pjs/layout/generic/nsLeafFrame.cpp

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/* -*- 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
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*
* 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/
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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.
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*
* 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"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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*
* ***** END LICENSE BLOCK ***** */
/* base class for rendering objects that do not have child lists */
#include "nsCOMPtr.h"
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#include "nsLeafFrame.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsHTMLParts.h"
#include "nsPresContext.h"
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nsLeafFrame::~nsLeafFrame()
{
}
NS_IMPL_FRAMEARENA_HELPERS(nsLeafFrame)
/* virtual */ nscoord
nsLeafFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
result = GetIntrinsicWidth();
return result;
}
/* virtual */ nscoord
nsLeafFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_PREF_WIDTH(this, result);
result = GetIntrinsicWidth();
return result;
}
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/* virtual */ nsSize
nsLeafFrame::ComputeAutoSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, PRBool aShrinkWrap)
{
return nsSize(GetIntrinsicWidth(), GetIntrinsicHeight());
}
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NS_IMETHODIMP
nsLeafFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
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{
DO_GLOBAL_REFLOW_COUNT("nsLeafFrame");
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsLeafFrame::Reflow: aMaxSize=%d,%d",
aReflowState.availableWidth, aReflowState.availableHeight));
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NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
DoReflow(aPresContext, aMetrics, aReflowState, aStatus);
FinishAndStoreOverflow(&aMetrics);
return NS_OK;
}
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NS_IMETHODIMP
nsLeafFrame::DoReflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
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NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
"Shouldn't have unconstrained stuff here "
"Thanks to the rules of reflow");
NS_ASSERTION(NS_INTRINSICSIZE != aReflowState.ComputedHeight(),
"Shouldn't have unconstrained stuff here "
"thanks to ComputeAutoSize");
aMetrics.width = aReflowState.ComputedWidth();
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aMetrics.height = aReflowState.ComputedHeight();
AddBordersAndPadding(aReflowState, aMetrics);
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsLeafFrame::DoReflow: size=%d,%d",
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aMetrics.width, aMetrics.height));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
aMetrics.SetOverflowAreasToDesiredBounds();
return NS_OK;
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}
nscoord
nsLeafFrame::GetIntrinsicHeight()
{
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NS_NOTREACHED("Someone didn't override Reflow or ComputeAutoSize");
return 0;
}
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// XXX how should border&padding effect baseline alignment?
// => descent = borderPadding.bottom for example
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void
nsLeafFrame::AddBordersAndPadding(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics)
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{
aMetrics.width += aReflowState.mComputedBorderPadding.LeftRight();
aMetrics.height += aReflowState.mComputedBorderPadding.TopBottom();
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}
void
nsLeafFrame::SizeToAvailSize(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize)
{
aDesiredSize.width = aReflowState.availableWidth; // FRAME
aDesiredSize.height = aReflowState.availableHeight;
aDesiredSize.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aDesiredSize);
}