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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsINode_h___
+#define nsINode_h___
+
+#include "mozilla/DoublyLinkedList.h"
+#include "mozilla/Likely.h"
+#include "mozilla/UniquePtr.h"
+#include "nsCOMPtr.h" // for member, local
+#include "nsGkAtoms.h" // for nsGkAtoms::baseURIProperty
+#include "mozilla/dom/NodeInfo.h" // member (in nsCOMPtr)
+#include "nsIWeakReference.h"
+#include "nsIMutationObserver.h"
+#include "nsNodeInfoManager.h" // for use in NodePrincipal()
+#include "nsPropertyTable.h" // for typedefs
+#include "mozilla/ErrorResult.h"
+#include "mozilla/LinkedList.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/dom/EventTarget.h" // for base class
+#include "js/TypeDecls.h" // for Handle, Value, JSObject, JSContext
+#include "mozilla/dom/DOMString.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/NodeBinding.h"
+#include "nsTHashtable.h"
+#include <iosfwd>
+
+// Including 'windows.h' will #define GetClassInfo to something else.
+#ifdef XP_WIN
+# ifdef GetClassInfo
+# undef GetClassInfo
+# endif
+#endif
+
+class AttrArray;
+class nsAttrChildContentList;
+template <typename T>
+class nsCOMArray;
+class nsDOMAttributeMap;
+class nsGenericHTMLElement;
+class nsIAnimationObserver;
+class nsIContent;
+class nsIContentSecurityPolicy;
+class nsIFrame;
+class nsIHTMLCollection;
+class nsMultiMutationObserver;
+class nsINode;
+class nsINodeList;
+class nsIPrincipal;
+class nsIURI;
+class nsNodeSupportsWeakRefTearoff;
+class nsDOMMutationObserver;
+class nsRange;
+class nsWindowSizes;
+
+namespace mozilla {
+class EventListenerManager;
+struct StyleSelectorList;
+template <typename T>
+class Maybe;
+class PresShell;
+class TextEditor;
+namespace dom {
+/**
+ * @return true if aChar is what the WHATWG defines as a 'ascii whitespace'.
+ * https://infra.spec.whatwg.org/#ascii-whitespace
+ */
+inline bool IsSpaceCharacter(char16_t aChar) {
+ return aChar == ' ' || aChar == '\t' || aChar == '\n' || aChar == '\r' ||
+ aChar == '\f';
+}
+inline bool IsSpaceCharacter(char aChar) {
+ return aChar == ' ' || aChar == '\t' || aChar == '\n' || aChar == '\r' ||
+ aChar == '\f';
+}
+class AbstractRange;
+class AccessibleNode;
+template <typename T>
+class AncestorsOfTypeIterator;
+struct BoxQuadOptions;
+struct ConvertCoordinateOptions;
+class DocGroup;
+class Document;
+class DocumentFragment;
+class DocumentOrShadowRoot;
+class DOMPoint;
+class DOMQuad;
+class DOMRectReadOnly;
+class Element;
+class EventHandlerNonNull;
+template <typename T>
+class FlatTreeAncestorsOfTypeIterator;
+template <typename T>
+class InclusiveAncestorsOfTypeIterator;
+template <typename T>
+class InclusiveFlatTreeAncestorsOfTypeIterator;
+class LinkStyle;
+class MutationObservers;
+template <typename T>
+class Optional;
+class OwningNodeOrString;
+template <typename>
+class Sequence;
+class ShadowRoot;
+class SVGUseElement;
+class Text;
+class TextOrElementOrDocument;
+struct DOMPointInit;
+struct GetRootNodeOptions;
+enum class CallerType : uint32_t;
+} // namespace dom
+} // namespace mozilla
+
+#define NODE_FLAG_BIT(n_) \
+ (nsWrapperCache::FlagsType(1U) << (WRAPPER_CACHE_FLAGS_BITS_USED + (n_)))
+
+enum : uint32_t {
+ // This bit will be set if the node has a listener manager.
+ NODE_HAS_LISTENERMANAGER = NODE_FLAG_BIT(0),
+
+ // Whether this node has had any properties set on it
+ NODE_HAS_PROPERTIES = NODE_FLAG_BIT(1),
+
+ // Whether the node has some ancestor, possibly itself, that is native
+ // anonymous. This includes ancestors crossing XBL scopes, in cases when an
+ // XBL binding is attached to an element which has a native anonymous
+ // ancestor. This flag is set-once: once a node has it, it must not be
+ // removed.
+ // NOTE: Should only be used on nsIContent nodes
+ NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE = NODE_FLAG_BIT(2),
+
+ // Whether this node is the root of a native anonymous (from the perspective
+ // of its parent) subtree. This flag is set-once: once a node has it, it
+ // must not be removed.
+ // NOTE: Should only be used on nsIContent nodes
+ NODE_IS_NATIVE_ANONYMOUS_ROOT = NODE_FLAG_BIT(3),
+
+ NODE_IS_EDITABLE = NODE_FLAG_BIT(4),
+
+ // Whether the node participates in a shadow tree.
+ NODE_IS_IN_SHADOW_TREE = NODE_FLAG_BIT(5),
+
+ // Node has an :empty or :-moz-only-whitespace selector
+ NODE_HAS_EMPTY_SELECTOR = NODE_FLAG_BIT(6),
+
+ // A child of the node has a selector such that any insertion,
+ // removal, or appending of children requires restyling the parent, if the
+ // parent is an element. If the parent is the shadow root, the child's
+ // siblings are restyled.
+ NODE_HAS_SLOW_SELECTOR = NODE_FLAG_BIT(7),
+
+ // A child of the node has a :first-child, :-moz-first-node,
+ // :only-child, :last-child or :-moz-last-node selector.
+ NODE_HAS_EDGE_CHILD_SELECTOR = NODE_FLAG_BIT(8),
+
+ // A child of the node has a selector such that any insertion or
+ // removal of children requires restyling later siblings of that
+ // element. Additionally (in this manner it is stronger than
+ // NODE_HAS_SLOW_SELECTOR), if a child's style changes due to any
+ // other content tree changes (e.g., the child changes to or from
+ // matching :empty due to a grandchild insertion or removal), the
+ // child's later siblings must also be restyled.
+ NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS = NODE_FLAG_BIT(9),
+
+ // A child of this node might be matched by :nth-child(.. of <selector>) or
+ // :nth-last-child(.. of <selector>). If a DOM mutation may have caused the
+ // selector to either match or no longer match that child, the child's
+ // siblings are restyled.
+ NODE_HAS_SLOW_SELECTOR_NTH_OF = NODE_FLAG_BIT(10),
+
+ // Set of selector flags that may trigger a restyle as a result of DOM
+ // mutation.
+ NODE_RESTYLE_SELECTOR_FLAGS =
+ NODE_HAS_EMPTY_SELECTOR | NODE_HAS_SLOW_SELECTOR |
+ NODE_HAS_EDGE_CHILD_SELECTOR | NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS |
+ NODE_HAS_SLOW_SELECTOR_NTH_OF,
+
+ // Set if this node tried anchoring a relative selector.
+ NODE_ANCHORS_RELATIVE_SELECTOR = NODE_FLAG_BIT(11),
+
+ // This node needs to go through frame construction to get a frame (or
+ // undisplayed entry).
+ NODE_NEEDS_FRAME = NODE_FLAG_BIT(12),
+
+ // At least one descendant in the flattened tree has NODE_NEEDS_FRAME set.
+ // This should be set on every node on the flattened tree path between the
+ // node(s) with NODE_NEEDS_FRAME and the root content.
+ NODE_DESCENDANTS_NEED_FRAMES = NODE_FLAG_BIT(13),
+
+ // Set if the node has the accesskey attribute set.
+ NODE_HAS_ACCESSKEY = NODE_FLAG_BIT(14),
+
+ // Set if the node has right-to-left directionality
+ NODE_HAS_DIRECTION_RTL = NODE_FLAG_BIT(15),
+
+ // Set if the node has left-to-right directionality
+ NODE_HAS_DIRECTION_LTR = NODE_FLAG_BIT(16),
+
+ NODE_ALL_DIRECTION_FLAGS = NODE_HAS_DIRECTION_LTR | NODE_HAS_DIRECTION_RTL,
+
+ NODE_HAS_BEEN_IN_UA_WIDGET = NODE_FLAG_BIT(17),
+
+ // Set if the node has a nonce value and a header delivered CSP.
+ NODE_HAS_NONCE_AND_HEADER_CSP = NODE_FLAG_BIT(18),
+
+ NODE_KEEPS_DOMARENA = NODE_FLAG_BIT(19),
+
+ NODE_MAY_HAVE_ELEMENT_CHILDREN = NODE_FLAG_BIT(20),
+
+ // Remaining bits are node type specific.
+ NODE_TYPE_SPECIFIC_BITS_OFFSET = 21
+};
+
+// Make sure we have space for our bits
+#define ASSERT_NODE_FLAGS_SPACE(n) \
+ static_assert(WRAPPER_CACHE_FLAGS_BITS_USED + (n) <= \
+ sizeof(nsWrapperCache::FlagsType) * 8, \
+ "Not enough space for our bits")
+ASSERT_NODE_FLAGS_SPACE(NODE_TYPE_SPECIFIC_BITS_OFFSET);
+
+/**
+ * Class used to detect unexpected mutations. To use the class create an
+ * nsMutationGuard on the stack before unexpected mutations could occur.
+ * You can then at any time call Mutated to check if any unexpected mutations
+ * have occurred.
+ */
+class nsMutationGuard {
+ public:
+ nsMutationGuard() { mStartingGeneration = sGeneration; }
+
+ /**
+ * Returns true if any unexpected mutations have occurred. You can pass in
+ * an 8-bit ignore count to ignore a number of expected mutations.
+ *
+ * We don't need to care about overflow because subtraction of uint64_t's is
+ * finding the difference between two elements of the group Z < 2^64. Once
+ * we know the difference between two elements we only need to check that is
+ * less than the given number of mutations to know less than that many
+ * mutations occured. Assuming constant 1ns mutations it would take 584
+ * years for sGeneration to fully wrap around so we can ignore a guard living
+ * through a full wrap around.
+ */
+ bool Mutated(uint8_t aIgnoreCount) {
+ return (sGeneration - mStartingGeneration) > aIgnoreCount;
+ }
+
+ // This function should be called whenever a mutation that we want to keep
+ // track of happen. For now this is only done when children are added or
+ // removed, but we might do it for attribute changes too in the future.
+ static void DidMutate() { sGeneration++; }
+
+ private:
+ // This is the value sGeneration had when the guard was constructed.
+ uint64_t mStartingGeneration;
+
+ // This value is incremented on every mutation, for the life of the process.
+ static uint64_t sGeneration;
+};
+
+/**
+ * A class that implements nsIWeakReference
+ */
+class nsNodeWeakReference final : public nsIWeakReference {
+ public:
+ explicit nsNodeWeakReference(nsINode* aNode);
+
+ // nsISupports
+ NS_DECL_ISUPPORTS
+
+ // nsIWeakReference
+ NS_DECL_NSIWEAKREFERENCE
+
+ void NoticeNodeDestruction() { mObject = nullptr; }
+
+ private:
+ ~nsNodeWeakReference();
+};
+
+// This should be used for any nsINode sub-class that has fields of its own
+// that it needs to measure; any sub-class that doesn't use it will inherit
+// AddSizeOfExcludingThis from its super-class. AddSizeOfIncludingThis() need
+// not be defined, it is inherited from nsINode.
+#define NS_DECL_ADDSIZEOFEXCLUDINGTHIS \
+ virtual void AddSizeOfExcludingThis(nsWindowSizes& aSizes, \
+ size_t* aNodeSize) const override;
+
+// IID for the nsINode interface
+// Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs
+#define NS_INODE_IID \
+ { \
+ 0x70ba4547, 0x7699, 0x44fc, { \
+ 0xb3, 0x20, 0x52, 0xdb, 0xe3, 0xd1, 0xf9, 0x0a \
+ } \
+ }
+
+/**
+ * An internal interface that abstracts some DOMNode-related parts that both
+ * nsIContent and Document share. An instance of this interface has a list
+ * of nsIContent children and provides access to them.
+ */
+class nsINode : public mozilla::dom::EventTarget {
+#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
+ void AssertInvariantsOnNodeInfoChange();
+#endif
+ public:
+ using BoxQuadOptions = mozilla::dom::BoxQuadOptions;
+ using ConvertCoordinateOptions = mozilla::dom::ConvertCoordinateOptions;
+ using DocGroup = mozilla::dom::DocGroup;
+ using Document = mozilla::dom::Document;
+ using DOMPoint = mozilla::dom::DOMPoint;
+ using DOMPointInit = mozilla::dom::DOMPointInit;
+ using DOMQuad = mozilla::dom::DOMQuad;
+ using DOMRectReadOnly = mozilla::dom::DOMRectReadOnly;
+ using OwningNodeOrString = mozilla::dom::OwningNodeOrString;
+ using TextOrElementOrDocument = mozilla::dom::TextOrElementOrDocument;
+ using CallerType = mozilla::dom::CallerType;
+ using ErrorResult = mozilla::ErrorResult;
+
+ // XXXbz Maybe we should codegen a class holding these constants and
+ // inherit from it...
+ static const auto ELEMENT_NODE = mozilla::dom::Node_Binding::ELEMENT_NODE;
+ static const auto ATTRIBUTE_NODE = mozilla::dom::Node_Binding::ATTRIBUTE_NODE;
+ static const auto TEXT_NODE = mozilla::dom::Node_Binding::TEXT_NODE;
+ static const auto CDATA_SECTION_NODE =
+ mozilla::dom::Node_Binding::CDATA_SECTION_NODE;
+ static const auto ENTITY_REFERENCE_NODE =
+ mozilla::dom::Node_Binding::ENTITY_REFERENCE_NODE;
+ static const auto ENTITY_NODE = mozilla::dom::Node_Binding::ENTITY_NODE;
+ static const auto PROCESSING_INSTRUCTION_NODE =
+ mozilla::dom::Node_Binding::PROCESSING_INSTRUCTION_NODE;
+ static const auto COMMENT_NODE = mozilla::dom::Node_Binding::COMMENT_NODE;
+ static const auto DOCUMENT_NODE = mozilla::dom::Node_Binding::DOCUMENT_NODE;
+ static const auto DOCUMENT_TYPE_NODE =
+ mozilla::dom::Node_Binding::DOCUMENT_TYPE_NODE;
+ static const auto DOCUMENT_FRAGMENT_NODE =
+ mozilla::dom::Node_Binding::DOCUMENT_FRAGMENT_NODE;
+ static const auto NOTATION_NODE = mozilla::dom::Node_Binding::NOTATION_NODE;
+ static const auto MAX_NODE_TYPE = NOTATION_NODE;
+
+ void* operator new(size_t aSize, nsNodeInfoManager* aManager);
+ void* operator new(size_t aSize) = delete;
+ void operator delete(void* aPtr);
+
+ template <class T>
+ using Sequence = mozilla::dom::Sequence<T>;
+
+ NS_DECLARE_STATIC_IID_ACCESSOR(NS_INODE_IID)
+
+ // The |aNodeSize| outparam on this function is where the actual node size
+ // value is put. It gets added to the appropriate value within |aSizes| by
+ // AddSizeOfNodeTree().
+ //
+ // Among the sub-classes that inherit (directly or indirectly) from nsINode,
+ // measurement of the following members may be added later if DMD finds it is
+ // worthwhile:
+ // - nsGenericHTMLElement: mForm, mFieldSet
+ // - nsGenericHTMLFrameElement: mFrameLoader (bug 672539)
+ // - HTMLBodyElement: mContentStyleRule
+ // - HTMLDataListElement: mOptions
+ // - HTMLFieldSetElement: mElements, mDependentElements, mFirstLegend
+ // - HTMLFormElement: many!
+ // - HTMLFrameSetElement: mRowSpecs, mColSpecs
+ // - HTMLInputElement: mInputData, mFiles, mFileList, mStaticDocfileList
+ // - nsHTMLMapElement: mAreas
+ // - HTMLMediaElement: many!
+ // - nsHTMLOutputElement: mDefaultValue, mTokenList
+ // - nsHTMLRowElement: mCells
+ // - nsHTMLSelectElement: mOptions, mRestoreState
+ // - nsHTMLTableElement: mTBodies, mRows, mTableInheritedAttributes
+ // - nsHTMLTableSectionElement: mRows
+ // - nsHTMLTextAreaElement: mControllers, mState
+ //
+ // The following members don't need to be measured:
+ // - nsIContent: mPrimaryFrame, because it's non-owning and measured elsewhere
+ //
+ virtual void AddSizeOfExcludingThis(nsWindowSizes& aSizes,
+ size_t* aNodeSize) const;
+
+ // SizeOfIncludingThis doesn't need to be overridden by sub-classes because
+ // sub-classes of nsINode are guaranteed to be laid out in memory in such a
+ // way that |this| points to the start of the allocated object, even in
+ // methods of nsINode's sub-classes, so aSizes.mState.mMallocSizeOf(this) is
+ // always safe to call no matter which object it was invoked on.
+ void AddSizeOfIncludingThis(nsWindowSizes& aSizes, size_t* aNodeSize) const;
+
+ friend class nsNodeWeakReference;
+ friend class nsNodeSupportsWeakRefTearoff;
+ friend class AttrArray;
+
+#ifdef MOZILLA_INTERNAL_API
+ explicit nsINode(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
+#endif
+
+ virtual ~nsINode();
+
+ bool IsContainerNode() const {
+ return IsElement() || IsDocument() || IsDocumentFragment();
+ }
+
+ /**
+ * Returns true if the node is a HTMLTemplate element.
+ */
+ bool IsTemplateElement() const { return IsHTMLElement(nsGkAtoms::_template); }
+
+ bool IsSlotable() const { return IsElement() || IsText(); }
+
+ /**
+ * Returns true if this is a document node.
+ */
+ bool IsDocument() const {
+ // One less pointer-chase than checking NodeType().
+ return !GetParentNode() && IsInUncomposedDoc();
+ }
+
+ /**
+ * Return this node as a document. Asserts IsDocument().
+ *
+ * This is defined inline in Document.h.
+ */
+ inline Document* AsDocument();
+ inline const Document* AsDocument() const;
+
+ /**
+ * Returns true if this is a document fragment node.
+ */
+ bool IsDocumentFragment() const {
+ return NodeType() == DOCUMENT_FRAGMENT_NODE;
+ }
+
+ virtual bool IsHTMLFormControlElement() const { return false; }
+
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-descendant
+ *
+ * @param aNode must not be nullptr.
+ */
+ bool IsInclusiveDescendantOf(const nsINode* aNode) const;
+
+ /**
+ * https://dom.spec.whatwg.org/#concept-shadow-including-inclusive-descendant
+ *
+ * @param aNode must not be nullptr.
+ */
+ bool IsShadowIncludingInclusiveDescendantOf(const nsINode* aNode) const;
+
+ /**
+ * Returns true if the given node is this node or one of its descendants
+ * in the "flat tree."
+ *
+ * @param aNode must not be nullptr.
+ */
+ bool IsInclusiveFlatTreeDescendantOf(const nsINode* aNode) const;
+
+ /**
+ * Return this node as a document fragment. Asserts IsDocumentFragment().
+ *
+ * This is defined inline in DocumentFragment.h.
+ */
+ inline mozilla::dom::DocumentFragment* AsDocumentFragment();
+ inline const mozilla::dom::DocumentFragment* AsDocumentFragment() const;
+
+ JSObject* WrapObject(JSContext*, JS::Handle<JSObject*> aGivenProto) final;
+
+ /**
+ * Hook for constructing JS::ubi::Concrete specializations for memory
+ * reporting. Specializations are defined in NodeUbiReporting.h.
+ */
+ virtual void ConstructUbiNode(void* storage) = 0;
+
+ /**
+ * returns true if we are in priviliged code or
+ * layout.css.getBoxQuads.enabled == true.
+ */
+ static bool HasBoxQuadsSupport(JSContext* aCx, JSObject* /* unused */);
+
+ protected:
+ /**
+ * WrapNode is called from WrapObject to actually wrap this node, WrapObject
+ * does some additional checks and fix-up that's common to all nodes. WrapNode
+ * should just call the DOM binding's Wrap function.
+ *
+ * aGivenProto is the prototype to use (or null if the default one should be
+ * used) and should just be passed directly on to the DOM binding's Wrap
+ * function.
+ */
+ virtual JSObject* WrapNode(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) = 0;
+
+ public:
+ mozilla::dom::ParentObject GetParentObject()
+ const; // Implemented in Document.h
+
+ /**
+ * Returns the first child of a node or the first child of
+ * a template element's content if the provided node is a
+ * template element.
+ */
+ nsIContent* GetFirstChildOfTemplateOrNode();
+
+ /**
+ * Return the scope chain parent for this node, for use in things
+ * like event handler compilation. Returning null means to use the
+ * global object as the scope chain parent.
+ */
+ virtual nsINode* GetScopeChainParent() const;
+
+ MOZ_CAN_RUN_SCRIPT mozilla::dom::Element* GetParentFlexElement();
+
+ /**
+ * Returns the nearest inclusive open popover for a given node, see
+ * https://html.spec.whatwg.org/multipage/popover.html#nearest-inclusive-open-popover
+ */
+ mozilla::dom::Element* GetNearestInclusiveOpenPopover() const;
+
+ /**
+ * https://html.spec.whatwg.org/multipage/popover.html#nearest-inclusive-target-popover-for-invoker
+ */
+ mozilla::dom::Element* GetNearestInclusiveTargetPopoverForInvoker() const;
+
+ /**
+ * https://html.spec.whatwg.org/multipage/popover.html#popover-target-element
+ */
+ nsGenericHTMLElement* GetEffectivePopoverTargetElement() const;
+
+ /**
+ * https://html.spec.whatwg.org/multipage/popover.html#topmost-clicked-popover
+ */
+ mozilla::dom::Element* GetTopmostClickedPopover() const;
+
+ bool IsNode() const final { return true; }
+
+ NS_IMPL_FROMEVENTTARGET_HELPER(nsINode, IsNode())
+
+ /**
+ * Return whether the node is an Element node. Faster than using `NodeType()`.
+ */
+ bool IsElement() const { return GetBoolFlag(NodeIsElement); }
+
+ virtual bool IsTextControlElement() const { return false; }
+ virtual bool IsGenericHTMLFormControlElementWithState() const {
+ return false;
+ }
+
+ // Returns non-null if this element subclasses `LinkStyle`.
+ virtual const mozilla::dom::LinkStyle* AsLinkStyle() const { return nullptr; }
+ mozilla::dom::LinkStyle* AsLinkStyle() {
+ return const_cast<mozilla::dom::LinkStyle*>(
+ static_cast<const nsINode*>(this)->AsLinkStyle());
+ }
+
+ /**
+ * Return this node as an Element. Should only be used for nodes
+ * for which IsElement() is true. This is defined inline in Element.h.
+ */
+ inline mozilla::dom::Element* AsElement();
+ inline const mozilla::dom::Element* AsElement() const;
+
+ /**
+ * Return whether the node is an nsStyledElement instance or not.
+ */
+ virtual bool IsStyledElement() const { return false; }
+
+ /**
+ * Return this node as nsIContent. Should only be used for nodes for which
+ * IsContent() is true.
+ *
+ * The assertion in nsIContent's constructor makes this safe.
+ */
+ nsIContent* AsContent() {
+ MOZ_ASSERT(IsContent());
+ return reinterpret_cast<nsIContent*>(this);
+ }
+ const nsIContent* AsContent() const {
+ MOZ_ASSERT(IsContent());
+ return reinterpret_cast<const nsIContent*>(this);
+ }
+
+ /*
+ * Return whether the node is a Text node (which might be an actual
+ * textnode, or might be a CDATA section).
+ */
+ bool IsText() const {
+ uint32_t nodeType = NodeType();
+ return nodeType == TEXT_NODE || nodeType == CDATA_SECTION_NODE;
+ }
+
+ /**
+ * Return this node as Text if it is one, otherwise null. This is defined
+ * inline in Text.h.
+ */
+ inline mozilla::dom::Text* GetAsText();
+ inline const mozilla::dom::Text* GetAsText() const;
+
+ /**
+ * Return this node as Text. Asserts IsText(). This is defined inline in
+ * Text.h.
+ */
+ inline mozilla::dom::Text* AsText();
+ inline const mozilla::dom::Text* AsText() const;
+
+ /*
+ * Return whether the node is a ProcessingInstruction node.
+ */
+ bool IsProcessingInstruction() const {
+ return NodeType() == PROCESSING_INSTRUCTION_NODE;
+ }
+
+ /*
+ * Return whether the node is a CharacterData node (text, cdata,
+ * comment, processing instruction)
+ */
+ bool IsCharacterData() const {
+ uint32_t nodeType = NodeType();
+ return nodeType == TEXT_NODE || nodeType == CDATA_SECTION_NODE ||
+ nodeType == PROCESSING_INSTRUCTION_NODE || nodeType == COMMENT_NODE;
+ }
+
+ /**
+ * Return whether the node is a Comment node.
+ */
+ bool IsComment() const { return NodeType() == COMMENT_NODE; }
+
+ /**
+ * Return whether the node is an Attr node.
+ */
+ bool IsAttr() const { return NodeType() == ATTRIBUTE_NODE; }
+
+ /**
+ * Return if this node has any children.
+ */
+ bool HasChildren() const { return !!mFirstChild; }
+
+ /**
+ * Get the number of children
+ * @return the number of children
+ */
+ uint32_t GetChildCount() const { return mChildCount; }
+
+ /**
+ * NOTE: this function is going to be removed soon (hopefully!) Don't use it
+ * in new code.
+ *
+ * Get a child by index
+ * @param aIndex the index of the child to get
+ * @return the child, or null if index out of bounds
+ */
+ nsIContent* GetChildAt_Deprecated(uint32_t aIndex) const;
+
+ /**
+ * Get the index of a child within this content.
+ *
+ * @param aPossibleChild the child to get the index of.
+ * @return the index of the child, or Nothing if not a child. Be aware that
+ * anonymous children (e.g. a <div> child of an <input> element) will
+ * result in Nothing.
+ *
+ * If the return value is Some, then calling GetChildAt_Deprecated() with
+ * that value will return aPossibleChild.
+ */
+ mozilla::Maybe<uint32_t> ComputeIndexOf(const nsINode* aPossibleChild) const;
+
+ /**
+ * Get the index of this within parent node (ComputeIndexInParentNode) or
+ * parent content (nsIContent) node (ComputeIndexInParentContent).
+ *
+ * @return the index of this node in the parent, or Nothing there is no
+ * parent (content) node or the parent does not have this node anymore
+ * (e.g., being removed from the parent). Be aware that anonymous
+ * children (e.g. a <div> child of an <input> element) will result in
+ * Nothing.
+ *
+ * If the return value is Some, then calling GetChildAt_Deprecated() with
+ * that value will return this.
+ */
+ mozilla::Maybe<uint32_t> ComputeIndexInParentNode() const;
+ mozilla::Maybe<uint32_t> ComputeIndexInParentContent() const;
+
+ /**
+ * Get the index of a child within this content.
+ *
+ * @param aPossibleChild the child to get the index of.
+ * @return the index of the child, or -1 if not a child. Be aware that
+ * anonymous children (e.g. a <div> child of an <input> element) will
+ * result in -1.
+ *
+ * If the return value is not -1, then calling GetChildAt_Deprecated() with
+ * that value will return aPossibleChild.
+ */
+ int32_t ComputeIndexOf_Deprecated(const nsINode* aPossibleChild) const;
+
+ /**
+ * Returns the "node document" of this node.
+ *
+ * https://dom.spec.whatwg.org/#concept-node-document
+ *
+ * Note that in the case that this node is a document node this method
+ * will return |this|. That is different to the Node.ownerDocument DOM
+ * attribute (implemented by nsINode::GetOwnerDocument) which is specified to
+ * be null in that case:
+ *
+ * https://dom.spec.whatwg.org/#dom-node-ownerdocument
+ *
+ * For all other cases OwnerDoc and GetOwnerDocument behave identically.
+ */
+ Document* OwnerDoc() const MOZ_NONNULL_RETURN {
+ return mNodeInfo->GetDocument();
+ }
+
+ /**
+ * Return the "owner document" of this node as an nsINode*. Implemented
+ * in Document.h.
+ */
+ inline nsINode* OwnerDocAsNode() const MOZ_NONNULL_RETURN;
+
+ /**
+ * Returns true if the content has an ancestor that is a document.
+ *
+ * @return whether this content is in a document tree
+ */
+ bool IsInUncomposedDoc() const { return GetBoolFlag(IsInDocument); }
+
+ /**
+ * Get the document that this content is currently in, if any. This will be
+ * null if the content has no ancestor that is a document.
+ *
+ * @return the current document
+ */
+
+ Document* GetUncomposedDoc() const {
+ return IsInUncomposedDoc() ? OwnerDoc() : nullptr;
+ }
+
+ /**
+ * Returns true if we're connected, and thus GetComposedDoc() would return a
+ * non-null value.
+ */
+ bool IsInComposedDoc() const { return GetBoolFlag(IsConnected); }
+
+ /**
+ * This method returns the owner document if the node is connected to it
+ * (as defined in the DOM spec), otherwise it returns null.
+ * In other words, returns non-null even in the case the node is in
+ * Shadow DOM, if there is a possibly shadow boundary crossing path from
+ * the node to its owner document.
+ */
+ Document* GetComposedDoc() const {
+ return IsInComposedDoc() ? OwnerDoc() : nullptr;
+ }
+
+ /**
+ * Returns OwnerDoc() if the node is in uncomposed document and ShadowRoot if
+ * the node is in Shadow DOM.
+ */
+ mozilla::dom::DocumentOrShadowRoot* GetContainingDocumentOrShadowRoot() const;
+
+ /**
+ * Returns OwnerDoc() if the node is in uncomposed document and ShadowRoot if
+ * the node is in Shadow DOM and is in composed document.
+ */
+ mozilla::dom::DocumentOrShadowRoot* GetUncomposedDocOrConnectedShadowRoot()
+ const;
+
+ /**
+ * To be called when reference count of the node drops to zero.
+ */
+ void LastRelease();
+
+ /**
+ * The values returned by this function are the ones defined for
+ * Node.nodeType
+ */
+ uint16_t NodeType() const { return mNodeInfo->NodeType(); }
+ const nsString& NodeName() const { return mNodeInfo->NodeName(); }
+ const nsString& LocalName() const { return mNodeInfo->LocalName(); }
+
+ /**
+ * Get the NodeInfo for this element
+ * @return the nodes node info
+ */
+ inline mozilla::dom::NodeInfo* NodeInfo() const { return mNodeInfo; }
+
+ /**
+ * Called when we have been adopted, and the information of the
+ * node has been changed.
+ *
+ * The new document can be reached via OwnerDoc().
+ *
+ * If you override this method,
+ * please call up to the parent NodeInfoChanged.
+ *
+ * If you change this, change also the similar method in Link.
+ */
+ virtual void NodeInfoChanged(Document* aOldDoc) {
+#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
+ AssertInvariantsOnNodeInfoChange();
+#endif
+ }
+
+ inline bool IsInNamespace(int32_t aNamespace) const {
+ return mNodeInfo->NamespaceID() == aNamespace;
+ }
+
+ /**
+ * Returns the DocGroup of the "node document" of this node.
+ */
+ DocGroup* GetDocGroup() const;
+
+ /**
+ * Print a debugger friendly descriptor of this element. This will describe
+ * the position of this element in the document.
+ */
+ friend std::ostream& operator<<(std::ostream& aStream, const nsINode& aNode);
+
+ protected:
+ // These 2 methods are useful for the recursive templates IsHTMLElement,
+ // IsSVGElement, etc.
+ inline bool IsNodeInternal() const { return false; }
+
+ template <typename First, typename... Args>
+ inline bool IsNodeInternal(First aFirst, Args... aArgs) const {
+ return mNodeInfo->Equals(aFirst) || IsNodeInternal(aArgs...);
+ }
+
+ public:
+ inline bool IsHTMLElement() const {
+ return IsElement() && IsInNamespace(kNameSpaceID_XHTML);
+ }
+
+ inline bool IsHTMLElement(const nsAtom* aTag) const {
+ return IsElement() && mNodeInfo->Equals(aTag, kNameSpaceID_XHTML);
+ }
+
+ template <typename First, typename... Args>
+ inline bool IsAnyOfHTMLElements(First aFirst, Args... aArgs) const {
+ return IsHTMLElement() && IsNodeInternal(aFirst, aArgs...);
+ }
+
+ inline bool IsSVGElement() const {
+ return IsElement() && IsInNamespace(kNameSpaceID_SVG);
+ }
+
+ inline bool IsSVGElement(const nsAtom* aTag) const {
+ return IsElement() && mNodeInfo->Equals(aTag, kNameSpaceID_SVG);
+ }
+
+ template <typename First, typename... Args>
+ inline bool IsAnyOfSVGElements(First aFirst, Args... aArgs) const {
+ return IsSVGElement() && IsNodeInternal(aFirst, aArgs...);
+ }
+
+ virtual bool IsSVGAnimationElement() const { return false; }
+ virtual bool IsSVGGeometryElement() const { return false; }
+ virtual bool IsSVGGraphicsElement() const { return false; }
+
+ inline bool IsXULElement() const {
+ return IsElement() && IsInNamespace(kNameSpaceID_XUL);
+ }
+
+ inline bool IsXULElement(const nsAtom* aTag) const {
+ return IsElement() && mNodeInfo->Equals(aTag, kNameSpaceID_XUL);
+ }
+
+ template <typename First, typename... Args>
+ inline bool IsAnyOfXULElements(First aFirst, Args... aArgs) const {
+ return IsXULElement() && IsNodeInternal(aFirst, aArgs...);
+ }
+
+ inline bool IsMathMLElement() const {
+ return IsElement() && IsInNamespace(kNameSpaceID_MathML);
+ }
+
+ inline bool IsMathMLElement(const nsAtom* aTag) const {
+ return IsElement() && mNodeInfo->Equals(aTag, kNameSpaceID_MathML);
+ }
+
+ template <typename First, typename... Args>
+ inline bool IsAnyOfMathMLElements(First aFirst, Args... aArgs) const {
+ return IsMathMLElement() && IsNodeInternal(aFirst, aArgs...);
+ }
+
+ bool IsShadowRoot() const {
+ const bool isShadowRoot = IsInShadowTree() && !GetParentNode();
+ MOZ_ASSERT_IF(isShadowRoot, IsDocumentFragment());
+ return isShadowRoot;
+ }
+
+ bool IsHTMLHeadingElement() const {
+ return IsAnyOfHTMLElements(nsGkAtoms::h1, nsGkAtoms::h2, nsGkAtoms::h3,
+ nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6);
+ }
+
+ /**
+ * Insert a content node before another or at the end.
+ * This method handles calling BindToTree on the child appropriately.
+ *
+ * @param aKid the content to insert
+ * @param aBeforeThis an existing node. Use nullptr if you want to
+ * add aKid at the end.
+ * @param aNotify whether to notify the document (current document for
+ * nsIContent, and |this| for Document) that the insert has occurred
+ * @param aRv The error, if any.
+ * Throw NS_ERROR_DOM_HIERARCHY_REQUEST_ERR if one attempts to have
+ * more than one element node as a child of a document. Doing this
+ * will also assert -- you shouldn't be doing it! Check with
+ * Document::GetRootElement() first if you're not sure. Apart from
+ * this one constraint, this doesn't do any checking on whether aKid is
+ * a valid child of |this|.
+ * Throw NS_ERROR_OUT_OF_MEMORY in some cases (from BindToTree).
+ */
+ virtual void InsertChildBefore(nsIContent* aKid, nsIContent* aBeforeThis,
+ bool aNotify, mozilla::ErrorResult& aRv);
+
+ /**
+ * Append a content node to the end of the child list. This method handles
+ * calling BindToTree on the child appropriately.
+ *
+ * @param aKid the content to append
+ * @param aNotify whether to notify the document (current document for
+ * nsIContent, and |this| for Document) that the append has occurred
+ * @param aRv The error, if any.
+ * Throw NS_ERROR_DOM_HIERARCHY_REQUEST_ERR if one attempts to have
+ * more than one element node as a child of a document. Doing this
+ * will also assert -- you shouldn't be doing it! Check with
+ * Document::GetRootElement() first if you're not sure. Apart from
+ * this one constraint, this doesn't do any checking on whether aKid is
+ * a valid child of |this|.
+ * Throw NS_ERROR_OUT_OF_MEMORY in some cases (from BindToTree).
+ */
+ void AppendChildTo(nsIContent* aKid, bool aNotify,
+ mozilla::ErrorResult& aRv) {
+ InsertChildBefore(aKid, nullptr, aNotify, aRv);
+ }
+
+ /**
+ * Remove a child from this node. This method handles calling UnbindFromTree
+ * on the child appropriately.
+ *
+ * @param aKid the content to remove
+ * @param aNotify whether to notify the document (current document for
+ * nsIContent, and |this| for Document) that the remove has occurred
+ */
+ virtual void RemoveChildNode(nsIContent* aKid, bool aNotify);
+
+ /**
+ * Get a property associated with this node.
+ *
+ * @param aPropertyName name of property to get.
+ * @param aStatus out parameter for storing resulting status.
+ * Set to NS_PROPTABLE_PROP_NOT_THERE if the property
+ * is not set.
+ * @return the property. Null if the property is not set
+ * (though a null return value does not imply the
+ * property was not set, i.e. it can be set to null).
+ */
+ void* GetProperty(const nsAtom* aPropertyName,
+ nsresult* aStatus = nullptr) const;
+
+ /**
+ * Set a property to be associated with this node. This will overwrite an
+ * existing value if one exists. The existing value is destroyed using the
+ * destructor function given when that value was set.
+ *
+ * @param aPropertyName name of property to set.
+ * @param aValue new value of property.
+ * @param aDtor destructor function to be used when this property
+ * is destroyed.
+ * @param aTransfer if true the property will not be deleted when the
+ * ownerDocument of the node changes, if false it
+ * will be deleted.
+ *
+ * @return NS_PROPTABLE_PROP_OVERWRITTEN (success value) if the property
+ * was already set
+ * @throws NS_ERROR_OUT_OF_MEMORY if that occurs
+ */
+ nsresult SetProperty(nsAtom* aPropertyName, void* aValue,
+ NSPropertyDtorFunc aDtor = nullptr,
+ bool aTransfer = false);
+
+ /**
+ * A generic destructor for property values allocated with new.
+ */
+ template <class T>
+ static void DeleteProperty(void*, nsAtom*, void* aPropertyValue, void*) {
+ delete static_cast<T*>(aPropertyValue);
+ }
+
+ /**
+ * Removes a property associated with this node. The value is destroyed using
+ * the destruction function given when that value was set.
+ *
+ * @param aPropertyName name of property to destroy.
+ */
+ void RemoveProperty(const nsAtom* aPropertyName);
+
+ /**
+ * Take a property associated with this node. The value will not be destroyed
+ * but rather returned. It is the caller's responsibility to destroy the value
+ * after that point.
+ *
+ * @param aPropertyName name of property to unset.
+ * @param aStatus out parameter for storing resulting status.
+ * Set to NS_PROPTABLE_PROP_NOT_THERE if the property
+ * is not set.
+ * @return the property. Null if the property is not set
+ * (though a null return value does not imply the
+ * property was not set, i.e. it can be set to null).
+ */
+ void* TakeProperty(const nsAtom* aPropertyName, nsresult* aStatus = nullptr);
+
+ bool HasProperties() const { return HasFlag(NODE_HAS_PROPERTIES); }
+
+ /**
+ * Return the principal of this node. This is guaranteed to never be a null
+ * pointer.
+ */
+ nsIPrincipal* NodePrincipal() const {
+ return mNodeInfo->NodeInfoManager()->DocumentPrincipal();
+ }
+
+ /**
+ * Return the CSP of this node's document, if any.
+ */
+ nsIContentSecurityPolicy* GetCsp() const;
+
+ /**
+ * Get the parent nsIContent for this node.
+ * @return the parent, or null if no parent or the parent is not an nsIContent
+ */
+ nsIContent* GetParent() const {
+ return MOZ_LIKELY(GetBoolFlag(ParentIsContent)) ? mParent->AsContent()
+ : nullptr;
+ }
+
+ /**
+ * Get the parent nsINode for this node. This can be either an nsIContent, a
+ * Document or an Attr.
+ * @return the parent node
+ */
+ nsINode* GetParentNode() const { return mParent; }
+
+ private:
+ nsIContent* DoGetShadowHost() const;
+
+ public:
+ nsINode* GetParentOrShadowHostNode() const {
+ if (MOZ_LIKELY(mParent)) {
+ return mParent;
+ }
+ // We could put this in nsIContentInlines.h or such to avoid this
+ // reinterpret_cast, but it doesn't seem worth it.
+ return IsInShadowTree() ? reinterpret_cast<nsINode*>(DoGetShadowHost())
+ : nullptr;
+ }
+
+ enum FlattenedParentType { eNotForStyle, eForStyle };
+
+ /**
+ * Returns the node that is the parent of this node in the flattened
+ * tree. This differs from the normal parent if the node is filtered
+ * into an insertion point, or if the node is a direct child of a
+ * shadow root.
+ *
+ * @return the flattened tree parent
+ */
+ inline nsINode* GetFlattenedTreeParentNode() const;
+
+ nsINode* GetFlattenedTreeParentNodeNonInline() const;
+
+ /**
+ * Like GetFlattenedTreeParentNode, but returns the document for any native
+ * anonymous content that was generated for ancestor frames of the document
+ * element's primary frame, such as scrollbar elements created by the root
+ * scroll frame.
+ */
+ inline nsINode* GetFlattenedTreeParentNodeForStyle() const;
+
+ inline mozilla::dom::Element* GetFlattenedTreeParentElement() const;
+ inline mozilla::dom::Element* GetFlattenedTreeParentElementForStyle() const;
+
+ /**
+ * Get the parent nsINode for this node if it is an Element.
+ *
+ * Defined inline in Element.h
+ *
+ * @return the parent node
+ */
+ inline mozilla::dom::Element* GetParentElement() const;
+
+ /**
+ * Get the parent Element of this node, traversing over a ShadowRoot
+ * to its host if necessary.
+ */
+ mozilla::dom::Element* GetParentElementCrossingShadowRoot() const;
+
+ /**
+ * Get closest element node for the node. Meaning that if the node is an
+ * element node, returns itself. Otherwise, returns parent element or null.
+ */
+ inline mozilla::dom::Element* GetAsElementOrParentElement() const;
+
+ /**
+ * Get the root of the subtree this node belongs to. This never returns
+ * null. It may return 'this' (e.g. for document nodes, and nodes that
+ * are the roots of disconnected subtrees).
+ */
+ nsINode* SubtreeRoot() const;
+
+ /*
+ * Get context object's shadow-including root if options's composed is true,
+ * and context object's root otherwise.
+ */
+ nsINode* GetRootNode(const mozilla::dom::GetRootNodeOptions& aOptions);
+
+ virtual mozilla::EventListenerManager* GetExistingListenerManager()
+ const override;
+ virtual mozilla::EventListenerManager* GetOrCreateListenerManager() override;
+
+ mozilla::Maybe<mozilla::dom::EventCallbackDebuggerNotificationType>
+ GetDebuggerNotificationType() const override;
+
+ bool ComputeDefaultWantsUntrusted(mozilla::ErrorResult& aRv) final;
+
+ virtual bool IsApzAware() const override;
+
+ virtual nsPIDOMWindowOuter* GetOwnerGlobalForBindingsInternal() override;
+ virtual nsIGlobalObject* GetOwnerGlobal() const override;
+
+ using mozilla::dom::EventTarget::DispatchEvent;
+ // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY bool DispatchEvent(
+ mozilla::dom::Event& aEvent, mozilla::dom::CallerType aCallerType,
+ mozilla::ErrorResult& aRv) override;
+
+ MOZ_CAN_RUN_SCRIPT
+ nsresult PostHandleEvent(mozilla::EventChainPostVisitor& aVisitor) override;
+
+ /**
+ * Adds a mutation observer to be notified when this node, or any of its
+ * descendants, are modified. The node will hold a weak reference to the
+ * observer, which means that it is the responsibility of the observer to
+ * remove itself in case it dies before the node. If an observer is added
+ * while observers are being notified, it may also be notified. In general,
+ * adding observers while inside a notification is not a good idea. An
+ * observer that is already observing the node must not be added without
+ * being removed first.
+ *
+ * For mutation observers that implement nsIAnimationObserver, use
+ * AddAnimationObserver instead.
+ */
+ void AddMutationObserver(nsIMutationObserver* aMutationObserver) {
+ nsSlots* s = Slots();
+ if (aMutationObserver) {
+ NS_ASSERTION(!s->mMutationObservers.contains(aMutationObserver),
+ "Observer already in the list");
+
+ s->mMutationObservers.pushBack(aMutationObserver);
+ }
+ }
+
+ void AddMutationObserver(nsMultiMutationObserver* aMultiMutationObserver);
+
+ /**
+ * Same as above, but only adds the observer if its not observing
+ * the node already.
+ *
+ * For mutation observers that implement nsIAnimationObserver, use
+ * AddAnimationObserverUnlessExists instead.
+ */
+ void AddMutationObserverUnlessExists(nsIMutationObserver* aMutationObserver) {
+ nsSlots* s = Slots();
+ if (aMutationObserver &&
+ !s->mMutationObservers.contains(aMutationObserver)) {
+ s->mMutationObservers.pushBack(aMutationObserver);
+ }
+ }
+
+ void AddMutationObserverUnlessExists(
+ nsMultiMutationObserver* aMultiMutationObserver);
+ /**
+ * Same as AddMutationObserver, but for nsIAnimationObservers. This
+ * additionally records on the document that animation observers have
+ * been registered, which is used to determine whether notifications
+ * must be fired when animations are added, removed or changed.
+ */
+ void AddAnimationObserver(nsIAnimationObserver* aAnimationObserver);
+
+ /**
+ * Same as above, but only adds the observer if its not observing
+ * the node already.
+ */
+ void AddAnimationObserverUnlessExists(
+ nsIAnimationObserver* aAnimationObserver);
+
+ /**
+ * Removes a mutation observer.
+ */
+ void RemoveMutationObserver(nsIMutationObserver* aMutationObserver) {
+ nsSlots* s = GetExistingSlots();
+ if (s) {
+ s->mMutationObservers.remove(aMutationObserver);
+ }
+ }
+
+ void RemoveMutationObserver(nsMultiMutationObserver* aMultiMutationObserver);
+
+ mozilla::SafeDoublyLinkedList<nsIMutationObserver>* GetMutationObservers();
+
+ /**
+ * Helper methods to access ancestor node(s) of type T.
+ * The implementations of the methods are in mozilla/dom/AncestorIterator.h.
+ */
+ template <typename T>
+ inline mozilla::dom::AncestorsOfTypeIterator<T> AncestorsOfType() const;
+
+ template <typename T>
+ inline mozilla::dom::InclusiveAncestorsOfTypeIterator<T>
+ InclusiveAncestorsOfType() const;
+
+ template <typename T>
+ inline mozilla::dom::FlatTreeAncestorsOfTypeIterator<T>
+ FlatTreeAncestorsOfType() const;
+
+ template <typename T>
+ inline mozilla::dom::InclusiveFlatTreeAncestorsOfTypeIterator<T>
+ InclusiveFlatTreeAncestorsOfType() const;
+
+ template <typename T>
+ T* FirstAncestorOfType() const;
+
+ private:
+ /**
+ * Walks aNode, its attributes and, if aDeep is true, its descendant nodes.
+ * If aClone is true the nodes will be cloned. If aNewNodeInfoManager is
+ * not null, it is used to create new nodeinfos for the nodes. Also reparents
+ * the XPConnect wrappers for the nodes into aReparentScope if non-null.
+ *
+ * @param aNode Node to adopt/clone.
+ * @param aClone If true the node will be cloned and the cloned node will
+ * be returned.
+ * @param aDeep If true the function will be called recursively on
+ * descendants of the node
+ * @param aNewNodeInfoManager The nodeinfo manager to use to create new
+ * nodeinfos for aNode and its attributes and
+ * descendants. May be null if the nodeinfos
+ * shouldn't be changed.
+ * @param aReparentScope Scope into which wrappers should be reparented, or
+ * null if no reparenting should be done.
+ * @param aParent If aClone is true the cloned node will be appended to
+ * aParent's children. May be null. If not null then aNode
+ * must be an nsIContent.
+ * @param aError The error, if any.
+ *
+ * @return If aClone is true then the cloned node will be returned,
+ * unless an error occurred. In error conditions, null
+ * will be returned.
+ */
+ static already_AddRefed<nsINode> CloneAndAdopt(
+ nsINode* aNode, bool aClone, bool aDeep,
+ nsNodeInfoManager* aNewNodeInfoManager,
+ JS::Handle<JSObject*> aReparentScope, nsINode* aParent,
+ mozilla::ErrorResult& aError);
+
+ public:
+ /**
+ * Walks the node, its attributes and descendant nodes. If aNewNodeInfoManager
+ * is not null, it is used to create new nodeinfos for the nodes. Also
+ * reparents the XPConnect wrappers for the nodes into aReparentScope if
+ * non-null.
+ *
+ * @param aNewNodeInfoManager The nodeinfo manager to use to create new
+ * nodeinfos for the node and its attributes and
+ * descendants. May be null if the nodeinfos
+ * shouldn't be changed.
+ * @param aReparentScope New scope for the wrappers, or null if no reparenting
+ * should be done.
+ * @param aError The error, if any.
+ */
+ void Adopt(nsNodeInfoManager* aNewNodeInfoManager,
+ JS::Handle<JSObject*> aReparentScope,
+ mozilla::ErrorResult& aError);
+
+ /**
+ * Clones the node, its attributes and, if aDeep is true, its descendant nodes
+ * If aNewNodeInfoManager is not null, it is used to create new nodeinfos for
+ * the clones.
+ *
+ * @param aDeep If true the function will be called recursively on
+ * descendants of the node
+ * @param aNewNodeInfoManager The nodeinfo manager to use to create new
+ * nodeinfos for the node and its attributes and
+ * descendants. May be null if the nodeinfos
+ * shouldn't be changed.
+ * @param aError The error, if any.
+ *
+ * @return The newly created node. Null in error conditions.
+ */
+ already_AddRefed<nsINode> Clone(bool aDeep,
+ nsNodeInfoManager* aNewNodeInfoManager,
+ mozilla::ErrorResult& aError);
+
+ /**
+ * Clones this node. This needs to be overriden by all node classes. aNodeInfo
+ * should be identical to this node's nodeInfo, except for the document which
+ * may be different. When cloning an element, all attributes of the element
+ * will be cloned. The children of the node will not be cloned.
+ *
+ * @param aNodeInfo the nodeinfo to use for the clone
+ * @param aResult the clone
+ */
+ virtual nsresult Clone(mozilla::dom::NodeInfo*, nsINode** aResult) const = 0;
+
+ // This class can be extended by subclasses that wish to store more
+ // information in the slots.
+ class nsSlots {
+ public:
+ nsSlots();
+
+ // If needed we could remove the vtable pointer this dtor causes by
+ // putting a DestroySlots function on nsINode
+ virtual ~nsSlots();
+
+ virtual void Traverse(nsCycleCollectionTraversalCallback&);
+ virtual void Unlink(nsINode&);
+
+ /**
+ * A list of mutation observers
+ */
+ mozilla::SafeDoublyLinkedList<nsIMutationObserver> mMutationObservers;
+
+ /**
+ * An object implementing NodeList for this content (childNodes)
+ * @see NodeList
+ * @see nsGenericHTMLElement::GetChildNodes
+ */
+ RefPtr<nsAttrChildContentList> mChildNodes;
+
+ /**
+ * Weak reference to this node. This is cleared by the destructor of
+ * nsNodeWeakReference.
+ */
+ nsNodeWeakReference* MOZ_NON_OWNING_REF mWeakReference;
+
+ /**
+ * A set of ranges which are in the selection and which have this node as
+ * their endpoints' closest common inclusive ancestor
+ * (https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor). This is
+ * a UniquePtr instead of just a LinkedList, because that prevents us from
+ * pushing DOMSlots up to the next allocation bucket size, at the cost of
+ * some complexity.
+ */
+ mozilla::UniquePtr<mozilla::LinkedList<mozilla::dom::AbstractRange>>
+ mClosestCommonInclusiveAncestorRanges;
+ };
+
+ /**
+ * Functions for managing flags and slots
+ */
+#ifdef DEBUG
+ nsSlots* DebugGetSlots() { return Slots(); }
+#endif
+
+ void SetFlags(FlagsType aFlagsToSet) {
+ NS_ASSERTION(
+ !(aFlagsToSet &
+ (NODE_IS_NATIVE_ANONYMOUS_ROOT | NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE |
+ NODE_DESCENDANTS_NEED_FRAMES | NODE_NEEDS_FRAME |
+ NODE_HAS_BEEN_IN_UA_WIDGET)) ||
+ IsContent(),
+ "Flag only permitted on nsIContent nodes");
+ nsWrapperCache::SetFlags(aFlagsToSet);
+ }
+
+ void UnsetFlags(FlagsType aFlagsToUnset) {
+ NS_ASSERTION(!(aFlagsToUnset & (NODE_HAS_BEEN_IN_UA_WIDGET |
+ NODE_IS_NATIVE_ANONYMOUS_ROOT)),
+ "Trying to unset write-only flags");
+ nsWrapperCache::UnsetFlags(aFlagsToUnset);
+ }
+
+ void SetEditableFlag(bool aEditable) {
+ if (aEditable) {
+ SetFlags(NODE_IS_EDITABLE);
+ } else {
+ UnsetFlags(NODE_IS_EDITABLE);
+ }
+ }
+
+ inline bool IsEditable() const;
+
+ /**
+ * Check if this node is in design mode or not. When this returns true and:
+ * - if this is a Document node, it's the design mode root.
+ * - if this is a content node, it's connected, it's not in a shadow tree
+ * (except shadow tree for UI widget and native anonymous subtree) and its
+ * uncomposed document is in design mode.
+ * Note that returning true does NOT mean the node or its children is
+ * editable. E.g., when this node is in a shadow tree of a UA widget and its
+ * host is in design mode.
+ */
+ inline bool IsInDesignMode() const;
+
+ /**
+ * Returns true if |this| or any of its ancestors is native anonymous.
+ */
+ bool IsInNativeAnonymousSubtree() const {
+ return HasFlag(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE);
+ }
+
+ /**
+ * If |this| or any ancestor is native anonymous, return the root of the
+ * native anonymous subtree. Note that in case of nested native anonymous
+ * content, this returns the innermost root, not the outermost.
+ */
+ nsIContent* GetClosestNativeAnonymousSubtreeRoot() const {
+ if (!IsInNativeAnonymousSubtree()) {
+ MOZ_ASSERT(!HasBeenInUAWidget(), "UA widget implies anonymous");
+ return nullptr;
+ }
+ MOZ_ASSERT(IsContent(), "How did non-content end up in NAC?");
+ if (HasBeenInUAWidget()) {
+ // reinterpret_cast because in this header we don't know ShadowRoot is an
+ // nsIContent. ShadowRoot constructor asserts this is correct.
+ return reinterpret_cast<nsIContent*>(GetContainingShadow());
+ }
+ for (const nsINode* node = this; node; node = node->GetParentNode()) {
+ if (node->IsRootOfNativeAnonymousSubtree()) {
+ return const_cast<nsINode*>(node)->AsContent();
+ }
+ }
+ // FIXME(emilio): This should not happen, usually, but editor removes nodes
+ // in native anonymous subtrees, and we don't clean nodes from the current
+ // event content stack from ContentRemoved, so it can actually happen, see
+ // bug 1510208.
+ NS_WARNING("GetClosestNativeAnonymousSubtreeRoot on disconnected NAC!");
+ return nullptr;
+ }
+
+ /**
+ * If |this| or any ancestor is native anonymous, return the parent of the
+ * native anonymous subtree. Note that in case of nested native anonymous
+ * content, this returns the parent or host of the innermost root, not the
+ * outermost.
+ */
+ nsIContent* GetClosestNativeAnonymousSubtreeRootParentOrHost() const {
+ // We could put this in nsIContentInlines.h or such to avoid this
+ // reinterpret_cast, but it doesn't seem worth it.
+ const auto* root = reinterpret_cast<const nsINode*>(
+ GetClosestNativeAnonymousSubtreeRoot());
+ if (!root) {
+ return nullptr;
+ }
+ if (nsIContent* parent = root->GetParent()) {
+ return parent;
+ }
+ if (MOZ_UNLIKELY(root->IsInShadowTree())) {
+ return root->DoGetShadowHost();
+ }
+ return nullptr;
+ }
+
+ /**
+ * Gets the root of the node tree for this content if it is in a shadow tree.
+ */
+ mozilla::dom::ShadowRoot* GetContainingShadow() const;
+ /**
+ * Gets the shadow host if this content is in a shadow tree. That is, the host
+ * of |GetContainingShadow|, if its not null.
+ *
+ * @return The shadow host, if this is in shadow tree, or null.
+ */
+ nsIContent* GetContainingShadowHost() const;
+
+ bool IsInSVGUseShadowTree() const {
+ return !!GetContainingSVGUseShadowHost();
+ }
+
+ mozilla::dom::SVGUseElement* GetContainingSVGUseShadowHost() const {
+ if (!IsInShadowTree()) {
+ return nullptr;
+ }
+ return DoGetContainingSVGUseShadowHost();
+ }
+
+ // Whether this node has ever been part of a UA widget shadow tree.
+ bool HasBeenInUAWidget() const { return HasFlag(NODE_HAS_BEEN_IN_UA_WIDGET); }
+
+ // True for native anonymous content and for content in UA widgets.
+ // Only nsIContent can fulfill this condition.
+ bool ChromeOnlyAccess() const { return IsInNativeAnonymousSubtree(); }
+
+ const nsIContent* GetChromeOnlyAccessSubtreeRootParent() const {
+ return GetClosestNativeAnonymousSubtreeRootParentOrHost();
+ }
+
+ bool IsInShadowTree() const { return HasFlag(NODE_IS_IN_SHADOW_TREE); }
+
+ /**
+ * Get whether this node is C++-generated anonymous content
+ * @see nsIAnonymousContentCreator
+ * @return whether this content is anonymous
+ */
+ bool IsRootOfNativeAnonymousSubtree() const {
+ NS_ASSERTION(
+ !HasFlag(NODE_IS_NATIVE_ANONYMOUS_ROOT) || IsInNativeAnonymousSubtree(),
+ "Some flags seem to be missing!");
+ return HasFlag(NODE_IS_NATIVE_ANONYMOUS_ROOT);
+ }
+
+ // Whether this node is the root of a ChromeOnlyAccess DOM subtree.
+ bool IsRootOfChromeAccessOnlySubtree() const {
+ return IsRootOfNativeAnonymousSubtree();
+ }
+
+ /**
+ * Returns true if |this| node is the closest common inclusive ancestor
+ * (https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor) of the
+ * start/end nodes of a Range in a Selection or a descendant of such a common
+ * ancestor. This node is definitely not selected when |false| is returned,
+ * but it may or may not be selected when |true| is returned.
+ */
+ bool IsMaybeSelected() const {
+ return IsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() ||
+ IsClosestCommonInclusiveAncestorForRangeInSelection();
+ }
+
+ /**
+ * Return true if any part of (this, aStartOffset) .. (this, aEndOffset)
+ * overlaps any nsRange in
+ * GetClosestCommonInclusiveAncestorForRangeInSelection ranges (i.e.
+ * where this is a descendant of a range's common inclusive ancestor node).
+ * If a nsRange starts in (this, aEndOffset) or if it ends in
+ * (this, aStartOffset) then it is non-overlapping and the result is false
+ * for that nsRange. Collapsed ranges always counts as non-overlapping.
+ *
+ * @param aStartOffset has to be less or equal to aEndOffset.
+ */
+ bool IsSelected(uint32_t aStartOffset, uint32_t aEndOffset) const;
+
+ /**
+ * Get the root element of the text editor associated with this node or the
+ * root element of the text editor of the ancestor 'TextControlElement' if
+ * this is in its native anonymous subtree. I.e., this returns anonymous
+ * `<div>` element of a `TextEditor`. Note that this can be used only for
+ * getting root content of `<input>` or `<textarea>`. I.e., this method
+ * doesn't support HTML editors. Note that this may create a `TextEditor`
+ * instance, and it means that the `TextEditor` may modify its native
+ * anonymous subtree and may run selection listeners.
+ */
+ MOZ_CAN_RUN_SCRIPT mozilla::dom::Element* GetAnonymousRootElementOfTextEditor(
+ mozilla::TextEditor** aTextEditor = nullptr);
+
+ /**
+ * Get the nearest selection root, ie. the node that will be selected if the
+ * user does "Select All" while the focus is in this node. Note that if this
+ * node is not in an editor, the result comes from the nsFrameSelection that
+ * is related to aPresShell, so the result might not be the ancestor of this
+ * node. Be aware that if this node and the computed selection limiter are
+ * not in same subtree, this returns the root content of the closeset subtree.
+ */
+ MOZ_CAN_RUN_SCRIPT nsIContent* GetSelectionRootContent(
+ mozilla::PresShell* aPresShell);
+
+ nsINodeList* ChildNodes();
+
+ nsIContent* GetFirstChild() const { return mFirstChild; }
+
+ nsIContent* GetLastChild() const;
+
+ /**
+ * Implementation is in Document.h, because it needs to cast from
+ * Document* to nsINode*.
+ */
+ Document* GetOwnerDocument() const;
+
+ // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY void Normalize();
+
+ /**
+ * Get the base URI for any relative URIs within this piece of
+ * content. Generally, this is the document's base URI, but certain
+ * content carries a local base for backward compatibility.
+ *
+ * @return the base URI. May return null.
+ */
+ virtual nsIURI* GetBaseURI(bool aTryUseXHRDocBaseURI = false) const = 0;
+ nsIURI* GetBaseURIObject() const;
+
+ /**
+ * Return true if the node may be apz aware. There are two cases. One is that
+ * the node is apz aware (such as HTMLInputElement with number type). The
+ * other is that the node has apz aware listeners. This is a non-virtual
+ * function which calls IsNodeApzAwareInternal only when the MayBeApzAware is
+ * set. We check the details in IsNodeApzAwareInternal which may be overriden
+ * by child classes
+ */
+ bool IsNodeApzAware() const {
+ return NodeMayBeApzAware() ? IsNodeApzAwareInternal() : false;
+ }
+
+ /**
+ * Override this function and set the flag MayBeApzAware in case the node has
+ * to let APZC be aware of it. It's used when the node may handle the apz
+ * aware events and may do preventDefault to stop APZC to do default actions.
+ *
+ * For example, instead of scrolling page by APZ, we handle mouse wheel event
+ * in HTMLInputElement with number type as increasing / decreasing its value.
+ */
+ virtual bool IsNodeApzAwareInternal() const;
+
+ void GetTextContent(nsAString& aTextContent, mozilla::OOMReporter& aError) {
+ GetTextContentInternal(aTextContent, aError);
+ }
+ void SetTextContent(const nsAString& aTextContent,
+ nsIPrincipal* aSubjectPrincipal,
+ mozilla::ErrorResult& aError) {
+ SetTextContentInternal(aTextContent, aSubjectPrincipal, aError);
+ }
+ void SetTextContent(const nsAString& aTextContent,
+ mozilla::ErrorResult& aError) {
+ SetTextContentInternal(aTextContent, nullptr, aError);
+ }
+
+ mozilla::dom::Element* QuerySelector(const nsACString& aSelector,
+ mozilla::ErrorResult& aResult);
+ already_AddRefed<nsINodeList> QuerySelectorAll(const nsACString& aSelector,
+ mozilla::ErrorResult& aResult);
+
+ protected:
+ // Document and ShadowRoot override this with its own (faster) version.
+ // This should really only be called for elements and document fragments.
+ mozilla::dom::Element* GetElementById(const nsAString& aId);
+
+ void AppendChildToChildList(nsIContent* aKid);
+ void InsertChildToChildList(nsIContent* aKid, nsIContent* aNextSibling);
+ void DisconnectChild(nsIContent* aKid);
+
+ public:
+ void LookupPrefix(const nsAString& aNamespace, nsAString& aResult);
+ bool IsDefaultNamespace(const nsAString& aNamespaceURI) {
+ nsAutoString defaultNamespace;
+ LookupNamespaceURI(u""_ns, defaultNamespace);
+ return aNamespaceURI.Equals(defaultNamespace);
+ }
+ void LookupNamespaceURI(const nsAString& aNamespacePrefix,
+ nsAString& aNamespaceURI);
+
+ nsIContent* GetNextSibling() const { return mNextSibling; }
+ nsIContent* GetPreviousSibling() const;
+
+ /**
+ * Return true if the node is being removed from the parent, it means that
+ * the node still knows the container which it's disconnected from, but the
+ * node has already been removed from the child node chain of the container.
+ * I.e., Return true between a call of DisconnectChild of the parent and
+ * a call of UnbindFromTree of the node.
+ */
+ bool IsBeingRemoved() const {
+ return mParent && !mNextSibling && !mPreviousOrLastSibling;
+ }
+
+ /**
+ * Get the next node in the pre-order tree traversal of the DOM. If
+ * aRoot is non-null, then it must be an ancestor of |this|
+ * (possibly equal to |this|) and only nodes that are descendants of
+ * aRoot, not including aRoot itself, will be returned. Returns
+ * null if there are no more nodes to traverse.
+ */
+ nsIContent* GetNextNode(const nsINode* aRoot = nullptr) const {
+ return GetNextNodeImpl(aRoot, false);
+ }
+
+ /**
+ * Get the next node in the pre-order tree traversal of the DOM but ignoring
+ * the children of this node. If aRoot is non-null, then it must be an
+ * ancestor of |this| (possibly equal to |this|) and only nodes that are
+ * descendants of aRoot, not including aRoot itself, will be returned.
+ * Returns null if there are no more nodes to traverse.
+ */
+ nsIContent* GetNextNonChildNode(const nsINode* aRoot = nullptr) const {
+ return GetNextNodeImpl(aRoot, true);
+ }
+
+ /**
+ * Returns true if 'this' is either document or element or
+ * document fragment and aOther is a descendant in the same
+ * anonymous tree.
+ */
+ bool Contains(const nsINode* aOther) const;
+
+ bool UnoptimizableCCNode() const;
+
+ /**
+ * Fire a DOMNodeRemoved mutation event for all children of this node
+ * TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+ */
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY void FireNodeRemovedForChildren();
+
+ void QueueDevtoolsAnonymousEvent(bool aIsRemove);
+
+ private:
+ mozilla::dom::SVGUseElement* DoGetContainingSVGUseShadowHost() const;
+
+ nsIContent* GetNextNodeImpl(const nsINode* aRoot,
+ const bool aSkipChildren) const {
+#ifdef DEBUG
+ if (aRoot) {
+ // TODO: perhaps nsINode::IsInclusiveDescendantOf could be used instead.
+ const nsINode* cur = this;
+ for (; cur; cur = cur->GetParentNode())
+ if (cur == aRoot) break;
+ NS_ASSERTION(cur, "aRoot not an ancestor of |this|?");
+ }
+#endif
+ if (!aSkipChildren) {
+ nsIContent* kid = GetFirstChild();
+ if (kid) {
+ return kid;
+ }
+ }
+ if (this == aRoot) {
+ return nullptr;
+ }
+ const nsINode* cur = this;
+ while (1) {
+ nsIContent* next = cur->GetNextSibling();
+ if (next) {
+ return next;
+ }
+ nsINode* parent = cur->GetParentNode();
+ if (parent == aRoot) {
+ return nullptr;
+ }
+ cur = parent;
+ }
+ MOZ_ASSERT_UNREACHABLE("How did we get here?");
+ }
+
+ public:
+ /**
+ * Get the previous nsIContent in the pre-order tree traversal of the DOM. If
+ * aRoot is non-null, then it must be an ancestor of |this|
+ * (possibly equal to |this|) and only nsIContents that are descendants of
+ * aRoot, including aRoot itself, will be returned. Returns
+ * null if there are no more nsIContents to traverse.
+ */
+ nsIContent* GetPreviousContent(const nsINode* aRoot = nullptr) const {
+#ifdef DEBUG
+ if (aRoot) {
+ // TODO: perhaps nsINode::IsInclusiveDescendantOf could be used instead.
+ const nsINode* cur = this;
+ for (; cur; cur = cur->GetParentNode())
+ if (cur == aRoot) break;
+ NS_ASSERTION(cur, "aRoot not an ancestor of |this|?");
+ }
+#endif
+
+ if (this == aRoot) {
+ return nullptr;
+ }
+ nsIContent* cur = this->GetParent();
+ nsIContent* iter = this->GetPreviousSibling();
+ while (iter) {
+ cur = iter;
+ iter = reinterpret_cast<nsINode*>(iter)->GetLastChild();
+ }
+ return cur;
+ }
+
+ /**
+ * Boolean flags
+ */
+ private:
+ enum BooleanFlag {
+ // Set if we're being used from -moz-element
+ NodeHasRenderingObservers,
+ // Set if our parent chain (including this node itself) terminates
+ // in a document
+ IsInDocument,
+ // Set if we're part of the composed doc.
+ // https://dom.spec.whatwg.org/#connected
+ IsConnected,
+ // Set if mParent is an nsIContent
+ ParentIsContent,
+ // Set if this node is an Element
+ NodeIsElement,
+ // Set if the element has a non-empty id attribute. This can in rare
+ // cases lie for nsXMLElement, such as when the node has been moved between
+ // documents with different id mappings.
+ ElementHasID,
+ // Set if the element might have a class.
+ ElementMayHaveClass,
+ // Set if the element might have inline style.
+ ElementMayHaveStyle,
+ // Set if the element has a name attribute set.
+ ElementHasName,
+ // Set if the element has a part attribute set.
+ ElementHasPart,
+ // Set if the element might have a contenteditable attribute set.
+ ElementMayHaveContentEditableAttr,
+ // Set if the node is the closest common inclusive ancestor of the start/end
+ // nodes of a Range that is in a Selection.
+ NodeIsClosestCommonInclusiveAncestorForRangeInSelection,
+ // Set if the node is a descendant of a node with the above bit set.
+ NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection,
+ // Set if CanSkipInCC check has been done for this subtree root.
+ NodeIsCCMarkedRoot,
+ // Maybe set if this node is in black subtree.
+ NodeIsCCBlackTree,
+ // Maybe set if the node is a root of a subtree
+ // which needs to be kept in the purple buffer.
+ NodeIsPurpleRoot,
+ // Set if the element has some style states locked
+ ElementHasLockedStyleStates,
+ // Set if element has pointer locked
+ ElementHasPointerLock,
+ // Set if the node may have DOMMutationObserver attached to it.
+ NodeMayHaveDOMMutationObserver,
+ // Set if node is Content
+ NodeIsContent,
+ // Set if the node has animations or transitions
+ ElementHasAnimations,
+ // Set if node has a dir attribute with a valid value (ltr, rtl, or auto).
+ // Note that we cannot compute this from the dir attribute event state
+ // flags, because we can't use those to distinguish
+ // <bdi dir="some-invalid-value"> and <bdi dir="auto">.
+ NodeHasValidDirAttribute,
+ // Set if the node has dir=auto and has a property pointing to the text
+ // node that determines its direction
+ NodeHasDirAutoSet,
+ // Set if the node is a text node descendant of a node with dir=auto
+ // and has a TextNodeDirectionalityMap property listing the elements whose
+ // direction it determines.
+ NodeHasTextNodeDirectionalityMap,
+ // Set if a node in the node's parent chain has dir=auto.
+ NodeAncestorHasDirAuto,
+ // Set if the node is handling a click.
+ NodeHandlingClick,
+ // Set if the element has a parser insertion mode other than "in body",
+ // per the HTML5 "Parse state" section.
+ ElementHasWeirdParserInsertionMode,
+ // Parser sets this flag if it has notified about the node.
+ ParserHasNotified,
+ // Sets if the node is apz aware or we have apz aware listeners.
+ MayBeApzAware,
+ // Set if the element might have any kind of anonymous content children,
+ // which would not be found through the element's children list.
+ ElementMayHaveAnonymousChildren,
+ // Set if element has CustomElementData.
+ ElementHasCustomElementData,
+ // Set if the element was created from prototype cache and
+ // its l10n attributes haven't been changed.
+ ElementCreatedFromPrototypeAndHasUnmodifiedL10n,
+ // Guard value
+ BooleanFlagCount
+ };
+
+ void SetBoolFlag(BooleanFlag name, bool value) {
+ static_assert(BooleanFlagCount <= 8 * sizeof(mBoolFlags),
+ "Too many boolean flags");
+ mBoolFlags = (mBoolFlags & ~(1 << name)) | (value << name);
+ }
+
+ void SetBoolFlag(BooleanFlag name) {
+ static_assert(BooleanFlagCount <= 8 * sizeof(mBoolFlags),
+ "Too many boolean flags");
+ mBoolFlags |= (1 << name);
+ }
+
+ void ClearBoolFlag(BooleanFlag name) {
+ static_assert(BooleanFlagCount <= 8 * sizeof(mBoolFlags),
+ "Too many boolean flags");
+ mBoolFlags &= ~(1 << name);
+ }
+
+ bool GetBoolFlag(BooleanFlag name) const {
+ static_assert(BooleanFlagCount <= 8 * sizeof(mBoolFlags),
+ "Too many boolean flags");
+ return mBoolFlags & (1 << name);
+ }
+
+ public:
+ bool HasRenderingObservers() const {
+ return GetBoolFlag(NodeHasRenderingObservers);
+ }
+ void SetHasRenderingObservers(bool aValue) {
+ SetBoolFlag(NodeHasRenderingObservers, aValue);
+ }
+ bool IsContent() const { return GetBoolFlag(NodeIsContent); }
+ bool HasID() const { return GetBoolFlag(ElementHasID); }
+ bool MayHaveClass() const { return GetBoolFlag(ElementMayHaveClass); }
+ void SetMayHaveClass() { SetBoolFlag(ElementMayHaveClass); }
+ bool MayHaveStyle() const { return GetBoolFlag(ElementMayHaveStyle); }
+ bool HasName() const { return GetBoolFlag(ElementHasName); }
+ bool HasPartAttribute() const { return GetBoolFlag(ElementHasPart); }
+ bool MayHaveContentEditableAttr() const {
+ return GetBoolFlag(ElementMayHaveContentEditableAttr);
+ }
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
+ */
+ bool IsClosestCommonInclusiveAncestorForRangeInSelection() const {
+ return GetBoolFlag(NodeIsClosestCommonInclusiveAncestorForRangeInSelection);
+ }
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
+ */
+ void SetClosestCommonInclusiveAncestorForRangeInSelection() {
+ SetBoolFlag(NodeIsClosestCommonInclusiveAncestorForRangeInSelection);
+ }
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
+ */
+ void ClearClosestCommonInclusiveAncestorForRangeInSelection() {
+ ClearBoolFlag(NodeIsClosestCommonInclusiveAncestorForRangeInSelection);
+ }
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
+ */
+ bool IsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() const {
+ return GetBoolFlag(
+ NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection);
+ }
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
+ */
+ void SetDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() {
+ SetBoolFlag(
+ NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection);
+ }
+ /**
+ * https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor
+ */
+ void ClearDescendantOfClosestCommonInclusiveAncestorForRangeInSelection() {
+ ClearBoolFlag(
+ NodeIsDescendantOfClosestCommonInclusiveAncestorForRangeInSelection);
+ }
+
+ void SetCCMarkedRoot(bool aValue) { SetBoolFlag(NodeIsCCMarkedRoot, aValue); }
+ bool CCMarkedRoot() const { return GetBoolFlag(NodeIsCCMarkedRoot); }
+ void SetInCCBlackTree(bool aValue) { SetBoolFlag(NodeIsCCBlackTree, aValue); }
+ bool InCCBlackTree() const { return GetBoolFlag(NodeIsCCBlackTree); }
+ void SetIsPurpleRoot(bool aValue) { SetBoolFlag(NodeIsPurpleRoot, aValue); }
+ bool IsPurpleRoot() const { return GetBoolFlag(NodeIsPurpleRoot); }
+ bool MayHaveDOMMutationObserver() {
+ return GetBoolFlag(NodeMayHaveDOMMutationObserver);
+ }
+ void SetMayHaveDOMMutationObserver() {
+ SetBoolFlag(NodeMayHaveDOMMutationObserver, true);
+ }
+ bool HasListenerManager() { return HasFlag(NODE_HAS_LISTENERMANAGER); }
+ bool HasPointerLock() const { return GetBoolFlag(ElementHasPointerLock); }
+ void SetPointerLock() { SetBoolFlag(ElementHasPointerLock); }
+ void ClearPointerLock() { ClearBoolFlag(ElementHasPointerLock); }
+ bool MayHaveAnimations() const { return GetBoolFlag(ElementHasAnimations); }
+ void SetMayHaveAnimations() { SetBoolFlag(ElementHasAnimations); }
+ void ClearMayHaveAnimations() { ClearBoolFlag(ElementHasAnimations); }
+ void SetHasValidDir() { SetBoolFlag(NodeHasValidDirAttribute); }
+ void ClearHasValidDir() { ClearBoolFlag(NodeHasValidDirAttribute); }
+ bool HasValidDir() const { return GetBoolFlag(NodeHasValidDirAttribute); }
+ void SetHasDirAutoSet() {
+ MOZ_ASSERT(NodeType() != TEXT_NODE, "SetHasDirAutoSet on text node");
+ SetBoolFlag(NodeHasDirAutoSet);
+ }
+ void ClearHasDirAutoSet() {
+ MOZ_ASSERT(NodeType() != TEXT_NODE, "ClearHasDirAutoSet on text node");
+ ClearBoolFlag(NodeHasDirAutoSet);
+ }
+ bool HasDirAutoSet() const { return GetBoolFlag(NodeHasDirAutoSet); }
+ void SetHasTextNodeDirectionalityMap() {
+ MOZ_ASSERT(NodeType() == TEXT_NODE,
+ "SetHasTextNodeDirectionalityMap on non-text node");
+ SetBoolFlag(NodeHasTextNodeDirectionalityMap);
+ }
+ void ClearHasTextNodeDirectionalityMap() {
+ MOZ_ASSERT(NodeType() == TEXT_NODE,
+ "ClearHasTextNodeDirectionalityMap on non-text node");
+ ClearBoolFlag(NodeHasTextNodeDirectionalityMap);
+ }
+ bool HasTextNodeDirectionalityMap() const {
+ MOZ_ASSERT(NodeType() == TEXT_NODE,
+ "HasTextNodeDirectionalityMap on non-text node");
+ return GetBoolFlag(NodeHasTextNodeDirectionalityMap);
+ }
+
+ void SetAncestorHasDirAuto() { SetBoolFlag(NodeAncestorHasDirAuto); }
+ void ClearAncestorHasDirAuto() { ClearBoolFlag(NodeAncestorHasDirAuto); }
+ bool AncestorHasDirAuto() const {
+ return GetBoolFlag(NodeAncestorHasDirAuto);
+ }
+
+ // Implemented in nsIContentInlines.h.
+ inline bool NodeOrAncestorHasDirAuto() const;
+
+ void SetParserHasNotified() { SetBoolFlag(ParserHasNotified); };
+ bool HasParserNotified() { return GetBoolFlag(ParserHasNotified); }
+
+ void SetMayBeApzAware() { SetBoolFlag(MayBeApzAware); }
+ bool NodeMayBeApzAware() const { return GetBoolFlag(MayBeApzAware); }
+
+ void SetMayHaveAnonymousChildren() {
+ SetBoolFlag(ElementMayHaveAnonymousChildren);
+ }
+ bool MayHaveAnonymousChildren() const {
+ return GetBoolFlag(ElementMayHaveAnonymousChildren);
+ }
+
+ void SetHasCustomElementData() { SetBoolFlag(ElementHasCustomElementData); }
+ bool HasCustomElementData() const {
+ return GetBoolFlag(ElementHasCustomElementData);
+ }
+
+ void SetElementCreatedFromPrototypeAndHasUnmodifiedL10n() {
+ SetBoolFlag(ElementCreatedFromPrototypeAndHasUnmodifiedL10n);
+ }
+ bool HasElementCreatedFromPrototypeAndHasUnmodifiedL10n() {
+ return GetBoolFlag(ElementCreatedFromPrototypeAndHasUnmodifiedL10n);
+ }
+ void ClearElementCreatedFromPrototypeAndHasUnmodifiedL10n() {
+ ClearBoolFlag(ElementCreatedFromPrototypeAndHasUnmodifiedL10n);
+ }
+
+ protected:
+ void SetParentIsContent(bool aValue) { SetBoolFlag(ParentIsContent, aValue); }
+ void SetIsInDocument() { SetBoolFlag(IsInDocument); }
+ void ClearInDocument() { ClearBoolFlag(IsInDocument); }
+ void SetIsConnected(bool aConnected) { SetBoolFlag(IsConnected, aConnected); }
+ void SetNodeIsContent() { SetBoolFlag(NodeIsContent); }
+ void SetIsElement() { SetBoolFlag(NodeIsElement); }
+ void SetHasID() { SetBoolFlag(ElementHasID); }
+ void ClearHasID() { ClearBoolFlag(ElementHasID); }
+ void SetMayHaveStyle() { SetBoolFlag(ElementMayHaveStyle); }
+ void SetHasName() { SetBoolFlag(ElementHasName); }
+ void ClearHasName() { ClearBoolFlag(ElementHasName); }
+ void SetHasPartAttribute(bool aPart) { SetBoolFlag(ElementHasPart, aPart); }
+ void SetMayHaveContentEditableAttr() {
+ SetBoolFlag(ElementMayHaveContentEditableAttr);
+ }
+ void SetHasLockedStyleStates() { SetBoolFlag(ElementHasLockedStyleStates); }
+ void ClearHasLockedStyleStates() {
+ ClearBoolFlag(ElementHasLockedStyleStates);
+ }
+ bool HasLockedStyleStates() const {
+ return GetBoolFlag(ElementHasLockedStyleStates);
+ }
+ void SetHasWeirdParserInsertionMode() {
+ SetBoolFlag(ElementHasWeirdParserInsertionMode);
+ }
+ bool HasWeirdParserInsertionMode() const {
+ return GetBoolFlag(ElementHasWeirdParserInsertionMode);
+ }
+ bool HandlingClick() const { return GetBoolFlag(NodeHandlingClick); }
+ void SetHandlingClick() { SetBoolFlag(NodeHandlingClick); }
+ void ClearHandlingClick() { ClearBoolFlag(NodeHandlingClick); }
+
+ void SetSubtreeRootPointer(nsINode* aSubtreeRoot) {
+ NS_ASSERTION(aSubtreeRoot, "aSubtreeRoot can never be null!");
+ NS_ASSERTION(!(IsContent() && IsInUncomposedDoc()) && !IsInShadowTree(),
+ "Shouldn't be here!");
+ mSubtreeRoot = aSubtreeRoot;
+ }
+
+ void ClearSubtreeRootPointer() { mSubtreeRoot = nullptr; }
+
+ public:
+ // Makes nsINode object to keep aObject alive.
+ void BindObject(nsISupports* aObject);
+ // After calling UnbindObject nsINode object doesn't keep
+ // aObject alive anymore.
+ void UnbindObject(nsISupports* aObject);
+
+ void GenerateXPath(nsAString& aResult);
+
+ already_AddRefed<mozilla::dom::AccessibleNode> GetAccessibleNode();
+
+ /**
+ * Returns the length of this node, as specified at
+ * <http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#concept-node-length>
+ */
+ uint32_t Length() const;
+
+ void GetNodeName(mozilla::dom::DOMString& aNodeName) {
+ const nsString& nodeName = NodeName();
+ aNodeName.SetKnownLiveString(nodeName);
+ }
+ [[nodiscard]] nsresult GetBaseURI(nsAString& aBaseURI) const;
+ // Return the base URI for the document.
+ // The returned value may differ if the document is loaded via XHR, and
+ // when accessed from chrome privileged script and
+ // from content privileged script for compatibility.
+ void GetBaseURIFromJS(nsAString& aBaseURI, CallerType aCallerType,
+ ErrorResult& aRv) const;
+ bool HasChildNodes() const { return HasChildren(); }
+
+ // See nsContentUtils::PositionIsBefore for aThisIndex and aOtherIndex usage.
+ uint16_t CompareDocumentPosition(
+ nsINode& aOther, mozilla::Maybe<uint32_t>* aThisIndex = nullptr,
+ mozilla::Maybe<uint32_t>* aOtherIndex = nullptr) const;
+ void GetNodeValue(nsAString& aNodeValue) { GetNodeValueInternal(aNodeValue); }
+ void SetNodeValue(const nsAString& aNodeValue, mozilla::ErrorResult& aError) {
+ SetNodeValueInternal(aNodeValue, aError);
+ }
+ virtual void GetNodeValueInternal(nsAString& aNodeValue);
+ virtual void SetNodeValueInternal(const nsAString& aNodeValue,
+ mozilla::ErrorResult& aError) {
+ // The DOM spec says that when nodeValue is defined to be null "setting it
+ // has no effect", so we don't throw an exception.
+ }
+ void EnsurePreInsertionValidity(nsINode& aNewChild, nsINode* aRefChild,
+ mozilla::ErrorResult& aError);
+ nsINode* InsertBefore(nsINode& aNode, nsINode* aChild,
+ mozilla::ErrorResult& aError) {
+ return ReplaceOrInsertBefore(false, &aNode, aChild, aError);
+ }
+
+ /**
+ * See <https://dom.spec.whatwg.org/#dom-node-appendchild>.
+ */
+ nsINode* AppendChild(nsINode& aNode, mozilla::ErrorResult& aError) {
+ return InsertBefore(aNode, nullptr, aError);
+ }
+
+ nsINode* ReplaceChild(nsINode& aNode, nsINode& aChild,
+ mozilla::ErrorResult& aError) {
+ return ReplaceOrInsertBefore(true, &aNode, &aChild, aError);
+ }
+ // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY nsINode* RemoveChild(
+ nsINode& aChild, mozilla::ErrorResult& aError);
+ already_AddRefed<nsINode> CloneNode(bool aDeep, mozilla::ErrorResult& aError);
+ bool IsSameNode(nsINode* aNode);
+ bool IsEqualNode(nsINode* aNode);
+ void GetNamespaceURI(nsAString& aNamespaceURI) const {
+ mNodeInfo->GetNamespaceURI(aNamespaceURI);
+ }
+#ifdef MOZILLA_INTERNAL_API
+ void GetPrefix(nsAString& aPrefix) { mNodeInfo->GetPrefix(aPrefix); }
+#endif
+ void GetLocalName(mozilla::dom::DOMString& aLocalName) const {
+ const nsString& localName = LocalName();
+ aLocalName.SetKnownLiveString(localName);
+ }
+
+ nsDOMAttributeMap* GetAttributes();
+
+ // Helper method to remove this node from its parent. This is not exposed
+ // through WebIDL.
+ // Only call this if the node has a parent node.
+ nsresult RemoveFromParent() {
+ nsINode* parent = GetParentNode();
+ mozilla::ErrorResult rv;
+ parent->RemoveChild(*this, rv);
+ return rv.StealNSResult();
+ }
+
+ // ChildNode methods
+ inline mozilla::dom::Element* GetPreviousElementSibling() const;
+ inline mozilla::dom::Element* GetNextElementSibling() const;
+
+ MOZ_CAN_RUN_SCRIPT void Before(const Sequence<OwningNodeOrString>& aNodes,
+ ErrorResult& aRv);
+ MOZ_CAN_RUN_SCRIPT void After(const Sequence<OwningNodeOrString>& aNodes,
+ ErrorResult& aRv);
+ MOZ_CAN_RUN_SCRIPT void ReplaceWith(
+ const Sequence<OwningNodeOrString>& aNodes, ErrorResult& aRv);
+ /**
+ * Remove this node from its parent, if any.
+ */
+ void Remove();
+
+ // ParentNode methods
+ mozilla::dom::Element* GetFirstElementChild() const;
+ mozilla::dom::Element* GetLastElementChild() const;
+
+ already_AddRefed<nsIHTMLCollection> GetElementsByAttribute(
+ const nsAString& aAttribute, const nsAString& aValue);
+ already_AddRefed<nsIHTMLCollection> GetElementsByAttributeNS(
+ const nsAString& aNamespaceURI, const nsAString& aAttribute,
+ const nsAString& aValue, ErrorResult& aRv);
+
+ MOZ_CAN_RUN_SCRIPT void Prepend(const Sequence<OwningNodeOrString>& aNodes,
+ ErrorResult& aRv);
+ MOZ_CAN_RUN_SCRIPT void Append(const Sequence<OwningNodeOrString>& aNodes,
+ ErrorResult& aRv);
+ MOZ_CAN_RUN_SCRIPT void ReplaceChildren(
+ const Sequence<OwningNodeOrString>& aNodes, ErrorResult& aRv);
+ MOZ_CAN_RUN_SCRIPT void ReplaceChildren(nsINode* aNode, ErrorResult& aRv);
+
+ void GetBoxQuads(const BoxQuadOptions& aOptions,
+ nsTArray<RefPtr<DOMQuad>>& aResult, CallerType aCallerType,
+ ErrorResult& aRv);
+
+ void GetBoxQuadsFromWindowOrigin(const BoxQuadOptions& aOptions,
+ nsTArray<RefPtr<DOMQuad>>& aResult,
+ ErrorResult& aRv);
+
+ already_AddRefed<DOMQuad> ConvertQuadFromNode(
+ DOMQuad& aQuad, const TextOrElementOrDocument& aFrom,
+ const ConvertCoordinateOptions& aOptions, CallerType aCallerType,
+ ErrorResult& aRv);
+ already_AddRefed<DOMQuad> ConvertRectFromNode(
+ DOMRectReadOnly& aRect, const TextOrElementOrDocument& aFrom,
+ const ConvertCoordinateOptions& aOptions, CallerType aCallerType,
+ ErrorResult& aRv);
+ already_AddRefed<DOMPoint> ConvertPointFromNode(
+ const DOMPointInit& aPoint, const TextOrElementOrDocument& aFrom,
+ const ConvertCoordinateOptions& aOptions, CallerType aCallerType,
+ ErrorResult& aRv);
+
+ /**
+ * See nsSlots::mClosestCommonInclusiveAncestorRanges.
+ */
+ const mozilla::LinkedList<mozilla::dom::AbstractRange>*
+ GetExistingClosestCommonInclusiveAncestorRanges() const {
+ if (!HasSlots()) {
+ return nullptr;
+ }
+ return GetExistingSlots()->mClosestCommonInclusiveAncestorRanges.get();
+ }
+
+ /**
+ * See nsSlots::mClosestCommonInclusiveAncestorRanges.
+ */
+ mozilla::LinkedList<mozilla::dom::AbstractRange>*
+ GetExistingClosestCommonInclusiveAncestorRanges() {
+ if (!HasSlots()) {
+ return nullptr;
+ }
+ return GetExistingSlots()->mClosestCommonInclusiveAncestorRanges.get();
+ }
+
+ /**
+ * See nsSlots::mClosestCommonInclusiveAncestorRanges.
+ */
+ mozilla::UniquePtr<mozilla::LinkedList<mozilla::dom::AbstractRange>>&
+ GetClosestCommonInclusiveAncestorRangesPtr() {
+ return Slots()->mClosestCommonInclusiveAncestorRanges;
+ }
+
+ nsIWeakReference* GetExistingWeakReference() {
+ return HasSlots() ? GetExistingSlots()->mWeakReference : nullptr;
+ }
+
+ protected:
+ // Override this function to create a custom slots class.
+ // Must not return null.
+ virtual nsINode::nsSlots* CreateSlots();
+
+ bool HasSlots() const { return mSlots != nullptr; }
+
+ nsSlots* GetExistingSlots() const { return mSlots; }
+
+ nsSlots* Slots() {
+ if (!HasSlots()) {
+ mSlots = CreateSlots();
+ MOZ_ASSERT(mSlots);
+ }
+ return GetExistingSlots();
+ }
+
+ /**
+ * Invalidate cached child array inside mChildNodes
+ * of type nsParentNodeChildContentList.
+ */
+ void InvalidateChildNodes();
+
+ virtual void GetTextContentInternal(nsAString& aTextContent,
+ mozilla::OOMReporter& aError);
+ virtual void SetTextContentInternal(const nsAString& aTextContent,
+ nsIPrincipal* aSubjectPrincipal,
+ mozilla::ErrorResult& aError) {}
+
+ void EnsurePreInsertionValidity1(mozilla::ErrorResult& aError);
+ void EnsurePreInsertionValidity2(bool aReplace, nsINode& aNewChild,
+ nsINode* aRefChild,
+ mozilla::ErrorResult& aError);
+ // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY nsINode* ReplaceOrInsertBefore(
+ bool aReplace, nsINode* aNewChild, nsINode* aRefChild,
+ mozilla::ErrorResult& aError);
+
+ /**
+ * Returns the Element that should be used for resolving namespaces
+ * on this node (ie the ownerElement for attributes, the documentElement for
+ * documents, the node itself for elements and for other nodes the parentNode
+ * if it is an element).
+ */
+ virtual mozilla::dom::Element* GetNameSpaceElement() = 0;
+
+ /**
+ * Parse the given selector string into a servo SelectorList.
+ *
+ * Never returns null if aRv is not failing.
+ *
+ * Note that the selector list returned here is owned by the owner doc's
+ * selector cache.
+ */
+ const mozilla::StyleSelectorList* ParseSelectorList(
+ const nsACString& aSelectorString, mozilla::ErrorResult&);
+
+ public:
+ /* Event stuff that documents and elements share.
+
+ Note that we include DOCUMENT_ONLY_EVENT events here so that we
+ can forward all the document stuff to this implementation.
+ */
+#define EVENT(name_, id_, type_, struct_) \
+ mozilla::dom::EventHandlerNonNull* GetOn##name_() { \
+ return GetEventHandler(nsGkAtoms::on##name_); \
+ } \
+ void SetOn##name_(mozilla::dom::EventHandlerNonNull* handler) { \
+ SetEventHandler(nsGkAtoms::on##name_, handler); \
+ }
+#define TOUCH_EVENT EVENT
+#define DOCUMENT_ONLY_EVENT EVENT
+#include "mozilla/EventNameList.h"
+#undef DOCUMENT_ONLY_EVENT
+#undef TOUCH_EVENT
+#undef EVENT
+
+ protected:
+ static bool Traverse(nsINode* tmp, nsCycleCollectionTraversalCallback& cb);
+ static void Unlink(nsINode* tmp);
+
+ RefPtr<mozilla::dom::NodeInfo> mNodeInfo;
+
+ // mParent is an owning ref most of the time, except for the case of document
+ // nodes, so it cannot be represented by nsCOMPtr, so mark is as
+ // MOZ_OWNING_REF.
+ nsINode* MOZ_OWNING_REF mParent;
+
+ private:
+#ifndef BOOL_FLAGS_ON_WRAPPER_CACHE
+ // Boolean flags.
+ uint32_t mBoolFlags;
+#endif
+
+ // NOTE, there are 32 bits left here, at least in 64 bit builds.
+
+ uint32_t mChildCount;
+
+ protected:
+ // mNextSibling and mFirstChild are strong references while
+ // mPreviousOrLastSibling is a weak ref. |mFirstChild->mPreviousOrLastSibling|
+ // points to the last child node.
+ nsCOMPtr<nsIContent> mFirstChild;
+ nsCOMPtr<nsIContent> mNextSibling;
+ nsIContent* MOZ_NON_OWNING_REF mPreviousOrLastSibling;
+
+ union {
+ // Pointer to our primary frame. Might be null.
+ nsIFrame* mPrimaryFrame;
+
+ // Pointer to the root of our subtree. Might be null.
+ // This reference is non-owning and safe, since it either points to the
+ // object itself, or is reset by ClearSubtreeRootPointer.
+ nsINode* MOZ_NON_OWNING_REF mSubtreeRoot;
+ };
+
+ // Storage for more members that are usually not needed; allocated lazily.
+ nsSlots* mSlots;
+};
+
+inline nsINode* mozilla::dom::EventTarget::GetAsNode() {
+ return IsNode() ? AsNode() : nullptr;
+}
+
+inline const nsINode* mozilla::dom::EventTarget::GetAsNode() const {
+ return const_cast<mozilla::dom::EventTarget*>(this)->GetAsNode();
+}
+
+inline nsINode* mozilla::dom::EventTarget::AsNode() {
+ MOZ_DIAGNOSTIC_ASSERT(IsNode());
+ return static_cast<nsINode*>(this);
+}
+
+inline const nsINode* mozilla::dom::EventTarget::AsNode() const {
+ MOZ_DIAGNOSTIC_ASSERT(IsNode());
+ return static_cast<const nsINode*>(this);
+}
+
+// Useful inline function for getting a node given an nsIContent and a Document.
+// Returns the first argument cast to nsINode if it is non-null, otherwise
+// returns the second (which may be null). We use type variables instead of
+// nsIContent* and Document* because the actual types must be
+// known for the cast to work.
+template <class C, class D>
+inline nsINode* NODE_FROM(C& aContent, D& aDocument) {
+ if (aContent) return static_cast<nsINode*>(aContent);
+ return static_cast<nsINode*>(aDocument);
+}
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsINode, NS_INODE_IID)
+
+inline nsISupports* ToSupports(nsINode* aPointer) { return aPointer; }
+
+// Some checks are faster to do on nsIContent or Element than on
+// nsINode, so spit out FromNode versions taking those types too.
+#define NS_IMPL_FROMNODE_GENERIC(_class, _check, _const) \
+ template <typename T> \
+ static auto FromNode(_const T& aNode) \
+ ->decltype(static_cast<_const _class*>(&aNode)) { \
+ return aNode._check ? static_cast<_const _class*>(&aNode) : nullptr; \
+ } \
+ template <typename T> \
+ static _const _class* FromNode(_const T* aNode) { \
+ return FromNode(*aNode); \
+ } \
+ template <typename T> \
+ static _const _class* FromNodeOrNull(_const T* aNode) { \
+ return aNode ? FromNode(*aNode) : nullptr; \
+ } \
+ template <typename T> \
+ static auto FromEventTarget(_const T& aEventTarget) \
+ ->decltype(static_cast<_const _class*>(&aEventTarget)) { \
+ return aEventTarget.IsNode() && aEventTarget.AsNode()->_check \
+ ? static_cast<_const _class*>(&aEventTarget) \
+ : nullptr; \
+ } \
+ template <typename T> \
+ static _const _class* FromEventTarget(_const T* aEventTarget) { \
+ return FromEventTarget(*aEventTarget); \
+ } \
+ template <typename T> \
+ static _const _class* FromEventTargetOrNull(_const T* aEventTarget) { \
+ return aEventTarget ? FromEventTarget(*aEventTarget) : nullptr; \
+ }
+
+#define NS_IMPL_FROMNODE_HELPER(_class, _check) \
+ NS_IMPL_FROMNODE_GENERIC(_class, _check, ) \
+ NS_IMPL_FROMNODE_GENERIC(_class, _check, const) \
+ \
+ template <typename T> \
+ static _class* FromNode(T&& aNode) { \
+ /* We need the double-cast in case aNode is a smartptr. Those */ \
+ /* can cast to superclasses of the type they're templated on, */ \
+ /* but not directly to subclasses. */ \
+ return aNode->_check ? static_cast<_class*>(static_cast<nsINode*>(aNode)) \
+ : nullptr; \
+ } \
+ template <typename T> \
+ static _class* FromNodeOrNull(T&& aNode) { \
+ return aNode ? FromNode(aNode) : nullptr; \
+ } \
+ template <typename T> \
+ static _class* FromEventTarget(T&& aEventTarget) { \
+ /* We need the double-cast in case aEventTarget is a smartptr. Those */ \
+ /* can cast to superclasses of the type they're templated on, */ \
+ /* but not directly to subclasses. */ \
+ return aEventTarget->IsNode() && aEventTarget->AsNode()->_check \
+ ? static_cast<_class*>(static_cast<EventTarget*>(aEventTarget)) \
+ : nullptr; \
+ } \
+ template <typename T> \
+ static _class* FromEventTargetOrNull(T&& aEventTarget) { \
+ return aEventTarget ? FromEventTarget(aEventTarget) : nullptr; \
+ }
+
+#define NS_IMPL_FROMNODE(_class, _nsid) \
+ NS_IMPL_FROMNODE_HELPER(_class, IsInNamespace(_nsid))
+
+#define NS_IMPL_FROMNODE_WITH_TAG(_class, _nsid, _tag) \
+ NS_IMPL_FROMNODE_HELPER(_class, NodeInfo()->Equals(nsGkAtoms::_tag, _nsid))
+
+#define NS_IMPL_FROMNODE_HTML_WITH_TAG(_class, _tag) \
+ NS_IMPL_FROMNODE_WITH_TAG(_class, kNameSpaceID_XHTML, _tag)
+
+#endif /* nsINode_h___ */