/// <summary>Begin a span of text in the specified <paramref name="style" /> .</summary>
/// <param name="output">Output destination.</param>
/// <param name="style">Style to apply.</param>
private void Set(RichTextBox output, RichTextThemeStyle style)
{
if (output is null)
{
throw new ArgumentNullException(nameof(output));
}
if (!this.styles.TryGetValue(style, out var wcts))
{
return;
}
if (wcts.Foreground.HasValue)
{
output.SelectionColor = wcts.Foreground.Value;
}
if (wcts.Background.HasValue)
{
output.SelectionBackColor = wcts.Background.Value;
}
}
internal StyleReset Apply(RichTextBox output, RichTextThemeStyle style)
{
this.Set(output, style);
return(new StyleReset(output));
}
