ICSharpCode.NRefactory.CSharp.Completion.CSharpCompletionEngine.TryGetCompletionWord C# (CSharp) Method

		public bool TryGetCompletionWord(int offset, out int startPos, out int wordLength)
		{
			startPos = wordLength = 0;
			int pos = offset - 1;
			while (pos >= 0) {
				char c = document.GetCharAt(pos);
				if (!char.IsLetterOrDigit(c) && c != '_')
					break;
				pos--;
			}
			if (pos == -1)
				return false;
			
			pos++;
			startPos = pos;
			
			while (pos < document.TextLength) {
				char c = document.GetCharAt(pos);
				if (!char.IsLetterOrDigit(c) && c != '_')
					break;
				pos++;
			}
			wordLength = pos - startPos;
			return true;
		}
		

		bool ShowCompletion(ITextEditor editor, char completionChar, bool ctrlSpace)
		{
			var completionContext = CSharpCompletionContext.Get(editor);
			if (completionContext == null)
				return false;
			
			var completionFactory = new CSharpCompletionDataFactory(completionContext, new CSharpResolver(completionContext.TypeResolveContextAtCaret));
			CSharpCompletionEngine cce = new CSharpCompletionEngine(
				editor.Document,
				completionContext.CompletionContextProvider,
				completionFactory,
				completionContext.ProjectContent,
				completionContext.TypeResolveContextAtCaret
			);
			
			cce.FormattingPolicy = FormattingOptionsFactory.CreateSharpDevelop();
			cce.EolMarker = DocumentUtilities.GetLineTerminator(editor.Document, editor.Caret.Line);
			cce.IndentString = editor.Options.IndentationString;
			
			int startPos, triggerWordLength;
			IEnumerable<ICompletionData> completionData;
			if (ctrlSpace) {
				if (!cce.TryGetCompletionWord(editor.Caret.Offset, out startPos, out triggerWordLength)) {
					startPos = editor.Caret.Offset;
					triggerWordLength = 0;
				}
				completionData = cce.GetCompletionData(startPos, true);
				completionData = completionData.Concat(cce.GetImportCompletionData(startPos));
			} else {
				startPos = editor.Caret.Offset;
				if (char.IsLetterOrDigit (completionChar) || completionChar == '_') {
					if (startPos > 1 && char.IsLetterOrDigit (editor.Document.GetCharAt (startPos - 2)))
						return false;
					completionData = cce.GetCompletionData(startPos, false);
					startPos--;
					triggerWordLength = 1;
				} else {
					completionData = cce.GetCompletionData(startPos, false);
					triggerWordLength = 0;
				}
			}
			
			DefaultCompletionItemList list = new DefaultCompletionItemList();
			list.Items.AddRange(completionData.Cast<ICompletionItem>());
			if (list.Items.Count > 0) {
				list.SortItems();
				list.PreselectionLength = editor.Caret.Offset - startPos;
				list.PostselectionLength = Math.Max(0, startPos + triggerWordLength - editor.Caret.Offset);
				list.SuggestedItem = list.Items.FirstOrDefault(i => i.Text == cce.DefaultCompletionString);
				editor.ShowCompletionWindow(list);
				return true;
			}
			
			if (!ctrlSpace) {
				// Method Insight
				var pce = new CSharpParameterCompletionEngine(
					editor.Document,
					completionContext.CompletionContextProvider,
					completionFactory,
					completionContext.ProjectContent,
					completionContext.TypeResolveContextAtCaret
				);
				var newInsight = pce.GetParameterDataProvider(editor.Caret.Offset, completionChar) as CSharpMethodInsight;
				if (newInsight != null && newInsight.items.Count > 0) {
					newInsight.UpdateHighlightedParameter(pce);
					newInsight.Show();
					return true;
				}
			}
			return false;
		}