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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/base/nsTraversal.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | dom/base/nsTraversal.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/dom/base/nsTraversal.cpp b/dom/base/nsTraversal.cpp new file mode 100644 index 0000000000..33582a5e8d --- /dev/null +++ b/dom/base/nsTraversal.cpp @@ -0,0 +1,66 @@ +/* -*- 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); +} |