1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/. */
10 #include "mozilla/DoublyLinkedList.h"
11 #include "mozilla/Likely.h"
12 #include "mozilla/UniquePtr.h"
13 #include "nsCOMPtr.h" // for member, local
14 #include "nsGkAtoms.h" // for nsGkAtoms::baseURIProperty
15 #include "mozilla/dom/NodeInfo.h" // member (in nsCOMPtr)
16 #include "nsIWeakReference.h"
17 #include "nsIMutationObserver.h"
18 #include "nsNodeInfoManager.h" // for use in NodePrincipal()
19 #include "nsPropertyTable.h" // for typedefs
20 #include "mozilla/ErrorResult.h"
21 #include "mozilla/LinkedList.h"
22 #include "mozilla/MemoryReporting.h"
23 #include "mozilla/dom/EventTarget.h" // for base class
24 #include "js/TypeDecls.h" // for Handle, Value, JSObject, JSContext
25 #include "mozilla/dom/DOMString.h"
26 #include "mozilla/dom/BindingDeclarations.h"
27 #include "mozilla/dom/NodeBinding.h"
28 #include "nsTHashtable.h"
31 // Including 'windows.h' will #define GetClassInfo to something else.
39 class nsAttrChildContentList
;
42 class nsDOMAttributeMap
;
43 class nsGenericHTMLElement
;
44 class nsIAnimationObserver
;
46 class nsIContentSecurityPolicy
;
48 class nsIHTMLCollection
;
49 class nsMultiMutationObserver
;
54 class nsNodeSupportsWeakRefTearoff
;
55 class nsDOMMutationObserver
;
60 class EventListenerManager
;
61 struct StyleSelectorList
;
68 * @return true if aChar is what the WHATWG defines as a 'ascii whitespace'.
69 * https://infra.spec.whatwg.org/#ascii-whitespace
71 inline bool IsSpaceCharacter(char16_t aChar
) {
72 return aChar
== ' ' || aChar
== '\t' || aChar
== '\n' || aChar
== '\r' ||
75 inline bool IsSpaceCharacter(char aChar
) {
76 return aChar
== ' ' || aChar
== '\t' || aChar
== '\n' || aChar
== '\r' ||
82 class AncestorsOfTypeIterator
;
83 struct BoxQuadOptions
;
84 struct ConvertCoordinateOptions
;
87 class DocumentFragment
;
88 class DocumentOrShadowRoot
;
91 class DOMRectReadOnly
;
93 class EventHandlerNonNull
;
95 class FlatTreeAncestorsOfTypeIterator
;
97 class InclusiveAncestorsOfTypeIterator
;
99 class InclusiveFlatTreeAncestorsOfTypeIterator
;
101 class MutationObservers
;
102 template <typename T
>
104 class OwningNodeOrString
;
110 class TextOrElementOrDocument
;
112 struct GetRootNodeOptions
;
113 enum class CallerType
: uint32_t;
115 } // namespace mozilla
117 #define NODE_FLAG_BIT(n_) \
118 (nsWrapperCache::FlagsType(1U) << (WRAPPER_CACHE_FLAGS_BITS_USED + (n_)))
121 // This bit will be set if the node has a listener manager.
122 NODE_HAS_LISTENERMANAGER
= NODE_FLAG_BIT(0),
124 // Whether this node has had any properties set on it
125 NODE_HAS_PROPERTIES
= NODE_FLAG_BIT(1),
127 // Whether the node has some ancestor, possibly itself, that is native
128 // anonymous. This includes ancestors crossing XBL scopes, in cases when an
129 // XBL binding is attached to an element which has a native anonymous
130 // ancestor. This flag is set-once: once a node has it, it must not be
132 // NOTE: Should only be used on nsIContent nodes
133 NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE
= NODE_FLAG_BIT(2),
135 // Whether this node is the root of a native anonymous (from the perspective
136 // of its parent) subtree. This flag is set-once: once a node has it, it
137 // must not be removed.
138 // NOTE: Should only be used on nsIContent nodes
139 NODE_IS_NATIVE_ANONYMOUS_ROOT
= NODE_FLAG_BIT(3),
141 NODE_IS_EDITABLE
= NODE_FLAG_BIT(4),
143 // Whether the node participates in a shadow tree.
144 NODE_IS_IN_SHADOW_TREE
= NODE_FLAG_BIT(5),
146 // This node needs to go through frame construction to get a frame (or
147 // undisplayed entry).
148 NODE_NEEDS_FRAME
= NODE_FLAG_BIT(6),
150 // At least one descendant in the flattened tree has NODE_NEEDS_FRAME set.
151 // This should be set on every node on the flattened tree path between the
152 // node(s) with NODE_NEEDS_FRAME and the root content.
153 NODE_DESCENDANTS_NEED_FRAMES
= NODE_FLAG_BIT(7),
155 // Set if the node has the accesskey attribute set.
156 NODE_HAS_ACCESSKEY
= NODE_FLAG_BIT(8),
158 NODE_HAS_BEEN_IN_UA_WIDGET
= NODE_FLAG_BIT(9),
160 // Set if the node has a nonce value and a header delivered CSP.
161 NODE_HAS_NONCE_AND_HEADER_CSP
= NODE_FLAG_BIT(10),
163 NODE_KEEPS_DOMARENA
= NODE_FLAG_BIT(11),
165 NODE_MAY_HAVE_ELEMENT_CHILDREN
= NODE_FLAG_BIT(12),
167 // Remaining bits are node type specific.
168 NODE_TYPE_SPECIFIC_BITS_OFFSET
= 13
171 // Flags for selectors that persist to the DOM node.
172 enum class NodeSelectorFlags
: uint32_t {
173 // Node has an :empty or :-moz-only-whitespace selector
174 HasEmptySelector
= 1 << 0,
176 /// A child of the node has a selector such that any insertion,
177 /// removal, or appending of children requires restyling the parent, if the
178 /// parent is an element. If the parent is the shadow root, the child's
179 /// siblings are restyled.
180 HasSlowSelector
= 1 << 1,
182 /// A child of the node has a :first-child, :-moz-first-node,
183 /// :only-child, :last-child or :-moz-last-node selector.
184 HasEdgeChildSelector
= 1 << 2,
186 /// A child of the node has a selector such that any insertion or
187 /// removal of children requires restyling later siblings of that
188 /// element. Additionally (in this manner it is stronger than
189 /// NODE_HAS_SLOW_SELECTOR), if a child's style changes due to any
190 /// other content tree changes (e.g., the child changes to or from
191 /// matching :empty due to a grandchild insertion or removal), the
192 /// child's later siblings must also be restyled.
193 HasSlowSelectorLaterSiblings
= 1 << 3,
195 /// A child of this node might be matched by :nth-child(.. of <selector>) or
196 /// :nth-last-child(.. of <selector>). If a DOM mutation may have caused the
197 /// selector to either match or no longer match that child, the child's
198 /// siblings are restyled.
199 HasSlowSelectorNthOf
= 1 << 4,
201 /// Set of selector flags that may trigger a restyle on DOM append, with
202 /// restyle on siblings or a single parent (And perhaps their subtrees).
203 AllSimpleRestyleFlagsForAppend
= HasEmptySelector
| HasSlowSelector
|
204 HasEdgeChildSelector
| HasSlowSelectorNthOf
,
206 /// Set of selector flags that may trigger a restyle as a result of any
208 AllSimpleRestyleFlags
=
209 AllSimpleRestyleFlagsForAppend
| HasSlowSelectorLaterSiblings
,
211 // This node was evaluated as an anchor for a relative selector.
212 RelativeSelectorAnchor
= 1 << 5,
214 // This node was evaluated as an anchor for a relative selector, and that
215 // relative selector was not the subject of the overall selector.
216 RelativeSelectorAnchorNonSubject
= 1 << 6,
218 // This node's sibling(s) performed a relative selector search to this node.
219 RelativeSelectorSearchDirectionSibling
= 1 << 7,
221 // This node's ancestor(s) performed a relative selector search to this node.
222 RelativeSelectorSearchDirectionAncestor
= 1 << 8,
224 // This node's sibling(s) and ancestor(s), and/or this node's ancestor's
225 // sibling(s) performed a relative selector search to this node.
226 RelativeSelectorSearchDirectionAncestorSibling
=
227 RelativeSelectorSearchDirectionSibling
|
228 RelativeSelectorSearchDirectionAncestor
,
231 MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(NodeSelectorFlags
);
233 // Make sure we have space for our bits
234 #define ASSERT_NODE_FLAGS_SPACE(n) \
235 static_assert(WRAPPER_CACHE_FLAGS_BITS_USED + (n) <= \
236 sizeof(nsWrapperCache::FlagsType) * 8, \
237 "Not enough space for our bits")
238 ASSERT_NODE_FLAGS_SPACE(NODE_TYPE_SPECIFIC_BITS_OFFSET
);
241 * Class used to detect unexpected mutations. To use the class create an
242 * nsMutationGuard on the stack before unexpected mutations could occur.
243 * You can then at any time call Mutated to check if any unexpected mutations
246 class nsMutationGuard
{
248 nsMutationGuard() { mStartingGeneration
= sGeneration
; }
251 * Returns true if any unexpected mutations have occurred. You can pass in
252 * an 8-bit ignore count to ignore a number of expected mutations.
254 * We don't need to care about overflow because subtraction of uint64_t's is
255 * finding the difference between two elements of the group Z < 2^64. Once
256 * we know the difference between two elements we only need to check that is
257 * less than the given number of mutations to know less than that many
258 * mutations occured. Assuming constant 1ns mutations it would take 584
259 * years for sGeneration to fully wrap around so we can ignore a guard living
260 * through a full wrap around.
262 bool Mutated(uint8_t aIgnoreCount
) {
263 return (sGeneration
- mStartingGeneration
) > aIgnoreCount
;
266 // This function should be called whenever a mutation that we want to keep
267 // track of happen. For now this is only done when children are added or
268 // removed, but we might do it for attribute changes too in the future.
269 static void DidMutate() { sGeneration
++; }
272 // This is the value sGeneration had when the guard was constructed.
273 uint64_t mStartingGeneration
;
275 // This value is incremented on every mutation, for the life of the process.
276 static uint64_t sGeneration
;
280 * A class that implements nsIWeakReference
282 class nsNodeWeakReference final
: public nsIWeakReference
{
284 explicit nsNodeWeakReference(nsINode
* aNode
);
290 NS_DECL_NSIWEAKREFERENCE
292 void NoticeNodeDestruction() { mObject
= nullptr; }
295 ~nsNodeWeakReference();
298 // This should be used for any nsINode sub-class that has fields of its own
299 // that it needs to measure; any sub-class that doesn't use it will inherit
300 // AddSizeOfExcludingThis from its super-class. AddSizeOfIncludingThis() need
301 // not be defined, it is inherited from nsINode.
302 #define NS_DECL_ADDSIZEOFEXCLUDINGTHIS \
303 virtual void AddSizeOfExcludingThis(nsWindowSizes& aSizes, \
304 size_t* aNodeSize) const override;
306 // IID for the nsINode interface
307 // Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs
308 #define NS_INODE_IID \
310 0x70ba4547, 0x7699, 0x44fc, { \
311 0xb3, 0x20, 0x52, 0xdb, 0xe3, 0xd1, 0xf9, 0x0a \
316 * An internal interface that abstracts some DOMNode-related parts that both
317 * nsIContent and Document share. An instance of this interface has a list
318 * of nsIContent children and provides access to them.
320 class nsINode
: public mozilla::dom::EventTarget
{
321 #ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
322 void AssertInvariantsOnNodeInfoChange();
325 using BoxQuadOptions
= mozilla::dom::BoxQuadOptions
;
326 using ConvertCoordinateOptions
= mozilla::dom::ConvertCoordinateOptions
;
327 using DocGroup
= mozilla::dom::DocGroup
;
328 using Document
= mozilla::dom::Document
;
329 using DOMPoint
= mozilla::dom::DOMPoint
;
330 using DOMPointInit
= mozilla::dom::DOMPointInit
;
331 using DOMQuad
= mozilla::dom::DOMQuad
;
332 using DOMRectReadOnly
= mozilla::dom::DOMRectReadOnly
;
333 using OwningNodeOrString
= mozilla::dom::OwningNodeOrString
;
334 using TextOrElementOrDocument
= mozilla::dom::TextOrElementOrDocument
;
335 using CallerType
= mozilla::dom::CallerType
;
336 using ErrorResult
= mozilla::ErrorResult
;
338 // XXXbz Maybe we should codegen a class holding these constants and
339 // inherit from it...
340 static const auto ELEMENT_NODE
= mozilla::dom::Node_Binding::ELEMENT_NODE
;
341 static const auto ATTRIBUTE_NODE
= mozilla::dom::Node_Binding::ATTRIBUTE_NODE
;
342 static const auto TEXT_NODE
= mozilla::dom::Node_Binding::TEXT_NODE
;
343 static const auto CDATA_SECTION_NODE
=
344 mozilla::dom::Node_Binding::CDATA_SECTION_NODE
;
345 static const auto ENTITY_REFERENCE_NODE
=
346 mozilla::dom::Node_Binding::ENTITY_REFERENCE_NODE
;
347 static const auto ENTITY_NODE
= mozilla::dom::Node_Binding::ENTITY_NODE
;
348 static const auto PROCESSING_INSTRUCTION_NODE
=
349 mozilla::dom::Node_Binding::PROCESSING_INSTRUCTION_NODE
;
350 static const auto COMMENT_NODE
= mozilla::dom::Node_Binding::COMMENT_NODE
;
351 static const auto DOCUMENT_NODE
= mozilla::dom::Node_Binding::DOCUMENT_NODE
;
352 static const auto DOCUMENT_TYPE_NODE
=
353 mozilla::dom::Node_Binding::DOCUMENT_TYPE_NODE
;
354 static const auto DOCUMENT_FRAGMENT_NODE
=
355 mozilla::dom::Node_Binding::DOCUMENT_FRAGMENT_NODE
;
356 static const auto NOTATION_NODE
= mozilla::dom::Node_Binding::NOTATION_NODE
;
357 static const auto MAX_NODE_TYPE
= NOTATION_NODE
;
359 void* operator new(size_t aSize
, nsNodeInfoManager
* aManager
);
360 void* operator new(size_t aSize
) = delete;
361 void operator delete(void* aPtr
);
364 using Sequence
= mozilla::dom::Sequence
<T
>;
366 NS_DECLARE_STATIC_IID_ACCESSOR(NS_INODE_IID
)
368 // The |aNodeSize| outparam on this function is where the actual node size
369 // value is put. It gets added to the appropriate value within |aSizes| by
370 // AddSizeOfNodeTree().
372 // Among the sub-classes that inherit (directly or indirectly) from nsINode,
373 // measurement of the following members may be added later if DMD finds it is
375 // - nsGenericHTMLElement: mForm, mFieldSet
376 // - nsGenericHTMLFrameElement: mFrameLoader (bug 672539)
377 // - HTMLBodyElement: mContentStyleRule
378 // - HTMLDataListElement: mOptions
379 // - HTMLFieldSetElement: mElements, mDependentElements, mFirstLegend
380 // - HTMLFormElement: many!
381 // - HTMLFrameSetElement: mRowSpecs, mColSpecs
382 // - HTMLInputElement: mInputData, mFiles, mFileList, mStaticDocfileList
383 // - nsHTMLMapElement: mAreas
384 // - HTMLMediaElement: many!
385 // - nsHTMLOutputElement: mDefaultValue, mTokenList
386 // - nsHTMLRowElement: mCells
387 // - nsHTMLSelectElement: mOptions, mRestoreState
388 // - nsHTMLTableElement: mTBodies, mRows, mTableInheritedAttributes
389 // - nsHTMLTableSectionElement: mRows
390 // - nsHTMLTextAreaElement: mControllers, mState
392 // The following members don't need to be measured:
393 // - nsIContent: mPrimaryFrame, because it's non-owning and measured elsewhere
395 virtual void AddSizeOfExcludingThis(nsWindowSizes
& aSizes
,
396 size_t* aNodeSize
) const;
398 // SizeOfIncludingThis doesn't need to be overridden by sub-classes because
399 // sub-classes of nsINode are guaranteed to be laid out in memory in such a
400 // way that |this| points to the start of the allocated object, even in
401 // methods of nsINode's sub-classes, so aSizes.mState.mMallocSizeOf(this) is
402 // always safe to call no matter which object it was invoked on.
403 void AddSizeOfIncludingThis(nsWindowSizes
& aSizes
, size_t* aNodeSize
) const;
405 friend class nsNodeWeakReference
;
406 friend class nsNodeSupportsWeakRefTearoff
;
407 friend class AttrArray
;
409 #ifdef MOZILLA_INTERNAL_API
410 explicit nsINode(already_AddRefed
<mozilla::dom::NodeInfo
>&& aNodeInfo
);
415 bool IsContainerNode() const {
416 return IsElement() || IsDocument() || IsDocumentFragment();
420 * Returns true if the node is a HTMLTemplate element.
422 bool IsTemplateElement() const { return IsHTMLElement(nsGkAtoms::_template
); }
424 bool IsSlotable() const { return IsElement() || IsText(); }
427 * Returns true if this is a document node.
429 bool IsDocument() const {
430 // One less pointer-chase than checking NodeType().
431 return !GetParentNode() && IsInUncomposedDoc();
435 * Return this node as a document. Asserts IsDocument().
437 * This is defined inline in Document.h.
439 inline Document
* AsDocument();
440 inline const Document
* AsDocument() const;
443 * Returns true if this is a document fragment node.
445 bool IsDocumentFragment() const {
446 return NodeType() == DOCUMENT_FRAGMENT_NODE
;
449 virtual bool IsHTMLFormControlElement() const { return false; }
452 * https://dom.spec.whatwg.org/#concept-tree-inclusive-descendant
454 * @param aNode must not be nullptr.
456 bool IsInclusiveDescendantOf(const nsINode
* aNode
) const;
459 * https://dom.spec.whatwg.org/#concept-shadow-including-inclusive-descendant
461 * @param aNode must not be nullptr.
463 bool IsShadowIncludingInclusiveDescendantOf(const nsINode
* aNode
) const;
466 * Returns true if the given node is this node or one of its descendants
467 * in the "flat tree."
469 * @param aNode must not be nullptr.
471 bool IsInclusiveFlatTreeDescendantOf(const nsINode
* aNode
) const;
474 * Return this node as a document fragment. Asserts IsDocumentFragment().
476 * This is defined inline in DocumentFragment.h.
478 inline mozilla::dom::DocumentFragment
* AsDocumentFragment();
479 inline const mozilla::dom::DocumentFragment
* AsDocumentFragment() const;
481 JSObject
* WrapObject(JSContext
*, JS::Handle
<JSObject
*> aGivenProto
) final
;
484 * Hook for constructing JS::ubi::Concrete specializations for memory
485 * reporting. Specializations are defined in NodeUbiReporting.h.
487 virtual void ConstructUbiNode(void* storage
) = 0;
490 * returns true if we are in priviliged code or
491 * layout.css.getBoxQuads.enabled == true.
493 static bool HasBoxQuadsSupport(JSContext
* aCx
, JSObject
* /* unused */);
497 * WrapNode is called from WrapObject to actually wrap this node, WrapObject
498 * does some additional checks and fix-up that's common to all nodes. WrapNode
499 * should just call the DOM binding's Wrap function.
501 * aGivenProto is the prototype to use (or null if the default one should be
502 * used) and should just be passed directly on to the DOM binding's Wrap
505 virtual JSObject
* WrapNode(JSContext
* aCx
,
506 JS::Handle
<JSObject
*> aGivenProto
) = 0;
509 mozilla::dom::ParentObject
GetParentObject()
510 const; // Implemented in Document.h
513 * Returns the first child of a node or the first child of
514 * a template element's content if the provided node is a
517 nsIContent
* GetFirstChildOfTemplateOrNode();
520 * Return the scope chain parent for this node, for use in things
521 * like event handler compilation. Returning null means to use the
522 * global object as the scope chain parent.
524 virtual nsINode
* GetScopeChainParent() const;
526 MOZ_CAN_RUN_SCRIPT
mozilla::dom::Element
* GetParentFlexElement();
529 * Returns the nearest inclusive open popover for a given node, see
530 * https://html.spec.whatwg.org/multipage/popover.html#nearest-inclusive-open-popover
532 mozilla::dom::Element
* GetNearestInclusiveOpenPopover() const;
535 * https://html.spec.whatwg.org/multipage/popover.html#nearest-inclusive-target-popover-for-invoker
537 mozilla::dom::Element
* GetNearestInclusiveTargetPopoverForInvoker() const;
540 * https://html.spec.whatwg.org/multipage/popover.html#popover-target-element
542 nsGenericHTMLElement
* GetEffectivePopoverTargetElement() const;
545 * https://html.spec.whatwg.org/multipage/popover.html#topmost-clicked-popover
547 mozilla::dom::Element
* GetTopmostClickedPopover() const;
549 bool IsNode() const final
{ return true; }
551 NS_IMPL_FROMEVENTTARGET_HELPER(nsINode
, IsNode())
554 * Return whether the node is an Element node. Faster than using `NodeType()`.
556 bool IsElement() const { return GetBoolFlag(NodeIsElement
); }
558 virtual bool IsTextControlElement() const { return false; }
559 virtual bool IsGenericHTMLFormControlElementWithState() const {
563 // Returns non-null if this element subclasses `LinkStyle`.
564 virtual const mozilla::dom::LinkStyle
* AsLinkStyle() const { return nullptr; }
565 mozilla::dom::LinkStyle
* AsLinkStyle() {
566 return const_cast<mozilla::dom::LinkStyle
*>(
567 static_cast<const nsINode
*>(this)->AsLinkStyle());
571 * Return this node as an Element. Should only be used for nodes
572 * for which IsElement() is true. This is defined inline in Element.h.
574 inline mozilla::dom::Element
* AsElement();
575 inline const mozilla::dom::Element
* AsElement() const;
578 * Return whether the node is an nsStyledElement instance or not.
580 virtual bool IsStyledElement() const { return false; }
583 * Return this node as nsIContent. Should only be used for nodes for which
584 * IsContent() is true.
586 * The assertion in nsIContent's constructor makes this safe.
588 nsIContent
* AsContent() {
589 MOZ_ASSERT(IsContent());
590 return reinterpret_cast<nsIContent
*>(this);
592 const nsIContent
* AsContent() const {
593 MOZ_ASSERT(IsContent());
594 return reinterpret_cast<const nsIContent
*>(this);
598 * Return whether the node is a Text node (which might be an actual
599 * textnode, or might be a CDATA section).
601 bool IsText() const {
602 uint32_t nodeType
= NodeType();
603 return nodeType
== TEXT_NODE
|| nodeType
== CDATA_SECTION_NODE
;
607 * Return this node as Text if it is one, otherwise null. This is defined
610 inline mozilla::dom::Text
* GetAsText();
611 inline const mozilla::dom::Text
* GetAsText() const;
614 * Return this node as Text. Asserts IsText(). This is defined inline in
617 inline mozilla::dom::Text
* AsText();
618 inline const mozilla::dom::Text
* AsText() const;
621 * Return whether the node is a ProcessingInstruction node.
623 bool IsProcessingInstruction() const {
624 return NodeType() == PROCESSING_INSTRUCTION_NODE
;
628 * Return whether the node is a CharacterData node (text, cdata,
629 * comment, processing instruction)
631 bool IsCharacterData() const {
632 uint32_t nodeType
= NodeType();
633 return nodeType
== TEXT_NODE
|| nodeType
== CDATA_SECTION_NODE
||
634 nodeType
== PROCESSING_INSTRUCTION_NODE
|| nodeType
== COMMENT_NODE
;
638 * Return whether the node is a Comment node.
640 bool IsComment() const { return NodeType() == COMMENT_NODE
; }
643 * Return whether the node is an Attr node.
645 bool IsAttr() const { return NodeType() == ATTRIBUTE_NODE
; }
648 * Return if this node has any children.
650 bool HasChildren() const { return !!mFirstChild
; }
653 * Get the number of children
654 * @return the number of children
656 uint32_t GetChildCount() const { return mChildCount
; }
659 * NOTE: this function is going to be removed soon (hopefully!) Don't use it
662 * Get a child by index
663 * @param aIndex the index of the child to get
664 * @return the child, or null if index out of bounds
666 nsIContent
* GetChildAt_Deprecated(uint32_t aIndex
) const;
669 * Get the index of a child within this content.
671 * @param aPossibleChild the child to get the index of.
672 * @return the index of the child, or Nothing if not a child. Be aware that
673 * anonymous children (e.g. a <div> child of an <input> element) will
676 * If the return value is Some, then calling GetChildAt_Deprecated() with
677 * that value will return aPossibleChild.
679 mozilla::Maybe
<uint32_t> ComputeIndexOf(const nsINode
* aPossibleChild
) const;
682 * Get the index of this within parent node (ComputeIndexInParentNode) or
683 * parent content (nsIContent) node (ComputeIndexInParentContent).
685 * @return the index of this node in the parent, or Nothing there is no
686 * parent (content) node or the parent does not have this node anymore
687 * (e.g., being removed from the parent). Be aware that anonymous
688 * children (e.g. a <div> child of an <input> element) will result in
691 * If the return value is Some, then calling GetChildAt_Deprecated() with
692 * that value will return this.
694 mozilla::Maybe
<uint32_t> ComputeIndexInParentNode() const;
695 mozilla::Maybe
<uint32_t> ComputeIndexInParentContent() const;
698 * Get the index of a child within this content.
700 * @param aPossibleChild the child to get the index of.
701 * @return the index of the child, or -1 if not a child. Be aware that
702 * anonymous children (e.g. a <div> child of an <input> element) will
705 * If the return value is not -1, then calling GetChildAt_Deprecated() with
706 * that value will return aPossibleChild.
708 int32_t ComputeIndexOf_Deprecated(const nsINode
* aPossibleChild
) const;
711 * Returns the "node document" of this node.
713 * https://dom.spec.whatwg.org/#concept-node-document
715 * Note that in the case that this node is a document node this method
716 * will return |this|. That is different to the Node.ownerDocument DOM
717 * attribute (implemented by nsINode::GetOwnerDocument) which is specified to
718 * be null in that case:
720 * https://dom.spec.whatwg.org/#dom-node-ownerdocument
722 * For all other cases OwnerDoc and GetOwnerDocument behave identically.
724 Document
* OwnerDoc() const MOZ_NONNULL_RETURN
{
725 return mNodeInfo
->GetDocument();
729 * Return the "owner document" of this node as an nsINode*. Implemented
732 inline nsINode
* OwnerDocAsNode() const MOZ_NONNULL_RETURN
;
735 * Returns true if the content has an ancestor that is a document.
737 * @return whether this content is in a document tree
739 bool IsInUncomposedDoc() const { return GetBoolFlag(IsInDocument
); }
742 * Get the document that this content is currently in, if any. This will be
743 * null if the content has no ancestor that is a document.
745 * @return the current document
748 Document
* GetUncomposedDoc() const {
749 return IsInUncomposedDoc() ? OwnerDoc() : nullptr;
753 * Returns true if we're connected, and thus GetComposedDoc() would return a
756 bool IsInComposedDoc() const { return GetBoolFlag(IsConnected
); }
759 * This method returns the owner document if the node is connected to it
760 * (as defined in the DOM spec), otherwise it returns null.
761 * In other words, returns non-null even in the case the node is in
762 * Shadow DOM, if there is a possibly shadow boundary crossing path from
763 * the node to its owner document.
765 Document
* GetComposedDoc() const {
766 return IsInComposedDoc() ? OwnerDoc() : nullptr;
770 * Returns OwnerDoc() if the node is in uncomposed document and ShadowRoot if
771 * the node is in Shadow DOM.
773 mozilla::dom::DocumentOrShadowRoot
* GetContainingDocumentOrShadowRoot() const;
776 * Returns OwnerDoc() if the node is in uncomposed document and ShadowRoot if
777 * the node is in Shadow DOM and is in composed document.
779 mozilla::dom::DocumentOrShadowRoot
* GetUncomposedDocOrConnectedShadowRoot()
783 * To be called when reference count of the node drops to zero.
788 * The values returned by this function are the ones defined for
791 uint16_t NodeType() const { return mNodeInfo
->NodeType(); }
792 const nsString
& NodeName() const { return mNodeInfo
->NodeName(); }
793 const nsString
& LocalName() const { return mNodeInfo
->LocalName(); }
796 * Get the NodeInfo for this element
797 * @return the nodes node info
799 inline mozilla::dom::NodeInfo
* NodeInfo() const { return mNodeInfo
; }
802 * Called when we have been adopted, and the information of the
803 * node has been changed.
805 * The new document can be reached via OwnerDoc().
807 * If you override this method,
808 * please call up to the parent NodeInfoChanged.
810 * If you change this, change also the similar method in Link.
812 virtual void NodeInfoChanged(Document
* aOldDoc
) {
813 #ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
814 AssertInvariantsOnNodeInfoChange();
818 inline bool IsInNamespace(int32_t aNamespace
) const {
819 return mNodeInfo
->NamespaceID() == aNamespace
;
823 * Returns the DocGroup of the "node document" of this node.
825 DocGroup
* GetDocGroup() const;
828 * Print a debugger friendly descriptor of this element. This will describe
829 * the position of this element in the document.
831 friend std::ostream
& operator<<(std::ostream
& aStream
, const nsINode
& aNode
);
834 // These 2 methods are useful for the recursive templates IsHTMLElement,
835 // IsSVGElement, etc.
836 inline bool IsNodeInternal() const { return false; }
838 template <typename First
, typename
... Args
>
839 inline bool IsNodeInternal(First aFirst
, Args
... aArgs
) const {
840 return mNodeInfo
->Equals(aFirst
) || IsNodeInternal(aArgs
...);
844 inline bool IsHTMLElement() const {
845 return IsElement() && IsInNamespace(kNameSpaceID_XHTML
);
848 inline bool IsHTMLElement(const nsAtom
* aTag
) const {
849 return IsElement() && mNodeInfo
->Equals(aTag
, kNameSpaceID_XHTML
);
852 template <typename First
, typename
... Args
>
853 inline bool IsAnyOfHTMLElements(First aFirst
, Args
... aArgs
) const {
854 return IsHTMLElement() && IsNodeInternal(aFirst
, aArgs
...);
857 inline bool IsSVGElement() const {
858 return IsElement() && IsInNamespace(kNameSpaceID_SVG
);
861 inline bool IsSVGElement(const nsAtom
* aTag
) const {
862 return IsElement() && mNodeInfo
->Equals(aTag
, kNameSpaceID_SVG
);
865 template <typename First
, typename
... Args
>
866 inline bool IsAnyOfSVGElements(First aFirst
, Args
... aArgs
) const {
867 return IsSVGElement() && IsNodeInternal(aFirst
, aArgs
...);
870 virtual bool IsSVGAnimationElement() const { return false; }
871 virtual bool IsSVGComponentTransferFunctionElement() const { return false; }
872 virtual bool IsSVGFilterPrimitiveElement() const { return false; }
873 virtual bool IsSVGFilterPrimitiveChildElement() const { return false; }
874 virtual bool IsSVGGeometryElement() const { return false; }
875 virtual bool IsSVGGraphicsElement() const { return false; }
877 inline bool IsXULElement() const {
878 return IsElement() && IsInNamespace(kNameSpaceID_XUL
);
881 inline bool IsXULElement(const nsAtom
* aTag
) const {
882 return IsElement() && mNodeInfo
->Equals(aTag
, kNameSpaceID_XUL
);
885 template <typename First
, typename
... Args
>
886 inline bool IsAnyOfXULElements(First aFirst
, Args
... aArgs
) const {
887 return IsXULElement() && IsNodeInternal(aFirst
, aArgs
...);
890 inline bool IsMathMLElement() const {
891 return IsElement() && IsInNamespace(kNameSpaceID_MathML
);
894 inline bool IsMathMLElement(const nsAtom
* aTag
) const {
895 return IsElement() && mNodeInfo
->Equals(aTag
, kNameSpaceID_MathML
);
898 template <typename First
, typename
... Args
>
899 inline bool IsAnyOfMathMLElements(First aFirst
, Args
... aArgs
) const {
900 return IsMathMLElement() && IsNodeInternal(aFirst
, aArgs
...);
903 bool IsShadowRoot() const {
904 const bool isShadowRoot
= IsInShadowTree() && !GetParentNode();
905 MOZ_ASSERT_IF(isShadowRoot
, IsDocumentFragment());
909 bool IsHTMLHeadingElement() const {
910 return IsAnyOfHTMLElements(nsGkAtoms::h1
, nsGkAtoms::h2
, nsGkAtoms::h3
,
911 nsGkAtoms::h4
, nsGkAtoms::h5
, nsGkAtoms::h6
);
915 * Check whether the conditional processing attributes other than
916 * systemLanguage "return true" if they apply to and are specified
917 * on the given SVG element. Returns true if this element should be
918 * rendered, false if it should not.
920 virtual bool PassesConditionalProcessingTests() const { return true; }
923 * Insert a content node before another or at the end.
924 * This method handles calling BindToTree on the child appropriately.
926 * @param aKid the content to insert
927 * @param aBeforeThis an existing node. Use nullptr if you want to
928 * add aKid at the end.
929 * @param aNotify whether to notify the document (current document for
930 * nsIContent, and |this| for Document) that the insert has occurred
931 * @param aRv The error, if any.
932 * Throw NS_ERROR_DOM_HIERARCHY_REQUEST_ERR if one attempts to have
933 * more than one element node as a child of a document. Doing this
934 * will also assert -- you shouldn't be doing it! Check with
935 * Document::GetRootElement() first if you're not sure. Apart from
936 * this one constraint, this doesn't do any checking on whether aKid is
937 * a valid child of |this|.
938 * Throw NS_ERROR_OUT_OF_MEMORY in some cases (from BindToTree).
940 virtual void InsertChildBefore(nsIContent
* aKid
, nsIContent
* aBeforeThis
,
941 bool aNotify
, mozilla::ErrorResult
& aRv
);
944 * Append a content node to the end of the child list. This method handles
945 * calling BindToTree on the child appropriately.
947 * @param aKid the content to append
948 * @param aNotify whether to notify the document (current document for
949 * nsIContent, and |this| for Document) that the append has occurred
950 * @param aRv The error, if any.
951 * Throw NS_ERROR_DOM_HIERARCHY_REQUEST_ERR if one attempts to have
952 * more than one element node as a child of a document. Doing this
953 * will also assert -- you shouldn't be doing it! Check with
954 * Document::GetRootElement() first if you're not sure. Apart from
955 * this one constraint, this doesn't do any checking on whether aKid is
956 * a valid child of |this|.
957 * Throw NS_ERROR_OUT_OF_MEMORY in some cases (from BindToTree).
959 void AppendChildTo(nsIContent
* aKid
, bool aNotify
,
960 mozilla::ErrorResult
& aRv
) {
961 InsertChildBefore(aKid
, nullptr, aNotify
, aRv
);
965 * Remove a child from this node. This method handles calling UnbindFromTree
966 * on the child appropriately.
968 * @param aKid the content to remove
969 * @param aNotify whether to notify the document (current document for
970 * nsIContent, and |this| for Document) that the remove has occurred
972 virtual void RemoveChildNode(nsIContent
* aKid
, bool aNotify
);
975 * Get a property associated with this node.
977 * @param aPropertyName name of property to get.
978 * @param aStatus out parameter for storing resulting status.
979 * Set to NS_PROPTABLE_PROP_NOT_THERE if the property
981 * @return the property. Null if the property is not set
982 * (though a null return value does not imply the
983 * property was not set, i.e. it can be set to null).
985 void* GetProperty(const nsAtom
* aPropertyName
,
986 nsresult
* aStatus
= nullptr) const;
989 * Set a property to be associated with this node. This will overwrite an
990 * existing value if one exists. The existing value is destroyed using the
991 * destructor function given when that value was set.
993 * @param aPropertyName name of property to set.
994 * @param aValue new value of property.
995 * @param aDtor destructor function to be used when this property
997 * @param aTransfer if true the property will not be deleted when the
998 * ownerDocument of the node changes, if false it
1001 * @return NS_PROPTABLE_PROP_OVERWRITTEN (success value) if the property
1003 * @throws NS_ERROR_OUT_OF_MEMORY if that occurs
1005 nsresult
SetProperty(nsAtom
* aPropertyName
, void* aValue
,
1006 NSPropertyDtorFunc aDtor
= nullptr,
1007 bool aTransfer
= false);
1010 * A generic destructor for property values allocated with new.
1013 static void DeleteProperty(void*, nsAtom
*, void* aPropertyValue
, void*) {
1014 delete static_cast<T
*>(aPropertyValue
);
1018 * Removes a property associated with this node. The value is destroyed using
1019 * the destruction function given when that value was set.
1021 * @param aPropertyName name of property to destroy.
1023 void RemoveProperty(const nsAtom
* aPropertyName
);
1026 * Take a property associated with this node. The value will not be destroyed
1027 * but rather returned. It is the caller's responsibility to destroy the value
1030 * @param aPropertyName name of property to unset.
1031 * @param aStatus out parameter for storing resulting status.
1032 * Set to NS_PROPTABLE_PROP_NOT_THERE if the property
1034 * @return the property. Null if the property is not set
1035 * (though a null return value does not imply the
1036 * property was not set, i.e. it can be set to null).
1038 void* TakeProperty(const nsAtom
* aPropertyName
, nsresult
* aStatus
= nullptr);
1040 bool HasProperties() const { return HasFlag(NODE_HAS_PROPERTIES
); }
1043 * Return the principal of this node. This is guaranteed to never be a null
1046 nsIPrincipal
* NodePrincipal() const {
1047 return mNodeInfo
->NodeInfoManager()->DocumentPrincipal();
1051 * Return the CSP of this node's document, if any.
1053 nsIContentSecurityPolicy
* GetCsp() const;
1056 * Get the parent nsIContent for this node.
1057 * @return the parent, or null if no parent or the parent is not an nsIContent
1059 nsIContent
* GetParent() const {
1060 return MOZ_LIKELY(GetBoolFlag(ParentIsContent
)) ? mParent
->AsContent()
1065 * Get the parent nsINode for this node. This can be either an nsIContent, a
1066 * Document or an Attr.
1067 * @return the parent node
1069 nsINode
* GetParentNode() const { return mParent
; }
1072 nsIContent
* DoGetShadowHost() const;
1075 nsINode
* GetParentOrShadowHostNode() const {
1076 if (MOZ_LIKELY(mParent
)) {
1079 // We could put this in nsIContentInlines.h or such to avoid this
1080 // reinterpret_cast, but it doesn't seem worth it.
1081 return IsInShadowTree() ? reinterpret_cast<nsINode
*>(DoGetShadowHost())
1085 enum FlattenedParentType
{ eNotForStyle
, eForStyle
};
1088 * Returns the node that is the parent of this node in the flattened
1089 * tree. This differs from the normal parent if the node is filtered
1090 * into an insertion point, or if the node is a direct child of a
1093 * @return the flattened tree parent
1095 inline nsINode
* GetFlattenedTreeParentNode() const;
1097 nsINode
* GetFlattenedTreeParentNodeNonInline() const;
1100 * Like GetFlattenedTreeParentNode, but returns the document for any native
1101 * anonymous content that was generated for ancestor frames of the document
1102 * element's primary frame, such as scrollbar elements created by the root
1105 inline nsINode
* GetFlattenedTreeParentNodeForStyle() const;
1107 inline mozilla::dom::Element
* GetFlattenedTreeParentElement() const;
1108 inline mozilla::dom::Element
* GetFlattenedTreeParentElementForStyle() const;
1111 * Get the parent nsINode for this node if it is an Element.
1113 * Defined inline in Element.h
1115 * @return the parent node
1117 inline mozilla::dom::Element
* GetParentElement() const;
1120 * Get the parent Element of this node, traversing over a ShadowRoot
1121 * to its host if necessary.
1123 mozilla::dom::Element
* GetParentElementCrossingShadowRoot() const;
1126 * Get closest element node for the node. Meaning that if the node is an
1127 * element node, returns itself. Otherwise, returns parent element or null.
1129 inline mozilla::dom::Element
* GetAsElementOrParentElement() const;
1132 * Get the root of the subtree this node belongs to. This never returns
1133 * null. It may return 'this' (e.g. for document nodes, and nodes that
1134 * are the roots of disconnected subtrees).
1136 nsINode
* SubtreeRoot() const;
1139 * Get context object's shadow-including root if options's composed is true,
1140 * and context object's root otherwise.
1142 nsINode
* GetRootNode(const mozilla::dom::GetRootNodeOptions
& aOptions
);
1144 virtual mozilla::EventListenerManager
* GetExistingListenerManager()
1146 virtual mozilla::EventListenerManager
* GetOrCreateListenerManager() override
;
1148 mozilla::Maybe
<mozilla::dom::EventCallbackDebuggerNotificationType
>
1149 GetDebuggerNotificationType() const override
;
1151 bool ComputeDefaultWantsUntrusted(mozilla::ErrorResult
& aRv
) final
;
1153 virtual bool IsApzAware() const override
;
1155 virtual nsPIDOMWindowOuter
* GetOwnerGlobalForBindingsInternal() override
;
1156 virtual nsIGlobalObject
* GetOwnerGlobal() const override
;
1158 using mozilla::dom::EventTarget::DispatchEvent
;
1159 // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
1160 MOZ_CAN_RUN_SCRIPT_BOUNDARY
bool DispatchEvent(
1161 mozilla::dom::Event
& aEvent
, mozilla::dom::CallerType aCallerType
,
1162 mozilla::ErrorResult
& aRv
) override
;
1165 nsresult
PostHandleEvent(mozilla::EventChainPostVisitor
& aVisitor
) override
;
1168 * Adds a mutation observer to be notified when this node, or any of its
1169 * descendants, are modified. The node will hold a weak reference to the
1170 * observer, which means that it is the responsibility of the observer to
1171 * remove itself in case it dies before the node. If an observer is added
1172 * while observers are being notified, it may also be notified. In general,
1173 * adding observers while inside a notification is not a good idea. An
1174 * observer that is already observing the node must not be added without
1175 * being removed first.
1177 * For mutation observers that implement nsIAnimationObserver, use
1178 * AddAnimationObserver instead.
1180 void AddMutationObserver(nsIMutationObserver
* aMutationObserver
) {
1181 nsSlots
* s
= Slots();
1182 if (aMutationObserver
) {
1183 NS_ASSERTION(!s
->mMutationObservers
.contains(aMutationObserver
),
1184 "Observer already in the list");
1186 s
->mMutationObservers
.pushBack(aMutationObserver
);
1190 void AddMutationObserver(nsMultiMutationObserver
* aMultiMutationObserver
);
1193 * Same as above, but only adds the observer if its not observing
1196 * For mutation observers that implement nsIAnimationObserver, use
1197 * AddAnimationObserverUnlessExists instead.
1199 void AddMutationObserverUnlessExists(nsIMutationObserver
* aMutationObserver
) {
1200 nsSlots
* s
= Slots();
1201 if (aMutationObserver
&&
1202 !s
->mMutationObservers
.contains(aMutationObserver
)) {
1203 s
->mMutationObservers
.pushBack(aMutationObserver
);
1207 void AddMutationObserverUnlessExists(
1208 nsMultiMutationObserver
* aMultiMutationObserver
);
1210 * Same as AddMutationObserver, but for nsIAnimationObservers. This
1211 * additionally records on the document that animation observers have
1212 * been registered, which is used to determine whether notifications
1213 * must be fired when animations are added, removed or changed.
1215 void AddAnimationObserver(nsIAnimationObserver
* aAnimationObserver
);
1218 * Same as above, but only adds the observer if its not observing
1221 void AddAnimationObserverUnlessExists(
1222 nsIAnimationObserver
* aAnimationObserver
);
1225 * Removes a mutation observer.
1227 void RemoveMutationObserver(nsIMutationObserver
* aMutationObserver
) {
1228 nsSlots
* s
= GetExistingSlots();
1230 s
->mMutationObservers
.remove(aMutationObserver
);
1234 void RemoveMutationObserver(nsMultiMutationObserver
* aMultiMutationObserver
);
1236 mozilla::SafeDoublyLinkedList
<nsIMutationObserver
>* GetMutationObservers();
1239 * Helper methods to access ancestor node(s) of type T.
1240 * The implementations of the methods are in mozilla/dom/AncestorIterator.h.
1242 template <typename T
>
1243 inline mozilla::dom::AncestorsOfTypeIterator
<T
> AncestorsOfType() const;
1245 template <typename T
>
1246 inline mozilla::dom::InclusiveAncestorsOfTypeIterator
<T
>
1247 InclusiveAncestorsOfType() const;
1249 template <typename T
>
1250 inline mozilla::dom::FlatTreeAncestorsOfTypeIterator
<T
>
1251 FlatTreeAncestorsOfType() const;
1253 template <typename T
>
1254 inline mozilla::dom::InclusiveFlatTreeAncestorsOfTypeIterator
<T
>
1255 InclusiveFlatTreeAncestorsOfType() const;
1257 template <typename T
>
1258 T
* FirstAncestorOfType() const;
1262 * Walks aNode, its attributes and, if aDeep is true, its descendant nodes.
1263 * If aClone is true the nodes will be cloned. If aNewNodeInfoManager is
1264 * not null, it is used to create new nodeinfos for the nodes. Also reparents
1265 * the XPConnect wrappers for the nodes into aReparentScope if non-null.
1267 * @param aNode Node to adopt/clone.
1268 * @param aClone If true the node will be cloned and the cloned node will
1270 * @param aDeep If true the function will be called recursively on
1271 * descendants of the node
1272 * @param aNewNodeInfoManager The nodeinfo manager to use to create new
1273 * nodeinfos for aNode and its attributes and
1274 * descendants. May be null if the nodeinfos
1275 * shouldn't be changed.
1276 * @param aReparentScope Scope into which wrappers should be reparented, or
1277 * null if no reparenting should be done.
1278 * @param aParent If aClone is true the cloned node will be appended to
1279 * aParent's children. May be null. If not null then aNode
1280 * must be an nsIContent.
1281 * @param aError The error, if any.
1283 * @return If aClone is true then the cloned node will be returned,
1284 * unless an error occurred. In error conditions, null
1287 static already_AddRefed
<nsINode
> CloneAndAdopt(
1288 nsINode
* aNode
, bool aClone
, bool aDeep
,
1289 nsNodeInfoManager
* aNewNodeInfoManager
,
1290 JS::Handle
<JSObject
*> aReparentScope
, nsINode
* aParent
,
1291 mozilla::ErrorResult
& aError
);
1295 * Walks the node, its attributes and descendant nodes. If aNewNodeInfoManager
1296 * is not null, it is used to create new nodeinfos for the nodes. Also
1297 * reparents the XPConnect wrappers for the nodes into aReparentScope if
1300 * @param aNewNodeInfoManager The nodeinfo manager to use to create new
1301 * nodeinfos for the node and its attributes and
1302 * descendants. May be null if the nodeinfos
1303 * shouldn't be changed.
1304 * @param aReparentScope New scope for the wrappers, or null if no reparenting
1306 * @param aError The error, if any.
1308 void Adopt(nsNodeInfoManager
* aNewNodeInfoManager
,
1309 JS::Handle
<JSObject
*> aReparentScope
,
1310 mozilla::ErrorResult
& aError
);
1313 * Clones the node, its attributes and, if aDeep is true, its descendant nodes
1314 * If aNewNodeInfoManager is not null, it is used to create new nodeinfos for
1317 * @param aDeep If true the function will be called recursively on
1318 * descendants of the node
1319 * @param aNewNodeInfoManager The nodeinfo manager to use to create new
1320 * nodeinfos for the node and its attributes and
1321 * descendants. May be null if the nodeinfos
1322 * shouldn't be changed.
1323 * @param aError The error, if any.
1325 * @return The newly created node. Null in error conditions.
1327 already_AddRefed
<nsINode
> Clone(bool aDeep
,
1328 nsNodeInfoManager
* aNewNodeInfoManager
,
1329 mozilla::ErrorResult
& aError
);
1332 * Clones this node. This needs to be overriden by all node classes. aNodeInfo
1333 * should be identical to this node's nodeInfo, except for the document which
1334 * may be different. When cloning an element, all attributes of the element
1335 * will be cloned. The children of the node will not be cloned.
1337 * @param aNodeInfo the nodeinfo to use for the clone
1338 * @param aResult the clone
1340 virtual nsresult
Clone(mozilla::dom::NodeInfo
*, nsINode
** aResult
) const = 0;
1342 // This class can be extended by subclasses that wish to store more
1343 // information in the slots.
1348 // If needed we could remove the vtable pointer this dtor causes by
1349 // putting a DestroySlots function on nsINode
1352 virtual void Traverse(nsCycleCollectionTraversalCallback
&);
1353 virtual void Unlink(nsINode
&);
1356 * A list of mutation observers
1358 mozilla::SafeDoublyLinkedList
<nsIMutationObserver
> mMutationObservers
;
1361 * An object implementing NodeList for this content (childNodes)
1363 * @see nsGenericHTMLElement::GetChildNodes
1365 RefPtr
<nsAttrChildContentList
> mChildNodes
;
1368 * Weak reference to this node. This is cleared by the destructor of
1369 * nsNodeWeakReference.
1371 nsNodeWeakReference
* MOZ_NON_OWNING_REF mWeakReference
;
1374 * A set of ranges which are in the selection and which have this node as
1375 * their endpoints' closest common inclusive ancestor
1376 * (https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor). This is
1377 * a UniquePtr instead of just a LinkedList, because that prevents us from
1378 * pushing DOMSlots up to the next allocation bucket size, at the cost of
1381 mozilla::UniquePtr
<mozilla::LinkedList
<mozilla::dom::AbstractRange
>>
1382 mClosestCommonInclusiveAncestorRanges
;
1386 * Functions for managing flags and slots
1389 nsSlots
* DebugGetSlots() { return Slots(); }
1392 void SetFlags(FlagsType aFlagsToSet
) {
1395 (NODE_IS_NATIVE_ANONYMOUS_ROOT
| NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE
|
1396 NODE_DESCENDANTS_NEED_FRAMES
| NODE_NEEDS_FRAME
|
1397 NODE_HAS_BEEN_IN_UA_WIDGET
)) ||
1399 "Flag only permitted on nsIContent nodes");
1400 nsWrapperCache::SetFlags(aFlagsToSet
);
1403 void UnsetFlags(FlagsType aFlagsToUnset
) {
1404 NS_ASSERTION(!(aFlagsToUnset
& (NODE_HAS_BEEN_IN_UA_WIDGET
|
1405 NODE_IS_NATIVE_ANONYMOUS_ROOT
)),
1406 "Trying to unset write-only flags");
1407 nsWrapperCache::UnsetFlags(aFlagsToUnset
);
1410 void SetEditableFlag(bool aEditable
) {
1412 SetFlags(NODE_IS_EDITABLE
);
1414 UnsetFlags(NODE_IS_EDITABLE
);
1418 inline bool IsEditable() const;
1421 * Check if this node is in design mode or not. When this returns true and:
1422 * - if this is a Document node, it's the design mode root.
1423 * - if this is a content node, it's connected, it's not in a shadow tree
1424 * (except shadow tree for UI widget and native anonymous subtree) and its
1425 * uncomposed document is in design mode.
1426 * Note that returning true does NOT mean the node or its children is
1427 * editable. E.g., when this node is in a shadow tree of a UA widget and its
1428 * host is in design mode.
1430 inline bool IsInDesignMode() const;
1433 * Returns true if |this| or any of its ancestors is native anonymous.
1435 bool IsInNativeAnonymousSubtree() const {
1436 return HasFlag(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE
);
1440 * If |this| or any ancestor is native anonymous, return the root of the
1441 * native anonymous subtree. Note that in case of nested native anonymous
1442 * content, this returns the innermost root, not the outermost.
1444 nsIContent
* GetClosestNativeAnonymousSubtreeRoot() const {
1445 if (!IsInNativeAnonymousSubtree()) {
1446 MOZ_ASSERT(!HasBeenInUAWidget(), "UA widget implies anonymous");
1449 MOZ_ASSERT(IsContent(), "How did non-content end up in NAC?");
1450 if (HasBeenInUAWidget()) {
1451 // reinterpret_cast because in this header we don't know ShadowRoot is an
1452 // nsIContent. ShadowRoot constructor asserts this is correct.
1453 return reinterpret_cast<nsIContent
*>(GetContainingShadow());
1455 for (const nsINode
* node
= this; node
; node
= node
->GetParentNode()) {
1456 if (node
->IsRootOfNativeAnonymousSubtree()) {
1457 return const_cast<nsINode
*>(node
)->AsContent();
1460 // FIXME(emilio): This should not happen, usually, but editor removes nodes
1461 // in native anonymous subtrees, and we don't clean nodes from the current
1462 // event content stack from ContentRemoved, so it can actually happen, see
1464 NS_WARNING("GetClosestNativeAnonymousSubtreeRoot on disconnected NAC!");
1469 * If |this| or any ancestor is native anonymous, return the parent of the
1470 * native anonymous subtree. Note that in case of nested native anonymous
1471 * content, this returns the parent or host of the innermost root, not the
1474 nsIContent
* GetClosestNativeAnonymousSubtreeRootParentOrHost() const {
1475 // We could put this in nsIContentInlines.h or such to avoid this
1476 // reinterpret_cast, but it doesn't seem worth it.
1477 const auto* root
= reinterpret_cast<const nsINode
*>(
1478 GetClosestNativeAnonymousSubtreeRoot());
1482 if (nsIContent
* parent
= root
->GetParent()) {
1485 if (MOZ_UNLIKELY(root
->IsInShadowTree())) {
1486 return root
->DoGetShadowHost();
1492 * Gets the root of the node tree for this content if it is in a shadow tree.
1494 mozilla::dom::ShadowRoot
* GetContainingShadow() const;
1496 * Gets the shadow host if this content is in a shadow tree. That is, the host
1497 * of |GetContainingShadow|, if its not null.
1499 * @return The shadow host, if this is in shadow tree, or null.
1501 nsIContent
* GetContainingShadowHost() const;
1503 bool IsInSVGUseShadowTree() const {
1504 return !!GetContainingSVGUseShadowHost();
1507 mozilla::dom::SVGUseElement
* GetContainingSVGUseShadowHost() const {
1508 if (!IsInShadowTree()) {
1511 return DoGetContainingSVGUseShadowHost();
1514 // Whether this node has ever been part of a UA widget shadow tree.
1515 bool HasBeenInUAWidget() const { return HasFlag(NODE_HAS_BEEN_IN_UA_WIDGET
); }
1517 // True for native anonymous content and for content in UA widgets.
1518 // Only nsIContent can fulfill this condition.
1519 bool ChromeOnlyAccess() const { return IsInNativeAnonymousSubtree(); }
1521 const nsIContent
* GetChromeOnlyAccessSubtreeRootParent() const {
1522 return GetClosestNativeAnonymousSubtreeRootParentOrHost();
1525 bool IsInShadowTree() const { return HasFlag(NODE_IS_IN_SHADOW_TREE
); }
1528 * Get whether this node is C++-generated anonymous content
1529 * @see nsIAnonymousContentCreator
1530 * @return whether this content is anonymous
1532 bool IsRootOfNativeAnonymousSubtree() const {
1534 !HasFlag(NODE_IS_NATIVE_ANONYMOUS_ROOT
) || IsInNativeAnonymousSubtree(),
1535 "Some flags seem to be missing!");
1536 return HasFlag(NODE_IS_NATIVE_ANONYMOUS_ROOT
);
1539 // Whether this node is the root of a ChromeOnlyAccess DOM subtree.
1540 bool IsRootOfChromeAccessOnlySubtree() const {
1541 return IsRootOfNativeAnonymousSubtree();
1545 * Returns true if |this| node is the closest common inclusive ancestor
1546 * (https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor) of the
1547 * start/end nodes of a Range in a Selection or a descendant of such a common
1548 * ancestor. This node is definitely not selected when |false| is returned,
1549 * but it may or may not be selected when |true| is returned.
1551 bool IsMaybeSelected() const {
1552 return IsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() ||
1553 IsClosestCommonInclusiveAncestorForRangeInSelection();
1557 * Return true if any part of (this, aStartOffset) .. (this, aEndOffset)
1558 * overlaps any nsRange in
1559 * GetClosestCommonInclusiveAncestorForRangeInSelection ranges (i.e.
1560 * where this is a descendant of a range's common inclusive ancestor node).
1561 * If a nsRange starts in (this, aEndOffset) or if it ends in
1562 * (this, aStartOffset) then it is non-overlapping and the result is false
1563 * for that nsRange. Collapsed ranges always counts as non-overlapping.
1565 * @param aStartOffset has to be less or equal to aEndOffset.
1567 bool IsSelected(uint32_t aStartOffset
, uint32_t aEndOffset
) const;
1570 * Get the root element of the text editor associated with this node or the
1571 * root element of the text editor of the ancestor 'TextControlElement' if
1572 * this is in its native anonymous subtree. I.e., this returns anonymous
1573 * `<div>` element of a `TextEditor`. Note that this can be used only for
1574 * getting root content of `<input>` or `<textarea>`. I.e., this method
1575 * doesn't support HTML editors. Note that this may create a `TextEditor`
1576 * instance, and it means that the `TextEditor` may modify its native
1577 * anonymous subtree and may run selection listeners.
1579 MOZ_CAN_RUN_SCRIPT
mozilla::dom::Element
* GetAnonymousRootElementOfTextEditor(
1580 mozilla::TextEditor
** aTextEditor
= nullptr);
1583 * Get the nearest selection root, ie. the node that will be selected if the
1584 * user does "Select All" while the focus is in this node. Note that if this
1585 * node is not in an editor, the result comes from the nsFrameSelection that
1586 * is related to aPresShell, so the result might not be the ancestor of this
1587 * node. Be aware that if this node and the computed selection limiter are
1588 * not in same subtree, this returns the root content of the closeset subtree.
1590 MOZ_CAN_RUN_SCRIPT nsIContent
* GetSelectionRootContent(
1591 mozilla::PresShell
* aPresShell
);
1593 nsINodeList
* ChildNodes();
1595 nsIContent
* GetFirstChild() const { return mFirstChild
; }
1597 nsIContent
* GetLastChild() const;
1600 * Implementation is in Document.h, because it needs to cast from
1601 * Document* to nsINode*.
1603 Document
* GetOwnerDocument() const;
1605 // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
1606 MOZ_CAN_RUN_SCRIPT_BOUNDARY
void Normalize();
1609 * Get the base URI for any relative URIs within this piece of
1610 * content. Generally, this is the document's base URI, but certain
1611 * content carries a local base for backward compatibility.
1613 * @return the base URI. May return null.
1615 virtual nsIURI
* GetBaseURI(bool aTryUseXHRDocBaseURI
= false) const = 0;
1616 nsIURI
* GetBaseURIObject() const;
1619 * Return true if the node may be apz aware. There are two cases. One is that
1620 * the node is apz aware (such as HTMLInputElement with number type). The
1621 * other is that the node has apz aware listeners. This is a non-virtual
1622 * function which calls IsNodeApzAwareInternal only when the MayBeApzAware is
1623 * set. We check the details in IsNodeApzAwareInternal which may be overriden
1626 bool IsNodeApzAware() const {
1627 return NodeMayBeApzAware() ? IsNodeApzAwareInternal() : false;
1631 * Override this function and set the flag MayBeApzAware in case the node has
1632 * to let APZC be aware of it. It's used when the node may handle the apz
1633 * aware events and may do preventDefault to stop APZC to do default actions.
1635 * For example, instead of scrolling page by APZ, we handle mouse wheel event
1636 * in HTMLInputElement with number type as increasing / decreasing its value.
1638 virtual bool IsNodeApzAwareInternal() const;
1640 void GetTextContent(nsAString
& aTextContent
, mozilla::OOMReporter
& aError
) {
1641 GetTextContentInternal(aTextContent
, aError
);
1643 void SetTextContent(const nsAString
& aTextContent
,
1644 nsIPrincipal
* aSubjectPrincipal
,
1645 mozilla::ErrorResult
& aError
) {
1646 SetTextContentInternal(aTextContent
, aSubjectPrincipal
, aError
);
1648 void SetTextContent(const nsAString
& aTextContent
,
1649 mozilla::ErrorResult
& aError
) {
1650 SetTextContentInternal(aTextContent
, nullptr, aError
);
1653 mozilla::dom::Element
* QuerySelector(const nsACString
& aSelector
,
1654 mozilla::ErrorResult
& aResult
);
1655 already_AddRefed
<nsINodeList
> QuerySelectorAll(const nsACString
& aSelector
,
1656 mozilla::ErrorResult
& aResult
);
1659 // Document and ShadowRoot override this with its own (faster) version.
1660 // This should really only be called for elements and document fragments.
1661 mozilla::dom::Element
* GetElementById(const nsAString
& aId
);
1663 void AppendChildToChildList(nsIContent
* aKid
);
1664 void InsertChildToChildList(nsIContent
* aKid
, nsIContent
* aNextSibling
);
1665 void DisconnectChild(nsIContent
* aKid
);
1668 void LookupPrefix(const nsAString
& aNamespace
, nsAString
& aResult
);
1669 bool IsDefaultNamespace(const nsAString
& aNamespaceURI
) {
1670 nsAutoString defaultNamespace
;
1671 LookupNamespaceURI(u
""_ns
, defaultNamespace
);
1672 return aNamespaceURI
.Equals(defaultNamespace
);
1674 void LookupNamespaceURI(const nsAString
& aNamespacePrefix
,
1675 nsAString
& aNamespaceURI
);
1677 nsIContent
* GetNextSibling() const { return mNextSibling
; }
1678 nsIContent
* GetPreviousSibling() const;
1681 * Return true if the node is being removed from the parent, it means that
1682 * the node still knows the container which it's disconnected from, but the
1683 * node has already been removed from the child node chain of the container.
1684 * I.e., Return true between a call of DisconnectChild of the parent and
1685 * a call of UnbindFromTree of the node.
1687 bool IsBeingRemoved() const {
1688 return mParent
&& !mNextSibling
&& !mPreviousOrLastSibling
;
1692 * Get the next node in the pre-order tree traversal of the DOM. If
1693 * aRoot is non-null, then it must be an ancestor of |this|
1694 * (possibly equal to |this|) and only nodes that are descendants of
1695 * aRoot, not including aRoot itself, will be returned. Returns
1696 * null if there are no more nodes to traverse.
1698 nsIContent
* GetNextNode(const nsINode
* aRoot
= nullptr) const {
1699 return GetNextNodeImpl(aRoot
, false);
1703 * Get the next node in the pre-order tree traversal of the DOM but ignoring
1704 * the children of this node. If aRoot is non-null, then it must be an
1705 * ancestor of |this| (possibly equal to |this|) and only nodes that are
1706 * descendants of aRoot, not including aRoot itself, will be returned.
1707 * Returns null if there are no more nodes to traverse.
1709 nsIContent
* GetNextNonChildNode(const nsINode
* aRoot
= nullptr) const {
1710 return GetNextNodeImpl(aRoot
, true);
1714 * Returns true if 'this' is either document or element or
1715 * document fragment and aOther is a descendant in the same
1718 bool Contains(const nsINode
* aOther
) const;
1720 bool UnoptimizableCCNode() const;
1723 * Fire a DOMNodeRemoved mutation event for all children of this node
1724 * TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
1726 MOZ_CAN_RUN_SCRIPT_BOUNDARY
void FireNodeRemovedForChildren();
1728 void QueueDevtoolsAnonymousEvent(bool aIsRemove
);
1731 mozilla::dom::SVGUseElement
* DoGetContainingSVGUseShadowHost() const;
1733 nsIContent
* GetNextNodeImpl(const nsINode
* aRoot
,
1734 const bool aSkipChildren
) const {
1737 // TODO: perhaps nsINode::IsInclusiveDescendantOf could be used instead.
1738 const nsINode
* cur
= this;
1739 for (; cur
; cur
= cur
->GetParentNode())
1740 if (cur
== aRoot
) break;
1741 NS_ASSERTION(cur
, "aRoot not an ancestor of |this|?");
1744 if (!aSkipChildren
) {
1745 nsIContent
* kid
= GetFirstChild();
1750 if (this == aRoot
) {
1753 const nsINode
* cur
= this;
1755 nsIContent
* next
= cur
->GetNextSibling();
1759 nsINode
* parent
= cur
->GetParentNode();
1760 if (parent
== aRoot
) {
1765 MOZ_ASSERT_UNREACHABLE("How did we get here?");
1770 * Get the previous nsIContent in the pre-order tree traversal of the DOM. If
1771 * aRoot is non-null, then it must be an ancestor of |this|
1772 * (possibly equal to |this|) and only nsIContents that are descendants of
1773 * aRoot, including aRoot itself, will be returned. Returns
1774 * null if there are no more nsIContents to traverse.
1776 nsIContent
* GetPreviousContent(const nsINode
* aRoot
= nullptr) const {
1779 // TODO: perhaps nsINode::IsInclusiveDescendantOf could be used instead.
1780 const nsINode
* cur
= this;
1781 for (; cur
; cur
= cur
->GetParentNode())
1782 if (cur
== aRoot
) break;
1783 NS_ASSERTION(cur
, "aRoot not an ancestor of |this|?");
1787 if (this == aRoot
) {
1790 nsIContent
* cur
= this->GetParent();
1791 nsIContent
* iter
= this->GetPreviousSibling();
1794 iter
= reinterpret_cast<nsINode
*>(iter
)->GetLastChild();
1804 // Set if we're being used from -moz-element
1805 NodeHasRenderingObservers
,
1806 // Set if our parent chain (including this node itself) terminates
1809 // Set if we're part of the composed doc.
1810 // https://dom.spec.whatwg.org/#connected
1812 // Set if mParent is an nsIContent
1814 // Set if this node is an Element
1816 // Set if the element has a non-empty id attribute. This can in rare
1817 // cases lie for nsXMLElement, such as when the node has been moved between
1818 // documents with different id mappings.
1820 // Set if the element might have a class.
1821 ElementMayHaveClass
,
1822 // Set if the element might have inline style.
1823 ElementMayHaveStyle
,
1824 // Set if the element has a name attribute set.
1826 // Set if the element has a part attribute set.
1828 // Set if the element might have a contenteditable attribute set.
1829 ElementMayHaveContentEditableAttr
,
1830 // Set if the node is the closest common inclusive ancestor of the start/end
1831 // nodes of a Range that is in a Selection.
1832 NodeIsClosestCommonInclusiveAncestorForRangeInSelection
,
1833 // Set if the node is a descendant of a node with the above bit set.
1834 NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection
,
1835 // Set if CanSkipInCC check has been done for this subtree root.
1837 // Maybe set if this node is in black subtree.
1839 // Maybe set if the node is a root of a subtree
1840 // which needs to be kept in the purple buffer.
1842 // Set if the element has some style states locked
1843 ElementHasLockedStyleStates
,
1844 // Set if element has pointer locked
1845 ElementHasPointerLock
,
1846 // Set if the node may have DOMMutationObserver attached to it.
1847 NodeMayHaveDOMMutationObserver
,
1848 // Set if node is Content
1850 // Set if the node has animations or transitions
1851 ElementHasAnimations
,
1852 // Set if node has a dir attribute with a valid value (ltr, rtl, or auto).
1853 // Note that we cannot compute this from the dir attribute event state
1854 // flags, because we can't use those to distinguish
1855 // <bdi dir="some-invalid-value"> and <bdi dir="auto">.
1856 NodeHasValidDirAttribute
,
1857 // Set if the node has dir=auto and has a property pointing to the text
1858 // node that determines its direction
1860 // Set if the node is a text node descendant of a node with dir=auto
1861 // and has a TextNodeDirectionalityMap property listing the elements whose
1862 // direction it determines.
1863 NodeHasTextNodeDirectionalityMap
,
1864 // Set if a node in the node's parent chain has dir=auto.
1865 NodeAncestorHasDirAuto
,
1866 // Set if the node is handling a click.
1868 // Set if the element has a parser insertion mode other than "in body",
1869 // per the HTML5 "Parse state" section.
1870 ElementHasWeirdParserInsertionMode
,
1871 // Parser sets this flag if it has notified about the node.
1873 // Sets if the node is apz aware or we have apz aware listeners.
1875 // Set if the element might have any kind of anonymous content children,
1876 // which would not be found through the element's children list.
1877 ElementMayHaveAnonymousChildren
,
1878 // Set if element has CustomElementData.
1879 ElementHasCustomElementData
,
1880 // Set if the element was created from prototype cache and
1881 // its l10n attributes haven't been changed.
1882 ElementCreatedFromPrototypeAndHasUnmodifiedL10n
,
1887 void SetBoolFlag(BooleanFlag name
, bool value
) {
1888 static_assert(BooleanFlagCount
<= 8 * sizeof(mBoolFlags
),
1889 "Too many boolean flags");
1890 mBoolFlags
= (mBoolFlags
& ~(1 << name
)) | (value
<< name
);
1893 void SetBoolFlag(BooleanFlag name
) {
1894 static_assert(BooleanFlagCount
<= 8 * sizeof(mBoolFlags
),
1895 "Too many boolean flags");
1896 mBoolFlags
|= (1 << name
);
1899 void ClearBoolFlag(BooleanFlag name
) {
1900 static_assert(BooleanFlagCount
<= 8 * sizeof(mBoolFlags
),
1901 "Too many boolean flags");
1902 mBoolFlags
&= ~(1 << name
);
1905 bool GetBoolFlag(BooleanFlag name
) const {
1906 static_assert(BooleanFlagCount
<= 8 * sizeof(mBoolFlags
),
1907 "Too many boolean flags");
1908 return mBoolFlags
& (1 << name
);
1912 bool HasRenderingObservers() const {
1913 return GetBoolFlag(NodeHasRenderingObservers
);
1915 void SetHasRenderingObservers(bool aValue
) {
1916 SetBoolFlag(NodeHasRenderingObservers
, aValue
);
1918 bool IsContent() const { return GetBoolFlag(NodeIsContent
); }
1919 bool HasID() const { return GetBoolFlag(ElementHasID
); }
1920 bool MayHaveClass() const { return GetBoolFlag(ElementMayHaveClass
); }
1921 void SetMayHaveClass() { SetBoolFlag(ElementMayHaveClass
); }
1922 bool MayHaveStyle() const { return GetBoolFlag(ElementMayHaveStyle
); }
1923 bool HasName() const { return GetBoolFlag(ElementHasName
); }
1924 bool HasPartAttribute() const { return GetBoolFlag(ElementHasPart
); }
1925 bool MayHaveContentEditableAttr() const {
1926 return GetBoolFlag(ElementMayHaveContentEditableAttr
);
1929 * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
1931 bool IsClosestCommonInclusiveAncestorForRangeInSelection() const {
1932 return GetBoolFlag(NodeIsClosestCommonInclusiveAncestorForRangeInSelection
);
1935 * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
1937 void SetClosestCommonInclusiveAncestorForRangeInSelection() {
1938 SetBoolFlag(NodeIsClosestCommonInclusiveAncestorForRangeInSelection
);
1941 * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
1943 void ClearClosestCommonInclusiveAncestorForRangeInSelection() {
1944 ClearBoolFlag(NodeIsClosestCommonInclusiveAncestorForRangeInSelection
);
1947 * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
1949 bool IsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() const {
1951 NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection
);
1954 * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
1956 void SetDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() {
1958 NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection
);
1961 * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
1963 void ClearDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() {
1965 NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection
);
1968 void SetCCMarkedRoot(bool aValue
) { SetBoolFlag(NodeIsCCMarkedRoot
, aValue
); }
1969 bool CCMarkedRoot() const { return GetBoolFlag(NodeIsCCMarkedRoot
); }
1970 void SetInCCBlackTree(bool aValue
) { SetBoolFlag(NodeIsCCBlackTree
, aValue
); }
1971 bool InCCBlackTree() const { return GetBoolFlag(NodeIsCCBlackTree
); }
1972 void SetIsPurpleRoot(bool aValue
) { SetBoolFlag(NodeIsPurpleRoot
, aValue
); }
1973 bool IsPurpleRoot() const { return GetBoolFlag(NodeIsPurpleRoot
); }
1974 bool MayHaveDOMMutationObserver() {
1975 return GetBoolFlag(NodeMayHaveDOMMutationObserver
);
1977 void SetMayHaveDOMMutationObserver() {
1978 SetBoolFlag(NodeMayHaveDOMMutationObserver
, true);
1980 bool HasListenerManager() { return HasFlag(NODE_HAS_LISTENERMANAGER
); }
1981 bool HasPointerLock() const { return GetBoolFlag(ElementHasPointerLock
); }
1982 void SetPointerLock() { SetBoolFlag(ElementHasPointerLock
); }
1983 void ClearPointerLock() { ClearBoolFlag(ElementHasPointerLock
); }
1984 bool MayHaveAnimations() const { return GetBoolFlag(ElementHasAnimations
); }
1985 void SetMayHaveAnimations() { SetBoolFlag(ElementHasAnimations
); }
1986 void ClearMayHaveAnimations() { ClearBoolFlag(ElementHasAnimations
); }
1987 void SetHasValidDir() { SetBoolFlag(NodeHasValidDirAttribute
); }
1988 void ClearHasValidDir() { ClearBoolFlag(NodeHasValidDirAttribute
); }
1989 bool HasValidDir() const { return GetBoolFlag(NodeHasValidDirAttribute
); }
1990 void SetHasDirAutoSet() {
1991 MOZ_ASSERT(NodeType() != TEXT_NODE
, "SetHasDirAutoSet on text node");
1992 SetBoolFlag(NodeHasDirAutoSet
);
1994 void ClearHasDirAutoSet() {
1995 MOZ_ASSERT(NodeType() != TEXT_NODE
, "ClearHasDirAutoSet on text node");
1996 ClearBoolFlag(NodeHasDirAutoSet
);
1998 bool HasDirAutoSet() const { return GetBoolFlag(NodeHasDirAutoSet
); }
1999 void SetHasTextNodeDirectionalityMap() {
2000 MOZ_ASSERT(NodeType() == TEXT_NODE
,
2001 "SetHasTextNodeDirectionalityMap on non-text node");
2002 SetBoolFlag(NodeHasTextNodeDirectionalityMap
);
2004 void ClearHasTextNodeDirectionalityMap() {
2005 MOZ_ASSERT(NodeType() == TEXT_NODE
,
2006 "ClearHasTextNodeDirectionalityMap on non-text node");
2007 ClearBoolFlag(NodeHasTextNodeDirectionalityMap
);
2009 bool HasTextNodeDirectionalityMap() const {
2010 MOZ_ASSERT(NodeType() == TEXT_NODE
,
2011 "HasTextNodeDirectionalityMap on non-text node");
2012 return GetBoolFlag(NodeHasTextNodeDirectionalityMap
);
2015 void SetAncestorHasDirAuto() { SetBoolFlag(NodeAncestorHasDirAuto
); }
2016 void ClearAncestorHasDirAuto() { ClearBoolFlag(NodeAncestorHasDirAuto
); }
2017 bool AncestorHasDirAuto() const {
2018 return GetBoolFlag(NodeAncestorHasDirAuto
);
2021 // Implemented in nsIContentInlines.h.
2022 inline bool NodeOrAncestorHasDirAuto() const;
2024 void SetParserHasNotified() { SetBoolFlag(ParserHasNotified
); };
2025 bool HasParserNotified() { return GetBoolFlag(ParserHasNotified
); }
2027 void SetMayBeApzAware() { SetBoolFlag(MayBeApzAware
); }
2028 bool NodeMayBeApzAware() const { return GetBoolFlag(MayBeApzAware
); }
2030 void SetMayHaveAnonymousChildren() {
2031 SetBoolFlag(ElementMayHaveAnonymousChildren
);
2033 bool MayHaveAnonymousChildren() const {
2034 return GetBoolFlag(ElementMayHaveAnonymousChildren
);
2037 void SetHasCustomElementData() { SetBoolFlag(ElementHasCustomElementData
); }
2038 bool HasCustomElementData() const {
2039 return GetBoolFlag(ElementHasCustomElementData
);
2042 void SetElementCreatedFromPrototypeAndHasUnmodifiedL10n() {
2043 SetBoolFlag(ElementCreatedFromPrototypeAndHasUnmodifiedL10n
);
2045 bool HasElementCreatedFromPrototypeAndHasUnmodifiedL10n() {
2046 return GetBoolFlag(ElementCreatedFromPrototypeAndHasUnmodifiedL10n
);
2048 void ClearElementCreatedFromPrototypeAndHasUnmodifiedL10n() {
2049 ClearBoolFlag(ElementCreatedFromPrototypeAndHasUnmodifiedL10n
);
2053 void SetParentIsContent(bool aValue
) { SetBoolFlag(ParentIsContent
, aValue
); }
2054 void SetIsInDocument() { SetBoolFlag(IsInDocument
); }
2055 void ClearInDocument() { ClearBoolFlag(IsInDocument
); }
2056 void SetIsConnected(bool aConnected
) { SetBoolFlag(IsConnected
, aConnected
); }
2057 void SetNodeIsContent() { SetBoolFlag(NodeIsContent
); }
2058 void SetIsElement() { SetBoolFlag(NodeIsElement
); }
2059 void SetHasID() { SetBoolFlag(ElementHasID
); }
2060 void ClearHasID() { ClearBoolFlag(ElementHasID
); }
2061 void SetMayHaveStyle() { SetBoolFlag(ElementMayHaveStyle
); }
2062 void SetHasName() { SetBoolFlag(ElementHasName
); }
2063 void ClearHasName() { ClearBoolFlag(ElementHasName
); }
2064 void SetHasPartAttribute(bool aPart
) { SetBoolFlag(ElementHasPart
, aPart
); }
2065 void SetMayHaveContentEditableAttr() {
2066 SetBoolFlag(ElementMayHaveContentEditableAttr
);
2068 void SetHasLockedStyleStates() { SetBoolFlag(ElementHasLockedStyleStates
); }
2069 void ClearHasLockedStyleStates() {
2070 ClearBoolFlag(ElementHasLockedStyleStates
);
2072 bool HasLockedStyleStates() const {
2073 return GetBoolFlag(ElementHasLockedStyleStates
);
2075 void SetHasWeirdParserInsertionMode() {
2076 SetBoolFlag(ElementHasWeirdParserInsertionMode
);
2078 bool HasWeirdParserInsertionMode() const {
2079 return GetBoolFlag(ElementHasWeirdParserInsertionMode
);
2081 bool HandlingClick() const { return GetBoolFlag(NodeHandlingClick
); }
2082 void SetHandlingClick() { SetBoolFlag(NodeHandlingClick
); }
2083 void ClearHandlingClick() { ClearBoolFlag(NodeHandlingClick
); }
2085 void SetSubtreeRootPointer(nsINode
* aSubtreeRoot
) {
2086 NS_ASSERTION(aSubtreeRoot
, "aSubtreeRoot can never be null!");
2087 NS_ASSERTION(!(IsContent() && IsInUncomposedDoc()) && !IsInShadowTree(),
2088 "Shouldn't be here!");
2089 mSubtreeRoot
= aSubtreeRoot
;
2092 void ClearSubtreeRootPointer() { mSubtreeRoot
= nullptr; }
2095 // Makes nsINode object to keep aObject alive.
2096 void BindObject(nsISupports
* aObject
);
2097 // After calling UnbindObject nsINode object doesn't keep
2098 // aObject alive anymore.
2099 void UnbindObject(nsISupports
* aObject
);
2101 void GenerateXPath(nsAString
& aResult
);
2103 already_AddRefed
<mozilla::dom::AccessibleNode
> GetAccessibleNode();
2106 * Returns the length of this node, as specified at
2107 * <http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#concept-node-length>
2109 uint32_t Length() const;
2111 void GetNodeName(mozilla::dom::DOMString
& aNodeName
) {
2112 const nsString
& nodeName
= NodeName();
2113 aNodeName
.SetKnownLiveString(nodeName
);
2115 [[nodiscard
]] nsresult
GetBaseURI(nsAString
& aBaseURI
) const;
2116 // Return the base URI for the document.
2117 // The returned value may differ if the document is loaded via XHR, and
2118 // when accessed from chrome privileged script and
2119 // from content privileged script for compatibility.
2120 void GetBaseURIFromJS(nsAString
& aBaseURI
, CallerType aCallerType
,
2121 ErrorResult
& aRv
) const;
2122 bool HasChildNodes() const { return HasChildren(); }
2124 // See nsContentUtils::PositionIsBefore for aThisIndex and aOtherIndex usage.
2125 uint16_t CompareDocumentPosition(
2126 nsINode
& aOther
, mozilla::Maybe
<uint32_t>* aThisIndex
= nullptr,
2127 mozilla::Maybe
<uint32_t>* aOtherIndex
= nullptr) const;
2128 void GetNodeValue(nsAString
& aNodeValue
) { GetNodeValueInternal(aNodeValue
); }
2129 void SetNodeValue(const nsAString
& aNodeValue
, mozilla::ErrorResult
& aError
) {
2130 SetNodeValueInternal(aNodeValue
, aError
);
2132 virtual void GetNodeValueInternal(nsAString
& aNodeValue
);
2133 virtual void SetNodeValueInternal(const nsAString
& aNodeValue
,
2134 mozilla::ErrorResult
& aError
) {
2135 // The DOM spec says that when nodeValue is defined to be null "setting it
2136 // has no effect", so we don't throw an exception.
2138 void EnsurePreInsertionValidity(nsINode
& aNewChild
, nsINode
* aRefChild
,
2139 mozilla::ErrorResult
& aError
);
2140 nsINode
* InsertBefore(nsINode
& aNode
, nsINode
* aChild
,
2141 mozilla::ErrorResult
& aError
) {
2142 return ReplaceOrInsertBefore(false, &aNode
, aChild
, aError
);
2146 * See <https://dom.spec.whatwg.org/#dom-node-appendchild>.
2148 nsINode
* AppendChild(nsINode
& aNode
, mozilla::ErrorResult
& aError
) {
2149 return InsertBefore(aNode
, nullptr, aError
);
2152 nsINode
* ReplaceChild(nsINode
& aNode
, nsINode
& aChild
,
2153 mozilla::ErrorResult
& aError
) {
2154 return ReplaceOrInsertBefore(true, &aNode
, &aChild
, aError
);
2156 // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
2157 MOZ_CAN_RUN_SCRIPT_BOUNDARY nsINode
* RemoveChild(
2158 nsINode
& aChild
, mozilla::ErrorResult
& aError
);
2159 already_AddRefed
<nsINode
> CloneNode(bool aDeep
, mozilla::ErrorResult
& aError
);
2160 bool IsSameNode(nsINode
* aNode
);
2161 bool IsEqualNode(nsINode
* aNode
);
2162 void GetNamespaceURI(nsAString
& aNamespaceURI
) const {
2163 mNodeInfo
->GetNamespaceURI(aNamespaceURI
);
2165 #ifdef MOZILLA_INTERNAL_API
2166 void GetPrefix(nsAString
& aPrefix
) { mNodeInfo
->GetPrefix(aPrefix
); }
2168 void GetLocalName(mozilla::dom::DOMString
& aLocalName
) const {
2169 const nsString
& localName
= LocalName();
2170 aLocalName
.SetKnownLiveString(localName
);
2173 nsDOMAttributeMap
* GetAttributes();
2175 // Helper method to remove this node from its parent. This is not exposed
2177 // Only call this if the node has a parent node.
2178 nsresult
RemoveFromParent() {
2179 nsINode
* parent
= GetParentNode();
2180 mozilla::ErrorResult rv
;
2181 parent
->RemoveChild(*this, rv
);
2182 return rv
.StealNSResult();
2185 // ChildNode methods
2186 inline mozilla::dom::Element
* GetPreviousElementSibling() const;
2187 inline mozilla::dom::Element
* GetNextElementSibling() const;
2189 MOZ_CAN_RUN_SCRIPT
void Before(const Sequence
<OwningNodeOrString
>& aNodes
,
2191 MOZ_CAN_RUN_SCRIPT
void After(const Sequence
<OwningNodeOrString
>& aNodes
,
2193 MOZ_CAN_RUN_SCRIPT
void ReplaceWith(
2194 const Sequence
<OwningNodeOrString
>& aNodes
, ErrorResult
& aRv
);
2196 * Remove this node from its parent, if any.
2200 // ParentNode methods
2201 mozilla::dom::Element
* GetFirstElementChild() const;
2202 mozilla::dom::Element
* GetLastElementChild() const;
2204 already_AddRefed
<nsIHTMLCollection
> GetElementsByAttribute(
2205 const nsAString
& aAttribute
, const nsAString
& aValue
);
2206 already_AddRefed
<nsIHTMLCollection
> GetElementsByAttributeNS(
2207 const nsAString
& aNamespaceURI
, const nsAString
& aAttribute
,
2208 const nsAString
& aValue
, ErrorResult
& aRv
);
2210 MOZ_CAN_RUN_SCRIPT
void Prepend(const Sequence
<OwningNodeOrString
>& aNodes
,
2212 MOZ_CAN_RUN_SCRIPT
void Append(const Sequence
<OwningNodeOrString
>& aNodes
,
2214 MOZ_CAN_RUN_SCRIPT
void ReplaceChildren(
2215 const Sequence
<OwningNodeOrString
>& aNodes
, ErrorResult
& aRv
);
2216 MOZ_CAN_RUN_SCRIPT
void ReplaceChildren(nsINode
* aNode
, ErrorResult
& aRv
);
2218 void GetBoxQuads(const BoxQuadOptions
& aOptions
,
2219 nsTArray
<RefPtr
<DOMQuad
>>& aResult
, CallerType aCallerType
,
2222 void GetBoxQuadsFromWindowOrigin(const BoxQuadOptions
& aOptions
,
2223 nsTArray
<RefPtr
<DOMQuad
>>& aResult
,
2226 already_AddRefed
<DOMQuad
> ConvertQuadFromNode(
2227 DOMQuad
& aQuad
, const TextOrElementOrDocument
& aFrom
,
2228 const ConvertCoordinateOptions
& aOptions
, CallerType aCallerType
,
2230 already_AddRefed
<DOMQuad
> ConvertRectFromNode(
2231 DOMRectReadOnly
& aRect
, const TextOrElementOrDocument
& aFrom
,
2232 const ConvertCoordinateOptions
& aOptions
, CallerType aCallerType
,
2234 already_AddRefed
<DOMPoint
> ConvertPointFromNode(
2235 const DOMPointInit
& aPoint
, const TextOrElementOrDocument
& aFrom
,
2236 const ConvertCoordinateOptions
& aOptions
, CallerType aCallerType
,
2240 * See nsSlots::mClosestCommonInclusiveAncestorRanges.
2242 const mozilla::LinkedList
<mozilla::dom::AbstractRange
>*
2243 GetExistingClosestCommonInclusiveAncestorRanges() const {
2247 return GetExistingSlots()->mClosestCommonInclusiveAncestorRanges
.get();
2251 * See nsSlots::mClosestCommonInclusiveAncestorRanges.
2253 mozilla::LinkedList
<mozilla::dom::AbstractRange
>*
2254 GetExistingClosestCommonInclusiveAncestorRanges() {
2258 return GetExistingSlots()->mClosestCommonInclusiveAncestorRanges
.get();
2262 * See nsSlots::mClosestCommonInclusiveAncestorRanges.
2264 mozilla::UniquePtr
<mozilla::LinkedList
<mozilla::dom::AbstractRange
>>&
2265 GetClosestCommonInclusiveAncestorRangesPtr() {
2266 return Slots()->mClosestCommonInclusiveAncestorRanges
;
2269 nsIWeakReference
* GetExistingWeakReference() {
2270 return HasSlots() ? GetExistingSlots()->mWeakReference
: nullptr;
2274 // Override this function to create a custom slots class.
2275 // Must not return null.
2276 virtual nsINode::nsSlots
* CreateSlots();
2278 bool HasSlots() const { return mSlots
!= nullptr; }
2280 nsSlots
* GetExistingSlots() const { return mSlots
; }
2284 mSlots
= CreateSlots();
2287 return GetExistingSlots();
2291 * Invalidate cached child array inside mChildNodes
2292 * of type nsParentNodeChildContentList.
2294 void InvalidateChildNodes();
2296 virtual void GetTextContentInternal(nsAString
& aTextContent
,
2297 mozilla::OOMReporter
& aError
);
2298 virtual void SetTextContentInternal(const nsAString
& aTextContent
,
2299 nsIPrincipal
* aSubjectPrincipal
,
2300 mozilla::ErrorResult
& aError
) {}
2302 void EnsurePreInsertionValidity1(mozilla::ErrorResult
& aError
);
2303 void EnsurePreInsertionValidity2(bool aReplace
, nsINode
& aNewChild
,
2305 mozilla::ErrorResult
& aError
);
2306 // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
2307 MOZ_CAN_RUN_SCRIPT_BOUNDARY nsINode
* ReplaceOrInsertBefore(
2308 bool aReplace
, nsINode
* aNewChild
, nsINode
* aRefChild
,
2309 mozilla::ErrorResult
& aError
);
2312 * Returns the Element that should be used for resolving namespaces
2313 * on this node (ie the ownerElement for attributes, the documentElement for
2314 * documents, the node itself for elements and for other nodes the parentNode
2315 * if it is an element).
2317 virtual mozilla::dom::Element
* GetNameSpaceElement() = 0;
2320 * Parse the given selector string into a servo SelectorList.
2322 * Never returns null if aRv is not failing.
2324 * Note that the selector list returned here is owned by the owner doc's
2327 const mozilla::StyleSelectorList
* ParseSelectorList(
2328 const nsACString
& aSelectorString
, mozilla::ErrorResult
&);
2331 /* Event stuff that documents and elements share.
2333 Note that we include DOCUMENT_ONLY_EVENT events here so that we
2334 can forward all the document stuff to this implementation.
2336 #define EVENT(name_, id_, type_, struct_) \
2337 mozilla::dom::EventHandlerNonNull* GetOn##name_() { \
2338 return GetEventHandler(nsGkAtoms::on##name_); \
2340 void SetOn##name_(mozilla::dom::EventHandlerNonNull* handler) { \
2341 SetEventHandler(nsGkAtoms::on##name_, handler); \
2343 #define TOUCH_EVENT EVENT
2344 #define DOCUMENT_ONLY_EVENT EVENT
2345 #include "mozilla/EventNameList.h"
2346 #undef DOCUMENT_ONLY_EVENT
2350 NodeSelectorFlags
GetSelectorFlags() const {
2351 return static_cast<NodeSelectorFlags
>(mSelectorFlags
.Get());
2355 static bool Traverse(nsINode
* tmp
, nsCycleCollectionTraversalCallback
& cb
);
2356 static void Unlink(nsINode
* tmp
);
2358 RefPtr
<mozilla::dom::NodeInfo
> mNodeInfo
;
2360 // mParent is an owning ref most of the time, except for the case of document
2361 // nodes, so it cannot be represented by nsCOMPtr, so mark is as
2363 nsINode
* MOZ_OWNING_REF mParent
;
2366 #ifndef BOOL_FLAGS_ON_WRAPPER_CACHE
2368 uint32_t mBoolFlags
;
2371 mozilla::RustCell
<uint32_t> mSelectorFlags
{0};
2373 uint32_t mChildCount
;
2376 // mNextSibling and mFirstChild are strong references while
2377 // mPreviousOrLastSibling is a weak ref. |mFirstChild->mPreviousOrLastSibling|
2378 // points to the last child node.
2379 nsCOMPtr
<nsIContent
> mFirstChild
;
2380 nsCOMPtr
<nsIContent
> mNextSibling
;
2381 nsIContent
* MOZ_NON_OWNING_REF mPreviousOrLastSibling
;
2384 // Pointer to our primary frame. Might be null.
2385 nsIFrame
* mPrimaryFrame
;
2387 // Pointer to the root of our subtree. Might be null.
2388 // This reference is non-owning and safe, since it either points to the
2389 // object itself, or is reset by ClearSubtreeRootPointer.
2390 nsINode
* MOZ_NON_OWNING_REF mSubtreeRoot
;
2393 // Storage for more members that are usually not needed; allocated lazily.
2397 NON_VIRTUAL_ADDREF_RELEASE(nsINode
)
2399 inline nsINode
* mozilla::dom::EventTarget::GetAsNode() {
2400 return IsNode() ? AsNode() : nullptr;
2403 inline const nsINode
* mozilla::dom::EventTarget::GetAsNode() const {
2404 return const_cast<mozilla::dom::EventTarget
*>(this)->GetAsNode();
2407 inline nsINode
* mozilla::dom::EventTarget::AsNode() {
2408 MOZ_DIAGNOSTIC_ASSERT(IsNode());
2409 return static_cast<nsINode
*>(this);
2412 inline const nsINode
* mozilla::dom::EventTarget::AsNode() const {
2413 MOZ_DIAGNOSTIC_ASSERT(IsNode());
2414 return static_cast<const nsINode
*>(this);
2417 // Useful inline function for getting a node given an nsIContent and a Document.
2418 // Returns the first argument cast to nsINode if it is non-null, otherwise
2419 // returns the second (which may be null). We use type variables instead of
2420 // nsIContent* and Document* because the actual types must be
2421 // known for the cast to work.
2422 template <class C
, class D
>
2423 inline nsINode
* NODE_FROM(C
& aContent
, D
& aDocument
) {
2424 if (aContent
) return static_cast<nsINode
*>(aContent
);
2425 return static_cast<nsINode
*>(aDocument
);
2428 NS_DEFINE_STATIC_IID_ACCESSOR(nsINode
, NS_INODE_IID
)
2430 inline nsISupports
* ToSupports(nsINode
* aPointer
) { return aPointer
; }
2432 // Some checks are faster to do on nsIContent or Element than on
2433 // nsINode, so spit out FromNode versions taking those types too.
2434 #define NS_IMPL_FROMNODE_GENERIC(_class, _check, _const) \
2435 template <typename T> \
2436 static auto FromNode(_const T& aNode) \
2437 -> decltype(static_cast<_const _class*>(&aNode)) { \
2438 return aNode._check ? static_cast<_const _class*>(&aNode) : nullptr; \
2440 template <typename T> \
2441 static _const _class* FromNode(_const T* aNode) { \
2442 return FromNode(*aNode); \
2444 template <typename T> \
2445 static _const _class* FromNodeOrNull(_const T* aNode) { \
2446 return aNode ? FromNode(*aNode) : nullptr; \
2448 template <typename T> \
2449 static auto FromEventTarget(_const T& aEventTarget) \
2450 -> decltype(static_cast<_const _class*>(&aEventTarget)) { \
2451 return aEventTarget.IsNode() && aEventTarget.AsNode()->_check \
2452 ? static_cast<_const _class*>(&aEventTarget) \
2455 template <typename T> \
2456 static _const _class* FromEventTarget(_const T* aEventTarget) { \
2457 return FromEventTarget(*aEventTarget); \
2459 template <typename T> \
2460 static _const _class* FromEventTargetOrNull(_const T* aEventTarget) { \
2461 return aEventTarget ? FromEventTarget(*aEventTarget) : nullptr; \
2464 #define NS_IMPL_FROMNODE_HELPER(_class, _check) \
2465 NS_IMPL_FROMNODE_GENERIC(_class, _check, ) \
2466 NS_IMPL_FROMNODE_GENERIC(_class, _check, const) \
2468 template <typename T> \
2469 static _class* FromNode(T&& aNode) { \
2470 /* We need the double-cast in case aNode is a smartptr. Those */ \
2471 /* can cast to superclasses of the type they're templated on, */ \
2472 /* but not directly to subclasses. */ \
2473 return aNode->_check ? static_cast<_class*>(static_cast<nsINode*>(aNode)) \
2476 template <typename T> \
2477 static _class* FromNodeOrNull(T&& aNode) { \
2478 return aNode ? FromNode(aNode) : nullptr; \
2480 template <typename T> \
2481 static _class* FromEventTarget(T&& aEventTarget) { \
2482 /* We need the double-cast in case aEventTarget is a smartptr. Those */ \
2483 /* can cast to superclasses of the type they're templated on, */ \
2484 /* but not directly to subclasses. */ \
2485 return aEventTarget->IsNode() && aEventTarget->AsNode()->_check \
2486 ? static_cast<_class*>(static_cast<EventTarget*>(aEventTarget)) \
2489 template <typename T> \
2490 static _class* FromEventTargetOrNull(T&& aEventTarget) { \
2491 return aEventTarget ? FromEventTarget(aEventTarget) : nullptr; \
2494 #define NS_IMPL_FROMNODE(_class, _nsid) \
2495 NS_IMPL_FROMNODE_HELPER(_class, IsInNamespace(_nsid))
2497 #define NS_IMPL_FROMNODE_WITH_TAG(_class, _nsid, _tag) \
2498 NS_IMPL_FROMNODE_HELPER(_class, NodeInfo()->Equals(nsGkAtoms::_tag, _nsid))
2500 #define NS_IMPL_FROMNODE_HTML_WITH_TAG(_class, _tag) \
2501 NS_IMPL_FROMNODE_WITH_TAG(_class, kNameSpaceID_XHTML, _tag)
2503 #endif /* nsINode_h___ */