The Tor Browser / file comparison
comparison: content/base/src/NodeIterator.h
content/base/src/NodeIterator.h
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:3a147035bc0d |
|---|---|
| 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 /* | |
| 8 * Implementation of DOM Traversal's nsIDOMNodeIterator | |
| 9 */ | |
| 10 | |
| 11 #ifndef mozilla_dom_NodeIterator_h | |
| 12 #define mozilla_dom_NodeIterator_h | |
| 13 | |
| 14 #include "nsIDOMNodeIterator.h" | |
| 15 #include "nsTraversal.h" | |
| 16 #include "nsCycleCollectionParticipant.h" | |
| 17 #include "nsStubMutationObserver.h" | |
| 18 | |
| 19 class nsINode; | |
| 20 class nsIDOMNode; | |
| 21 | |
| 22 namespace mozilla { | |
| 23 namespace dom { | |
| 24 | |
| 25 class NodeIterator MOZ_FINAL : public nsIDOMNodeIterator, | |
| 26 public nsTraversal, | |
| 27 public nsStubMutationObserver | |
| 28 { | |
| 29 public: | |
| 30 NS_DECL_CYCLE_COLLECTING_ISUPPORTS | |
| 31 NS_DECL_NSIDOMNODEITERATOR | |
| 32 | |
| 33 NodeIterator(nsINode *aRoot, | |
| 34 uint32_t aWhatToShow, | |
| 35 const NodeFilterHolder &aFilter); | |
| 36 virtual ~NodeIterator(); | |
| 37 | |
| 38 NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED | |
| 39 | |
| 40 NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(NodeIterator, nsIDOMNodeIterator) | |
| 41 | |
| 42 // WebIDL API | |
| 43 nsINode* Root() const | |
| 44 { | |
| 45 return mRoot; | |
| 46 } | |
| 47 nsINode* GetReferenceNode() const | |
| 48 { | |
| 49 return mPointer.mNode; | |
| 50 } | |
| 51 bool PointerBeforeReferenceNode() const | |
| 52 { | |
| 53 return mPointer.mBeforeNode; | |
| 54 } | |
| 55 uint32_t WhatToShow() const | |
| 56 { | |
| 57 return mWhatToShow; | |
| 58 } | |
| 59 already_AddRefed<NodeFilter> GetFilter() | |
| 60 { | |
| 61 return mFilter.ToWebIDLCallback(); | |
| 62 } | |
| 63 already_AddRefed<nsINode> NextNode(ErrorResult& aResult) | |
| 64 { | |
| 65 return NextOrPrevNode(&NodePointer::MoveToNext, aResult); | |
| 66 } | |
| 67 already_AddRefed<nsINode> PreviousNode(ErrorResult& aResult) | |
| 68 { | |
| 69 return NextOrPrevNode(&NodePointer::MoveToPrevious, aResult); | |
| 70 } | |
| 71 // The XPCOM Detach() is fine for our purposes | |
| 72 | |
| 73 JSObject* WrapObject(JSContext *cx); | |
| 74 | |
| 75 private: | |
| 76 struct NodePointer { | |
| 77 NodePointer() : mNode(nullptr) {} | |
| 78 NodePointer(nsINode *aNode, bool aBeforeNode); | |
| 79 | |
| 80 typedef bool (NodePointer::*MoveToMethodType)(nsINode*); | |
| 81 bool MoveToNext(nsINode *aRoot); | |
| 82 bool MoveToPrevious(nsINode *aRoot); | |
| 83 | |
| 84 bool MoveForward(nsINode *aRoot, nsINode *aNode); | |
| 85 void MoveBackward(nsINode *aParent, nsINode *aNode); | |
| 86 | |
| 87 void AdjustAfterRemoval(nsINode *aRoot, nsINode *aContainer, nsIContent *aChild, nsIContent *aPreviousSibling); | |
| 88 | |
| 89 void Clear() { mNode = nullptr; } | |
| 90 | |
| 91 nsINode *mNode; | |
| 92 bool mBeforeNode; | |
| 93 }; | |
| 94 | |
| 95 // Implementation for some of our XPCOM getters | |
| 96 typedef already_AddRefed<nsINode> (NodeIterator::*NodeGetter)(ErrorResult&); | |
| 97 inline nsresult ImplNodeGetter(NodeGetter aGetter, nsIDOMNode** aRetval) | |
| 98 { | |
| 99 mozilla::ErrorResult rv; | |
| 100 nsCOMPtr<nsINode> node = (this->*aGetter)(rv); | |
| 101 if (rv.Failed()) { | |
| 102 return rv.ErrorCode(); | |
| 103 } | |
| 104 *aRetval = node ? node.forget().take()->AsDOMNode() : nullptr; | |
| 105 return NS_OK; | |
| 106 } | |
| 107 | |
| 108 // Have to return a strong ref, because the act of testing the node can | |
| 109 // remove it from the DOM so we're holding the only ref to it. | |
| 110 already_AddRefed<nsINode> | |
| 111 NextOrPrevNode(NodePointer::MoveToMethodType aMove, ErrorResult& aResult); | |
| 112 | |
| 113 NodePointer mPointer; | |
| 114 NodePointer mWorkingPointer; | |
| 115 }; | |
| 116 | |
| 117 } // namespace dom | |
| 118 } // namespace mozilla | |
| 119 | |
| 120 #endif // mozilla_dom_NodeIterator_h |
