internal static Typeface?InternalFontFamilyToTypeFace(FontFamily?fontFamily, FontWeight fontWeight, TypefaceStyle style)
{
if (fontFamily?.Source == null || fontFamily.Equals(FontFamily.Default))
{
fontFamily = GetDefaultFontFamily(fontWeight);
}
Typeface?typeface;
try
{
if (typeof(FontHelper).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
{
typeof(FontHelper).Log().Debug($"Searching for font [{fontFamily.Source}]");
}
// If there's a ".", we assume there's an extension and that it's a font file path.
if (fontFamily.Source.Contains("."))
{
var source = fontFamily.Source;
// The lookup is always performed in the assets folder, even if its required to specify it
// with UWP.
source = source.TrimStart("ms-appx://", StringComparison.OrdinalIgnoreCase);
source = source.TrimStart("/assets/", StringComparison.OrdinalIgnoreCase);
source = FontFamilyHelper.RemoveHashFamilyName(source);
if (typeof(FontHelper).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
{
typeof(FontHelper).Log().Debug($"Searching for font as asset [{source}]");
}
// We need to lookup assets manually, as assets are stored this way by android, but windows
// is case insensitive.
string actualAsset = AssetsHelper.FindAssetFile(source);
if (actualAsset != null)
{
typeface = Android.Graphics.Typeface.CreateFromAsset(Android.App.Application.Context.Assets, actualAsset);
if (style != typeface?.Style)
{
typeface = Typeface.Create(typeface, style);
}
}
else
{
throw new InvalidOperationException($"Unable to find [{fontFamily.Source}] from the application's assets.");
}
}
else
{
typeface = Android.Graphics.Typeface.Create(fontFamily.Source, style);
}
return(typeface);
}
catch (Exception e)
{
if (typeof(FontHelper).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Error))
{
typeof(FontHelper).Log().Error("Unable to find font", e);
if (typeof(FontHelper).Log().IsEnabled(LogLevel.Warning))
{
if (!_assetsListed)
{
_assetsListed = true;
var allAssets = AssetsHelper.AllAssets.JoinBy("\r\n");
typeof(FontHelper).Log().Warn($"List of available assets: {allAssets}");
}
}
}
return(null);
}
}