mirror of
https://github.com/rn10950/RetroZilla.git
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312 lines
10 KiB
C
312 lines
10 KiB
C
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/* -*- 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 "nsAString.h"
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#include "nsDOMString.h"
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#include "nsINameSpaceManager.h"
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#include "nsCOMPtr.h"
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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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class nsNodeInfoManager;
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// IID for the nsINodeInfo interface
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#define NS_INODEINFO_IID \
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{ 0x290ecd20, 0xb3cb, 0x11d8, \
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{ 0xb2, 0x67, 0x00, 0x0a, 0x95, 0xdc, 0x23, 0x4c } }
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class nsINodeInfo : public nsISupports
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{
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public:
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NS_DEFINE_STATIC_IID_ACCESSOR(NS_INODEINFO_IID)
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nsINodeInfo()
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: mInner(nsnull, nsnull, kNameSpaceID_None),
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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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virtual void GetQualifiedName(nsAString& aQualifiedName) const = 0;
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/*
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* Get the local name from this node as a string, GetLocalName() gets the
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* same string as GetName() but only if the node has a prefix and/or a
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* namespace URI. If the node has neither a prefix nor a namespace URI the
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* local name is a null string.
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*
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* For the HTML element "<body>" in a HTML document this will return a null
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* string and for the XML element "<html:body>" this will return "body".
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*/
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virtual void GetLocalName(nsAString& aLocalName) const = 0;
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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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/*
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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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* For the HTML element "<body>" in a HTML document this will return a null
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* string and for the XML element "<html:body>" (assuming that this element,
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* or one of it's ancestors has an
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* xmlns:html='http://www.w3.org/1999/xhtml' attribute) this will return
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* the string "http://www.w3.org/1999/xhtml".
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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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* For the HTML element "<body>" in a HTML document this will return
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* kNameSpaceID_None and for the XML element "<html:body>" (assuming that
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* this element, or one of it's ancestors has an
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* xmlns:html='http://www.w3.org/1999/xhtml' attribute) this will return
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* the namespace ID for "http://www.w3.org/1999/xhtml".
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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 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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PRBool 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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PRBool 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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PRBool Equals(nsIAtom *aNameAtom) const
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{
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return mInner.mName == aNameAtom;
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}
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PRBool 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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PRBool 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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PRBool 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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PRBool NamespaceEquals(PRInt32 aNamespaceID) const
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{
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return mInner.mNamespaceID == aNamespaceID;
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}
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virtual PRBool Equals(const nsAString& aName) const = 0;
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virtual PRBool Equals(const nsAString& aName,
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const nsAString& aPrefix) const = 0;
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virtual PRBool Equals(const nsAString& aName,
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PRInt32 aNamespaceID) const = 0;
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virtual PRBool Equals(const nsAString& aName, const nsAString& aPrefix,
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PRInt32 aNamespaceID) const = 0;
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virtual PRBool NamespaceEquals(const nsAString& aNamespaceURI) const = 0;
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// switch to UTF8 - this allows faster access for consumers
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virtual PRBool QualifiedNameEquals(const nsACString& aQualifiedName) const = 0;
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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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virtual nsIDocument* GetDocument() const = 0;
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/*
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* Retrieve a pointer to the principal for the document of this node info.
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*/
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virtual nsIPrincipal *GetDocumentPrincipal() const = 0;
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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(nsIAtom *aName, nsIAtom *aPrefix, PRInt32 aNamespaceID)
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: mName(aName), mPrefix(aPrefix), mNamespaceID(aNamespaceID)
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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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};
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// nsNodeInfoManager needs to pass mInner to the hash table.
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friend class nsNodeInfoManager;
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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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#endif /* nsINodeInfo_h___ */
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