gecko/layout/xul/base/src/nsListItemFrame.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   David W. Hyatt (hyatt@netscape.com) (Original Author)
 *   Joe Hewitt (hewitt@netscape.com)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsListItemFrame.h"

#include "nsCOMPtr.h"
#include "nsINameSpaceManager.h" 
#include "nsGkAtoms.h"
#include "nsDisplayList.h"

NS_IMETHODIMP_(nsrefcnt) 
nsListItemFrame::AddRef(void)
{
  return NS_OK;
}

NS_IMETHODIMP_(nsrefcnt)
nsListItemFrame::Release(void)
{
  return NS_OK;
}

NS_INTERFACE_MAP_BEGIN(nsListItemFrame)
NS_INTERFACE_MAP_END_INHERITING(nsGridRowLeafFrame)

nsListItemFrame::nsListItemFrame(nsIPresShell* aPresShell,
                                 nsStyleContext* aContext,
                                 PRBool aIsRoot,
                                 nsIBoxLayout* aLayoutManager)
  : nsGridRowLeafFrame(aPresShell, aContext, aIsRoot, aLayoutManager) 
{
}

nsListItemFrame::~nsListItemFrame()
{
}

nsSize
nsListItemFrame::GetPrefSize(nsBoxLayoutState& aState)
{
  nsSize size = nsBoxFrame::GetPrefSize(aState);  
  DISPLAY_PREF_SIZE(this, size);

  // guarantee that our preferred height doesn't exceed the standard
  // listbox row height
  size.height = PR_MAX(mRect.height, size.height);
  return size;
}

NS_IMETHODIMP
nsListItemFrame::BuildDisplayListForChildren(nsDisplayListBuilder*   aBuilder,
                                             const nsRect&           aDirtyRect,
                                             const nsDisplayListSet& aLists)
{
  if (aBuilder->IsForEventDelivery()) {
    if (!mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::allowevents,
                               nsGkAtoms::_true, eCaseMatters))
      return NS_OK;
  }
  
  return nsGridRowLeafFrame::BuildDisplayListForChildren(aBuilder, aDirtyRect, aLists);
}

// Creation Routine ///////////////////////////////////////////////////////////////////////

nsIFrame*
NS_NewListItemFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRBool aIsRoot, nsIBoxLayout* aLayoutManager)
{
  return new (aPresShell) nsListItemFrame(aPresShell, aContext, aIsRoot, aLayoutManager);
} // NS_NewListItemFrame