public static MathListIndex IndexForPoint <TFont, TGlyph>(this FractionDisplay <TFont, TGlyph> self, TypesettingContext <TFont, TGlyph> context, PointF point) where TFont : IFont <TGlyph>
{
// We can be before or after the fraction
if (point.X < self.Position.X - PixelDelta)
{
//We are before the fraction, so
return(MathListIndex.Level0Index(self.Range.Location));
}
else if (point.X > self.Position.X + self.Width + PixelDelta)
{
//We are after the fraction
return(MathListIndex.Level0Index(self.Range.End));
}
if (point.Y > self.LinePosition + PixelDelta)
{
return(MathListIndex.IndexAtLocation(self.Range.Location, MathListSubIndexType.Numerator, self.Numerator.IndexForPoint(context, point)));
}
else if (point.Y < self.LinePosition - PixelDelta)
{
return(MathListIndex.IndexAtLocation(self.Range.Location, MathListSubIndexType.Denominator, self.Denominator.IndexForPoint(context, point)));
}
if (point.X > self.Position.X + self.Width / 2)
{
return(MathListIndex.Level0Index(self.Range.End));
}
return(MathListIndex.Level0Index(self.Range.Location));
}
public static MathListIndex IndexForPoint <TFont, TGlyph>(this FractionDisplay <TFont, TGlyph> self, TypesettingContext <TFont, TGlyph> context, PointF point) where TFont : IFont <TGlyph>
{
// We can be before or after the fraction
if (point.X < self.Position.X - PixelDelta)
{
//We are before the fraction, so
return(MathListIndex.Level0Index(self.Range.Location));
}
else if (point.X > self.Position.X + self.Width + PixelDelta)
{
//We are after the fraction
return(MathListIndex.Level0Index(self.Range.End));
}
//We can be either near the numerator or denominator
var numeratorDistance = DistanceFromPointToRect(point, self.Numerator.DisplayBounds);
var denominatorDistance = DistanceFromPointToRect(point, self.Denominator.DisplayBounds);
if (numeratorDistance < denominatorDistance)
{
return(MathListIndex.IndexAtLocation(self.Range.Location, self.Numerator.IndexForPoint(context, point), MathListSubIndexType.Numerator));
}
else
{
return(MathListIndex.IndexAtLocation(self.Range.Location, self.Denominator.IndexForPoint(context, point), MathListSubIndexType.Denominator));
}
}
public static void HighlightCharacterAt <TFont, TGlyph>(this FractionDisplay <TFont, TGlyph> self, MathListIndex index, Color color) where TFont : IFont <TGlyph>
{
if (index.SubIndexType != MathListSubIndexType.None)
{
throw Arg("The subindex must be none to get the highlight a character in it.", nameof(index));
}
self.Highlight(color);
}
public static PointF?PointForIndex <TFont, TGlyph>(this FractionDisplay <TFont, TGlyph> self, TypesettingContext <TFont, TGlyph> context, MathListIndex index) where TFont : IFont <TGlyph>
{
if (index.SubIndexType != MathListSubIndexType.None)
{
throw Arg("The subindex must be none to get the closest point for it.", nameof(index));
}
// draw a caret after the fraction
return(new PointF(self.DisplayBounds.Right, self.Position.Y));
}
public static PointF?PointForIndex <TFont, TGlyph>(
this FractionDisplay <TFont, TGlyph> self,
TypesettingContext <TFont, TGlyph> _,
MathListIndex index) where TFont : IFont <TGlyph> =>
index.SubIndexType != MathListSubIndexType.None
? throw new ArgumentException
("The subindex must be none to get the closest point for it.", nameof(index))
: index.AtomIndex == self.Range.End
// draw a caret after the fraction
? self.Position.Plus(new PointF(self.DisplayBounds().Right, 0))
// draw a caret before the fraction
: self.Position;
public static ListDisplay <TFont, TGlyph> SubListForIndexType <TFont, TGlyph>(this FractionDisplay <TFont, TGlyph> self, MathListSubIndexType type) where TFont : IFont <TGlyph>
{
switch (type)
{
case MathListSubIndexType.Numerator:
return(self.Numerator);
case MathListSubIndexType.Denominator:
return(self.Denominator);
default:
throw ArgOutOfRange("Subindex type is not a fraction subtype.", type, nameof(type));
}
}
public static void Highlight <TFont, TGlyph>(this FractionDisplay <TFont, TGlyph> self, Color color) where TFont : IFont <TGlyph>
{
self.Numerator.Highlight(color);
self.Denominator.Highlight(color);
}
