Ejemplo n.º 1
0
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;
}
Ejemplo n.º 3
0
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;
}
Ejemplo n.º 4
0
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;
}
Ejemplo n.º 6
0
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;
}
Ejemplo n.º 9
0
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;
}