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101 lines
3.7 KiB
C++
101 lines
3.7 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.org 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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* interface for rendering objects that manually create subtrees of
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* anonymous content
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*/
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#ifndef nsIAnonymousContentCreator_h___
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#define nsIAnonymousContentCreator_h___
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#include "nsISupports.h"
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#include "nsIContent.h"
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class nsPresContext;
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class nsIFrame;
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template <class T> class nsTArray;
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// {7568a516-3831-4db4-88a7-a42578acc136}
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#define NS_IANONYMOUS_CONTENT_CREATOR_IID \
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{ 0x7568a516, 0x3831, 0x4db4, \
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{ 0x88, 0xa7, 0xa4, 0x25, 0x78, 0xac, 0xc1, 0x36 } }
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/**
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* Any source for anonymous content can implement this interface to provide it.
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* HTML frames like nsFileControlFrame currently use this as well as XUL frames
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* like nsScrollbarFrame and nsSliderFrame.
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*
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* @see nsCSSFrameConstructor
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*/
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class nsIAnonymousContentCreator : public nsISupports {
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IANONYMOUS_CONTENT_CREATOR_IID)
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/**
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* Creates "native" anonymous content and adds the created content to
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* the aElements array. None of the returned elements can be nsnull.
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*
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* @note The returned elements are owned by this object. This object is
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* responsible for calling UnbindFromTree on the elements it returned
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* from CreateAnonymousContent when appropriate (i.e. before releasing
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* them).
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*/
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virtual nsresult CreateAnonymousContent(nsTArray<nsIContent*>& aElements)=0;
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/**
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* Implementations can override this method to create special frames for the
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* anonymous content returned from CreateAnonymousContent.
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* By default this method returns nsnull, which means the default frame
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* is created.
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*/
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virtual nsIFrame* CreateFrameFor(nsIContent* aContent) { return nsnull; }
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/**
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* This gets called after the frames for the anonymous content have been
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* created and added to the frame tree. By default it does nothing.
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*/
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virtual void PostCreateFrames() {}
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIAnonymousContentCreator,
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NS_IANONYMOUS_CONTENT_CREATOR_IID)
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#endif
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