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nsXTFXULDisplayFrame.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 "nsBoxFrame.h"
00040 #include "nsIDOMElement.h"
00041 #include "nsIXTFVisualWrapperPrivate.h"
00042 #include "nsIAnonymousContentCreator.h"
00043 #include "nsXTFFrameUtils.h"
00044 
00045 typedef nsBoxFrame nsXTFXULDisplayFrameBase;
00046 
00047 class nsXTFXULDisplayFrame : public nsXTFXULDisplayFrameBase,
00048                              public nsIAnonymousContentCreator
00049 {
00050 public:
00051   friend nsresult
00052   NS_NewXTFXULDisplayFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
00053   
00054   nsXTFXULDisplayFrame(nsIPresShell* aPresShell);
00055 
00056   // nsISupports interface:
00057   NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
00058 private:
00059   NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
00060   NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }
00061   
00062 public:
00063   // nsIFrame
00064   virtual nsIFrame* GetContentInsertionFrame();
00065   virtual already_AddRefed<nsIContent> GetContentInsertionNode();
00066 
00067   NS_IMETHOD EndLayout(nsBoxLayoutState& aState);
00068   
00069   // nsIAnonymousContentCreator
00070   NS_IMETHOD CreateAnonymousContent(nsPresContext* aPresContext,
00071                                     nsISupportsArray& aAnonymousItems);
00072   
00073   // If the creator doesn't want to create special frame for frame hierarchy
00074   // then it should null out the style content arg and return NS_ERROR_FAILURE
00075   NS_IMETHOD CreateFrameFor(nsPresContext*   aPresContext,
00076                             nsIContent *      aContent,
00077                             nsIFrame**        aFrame) {
00078     if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }  
00079 };
00080 
00081 //----------------------------------------------------------------------
00082 // Implementation
00083 
00084 nsresult
00085 NS_NewXTFXULDisplayFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
00086 {
00087   nsXTFXULDisplayFrame* it = new (aPresShell) nsXTFXULDisplayFrame(aPresShell);
00088   if (nsnull == it)
00089     return NS_ERROR_OUT_OF_MEMORY;
00090 
00091   *aNewFrame = it;
00092 
00093   return NS_OK;
00094 }
00095 
00096 nsXTFXULDisplayFrame::nsXTFXULDisplayFrame(nsIPresShell* aPresShell)
00097     : nsXTFXULDisplayFrameBase(aPresShell, PR_FALSE, nsnull)
00098 {}
00099 
00100 //----------------------------------------------------------------------
00101 // nsISupports methods
00102 
00103 NS_INTERFACE_MAP_BEGIN(nsXTFXULDisplayFrame)
00104   NS_INTERFACE_MAP_ENTRY(nsIAnonymousContentCreator)
00105 NS_INTERFACE_MAP_END_INHERITING(nsXTFXULDisplayFrameBase)
00106 
00107 //----------------------------------------------------------------------
00108 // nsIFrame mehthods
00109 
00110 nsIFrame*
00111 nsXTFXULDisplayFrame::GetContentInsertionFrame()
00112 {
00113   return nsXTFFrameUtils::GetContentInsertionFrame(this);
00114 }
00115 
00116 already_AddRefed<nsIContent>
00117 nsXTFXULDisplayFrame::GetContentInsertionNode()
00118 {
00119   return nsXTFFrameUtils::GetContentInsertionNode(this);
00120 }
00121 
00122 NS_IMETHODIMP
00123 nsXTFXULDisplayFrame::EndLayout(nsBoxLayoutState& aState)
00124 {
00125   nsresult rv = nsXTFXULDisplayFrameBase::EndLayout(aState);
00126   nsCOMPtr<nsIXTFVisualWrapperPrivate> visual = do_QueryInterface(mContent);
00127   NS_ASSERTION(visual, "huh? associated content not implementing nsIXTFVisualWrapperPrivate");
00128   visual->DidLayout();
00129   
00130   return rv;
00131 }
00132 
00133 //----------------------------------------------------------------------
00134 // nsIAnonymousContentCreator methods:
00135 
00136 NS_IMETHODIMP
00137 nsXTFXULDisplayFrame::CreateAnonymousContent(nsPresContext* aPresContext,
00138                                              nsISupportsArray& aAnonymousItems)
00139 {
00140   nsCOMPtr<nsIXTFVisualWrapperPrivate> visual = do_QueryInterface(mContent);
00141   NS_ASSERTION(visual, "huh? associated content not implementing nsIXTFVisualWrapperPrivate");
00142   return visual->CreateAnonymousContent(aPresContext, aAnonymousItems);
00143 }