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388 lines
11 KiB
C++
388 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* nsINodeInfo is an interface to node info, such as name, prefix, namespace
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* ID and possibly other data that is shared between nodes (elements
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* and attributes) that have the same name, prefix and namespace ID within
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* the same document.
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*
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* nsNodeInfoManager's are internal objects that manage a list of
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* nsINodeInfo's, every document object should hold a strong reference to
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* a nsNodeInfoManager and every nsINodeInfo also holds a strong reference
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* to their owning manager. When a nsINodeInfo is no longer used it will
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* automatically remove itself from its owner manager, and when all
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* nsINodeInfo's have been removed from a nsNodeInfoManager and all external
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* references are released the nsNodeInfoManager deletes itself.
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*
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* -- jst@netscape.com
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*/
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#ifndef nsINodeInfo_h___
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#define nsINodeInfo_h___
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#include "nsISupports.h"
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#include "nsIAtom.h"
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#include "nsINameSpaceManager.h"
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#include "nsNodeInfoManager.h"
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#include "nsCOMPtr.h"
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#ifdef MOZILLA_INTERNAL_API
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#include "nsDOMString.h"
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#endif
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// Forward declarations
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class nsIDocument;
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class nsIURI;
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class nsIPrincipal;
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// IID for the nsINodeInfo interface
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#define NS_INODEINFO_IID \
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{ 0xc5188ea1, 0x0a9c, 0x43e6, \
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{ 0x95, 0x90, 0xcc, 0x43, 0x6b, 0xe9, 0xcf, 0xa0 } }
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class nsINodeInfo : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_INODEINFO_IID)
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nsINodeInfo()
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: mInner(nsnull, nsnull, kNameSpaceID_None, 0, nsnull),
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mOwnerManager(nsnull)
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{
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}
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/*
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* Get the name from this node as a string, this does not include the prefix.
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*
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* For the HTML element "<body>" this will return "body" and for the XML
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* element "<html:body>" this will return "body".
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*/
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void GetName(nsAString& aName) const
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{
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mInner.mName->ToString(aName);
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}
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/*
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* Get the name from this node as an atom, this does not include the prefix.
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* This function never returns a null atom.
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*
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* For the HTML element "<body>" this will return the "body" atom and for
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* the XML element "<html:body>" this will return the "body" atom.
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*/
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nsIAtom* NameAtom() const
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{
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return mInner.mName;
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}
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/*
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* Get the qualified name from this node as a string, the qualified name
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* includes the prefix, if one exists.
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*
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* For the HTML element "<body>" this will return "body" and for the XML
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* element "<html:body>" this will return "html:body".
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*/
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const nsString& QualifiedName() const {
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return mQualifiedName;
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}
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/*
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* Returns the node's nodeName as defined in DOM Core
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*/
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const nsString& NodeName() const {
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return mNodeName;
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}
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/*
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* Returns the node's localName as defined in DOM Core
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*/
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const nsString& LocalName() const {
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return mLocalName;
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}
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#ifdef MOZILLA_INTERNAL_API
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/*
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* Get the prefix from this node as a string.
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*
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* For the HTML element "<body>" this will return a null string and for
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* the XML element "<html:body>" this will return the string "html".
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*/
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void GetPrefix(nsAString& aPrefix) const
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{
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if (mInner.mPrefix) {
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mInner.mPrefix->ToString(aPrefix);
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} else {
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SetDOMStringToNull(aPrefix);
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}
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}
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#endif
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/*
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* Get the prefix from this node as an atom.
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*
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* For the HTML element "<body>" this will return a null atom and for
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* the XML element "<html:body>" this will return the "html" atom.
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*/
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nsIAtom* GetPrefixAtom() const
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{
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return mInner.mPrefix;
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}
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/*
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* Get the namespace URI for a node, if the node has a namespace URI.
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*/
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virtual nsresult GetNamespaceURI(nsAString& aNameSpaceURI) const = 0;
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/*
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* Get the namespace ID for a node if the node has a namespace, if not this
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* returns kNameSpaceID_None.
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*/
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PRInt32 NamespaceID() const
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{
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return mInner.mNamespaceID;
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}
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/*
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* Get the nodetype for the node. Returns the values specified in nsIDOMNode
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* for nsIDOMNode.nodeType
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*/
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PRUint16 NodeType() const
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{
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return mInner.mNodeType;
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}
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/*
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* Get the extra name, used by PIs and DocTypes, for the node.
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*/
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nsIAtom* GetExtraName() const
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{
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return mInner.mExtraName;
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}
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/*
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* Get and set the ID attribute atom for this node.
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* See http://www.w3.org/TR/1998/REC-xml-19980210#sec-attribute-types
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* for the definition of an ID attribute.
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*
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*/
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nsIAtom* GetIDAttributeAtom() const
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{
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return mIDAttributeAtom;
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}
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void SetIDAttributeAtom(nsIAtom* aID)
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{
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mIDAttributeAtom = aID;
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}
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/**
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* Get the owning node info manager. Only to be used inside Gecko, you can't
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* really do anything with the pointer outside Gecko anyway.
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*/
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nsNodeInfoManager *NodeInfoManager() const
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{
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return mOwnerManager;
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}
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/*
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* Utility functions that can be used to check if a nodeinfo holds a specific
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* name, name and prefix, name and prefix and namespace ID, or just
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* namespace ID.
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*/
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bool Equals(nsINodeInfo *aNodeInfo) const
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{
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return aNodeInfo == this || aNodeInfo->Equals(mInner.mName, mInner.mPrefix,
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mInner.mNamespaceID);
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}
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bool NameAndNamespaceEquals(nsINodeInfo *aNodeInfo) const
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{
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return aNodeInfo == this || aNodeInfo->Equals(mInner.mName,
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mInner.mNamespaceID);
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}
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bool Equals(nsIAtom *aNameAtom) const
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{
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return mInner.mName == aNameAtom;
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}
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bool Equals(nsIAtom *aNameAtom, nsIAtom *aPrefixAtom) const
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{
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return (mInner.mName == aNameAtom) && (mInner.mPrefix == aPrefixAtom);
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}
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bool Equals(nsIAtom *aNameAtom, PRInt32 aNamespaceID) const
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{
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return ((mInner.mName == aNameAtom) &&
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(mInner.mNamespaceID == aNamespaceID));
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}
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bool Equals(nsIAtom *aNameAtom, nsIAtom *aPrefixAtom,
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PRInt32 aNamespaceID) const
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{
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return ((mInner.mName == aNameAtom) &&
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(mInner.mPrefix == aPrefixAtom) &&
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(mInner.mNamespaceID == aNamespaceID));
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}
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bool NamespaceEquals(PRInt32 aNamespaceID) const
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{
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return mInner.mNamespaceID == aNamespaceID;
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}
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bool Equals(const nsAString& aName) const
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{
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return mInner.mName->Equals(aName);
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}
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bool Equals(const nsAString& aName, const nsAString& aPrefix) const
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{
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return mInner.mName->Equals(aName) &&
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(mInner.mPrefix ? mInner.mPrefix->Equals(aPrefix) : aPrefix.IsEmpty());
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}
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bool Equals(const nsAString& aName, PRInt32 aNamespaceID) const
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{
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return mInner.mNamespaceID == aNamespaceID &&
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mInner.mName->Equals(aName);
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}
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bool Equals(const nsAString& aName, const nsAString& aPrefix,
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PRInt32 aNamespaceID) const
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{
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return mInner.mName->Equals(aName) && mInner.mNamespaceID == aNamespaceID &&
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(mInner.mPrefix ? mInner.mPrefix->Equals(aPrefix) : aPrefix.IsEmpty());
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}
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virtual bool NamespaceEquals(const nsAString& aNamespaceURI) const = 0;
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bool QualifiedNameEquals(nsIAtom* aNameAtom) const
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{
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NS_PRECONDITION(aNameAtom, "Must have name atom");
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if (!GetPrefixAtom())
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return Equals(aNameAtom);
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return aNameAtom->Equals(mQualifiedName);
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}
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bool QualifiedNameEquals(const nsAString& aQualifiedName) const
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{
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return mQualifiedName == aQualifiedName;
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}
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/*
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* Retrieve a pointer to the document that owns this node info.
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*/
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nsIDocument* GetDocument() const
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{
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return mDocument;
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}
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protected:
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/*
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* nsNodeInfoInner is used for two things:
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*
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* 1. as a member in nsNodeInfo for holding the name, prefix and
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* namespace ID
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* 2. as the hash key in the hash table in nsNodeInfoManager
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*
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* nsNodeInfoInner does not do any kind of reference counting,
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* that's up to the user of this class. Since nsNodeInfoInner is
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* typically used as a member of nsNodeInfo, the hash table doesn't
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* need to delete the keys. When the value (nsNodeInfo) is deleted
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* the key is automatically deleted.
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*/
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class nsNodeInfoInner
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{
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public:
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nsNodeInfoInner()
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: mName(nsnull), mPrefix(nsnull), mNamespaceID(kNameSpaceID_Unknown),
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mNodeType(0), mNameString(nsnull), mExtraName(nsnull)
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{
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}
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nsNodeInfoInner(nsIAtom *aName, nsIAtom *aPrefix, PRInt32 aNamespaceID,
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PRUint16 aNodeType, nsIAtom* aExtraName)
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: mName(aName), mPrefix(aPrefix), mNamespaceID(aNamespaceID),
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mNodeType(aNodeType), mNameString(nsnull), mExtraName(aExtraName)
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{
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}
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nsNodeInfoInner(const nsAString& aTmpName, nsIAtom *aPrefix,
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PRInt32 aNamespaceID, PRUint16 aNodeType)
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: mName(nsnull), mPrefix(aPrefix), mNamespaceID(aNamespaceID),
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mNodeType(aNodeType), mNameString(&aTmpName), mExtraName(nsnull)
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{
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}
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nsIAtom* mName;
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nsIAtom* mPrefix;
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PRInt32 mNamespaceID;
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PRUint16 mNodeType; // As defined by nsIDOMNode.nodeType
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const nsAString* mNameString;
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nsIAtom* mExtraName; // Only used by PIs and DocTypes
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};
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// nsNodeInfoManager needs to pass mInner to the hash table.
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friend class nsNodeInfoManager;
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nsIDocument* mDocument; // Weak. Cache of mOwnerManager->mDocument
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nsNodeInfoInner mInner;
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nsCOMPtr<nsIAtom> mIDAttributeAtom;
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nsNodeInfoManager* mOwnerManager; // Strong reference!
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/*
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* Members for various functions of mName+mPrefix that we can be
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* asked to compute.
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*/
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// Qualified name
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nsString mQualifiedName;
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// nodeName for the node.
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nsString mNodeName;
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// localName for the node. This is either equal to mInner.mName, or a
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// void string, depending on mInner.mNodeType.
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nsString mLocalName;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsINodeInfo, NS_INODEINFO_IID)
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#endif /* nsINodeInfo_h___ */
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