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lightning-sunbird  0.9+nobinonly
nsXTFFrameUtils.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  * IBM Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 2004
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Brian Ryner <bryner@brianryner.com>
00024  *   Alex Fritze <alex@croczilla.com>
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either the GNU General Public License Version 2 or later (the "GPL"), or
00028  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
00031  * under the terms of either the GPL or the LGPL, and not to allow others to
00032  * use your version of this file under the terms of the MPL, indicate your
00033  * decision by deleting the provisions above and replace them with the notice
00034  * and other provisions required by the GPL or the LGPL. If you do not delete
00035  * the provisions above, a recipient may use your version of this file under
00036  * the terms of any one of the MPL, the GPL or the LGPL.
00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #include "nsXTFFrameUtils.h"
00041 #include "nsIFrame.h"
00042 #include "nsIXTFVisualWrapperPrivate.h"
00043 #include "nsIDOMElement.h"
00044 
00045 nsIFrame*
00046 nsXTFFrameUtils::GetContentInsertionFrame(nsIFrame *aFrame)
00047 {
00048   nsCOMPtr<nsIContent> content =
00049     nsXTFFrameUtils::GetContentInsertionNode(aFrame);
00050 
00051   NS_ASSERTION(content, "element not implementing nsIContent!?");
00052 
00053   nsIFrame* insertionFrame = nsnull;
00054   aFrame->GetPresContext()->PresShell()->GetPrimaryFrameFor(content,
00055                                                      &insertionFrame);
00056   return insertionFrame;
00057 }
00058 
00059 
00060 already_AddRefed<nsIContent>
00061 nsXTFFrameUtils::GetContentInsertionNode(nsIFrame *aFrame)
00062 {
00063   nsCOMPtr<nsIXTFVisualWrapperPrivate> visual =
00064     do_QueryInterface(aFrame->GetContent());
00065   NS_ASSERTION(visual, "huh? associated content not implementing nsIXTFVisualWrapperPrivate");
00066 
00067   nsCOMPtr<nsIDOMElement> childInsertionPoint;
00068   visual->GetInsertionPoint(getter_AddRefs(childInsertionPoint));
00069   if (!childInsertionPoint) return nsnull; // we don't take visual child content
00070 
00071   nsIContent *content = nsnull;
00072   CallQueryInterface(childInsertionPoint, &content);
00073   return content;
00074 }
00075