/*
* Initialize the list of notations to draw
*/
void nsMathMLmencloseFrame::InitNotations()
{
mNotationsToDraw = 0;
mLongDivCharIndex = mRadicalCharIndex = -1;
mMathMLChar.Clear();
nsAutoString value;
if (GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::notation_,
value)) {
// parse the notation attribute
nsWhitespaceTokenizer tokenizer(value);
while (tokenizer.hasMoreTokens())
AddNotation(tokenizer.nextToken());
if (IsToDraw(NOTATION_UPDIAGONALARROW)) {
// For <menclose notation="updiagonalstrike updiagonalarrow">, if
// the two notations are drawn then the strike line may cause the point of
// the arrow to be too wide. Hence we will only draw the updiagonalarrow
// and the arrow shaft may be thought to be the updiagonalstrike.
mNotationsToDraw &= ~NOTATION_UPDIAGONALSTRIKE;
}
} else {
// default: longdiv
if (NS_FAILED(AllocateMathMLChar(NOTATION_LONGDIV)))
return;
mNotationsToDraw = NOTATION_LONGDIV;
}
}
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;
}
/* virtual */ nsresult
nsMathMLmencloseFrame::PlaceInternal(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize,
bool aWidthOnly)
{
///////////////
// Measure the size of our content using the base class to format like an
// inferred mrow.
nsHTMLReflowMetrics baseSize;
nsresult rv =
nsMathMLContainerFrame::Place(aRenderingContext, false, baseSize);
if (NS_MATHML_HAS_ERROR(mPresentationData.flags) || NS_FAILED(rv)) {
DidReflowChildren(GetFirstPrincipalChild());
return rv;
}
nsBoundingMetrics bmBase = baseSize.mBoundingMetrics;
nscoord dx_left = 0, dx_right = 0;
nsBoundingMetrics bmLongdivChar, bmRadicalChar;
nscoord radicalAscent = 0, radicalDescent = 0;
nscoord longdivAscent = 0, longdivDescent = 0;
nscoord psi = 0;
///////////////
// Thickness of bars and font metrics
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
nscoord mEmHeight;
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aRenderingContext.SetFont(fm);
GetRuleThickness(aRenderingContext, fm, mRuleThickness);
GetEmHeight(fm, mEmHeight);
PRUnichar one = '1';
nsBoundingMetrics bmOne = aRenderingContext.GetBoundingMetrics(&one, 1);
///////////////
// General rules: the menclose element takes the size of the enclosed content.
// We add a padding when needed.
// determine padding & psi
nscoord padding = 3 * mRuleThickness;
nscoord delta = padding % onePixel;
if (delta)
padding += onePixel - delta; // round up
if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
nscoord phi;
// Rule 11, App. G, TeXbook
// psi = clearance between rule and content
if (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags))
phi = fm->XHeight();
else
phi = mRuleThickness;
psi = mRuleThickness + phi / 4;
delta = psi % onePixel;
if (delta)
psi += onePixel - delta; // round up
}
if (mRuleThickness < onePixel)
mRuleThickness = onePixel;
// Set horizontal parameters
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_CIRCLE))
dx_left = padding;
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_CIRCLE))
dx_right = padding;
// Set vertical parameters
if (IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
IsToDraw(NOTATION_VERTICALSTRIKE) ||
IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_RADICAL) ||
IsToDraw(NOTATION_LONGDIV)) {
// set a minimal value for the base height
bmBase.ascent = NS_MAX(bmOne.ascent, bmBase.ascent);
bmBase.descent = NS_MAX(0, bmBase.descent);
}
mBoundingMetrics.ascent = bmBase.ascent;
mBoundingMetrics.descent = bmBase.descent;
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_CIRCLE))
mBoundingMetrics.ascent += padding;
if (IsToDraw(NOTATION_ROUNDEDBOX) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_CIRCLE))
mBoundingMetrics.descent += padding;
///////////////
// circle notation: we don't want the ellipse to overlap the enclosed
// content. Hence, we need to increase the size of the bounding box by a
// factor of at least sqrt(2).
if (IsToDraw(NOTATION_CIRCLE)) {
double ratio = (sqrt(2.0) - 1.0) / 2.0;
nscoord padding2;
// Update horizontal parameters
padding2 = ratio * bmBase.width;
dx_left = NS_MAX(dx_left, padding2);
dx_right = NS_MAX(dx_right, padding2);
// Update vertical parameters
padding2 = ratio * (bmBase.ascent + bmBase.descent);
mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
bmBase.ascent + padding2);
mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
bmBase.descent + padding2);
}
///////////////
// longdiv notation:
if (IsToDraw(NOTATION_LONGDIV)) {
if (aWidthOnly) {
nscoord longdiv_width = mMathMLChar[mLongDivCharIndex].
GetMaxWidth(PresContext(), aRenderingContext);
// Update horizontal parameters
dx_left = NS_MAX(dx_left, longdiv_width);
} else {
// Stretch the parenthesis to the appropriate height if it is not
// big enough.
nsBoundingMetrics contSize = bmBase;
contSize.ascent = mRuleThickness;
contSize.descent = bmBase.ascent + bmBase.descent + psi;
// height(longdiv) should be >= height(base) + psi + mRuleThickness
mMathMLChar[mLongDivCharIndex].Stretch(PresContext(), aRenderingContext,
NS_STRETCH_DIRECTION_VERTICAL,
contSize, bmLongdivChar,
NS_STRETCH_LARGER, false);
mMathMLChar[mLongDivCharIndex].GetBoundingMetrics(bmLongdivChar);
// Update horizontal parameters
dx_left = NS_MAX(dx_left, bmLongdivChar.width);
// Update vertical parameters
longdivAscent = bmBase.ascent + psi + mRuleThickness;
longdivDescent = NS_MAX(bmBase.descent,
(bmLongdivChar.ascent + bmLongdivChar.descent -
longdivAscent));
mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
longdivAscent);
mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
longdivDescent);
}
}
///////////////
// radical notation:
if (IsToDraw(NOTATION_RADICAL)) {
nscoord *dx_leading =
NS_MATHML_IS_RTL(mPresentationData.flags) ? &dx_right : &dx_left;
if (aWidthOnly) {
nscoord radical_width = mMathMLChar[mRadicalCharIndex].
GetMaxWidth(PresContext(), aRenderingContext);
// Update horizontal parameters
*dx_leading = NS_MAX(*dx_leading, radical_width);
} else {
// Stretch the radical symbol to the appropriate height if it is not
// big enough.
nsBoundingMetrics contSize = bmBase;
contSize.ascent = mRuleThickness;
contSize.descent = bmBase.ascent + bmBase.descent + psi;
// height(radical) should be >= height(base) + psi + mRuleThickness
mMathMLChar[mRadicalCharIndex].Stretch(PresContext(), aRenderingContext,
NS_STRETCH_DIRECTION_VERTICAL,
contSize, bmRadicalChar,
NS_STRETCH_LARGER,
NS_MATHML_IS_RTL(mPresentationData.flags));
mMathMLChar[mRadicalCharIndex].GetBoundingMetrics(bmRadicalChar);
// Update horizontal parameters
*dx_leading = NS_MAX(*dx_leading, bmRadicalChar.width);
// Update vertical parameters
radicalAscent = bmBase.ascent + psi + mRuleThickness;
radicalDescent = NS_MAX(bmBase.descent,
(bmRadicalChar.ascent + bmRadicalChar.descent -
radicalAscent));
mBoundingMetrics.ascent = NS_MAX(mBoundingMetrics.ascent,
radicalAscent);
mBoundingMetrics.descent = NS_MAX(mBoundingMetrics.descent,
radicalDescent);
}
}
///////////////
//
if (IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX) ||
(IsToDraw(NOTATION_LEFT) && IsToDraw(NOTATION_RIGHT))) {
// center the menclose around the content (horizontally)
dx_left = dx_right = NS_MAX(dx_left, dx_right);
}
///////////////
// The maximum size is now computed: set the remaining parameters
mBoundingMetrics.width = dx_left + bmBase.width + dx_right;
mBoundingMetrics.leftBearing = NS_MIN(0, dx_left + bmBase.leftBearing);
mBoundingMetrics.rightBearing =
NS_MAX(mBoundingMetrics.width, dx_left + bmBase.rightBearing);
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.ascent = NS_MAX(mBoundingMetrics.ascent, baseSize.ascent);
aDesiredSize.height = aDesiredSize.ascent +
NS_MAX(mBoundingMetrics.descent, baseSize.height - baseSize.ascent);
if (IsToDraw(NOTATION_LONGDIV) || IsToDraw(NOTATION_RADICAL)) {
// get the leading to be left at the top of the resulting frame
// this seems more reliable than using fm->GetLeading() on suspicious
// fonts
nscoord leading = nscoord(0.2f * mEmHeight);
nscoord desiredSizeAscent = aDesiredSize.ascent;
nscoord desiredSizeDescent = aDesiredSize.height - aDesiredSize.ascent;
if (IsToDraw(NOTATION_LONGDIV)) {
desiredSizeAscent = NS_MAX(desiredSizeAscent,
longdivAscent + leading);
desiredSizeDescent = NS_MAX(desiredSizeDescent,
longdivDescent + mRuleThickness);
}
if (IsToDraw(NOTATION_RADICAL)) {
desiredSizeAscent = NS_MAX(desiredSizeAscent,
radicalAscent + leading);
desiredSizeDescent = NS_MAX(desiredSizeDescent,
radicalDescent + mRuleThickness);
}
aDesiredSize.ascent = desiredSizeAscent;
aDesiredSize.height = desiredSizeAscent + desiredSizeDescent;
}
if (IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX) ||
(IsToDraw(NOTATION_TOP) && IsToDraw(NOTATION_BOTTOM))) {
// center the menclose around the content (vertically)
nscoord dy = NS_MAX(aDesiredSize.ascent - bmBase.ascent,
aDesiredSize.height - aDesiredSize.ascent -
bmBase.descent);
aDesiredSize.ascent = bmBase.ascent + dy;
aDesiredSize.height = aDesiredSize.ascent + bmBase.descent + dy;
}
// Update mBoundingMetrics ascent/descent
if (IsToDraw(NOTATION_TOP) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
IsToDraw(NOTATION_VERTICALSTRIKE) ||
IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX))
mBoundingMetrics.ascent = aDesiredSize.ascent;
if (IsToDraw(NOTATION_BOTTOM) ||
IsToDraw(NOTATION_RIGHT) ||
IsToDraw(NOTATION_LEFT) ||
IsToDraw(NOTATION_UPDIAGONALSTRIKE) ||
IsToDraw(NOTATION_DOWNDIAGONALSTRIKE) ||
IsToDraw(NOTATION_VERTICALSTRIKE) ||
IsToDraw(NOTATION_CIRCLE) ||
IsToDraw(NOTATION_ROUNDEDBOX))
mBoundingMetrics.descent = aDesiredSize.height - aDesiredSize.ascent;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
if (aPlaceOrigin) {
//////////////////
// Set position and size of MathMLChars
if (IsToDraw(NOTATION_LONGDIV))
mMathMLChar[mLongDivCharIndex].SetRect(nsRect(dx_left -
bmLongdivChar.width,
aDesiredSize.ascent -
longdivAscent,
bmLongdivChar.width,
bmLongdivChar.ascent +
bmLongdivChar.descent));
if (IsToDraw(NOTATION_RADICAL)) {
nscoord dx = NS_MATHML_IS_RTL(mPresentationData.flags) ?
dx_left + bmBase.width : dx_left - bmRadicalChar.width;
mMathMLChar[mRadicalCharIndex].SetRect(nsRect(dx,
aDesiredSize.ascent -
radicalAscent,
bmRadicalChar.width,
bmRadicalChar.ascent +
bmRadicalChar.descent));
}
mContentWidth = bmBase.width;
//////////////////
// Finish reflowing child frames
PositionRowChildFrames(dx_left, aDesiredSize.ascent);
}
return NS_OK;
}
NS_IMETHODIMP
nsMathMLmencloseFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
/////////////
// paint the menclosed content
nsresult rv = nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect,
aLists);
NS_ENSURE_SUCCESS(rv, rv);
if (NS_MATHML_HAS_ERROR(mPresentationData.flags))
return rv;
nsRect mencloseRect = nsIFrame::GetRect();
mencloseRect.x = mencloseRect.y = 0;
if (IsToDraw(NOTATION_RADICAL)) {
rv = mMathMLChar[mRadicalCharIndex].Display(aBuilder, this, aLists);
NS_ENSURE_SUCCESS(rv, rv);
nsRect rect;
mMathMLChar[mRadicalCharIndex].GetRect(rect);
rect.MoveBy(NS_MATHML_IS_RTL(mPresentationData.flags) ?
-mContentWidth : rect.width, 0);
rect.SizeTo(mContentWidth, mRuleThickness);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_LONGDIV)) {
rv = mMathMLChar[mLongDivCharIndex].Display(aBuilder, this, aLists);
NS_ENSURE_SUCCESS(rv, rv);
nsRect rect;
mMathMLChar[mLongDivCharIndex].GetRect(rect);
rect.SizeTo(rect.width + mContentWidth, mRuleThickness);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_TOP)) {
nsRect rect(0, 0, mencloseRect.width, mRuleThickness);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_BOTTOM)) {
nsRect rect(0, mencloseRect.height - mRuleThickness,
mencloseRect.width, mRuleThickness);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_LEFT)) {
nsRect rect(0, 0, mRuleThickness, mencloseRect.height);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_RIGHT)) {
nsRect rect(mencloseRect.width - mRuleThickness, 0,
mRuleThickness, mencloseRect.height);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_ROUNDEDBOX)) {
rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
mRuleThickness, NOTATION_ROUNDEDBOX);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_CIRCLE)) {
rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
mRuleThickness, NOTATION_CIRCLE);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_UPDIAGONALSTRIKE)) {
rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
mRuleThickness, NOTATION_UPDIAGONALSTRIKE);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_DOWNDIAGONALSTRIKE)) {
rv = DisplayNotation(aBuilder, this, mencloseRect, aLists,
mRuleThickness, NOTATION_DOWNDIAGONALSTRIKE);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_HORIZONTALSTRIKE)) {
nsRect rect(0, mencloseRect.height / 2 - mRuleThickness / 2,
mencloseRect.width, mRuleThickness);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
if (IsToDraw(NOTATION_VERTICALSTRIKE)) {
nsRect rect(mencloseRect.width / 2 - mRuleThickness / 2, 0,
mRuleThickness, mencloseRect.height);
rv = DisplayBar(aBuilder, this, rect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
}
return rv;
}
