NS_IMETHODIMP
nsMathMLmfracFrame::TransmitAutomaticData()
{
// 1. The REC says:
// The <mfrac> element sets displaystyle to "false", or if it was already
// false increments scriptlevel by 1, within numerator and denominator.
// 2. The TeXbook (Ch 17. p.141) says the numerator inherits the compression
// while the denominator is compressed
bool increment = !NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags);
SetIncrementScriptLevel(0, increment);
SetIncrementScriptLevel(1, increment);
UpdatePresentationDataFromChildAt(0, -1,
~NS_MATHML_DISPLAYSTYLE,
NS_MATHML_DISPLAYSTYLE);
UpdatePresentationDataFromChildAt(1, 1,
NS_MATHML_COMPRESSED,
NS_MATHML_COMPRESSED);
// if our numerator is an embellished operator, let its state bubble to us
GetEmbellishDataFrom(mFrames.FirstChild(), mEmbellishData);
if (NS_MATHML_IS_EMBELLISH_OPERATOR(mEmbellishData.flags)) {
// even when embellished, we need to record that <mfrac> won't fire
// Stretch() on its embellished child
mEmbellishData.direction = NS_STRETCH_DIRECTION_UNSUPPORTED;
}
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmrootFrame::TransmitAutomaticData()
{
// 1. The REC says:
// The <mroot> element increments scriptlevel by 2, and sets displaystyle to
// "false", within index, but leaves both attributes unchanged within base.
// 2. The TeXbook (Ch 17. p.141) says \sqrt is compressed
UpdatePresentationDataFromChildAt(1, 1,
~NS_MATHML_DISPLAYSTYLE | NS_MATHML_COMPRESSED,
NS_MATHML_DISPLAYSTYLE | NS_MATHML_COMPRESSED);
UpdatePresentationDataFromChildAt(0, 0,
NS_MATHML_COMPRESSED, NS_MATHML_COMPRESSED);
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmfracFrame::TransmitAutomaticData()
{
// The TeXbook (Ch 17. p.141) says the numerator inherits the compression
// while the denominator is compressed
UpdatePresentationDataFromChildAt(1, 1,
NS_MATHML_COMPRESSED,
NS_MATHML_COMPRESSED);
// If displaystyle is false, then scriptlevel is incremented, so notify the
// children of this.
if (!StyleFont()->mMathDisplay) {
PropagateFrameFlagFor(mFrames.FirstChild(),
NS_FRAME_MATHML_SCRIPT_DESCENDANT);
PropagateFrameFlagFor(mFrames.LastChild(),
NS_FRAME_MATHML_SCRIPT_DESCENDANT);
}
// if our numerator is an embellished operator, let its state bubble to us
GetEmbellishDataFrom(mFrames.FirstChild(), mEmbellishData);
if (NS_MATHML_IS_EMBELLISH_OPERATOR(mEmbellishData.flags)) {
// even when embellished, we need to record that <mfrac> won't fire
// Stretch() on its embellished child
mEmbellishData.direction = NS_STRETCH_DIRECTION_UNSUPPORTED;
}
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmrootFrame::TransmitAutomaticData()
{
// 1. The REC says:
// The <mroot> element increments scriptlevel by 2, and sets displaystyle to
// "false", within index, but leaves both attributes unchanged within base.
// 2. The TeXbook (Ch 17. p.141) says \sqrt is compressed
UpdatePresentationDataFromChildAt(1, 1,
NS_MATHML_COMPRESSED,
NS_MATHML_COMPRESSED);
UpdatePresentationDataFromChildAt(0, 0,
NS_MATHML_COMPRESSED, NS_MATHML_COMPRESSED);
PropagateFrameFlagFor(mFrames.LastChild(),
NS_FRAME_MATHML_SCRIPT_DESCENDANT);
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmencloseFrame::TransmitAutomaticData()
{
if (IsToDraw(NOTATION_RADICAL)) {
// The TeXBook (Ch 17. p.141) says that \sqrt is cramped
UpdatePresentationDataFromChildAt(0, -1,
NS_MATHML_COMPRESSED,
NS_MATHML_COMPRESSED);
}
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmsqrtFrame::TransmitAutomaticData()
{
// 1. The REC says:
// The <msqrt> element leaves both attributes [displaystyle and scriptlevel]
// unchanged within all its arguments.
// 2. The TeXBook (Ch 17. p.141) says that \sqrt is cramped
UpdatePresentationDataFromChildAt(0, -1, 0,
NS_MATHML_COMPRESSED,
NS_MATHML_COMPRESSED);
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmsubsupFrame::TransmitAutomaticData()
{
// if our base is an embellished operator, let its state bubble to us
mPresentationData.baseFrame = mFrames.FirstChild();
GetEmbellishDataFrom(mPresentationData.baseFrame, mEmbellishData);
// 1. The REC says:
// The <msubsup> element increments scriptlevel by 1, and sets displaystyle to
// "false", within subscript and superscript, but leaves both attributes
// unchanged within base.
// 2. The TeXbook (Ch 17. p.141) says the superscript inherits the compression
// while the subscript is compressed
UpdatePresentationDataFromChildAt(1, -1,
~NS_MATHML_DISPLAYSTYLE,
NS_MATHML_DISPLAYSTYLE);
UpdatePresentationDataFromChildAt(1, 1,
NS_MATHML_COMPRESSED,
NS_MATHML_COMPRESSED);
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmmultiscriptsFrame::TransmitAutomaticData()
{
// if our base is an embellished operator, let its state bubble to us
mPresentationData.baseFrame = mFrames.FirstChild();
GetEmbellishDataFrom(mPresentationData.baseFrame, mEmbellishData);
// The REC says:
// The <mmultiscripts> element increments scriptlevel by 1, and sets
// displaystyle to "false", within each of its arguments except base
UpdatePresentationDataFromChildAt(1, -1,
~NS_MATHML_DISPLAYSTYLE, NS_MATHML_DISPLAYSTYLE);
// The TeXbook (Ch 17. p.141) says the superscript inherits the compression
// while the subscript is compressed. So here we collect subscripts and set
// the compression flag in them.
PRInt32 count = 0;
bool isSubScript = false;
nsAutoTArray<nsIFrame*, 8> subScriptFrames;
nsIFrame* childFrame = mFrames.FirstChild();
while (childFrame) {
if (childFrame->GetContent()->Tag() == nsGkAtoms::mprescripts_) {
// mprescripts frame
}
else if (0 == count) {
// base frame
}
else {
// super/subscript block
if (isSubScript) {
// subscript
subScriptFrames.AppendElement(childFrame);
}
else {
// superscript
}
isSubScript = !isSubScript;
}
count++;
childFrame = childFrame->GetNextSibling();
}
for (PRInt32 i = subScriptFrames.Length() - 1; i >= 0; i--) {
childFrame = subScriptFrames[i];
PropagatePresentationDataFor(childFrame,
NS_MATHML_COMPRESSED, NS_MATHML_COMPRESSED);
}
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmsupFrame::TransmitAutomaticData()
{
// if our base is an embellished operator, its flags bubble to us
mPresentationData.baseFrame = mFrames.FirstChild();
GetEmbellishDataFrom(mPresentationData.baseFrame, mEmbellishData);
// 1. The REC says:
// The <msup> element increments scriptlevel by 1, and sets displaystyle to
// "false", within superscript, but leaves both attributes unchanged within base.
// 2. The TeXbook (Ch 17. p.141) says the superscript *inherits* the compression,
// so we don't set the compression flag. Our parent will propagate its own.
UpdatePresentationDataFromChildAt(1, -1,
~NS_MATHML_DISPLAYSTYLE,
NS_MATHML_DISPLAYSTYLE);
return NS_OK;
}