C# ITextBuffer.CreateSnapshot方法代码示例

		public ReadOnlyDocument(ITextBuffer textBuffer)
		{
			// ensure that underlying buffer is immutable
			this.textBuffer = textBuffer.CreateSnapshot();
			List<int> lines = new List<int>();
			lines.Add(0);
			int offset = 0;
			string newlineType;
			var textSource = DocumentUtilitites.GetTextSource(this.textBuffer);
			while ((offset = ICSharpCode.AvalonEdit.Document.TextUtilities.FindNextNewLine(textSource, offset, out newlineType)) >= 0) {
				offset += newlineType.Length;
				lines.Add(offset);
			}
			this.lines = lines.ToArray();
		}

		/// <summary>
		/// Begins an asynchronous reparse.
		/// This method is thread-safe.
		/// </summary>
		/// <returns>
		/// Returns a task that will make the parse result available.
		/// </returns>
		/// <remarks>
		/// EnqueueForParsing has been renamed to BeginParse and now provides a future (Task&lt;ParseInformation&gt;)
		/// to allow waiting for the result. However, to avoid deadlocks, this should not be done by any
		/// thread the parser might be waiting for  (especially the main thread).
		/// 
		/// Unlike BeginParse().Wait(), ParseFile() is safe to call from the main thread.
		/// </remarks>
		public static Task<ParseInformation> BeginParse(string fileName, ITextBuffer fileContent)
		{
			if (fileContent == null)
				throw new ArgumentNullException("fileContent");
			// create snapshot (in case someone passes a mutable document to BeginParse)
			return GetFileEntry(fileName, true).BeginParse(fileContent.CreateSnapshot());
		}