/// <summary>
/// Creates a new RichTextColorizer instance.
/// </summary>
public RichTextColorizer(RichTextModel richTextModel)
{
if (richTextModel == null)
{
throw new ArgumentNullException("richTextModel");
}
this.richTextModel = richTextModel;
}
/// <summary>
/// Creates a new RichTextModelWriter that inserts into document, starting at insertionOffset.
/// </summary>
public RichTextModelWriter(RichTextModel richTextModel, IDocument document, int insertionOffset)
: base(new DocumentTextWriter(document, insertionOffset))
{
if (richTextModel == null)
{
throw new ArgumentNullException("richTextModel");
}
this.richTextModel = richTextModel;
this.documentTextWriter = (DocumentTextWriter)base.textWriter;
currentColor = richTextModel.GetHighlightingAt(Math.Max(0, insertionOffset - 1));
}
/// <summary>
/// Creates a <see cref="RichTextModel"/> that stores the highlighting of this line.
/// </summary>
public RichTextModel ToRichTextModel()
{
var builder = new RichTextModel();
int startOffset = DocumentLine.Offset;
foreach (HighlightedSection section in Sections)
{
builder.ApplyHighlighting(section.Offset - startOffset, section.Length, section.Color);
}
return(builder);
}
/// <summary>
/// Creates a substring of this rich text.
/// </summary>
public RichText Substring(int offset, int length)
{
if (offset == 0 && length == this.Length)
{
return(this);
}
string newText = text.Substring(offset, length);
RichTextModel model = ToRichTextModel();
OffsetChangeMap map = new OffsetChangeMap(2);
map.Add(new OffsetChangeMapEntry(offset + length, text.Length - offset - length, 0));
map.Add(new OffsetChangeMapEntry(0, offset, 0));
model.UpdateOffsets(map);
return(new RichText(newText, model));
}
/// <summary>
/// Concatenates the specified rich texts.
/// </summary>
public static RichText Concat(params RichText[] texts)
{
if (texts == null || texts.Length == 0)
{
return(Empty);
}
else if (texts.Length == 1)
{
return(texts[0]);
}
string newText = string.Concat(texts.Select(txt => txt.text));
RichTextModel model = texts[0].ToRichTextModel();
int offset = texts[0].Length;
for (int i = 1; i < texts.Length; i++)
{
model.Append(offset, texts[i].stateChangeOffsets, texts[i].stateChanges);
offset += texts[i].Length;
}
return(new RichText(newText, model));
}
/// <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 };
}
}
