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lightning-sunbird  0.9+nobinonly
nsLeafFrame.cpp
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00037 #include "nsCOMPtr.h"
00038 #include "nsLeafFrame.h"
00039 #include "nsHTMLContainerFrame.h"
00040 #include "nsHTMLParts.h"
00041 #include "nsHTMLAtoms.h"
00042 #include "nsIPresShell.h"
00043 #include "nsPresContext.h"
00044 
00045 nsLeafFrame::~nsLeafFrame()
00046 {
00047 }
00048 
00049 NS_IMETHODIMP
00050 nsLeafFrame::Paint(nsPresContext*      aPresContext,
00051                    nsIRenderingContext& aRenderingContext,
00052                    const nsRect&        aDirtyRect,
00053                    nsFramePaintLayer    aWhichLayer,
00054                    PRUint32             aFlags)
00055 {
00056   if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
00057     PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
00058   }
00059   DO_GLOBAL_REFLOW_COUNT_DSP("nsLeafFrame", &aRenderingContext);
00060   return NS_OK;
00061 }
00062 
00063 NS_IMETHODIMP
00064 nsLeafFrame::Reflow(nsPresContext* aPresContext,
00065                     nsHTMLReflowMetrics& aMetrics,
00066                     const nsHTMLReflowState& aReflowState,
00067                     nsReflowStatus& aStatus)
00068 {
00069   DO_GLOBAL_REFLOW_COUNT("nsLeafFrame", aReflowState.reason);
00070   NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
00071                  ("enter nsLeafFrame::Reflow: aMaxSize=%d,%d",
00072                   aReflowState.availableWidth, aReflowState.availableHeight));
00073 
00074   NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
00075 
00076   // XXX add in code to check for width/height being set via css
00077   // and if set use them instead of calling GetDesiredSize.
00078 
00079 
00080   GetDesiredSize(aPresContext, aReflowState, aMetrics);
00081   nsMargin borderPadding;
00082   AddBordersAndPadding(aPresContext, aReflowState, aMetrics, borderPadding);
00083   if (aMetrics.mComputeMEW) {
00084     aMetrics.SetMEWToActualWidth(aReflowState.mStylePosition->mWidth.GetUnit());
00085   }
00086   aStatus = NS_FRAME_COMPLETE;
00087 
00088   NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
00089                  ("exit nsLeafFrame::Reflow: size=%d,%d",
00090                   aMetrics.width, aMetrics.height));
00091   NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
00092   return NS_OK;
00093 }
00094 
00095 // XXX how should border&padding effect baseline alignment?
00096 // => descent = borderPadding.bottom for example
00097 void
00098 nsLeafFrame::AddBordersAndPadding(nsPresContext* aPresContext,
00099                                   const nsHTMLReflowState& aReflowState,
00100                                   nsHTMLReflowMetrics& aMetrics,
00101                                   nsMargin& aBorderPadding)
00102 {
00103   aBorderPadding = aReflowState.mComputedBorderPadding;
00104   aMetrics.width += aBorderPadding.left + aBorderPadding.right;
00105   aMetrics.height += aBorderPadding.top + aBorderPadding.bottom;
00106   aMetrics.ascent = aMetrics.height;
00107   aMetrics.descent = 0;
00108 }