/// <summary>
/// Determines whether a given <see cref="RichText"/> instance is <c>null</c> or empty.
/// </summary>
/// <param name="richText">The <see cref="RichText"/> instance to test.</param>
/// <returns><c>true</c> if <paramref name="richText"/> is <c>null</c> or empty.</returns>
/// <remarks>This is a cheaper alternative to <see cref="string.IsNullOrEmpty"/> on a <see cref="RichText"/> instance using implicit string cast.</remarks>
public static bool IsNullOrEmpty(RichText richText)
{
return (richText == null) || richText.IsEmpty();
}
/// <summary>
/// Renders a given <see cref="RichText"/> instance as HTML.
/// </summary>
/// <param name="htmlHelper">The HtmlHelper instance on which the extension method operates.</param>
/// <param name="richText">The <see cref="RichText"/> instance to render. If the rich text contains Entity Models, those will be rendered using applicable Views.</param>
/// <returns>The rendered HTML.</returns>
public static MvcHtmlString DxaRichText(this HtmlHelper htmlHelper, RichText richText)
{
if (richText == null)
{
return MvcHtmlString.Empty;
}
StringBuilder htmlBuilder = new StringBuilder();
foreach (IRichTextFragment richTextFragment in richText.Fragments)
{
EntityModel entityModel = richTextFragment as EntityModel;
string htmlFragment = (entityModel == null) ? richTextFragment.ToHtml() : htmlHelper.DxaEntity(entityModel).ToString();
htmlBuilder.Append(htmlFragment);
}
return new MvcHtmlString(htmlBuilder.ToString());
}
/// <summary>
/// Determines whether a given <see cref="RichText"/> instance is <c>null</c> or empty.
/// </summary>
/// <param name="richText">The <see cref="RichText"/> instance to test.</param>
/// <returns><c>true</c> if <paramref name="richText"/> is <c>null</c> or empty.</returns>
/// <remarks>This is a cheaper alternative to <see cref="string.IsNullOrEmpty"/> on a <see cref="RichText"/> instance using implicit string cast.</remarks>
public static bool IsNullOrEmpty(RichText richText)
{
return((richText == null) || richText.IsEmpty());
}