RetroZilla/layout/generic/nsLeafFrame.cpp

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#include "nsCOMPtr.h"
#include "nsLeafFrame.h"
#include "nsHTMLContainerFrame.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"

nsLeafFrame::~nsLeafFrame()
{
}

NS_IMETHODIMP
nsLeafFrame::Paint(nsPresContext*      aPresContext,
                   nsIRenderingContext& aRenderingContext,
                   const nsRect&        aDirtyRect,
                   nsFramePaintLayer    aWhichLayer,
                   PRUint32             aFlags)
{
  if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
    PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
  }
  DO_GLOBAL_REFLOW_COUNT_DSP("nsLeafFrame", &aRenderingContext);
  return NS_OK;
}

NS_IMETHODIMP
nsLeafFrame::Reflow(nsPresContext* aPresContext,
                    nsHTMLReflowMetrics& aMetrics,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus& aStatus)
{
  DO_GLOBAL_REFLOW_COUNT("nsLeafFrame", aReflowState.reason);
  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.


  GetDesiredSize(aPresContext, aReflowState, aMetrics);
  nsMargin borderPadding;
  AddBordersAndPadding(aPresContext, aReflowState, aMetrics, borderPadding);
  if (aMetrics.mComputeMEW) {
    aMetrics.SetMEWToActualWidth(aReflowState.mStylePosition->mWidth.GetUnit());
  }
  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);
  return NS_OK;
}

// XXX how should border&padding effect baseline alignment?
// => descent = borderPadding.bottom for example
void
nsLeafFrame::AddBordersAndPadding(nsPresContext* aPresContext,
                                  const nsHTMLReflowState& aReflowState,
                                  nsHTMLReflowMetrics& aMetrics,
                                  nsMargin& aBorderPadding)
{
  aBorderPadding = aReflowState.mComputedBorderPadding;
  aMetrics.width += aBorderPadding.left + aBorderPadding.right;
  aMetrics.height += aBorderPadding.top + aBorderPadding.bottom;
  aMetrics.ascent = aMetrics.height;
  aMetrics.descent = 0;
}