gecko-dev/layout/generic/nsLeafFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* base class for rendering objects that do not have child lists */
#include "nsCOMPtr.h"
#include "nsLeafFrame.h"
#include "nsHTMLContainerFrame.h"
#include "nsHTMLParts.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
nsLeafFrame::~nsLeafFrame()
{
}
/* virtual */ nscoord
nsLeafFrame::GetMinWidth(nsIRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
result = GetIntrinsicWidth();
return result;
}
/* virtual */ nscoord
nsLeafFrame::GetPrefWidth(nsIRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_PREF_WIDTH(this, result);
result = GetIntrinsicWidth();
return result;
}
NS_IMETHODIMP
nsLeafFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsLeafFrame");
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsLeafFrame::Reflow: aMaxSize=%d,%d",
aReflowState.availableWidth, aReflowState.availableHeight));
NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
// XXX add in code to check for width/height being set via css
// and if set use them instead of calling GetDesiredSize.
NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
"Shouldn't have unconstrained stuff here");
aMetrics.width = aReflowState.ComputedWidth();
if (NS_INTRINSICSIZE != aReflowState.mComputedHeight) {
aMetrics.height = aReflowState.mComputedHeight;
} else {
aMetrics.height = GetIntrinsicHeight();
// XXXbz using NS_CSS_MINMAX like this presupposes content-box sizing.
aMetrics.height = NS_CSS_MINMAX(aMetrics.height,
aReflowState.mComputedMinHeight,
aReflowState.mComputedMaxHeight);
}
AddBordersAndPadding(aReflowState, aMetrics);
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsLeafFrame::Reflow: size=%d,%d",
aMetrics.width, aMetrics.height));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
aMetrics.mOverflowArea =
nsRect(0, 0, aMetrics.width, aMetrics.height);
FinishAndStoreOverflow(&aMetrics);
return NS_OK;
}
PRBool
nsLeafFrame::IsFrameOfType(PRUint32 aFlags) const
{
// We don't actually contain a block, but we do always want a
// computed width, so tell a little white lie here.
return !(aFlags & ~nsIFrame::eReplacedContainsBlock);
}
nscoord
nsLeafFrame::GetIntrinsicHeight()
{
NS_NOTREACHED("Someone didn't override Reflow");
return 0;
}
// XXX how should border&padding effect baseline alignment?
// => descent = borderPadding.bottom for example
void
nsLeafFrame::AddBordersAndPadding(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics)
{
aMetrics.width += aReflowState.mComputedBorderPadding.LeftRight();
aMetrics.height += aReflowState.mComputedBorderPadding.TopBottom();
}
void
nsLeafFrame::SizeToAvailSize(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize)
{
aDesiredSize.width = aReflowState.availableWidth; // FRAME
aDesiredSize.height = aReflowState.availableHeight;
aDesiredSize.mOverflowArea =
nsRect(0, 0, aDesiredSize.width, aDesiredSize.height);
FinishAndStoreOverflow(&aDesiredSize);
}