// get our 'form' and lookup in the Operator Dictionary to fetch
// our default data that may come from there. Then complete our setup
// using attributes that we may have. To stay in sync, this function is
// called very often. We depend on many things that may change around us.
// However, we re-use unchanged values.
void
nsMathMLmoFrame::ProcessOperatorData()
{
// if we have been here before, we will just use our cached form
nsOperatorFlags form = NS_MATHML_OPERATOR_GET_FORM(mFlags);
nsAutoString value;
float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
// special bits are always kept in mFlags.
// remember the mutable bit from ProcessTextData().
// Some chars are listed under different forms in the dictionary,
// and there could be a form under which the char is mutable.
// If the char is the core of an embellished container, we will keep
// it mutable irrespective of the form of the embellished container.
// Also remember the other special bits that we want to carry forward.
mFlags &= NS_MATHML_OPERATOR_MUTABLE |
NS_MATHML_OPERATOR_ACCENT |
NS_MATHML_OPERATOR_MOVABLELIMITS |
NS_MATHML_OPERATOR_CENTERED |
NS_MATHML_OPERATOR_INVISIBLE;
if (!mEmbellishData.coreFrame) {
// i.e., we haven't been here before, the default form is infix
form = NS_MATHML_OPERATOR_FORM_INFIX;
// reset everything so that we don't keep outdated values around
// in case of dynamic changes
mEmbellishData.flags = 0;
mEmbellishData.coreFrame = nullptr;
mEmbellishData.leadingSpace = 0;
mEmbellishData.trailingSpace = 0;
if (mMathMLChar.Length() != 1)
mEmbellishData.direction = NS_STRETCH_DIRECTION_UNSUPPORTED;
// else... retain the native direction obtained in ProcessTextData()
if (!mFrames.FirstChild()) {
return;
}
mEmbellishData.flags |= NS_MATHML_EMBELLISH_OPERATOR;
mEmbellishData.coreFrame = this;
// there are two particular things that we also need to record so that if our
// parent is <mover>, <munder>, or <munderover>, they will treat us properly:
// 1) do we have accent="true"
// 2) do we have movablelimits="true"
// they need the extra information to decide how to treat their scripts/limits
// (note: <mover>, <munder>, or <munderover> need not necessarily be our
// direct parent -- case of embellished operators)
// default values from the Operator Dictionary were obtained in ProcessTextData()
// and these special bits are always kept in mFlags
if (NS_MATHML_OPERATOR_IS_ACCENT(mFlags))
mEmbellishData.flags |= NS_MATHML_EMBELLISH_ACCENT;
if (NS_MATHML_OPERATOR_IS_MOVABLELIMITS(mFlags))
mEmbellishData.flags |= NS_MATHML_EMBELLISH_MOVABLELIMITS;
// see if the accent attribute is there
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accent_, value);
if (value.EqualsLiteral("true"))
mEmbellishData.flags |= NS_MATHML_EMBELLISH_ACCENT;
else if (value.EqualsLiteral("false"))
mEmbellishData.flags &= ~NS_MATHML_EMBELLISH_ACCENT;
// see if the movablelimits attribute is there
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::movablelimits_, value);
if (value.EqualsLiteral("true"))
mEmbellishData.flags |= NS_MATHML_EMBELLISH_MOVABLELIMITS;
else if (value.EqualsLiteral("false"))
mEmbellishData.flags &= ~NS_MATHML_EMBELLISH_MOVABLELIMITS;
// ---------------------------------------------------------------------
// we will be called again to re-sync the rest of our state next time...
// (nobody needs the other values below at this stage)
mFlags |= form;
return;
}
nsPresContext* presContext = PresContext();
// beware of bug 133814 - there is a two-way dependency in the
// embellished hierarchy: our embellished ancestors need to set
// their flags based on some of our state (set above), and here we
// need to re-sync our 'form' depending on our outermost embellished
// container. A null form here means that an earlier attempt to stretch
// our mMathMLChar failed, in which case we don't bother re-stretching again
if (form) {
// get our outermost embellished container and its parent.
// (we ensure that we are the core, not just a sibling of the core)
nsIFrame* embellishAncestor = this;
nsEmbellishData embellishData;
nsIFrame* parentAncestor = this;
do {
embellishAncestor = parentAncestor;
parentAncestor = embellishAncestor->GetParent();
GetEmbellishDataFrom(parentAncestor, embellishData);
} while (embellishData.coreFrame == this);
// flag if we have an embellished ancestor
if (embellishAncestor != this)
mFlags |= NS_MATHML_OPERATOR_EMBELLISH_ANCESTOR;
else
mFlags &= ~NS_MATHML_OPERATOR_EMBELLISH_ANCESTOR;
// find the position of our outermost embellished container w.r.t
// its siblings.
nsIFrame* nextSibling = embellishAncestor->GetNextSibling();
nsIFrame* prevSibling = embellishAncestor->GetPrevSibling();
// flag to distinguish from a real infix. Set for (embellished) operators
// that live in (inferred) mrows.
nsIMathMLFrame* mathAncestor = do_QueryFrame(parentAncestor);
bool zeroSpacing = false;
if (mathAncestor) {
zeroSpacing = !mathAncestor->IsMrowLike();
} else {
nsMathMLmathBlockFrame* blockFrame = do_QueryFrame(parentAncestor);
if (blockFrame) {
zeroSpacing = !blockFrame->IsMrowLike();
}
}
if (zeroSpacing) {
mFlags |= NS_MATHML_OPERATOR_EMBELLISH_ISOLATED;
} else {
mFlags &= ~NS_MATHML_OPERATOR_EMBELLISH_ISOLATED;
}
// find our form
form = NS_MATHML_OPERATOR_FORM_INFIX;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::form, value);
if (!value.IsEmpty()) {
if (value.EqualsLiteral("prefix"))
form = NS_MATHML_OPERATOR_FORM_PREFIX;
else if (value.EqualsLiteral("postfix"))
form = NS_MATHML_OPERATOR_FORM_POSTFIX;
}
else {
// set our form flag depending on the position
if (!prevSibling && nextSibling)
form = NS_MATHML_OPERATOR_FORM_PREFIX;
else if (prevSibling && !nextSibling)
form = NS_MATHML_OPERATOR_FORM_POSTFIX;
}
mFlags &= ~NS_MATHML_OPERATOR_FORM; // clear the old form bits
mFlags |= form;
// Use the default value suggested by the MathML REC.
// http://www.w3.org/TR/MathML/chapter3.html#presm.mo.attrs
// thickmathspace = 5/18em
float lspace = 5.0f/18.0f;
float rspace = 5.0f/18.0f;
// lookup the operator dictionary
nsAutoString data;
mMathMLChar.GetData(data);
nsMathMLOperators::LookupOperator(data, form, &mFlags, &lspace, &rspace);
// Spacing is zero if our outermost embellished operator is not in an
// inferred mrow.
if (!NS_MATHML_OPERATOR_EMBELLISH_IS_ISOLATED(mFlags) &&
(lspace || rspace)) {
// Cache the default values of lspace and rspace.
// since these values are relative to the 'em' unit, convert to twips now
nscoord em;
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
fontSizeInflation);
GetEmHeight(fm, em);
mEmbellishData.leadingSpace = NSToCoordRound(lspace * em);
mEmbellishData.trailingSpace = NSToCoordRound(rspace * em);
// tuning if we don't want too much extra space when we are a script.
// (with its fonts, TeX sets lspace=0 & rspace=0 as soon as scriptlevel>0.
// Our fonts can be anything, so...)
if (StyleFont()->mScriptLevel > 0 &&
!NS_MATHML_OPERATOR_HAS_EMBELLISH_ANCESTOR(mFlags)) {
mEmbellishData.leadingSpace /= 2;
mEmbellishData.trailingSpace /= 2;
}
}
}
// If we are an accent without explicit lspace="." or rspace=".",
// we will ignore our default leading/trailing space
// lspace
//
// "Specifies the leading space appearing before the operator"
//
// values: length
// default: set by dictionary (thickmathspace)
//
// XXXfredw Support for negative and relative values is not implemented
// (bug 805926).
// Relative values will give a multiple of the current leading space,
// which is not necessarily the default one.
//
nscoord leadingSpace = mEmbellishData.leadingSpace;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::lspace_, value);
if (!value.IsEmpty()) {
nsCSSValue cssValue;
if (nsMathMLElement::ParseNumericValue(value, cssValue, 0,
mContent->OwnerDoc())) {
if ((eCSSUnit_Number == cssValue.GetUnit()) && !cssValue.GetFloatValue())
leadingSpace = 0;
else if (cssValue.IsLengthUnit())
leadingSpace = CalcLength(presContext, mStyleContext, cssValue,
fontSizeInflation);
mFlags |= NS_MATHML_OPERATOR_LSPACE_ATTR;
}
}
// rspace
//
// "Specifies the trailing space appearing after the operator"
//
// values: length
// default: set by dictionary (thickmathspace)
//
// XXXfredw Support for negative and relative values is not implemented
// (bug 805926).
// Relative values will give a multiple of the current leading space,
// which is not necessarily the default one.
//
nscoord trailingSpace = mEmbellishData.trailingSpace;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::rspace_, value);
if (!value.IsEmpty()) {
nsCSSValue cssValue;
if (nsMathMLElement::ParseNumericValue(value, cssValue, 0,
mContent->OwnerDoc())) {
if ((eCSSUnit_Number == cssValue.GetUnit()) && !cssValue.GetFloatValue())
trailingSpace = 0;
else if (cssValue.IsLengthUnit())
trailingSpace = CalcLength(presContext, mStyleContext, cssValue,
fontSizeInflation);
mFlags |= NS_MATHML_OPERATOR_RSPACE_ATTR;
}
}
// little extra tuning to round lspace & rspace to at least a pixel so that
// operators don't look as if they are colliding with their operands
if (leadingSpace || trailingSpace) {
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
if (leadingSpace && leadingSpace < onePixel)
leadingSpace = onePixel;
if (trailingSpace && trailingSpace < onePixel)
trailingSpace = onePixel;
}
// the values that we get from our attributes override the dictionary
mEmbellishData.leadingSpace = leadingSpace;
mEmbellishData.trailingSpace = trailingSpace;
// Now see if there are user-defined attributes that override the dictionary.
// XXX Bug 1197771 - forcing an attribute to true when it is false in the
// dictionary can cause conflicts in the rest of the stretching algorithms
// (e.g. all largeops are assumed to have a vertical direction)
// For each attribute overriden by the user, turn off its bit flag.
// symmetric|movablelimits|separator|largeop|accent|fence|stretchy|form
// special: accent and movablelimits are handled above,
// don't process them here
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::stretchy_, value);
if (value.EqualsLiteral("false")) {
mFlags &= ~NS_MATHML_OPERATOR_STRETCHY;
} else if (value.EqualsLiteral("true")) {
mFlags |= NS_MATHML_OPERATOR_STRETCHY;
}
if (NS_MATHML_OPERATOR_IS_FENCE(mFlags)) {
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::fence_, value);
if (value.EqualsLiteral("false"))
mFlags &= ~NS_MATHML_OPERATOR_FENCE;
else
mEmbellishData.flags |= NS_MATHML_EMBELLISH_FENCE;
}
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::largeop_, value);
if (value.EqualsLiteral("false")) {
mFlags &= ~NS_MATHML_OPERATOR_LARGEOP;
} else if (value.EqualsLiteral("true")) {
mFlags |= NS_MATHML_OPERATOR_LARGEOP;
}
if (NS_MATHML_OPERATOR_IS_SEPARATOR(mFlags)) {
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::separator_, value);
if (value.EqualsLiteral("false"))
mFlags &= ~NS_MATHML_OPERATOR_SEPARATOR;
else
mEmbellishData.flags |= NS_MATHML_EMBELLISH_SEPARATOR;
}
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::symmetric_, value);
if (value.EqualsLiteral("false"))
mFlags &= ~NS_MATHML_OPERATOR_SYMMETRIC;
else if (value.EqualsLiteral("true"))
mFlags |= NS_MATHML_OPERATOR_SYMMETRIC;
// minsize
//
// "Specifies the minimum size of the operator when stretchy"
//
// values: length
// default: set by dictionary (1em)
//
// We don't allow negative values.
// Note: Contrary to other "length" values, unitless and percentage do not
// give a multiple of the defaut value but a multiple of the operator at
// normal size.
//
mMinSize = 0;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::minsize_, value);
if (!value.IsEmpty()) {
nsCSSValue cssValue;
if (nsMathMLElement::ParseNumericValue(value, cssValue,
nsMathMLElement::
PARSE_ALLOW_UNITLESS,
mContent->OwnerDoc())) {
nsCSSUnit unit = cssValue.GetUnit();
if (eCSSUnit_Number == unit)
mMinSize = cssValue.GetFloatValue();
else if (eCSSUnit_Percent == unit)
mMinSize = cssValue.GetPercentValue();
else if (eCSSUnit_Null != unit) {
mMinSize = float(CalcLength(presContext, mStyleContext, cssValue,
fontSizeInflation));
mFlags |= NS_MATHML_OPERATOR_MINSIZE_ABSOLUTE;
}
}
}
// maxsize
//
// "Specifies the maximum size of the operator when stretchy"
//
// values: length | "infinity"
// default: set by dictionary (infinity)
//
// We don't allow negative values.
// Note: Contrary to other "length" values, unitless and percentage do not
// give a multiple of the defaut value but a multiple of the operator at
// normal size.
//
mMaxSize = NS_MATHML_OPERATOR_SIZE_INFINITY;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::maxsize_, value);
if (!value.IsEmpty()) {
nsCSSValue cssValue;
if (nsMathMLElement::ParseNumericValue(value, cssValue,
nsMathMLElement::
PARSE_ALLOW_UNITLESS,
mContent->OwnerDoc())) {
nsCSSUnit unit = cssValue.GetUnit();
if (eCSSUnit_Number == unit)
mMaxSize = cssValue.GetFloatValue();
else if (eCSSUnit_Percent == unit)
mMaxSize = cssValue.GetPercentValue();
else if (eCSSUnit_Null != unit) {
mMaxSize = float(CalcLength(presContext, mStyleContext, cssValue,
fontSizeInflation));
mFlags |= NS_MATHML_OPERATOR_MAXSIZE_ABSOLUTE;
}
}
}
}
// NOTE: aDesiredStretchSize is an IN/OUT parameter
// On input - it contains our current size
// On output - the same size or the new size that we want
NS_IMETHODIMP
nsMathMLmoFrame::Stretch(nsRenderingContext& aRenderingContext,
nsStretchDirection aStretchDirection,
nsBoundingMetrics& aContainerSize,
nsHTMLReflowMetrics& aDesiredStretchSize)
{
if (NS_MATHML_STRETCH_WAS_DONE(mPresentationData.flags)) {
NS_WARNING("it is wrong to fire stretch more than once on a frame");
return NS_OK;
}
mPresentationData.flags |= NS_MATHML_STRETCH_DONE;
nsIFrame* firstChild = mFrames.FirstChild();
// get the axis height;
float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
fontSizeInflation);
nscoord axisHeight, height;
GetAxisHeight(aRenderingContext, fm, axisHeight);
// get the leading to be left at the top and the bottom of the stretched char
// this seems more reliable than using fm->GetLeading() on suspicious fonts
nscoord em;
GetEmHeight(fm, em);
nscoord leading = NSToCoordRound(0.2f * em);
// Operators that are stretchy, or those that are to be centered
// to cater for fonts that are not math-aware, are handled by the MathMLChar
// ('form' is reset if stretch fails -- i.e., we don't bother to stretch next time)
bool useMathMLChar = UseMathMLChar();
nsBoundingMetrics charSize;
nsBoundingMetrics container = aDesiredStretchSize.mBoundingMetrics;
bool isVertical = false;
if (((aStretchDirection == NS_STRETCH_DIRECTION_VERTICAL) ||
(aStretchDirection == NS_STRETCH_DIRECTION_DEFAULT)) &&
(mEmbellishData.direction == NS_STRETCH_DIRECTION_VERTICAL)) {
isVertical = true;
}
uint32_t stretchHint =
GetStretchHint(mFlags, mPresentationData, isVertical, StyleFont());
if (useMathMLChar) {
nsBoundingMetrics initialSize = aDesiredStretchSize.mBoundingMetrics;
if (stretchHint != NS_STRETCH_NONE) {
container = aContainerSize;
// some adjustments if the operator is symmetric and vertical
if (isVertical && NS_MATHML_OPERATOR_IS_SYMMETRIC(mFlags)) {
// we need to center about the axis
nscoord delta = std::max(container.ascent - axisHeight,
container.descent + axisHeight);
container.ascent = delta + axisHeight;
container.descent = delta - axisHeight;
// get ready in case we encounter user-desired min-max size
delta = std::max(initialSize.ascent - axisHeight,
initialSize.descent + axisHeight);
initialSize.ascent = delta + axisHeight;
initialSize.descent = delta - axisHeight;
}
// check for user-desired min-max size
if (mMaxSize != NS_MATHML_OPERATOR_SIZE_INFINITY && mMaxSize > 0.0f) {
// if we are here, there is a user defined maxsize ...
//XXX Set stretchHint = NS_STRETCH_NORMAL? to honor the maxsize as close as possible?
if (NS_MATHML_OPERATOR_MAXSIZE_IS_ABSOLUTE(mFlags)) {
// there is an explicit value like maxsize="20pt"
// try to maintain the aspect ratio of the char
float aspect = mMaxSize / float(initialSize.ascent + initialSize.descent);
container.ascent =
std::min(container.ascent, nscoord(initialSize.ascent * aspect));
container.descent =
std::min(container.descent, nscoord(initialSize.descent * aspect));
// below we use a type cast instead of a conversion to avoid a VC++ bug
// see http://support.microsoft.com/support/kb/articles/Q115/7/05.ASP
container.width =
std::min(container.width, (nscoord)mMaxSize);
}
else { // multiplicative value
container.ascent =
std::min(container.ascent, nscoord(initialSize.ascent * mMaxSize));
container.descent =
std::min(container.descent, nscoord(initialSize.descent * mMaxSize));
container.width =
std::min(container.width, nscoord(initialSize.width * mMaxSize));
}
if (isVertical && !NS_MATHML_OPERATOR_IS_SYMMETRIC(mFlags)) {
// re-adjust to align the char with the bottom of the initial container
height = container.ascent + container.descent;
container.descent = aContainerSize.descent;
container.ascent = height - container.descent;
}
}
if (mMinSize > 0.0f) {
// if we are here, there is a user defined minsize ...
// always allow the char to stretch in its natural direction,
// even if it is different from the caller's direction
if (aStretchDirection != NS_STRETCH_DIRECTION_DEFAULT &&
aStretchDirection != mEmbellishData.direction) {
aStretchDirection = NS_STRETCH_DIRECTION_DEFAULT;
// but when we are not honoring the requested direction
// we should not use the caller's container size either
container = initialSize;
}
if (NS_MATHML_OPERATOR_MINSIZE_IS_ABSOLUTE(mFlags)) {
// there is an explicit value like minsize="20pt"
// try to maintain the aspect ratio of the char
float aspect = mMinSize / float(initialSize.ascent + initialSize.descent);
container.ascent =
std::max(container.ascent, nscoord(initialSize.ascent * aspect));
container.descent =
std::max(container.descent, nscoord(initialSize.descent * aspect));
container.width =
std::max(container.width, (nscoord)mMinSize);
}
else { // multiplicative value
container.ascent =
std::max(container.ascent, nscoord(initialSize.ascent * mMinSize));
container.descent =
std::max(container.descent, nscoord(initialSize.descent * mMinSize));
container.width =
std::max(container.width, nscoord(initialSize.width * mMinSize));
}
if (isVertical && !NS_MATHML_OPERATOR_IS_SYMMETRIC(mFlags)) {
// re-adjust to align the char with the bottom of the initial container
height = container.ascent + container.descent;
container.descent = aContainerSize.descent;
container.ascent = height - container.descent;
}
}
}
// let the MathMLChar stretch itself...
nsresult res = mMathMLChar.Stretch(PresContext(), aRenderingContext,
fontSizeInflation,
aStretchDirection, container, charSize,
stretchHint,
StyleVisibility()->mDirection);
if (NS_FAILED(res)) {
// gracefully handle cases where stretching the char failed (i.e., GetBoundingMetrics failed)
// clear our 'form' to behave as if the operator wasn't in the dictionary
mFlags &= ~NS_MATHML_OPERATOR_FORM;
useMathMLChar = false;
}
}
// Place our children using the default method
// This will allow our child text frame to get its DidReflow()
nsresult rv = Place(aRenderingContext, true, aDesiredStretchSize);
if (NS_MATHML_HAS_ERROR(mPresentationData.flags) || NS_FAILED(rv)) {
// Make sure the child frames get their DidReflow() calls.
DidReflowChildren(mFrames.FirstChild());
}
if (useMathMLChar) {
// update our bounding metrics... it becomes that of our MathML char
mBoundingMetrics = charSize;
// if the returned direction is 'unsupported', the char didn't actually change.
// So we do the centering only if necessary
if (mMathMLChar.GetStretchDirection() != NS_STRETCH_DIRECTION_UNSUPPORTED ||
NS_MATHML_OPERATOR_IS_CENTERED(mFlags)) {
bool largeopOnly =
(NS_STRETCH_LARGEOP & stretchHint) != 0 &&
(NS_STRETCH_VARIABLE_MASK & stretchHint) == 0;
if (isVertical || NS_MATHML_OPERATOR_IS_CENTERED(mFlags)) {
// the desired size returned by mMathMLChar maybe different
// from the size of the container.
// the mMathMLChar.mRect.y calculation is subtle, watch out!!!
height = mBoundingMetrics.ascent + mBoundingMetrics.descent;
if (NS_MATHML_OPERATOR_IS_SYMMETRIC(mFlags) ||
NS_MATHML_OPERATOR_IS_CENTERED(mFlags)) {
// For symmetric and vertical operators, or for operators that are always
// centered ('+', '*', etc) we want to center about the axis of the container
mBoundingMetrics.descent = height/2 - axisHeight;
} else if (!largeopOnly) {
// Align the center of the char with the center of the container
mBoundingMetrics.descent = height/2 +
(container.ascent + container.descent)/2 - container.ascent;
} // else align the baselines
mBoundingMetrics.ascent = height - mBoundingMetrics.descent;
}
}
}
// Fixup for the final height.
// On one hand, our stretchy height can sometimes be shorter than surrounding
// ASCII chars, e.g., arrow symbols have |mBoundingMetrics.ascent + leading|
// that is smaller than the ASCII's ascent, hence when painting the background
// later, it won't look uniform along the line.
// On the other hand, sometimes we may leave too much gap when our glyph happens
// to come from a font with tall glyphs. For example, since CMEX10 has very tall
// glyphs, its natural font metrics are large, even if we pick a small glyph
// whose size is comparable to the size of a normal ASCII glyph.
// So to avoid uneven spacing in either of these two cases, we use the height
// of the ASCII font as a reference and try to match it if possible.
// special case for accents... keep them short to improve mouse operations...
// an accent can only be the non-first child of <mover>, <munder>, <munderover>
bool isAccent =
NS_MATHML_EMBELLISH_IS_ACCENT(mEmbellishData.flags);
if (isAccent) {
nsEmbellishData parentData;
GetEmbellishDataFrom(GetParent(), parentData);
isAccent =
(NS_MATHML_EMBELLISH_IS_ACCENTOVER(parentData.flags) ||
NS_MATHML_EMBELLISH_IS_ACCENTUNDER(parentData.flags)) &&
parentData.coreFrame != this;
}
if (isAccent && firstChild) {
// see bug 188467 for what is going on here
nscoord dy = aDesiredStretchSize.BlockStartAscent() -
(mBoundingMetrics.ascent + leading);
aDesiredStretchSize.SetBlockStartAscent(mBoundingMetrics.ascent + leading);
aDesiredStretchSize.Height() = aDesiredStretchSize.BlockStartAscent() +
mBoundingMetrics.descent;
firstChild->SetPosition(firstChild->GetPosition() - nsPoint(0, dy));
}
else if (useMathMLChar) {
nscoord ascent = fm->MaxAscent();
nscoord descent = fm->MaxDescent();
aDesiredStretchSize.SetBlockStartAscent(std::max(mBoundingMetrics.ascent + leading, ascent));
aDesiredStretchSize.Height() = aDesiredStretchSize.BlockStartAscent() +
std::max(mBoundingMetrics.descent + leading, descent);
}
aDesiredStretchSize.Width() = mBoundingMetrics.width;
aDesiredStretchSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredStretchSize.BlockStartAscent();
// Place our mMathMLChar, its origin is in our coordinate system
if (useMathMLChar) {
nscoord dy = aDesiredStretchSize.BlockStartAscent() - mBoundingMetrics.ascent;
mMathMLChar.SetRect(nsRect(0, dy, charSize.width, charSize.ascent + charSize.descent));
}
// Before we leave... there is a last item in the check-list:
// If our parent is not embellished, it means we are the outermost embellished
// container and so we put the spacing, otherwise we don't include the spacing,
// the outermost embellished container will take care of it.
if (!NS_MATHML_OPERATOR_HAS_EMBELLISH_ANCESTOR(mFlags)) {
// Account the spacing if we are not an accent with explicit attributes
nscoord leadingSpace = mEmbellishData.leadingSpace;
if (isAccent && !NS_MATHML_OPERATOR_HAS_LSPACE_ATTR(mFlags)) {
leadingSpace = 0;
}
nscoord trailingSpace = mEmbellishData.trailingSpace;
if (isAccent && !NS_MATHML_OPERATOR_HAS_RSPACE_ATTR(mFlags)) {
trailingSpace = 0;
}
mBoundingMetrics.width += leadingSpace + trailingSpace;
aDesiredStretchSize.Width() = mBoundingMetrics.width;
aDesiredStretchSize.mBoundingMetrics.width = mBoundingMetrics.width;
nscoord dx = (StyleVisibility()->mDirection ?
trailingSpace : leadingSpace);
if (dx) {
// adjust the offsets
mBoundingMetrics.leftBearing += dx;
mBoundingMetrics.rightBearing += dx;
aDesiredStretchSize.mBoundingMetrics.leftBearing += dx;
aDesiredStretchSize.mBoundingMetrics.rightBearing += dx;
if (useMathMLChar) {
nsRect rect;
mMathMLChar.GetRect(rect);
mMathMLChar.SetRect(nsRect(rect.x + dx, rect.y,
rect.width, rect.height));
}
else {
nsIFrame* childFrame = firstChild;
while (childFrame) {
childFrame->SetPosition(childFrame->GetPosition() +
nsPoint(dx, 0));
childFrame = childFrame->GetNextSibling();
}
}
}
}
// Finished with these:
ClearSavedChildMetrics();
// Set our overflow area
GatherAndStoreOverflow(&aDesiredStretchSize);
// There used to be code here to change the height of the child frame to
// change the caret height, but the text frame that manages the caret is now
// not a direct child but wrapped in a block frame. See also bug 412033.
return NS_OK;
}
// get the text that we enclose and setup our nsMathMLChar
void
nsMathMLmoFrame::ProcessTextData()
{
mFlags = 0;
nsAutoString data;
nsContentUtils::GetNodeTextContent(mContent, false, data);
data.CompressWhitespace();
int32_t length = data.Length();
char16_t ch = (length == 0) ? char16_t('\0') : data[0];
if ((length == 1) &&
(ch == kApplyFunction ||
ch == kInvisibleSeparator ||
ch == kInvisiblePlus ||
ch == kInvisibleTimes)) {
mFlags |= NS_MATHML_OPERATOR_INVISIBLE;
}
// don't bother doing anything special if we don't have a single child
nsPresContext* presContext = PresContext();
if (mFrames.GetLength() != 1) {
data.Truncate(); // empty data to reset the char
mMathMLChar.SetData(presContext, data);
ResolveMathMLCharStyle(presContext, mContent, mStyleContext, &mMathMLChar);
return;
}
// special... in math mode, the usual minus sign '-' looks too short, so
// what we do here is to remap <mo>-</mo> to the official Unicode minus
// sign (U+2212) which looks much better. For background on this, see
// http://groups.google.com/groups?hl=en&th=66488daf1ade7635&rnum=1
if (1 == length && ch == '-') {
ch = 0x2212;
data = ch;
}
// cache the special bits: mutable, accent, movablelimits, centered.
// we need to do this in anticipation of other requirements, and these
// bits don't change. Do not reset these bits unless the text gets changed.
// lookup all the forms under which the operator is listed in the dictionary,
// and record whether the operator has accent="true" or movablelimits="true"
nsOperatorFlags flags[4];
float lspace[4], rspace[4];
nsMathMLOperators::LookupOperators(data, flags, lspace, rspace);
nsOperatorFlags allFlags =
flags[NS_MATHML_OPERATOR_FORM_INFIX] |
flags[NS_MATHML_OPERATOR_FORM_POSTFIX] |
flags[NS_MATHML_OPERATOR_FORM_PREFIX];
mFlags |= allFlags & NS_MATHML_OPERATOR_ACCENT;
mFlags |= allFlags & NS_MATHML_OPERATOR_MOVABLELIMITS;
// see if this is an operator that should be centered to cater for
// fonts that are not math-aware
if (1 == length) {
if ((ch == '+') || (ch == '=') || (ch == '*') ||
(ch == 0x2212) || // −
(ch == 0x2264) || // ≤
(ch == 0x2265) || // ≥
(ch == 0x00D7)) { // ×
mFlags |= NS_MATHML_OPERATOR_CENTERED;
}
}
// cache the operator
mMathMLChar.SetData(presContext, data);
// cache the native direction -- beware of bug 133429...
// mEmbellishData.direction must always retain our native direction, whereas
// mMathMLChar.GetStretchDirection() may change later, when Stretch() is called
mEmbellishData.direction = mMathMLChar.GetStretchDirection();
bool isMutable =
NS_MATHML_OPERATOR_IS_LARGEOP(allFlags) ||
(mEmbellishData.direction != NS_STRETCH_DIRECTION_UNSUPPORTED);
if (isMutable)
mFlags |= NS_MATHML_OPERATOR_MUTABLE;
ResolveMathMLCharStyle(presContext, mContent, mStyleContext, &mMathMLChar);
}
/* virtual */ nsresult
nsMathMLmmultiscriptsFrame::Place(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize)
{
////////////////////////////////////
// Get the children's desired sizes
nscoord minShiftFromXHeight, subDrop, supDrop;
////////////////////////////////////////
// Initialize super/sub shifts that
// depend only on the current font
////////////////////////////////////////
ProcessAttributes();
// get x-height (an ex)
const nsStyleFont* font = GetStyleFont();
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aRenderingContext.SetFont(fm);
nscoord xHeight = fm->XHeight();
nscoord ruleSize;
GetRuleThickness (aRenderingContext, fm, ruleSize);
// scriptspace from TeX for extra spacing after sup/subscript (0.5pt in plain TeX)
// forced to be at least 1 pixel here
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
nscoord scriptSpace = NS_MAX(nsPresContext::CSSPointsToAppUnits(0.5f), onePixel);
/////////////////////////////////////
// first the shift for the subscript
// subScriptShift{1,2}
// = minimum amount to shift the subscript down
// = sub{1,2} in TeXbook
// subScriptShift1 = subscriptshift attribute * x-height
nscoord subScriptShift1, subScriptShift2;
// Get subScriptShift{1,2} default from font
GetSubScriptShifts (fm, subScriptShift1, subScriptShift2);
if (0 < mSubScriptShift) {
// the user has set the subscriptshift attribute
float scaler = ((float) subScriptShift2) / subScriptShift1;
subScriptShift1 = NS_MAX(subScriptShift1, mSubScriptShift);
subScriptShift2 = NSToCoordRound(scaler * subScriptShift1);
}
// the font dependent shift
nscoord subScriptShift = NS_MAX(subScriptShift1,subScriptShift2);
/////////////////////////////////////
// next the shift for the superscript
// supScriptShift{1,2,3}
// = minimum amount to shift the supscript up
// = sup{1,2,3} in TeX
// supScriptShift1 = superscriptshift attribute * x-height
// Note that there are THREE values for supscript shifts depending
// on the current style
nscoord supScriptShift1, supScriptShift2, supScriptShift3;
// Set supScriptShift{1,2,3} default from font
GetSupScriptShifts (fm, supScriptShift1, supScriptShift2, supScriptShift3);
if (0 < mSupScriptShift) {
// the user has set the superscriptshift attribute
float scaler2 = ((float) supScriptShift2) / supScriptShift1;
float scaler3 = ((float) supScriptShift3) / supScriptShift1;
supScriptShift1 = NS_MAX(supScriptShift1, mSupScriptShift);
supScriptShift2 = NSToCoordRound(scaler2 * supScriptShift1);
supScriptShift3 = NSToCoordRound(scaler3 * supScriptShift1);
}
// get sup script shift depending on current script level and display style
// Rule 18c, App. G, TeXbook
nscoord supScriptShift;
if ( font->mScriptLevel == 0 &&
NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags) &&
!NS_MATHML_IS_COMPRESSED(mPresentationData.flags)) {
// Style D in TeXbook
supScriptShift = supScriptShift1;
}
else if (NS_MATHML_IS_COMPRESSED(mPresentationData.flags)) {
// Style C' in TeXbook = D',T',S',SS'
supScriptShift = supScriptShift3;
}
else {
// everything else = T,S,SS
supScriptShift = supScriptShift2;
}
////////////////////////////////////
// Get the children's sizes
////////////////////////////////////
nscoord width = 0, prescriptsWidth = 0, rightBearing = 0;
nsIFrame* mprescriptsFrame = nsnull; // frame of <mprescripts/>, if there.
bool isSubScript = false;
nscoord minSubScriptShift = 0, minSupScriptShift = 0;
nscoord trySubScriptShift = subScriptShift;
nscoord trySupScriptShift = supScriptShift;
nscoord maxSubScriptShift = subScriptShift;
nscoord maxSupScriptShift = supScriptShift;
PRInt32 count = 0;
nsHTMLReflowMetrics baseSize;
nsHTMLReflowMetrics subScriptSize;
nsHTMLReflowMetrics supScriptSize;
nsIFrame* baseFrame = nsnull;
nsIFrame* subScriptFrame = nsnull;
nsIFrame* supScriptFrame = nsnull;
bool firstPrescriptsPair = false;
nsBoundingMetrics bmBase, bmSubScript, bmSupScript;
nscoord italicCorrection = 0;
mBoundingMetrics.width = 0;
mBoundingMetrics.ascent = mBoundingMetrics.descent = -0x7FFFFFFF;
nscoord ascent = -0x7FFFFFFF, descent = -0x7FFFFFFF;
aDesiredSize.width = aDesiredSize.height = 0;
nsIFrame* childFrame = mFrames.FirstChild();
while (childFrame) {
if (childFrame->GetContent()->Tag() == nsGkAtoms::mprescripts_) {
if (mprescriptsFrame) {
// duplicate <mprescripts/> found
// report an error, encourage people to get their markups in order
return ReflowError(aRenderingContext, aDesiredSize);
}
mprescriptsFrame = childFrame;
firstPrescriptsPair = true;
}
else {
if (0 == count) {
// base
baseFrame = childFrame;
GetReflowAndBoundingMetricsFor(baseFrame, baseSize, bmBase);
GetItalicCorrection(bmBase, italicCorrection);
// for the superscript, we always add "a little to spare"
italicCorrection += onePixel;
// we update mBoundingMetrics.{ascent,descent} with that
// of the baseFrame only after processing all the sup/sub pairs
// XXX need italic correction only *if* there are postscripts ?
mBoundingMetrics.width = bmBase.width + italicCorrection;
mBoundingMetrics.rightBearing = bmBase.rightBearing;
mBoundingMetrics.leftBearing = bmBase.leftBearing; // until overwritten
}
else {
// super/subscript block
if (isSubScript) {
// subscript
subScriptFrame = childFrame;
GetReflowAndBoundingMetricsFor(subScriptFrame, subScriptSize, bmSubScript);
// get the subdrop from the subscript font
GetSubDropFromChild (subScriptFrame, subDrop);
// parameter v, Rule 18a, App. G, TeXbook
minSubScriptShift = bmBase.descent + subDrop;
trySubScriptShift = NS_MAX(minSubScriptShift,subScriptShift);
mBoundingMetrics.descent =
NS_MAX(mBoundingMetrics.descent,bmSubScript.descent);
descent = NS_MAX(descent,subScriptSize.height - subScriptSize.ascent);
width = bmSubScript.width + scriptSpace;
rightBearing = bmSubScript.rightBearing;
}
else {
// supscript
supScriptFrame = childFrame;
GetReflowAndBoundingMetricsFor(supScriptFrame, supScriptSize, bmSupScript);
// get the supdrop from the supscript font
GetSupDropFromChild (supScriptFrame, supDrop);
// parameter u, Rule 18a, App. G, TeXbook
minSupScriptShift = bmBase.ascent - supDrop;
// get min supscript shift limit from x-height
// = d(x) + 1/4 * sigma_5, Rule 18c, App. G, TeXbook
minShiftFromXHeight = NSToCoordRound
((bmSupScript.descent + (1.0f/4.0f) * xHeight));
trySupScriptShift =
NS_MAX(minSupScriptShift,NS_MAX(minShiftFromXHeight,supScriptShift));
mBoundingMetrics.ascent =
NS_MAX(mBoundingMetrics.ascent,bmSupScript.ascent);
ascent = NS_MAX(ascent,supScriptSize.ascent);
width = NS_MAX(width, bmSupScript.width + scriptSpace);
rightBearing = NS_MAX(rightBearing, bmSupScript.rightBearing);
if (!mprescriptsFrame) { // we are still looping over base & postscripts
mBoundingMetrics.rightBearing = mBoundingMetrics.width + rightBearing;
mBoundingMetrics.width += width;
}
else {
prescriptsWidth += width;
if (firstPrescriptsPair) {
firstPrescriptsPair = false;
mBoundingMetrics.leftBearing =
NS_MIN(bmSubScript.leftBearing, bmSupScript.leftBearing);
}
}
width = rightBearing = 0;
// negotiate between the various shifts so that
// there is enough gap between the sup and subscripts
// Rule 18e, App. G, TeXbook
nscoord gap =
(trySupScriptShift - bmSupScript.descent) -
(bmSubScript.ascent - trySubScriptShift);
if (gap < 4.0f * ruleSize) {
// adjust trySubScriptShift to get a gap of (4.0 * ruleSize)
trySubScriptShift += NSToCoordRound ((4.0f * ruleSize) - gap);
}
// next we want to ensure that the bottom of the superscript
// will be > (4/5) * x-height above baseline
gap = NSToCoordRound ((4.0f/5.0f) * xHeight -
(trySupScriptShift - bmSupScript.descent));
if (gap > 0.0f) {
trySupScriptShift += gap;
trySubScriptShift -= gap;
}
maxSubScriptShift = NS_MAX(maxSubScriptShift, trySubScriptShift);
maxSupScriptShift = NS_MAX(maxSupScriptShift, trySupScriptShift);
trySubScriptShift = subScriptShift;
trySupScriptShift = supScriptShift;
}
}
isSubScript = !isSubScript;
}
count++;
childFrame = childFrame->GetNextSibling();
}
// note: width=0 if all sup-sub pairs match correctly
if ((0 != width) || !baseFrame || !subScriptFrame || !supScriptFrame) {
// report an error, encourage people to get their markups in order
return ReflowError(aRenderingContext, aDesiredSize);
}
// we left out the width of prescripts, so ...
mBoundingMetrics.rightBearing += prescriptsWidth;
mBoundingMetrics.width += prescriptsWidth;
// we left out the base during our bounding box updates, so ...
mBoundingMetrics.ascent =
NS_MAX(mBoundingMetrics.ascent+maxSupScriptShift,bmBase.ascent);
mBoundingMetrics.descent =
NS_MAX(mBoundingMetrics.descent+maxSubScriptShift,bmBase.descent);
// get the reflow metrics ...
aDesiredSize.ascent =
NS_MAX(ascent+maxSupScriptShift,baseSize.ascent);
aDesiredSize.height = aDesiredSize.ascent +
NS_MAX(descent+maxSubScriptShift,baseSize.height - baseSize.ascent);
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
//////////////////
// Place Children
// Place prescripts, followed by base, and then postscripts.
// The list of frames is in the order: {base} {postscripts} {prescripts}
// We go over the list in a circular manner, starting at <prescripts/>
if (aPlaceOrigin) {
nscoord dx = 0, dy = 0;
count = 0;
childFrame = mprescriptsFrame;
do {
if (!childFrame) { // end of prescripts,
// place the base ...
childFrame = baseFrame;
dy = aDesiredSize.ascent - baseSize.ascent;
FinishReflowChild (baseFrame, PresContext(), nsnull, baseSize, dx, dy, 0);
dx += bmBase.width + italicCorrection;
}
else if (mprescriptsFrame != childFrame) {
// process each sup/sub pair
if (0 == count) {
subScriptFrame = childFrame;
count = 1;
}
else if (1 == count) {
supScriptFrame = childFrame;
count = 0;
// get the ascent/descent of sup/subscripts stored in their rects
// rect.x = descent, rect.y = ascent
GetReflowAndBoundingMetricsFor(subScriptFrame, subScriptSize, bmSubScript);
GetReflowAndBoundingMetricsFor(supScriptFrame, supScriptSize, bmSupScript);
// center w.r.t. largest width
width = NS_MAX(subScriptSize.width, supScriptSize.width);
dy = aDesiredSize.ascent - subScriptSize.ascent +
maxSubScriptShift;
FinishReflowChild (subScriptFrame, PresContext(), nsnull, subScriptSize,
dx + (width-subScriptSize.width)/2, dy, 0);
dy = aDesiredSize.ascent - supScriptSize.ascent -
maxSupScriptShift;
FinishReflowChild (supScriptFrame, PresContext(), nsnull, supScriptSize,
dx + (width-supScriptSize.width)/2, dy, 0);
dx += width + scriptSpace;
}
}
childFrame = childFrame->GetNextSibling();
} while (mprescriptsFrame != childFrame);
}
return NS_OK;
}
/* virtual */ nsresult
nsMathMLmunderoverFrame::Place(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize)
{
float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
if (NS_MATHML_EMBELLISH_IS_MOVABLELIMITS(mEmbellishData.flags) &&
StyleFont()->mMathDisplay == NS_MATHML_DISPLAYSTYLE_INLINE) {
//place like sub sup or subsup
if (mContent->IsMathMLElement(nsGkAtoms::munderover_)) {
return nsMathMLmmultiscriptsFrame::PlaceMultiScript(PresContext(),
aRenderingContext,
aPlaceOrigin,
aDesiredSize,
this, 0, 0,
fontSizeInflation);
} else if (mContent->IsMathMLElement( nsGkAtoms::munder_)) {
return nsMathMLmmultiscriptsFrame::PlaceMultiScript(PresContext(),
aRenderingContext,
aPlaceOrigin,
aDesiredSize,
this, 0, 0,
fontSizeInflation);
} else {
NS_ASSERTION(mContent->IsMathMLElement(nsGkAtoms::mover_),
"mContent->NodeInfo()->NameAtom() not recognized");
return nsMathMLmmultiscriptsFrame::PlaceMultiScript(PresContext(),
aRenderingContext,
aPlaceOrigin,
aDesiredSize,
this, 0, 0,
fontSizeInflation);
}
}
////////////////////////////////////
// Get the children's desired sizes
nsBoundingMetrics bmBase, bmUnder, bmOver;
nsHTMLReflowMetrics baseSize(aDesiredSize.GetWritingMode());
nsHTMLReflowMetrics underSize(aDesiredSize.GetWritingMode());
nsHTMLReflowMetrics overSize(aDesiredSize.GetWritingMode());
nsIFrame* overFrame = nullptr;
nsIFrame* underFrame = nullptr;
nsIFrame* baseFrame = mFrames.FirstChild();
underSize.SetBlockStartAscent(0);
overSize.SetBlockStartAscent(0);
bool haveError = false;
if (baseFrame) {
if (mContent->IsAnyOfMathMLElements(nsGkAtoms::munder_,
nsGkAtoms::munderover_)) {
underFrame = baseFrame->GetNextSibling();
} else if (mContent->IsMathMLElement(nsGkAtoms::mover_)) {
overFrame = baseFrame->GetNextSibling();
}
}
if (underFrame && mContent->IsMathMLElement(nsGkAtoms::munderover_)) {
overFrame = underFrame->GetNextSibling();
}
if (mContent->IsMathMLElement(nsGkAtoms::munder_)) {
if (!baseFrame || !underFrame || underFrame->GetNextSibling()) {
// report an error, encourage people to get their markups in order
haveError = true;
}
}
if (mContent->IsMathMLElement(nsGkAtoms::mover_)) {
if (!baseFrame || !overFrame || overFrame->GetNextSibling()) {
// report an error, encourage people to get their markups in order
haveError = true;
}
}
if (mContent->IsMathMLElement(nsGkAtoms::munderover_)) {
if (!baseFrame || !underFrame || !overFrame || overFrame->GetNextSibling()) {
// report an error, encourage people to get their markups in order
haveError = true;
}
}
if (haveError) {
if (aPlaceOrigin) {
ReportChildCountError();
}
return ReflowError(aRenderingContext, aDesiredSize);
}
GetReflowAndBoundingMetricsFor(baseFrame, baseSize, bmBase);
if (underFrame) {
GetReflowAndBoundingMetricsFor(underFrame, underSize, bmUnder);
}
if (overFrame) {
GetReflowAndBoundingMetricsFor(overFrame, overSize, bmOver);
}
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
////////////////////
// Place Children
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
fontSizeInflation);
nscoord xHeight = fm->XHeight();
nscoord oneDevPixel = fm->AppUnitsPerDevPixel();
gfxFont* mathFont = fm->GetThebesFontGroup()->GetFirstMathFont();
nscoord ruleThickness;
GetRuleThickness (aRenderingContext, fm, ruleThickness);
nscoord correction = 0;
GetItalicCorrection (bmBase, correction);
// there are 2 different types of placement depending on
// whether we want an accented under or not
nscoord underDelta1 = 0; // gap between base and underscript
nscoord underDelta2 = 0; // extra space beneath underscript
if (!NS_MATHML_EMBELLISH_IS_ACCENTUNDER(mEmbellishData.flags)) {
// Rule 13a, App. G, TeXbook
nscoord bigOpSpacing2, bigOpSpacing4, bigOpSpacing5, dummy;
GetBigOpSpacings (fm,
dummy, bigOpSpacing2,
dummy, bigOpSpacing4,
bigOpSpacing5);
if (mathFont) {
// XXXfredw The Open Type MATH table has some StretchStack* parameters
// that we may use when the base is a stretchy horizontal operator. See
// bug 963131.
bigOpSpacing2 =
mathFont->GetMathConstant(gfxFontEntry::LowerLimitGapMin,
oneDevPixel);
bigOpSpacing4 =
mathFont->GetMathConstant(gfxFontEntry::LowerLimitBaselineDropMin,
oneDevPixel);
bigOpSpacing5 = 0;
}
underDelta1 = std::max(bigOpSpacing2, (bigOpSpacing4 - bmUnder.ascent));
underDelta2 = bigOpSpacing5;
}
else {
// No corresponding rule in TeXbook - we are on our own here
// XXX tune the gap delta between base and underscript
// XXX Should we use Rule 10 like \underline does?
// XXXfredw Perhaps use the Underbar* parameters of the MATH table. See
// bug 963125.
underDelta1 = ruleThickness + onePixel/2;
underDelta2 = ruleThickness;
}
// empty under?
if (!(bmUnder.ascent + bmUnder.descent)) {
underDelta1 = 0;
underDelta2 = 0;
}
nscoord overDelta1 = 0; // gap between base and overscript
nscoord overDelta2 = 0; // extra space above overscript
if (!NS_MATHML_EMBELLISH_IS_ACCENTOVER(mEmbellishData.flags)) {
// Rule 13a, App. G, TeXbook
// XXXfredw The Open Type MATH table has some StretchStack* parameters
// that we may use when the base is a stretchy horizontal operator. See
// bug 963131.
nscoord bigOpSpacing1, bigOpSpacing3, bigOpSpacing5, dummy;
GetBigOpSpacings (fm,
bigOpSpacing1, dummy,
bigOpSpacing3, dummy,
bigOpSpacing5);
if (mathFont) {
// XXXfredw The Open Type MATH table has some StretchStack* parameters
// that we may use when the base is a stretchy horizontal operator. See
// bug 963131.
bigOpSpacing1 =
mathFont->GetMathConstant(gfxFontEntry::UpperLimitGapMin,
oneDevPixel);
bigOpSpacing3 =
mathFont->GetMathConstant(gfxFontEntry::UpperLimitBaselineRiseMin,
oneDevPixel);
bigOpSpacing5 = 0;
}
overDelta1 = std::max(bigOpSpacing1, (bigOpSpacing3 - bmOver.descent));
overDelta2 = bigOpSpacing5;
// XXX This is not a TeX rule...
// delta1 (as computed abvove) can become really big when bmOver.descent is
// negative, e.g., if the content is &OverBar. In such case, we use the height
if (bmOver.descent < 0)
overDelta1 = std::max(bigOpSpacing1, (bigOpSpacing3 - (bmOver.ascent + bmOver.descent)));
}
else {
// Rule 12, App. G, TeXbook
// We are going to modify this rule to make it more general.
// The idea behind Rule 12 in the TeXBook is to keep the accent
// as close to the base as possible, while ensuring that the
// distance between the *baseline* of the accent char and
// the *baseline* of the base is atleast x-height.
// The idea is that for normal use, we would like all the accents
// on a line to line up atleast x-height above the baseline
// if possible.
// When the ascent of the base is >= x-height,
// the baseline of the accent char is placed just above the base
// (specifically, the baseline of the accent char is placed
// above the baseline of the base by the ascent of the base).
// For ease of implementation,
// this assumes that the font-designer designs accents
// in such a way that the bottom of the accent is atleast x-height
// above its baseline, otherwise there will be collisions
// with the base. Also there should be proper padding between
// the bottom of the accent char and its baseline.
// The above rule may not be obvious from a first
// reading of rule 12 in the TeXBook !!!
// The mathml <mover> tag can use accent chars that
// do not follow this convention. So we modify TeX's rule
// so that TeX's rule gets subsumed for accents that follow
// TeX's convention,
// while also allowing accents that do not follow the convention :
// we try to keep the *bottom* of the accent char atleast x-height
// from the baseline of the base char. we also slap on an extra
// padding between the accent and base chars.
overDelta1 = ruleThickness + onePixel/2;
nscoord accentBaseHeight = xHeight;
if (mathFont) {
accentBaseHeight =
mathFont->GetMathConstant(gfxFontEntry::AccentBaseHeight,
oneDevPixel);
}
if (bmBase.ascent < accentBaseHeight) {
// also ensure at least accentBaseHeight above the baseline of the base
overDelta1 += accentBaseHeight - bmBase.ascent;
}
overDelta2 = ruleThickness;
}
// empty over?
if (!(bmOver.ascent + bmOver.descent)) {
overDelta1 = 0;
overDelta2 = 0;
}
nscoord dxBase = 0, dxOver = 0, dxUnder = 0;
nsAutoString valueAlign;
enum {
center,
left,
right
} alignPosition = center;
if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::align, valueAlign)) {
if (valueAlign.EqualsLiteral("left")) {
alignPosition = left;
} else if (valueAlign.EqualsLiteral("right")) {
alignPosition = right;
}
}
//////////
// pass 1, do what <mover> does: attach the overscript on the base
// Ad-hoc - This is to override fonts which have ready-made _accent_
// glyphs with negative lbearing and rbearing. We want to position
// the overscript ourselves
nscoord overWidth = bmOver.width;
if (!overWidth && (bmOver.rightBearing - bmOver.leftBearing > 0)) {
overWidth = bmOver.rightBearing - bmOver.leftBearing;
dxOver = -bmOver.leftBearing;
}
if (NS_MATHML_EMBELLISH_IS_ACCENTOVER(mEmbellishData.flags)) {
mBoundingMetrics.width = bmBase.width;
if (alignPosition == center) {
dxOver += correction;
}
}
else {
mBoundingMetrics.width = std::max(bmBase.width, overWidth);
if (alignPosition == center) {
dxOver += correction/2;
}
}
if (alignPosition == center) {
dxOver += (mBoundingMetrics.width - overWidth)/2;
dxBase = (mBoundingMetrics.width - bmBase.width)/2;
} else if (alignPosition == right) {
dxOver += mBoundingMetrics.width - overWidth;
dxBase = mBoundingMetrics.width - bmBase.width;
}
mBoundingMetrics.ascent =
bmBase.ascent + overDelta1 + bmOver.ascent + bmOver.descent;
mBoundingMetrics.descent = bmBase.descent;
mBoundingMetrics.leftBearing =
std::min(dxBase + bmBase.leftBearing, dxOver + bmOver.leftBearing);
mBoundingMetrics.rightBearing =
std::max(dxBase + bmBase.rightBearing, dxOver + bmOver.rightBearing);
//////////
// pass 2, do what <munder> does: attach the underscript on the previous
// result. We conceptually view the previous result as an "anynomous base"
// from where to attach the underscript. Hence if the underscript is empty,
// we should end up like <mover>. If the overscript is empty, we should
// end up like <munder>.
nsBoundingMetrics bmAnonymousBase = mBoundingMetrics;
nscoord ascentAnonymousBase =
std::max(mBoundingMetrics.ascent + overDelta2,
overSize.BlockStartAscent() + bmOver.descent +
overDelta1 + bmBase.ascent);
ascentAnonymousBase = std::max(ascentAnonymousBase,
baseSize.BlockStartAscent());
// Width of non-spacing marks is zero so use left and right bearing.
nscoord underWidth = bmUnder.width;
if (!underWidth) {
underWidth = bmUnder.rightBearing - bmUnder.leftBearing;
dxUnder = -bmUnder.leftBearing;
}
nscoord maxWidth = std::max(bmAnonymousBase.width, underWidth);
if (alignPosition == center &&
!NS_MATHML_EMBELLISH_IS_ACCENTUNDER(mEmbellishData.flags)) {
GetItalicCorrection(bmAnonymousBase, correction);
dxUnder += -correction/2;
}
nscoord dxAnonymousBase = 0;
if (alignPosition == center) {
dxUnder += (maxWidth - underWidth)/2;
dxAnonymousBase = (maxWidth - bmAnonymousBase.width)/2;
} else if (alignPosition == right) {
dxUnder += maxWidth - underWidth;
dxAnonymousBase = maxWidth - bmAnonymousBase.width;
}
// adjust the offsets of the real base and overscript since their
// final offsets should be relative to us...
dxOver += dxAnonymousBase;
dxBase += dxAnonymousBase;
mBoundingMetrics.width =
std::max(dxAnonymousBase + bmAnonymousBase.width, dxUnder + bmUnder.width);
// At this point, mBoundingMetrics.ascent = bmAnonymousBase.ascent
mBoundingMetrics.descent =
bmAnonymousBase.descent + underDelta1 + bmUnder.ascent + bmUnder.descent;
mBoundingMetrics.leftBearing =
std::min(dxAnonymousBase + bmAnonymousBase.leftBearing, dxUnder + bmUnder.leftBearing);
mBoundingMetrics.rightBearing =
std::max(dxAnonymousBase + bmAnonymousBase.rightBearing, dxUnder + bmUnder.rightBearing);
aDesiredSize.SetBlockStartAscent(ascentAnonymousBase);
aDesiredSize.Height() = aDesiredSize.BlockStartAscent() +
std::max(mBoundingMetrics.descent + underDelta2,
bmAnonymousBase.descent + underDelta1 + bmUnder.ascent +
underSize.Height() - underSize.BlockStartAscent());
aDesiredSize.Height() = std::max(aDesiredSize.Height(),
aDesiredSize.BlockStartAscent() +
baseSize.Height() - baseSize.BlockStartAscent());
aDesiredSize.Width() = mBoundingMetrics.width;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.BlockStartAscent();
if (aPlaceOrigin) {
nscoord dy;
// place overscript
if (overFrame) {
dy = aDesiredSize.BlockStartAscent() -
mBoundingMetrics.ascent + bmOver.ascent -
overSize.BlockStartAscent();
FinishReflowChild (overFrame, PresContext(), overSize, nullptr, dxOver, dy, 0);
}
// place base
dy = aDesiredSize.BlockStartAscent() - baseSize.BlockStartAscent();
FinishReflowChild (baseFrame, PresContext(), baseSize, nullptr, dxBase, dy, 0);
// place underscript
if (underFrame) {
dy = aDesiredSize.BlockStartAscent() +
mBoundingMetrics.descent - bmUnder.descent -
underSize.BlockStartAscent();
FinishReflowChild (underFrame, PresContext(), underSize, nullptr,
dxUnder, dy, 0);
}
}
return NS_OK;
}
nsMenuFrame*
nsMenuBarFrame::FindMenuWithShortcut(nsIDOMKeyEvent* aKeyEvent)
{
PRUint32 charCode;
aKeyEvent->GetCharCode(&charCode);
nsAutoTArray<PRUint32, 10> accessKeys;
nsEvent* nativeEvent = nsContentUtils::GetNativeEvent(aKeyEvent);
nsKeyEvent* nativeKeyEvent = static_cast<nsKeyEvent*>(nativeEvent);
if (nativeKeyEvent)
nsContentUtils::GetAccessKeyCandidates(nativeKeyEvent, accessKeys);
if (accessKeys.IsEmpty() && charCode)
accessKeys.AppendElement(charCode);
if (accessKeys.IsEmpty())
return nsnull; // no character was pressed so just return
// Enumerate over our list of frames.
nsIFrame* immediateParent = nsnull;
GetInsertionPoint(PresContext()->PresShell(), this, nsnull, &immediateParent);
if (!immediateParent)
immediateParent = this;
// Find a most preferred accesskey which should be returned.
nsIFrame* foundMenu = nsnull;
PRUint32 foundIndex = accessKeys.NoIndex;
nsIFrame* currFrame = immediateParent->GetFirstPrincipalChild();
while (currFrame) {
nsIContent* current = currFrame->GetContent();
// See if it's a menu item.
if (nsXULPopupManager::IsValidMenuItem(PresContext(), current, false)) {
// Get the shortcut attribute.
nsAutoString shortcutKey;
current->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, shortcutKey);
if (!shortcutKey.IsEmpty()) {
ToLowerCase(shortcutKey);
const PRUnichar* start = shortcutKey.BeginReading();
const PRUnichar* end = shortcutKey.EndReading();
PRUint32 ch = UTF16CharEnumerator::NextChar(&start, end);
PRUint32 index = accessKeys.IndexOf(ch);
if (index != accessKeys.NoIndex &&
(foundIndex == accessKeys.NoIndex || index < foundIndex)) {
foundMenu = currFrame;
foundIndex = index;
}
}
}
currFrame = currFrame->GetNextSibling();
}
if (foundMenu) {
return (foundMenu->GetType() == nsGkAtoms::menuFrame) ?
static_cast<nsMenuFrame *>(foundMenu) : nsnull;
}
// didn't find a matching menu item
#ifdef XP_WIN
// behavior on Windows - this item is on the menu bar, beep and deactivate the menu bar
if (mIsActive) {
nsCOMPtr<nsISound> soundInterface = do_CreateInstance("@mozilla.org/sound;1");
if (soundInterface)
soundInterface->Beep();
}
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsIFrame* popup = pm->GetTopPopup(ePopupTypeAny);
if (popup)
pm->HidePopup(popup->GetContent(), true, true, true);
}
SetCurrentMenuItem(nsnull);
SetActive(false);
#endif // #ifdef XP_WIN
return nsnull;
}
nsresult
nsMathMLmfracFrame::PlaceInternal(nsRenderingContext& aRenderingContext,
bool aPlaceOrigin,
nsHTMLReflowMetrics& aDesiredSize,
bool aWidthOnly)
{
////////////////////////////////////
// Get the children's desired sizes
nsBoundingMetrics bmNum, bmDen;
nsHTMLReflowMetrics sizeNum;
nsHTMLReflowMetrics sizeDen;
nsIFrame* frameDen = nullptr;
nsIFrame* frameNum = mFrames.FirstChild();
if (frameNum)
frameDen = frameNum->GetNextSibling();
if (!frameNum || !frameDen || frameDen->GetNextSibling()) {
// report an error, encourage people to get their markups in order
if (aPlaceOrigin) {
ReportChildCountError();
}
return ReflowError(aRenderingContext, aDesiredSize);
}
GetReflowAndBoundingMetricsFor(frameNum, sizeNum, bmNum);
GetReflowAndBoundingMetricsFor(frameDen, sizeDen, bmDen);
nsPresContext* presContext = PresContext();
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aRenderingContext.SetFont(fm);
nscoord defaultRuleThickness, axisHeight;
GetRuleThickness(aRenderingContext, fm, defaultRuleThickness);
GetAxisHeight(aRenderingContext, fm, axisHeight);
nsEmbellishData coreData;
GetEmbellishDataFrom(mEmbellishData.coreFrame, coreData);
// see if the linethickness attribute is there
nsAutoString value;
GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::linethickness_,
value);
mLineThickness = CalcLineThickness(presContext, mStyleContext, value,
onePixel, defaultRuleThickness);
// bevelled attribute
GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::bevelled_,
value);
mIsBevelled = value.EqualsLiteral("true");
if (!mIsBevelled) {
mLineRect.height = mLineThickness;
// by default, leave at least one-pixel padding at either end, or use
// lspace & rspace that may come from <mo> if we are an embellished
// container (we fetch values from the core since they may use units that
// depend on style data, and style changes could have occurred in the
// core since our last visit there)
nscoord leftSpace = std::max(onePixel,
NS_MATHML_IS_RTL(mPresentationData.flags) ?
coreData.trailingSpace : coreData.leadingSpace);
nscoord rightSpace = std::max(onePixel,
NS_MATHML_IS_RTL(mPresentationData.flags) ?
coreData.leadingSpace : coreData.trailingSpace);
//////////////////
// Get shifts
nscoord numShift = 0;
nscoord denShift = 0;
// Rule 15b, App. G, TeXbook
nscoord numShift1, numShift2, numShift3;
nscoord denShift1, denShift2;
GetNumeratorShifts(fm, numShift1, numShift2, numShift3);
GetDenominatorShifts(fm, denShift1, denShift2);
if (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags)) {
// C > T
numShift = numShift1;
denShift = denShift1;
}
else {
numShift = (0 < mLineRect.height) ? numShift2 : numShift3;
denShift = denShift2;
}
nscoord minClearance = 0;
nscoord actualClearance = 0;
nscoord actualRuleThickness = mLineThickness;
if (0 == actualRuleThickness) {
// Rule 15c, App. G, TeXbook
// min clearance between numerator and denominator
minClearance = (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags)) ?
7 * defaultRuleThickness : 3 * defaultRuleThickness;
actualClearance =
(numShift - bmNum.descent) - (bmDen.ascent - denShift);
// actualClearance should be >= minClearance
if (actualClearance < minClearance) {
nscoord halfGap = (minClearance - actualClearance)/2;
numShift += halfGap;
denShift += halfGap;
}
}
else {
// Rule 15d, App. G, TeXbook
// min clearance between numerator or denominator and middle of bar
// TeX has a different interpretation of the thickness.
// Try $a \above10pt b$ to see. Here is what TeX does:
// minClearance = (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags)) ?
// 3 * actualRuleThickness : actualRuleThickness;
// we slightly depart from TeX here. We use the defaultRuleThickness instead
// of the value coming from the linethickness attribute, i.e., we recover what
// TeX does if the user hasn't set linethickness. But when the linethickness
// is set, we avoid the wide gap problem.
minClearance = (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags)) ?
3 * defaultRuleThickness : defaultRuleThickness + onePixel;
// adjust numShift to maintain minClearance if needed
actualClearance =
(numShift - bmNum.descent) - (axisHeight + actualRuleThickness/2);
if (actualClearance < minClearance) {
numShift += (minClearance - actualClearance);
}
// adjust denShift to maintain minClearance if needed
actualClearance =
(axisHeight - actualRuleThickness/2) - (bmDen.ascent - denShift);
if (actualClearance < minClearance) {
denShift += (minClearance - actualClearance);
}
}
//////////////////
// Place Children
// XXX Need revisiting the width. TeX uses the exact width
// e.g. in $$\huge\frac{\displaystyle\int}{i}$$
nscoord width = std::max(bmNum.width, bmDen.width);
nscoord dxNum = leftSpace + (width - sizeNum.width)/2;
nscoord dxDen = leftSpace + (width - sizeDen.width)/2;
width += leftSpace + rightSpace;
// see if the numalign attribute is there
GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::numalign_,
value);
if (value.EqualsLiteral("left"))
dxNum = leftSpace;
else if (value.EqualsLiteral("right"))
dxNum = width - rightSpace - sizeNum.width;
// see if the denomalign attribute is there
GetAttribute(mContent, mPresentationData.mstyle, nsGkAtoms::denomalign_,
value);
if (value.EqualsLiteral("left"))
dxDen = leftSpace;
else if (value.EqualsLiteral("right"))
dxDen = width - rightSpace - sizeDen.width;
mBoundingMetrics.rightBearing =
std::max(dxNum + bmNum.rightBearing, dxDen + bmDen.rightBearing);
if (mBoundingMetrics.rightBearing < width - rightSpace)
mBoundingMetrics.rightBearing = width - rightSpace;
mBoundingMetrics.leftBearing =
std::min(dxNum + bmNum.leftBearing, dxDen + bmDen.leftBearing);
if (mBoundingMetrics.leftBearing > leftSpace)
mBoundingMetrics.leftBearing = leftSpace;
mBoundingMetrics.ascent = bmNum.ascent + numShift;
mBoundingMetrics.descent = bmDen.descent + denShift;
mBoundingMetrics.width = width;
aDesiredSize.ascent = sizeNum.ascent + numShift;
aDesiredSize.height = aDesiredSize.ascent +
sizeDen.height - sizeDen.ascent + denShift;
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
if (aPlaceOrigin) {
nscoord dy;
// place numerator
dy = 0;
FinishReflowChild(frameNum, presContext, nullptr, sizeNum, dxNum, dy, 0);
// place denominator
dy = aDesiredSize.height - sizeDen.height;
FinishReflowChild(frameDen, presContext, nullptr, sizeDen, dxDen, dy, 0);
// place the fraction bar - dy is top of bar
dy = aDesiredSize.ascent - (axisHeight + actualRuleThickness/2);
mLineRect.SetRect(leftSpace, dy, width - (leftSpace + rightSpace),
actualRuleThickness);
}
} else {
nscoord numShift = 0.0;
nscoord denShift = 0.0;
nscoord padding = 3 * defaultRuleThickness;
nscoord slashRatio = 3;
// Define the constant used in the expression of the maximum width
nscoord em = fm->EmHeight();
nscoord slashMaxWidthConstant = 2 * em;
// For large line thicknesses the minimum slash height is limited to the
// largest expected height of a fraction
nscoord slashMinHeight = slashRatio *
std::min(2 * mLineThickness, slashMaxWidthConstant);
nscoord leadingSpace = std::max(padding, coreData.leadingSpace);
nscoord trailingSpace = std::max(padding, coreData.trailingSpace);
nscoord delta;
// ___________
// | | /
// {|-NUMERATOR-| /
// {|___________| S
// { L
// numShift{ A
// ------------------------------------------------------- baseline
// S _____________ } denShift
// H | |}
// / |-DENOMINATOR-|}
// / |_____________|
//
// first, ensure that the top of the numerator is at least as high as the
// top of the denominator (and the reverse for the bottoms)
delta = std::max(bmDen.ascent - bmNum.ascent,
bmNum.descent - bmDen.descent) / 2;
if (delta > 0) {
numShift += delta;
denShift += delta;
}
if (NS_MATHML_IS_DISPLAYSTYLE(mPresentationData.flags)) {
delta = std::min(bmDen.ascent + bmDen.descent,
bmNum.ascent + bmNum.descent) / 2;
numShift += delta;
denShift += delta;
} else {
nscoord xHeight = fm->XHeight();
numShift += xHeight / 2;
denShift += xHeight / 4;
}
// Set the ascent/descent of our BoundingMetrics.
mBoundingMetrics.ascent = bmNum.ascent + numShift;
mBoundingMetrics.descent = bmDen.descent + denShift;
// At this point the height of the slash is
// mBoundingMetrics.ascent + mBoundingMetrics.descent
// Ensure that it is greater than slashMinHeight
delta = (slashMinHeight -
(mBoundingMetrics.ascent + mBoundingMetrics.descent)) / 2;
if (delta > 0) {
mBoundingMetrics.ascent += delta;
mBoundingMetrics.descent += delta;
}
// Set the width of the slash
if (aWidthOnly) {
mLineRect.width = mLineThickness + slashMaxWidthConstant;
} else {
mLineRect.width = mLineThickness +
std::min(slashMaxWidthConstant,
(mBoundingMetrics.ascent + mBoundingMetrics.descent) /
slashRatio);
}
// Set horizontal bounding metrics
if (NS_MATHML_IS_RTL(mPresentationData.flags)) {
mBoundingMetrics.leftBearing = trailingSpace + bmDen.leftBearing;
mBoundingMetrics.rightBearing = trailingSpace + bmDen.width + mLineRect.width + bmNum.rightBearing;
} else {
mBoundingMetrics.leftBearing = leadingSpace + bmNum.leftBearing;
mBoundingMetrics.rightBearing = leadingSpace + bmNum.width + mLineRect.width + bmDen.rightBearing;
}
mBoundingMetrics.width =
leadingSpace + bmNum.width + mLineRect.width + bmDen.width +
trailingSpace;
// Set aDesiredSize
aDesiredSize.ascent = mBoundingMetrics.ascent + padding;
aDesiredSize.height =
mBoundingMetrics.ascent + mBoundingMetrics.descent + 2 * padding;
aDesiredSize.width = mBoundingMetrics.width;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
if (aPlaceOrigin) {
nscoord dx, dy;
// place numerator
dx = MirrorIfRTL(aDesiredSize.width, sizeNum.width,
leadingSpace);
dy = aDesiredSize.ascent - numShift - sizeNum.ascent;
FinishReflowChild(frameNum, presContext, nullptr, sizeNum, dx, dy, 0);
// place the fraction bar
dx = MirrorIfRTL(aDesiredSize.width, mLineRect.width,
leadingSpace + bmNum.width);
dy = aDesiredSize.ascent - mBoundingMetrics.ascent;
mLineRect.SetRect(dx, dy,
mLineRect.width, aDesiredSize.height - 2 * padding);
// place denominator
dx = MirrorIfRTL(aDesiredSize.width, sizeDen.width,
leadingSpace + bmNum.width + mLineRect.width);
dy = aDesiredSize.ascent + denShift - sizeDen.ascent;
FinishReflowChild(frameDen, presContext, nullptr, sizeDen, dx, dy, 0);
}
}
return NS_OK;
}