/// <summary>
/// Creates a RichText instance with the given text and RichTextModel.
/// </summary>
/// <param name="text">
/// The text to use in this RichText instance.
/// </param>
/// <param name="model">
/// The model that contains the formatting to use for this RichText instance.
/// <c>model.DocumentLength</c> should correspond to <c>text.Length</c>.
/// This parameter may be null, in which case the RichText instance just holds plain text.
/// </param>
public RichText(string text, RichTextModel model = null)
{
if (text == null)
{
throw new ArgumentNullException("text");
}
this.text = text;
if (model != null)
{
var sections = model.GetHighlightedSections(0, text.Length).ToArray();
stateChangeOffsets = new int[sections.Length];
stateChanges = new HighlightingColor[sections.Length];
for (int i = 0; i < sections.Length; i++)
{
stateChangeOffsets[i] = sections[i].Offset;
stateChanges[i] = sections[i].Color;
}
}
else
{
stateChangeOffsets = new int[] { 0 };
stateChanges = new HighlightingColor[] { HighlightingColor.Empty };
}
}