Back to index

lightning-sunbird  0.9+nobinonly
nsListItemFrame.cpp
Go to the documentation of this file.
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 Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   David W. Hyatt (hyatt@netscape.com) (Original Author)
00024  *   Joe Hewitt (hewitt@netscape.com)
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either of the GNU General Public License Version 2 or later (the "GPL"),
00028  * or 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 "nsListItemFrame.h"
00041 
00042 #include "nsCOMPtr.h"
00043 #include "nsINameSpaceManager.h" 
00044 #include "nsXULAtoms.h"
00045 
00046 NS_IMETHODIMP_(nsrefcnt) 
00047 nsListItemFrame::AddRef(void)
00048 {
00049   return NS_OK;
00050 }
00051 
00052 NS_IMETHODIMP_(nsrefcnt)
00053 nsListItemFrame::Release(void)
00054 {
00055   return NS_OK;
00056 }
00057 
00058 NS_INTERFACE_MAP_BEGIN(nsListItemFrame)
00059 NS_INTERFACE_MAP_END_INHERITING(nsGridRowLeafFrame)
00060 
00061 nsListItemFrame::nsListItemFrame(nsIPresShell* aPresShell, PRBool aIsRoot, nsIBoxLayout* aLayoutManager)
00062   : nsGridRowLeafFrame(aPresShell, aIsRoot, aLayoutManager) 
00063 {
00064 }
00065 
00066 nsListItemFrame::~nsListItemFrame()
00067 {
00068 }
00069 
00070 nsresult
00071 nsListItemFrame::GetPrefSize(nsBoxLayoutState& aState, nsSize& aSize)
00072 {
00073   nsresult rv = nsBoxFrame::GetPrefSize(aState, aSize);
00074   if (NS_FAILED(rv)) return rv;
00075 
00076   // guarantee that our preferred height doesn't exceed the standard
00077   // listbox row height
00078   aSize.height = PR_MAX(mRect.height, aSize.height);
00079   return NS_OK;
00080 }
00081 
00082 NS_IMETHODIMP
00083 nsListItemFrame::GetFrameForPoint(const nsPoint& aPoint, 
00084                                      nsFramePaintLayer aWhichLayer,
00085                                      nsIFrame**     aFrame)
00086 {
00087   nsAutoString value;
00088   mContent->GetAttr(kNameSpaceID_None, nsXULAtoms::allowevents, value);
00089   if (value.EqualsLiteral("true")) {
00090     return nsBoxFrame::GetFrameForPoint(aPoint, aWhichLayer, aFrame);
00091   }
00092   else if (mRect.Contains(aPoint)) {
00093     if (GetStyleVisibility()->IsVisible()) {
00094       *aFrame = this; // Capture all events so that we can perform selection and expand/collapse.
00095       return NS_OK;
00096     }
00097   }
00098   return NS_ERROR_FAILURE;
00099 }
00100 
00101 // Creation Routine ///////////////////////////////////////////////////////////////////////
00102 
00103 nsresult
00104 NS_NewListItemFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRBool aIsRoot, 
00105                         nsIBoxLayout* aLayoutManager)
00106 {
00107   NS_PRECONDITION(aNewFrame, "null OUT ptr");
00108   if (nsnull == aNewFrame) {
00109     return NS_ERROR_NULL_POINTER;
00110   }
00111   nsListItemFrame* it = new (aPresShell) nsListItemFrame(aPresShell, aIsRoot, aLayoutManager);
00112   if (!it)
00113     return NS_ERROR_OUT_OF_MEMORY;
00114 
00115   *aNewFrame = it;
00116   return NS_OK;
00117   
00118 } // NS_NewListItemFrame
00119