dom/NodeFilterBinding.h" #include "nsGkAtoms.h" using namespace mozilla; using namespace mozilla::dom; nsTraversal::nsTraversal(nsINode* aRoot, uint32_t aWhatToShow, NodeFilter* aFilter) : mRoot(aRoot), mWhatToShow(aWhatToShow), mFilter(aFilter), mInAcceptNode(false) { NS_ASSERTION(aRoot, "invalid root in call to nsTraversal constructor"); } nsTraversal::~nsTraversal() { /* destructor code */ } /* * Tests if and how a node should be filtered. Uses mWhatToShow and * mFilter to test the node. * @param aNode Node to test * @param aResult Whether we succeeded * @returns Filtervalue. See NodeFilter.webidl */ int16_t nsTraversal::TestNode(nsINode* aNode, mozilla::ErrorResult& aResult, nsCOMPtr<nsINode>* aUnskippedNode) { if (mInAcceptNode) { aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); return 0; } uint16_t nodeType = aNode->NodeType(); if (nodeType <= 12 && !((1 << (nodeType - 1)) & mWhatToShow)) { return NodeFilter_Binding::FILTER_SKIP; } if (aUnskippedNode) { *aUnskippedNode = aNode; } if (!mFilter) { // No filter, just accept return NodeFilter_Binding::FILTER_ACCEPT; } AutoRestore<bool> inAcceptNode(mInAcceptNode); mInAcceptNode = true; // No need to pass in an execution reason, since the generated default, // "NodeFilter.acceptNode", is pretty much exactly what we'd say anyway. return mFilter->AcceptNode(*aNode, aResult, nullptr, CallbackObject::eRethrowExceptions); }