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gecko-dev/content/base/public/nsINode.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsINode_h___
#define nsINode_h___
#include "mozilla/Likely.h"
#include "nsCOMPtr.h" // for member, local
#include "nsGkAtoms.h" // for nsGkAtoms::baseURIProperty
#include "nsIDOMNode.h"
#include "nsINodeInfo.h" // member (in nsCOMPtr)
#include "nsIVariant.h" // for use in GetUserData()
#include "nsNodeInfoManager.h" // for use in NodePrincipal()
#include "nsPropertyTable.h" // for typedefs
#include "nsTObserverArray.h" // for member
#include "nsWindowMemoryReporter.h" // for NS_DECL_SIZEOF_EXCLUDING_THIS
#include "mozilla/ErrorResult.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/EventTarget.h" // for base class
#include "js/TypeDecls.h" // for Handle, Value, JSObject, JSContext
// Including 'windows.h' will #define GetClassInfo to something else.
#ifdef XP_WIN
#ifdef GetClassInfo
#undef GetClassInfo
#endif
#endif
class nsAttrAndChildArray;
class nsChildContentList;
class nsDOMAttributeMap;
class nsIContent;
class nsIDocument;
class nsIDOMElement;
class nsIDOMNodeList;
class nsIDOMUserDataHandler;
class nsIEditor;
class nsIFrame;
class nsIMutationObserver;
class nsINodeList;
class nsIPresShell;
class nsIPrincipal;
class nsIURI;
class nsNodeSupportsWeakRefTearoff;
class nsNodeWeakReference;
class nsXPCClassInfo;
class nsDOMMutationObserver;
namespace mozilla {
namespace dom {
/**
* @return true if aChar is what the DOM spec defines as 'space character'.
* http://dom.spec.whatwg.org/#space-character
*/
inline bool IsSpaceCharacter(PRUnichar 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 Element;
class EventHandlerNonNull;
class OnErrorEventHandlerNonNull;
template<typename T> class Optional;
} // namespace dom
} // namespace mozilla
#define NODE_FLAG_BIT(n_) (1U << (WRAPPER_CACHE_FLAGS_BITS_USED + (n_)))
enum {
// 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 this node is the root of an anonymous subtree. Note that this
// need not be a native anonymous subtree. Any anonymous subtree, including
// XBL-generated ones, will do. 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_ANONYMOUS = NODE_FLAG_BIT(2),
// 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_ANONYMOUS_SUBTREE = NODE_FLAG_BIT(3),
// 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(4),
// Forces the XBL code to treat this node as if it were
// in the document and therefore should get bindings attached.
NODE_FORCE_XBL_BINDINGS = NODE_FLAG_BIT(5),
// Whether a binding manager may have a pointer to this
NODE_MAY_BE_IN_BINDING_MNGR = NODE_FLAG_BIT(6),
NODE_IS_EDITABLE = NODE_FLAG_BIT(7),
// For all Element nodes, NODE_MAY_HAVE_CLASS is guaranteed to be set if the
// node in fact has a class, but may be set even if it doesn't.
NODE_MAY_HAVE_CLASS = NODE_FLAG_BIT(8),
// Node has an :empty or :-moz-only-whitespace selector
NODE_HAS_EMPTY_SELECTOR = NODE_FLAG_BIT(10),
// A child of the node has a selector such that any insertion,
// removal, or appending of children requires restyling the parent.
NODE_HAS_SLOW_SELECTOR = NODE_FLAG_BIT(11),
// 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(12),
// 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(13),
NODE_ALL_SELECTOR_FLAGS = NODE_HAS_EMPTY_SELECTOR |
NODE_HAS_SLOW_SELECTOR |
NODE_HAS_EDGE_CHILD_SELECTOR |
NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS,
NODE_ATTACH_BINDING_ON_POSTCREATE = NODE_FLAG_BIT(14),
// This node needs to go through frame construction to get a frame (or
// undisplayed entry).
NODE_NEEDS_FRAME = NODE_FLAG_BIT(15),
// 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(16),
// Set if the node has the accesskey attribute set.
NODE_HAS_ACCESSKEY = NODE_FLAG_BIT(17),
// Set if the node has right-to-left directionality
NODE_HAS_DIRECTION_RTL = NODE_FLAG_BIT(18),
// Set if the node has left-to-right directionality
NODE_HAS_DIRECTION_LTR = NODE_FLAG_BIT(19),
NODE_ALL_DIRECTION_FLAGS = NODE_HAS_DIRECTION_LTR |
NODE_HAS_DIRECTION_RTL,
NODE_CHROME_ONLY_ACCESS = NODE_FLAG_BIT(20),
NODE_IS_ROOT_OF_CHROME_ONLY_ACCESS = NODE_FLAG_BIT(21),
// Remaining bits are node type specific.
NODE_TYPE_SPECIFIC_BITS_OFFSET = 22
};
// Make sure we have space for our bits
#define ASSERT_NODE_FLAGS_SPACE(n) PR_STATIC_ASSERT(WRAPPER_CACHE_FLAGS_BITS_USED + (n) <= 32)
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.
*
* When a guard is instantiated sMutationCount is set to 300. It is then
* decremented by every mutation (capped at 0). This means that we can only
* detect 300 mutations during the lifetime of a single guard, however that
* should be more then we ever care about as we usually only care if more then
* one mutation has occurred.
*
* When the guard goes out of scope it will adjust sMutationCount so that over
* the lifetime of the guard the guard itself has not affected sMutationCount,
* while mutations that happened while the guard was alive still will. This
* allows a guard to be instantiated even if there is another guard higher up
* on the callstack watching for mutations.
*
* The only thing that has to be avoided is for an outer guard to be used
* while an inner guard is alive. This can be avoided by only ever
* instantiating a single guard per scope and only using the guard in the
* current scope.
*/
class nsMutationGuard {
public:
nsMutationGuard()
{
mDelta = eMaxMutations - sMutationCount;
sMutationCount = eMaxMutations;
}
~nsMutationGuard()
{
sMutationCount =
mDelta > sMutationCount ? 0 : sMutationCount - mDelta;
}
/**
* Returns true if any unexpected mutations have occurred. You can pass in
* an 8-bit ignore count to ignore a number of expected mutations.
*/
bool Mutated(uint8_t aIgnoreCount)
{
return sMutationCount < static_cast<uint32_t>(eMaxMutations - 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()
{
if (sMutationCount) {
--sMutationCount;
}
}
private:
// mDelta is the amount sMutationCount was adjusted when the guard was
// initialized. It is needed so that we can undo that adjustment once
// the guard dies.
uint32_t mDelta;
// The value 300 is not important, as long as it is bigger then anything
// ever passed to Mutated().
enum { eMaxMutations = 300 };
// sMutationCount is a global mutation counter which is decreased by one at
// every mutation. It is capped at 0 to avoid wrapping.
// Its value is always between 0 and 300, inclusive.
static uint32_t sMutationCount;
};
// Categories of node properties
// 0 is global.
#define DOM_USER_DATA 1
#define DOM_USER_DATA_HANDLER 2
#define SMIL_MAPPED_ATTR_ANIMVAL 3
// IID for the nsINode interface
#define NS_INODE_IID \
{ 0xe24a9ddc, 0x2979, 0x40e3, \
{ 0x82, 0xb0, 0x9d, 0xf8, 0xb0, 0x41, 0xe5, 0x6a } }
/**
* An internal interface that abstracts some DOMNode-related parts that both
* nsIContent and nsIDocument share. An instance of this interface has a list
* of nsIContent children and provides access to them.
*/
class nsINode : public mozilla::dom::EventTarget
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_INODE_IID)
// 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
//
NS_DECL_SIZEOF_EXCLUDING_THIS
// 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, and so |aMallocSizeOf(this)| is always
// safe to call no matter which object it was invoked on.
virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
friend class nsNodeUtils;
friend class nsNodeWeakReference;
friend class nsNodeSupportsWeakRefTearoff;
friend class nsAttrAndChildArray;
#ifdef MOZILLA_INTERNAL_API
#ifdef _MSC_VER
#pragma warning(push)
// Disable annoying warning about 'this' in initializers.
#pragma warning(disable:4355)
#endif
nsINode(already_AddRefed<nsINodeInfo> aNodeInfo)
: mNodeInfo(aNodeInfo),
mParent(nullptr),
mBoolFlags(0),
mNextSibling(nullptr),
mPreviousSibling(nullptr),
mFirstChild(nullptr),
mSubtreeRoot(this),
mSlots(nullptr)
{
SetIsDOMBinding();
}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif
virtual ~nsINode();
/**
* Bit-flags to pass (or'ed together) to IsNodeOfType()
*/
enum {
/** nsIContent nodes */
eCONTENT = 1 << 0,
/** nsIDocument nodes */
eDOCUMENT = 1 << 1,
/** nsIAttribute nodes */
eATTRIBUTE = 1 << 2,
/** text nodes */
eTEXT = 1 << 3,
/** xml processing instructions */
ePROCESSING_INSTRUCTION = 1 << 4,
/** comment nodes */
eCOMMENT = 1 << 5,
/** form control elements */
eHTML_FORM_CONTROL = 1 << 6,
/** document fragments */
eDOCUMENT_FRAGMENT = 1 << 7,
/** data nodes (comments, PIs, text). Nodes of this type always
returns a non-null value for nsIContent::GetText() */
eDATA_NODE = 1 << 8,
/** HTMLMediaElement */
eMEDIA = 1 << 9,
/** animation elements */
eANIMATION = 1 << 10,
/** filter elements that implement SVGFilterPrimitiveStandardAttributes */
eFILTER = 1 << 11
};
/**
* API for doing a quick check if a content is of a given
* type, such as Text, Document, Comment ... Use this when you can instead of
* checking the tag.
*
* @param aFlags what types you want to test for (see above)
* @return whether the content matches ALL flags passed in
*/
virtual bool IsNodeOfType(uint32_t aFlags) const = 0;
virtual JSObject* WrapObject(JSContext *aCx,
JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
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.
*/
virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aScope)
{
MOZ_ASSERT(!IsDOMBinding(), "Someone forgot to override WrapNode");
return nullptr;
}
public:
nsIDocument* GetParentObject() const
{
// Make sure that we get the owner document of the content node, in case
// we're in document teardown. If we are, it's important to *not* use
// globalObj as the node's parent since that would give the node the
// principal of globalObj (i.e. the principal of the document that's being
// loaded) and not the principal of the document that's being unloaded.
// See http://bugzilla.mozilla.org/show_bug.cgi?id=227417
return OwnerDoc();
}
/**
* Return whether the node is an Element node
*/
bool IsElement() const {
return GetBoolFlag(NodeIsElement);
}
/**
* Return this node as an Element. Should only be used for nodes
* for which IsElement() is true. This is defined inline in Element.h.
*/
mozilla::dom::Element* AsElement();
const mozilla::dom::Element* AsElement() const;
/**
* Return this node as nsIContent. Should only be used for nodes for which
* IsContent() is true. This is defined inline in nsIContent.h.
*/
nsIContent* AsContent();
virtual nsIDOMNode* AsDOMNode() = 0;
/**
* Return if this node has any children.
*/
bool HasChildren() const { return !!mFirstChild; }
/**
* Get the number of children
* @return the number of children
*/
virtual uint32_t GetChildCount() const = 0;
/**
* Get a child by index
* @param aIndex the index of the child to get
* @return the child, or null if index out of bounds
*/
virtual nsIContent* GetChildAt(uint32_t aIndex) const = 0;
/**
* Get a raw pointer to the child array. This should only be used if you
* plan to walk a bunch of the kids, promise to make sure that nothing ever
* mutates (no attribute changes, not DOM tree changes, no script execution,
* NOTHING), and will never ever peform an out-of-bounds access here. This
* method may return null if there are no children, or it may return a
* garbage pointer. In all cases the out param will be set to the number of
* children.
*/
virtual nsIContent * const * GetChildArray(uint32_t* aChildCount) const = 0;
/**
* 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
*
* If the return value is not -1, then calling GetChildAt() with that value
* will return aPossibleChild.
*/
virtual int32_t IndexOf(const nsINode* aPossibleChild) const = 0;
/**
* Return the "owner document" of this node. Note that this is not the same
* as the DOM ownerDocument -- that's null for Document nodes, whereas for a
* nsIDocument GetOwnerDocument returns the document itself. For nsIContent
* implementations the two are the same.
*/
nsIDocument *OwnerDoc() const
{
return mNodeInfo->GetDocument();
}
/**
* Return the "owner document" of this node as an nsINode*. Implemented
* in nsIDocument.h.
*/
nsINode *OwnerDocAsNode() const;
/**
* Returns true if the content has an ancestor that is a document.
*
* @return whether this content is in a document tree
*/
bool IsInDoc() 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
*/
nsIDocument *GetCurrentDoc() const
{
return IsInDoc() ? OwnerDoc() : nullptr;
}
/**
* The values returned by this function are the ones defined for
* nsIDOMNode.nodeType
*/
uint16_t NodeType() const
{
return mNodeInfo->NodeType();
}
const nsString& NodeName() const
{
return mNodeInfo->NodeName();
}
const nsString& LocalName() const
{
return mNodeInfo->LocalName();
}
/**
* Get the tag for this element. This will always return a non-null atom
* pointer (as implied by the naming of the method). For elements this is
* the non-namespaced tag, and for other nodes it's something like "#text",
* "#comment", "#document", etc.
*/
nsIAtom* Tag() const
{
return mNodeInfo->NameAtom();
}
/**
* Insert a content node at a particular index. This method handles calling
* BindToTree on the child appropriately.
*
* @param aKid the content to insert
* @param aIndex the index it is being inserted at (the index it will have
* after it is inserted)
* @param aNotify whether to notify the document (current document for
* nsIContent, and |this| for nsIDocument) that the insert has
* occurred
*
* @throws 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
* nsIDocument::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|.
*
* @throws NS_ERROR_OUT_OF_MEMORY in some cases (from BindToTree).
*/
virtual nsresult InsertChildAt(nsIContent* aKid, uint32_t aIndex,
bool aNotify) = 0;
/**
* 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 nsIDocument) that the append has
* occurred
*
* @throws 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
* nsIDocument::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|.
*
* @throws NS_ERROR_OUT_OF_MEMORY in some cases (from BindToTree).
*/
nsresult AppendChildTo(nsIContent* aKid, bool aNotify)
{
return InsertChildAt(aKid, GetChildCount(), aNotify);
}
/**
* Remove a child from this node. This method handles calling UnbindFromTree
* on the child appropriately.
*
* @param aIndex the index of the child to remove
* @param aNotify whether to notify the document (current document for
* nsIContent, and |this| for nsIDocument) that the remove has
* occurred
*
* Note: If there is no child at aIndex, this method will simply do nothing.
*/
virtual void RemoveChildAt(uint32_t aIndex, bool aNotify) = 0;
/**
* 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(nsIAtom *aPropertyName,
nsresult *aStatus = nullptr) const
{
return GetProperty(0, aPropertyName, aStatus);
}
/**
* Get a property associated with this node.
*
* @param aCategory category of property to get.
* @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).
*/
virtual void* GetProperty(uint16_t aCategory,
nsIAtom *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(nsIAtom *aPropertyName,
void *aValue,
NSPropertyDtorFunc aDtor = nullptr,
bool aTransfer = false)
{
return SetProperty(0, aPropertyName, aValue, aDtor, aTransfer);
}
/**
* 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 aCategory category of property to 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.
* @param aOldValue [out] previous value of property.
*
* @return NS_PROPTABLE_PROP_OVERWRITTEN (success value) if the property
* was already set
* @throws NS_ERROR_OUT_OF_MEMORY if that occurs
*/
virtual nsresult SetProperty(uint16_t aCategory,
nsIAtom *aPropertyName,
void *aValue,
NSPropertyDtorFunc aDtor = nullptr,
bool aTransfer = false,
void **aOldValue = nullptr);
/**
* Destroys 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 DeleteProperty(nsIAtom *aPropertyName)
{
DeleteProperty(0, aPropertyName);
}
/**
* Destroys a property associated with this node. The value is destroyed
* using the destruction function given when that value was set.
*
* @param aCategory category of property to destroy.
* @param aPropertyName name of property to destroy.
*/
virtual void DeleteProperty(uint16_t aCategory, nsIAtom *aPropertyName);
/**
* Unset 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* UnsetProperty(nsIAtom *aPropertyName,
nsresult *aStatus = nullptr)
{
return UnsetProperty(0, aPropertyName, aStatus);
}
/**
* Unset 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 aCategory category of property to unset.
* @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).
*/
virtual void* UnsetProperty(uint16_t aCategory,
nsIAtom *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();
}
/**
* 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)) ?
reinterpret_cast<nsIContent*>(mParent) : nullptr;
}
/**
* Get the parent nsINode for this node. This can be either an nsIContent,
* an nsIDocument or an nsIAttribute.
* @return the parent node
*/
nsINode* GetParentNode() const
{
return mParent;
}
/**
* Get the parent nsINode for this node if it is an Element.
* @return the parent node
*/
mozilla::dom::Element* GetParentElement() const
{
return mParent && mParent->IsElement() ? mParent->AsElement() : nullptr;
}
/**
* 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
{
// There are three cases of interest here. nsINodes that are really:
// 1. nsIDocument nodes - Are always in the document.
// 2. nsIContent nodes - Are either in the document, or mSubtreeRoot
// is updated in BindToTree/UnbindFromTree.
// 3. nsIAttribute nodes - Are never in the document, and mSubtreeRoot
// is always 'this' (as set in nsINode's ctor).
nsINode* node = IsInDoc() ? OwnerDocAsNode() : mSubtreeRoot;
NS_ASSERTION(node, "Should always have a node here!");
#ifdef DEBUG
{
const nsINode* slowNode = this;
const nsINode* iter = slowNode;
while ((iter = iter->GetParentNode())) {
slowNode = iter;
}
NS_ASSERTION(slowNode == node, "These should always be in sync!");
}
#endif
return node;
}
/**
* See nsIDOMEventTarget
*/
NS_DECL_NSIDOMEVENTTARGET
using mozilla::dom::EventTarget::RemoveEventListener;
using nsIDOMEventTarget::AddEventListener;
virtual void AddEventListener(const nsAString& aType,
nsIDOMEventListener* aListener,
bool aUseCapture,
const mozilla::dom::Nullable<bool>& aWantsUntrusted,
mozilla::ErrorResult& aRv) MOZ_OVERRIDE;
using nsIDOMEventTarget::AddSystemEventListener;
virtual nsIDOMWindow* GetOwnerGlobal() MOZ_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.
*/
void AddMutationObserver(nsIMutationObserver* aMutationObserver)
{
nsSlots* s = Slots();
NS_ASSERTION(s->mMutationObservers.IndexOf(aMutationObserver) ==
nsTArray<int>::NoIndex,
"Observer already in the list");
s->mMutationObservers.AppendElement(aMutationObserver);
}
/**
* Same as above, but only adds the observer if its not observing
* the node already.
*/
void AddMutationObserverUnlessExists(nsIMutationObserver* aMutationObserver)
{
nsSlots* s = Slots();
s->mMutationObservers.AppendElementUnlessExists(aMutationObserver);
}
/**
* Removes a mutation observer.
*/
void RemoveMutationObserver(nsIMutationObserver* aMutationObserver)
{
nsSlots* s = GetExistingSlots();
if (s) {
s->mMutationObservers.RemoveElement(aMutationObserver);
}
}
/**
* 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(nsINodeInfo *aNodeInfo, nsINode **aResult) const = 0;
// This class can be extended by subclasses that wish to store more
// information in the slots.
class nsSlots
{
public:
nsSlots()
: mChildNodes(nullptr),
mWeakReference(nullptr)
{
}
// If needed we could remove the vtable pointer this dtor causes by
// putting a DestroySlots function on nsINode
virtual ~nsSlots();
void Traverse(nsCycleCollectionTraversalCallback &cb);
void Unlink();
/**
* A list of mutation observers
*/
nsTObserverArray<nsIMutationObserver*> mMutationObservers;
/**
* An object implementing nsIDOMNodeList for this content (childNodes)
* @see nsIDOMNodeList
* @see nsGenericHTMLElement::GetChildNodes
*
* MSVC 7 doesn't like this as an nsRefPtr
*/
nsChildContentList* mChildNodes;
/**
* Weak reference to this node
*/
nsNodeWeakReference* mWeakReference;
};
/**
* Functions for managing flags and slots
*/
#ifdef DEBUG
nsSlots* DebugGetSlots()
{
return Slots();
}
#endif
void SetFlags(uint32_t aFlagsToSet)
{
NS_ASSERTION(!(aFlagsToSet & (NODE_IS_ANONYMOUS |
NODE_IS_NATIVE_ANONYMOUS_ROOT |
NODE_IS_IN_ANONYMOUS_SUBTREE |
NODE_ATTACH_BINDING_ON_POSTCREATE |
NODE_DESCENDANTS_NEED_FRAMES |
NODE_NEEDS_FRAME |
NODE_CHROME_ONLY_ACCESS)) ||
IsNodeOfType(eCONTENT),
"Flag only permitted on nsIContent nodes");
nsWrapperCache::SetFlags(aFlagsToSet);
}
void UnsetFlags(uint32_t aFlagsToUnset)
{
NS_ASSERTION(!(aFlagsToUnset &
(NODE_IS_ANONYMOUS |
NODE_IS_IN_ANONYMOUS_SUBTREE |
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);
}
}
bool IsEditable() const
{
#ifdef MOZILLA_INTERNAL_API
return IsEditableInternal();
#else
return IsEditableExternal();
#endif
}
/**
* Returns true if |this| or any of its ancestors is native anonymous.
*/
bool IsInNativeAnonymousSubtree() const
{
#ifdef DEBUG
if (HasFlag(NODE_IS_IN_ANONYMOUS_SUBTREE)) {
return true;
}
CheckNotNativeAnonymous();
return false;
#else
return HasFlag(NODE_IS_IN_ANONYMOUS_SUBTREE);
#endif
}
// True for native anonymous content and for XBL content if the binging
// has chromeOnlyContent="true".
bool ChromeOnlyAccess() const
{
return HasFlag(NODE_IS_IN_ANONYMOUS_SUBTREE | NODE_CHROME_ONLY_ACCESS);
}
/**
* Returns true if |this| node is the common 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 IsSelectionDescendant() const
{
return IsDescendantOfCommonAncestorForRangeInSelection() ||
IsCommonAncestorForRangeInSelection();
}
/**
* Get the root content of an editor. So, this node must be a descendant of
* an editor. Note that this should be only used for getting input or textarea
* editor's root content. This method doesn't support HTML editors.
*/
nsIContent* GetTextEditorRootContent(nsIEditor** aEditor = 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.
*/
nsIContent* GetSelectionRootContent(nsIPresShell* aPresShell);
virtual nsINodeList* ChildNodes();
nsIContent* GetFirstChild() const { return mFirstChild; }
nsIContent* GetLastChild() const
{
uint32_t count;
nsIContent* const* children = GetChildArray(&count);
return count > 0 ? children[count - 1] : nullptr;
}
/**
* Implementation is in nsIDocument.h, because it needs to cast from
* nsIDocument* to nsINode*.
*/
nsIDocument* GetOwnerDocument() const;
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, and XML
* supports setting a per-node base URI.
*
* @return the base URI
*/
virtual already_AddRefed<nsIURI> GetBaseURI() const = 0;
already_AddRefed<nsIURI> GetBaseURIObject() const
{
return GetBaseURI();
}
/**
* Facility for explicitly setting a base URI on a node.
*/
nsresult SetExplicitBaseURI(nsIURI* aURI);
/**
* The explicit base URI, if set, otherwise null
*/
protected:
nsIURI* GetExplicitBaseURI() const {
if (HasExplicitBaseURI()) {
return static_cast<nsIURI*>(GetProperty(nsGkAtoms::baseURIProperty));
}
return nullptr;
}
public:
void GetTextContent(nsAString& aTextContent)
{
GetTextContentInternal(aTextContent);
}
void SetTextContent(const nsAString& aTextContent,
mozilla::ErrorResult& aError)
{
SetTextContentInternal(aTextContent, aError);
}
mozilla::dom::Element* QuerySelector(const nsAString& aSelector,
mozilla::ErrorResult& aResult);
already_AddRefed<nsINodeList> QuerySelectorAll(const nsAString& aSelector,
mozilla::ErrorResult& aResult);
nsresult QuerySelector(const nsAString& aSelector, nsIDOMElement **aReturn);
nsresult QuerySelectorAll(const nsAString& aSelector, nsIDOMNodeList **aReturn);
/**
* Associate an object aData to aKey on this node. If aData is null any
* previously registered object and UserDataHandler associated to aKey on
* this node will be removed.
* Should only be used to implement the DOM Level 3 UserData API.
*
* @param aKey the key to associate the object to
* @param aData the object to associate to aKey on this node (may be null)
* @param aHandler the UserDataHandler to call when the node is
* cloned/deleted/imported/renamed (may be null)
* @param aResult [out] the previously registered object for aKey on this
* node, if any
* @return whether adding the object and UserDataHandler succeeded
*/
nsresult SetUserData(const nsAString& aKey, nsIVariant* aData,
nsIDOMUserDataHandler* aHandler, nsIVariant** aResult);
/**
* Get the UserData object registered for a Key on this node, if any.
* Should only be used to implement the DOM Level 3 UserData API.
*
* @param aKey the key to get UserData for
* @return aResult the previously registered object for aKey on this node, if
* any
*/
nsIVariant* GetUserData(const nsAString& aKey);
nsresult GetUserData(const nsAString& aKey, nsIVariant** aResult)
{
NS_IF_ADDREF(*aResult = GetUserData(aKey));
return NS_OK;
}
void LookupPrefix(const nsAString& aNamespace, nsAString& aResult);
bool IsDefaultNamespace(const nsAString& aNamespaceURI)
{
nsAutoString defaultNamespace;
LookupNamespaceURI(EmptyString(), defaultNamespace);
return aNamespaceURI.Equals(defaultNamespace);
}
void LookupNamespaceURI(const nsAString& aNamespacePrefix,
nsAString& aNamespaceURI);
nsresult IsEqualNode(nsIDOMNode* aOther, bool* aReturn);
nsIContent* GetNextSibling() const { return mNextSibling; }
nsIContent* GetPreviousSibling() const { return mPreviousSibling; }
/**
* 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;
nsresult Contains(nsIDOMNode* aOther, bool* aReturn);
bool UnoptimizableCCNode() const;
private:
nsIContent* GetNextNodeImpl(const nsINode* aRoot,
const bool aSkipChildren) const
{
// Can't use nsContentUtils::ContentIsDescendantOf here, since we
// can't include it here.
#ifdef DEBUG
if (aRoot) {
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;
}
NS_NOTREACHED("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
{
// Can't use nsContentUtils::ContentIsDescendantOf here, since we
// can't include it here.
#ifdef DEBUG
if (aRoot) {
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 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 inline style.
ElementMayHaveStyle,
// Set if the element has a name attribute set.
ElementHasName,
// Set if the element might have a contenteditable attribute set.
ElementMayHaveContentEditableAttr,
// Set if the node is the common ancestor of the start/end nodes of a Range
// that is in a Selection.
NodeIsCommonAncestorForRangeInSelection,
// Set if the node is a descendant of a node with the above bit set.
NodeIsDescendantOfCommonAncestorForRangeInSelection,
// 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 node has an explicit base URI stored
NodeHasExplicitBaseURI,
// 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)
NodeHasValidDirAttribute,
// Set if node has a dir attribute with a fixed value (ltr or rtl, NOT auto)
NodeHasFixedDir,
// 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 the node has dir=auto.
NodeHasDirAuto,
// Set if a node in the node's parent chain has dir=auto.
NodeAncestorHasDirAuto,
// Set if the element is in the scope of a scoped style sheet; this flag is
// only accurate for elements bound to a document
ElementIsInStyleScope,
// Set if the element is a scoped style sheet root
ElementIsScopedStyleRoot,
// Set if the node is handling a click.
NodeHandlingClick,
// Set if the node has had :hover selectors matched against it
NodeHasRelevantHoverRules,
// Guard value
BooleanFlagCount
};
void SetBoolFlag(BooleanFlag name, bool value) {
PR_STATIC_ASSERT(BooleanFlagCount <= 8*sizeof(mBoolFlags));
mBoolFlags = (mBoolFlags & ~(1 << name)) | (value << name);
}
void SetBoolFlag(BooleanFlag name) {
PR_STATIC_ASSERT(BooleanFlagCount <= 8*sizeof(mBoolFlags));
mBoolFlags |= (1 << name);
}
void ClearBoolFlag(BooleanFlag name) {
PR_STATIC_ASSERT(BooleanFlagCount <= 8*sizeof(mBoolFlags));
mBoolFlags &= ~(1 << name);
}
bool GetBoolFlag(BooleanFlag name) const {
PR_STATIC_ASSERT(BooleanFlagCount <= 8*sizeof(mBoolFlags));
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 MayHaveStyle() const { return GetBoolFlag(ElementMayHaveStyle); }
bool HasName() const { return GetBoolFlag(ElementHasName); }
bool MayHaveContentEditableAttr() const
{ return GetBoolFlag(ElementMayHaveContentEditableAttr); }
bool IsCommonAncestorForRangeInSelection() const
{ return GetBoolFlag(NodeIsCommonAncestorForRangeInSelection); }
void SetCommonAncestorForRangeInSelection()
{ SetBoolFlag(NodeIsCommonAncestorForRangeInSelection); }
void ClearCommonAncestorForRangeInSelection()
{ ClearBoolFlag(NodeIsCommonAncestorForRangeInSelection); }
bool IsDescendantOfCommonAncestorForRangeInSelection() const
{ return GetBoolFlag(NodeIsDescendantOfCommonAncestorForRangeInSelection); }
void SetDescendantOfCommonAncestorForRangeInSelection()
{ SetBoolFlag(NodeIsDescendantOfCommonAncestorForRangeInSelection); }
void ClearDescendantOfCommonAncestorForRangeInSelection()
{ ClearBoolFlag(NodeIsDescendantOfCommonAncestorForRangeInSelection); }
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() { return GetBoolFlag(ElementHasAnimations); }
void SetMayHaveAnimations() { SetBoolFlag(ElementHasAnimations); }
void SetHasValidDir() { SetBoolFlag(NodeHasValidDirAttribute); }
void ClearHasValidDir() { ClearBoolFlag(NodeHasValidDirAttribute); }
bool HasValidDir() const { return GetBoolFlag(NodeHasValidDirAttribute); }
void SetHasFixedDir() {
MOZ_ASSERT(NodeType() != nsIDOMNode::TEXT_NODE,
"SetHasFixedDir on text node");
SetBoolFlag(NodeHasFixedDir);
}
void ClearHasFixedDir() {
MOZ_ASSERT(NodeType() != nsIDOMNode::TEXT_NODE,
"ClearHasFixedDir on text node");
ClearBoolFlag(NodeHasFixedDir);
}
bool HasFixedDir() const { return GetBoolFlag(NodeHasFixedDir); }
void SetHasDirAutoSet() {
MOZ_ASSERT(NodeType() != nsIDOMNode::TEXT_NODE,
"SetHasDirAutoSet on text node");
SetBoolFlag(NodeHasDirAutoSet);
}
void ClearHasDirAutoSet() {
MOZ_ASSERT(NodeType() != nsIDOMNode::TEXT_NODE,
"ClearHasDirAutoSet on text node");
ClearBoolFlag(NodeHasDirAutoSet);
}
bool HasDirAutoSet() const
{ return GetBoolFlag(NodeHasDirAutoSet); }
void SetHasTextNodeDirectionalityMap() {
MOZ_ASSERT(NodeType() == nsIDOMNode::TEXT_NODE,
"SetHasTextNodeDirectionalityMap on non-text node");
SetBoolFlag(NodeHasTextNodeDirectionalityMap);
}
void ClearHasTextNodeDirectionalityMap() {
MOZ_ASSERT(NodeType() == nsIDOMNode::TEXT_NODE,
"ClearHasTextNodeDirectionalityMap on non-text node");
ClearBoolFlag(NodeHasTextNodeDirectionalityMap);
}
bool HasTextNodeDirectionalityMap() const
{ return GetBoolFlag(NodeHasTextNodeDirectionalityMap); }
void SetHasDirAuto() { SetBoolFlag(NodeHasDirAuto); }
void ClearHasDirAuto() { ClearBoolFlag(NodeHasDirAuto); }
bool HasDirAuto() const { return GetBoolFlag(NodeHasDirAuto); }
void SetAncestorHasDirAuto() { SetBoolFlag(NodeAncestorHasDirAuto); }
void ClearAncestorHasDirAuto() { ClearBoolFlag(NodeAncestorHasDirAuto); }
bool AncestorHasDirAuto() const { return GetBoolFlag(NodeAncestorHasDirAuto); }
bool NodeOrAncestorHasDirAuto() const
{ return HasDirAuto() || AncestorHasDirAuto(); }
void SetIsElementInStyleScope(bool aValue) {
MOZ_ASSERT(IsElement(), "SetIsInStyleScope on a non-Element node");
SetBoolFlag(ElementIsInStyleScope, aValue);
}
void SetIsElementInStyleScope() {
MOZ_ASSERT(IsElement(), "SetIsInStyleScope on a non-Element node");
SetBoolFlag(ElementIsInStyleScope);
}
void ClearIsElementInStyleScope() {
MOZ_ASSERT(IsElement(), "ClearIsInStyleScope on a non-Element node");
ClearBoolFlag(ElementIsInStyleScope);
}
bool IsElementInStyleScope() const { return GetBoolFlag(ElementIsInStyleScope); }
void SetIsScopedStyleRoot() { SetBoolFlag(ElementIsScopedStyleRoot); }
void ClearIsScopedStyleRoot() { ClearBoolFlag(ElementIsScopedStyleRoot); }
bool IsScopedStyleRoot() { return GetBoolFlag(ElementIsScopedStyleRoot); }
bool HasRelevantHoverRules() const { return GetBoolFlag(NodeHasRelevantHoverRules); }
void SetHasRelevantHoverRules() { SetBoolFlag(NodeHasRelevantHoverRules); }
protected:
void SetParentIsContent(bool aValue) { SetBoolFlag(ParentIsContent, aValue); }
void SetInDocument() { SetBoolFlag(IsInDocument); }
void SetNodeIsContent() { SetBoolFlag(NodeIsContent); }
void ClearInDocument() { ClearBoolFlag(IsInDocument); }
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 SetMayHaveContentEditableAttr()
{ SetBoolFlag(ElementMayHaveContentEditableAttr); }
bool HasExplicitBaseURI() const { return GetBoolFlag(NodeHasExplicitBaseURI); }
void SetHasExplicitBaseURI() { SetBoolFlag(NodeHasExplicitBaseURI); }
void SetHasLockedStyleStates() { SetBoolFlag(ElementHasLockedStyleStates); }
void ClearHasLockedStyleStates() { ClearBoolFlag(ElementHasLockedStyleStates); }
bool HasLockedStyleStates() const
{ return GetBoolFlag(ElementHasLockedStyleStates); }
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(!(IsNodeOfType(eCONTENT) && IsInDoc()), "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 GetBoundMutationObservers(nsTArray<nsRefPtr<nsDOMMutationObserver> >& aResult);
/**
* 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(nsAString& aNodeName) const
{
aNodeName = NodeName();
}
void GetBaseURI(nsAString& aBaseURI) const;
bool HasChildNodes() const
{
return HasChildren();
}
uint16_t CompareDocumentPosition(nsINode& aOther) 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.
}
nsINode* InsertBefore(nsINode& aNode, nsINode* aChild,
mozilla::ErrorResult& aError)
{
return ReplaceOrInsertBefore(false, &aNode, aChild, aError);
}
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);
}
nsINode* RemoveChild(nsINode& aChild, mozilla::ErrorResult& aError);
already_AddRefed<nsINode> CloneNode(bool aDeep, mozilla::ErrorResult& aError);
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(nsAString& aLocalName)
{
aLocalName = mNodeInfo->LocalName();
}
// HasAttributes is defined inline in Element.h.
bool HasAttributes() const;
nsDOMAttributeMap* GetAttributes();
JS::Value SetUserData(JSContext* aCx, const nsAString& aKey,
JS::Handle<JS::Value> aData,
nsIDOMUserDataHandler* aHandler,
mozilla::ErrorResult& aError);
JS::Value GetUserData(JSContext* aCx, const nsAString& aKey,
mozilla::ErrorResult& aError);
// 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.ErrorCode();
}
// ChildNode methods
mozilla::dom::Element* GetPreviousElementSibling() const;
mozilla::dom::Element* GetNextElementSibling() const;
/**
* Remove this node from its parent, if any.
*/
void Remove();
// ParentNode methods
mozilla::dom::Element* GetFirstElementChild() const;
mozilla::dom::Element* GetLastElementChild() const;
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();
}
nsTObserverArray<nsIMutationObserver*> *GetMutationObservers()
{
return HasSlots() ? &GetExistingSlots()->mMutationObservers : nullptr;
}
bool IsEditableInternal() const;
virtual bool IsEditableExternal() const
{
return IsEditableInternal();
}
virtual void GetTextContentInternal(nsAString& aTextContent);
virtual void SetTextContentInternal(const nsAString& aTextContent,
mozilla::ErrorResult& aError)
{
}
#ifdef DEBUG
// Note: virtual so that IsInNativeAnonymousSubtree can be called accross
// module boundaries.
virtual void CheckNotNativeAnonymous() const;
#endif
// These are just used to implement nsIDOMNode using
// NS_FORWARD_NSIDOMNODE_TO_NSINODE_HELPER and for quickstubs.
nsresult GetParentNode(nsIDOMNode** aParentNode);
nsresult GetParentElement(nsIDOMElement** aParentElement);
nsresult GetChildNodes(nsIDOMNodeList** aChildNodes);
nsresult GetFirstChild(nsIDOMNode** aFirstChild);
nsresult GetLastChild(nsIDOMNode** aLastChild);
nsresult GetPreviousSibling(nsIDOMNode** aPrevSibling);
nsresult GetNextSibling(nsIDOMNode** aNextSibling);
nsresult GetOwnerDocument(nsIDOMDocument** aOwnerDocument);
nsresult CompareDocumentPosition(nsIDOMNode* aOther,
uint16_t* aReturn);
nsresult ReplaceOrInsertBefore(bool aReplace, nsIDOMNode *aNewChild,
nsIDOMNode *aRefChild, nsIDOMNode **aReturn);
nsINode* ReplaceOrInsertBefore(bool aReplace, nsINode* aNewChild,
nsINode* aRefChild,
mozilla::ErrorResult& aError);
nsresult RemoveChild(nsIDOMNode* aOldChild, nsIDOMNode** aReturn);
/**
* 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;
/**
* Most of the implementation of the nsINode RemoveChildAt method.
* Should only be called on document, element, and document fragment
* nodes. The aChildArray passed in should be the one for |this|.
*
* @param aIndex The index to remove at.
* @param aNotify Whether to notify.
* @param aKid The kid at aIndex. Must not be null.
* @param aChildArray The child array to work with.
* @param aMutationEvent whether to fire a mutation event for this removal.
*/
void doRemoveChildAt(uint32_t aIndex, bool aNotify, nsIContent* aKid,
nsAttrAndChildArray& aChildArray);
/**
* Most of the implementation of the nsINode InsertChildAt method.
* Should only be called on document, element, and document fragment
* nodes. The aChildArray passed in should be the one for |this|.
*
* @param aKid The child to insert.
* @param aIndex The index to insert at.
* @param aNotify Whether to notify.
* @param aChildArray The child array to work with
*/
nsresult doInsertChildAt(nsIContent* aKid, uint32_t aIndex,
bool aNotify, nsAttrAndChildArray& aChildArray);
public:
/* Event stuff that documents and elements share. This needs to be
NS_IMETHOD because some subclasses implement DOM methods with
this exact name and signature and then the calling convention
needs to match.
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_(); \
void SetOn##name_(mozilla::dom::EventHandlerNonNull* listener); \
NS_IMETHOD GetOn##name_(JSContext *cx, JS::Value *vp); \
NS_IMETHOD SetOn##name_(JSContext *cx, const JS::Value &v);
#define TOUCH_EVENT EVENT
#define DOCUMENT_ONLY_EVENT EVENT
#include "nsEventNameList.h"
#undef DOCUMENT_ONLY_EVENT
#undef TOUCH_EVENT
#undef EVENT
protected:
static bool Traverse(nsINode *tmp, nsCycleCollectionTraversalCallback &cb);
static void Unlink(nsINode *tmp);
nsCOMPtr<nsINodeInfo> mNodeInfo;
nsINode* mParent;
private:
// Boolean flags.
uint32_t mBoolFlags;
protected:
nsIContent* mNextSibling;
nsIContent* mPreviousSibling;
nsIContent* mFirstChild;
union {
// Pointer to our primary frame. Might be null.
nsIFrame* mPrimaryFrame;
// Pointer to the root of our subtree. Might be null.
nsINode* mSubtreeRoot;
};
// Storage for more members that are usually not needed; allocated lazily.
nsSlots* mSlots;
};
// Useful inline function for getting a node given an nsIContent and an
// nsIDocument. 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 nsIDocument* 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;
}
inline nsISupports*
ToCanonicalSupports(nsINode* aPointer)
{
return aPointer;
}
#define NS_FORWARD_NSIDOMNODE_TO_NSINODE_HELPER(...) \
NS_IMETHOD GetNodeName(nsAString& aNodeName) __VA_ARGS__ \
{ \
nsINode::GetNodeName(aNodeName); \
return NS_OK; \
} \
NS_IMETHOD GetNodeValue(nsAString& aNodeValue) __VA_ARGS__ \
{ \
nsINode::GetNodeValue(aNodeValue); \
return NS_OK; \
} \
NS_IMETHOD SetNodeValue(const nsAString& aNodeValue) __VA_ARGS__ \
{ \
mozilla::ErrorResult rv; \
nsINode::SetNodeValue(aNodeValue, rv); \
return rv.ErrorCode(); \
} \
NS_IMETHOD GetNodeType(uint16_t* aNodeType) __VA_ARGS__ \
{ \
*aNodeType = nsINode::NodeType(); \
return NS_OK; \
} \
NS_IMETHOD GetParentNode(nsIDOMNode** aParentNode) __VA_ARGS__ \
{ \
return nsINode::GetParentNode(aParentNode); \
} \
NS_IMETHOD GetParentElement(nsIDOMElement** aParentElement) __VA_ARGS__ \
{ \
return nsINode::GetParentElement(aParentElement); \
} \
NS_IMETHOD GetChildNodes(nsIDOMNodeList** aChildNodes) __VA_ARGS__ \
{ \
return nsINode::GetChildNodes(aChildNodes); \
} \
NS_IMETHOD GetFirstChild(nsIDOMNode** aFirstChild) __VA_ARGS__ \
{ \
return nsINode::GetFirstChild(aFirstChild); \
} \
NS_IMETHOD GetLastChild(nsIDOMNode** aLastChild) __VA_ARGS__ \
{ \
return nsINode::GetLastChild(aLastChild); \
} \
NS_IMETHOD GetPreviousSibling(nsIDOMNode** aPreviousSibling) __VA_ARGS__ \
{ \
return nsINode::GetPreviousSibling(aPreviousSibling); \
} \
NS_IMETHOD GetNextSibling(nsIDOMNode** aNextSibling) __VA_ARGS__ \
{ \
return nsINode::GetNextSibling(aNextSibling); \
} \
NS_IMETHOD GetOwnerDocument(nsIDOMDocument** aOwnerDocument) __VA_ARGS__ \
{ \
return nsINode::GetOwnerDocument(aOwnerDocument); \
} \
NS_IMETHOD InsertBefore(nsIDOMNode* aNewChild, nsIDOMNode* aRefChild, nsIDOMNode** aResult) __VA_ARGS__ \
{ \
return ReplaceOrInsertBefore(false, aNewChild, aRefChild, aResult); \
} \
NS_IMETHOD ReplaceChild(nsIDOMNode* aNewChild, nsIDOMNode* aOldChild, nsIDOMNode** aResult) __VA_ARGS__ \
{ \
return ReplaceOrInsertBefore(true, aNewChild, aOldChild, aResult); \
} \
NS_IMETHOD RemoveChild(nsIDOMNode* aOldChild, nsIDOMNode** aResult) __VA_ARGS__ \
{ \
return nsINode::RemoveChild(aOldChild, aResult); \
} \
NS_IMETHOD AppendChild(nsIDOMNode* aNewChild, nsIDOMNode** aResult) __VA_ARGS__ \
{ \
return InsertBefore(aNewChild, nullptr, aResult); \
} \
NS_IMETHOD HasChildNodes(bool* aResult) __VA_ARGS__ \
{ \
*aResult = nsINode::HasChildNodes(); \
return NS_OK; \
} \
NS_IMETHOD CloneNode(bool aDeep, uint8_t aArgc, nsIDOMNode** aResult) __VA_ARGS__ \
{ \
if (aArgc == 0) { \
aDeep = true; \
} \
mozilla::ErrorResult rv; \
nsCOMPtr<nsINode> clone = nsINode::CloneNode(aDeep, rv); \
if (rv.Failed()) { \
return rv.ErrorCode(); \
} \
*aResult = clone.forget().get()->AsDOMNode(); \
return NS_OK; \
} \
NS_IMETHOD Normalize() __VA_ARGS__ \
{ \
nsINode::Normalize(); \
return NS_OK; \
} \
NS_IMETHOD GetNamespaceURI(nsAString& aNamespaceURI) __VA_ARGS__ \
{ \
nsINode::GetNamespaceURI(aNamespaceURI); \
return NS_OK; \
} \
NS_IMETHOD GetPrefix(nsAString& aPrefix) __VA_ARGS__ \
{ \
nsINode::GetPrefix(aPrefix); \
return NS_OK; \
} \
NS_IMETHOD GetLocalName(nsAString& aLocalName) __VA_ARGS__ \
{ \
nsINode::GetLocalName(aLocalName); \
return NS_OK; \
} \
using nsINode::HasAttributes; \
NS_IMETHOD HasAttributes(bool* aResult) __VA_ARGS__ \
{ \
*aResult = nsINode::HasAttributes(); \
return NS_OK; \
} \
NS_IMETHOD GetDOMBaseURI(nsAString& aBaseURI) __VA_ARGS__ \
{ \
nsINode::GetBaseURI(aBaseURI); \
return NS_OK; \
} \
NS_IMETHOD CompareDocumentPosition(nsIDOMNode* aOther, uint16_t* aResult) __VA_ARGS__ \
{ \
return nsINode::CompareDocumentPosition(aOther, aResult); \
} \
NS_IMETHOD GetTextContent(nsAString& aTextContent) __VA_ARGS__ \
{ \
nsINode::GetTextContent(aTextContent); \
return NS_OK; \
} \
NS_IMETHOD SetTextContent(const nsAString& aTextContent) __VA_ARGS__ \
{ \
mozilla::ErrorResult rv; \
nsINode::SetTextContent(aTextContent, rv); \
return rv.ErrorCode(); \
} \
NS_IMETHOD LookupPrefix(const nsAString& aNamespaceURI, nsAString& aResult) __VA_ARGS__ \
{ \
nsINode::LookupPrefix(aNamespaceURI, aResult); \
return NS_OK; \
} \
NS_IMETHOD IsDefaultNamespace(const nsAString& aNamespaceURI, bool* aResult) __VA_ARGS__ \
{ \
*aResult = nsINode::IsDefaultNamespace(aNamespaceURI); \
return NS_OK; \
} \
NS_IMETHOD LookupNamespaceURI(const nsAString& aPrefix, nsAString& aResult) __VA_ARGS__ \
{ \
nsINode::LookupNamespaceURI(aPrefix, aResult); \
return NS_OK; \
} \
NS_IMETHOD IsEqualNode(nsIDOMNode* aArg, bool* aResult) __VA_ARGS__ \
{ \
return nsINode::IsEqualNode(aArg, aResult); \
} \
NS_IMETHOD SetUserData(const nsAString& aKey, nsIVariant* aData, nsIDOMUserDataHandler* aHandler, nsIVariant** aResult) __VA_ARGS__ \
{ \
return nsINode::SetUserData(aKey, aData, aHandler, aResult); \
} \
NS_IMETHOD GetUserData(const nsAString& aKey, nsIVariant** aResult) __VA_ARGS__ \
{ \
return nsINode::GetUserData(aKey, aResult); \
} \
NS_IMETHOD Contains(nsIDOMNode* aOther, bool* aResult) __VA_ARGS__ \
{ \
return nsINode::Contains(aOther, aResult); \
}
#define NS_FORWARD_NSIDOMNODE_TO_NSINODE \
NS_FORWARD_NSIDOMNODE_TO_NSINODE_HELPER(MOZ_FINAL)
#define NS_FORWARD_NSIDOMNODE_TO_NSINODE_OVERRIDABLE \
NS_FORWARD_NSIDOMNODE_TO_NSINODE_HELPER()
#endif /* nsINode_h___ */
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