C# TextEditor.CreateFoldSegment方法代码示例

		public static IFoldSegment CreateFoldSegment (TextEditor editor, int offset, int length, bool isCollapsed = false, string collapsedText = "...", FoldingType foldingType = FoldingType.Unknown)
		{
			if (editor == null)
				throw new ArgumentNullException ("editor");
			var result =  editor.CreateFoldSegment (offset, length, isCollapsed);
			result.CollapsedText = collapsedText;
			result.FoldingType = foldingType;
			return result;
		}

		internal static async Task UpdateFoldings (TextEditor Editor, ParsedDocument parsedDocument, DocumentLocation caretLocation, bool firstTime = false, CancellationToken token = default (CancellationToken))
		{
			if (parsedDocument == null || !Editor.Options.ShowFoldMargin)
				return;
			// don't update parsed documents that contain errors - the foldings from there may be invalid.
			if (parsedDocument.HasErrors)
				return;

			try {
				var foldSegments = new List<IFoldSegment> ();

				foreach (FoldingRegion region in await parsedDocument.GetFoldingsAsync (token)) {
					if (token.IsCancellationRequested)
						return;
					var type = FoldingType.Unknown;
					bool setFolded = false;
					bool folded = false;
					//decide whether the regions should be folded by default
					switch (region.Type) {
					case FoldType.Member:
						type = FoldingType.TypeMember;
						break;
					case FoldType.Type:
						type = FoldingType.TypeDefinition;
						break;
					case FoldType.UserRegion:
						type = FoldingType.Region;
						setFolded = DefaultSourceEditorOptions.Instance.DefaultRegionsFolding;
						folded = true;
						break;
					case FoldType.Comment:
						type = FoldingType.Comment;
						setFolded = DefaultSourceEditorOptions.Instance.DefaultCommentFolding;
						folded = true;
						break;
					case FoldType.CommentInsideMember:
						type = FoldingType.Comment;
						setFolded = DefaultSourceEditorOptions.Instance.DefaultCommentFolding;
						folded = false;
						break;
					case FoldType.Undefined:
						setFolded = true;
						folded = region.IsFoldedByDefault;
						break;
					}
					var start = Editor.LocationToOffset (region.Region.Begin);
					var end = Editor.LocationToOffset (region.Region.End);
					var marker = Editor.CreateFoldSegment (start, end - start);
					foldSegments.Add (marker);
					marker.CollapsedText = region.Name;
					marker.FoldingType = type;
					//and, if necessary, set its fold state
					if (marker != null && setFolded && firstTime) {
						// only fold on document open, later added folds are NOT folded by default.
						marker.IsCollapsed = folded;
						continue;
					}
					if (marker != null && region.Region.Contains (caretLocation.Line, caretLocation.Column))
						marker.IsCollapsed = false;
				}
				if (firstTime) {
					Editor.SetFoldings (foldSegments);
				} else {
					Application.Invoke (delegate {
						if (!token.IsCancellationRequested)
							Editor.SetFoldings (foldSegments);
					});
				}
			} catch (Exception ex) {
				LoggingService.LogError ("Unhandled exception in ParseInformationUpdaterWorkerThread", ex);
			}
		}