gecko/layout/forms/nsSelectsAreaFrame.h

86 lines
3.4 KiB
C++

/* -*- 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
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*
* 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.org 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):
*
* 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"),
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* ***** END LICENSE BLOCK ***** */
#ifndef nsSelectsAreaFrame_h___
#define nsSelectsAreaFrame_h___
#include "nsAreaFrame.h"
class nsIContent;
/**
* The area frame has an additional named child list:
* - "Absolute-list" which contains the absolutely positioned frames
*
* @see nsGkAtoms::absoluteList
*/
class nsSelectsAreaFrame : public nsAreaFrame
{
public:
friend nsIFrame* NS_NewSelectsAreaFrame(nsIPresShell* aShell, nsStyleContext* aContext, PRUint32 aFlags);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
nsresult BuildDisplayListInternal(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
NS_IMETHOD Reflow(nsPresContext* aCX,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
static PRBool IsOptionElement(nsIContent* aContent);
static PRBool IsOptionElementFrame(nsIFrame *aFrame);
nscoord HeightOfARow() const { return mHeightOfARow; }
protected:
nsSelectsAreaFrame(nsStyleContext* aContext) :
nsAreaFrame(aContext),
mHeightOfARow(0)
{}
// We cache the height of a single row so that changes to the "size"
// attribute, padding, etc. can all be handled with only one reflow. We'll
// have to reflow twice if someone changes our font size or something like
// that, so that the heights of our options will change.
nscoord mHeightOfARow;
};
#endif /* nsSelectsAreaFrame_h___ */