void SetNewDocument()
{
cachedTextColorsCollection = new CachedTextColorsCollection();
wpfTextView.TextBuffer.Replace(new Span(0, wpfTextView.TextBuffer.CurrentSnapshot.Length), string.Empty);
ClearUndoRedoHistory();
cachedColorsList.Clear();
cachedColorsList.Add(0, cachedTextColorsCollection);
}
public bool SetContent(DocumentViewerContent content, IContentType contentType)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
if (contentType == null)
{
contentType = defaultContentType;
}
HideCancelButton();
var newContent = new CurrentContent(content, contentType);
if (currentContent.Equals(newContent))
{
return(false);
}
currentContent = newContent;
spanReferenceCollection = newContent.Content.GetCustomData <SpanDataCollection <ReferenceAndId> >(DocumentViewerContentDataIds.SpanReference) ?? SpanDataCollection <ReferenceAndId> .Empty;
TextView.TextBuffer.ChangeContentType(contentType, null);
cachedColorsList.Clear();
cachedColorsList.Add(0, content.ColorCollection);
// If it's the same text, don't update text buffer and caret. It can be the same text if
// it's not been cached, eg. it's the resources or some other content with UI content.
// This simulates the cached code path above which also doesn't move the caret. And as
// an added bonus, it will use less memory and CPU.
bool sameText = IsSameTextAsCurrentSnapshot(TextView.TextSnapshot, content.Text);
if (!sameText)
{
TextView.TextBuffer.Replace(new Span(0, TextView.TextBuffer.CurrentSnapshot.Length), content.Text);
TextView.Caret.MoveTo(new SnapshotPoint(TextView.TextSnapshot, 0));
TextView.Caret.EnsureVisible();
TextView.Selection.Clear();
}
return(true);
}