public override void SetAppearance(BottomNavigationView bottomView, IShellAppearanceElement appearance)
{
base.SetAppearance(bottomView, appearance);
if (Build.VERSION.SdkInt < BuildVersionCodes.P)
{
return;
}
TypefaceSpan typefaceSpan = new TypefaceSpan(CustomShellRenderer.BottomTabTitleTypeface);
for (int i = 0; i < bottomView.Menu.Size(); i++)
{
var menuItem = bottomView.Menu.GetItem(i);
if (menuItem.TitleFormatted == null)
{
return;
}
SpannableStringBuilder spannableTitle = new SpannableStringBuilder(menuItem.TitleFormatted);
spannableTitle.SetSpan(typefaceSpan, 0, spannableTitle.Length(), 0);
menuItem.SetTitle(spannableTitle);
}
}
private static void HandleFormatRun(ISpannable spannableString, IAttributedTextRun run)
{
var attributes = run.Attributes;
var start = run.Start;
var end = start + run.Length;
var fontName = attributes.GetFontName();
if (fontName != null)
{
var typefaceSpan = new TypefaceSpan(fontName);
spannableString.SetSpan(typefaceSpan, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetBold() && attributes.GetItalic())
{
var span = new StyleSpan(TypefaceStyle.BoldItalic);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
else if (attributes.GetBold())
{
var span = new StyleSpan(TypefaceStyle.Bold);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
else if (attributes.GetItalic())
{
var span = new StyleSpan(TypefaceStyle.Italic);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetUnderline())
{
var span = new UnderlineSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
var foregroundColor = attributes.GetForegroundColor()?.ParseAsInts()?.ToColor();
if (foregroundColor != null)
{
var span = new ForegroundColorSpan((global::Android.Graphics.Color)foregroundColor);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
var backgroundColor = attributes.GetBackgroundColor()?.ParseAsInts()?.ToColor();
if (backgroundColor != null)
{
var span = new BackgroundColorSpan((global::Android.Graphics.Color)backgroundColor);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetSubscript())
{
var span = new SubscriptSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetSuperscript())
{
var span = new SuperscriptSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetStrikethrough())
{
var span = new StrikethroughSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetUnorderedList())
{
var bulletSpan = new BulletSpan();
spannableString.SetSpan(bulletSpan, start, end, SpanTypes.ExclusiveExclusive);
}
}
