protected override Box CreateBoxCore(TexEnvironment environment)
{
var texFont = environment.MathFont;
var style = environment.Style;
// Create box for base atom.
var baseBox = this.BaseAtom.CreateBox(environment);
// Create result box.
var resultBox = new HorizontalBox();
var axis = texFont.GetAxisHeight(style);
var delta = Math.Max(baseBox.Height - axis, baseBox.Depth + axis);
var minHeight = Math.Max((delta / 500) * delimeterFactor, 2 * delta - delimeterShortfall);
// Create and add box for left delimeter.
if (this.LeftDelimeter != null && this.LeftDelimeter.Name != SymbolAtom.EmptyDelimiterName)
{
var leftDelimeterBox = DelimiterFactory.CreateBox(this.LeftDelimeter.Name, minHeight, environment);
leftDelimeterBox.Source = this.LeftDelimeter.Source;
CentreBox(leftDelimeterBox, axis);
resultBox.Add(leftDelimeterBox);
}
// add glueElement between left delimeter and base Atom, unless base Atom is whitespace.
if (!(this.BaseAtom is SpaceAtom))
{
resultBox.Add(Glue.CreateBox(TexAtomType.Opening, this.BaseAtom.GetLeftType(), environment));
}
// add box for base Atom.
resultBox.Add(baseBox);
// add glueElement between right delimeter and base Atom, unless base Atom is whitespace.
if (!(this.BaseAtom is SpaceAtom))
{
resultBox.Add(Glue.CreateBox(this.BaseAtom.GetRightType(), TexAtomType.Closing, environment));
}
// Create and add box for right delimeter.
if (this.RightDelimeter != null && this.RightDelimeter.Name != SymbolAtom.EmptyDelimiterName)
{
var rightDelimeterBox = DelimiterFactory.CreateBox(this.RightDelimeter.Name, minHeight, environment);
rightDelimeterBox.Source = this.RightDelimeter.Source;
CentreBox(rightDelimeterBox, axis);
resultBox.Add(rightDelimeterBox);
}
return(resultBox);
}
protected override Box CreateBoxCore(TexEnvironment environment)
{
// Create result box.
var resultBox = new HorizontalBox(environment.Foreground, environment.Background);
var previousAtom = this.PreviousAtom;
// Create and add box for each atom in row.
for (int i = 0; i < this.Elements.Count; i++)
{
var curAtom = new DummyAtom(this.Elements[i]);
// Change atom type to Ordinary, if required.
var hasNextAtom = i < this.Elements.Count - 1;
var nextAtom = hasNextAtom ? (Atom)this.Elements[i + 1] : null;
curAtom = ChangeAtomToOrdinary(curAtom, previousAtom, nextAtom);
// Check if atom is part of ligature or should be kerned.
var kern = 0d;
if (hasNextAtom && curAtom.GetRightType() == TexAtomType.Ordinary && curAtom.Atom is CharSymbol cs)
{
if (nextAtom is CharSymbol ns && ligatureKernChangeSet[(int)nextAtom.GetLeftType()])
{
var font = ns.GetStyledFont(environment);
var style = environment.Style;
curAtom = curAtom.AsTextSymbol();
if (font.SupportsMetrics && cs.IsSupportedByFont(font, style))
{
var leftAtomCharFont = curAtom.GetCharFont(font).Value;
var rightAtomCharFont = ns.GetCharFont(font).Value;
var ligatureCharFont = font.GetLigature(leftAtomCharFont, rightAtomCharFont);
if (ligatureCharFont == null)
{
// Atom should be kerned.
kern = font.GetKern(leftAtomCharFont, rightAtomCharFont, style);
}
else
{
// Atom is part of ligature.
curAtom = DummyAtom.CreateLigature(new FixedCharAtom(null, ligatureCharFont));
i++;
}
}
}
}
// Create and add glue box, unless atom is first of row or previous/current atom is kern.
if (i != 0 && previousAtom != null && !previousAtom.IsKern && !curAtom.IsKern)
{
resultBox.Add(Glue.CreateBox(previousAtom.GetRightType(), curAtom.GetLeftType(), environment));
}
// Create and add box for atom.
var curBox = curAtom.WithPreviousAtom(previousAtom).CreateBox(environment);
resultBox.Add(curBox);
environment.LastFontId = curBox.GetLastFontId();
// Insert kern, if required.
if (kern > TexUtilities.FloatPrecision)
{
resultBox.Add(new StrutBox(0, kern, 0, 0));
}
if (!curAtom.IsKern)
{
previousAtom = curAtom;
}
}
return(resultBox);
}
