C++ nsIRenderingContext::SetColor方法代码示例

void
nsPageFrame::PaintPrintPreviewBackground(nsIRenderingContext& aRenderingContext,
                                         nsPoint aPt)
{
  // fill page with White
  aRenderingContext.SetColor(NS_RGB(255,255,255));
  // REVIEW: this used to have rect's width and height be the
  // mClipRect if specialClipIsSet ... but that seems completely bogus
  // and inconsistent with the painting of the shadow below
  nsRect rect(aPt, GetSize());
  rect.width  -= mPD->mShadowSize.width;
  rect.height -= mPD->mShadowSize.height;
  aRenderingContext.FillRect(rect);
  // draw line around outside of page
  aRenderingContext.SetColor(NS_RGB(0,0,0));
  aRenderingContext.DrawRect(rect);

  if (mPD->mShadowSize.width > 0 && mPD->mShadowSize.height > 0) {
    aRenderingContext.SetColor(NS_RGB(51,51,51));
    nsRect r(aPt.x,aPt.y, mRect.width, mRect.height);
    nsRect shadowRect;
    shadowRect.x = r.x + r.width - mPD->mShadowSize.width;
    shadowRect.y = r.y + mPD->mShadowSize.height;
    shadowRect.width  = mPD->mShadowSize.width;
    shadowRect.height = r.height - mPD->mShadowSize.height;
    aRenderingContext.FillRect(shadowRect);

    shadowRect.x = r.x + mPD->mShadowSize.width;
    shadowRect.y = r.y + r.height - mPD->mShadowSize.height;
    shadowRect.width  = r.width - mPD->mShadowSize.width;
    shadowRect.height = mPD->mShadowSize.height;
    aRenderingContext.FillRect(shadowRect);
  }
}

NS_IMETHODIMP
nsMathMLmsqrtFrame::Paint(nsPresContext*      aPresContext,
                          nsIRenderingContext& aRenderingContext,
                          const nsRect&        aDirtyRect,
                          nsFramePaintLayer    aWhichLayer,
                          PRUint32             aFlags)
{
  /////////////
  // paint the content we are square-rooting
  nsresult rv = nsMathMLContainerFrame::Paint(aPresContext, aRenderingContext, 
                                              aDirtyRect, aWhichLayer);
  /////////////
  // paint the sqrt symbol
  if (!NS_MATHML_HAS_ERROR(mPresentationData.flags)) {
    mSqrChar.Paint(aPresContext, aRenderingContext,
                   aDirtyRect, aWhichLayer, this);

    if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer &&
        mStyleContext->GetStyleVisibility()->IsVisible() &&
        !mBarRect.IsEmpty()) {
      // paint the overline bar
      const nsStyleColor* color = GetStyleColor();
      aRenderingContext.SetColor(color->mColor);
      aRenderingContext.FillRect(mBarRect);
    }

#if defined(NS_DEBUG) && defined(SHOW_BOUNDING_BOX)
    // for visual debug
    if (NS_MATHML_PAINT_BOUNDING_METRICS(mPresentationData.flags)) {
      nsRect rect;
      mSqrChar.GetRect(rect);

      nsBoundingMetrics bm;
      mSqrChar.GetBoundingMetrics(bm);

      aRenderingContext.SetColor(NS_RGB(255,0,0));
      nscoord x = rect.x + bm.leftBearing;
      nscoord y = rect.y;
      nscoord w = bm.rightBearing - bm.leftBearing;
      nscoord h = bm.ascent + bm.descent;
      aRenderingContext.DrawRect(x,y,w,h);
    }
#endif
  }

  return rv;
}

nsresult
nsTableCellFrame::DecorateForSelection(nsPresContext* aPresContext,
                                       nsIRenderingContext& aRenderingContext,
                                       const nsStyleBackground *aStyleColor)
{
  PRInt16 displaySelection;
  displaySelection = DisplaySelection(aPresContext);
  if (displaySelection) {
    PRBool isSelected =
      (GetStateBits() & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
    if (isSelected) {
      nsIFrameSelection *frameSelection =
        aPresContext->PresShell()->FrameSelection();

      PRBool tableCellSelectionMode;
      nsresult result =
        frameSelection->GetTableCellSelection(&tableCellSelectionMode);
      if (NS_SUCCEEDED(result) && tableCellSelectionMode) {
        nscolor       bordercolor;
        if (displaySelection == nsISelectionController::SELECTION_DISABLED) {
          bordercolor = NS_RGB(176,176,176);// disabled color
        }
        else {
          aPresContext->LookAndFeel()->
            GetColor(nsILookAndFeel::eColor_TextSelectBackground,
                     bordercolor);
        }
        PRInt16 t2p = (PRInt16) aPresContext->PixelsToTwips();
        if ((mRect.width >(3*t2p)) && (mRect.height > (3*t2p)))
        {
          //compare bordercolor to ((nsStyleColor *)myColor)->mBackgroundColor)
          bordercolor = EnsureDifferentColors(bordercolor, aStyleColor->mBackgroundColor);
          //outerrounded
          aRenderingContext.SetColor(bordercolor);
          aRenderingContext.DrawLine(t2p, 0, mRect.width, 0);
          aRenderingContext.DrawLine(0, t2p, 0, mRect.height);
          aRenderingContext.DrawLine(t2p, mRect.height, mRect.width, mRect.height);
          aRenderingContext.DrawLine(mRect.width, t2p, mRect.width, mRect.height);
          //middle
          aRenderingContext.DrawRect(t2p, t2p, mRect.width-t2p, mRect.height-t2p);
          //shading
          aRenderingContext.DrawLine(2*t2p, mRect.height-2*t2p, mRect.width-t2p, mRect.height- (2*t2p));
          aRenderingContext.DrawLine(mRect.width - (2*t2p), 2*t2p, mRect.width - (2*t2p), mRect.height-t2p);
        }
      }
    }
  }
  return NS_OK;
}

//------------------------------------------------------------
void
nsGfxCheckboxControlFrame::PaintCheckBox(nsIRenderingContext& aRenderingContext,
                                         nsPoint aPt,
                                         const nsRect& aDirtyRect)
{
  // REVIEW: moved the mAppearance test out so we avoid constructing
  // a display item if it's not needed
  nsRect checkRect(aPt, mRect.Size());
  checkRect.Deflate(GetUsedBorderAndPadding());

  const nsStyleColor* color = GetStyleColor();
  aRenderingContext.SetColor(color->mColor);

  PaintCheckMark(aRenderingContext, checkRect);
}

/*virtual*/ void
nsHTMLContainerFrame::PaintTextDecorationLines(
                   nsIRenderingContext& aRenderingContext, 
                   nscolor aColor, 
                   nscoord aOffset, 
                   nscoord aAscent, 
                   nscoord aSize) 
{
  nsMargin bp;
  CalcBorderPadding(bp);
  PRIntn skip = GetSkipSides();
  NS_FOR_CSS_SIDES(side) {
    if (skip & (1 << side)) {
      bp.side(side) = 0;
    }
  }
  aRenderingContext.SetColor(aColor);
  nscoord innerWidth = mRect.width - bp.left - bp.right;
  aRenderingContext.FillRect(bp.left, 
                             bp.top + aAscent - aOffset, innerWidth, aSize);
}

NS_IMETHODIMP
nsPlaceholderFrame::Paint(nsPresContext*      aPresContext,
                          nsIRenderingContext& aRenderingContext,
                          const nsRect&        aDirtyRect,
                          nsFramePaintLayer    aWhichLayer,
                          PRUint32             aFlags)
{
  if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
    float p2t;
    p2t = aPresContext->PixelsToTwips();
    aRenderingContext.SetColor(NS_RGB(0, 255, 255));
    nscoord x = NSIntPixelsToTwips(-5, p2t);
    aRenderingContext.FillRect(x, 0, NSIntPixelsToTwips(13, p2t),
                               NSIntPixelsToTwips(3, p2t));
    nscoord y = NSIntPixelsToTwips(-10, p2t);
    aRenderingContext.FillRect(0, y, NSIntPixelsToTwips(3, p2t),
                               NSIntPixelsToTwips(10, p2t));
  }
  DO_GLOBAL_REFLOW_COUNT_DSP("nsPlaceholderFrame", &aRenderingContext);
  return NS_OK;
}

void nsComboboxControlFrame::PaintFocus(nsIRenderingContext& aRenderingContext,
                                        nsPoint aPt)
{
  /* Do we need to do anything? */
  if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::disabled) ||
      mFocused != this)
    return;

  aRenderingContext.PushState();
  nsRect clipRect = mDisplayFrame->GetRect() + aPt;
  aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);

  // REVIEW: Why does the old code paint mDisplayFrame again? We've
  // already painted it in the children above. So clipping it here won't do
  // us much good.

  /////////////////////
  // draw focus

  aRenderingContext.SetLineStyle(nsLineStyle_kDotted);
  aRenderingContext.SetColor(GetStyleColor()->mColor);

  //aRenderingContext.DrawRect(clipRect);

  nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
  clipRect.width -= onePixel;
  clipRect.height -= onePixel;
  aRenderingContext.DrawLine(clipRect.x, clipRect.y, 
                             clipRect.x+clipRect.width, clipRect.y);
  aRenderingContext.DrawLine(clipRect.x+clipRect.width, clipRect.y, 
                             clipRect.x+clipRect.width, clipRect.y+clipRect.height);
  aRenderingContext.DrawLine(clipRect.x+clipRect.width, clipRect.y+clipRect.height, 
                             clipRect.x, clipRect.y+clipRect.height);
  aRenderingContext.DrawLine(clipRect.x, clipRect.y+clipRect.height, 
                             clipRect.x, clipRect.y);
  aRenderingContext.DrawLine(clipRect.x, clipRect.y+clipRect.height, 
                             clipRect.x, clipRect.y);

  aRenderingContext.PopState();
}

NS_IMETHODIMP
nsTableCellFrame::Paint(nsPresContext*      aPresContext,
                        nsIRenderingContext& aRenderingContext,
                        const nsRect&        aDirtyRect,
                        nsFramePaintLayer    aWhichLayer,
                        PRUint32             aFlags)
{
  NS_ENSURE_TRUE(aPresContext, NS_ERROR_NULL_POINTER);
  PRBool isVisible;
  if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_FALSE, &isVisible)) && !isVisible) {
    return NS_OK;
  }

  PRBool paintChildren = PR_TRUE;

  if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
    const nsStyleBorder*      myBorder       = nsnull;
    const nsStylePadding*     myPadding      = nsnull;
    const nsStyleTableBorder* cellTableStyle = nsnull;
    const nsStyleVisibility* vis = GetStyleVisibility();
    if (vis->IsVisible()) {
      myBorder = GetStyleBorder();
      myPadding = GetStylePadding();
      cellTableStyle = GetStyleTableBorder();

      // draw the border & background only when there is content or showing empty cells
      if (NS_STYLE_TABLE_EMPTY_CELLS_HIDE != cellTableStyle->mEmptyCells ||
          !GetContentEmpty()) {
        PaintUnderlay(*aPresContext, aRenderingContext, aDirtyRect, aFlags,
                      *myBorder, *myPadding, *cellTableStyle);
      }

      // Paint outline
      nsRect rect(0, 0, mRect.width, mRect.height);
      const nsStyleOutline* myOutline = GetStyleOutline();
      nsCSSRendering::PaintOutline(aPresContext, aRenderingContext, this,
                                  aDirtyRect, rect, *myBorder, *myOutline,
                                  mStyleContext, 0);

      const nsStyleBackground* myColor = GetStyleBackground();
      DecorateForSelection(aPresContext, aRenderingContext,myColor); //ignore return value
    }

    paintChildren = !(aFlags & NS_PAINT_FLAG_TABLE_CELL_BG_PASS);
    //flags were for us; remove them for our children
    aFlags &= ~ (NS_PAINT_FLAG_TABLE_CELL_BG_PASS | NS_PAINT_FLAG_TABLE_BG_PAINT);
  }

#ifdef DEBUG
  // for debug...
  if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
    aRenderingContext.SetColor(NS_RGB(0, 0, 128));
    aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
  }
#endif

  // paint the children unless we've been told not to
  if (paintChildren) {
    const nsStyleDisplay* disp = GetStyleDisplay();
    // if the cell originates in a row and/or col that is collapsed, the
    // bottom and/or right portion of the cell is painted by translating
    // the rendering context.
    nsPoint offset;
    GetCollapseOffset(offset);
    PRBool pushed = PR_FALSE;
    if ((0 != offset.x) || (0 != offset.y)) {
      aRenderingContext.PushState();
      pushed = PR_TRUE;
      aRenderingContext.Translate(offset.x, offset.y);
      aRenderingContext.SetClipRect(nsRect(-offset.x, -offset.y, mRect.width, mRect.height),
                                    nsClipCombine_kIntersect);
    }
    else {
      // XXXldb HIDDEN should really create a scrollframe,
      // but use |IsTableClip| here since it doesn't.
      if (disp->IsTableClip() ||
          (HasPctOverHeight() && eCompatibility_NavQuirks == aPresContext->CompatibilityMode())) {
        aRenderingContext.PushState();
        pushed = PR_TRUE;
        SetOverflowClipRect(aRenderingContext);
      }    
    }

    PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer, aFlags);

    if (pushed) {
      aRenderingContext.PopState();
    }
  } 
  
  DO_GLOBAL_REFLOW_COUNT_DSP_J("nsTableCellFrame", &aRenderingContext, 0);
  return NS_OK;
  /*nsFrame::Paint(aPresContext,
                        aRenderingContext,
                        aDirtyRect,
                        aWhichLayer);*/
}

// Draw a header or footer string
// @param aRenderingContext - rendering context to draw into
// @param aHeaderFooter - indicates whether it is a header or footer
// @param aJust - indicates where the string is located within the header/footer
// @param aStr - the string to be drawn
// @param aRect - the rect of the page
// @param aHeight - the height of the font
// @param aAscent - the ascent of the font
// @param aWidth - available width for the string
void
nsPageFrame::DrawHeaderFooter(nsIRenderingContext& aRenderingContext,
                              nsHeaderFooterEnum   aHeaderFooter,
                              PRInt32              aJust,
                              const nsString&      aStr,
                              const nsRect&        aRect,
                              nscoord              aAscent,
                              nscoord              aHeight,
                              nscoord              aWidth)
{

  nscoord contentWidth = aWidth - (mPD->mEdgePaperMargin.left + mPD->mEdgePaperMargin.right);

  if ((aHeaderFooter == eHeader && aHeight < mPD->mReflowMargin.top) ||
      (aHeaderFooter == eFooter && aHeight < mPD->mReflowMargin.bottom)) {
    nsAutoString str;
    ProcessSpecialCodes(aStr, str);

    PRInt32 indx;
    PRInt32 textWidth = 0;
    const PRUnichar* text = str.get();

    PRInt32 len = (PRInt32)str.Length();
    if (len == 0) {
      return; // bail is empty string
    }
    // find how much text fits, the "position" is the size of the available area
    if (nsLayoutUtils::BinarySearchForPosition(&aRenderingContext, text, 0, 0, 0, len,
                                PRInt32(contentWidth), indx, textWidth)) {
      if (indx < len-1 ) {
        // we can't fit in all the text
        if (indx > 3) {
          // But we can fit in at least 4 chars.  Show all but 3 of them, then
          // an ellipsis.
          // XXXbz for non-plane0 text, this may be cutting things in the
          // middle of a codepoint!  Also, we have no guarantees that the three
          // dots will fit in the space the three chars we removed took up with
          // these font metrics!
          str.Truncate(indx-3);
          str.AppendLiteral("...");
        } else {
          // We can only fit 3 or fewer chars.  Just show nothing
          str.Truncate();
        }
      }
    } else { 
      return; // bail if couldn't find the correct length
    }
    
    if (HasRTLChars(str)) {
      PresContext()->SetBidiEnabled();
    }

    // cacl the x and y positions of the text
    nscoord x = GetXPosition(aRenderingContext, aRect, aJust, str);
    nscoord y;
    if (aHeaderFooter == eHeader) {
      y = aRect.y + mPD->mExtraMargin.top + mPD->mEdgePaperMargin.top;
    } else {
      y = aRect.YMost() - aHeight - mPD->mExtraMargin.bottom - mPD->mEdgePaperMargin.bottom;
    }

    // set up new clip and draw the text
    aRenderingContext.PushState();
    aRenderingContext.SetColor(NS_RGB(0,0,0));
    aRenderingContext.SetClipRect(aRect, nsClipCombine_kIntersect);
    nsLayoutUtils::DrawString(this, &aRenderingContext, str.get(), str.Length(), nsPoint(x, y + aAscent));
    aRenderingContext.PopState();
  }
}

void
nsTextBoxFrame::DrawText(nsIRenderingContext& aRenderingContext,
                         const nsRect&        aTextRect,
                         const nscolor*       aOverrideColor)
{
    nsPresContext* presContext = PresContext();

    // paint the title
    nscolor overColor;
    nscolor underColor;
    nscolor strikeColor;
    nsStyleContext* context = mStyleContext;
  
    PRUint8 decorations = NS_STYLE_TEXT_DECORATION_NONE; // Begin with no decorations
    PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_UNDERLINE | NS_STYLE_TEXT_DECORATION_OVERLINE |
                        NS_STYLE_TEXT_DECORATION_LINE_THROUGH; // A mask of all possible decorations.
    PRBool hasDecorations = context->HasTextDecorations();

    do {  // find decoration colors
      const nsStyleTextReset* styleText = context->GetStyleTextReset();
      
      if (decorMask & styleText->mTextDecoration) {  // a decoration defined here
        nscolor color = aOverrideColor ? *aOverrideColor : context->GetStyleColor()->mColor;
    
        if (NS_STYLE_TEXT_DECORATION_UNDERLINE & decorMask & styleText->mTextDecoration) {
          underColor = color;
          decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
          decorations |= NS_STYLE_TEXT_DECORATION_UNDERLINE;
        }
        if (NS_STYLE_TEXT_DECORATION_OVERLINE & decorMask & styleText->mTextDecoration) {
          overColor = color;
          decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
          decorations |= NS_STYLE_TEXT_DECORATION_OVERLINE;
        }
        if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & decorMask & styleText->mTextDecoration) {
          strikeColor = color;
          decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
          decorations |= NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
        }
      }
      if (0 != decorMask) {
        context = context->GetParent();
        if (context) {
          hasDecorations = context->HasTextDecorations();
        }
      }
    } while (context && hasDecorations && (0 != decorMask));

    nsCOMPtr<nsIFontMetrics> fontMet;
    nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fontMet));

    nscoord offset;
    nscoord size;
    nscoord ascent;
    fontMet->GetMaxAscent(ascent);

    nscoord baseline =
      presContext->RoundAppUnitsToNearestDevPixels(aTextRect.y + ascent);
    nsRefPtr<gfxContext> ctx = aRenderingContext.ThebesContext();
    gfxPoint pt(presContext->AppUnitsToGfxUnits(aTextRect.x),
                presContext->AppUnitsToGfxUnits(aTextRect.y));
    gfxFloat width = presContext->AppUnitsToGfxUnits(aTextRect.width);
    gfxFloat ascentPixel = presContext->AppUnitsToGfxUnits(ascent);

    // Underlines are drawn before overlines, and both before the text
    // itself, per http://www.w3.org/TR/CSS21/zindex.html point 7.2.1.4.1.1.
    // (We don't apply this rule to the access-key underline because we only
    // find out where that is as a side effect of drawing the text, in the
    // general case -- see below.)
    if (decorations & (NS_FONT_DECORATION_OVERLINE |
                       NS_FONT_DECORATION_UNDERLINE)) {
      fontMet->GetUnderline(offset, size);
      gfxFloat offsetPixel = presContext->AppUnitsToGfxUnits(offset);
      gfxFloat sizePixel = presContext->AppUnitsToGfxUnits(size);
      if (decorations & NS_FONT_DECORATION_UNDERLINE) {
        nsCSSRendering::PaintDecorationLine(ctx, underColor,
                          pt, gfxSize(width, sizePixel),
                          ascentPixel, offsetPixel,
                          NS_STYLE_TEXT_DECORATION_UNDERLINE,
                          nsCSSRendering::DECORATION_STYLE_SOLID);
      }
      if (decorations & NS_FONT_DECORATION_OVERLINE) {
        nsCSSRendering::PaintDecorationLine(ctx, overColor,
                          pt, gfxSize(width, sizePixel),
                          ascentPixel, ascentPixel,
                          NS_STYLE_TEXT_DECORATION_OVERLINE,
                          nsCSSRendering::DECORATION_STYLE_SOLID);
      }
    }

    aRenderingContext.SetFont(fontMet);

    CalculateUnderline(aRenderingContext);

    aRenderingContext.SetColor(aOverrideColor ? *aOverrideColor : GetStyleColor()->mColor);

#ifdef IBMBIDI
    nsresult rv = NS_ERROR_FAILURE;

    if (mState & NS_FRAME_IS_BIDI) {
//.........这里部分代码省略.........

// this is identical to nsHTMLContainerFrame::Paint except for the background and border. 
NS_IMETHODIMP
nsFieldSetFrame::Paint(nsPresContext*       aPresContext,
                       nsIRenderingContext& aRenderingContext,
                       const nsRect&        aDirtyRect,
                       nsFramePaintLayer    aWhichLayer,
                       PRUint32             aFlags)
{
  if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
    // Paint our background and border
    PRBool isVisible;
    if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && 
                     isVisible && mRect.width && mRect.height) {
      PRIntn skipSides = GetSkipSides();
      const nsStyleBorder* borderStyle = GetStyleBorder();
      const nsStylePadding* paddingStyle = GetStylePadding();
       
      nscoord topBorder = borderStyle->GetBorderWidth(NS_SIDE_TOP);

      nscoord yoff = 0;
      
      // if the border is smaller than the legend. Move the border down
      // to be centered on the legend. 
      if (topBorder < mLegendRect.height)
        yoff = (mLegendRect.height - topBorder)/2;
      
      nsRect rect(0, yoff, mRect.width, mRect.height - yoff);

      nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
                                      aDirtyRect, rect, *borderStyle,
                                      *paddingStyle, PR_TRUE);

      if (mLegendFrame) {

        // Use the rect of the legend frame, not mLegendRect, so we draw our
        // border under the legend's left and right margins.
        const nsRect & legendRect = mLegendFrame->GetRect();
      
        // we should probably use PaintBorderEdges to do this but for now just use clipping
        // to achieve the same effect.

        // draw left side
        nsRect clipRect(rect);
        clipRect.width = legendRect.x - rect.x;
        clipRect.height = topBorder;

        aRenderingContext.PushState();
        aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
        nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
                                    aDirtyRect, rect, *borderStyle, mStyleContext, skipSides);
  
        aRenderingContext.PopState();


        // draw right side
        clipRect = rect;
        clipRect.x = legendRect.x + legendRect.width;
        clipRect.width -= (legendRect.x + legendRect.width);
        clipRect.height = topBorder;

        aRenderingContext.PushState();
        aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
        nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
                                    aDirtyRect, rect, *borderStyle, mStyleContext, skipSides);
  
        aRenderingContext.PopState();

      
        // draw bottom
        clipRect = rect;
        clipRect.y += topBorder;
        clipRect.height = mRect.height - (yoff + topBorder);
      
        aRenderingContext.PushState();
        aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
        nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
                                    aDirtyRect, rect, *borderStyle, mStyleContext, skipSides);
  
        aRenderingContext.PopState();
      } else {

        nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
                                    aDirtyRect,
                                    nsRect(0,0,mRect.width, mRect.height),
                                    *borderStyle, mStyleContext, skipSides);
      }
    }
  }

  PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);

#ifdef DEBUG
  if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
    if (HasView()) {
      aRenderingContext.SetColor(NS_RGB(0,0,255));
    }
    else {
      aRenderingContext.SetColor(NS_RGB(255,0,0));
    }
    aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
//.........这里部分代码省略.........