The Tor Browser / file comparison
comparison: content/base/src/nsTraversal.cpp
content/base/src/nsTraversal.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:5c2c822ae909 |
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "nsTraversal.h" | |
| 8 | |
| 9 #include "nsIDOMNode.h" | |
| 10 #include "nsError.h" | |
| 11 #include "nsINode.h" | |
| 12 #include "mozilla/AutoRestore.h" | |
| 13 | |
| 14 #include "nsGkAtoms.h" | |
| 15 | |
| 16 using namespace mozilla; | |
| 17 using namespace mozilla::dom; | |
| 18 | |
| 19 nsTraversal::nsTraversal(nsINode *aRoot, | |
| 20 uint32_t aWhatToShow, | |
| 21 const NodeFilterHolder &aFilter) : | |
| 22 mRoot(aRoot), | |
| 23 mWhatToShow(aWhatToShow), | |
| 24 mFilter(aFilter), | |
| 25 mInAcceptNode(false) | |
| 26 { | |
| 27 NS_ASSERTION(aRoot, "invalid root in call to nsTraversal constructor"); | |
| 28 } | |
| 29 | |
| 30 nsTraversal::~nsTraversal() | |
| 31 { | |
| 32 /* destructor code */ | |
| 33 } | |
| 34 | |
| 35 /* | |
| 36 * Tests if and how a node should be filtered. Uses mWhatToShow and | |
| 37 * mFilter to test the node. | |
| 38 * @param aNode Node to test | |
| 39 * @param aResult Whether we succeeded | |
| 40 * @returns Filtervalue. See nsIDOMNodeFilter.idl | |
| 41 */ | |
| 42 int16_t | |
| 43 nsTraversal::TestNode(nsINode* aNode, mozilla::ErrorResult& aResult) | |
| 44 { | |
| 45 if (mInAcceptNode) { | |
| 46 aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); | |
| 47 return 0; | |
| 48 } | |
| 49 | |
| 50 uint16_t nodeType = aNode->NodeType(); | |
| 51 | |
| 52 if (nodeType <= 12 && !((1 << (nodeType-1)) & mWhatToShow)) { | |
| 53 return nsIDOMNodeFilter::FILTER_SKIP; | |
| 54 } | |
| 55 | |
| 56 if (!mFilter.GetISupports()) { | |
| 57 // No filter, just accept | |
| 58 return nsIDOMNodeFilter::FILTER_ACCEPT; | |
| 59 } | |
| 60 | |
| 61 if (mFilter.HasWebIDLCallback()) { | |
| 62 AutoRestore<bool> inAcceptNode(mInAcceptNode); | |
| 63 mInAcceptNode = true; | |
| 64 return mFilter.GetWebIDLCallback()-> | |
| 65 AcceptNode(*aNode, aResult, CallbackObject::eRethrowExceptions); | |
| 66 } | |
| 67 | |
| 68 nsCOMPtr<nsIDOMNode> domNode = do_QueryInterface(aNode); | |
| 69 AutoRestore<bool> inAcceptNode(mInAcceptNode); | |
| 70 mInAcceptNode = true; | |
| 71 int16_t filtered; | |
| 72 nsresult rv = mFilter.GetXPCOMCallback()->AcceptNode(domNode, &filtered); | |
| 73 if (NS_FAILED(rv)) { | |
| 74 aResult.Throw(rv); | |
| 75 } | |
| 76 return filtered; | |
| 77 } |
