internal static FlowDirection ToFlowDirection(this EffectiveFlowDirection self)
{
if (self.IsLeftToRight())
{
return(FlowDirection.LeftToRight);
}
else
{
return(FlowDirection.RightToLeft);
}
throw new InvalidOperationException($"Cannot convert {self} to {nameof(FlowDirection)}.");
}
internal static NSTextAlignment ToNativeTextAlignment(this TextAlignment alignment, EffectiveFlowDirection flowDirection)
{
var isLtr = flowDirection.IsLeftToRight();
switch (alignment)
{
case TextAlignment.Center:
return(NSTextAlignment.Center);
case TextAlignment.End:
if (isLtr)
{
return(NSTextAlignment.Right);
}
else
{
return(NSTextAlignment.Left);
}
default:
if (isLtr)
{
return(NSTextAlignment.Left);
}
else
{
return(NSTextAlignment.Natural);
}
}
}
internal static Windows.UI.Xaml.TextAlignment ToNativeTextAlignment(this TextAlignment alignment, EffectiveFlowDirection flowDirection = default(EffectiveFlowDirection))
{
var isLtr = flowDirection.IsLeftToRight();
switch (alignment)
{
case TextAlignment.Center:
return(Windows.UI.Xaml.TextAlignment.Center);
case TextAlignment.End:
if (isLtr)
{
return(Windows.UI.Xaml.TextAlignment.Right);
}
else
{
return(Windows.UI.Xaml.TextAlignment.Left);
}
default:
if (isLtr)
{
return(Windows.UI.Xaml.TextAlignment.Left);
}
else
{
return(Windows.UI.Xaml.TextAlignment.Right);
}
}
}
public static bool IsExplicit(this EffectiveFlowDirection self)
{
return((self & EffectiveFlowDirection.Explicit) == EffectiveFlowDirection.Explicit);
}
public static bool IsLeftToRight(this EffectiveFlowDirection self)
{
return((self & EffectiveFlowDirection.RightToLeft) != EffectiveFlowDirection.RightToLeft);
}
