/// <summary>
/// Apply <see cref="Typeface"/> that build from <paramref name="classification"/> using
/// <paramref name="defaultFormatting"/> as fallback values
/// </summary>
private static TextFormattingRunProperties ApplyTypeFace(
TextFormattingRunProperties formatting, Classification classification, TextFormattingRunProperties defaultFormatting)
{
TextFormattingRunProperties ApplyTypeFace(TypeFaces mask, Typeface fallbackFace)
{
if (mask.Is(TypeFaces.Style) && !formatting.ItalicEmpty)
{
formatting = formatting.ClearItalic();
}
return(formatting.SetTypeface(new Typeface(
mask.Is(TypeFaces.Family) ? FontFamilyService.SupportedFamilies[classification.FontFamily] : fallbackFace.FontFamily,
mask.Is(TypeFaces.Style) ? FontStyleService.SupportedStyleByNames[classification.FontStyle] : fallbackFace.Style,
fallbackFace.Weight,
mask.Is(TypeFaces.Stretch) ? FontStretchService.SupportedStretches[classification.FontStretch] : fallbackFace.Stretch)));
}
if (formatting.TypefaceEmpty)
{
var faces = TypeFaces.Family | TypeFaces.Stretch;
switch (classification.FontStyle)
{
case FontStyleService.Italic when !formatting.Italic:
formatting = formatting.SetItalic(true);
break;
case FontStyleService.Normal when formatting.Italic:
formatting = formatting.SetItalic(false);
break;
default:
faces |= TypeFaces.Style;
break;
}
formatting = ApplyTypeFace(faces, defaultFormatting.Typeface);
}
else
{
var typeFace = formatting.Typeface;
if (!typeFace.Style.Equals(FontStyleService.SupportedStyleByNames[classification.FontStyle]) ||
!typeFace.FontFamily.Source.Equals(classification.FontFamily) ||
typeFace.Stretch.ToOpenTypeStretch() != classification.FontStretch)
{
formatting = ApplyTypeFace(TypeFaces.All, typeFace);
}
}
return(formatting);
}
