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lightning-sunbird  0.9+nobinonly
nsXTFSVGDisplayFrame.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is the Mozilla XTF project.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Alex Fritze.
00019  * Portions created by the Initial Developer are Copyright (C) 2004
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Alex Fritze <alex@croczilla.com> (original author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsCOMPtr.h"
00040 #include "nsContainerFrame.h"
00041 #include "nsPresContext.h"
00042 #include "nsISupportsArray.h"
00043 #include "nsSVGGenericContainerFrame.h"
00044 #include "nsIXTFVisualWrapperPrivate.h"
00045 #include "nsIAnonymousContentCreator.h"
00046 
00047 typedef nsSVGGenericContainerFrame nsXTFSVGDisplayFrameBase;
00048 
00049 class nsXTFSVGDisplayFrame : public nsXTFSVGDisplayFrameBase,
00050                              public nsIAnonymousContentCreator
00051 {
00052 public:
00053   friend nsresult
00054   NS_NewXTFSVGDisplayFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame);
00055   // nsISupports interface:
00056   NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
00057 private:
00058   NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
00059   NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }
00060 
00061 protected:
00062   // nsIAnonymousContentCreator
00063   NS_IMETHOD CreateAnonymousContent(nsPresContext* aPresContext,
00064                                     nsISupportsArray& aAnonymousItems);
00065   
00066   // If the creator doesn't want to create special frame for frame hierarchy
00067   // then it should null out the style content arg and return NS_ERROR_FAILURE
00068   NS_IMETHOD CreateFrameFor(nsPresContext*   aPresContext,
00069                             nsIContent *      aContent,
00070                             nsIFrame**        aFrame) {
00071     if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }  
00072 };
00073 
00074 //----------------------------------------------------------------------
00075 // Implementation
00076 
00077 nsresult
00078 NS_NewXTFSVGDisplayFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsIFrame** aNewFrame)
00079 {
00080   nsXTFSVGDisplayFrame* it = new (aPresShell) nsXTFSVGDisplayFrame;
00081   if (nsnull == it)
00082     return NS_ERROR_OUT_OF_MEMORY;
00083 
00084   *aNewFrame = it;
00085 
00086   return NS_OK;
00087 }
00088 
00089 //----------------------------------------------------------------------
00090 // nsISupports methods
00091 
00092 NS_INTERFACE_MAP_BEGIN(nsXTFSVGDisplayFrame)
00093   NS_INTERFACE_MAP_ENTRY(nsIAnonymousContentCreator)
00094 NS_INTERFACE_MAP_END_INHERITING(nsXTFSVGDisplayFrameBase)
00095 
00096 
00097 //----------------------------------------------------------------------
00098 // nsIAnonymousContentCreator methods:
00099 
00100 NS_IMETHODIMP
00101 nsXTFSVGDisplayFrame::CreateAnonymousContent(nsPresContext* aPresContext,
00102                                              nsISupportsArray& aAnonymousItems)
00103 {
00104   nsCOMPtr<nsIXTFVisualWrapperPrivate> visual = do_QueryInterface(mContent);
00105   NS_ASSERTION(visual, "huh? associated content not implementing nsIXTFVisualWrapperPrivate");
00106   return visual->CreateAnonymousContent(aPresContext, aAnonymousItems);
00107 }