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[NOT PART OF THE DEFAULT BUILD] Compute the actual bounding metrics of the minus sign ('-') to get a more acurate math axis

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git-svn-id: svn://10.0.0.236/trunk@66168 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
rbs%maths.uq.edu.au
2000-04-17 04:23:03 +00:00
parent 8f93137259
commit 00a24552f9
9 changed files with 123 additions and 56 deletions
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41
mozilla/layout/mathml/base/src/nsMathMLmrootFrame.cpp
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@@ -45,11 +45,14 @@
// <msqrt> and <mroot> -- form a radical - implementation
//
//TODO:
// The code assumes that TeX fonts are picked! Another separate version of
// Reflow() is needed as a fall-back for cases where TeX fonts (CMSY/CMEX)
// are not installed on the system, e.g., the fall-back could explicitly
// draw the branches of the radical using th default rule thickness.
//NOTE:
// The code assumes that TeX fonts are picked.
// There is not fall-back to draw the branches of the sqrt explicitly
// in the case where TeX fonts are not there. In general, there is not
// fall-back(s) in MathML when some (freely-downloadable) fonts are missing.
// Otherwise, this will add much work and unnecessary complexity to the core
// MathML engine. Assuming that authors have the free fonts is part of the
// deal. We are not responsible for cases of misconfigurations out there.
// additional style context to be used by our MathMLChar.
#define NS_SQR_CHAR_STYLE_CONTEXT_INDEX 0
@@ -109,20 +112,26 @@ nsMathMLmrootFrame::Paint(nsIPresContext* aPresContext,
{
nsresult rv = NS_OK;
/////////////
// paint the content we are square-rooting
rv = nsMathMLContainerFrame::Paint(aPresContext, aRenderingContext,
aDirtyRect, aWhichLayer);
/////////////
// paint the sqrt symbol
if ((NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) &&
!NS_MATHML_HAS_ERROR(mPresentationData.flags))
if (!NS_MATHML_HAS_ERROR(mPresentationData.flags))
{
mSqrChar.Paint(aPresContext, aRenderingContext,
aDirtyRect, aWhichLayer, this);
// paint the overline bar
nsStyleColor color;
mStyleContext->GetStyle(eStyleStruct_Color, color);
aRenderingContext.SetColor(color.mColor);
aRenderingContext.FillRect(mBarRect.x, mBarRect.y,
mBarRect.width, mBarRect.height);
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer)
{
// paint the overline bar
nsStyleColor color;
mStyleContext->GetStyle(eStyleStruct_Color, color);
aRenderingContext.SetColor(color.mColor);
aRenderingContext.FillRect(mBarRect.x, mBarRect.y,
mBarRect.width, mBarRect.height);
}
#if defined(NS_DEBUG) && defined(SHOW_BOUNDING_BOX)
// for visual debug
@@ -144,10 +153,6 @@ nsMathMLmrootFrame::Paint(nsIPresContext* aPresContext,
#endif
}
/////////////
// paint the content we are square-rooting
rv = nsMathMLContainerFrame::Paint(aPresContext, aRenderingContext,
aDirtyRect, aWhichLayer);
return rv;
}