public static MathListIndex IndexForPoint <TFont, TGlyph>(this RadicalDisplay <TFont, TGlyph> self, TypesettingContext <TFont, TGlyph> context, PointF point) where TFont : IFont <TGlyph>
{
// We can be before or after the radical
if (point.X < self.Position.X - PixelDelta)
{
//We are before the radical, so
return(MathListIndex.Level0Index(self.Range.Location));
}
else if (point.X > self.Position.X + self.Width + PixelDelta)
{
//We are after the radical
return(MathListIndex.Level0Index(self.Range.End));
}
//We can be either near the degree or the radicand
var degreeRect = self.Degree != null ? new RectangleF(self.Degree.Position, self.Degree.DisplayBounds.Size) : default;
var radicandRect = new RectangleF(self.Radicand.Position, self.Radicand.DisplayBounds.Size);
var degreeDistance = DistanceFromPointToRect(point, degreeRect);
var radicandDistance = DistanceFromPointToRect(point, radicandRect);
if (degreeDistance < radicandDistance)
{
if (self.Degree != null)
{
return(MathListIndex.IndexAtLocation(self.Range.Location, MathListSubIndexType.Degree, self.Degree.IndexForPoint(context, point)));
}
return(MathListIndex.Level0Index(self.Range.Location));
}
else
{
return(MathListIndex.IndexAtLocation(self.Range.Location, MathListSubIndexType.Radicand, self.Radicand.IndexForPoint(context, point)));
}
}
public static void Highlight <TFont, TGlyph>(
this RadicalDisplay <TFont, TGlyph> self,
Color color) where TFont : IFont <TGlyph>
{
self.Degree?.Highlight(color);
self.Radicand.Highlight(color);
}
public static MathListIndex IndexForPoint <TFont, TGlyph>(this RadicalDisplay <TFont, TGlyph> self, TypesettingContext <TFont, TGlyph> context, PointF point) where TFont : IFont <TGlyph>
{
// We can be before or after the radical
if (point.X < self.Position.X - PixelDelta)
{
//We are before the radical, so
return(MathListIndex.Level0Index(self.Range.Location));
}
else if (point.X > self.Position.X + self.Width + PixelDelta)
{
//We are after the radical
return(MathListIndex.Level0Index(self.Range.End));
}
//We can be either near the degree or the radicand
var degreeDistance = DistanceFromPointToRect(point, self.Degree?.DisplayBounds ?? default);
var radicandDistance = DistanceFromPointToRect(point, self.Radicand.DisplayBounds);
if (degreeDistance < radicandDistance)
{
return(MathListIndex.IndexAtLocation(self.Range.Location, self.Degree.IndexForPoint(context, point), MathListSubIndexType.Numerator));
}
else
{
return(MathListIndex.IndexAtLocation(self.Range.Location, self.Radicand.IndexForPoint(context, point), MathListSubIndexType.Denominator));
}
}
public static void HighlightCharacterAt <TFont, TGlyph>(this RadicalDisplay <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 RadicalDisplay <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 radical
return(new PointF(self.DisplayBounds.Right, self.Position.Y));
}
public static MathListIndex IndexForPoint <TFont, TGlyph>(
this RadicalDisplay <TFont, TGlyph> self,
TypesettingContext <TFont, TGlyph> context,
PointF point) where TFont : IFont <TGlyph> =>
// We can be before or after the radical
point.X <self.Position.X - PixelDelta
//We are before the radical, so
?MathListIndex.Level0Index(self.Range.Location)
: point.X> self.Position.X + self.Width + PixelDelta
//We are after the radical
? MathListIndex.Level0Index(self.Range.End)
//We can be either near the degree or the radicand
: DistanceFromPointToRect(point, self.Degree != null ? new RectangleF(self.Degree.Position, self.Degree.DisplayBounds().Size) : default)
< DistanceFromPointToRect(point, new RectangleF(self.Radicand.Position, self.Radicand.DisplayBounds().Size))
? self.Degree != null
? MathListIndex.IndexAtLocation(self.Range.Location, MathListSubIndexType.Degree, self.Degree.IndexForPoint(context, point))
: MathListIndex.Level0Index(self.Range.Location)
: MathListIndex.IndexAtLocation(self.Range.Location, MathListSubIndexType.Radicand, self.Radicand.IndexForPoint(context, point));
public static PointF?PointForIndex <TFont, TGlyph>(
this RadicalDisplay <TFont, TGlyph> self,
TypesettingContext <TFont, TGlyph> _,
MathListIndex index) where TFont : IFont <TGlyph>
{
if (index.SubIndexType != MathListSubIndexType.None)
{
throw new ArgumentException("The subindex must be none to get the closest point for it.", nameof(index));
}
if (index.AtomIndex == self.Range.End)
{
// draw a caret after the radical
return(self.Position.Plus(new PointF(self.DisplayBounds().Right, 0)));
}
// draw a caret before the radical
return(self.Position);
}
public static ListDisplay <TFont, TGlyph> SubListForIndexType <TFont, TGlyph>(this RadicalDisplay <TFont, TGlyph> self, MathListSubIndexType type) where TFont : IFont <TGlyph>
{
switch (type)
{
case MathListSubIndexType.Radicand:
return(self.Radicand);
case MathListSubIndexType.Degree:
return(self.Degree);
default:
throw ArgOutOfRange("Subindex type is not a radical subtype.", type, nameof(type));
}
}
public static void Highlight <TFont, TGlyph>(this RadicalDisplay <TFont, TGlyph> self, Color color) where TFont : IFont <TGlyph>
{
#warning Is including Degree intended? It is not present in iosMath
self.Degree.Highlight(color);
self.Radicand.Highlight(color);
}
