C# TextEditorData.LocationToOffset方法代码示例

		public static List<InsertionPoint> GetInsertionPoints (TextEditorData data, ParsedDocument parsedDocument, IUnresolvedTypeDefinition type)
		{
			if (data == null)
				throw new ArgumentNullException ("data");
			if (parsedDocument == null)
				throw new ArgumentNullException ("parsedDocument");
			if (type == null)
				throw new ArgumentNullException ("type");
			
			// update type from parsed document, since this is always newer.
			//type = parsedDocument.GetInnermostTypeDefinition (type.GetLocation ()) ?? type;
			List<InsertionPoint> result = new List<InsertionPoint> ();
			int offset = data.LocationToOffset (type.Region.Begin);
			if (offset < 0 || type.BodyRegion.IsEmpty)
				return result;
			while (offset < data.Length && data.GetCharAt (offset) != '{') {
				offset++;
			}
			var realStartLocation = data.OffsetToLocation (offset);
			result.Add (GetInsertionPosition (data.Document, realStartLocation.Line, realStartLocation.Column));
			result [0].LineBefore = NewLineInsertion.None;
			
			foreach (var member in type.Members) {
				TextLocation domLocation = member.BodyRegion.End;
				if (domLocation.Line <= 0) {
					DocumentLine lineSegment = data.GetLine (member.Region.BeginLine);
					if (lineSegment == null)
						continue;
					domLocation = new TextLocation (member.Region.BeginLine, lineSegment.Length + 1);
				}
				result.Add (GetInsertionPosition (data.Document, domLocation.Line, domLocation.Column));
			}

			foreach (var nestedType in type.NestedTypes) {
				TextLocation domLocation = nestedType.BodyRegion.End;
				if (domLocation.Line <= 0) {
					DocumentLine lineSegment = data.GetLine (nestedType.Region.BeginLine);
					if (lineSegment == null)
						continue;
					domLocation = new TextLocation (nestedType.Region.BeginLine, lineSegment.Length + 1);
				}
				result.Add (GetInsertionPosition (data.Document, domLocation.Line, domLocation.Column));
			}

			result [result.Count - 1].LineAfter = NewLineInsertion.None;
			CheckStartPoint (data.Document, result [0], result.Count == 1);
			if (result.Count > 1) {
				result.RemoveAt (result.Count - 1); 
				NewLineInsertion insertLine;
				var lineBefore = data.GetLine (type.BodyRegion.EndLine - 1);
				if (lineBefore != null && lineBefore.Length == lineBefore.GetIndentation (data.Document).Length) {
					insertLine = NewLineInsertion.None;
				} else {
					insertLine = NewLineInsertion.Eol;
				}
				// search for line start
				int col = type.BodyRegion.EndColumn - 1;
				var line = data.GetLine (type.BodyRegion.EndLine);
				if (line != null) {
					while (col > 1 && char.IsWhiteSpace (data.GetCharAt (line.Offset + col - 2)))
						col--;
				}
				result.Add (new InsertionPoint (new DocumentLocation (type.BodyRegion.EndLine, col), insertLine, NewLineInsertion.Eol));
				CheckEndPoint (data.Document, result [result.Count - 1], result.Count == 1);
			}
			
			foreach (var region in parsedDocument.UserRegions.Where (r => type.BodyRegion.IsInside (r.Region.Begin))) {
				result.Add (new InsertionPoint (new DocumentLocation (region.Region.BeginLine + 1, 1), NewLineInsertion.Eol, NewLineInsertion.Eol));
				result.Add (new InsertionPoint (new DocumentLocation (region.Region.EndLine, 1), NewLineInsertion.Eol, NewLineInsertion.Eol));
				result.Add (new InsertionPoint (new DocumentLocation (region.Region.EndLine + 1, 1), NewLineInsertion.Eol, NewLineInsertion.Eol));
			}
			result.Sort ((left, right) => left.Location.CompareTo (right.Location));
			return result;
		}

        private InsertionPoint GetInsertionPoint(MonoDevelop.Ide.Gui.Document document, IType type)
        {
            data = document.Editor;
            if (data == null) {
                throw new System.ArgumentNullException ("data");
            }
            var parsedDocument = document.ParsedDocument;
            if (parsedDocument == null) {
                throw new System.ArgumentNullException ("parsedDocument");
            }
            if (type == null) {
                throw new System.ArgumentNullException ("type");
            }
            type = (parsedDocument.CompilationUnit.GetTypeAt (type.Location) ?? type);
            DomRegion domRegion = type.BodyRegion;
            var start = type.BodyRegion.Start.Line;
            indent = data.GetLine(start).GetIndentation(data.Document);
            DomLocation domLocation = domRegion.End;
            int num = data.LocationToOffset (domLocation.Line, 1);
            while (num < data.Length && data.GetCharAt(num) != '}') {
                num++;
            }
            num++;
            DocumentLocation documentLocation = data.OffsetToLocation (num);

            LineSegment lineAfterClassEnd = data.GetLine (domLocation.Line + 1);
            NewLineInsertion lineAfter;
            if (lineAfterClassEnd != null && lineAfterClassEnd.EditableLength == lineAfterClassEnd.GetIndentation (data.Document).Length)
                lineAfter = NewLineInsertion.BlankLine;
            else
                lineAfter = NewLineInsertion.None;

            return new InsertionPoint (documentLocation, NewLineInsertion.None, lineAfter);
        }

		public static void Down (TextEditorData data)
		{
			//on Mac, when deselecting and moving up/down a line, column is always the column of the selection's start
			if (Platform.IsMac && data.IsSomethingSelected && !data.Caret.PreserveSelection) {
				int col = data.MainSelection.Anchor > data.MainSelection.Lead ? data.MainSelection.Lead.Column : data.MainSelection.Anchor.Column;
				int line = data.MainSelection.MaxLine + 1;
				data.ClearSelection ();
				if (line <= data.Document.LineCount) {
					int offset = data.Document.LocationToOffset (line, col);
					data.Caret.SetToOffsetWithDesiredColumn (MoveCaretOutOfFolding (data, offset));
				} else {
					data.Caret.Offset = data.Document.TextLength;
				}
				return;
			}
			
			if (data.Caret.Line < data.Document.LineCount) {
				int nextLine = data.LogicalToVisualLine (data.Caret.Line) + 1;
				int line = data.VisualToLogicalLine (nextLine);
				int offset = MoveCaretOutOfFolding (data, data.LocationToOffset (line, data.Caret.Column), true);
				data.Caret.SetToOffsetWithDesiredColumn (offset);
			} else {
				ToDocumentEnd (data);
			}
		}

		public static void PageUp (TextEditorData data)
		{
			int pageLines = (int)((data.VAdjustment.PageSize + ((int)data.VAdjustment.Value % data.LineHeight)) / data.LineHeight);
			int visualLine = data.LogicalToVisualLine (data.Caret.Line);
			visualLine -= pageLines;
			int line = System.Math.Max (data.VisualToLogicalLine (visualLine), DocumentLocation.MinLine);
			int offset = data.LocationToOffset (line, data.Caret.Column);
			ScrollActions.PageUp (data);
			data.Caret.Offset = MoveCaretOutOfFolding (data, offset);
		}

		public static bool IsFolded (TextEditorData data, int line, int column)
		{
			int offset = data.LocationToOffset (line, column);
			return data.Document.GetFoldingsFromOffset (offset).Any (f => f.isFolded && f.Offset < offset && offset < f.EndOffset);
		}

		public static List<InsertionPoint> GetInsertionPoints (TextEditorData data, ParsedDocument parsedDocument, IType type)
		{
			if (data == null)
				throw new ArgumentNullException ("data");
			if (parsedDocument == null)
				throw new ArgumentNullException ("parsedDocument");
			if (type == null)
				throw new ArgumentNullException ("type");
			List<InsertionPoint> result = new List<InsertionPoint> ();
			int offset = data.LocationToOffset (type.BodyRegion.Start.Line, type.BodyRegion.Start.Column);
			if (offset < 0)
				return result;
			
			while (offset < data.Length && data.GetCharAt (offset) != '{') {
				offset++;
			}
			
			var realStartLocation = data.OffsetToLocation (offset);
			result.Add (GetInsertionPosition (data.Document, realStartLocation.Line, realStartLocation.Column));
			result[0].LineBefore = NewLineInsertion.None;
			foreach (IMember member in type.Members) {
				DomLocation domLocation = member.BodyRegion.End;
				if (domLocation.Line <= 0) {
					LineSegment lineSegment = data.GetLine (member.Location.Line);
					if (lineSegment == null)
						continue;
					domLocation = new DomLocation (member.Location.Line, lineSegment.EditableLength + 1);
				}
				result.Add (GetInsertionPosition (data.Document, domLocation.Line, domLocation.Column));
			}
			result[result.Count - 1].LineAfter = NewLineInsertion.None;
			CheckStartPoint (data.Document, result[0], result.Count == 1);
			if (result.Count > 1) {
				result.RemoveAt (result.Count - 1); 
				NewLineInsertion insertLine;
				var lineBefore = data.GetLine (type.BodyRegion.End.Line - 1);
				if (lineBefore != null && lineBefore.EditableLength == lineBefore.GetIndentation (data.Document).Length) {
					insertLine = NewLineInsertion.None;
				} else {
					insertLine = NewLineInsertion.Eol;
				}
				// search for line start
				var line = data.GetLine (type.BodyRegion.End.Line);
				int col = type.BodyRegion.End.Column - 1;
				while (col > 1 && char.IsWhiteSpace (data.GetCharAt (line.Offset + col - 2)))
					col--;
				result.Add (new InsertionPoint (new DocumentLocation (type.BodyRegion.End.Line, col), insertLine, NewLineInsertion.Eol));
				CheckEndPoint (data.Document, result[result.Count - 1], result.Count == 1);
			}
			
			foreach (var region in parsedDocument.UserRegions.Where (r => type.BodyRegion.Contains (r.Region))) {
				result.Add (new InsertionPoint (new DocumentLocation (region.Region.Start.Line + 1, 1), NewLineInsertion.Eol, NewLineInsertion.Eol));
				result.Add (new InsertionPoint (new DocumentLocation (region.Region.End.Line, 1), NewLineInsertion.Eol, NewLineInsertion.Eol));
				result.Add (new InsertionPoint (new DocumentLocation (region.Region.End.Line + 1, 1), NewLineInsertion.Eol, NewLineInsertion.Eol));
			}
			result.Sort ((left, right) => left.Location.CompareTo (right.Location));
			return result;
		}

		public static string ResolveExpression (TextEditorData editor, ResolveResult result, AstNode node, out int startOffset)
		{
			//Console.WriteLine ("result is a {0}", result.GetType ().Name);
			startOffset = -1;

			if (result is NamespaceResolveResult ||
			    result is ConversionResolveResult ||
			    result is ConstantResolveResult ||
			    result is ForEachResolveResult ||
			    result is TypeIsResolveResult ||
			    result is TypeOfResolveResult ||
			    result is ErrorResolveResult)
				return null;

			if (result.IsCompileTimeConstant)
				return null;

			startOffset = editor.LocationToOffset (node.StartLocation.Line, node.StartLocation.Column);

			if (result is InvocationResolveResult) {
				var ir = (InvocationResolveResult) result;
				if (ir.Member.Name == ".ctor") {
					// if the user is hovering over something like "new Abc (...)", we want to show them type information for Abc
					return ir.Member.DeclaringType.FullName;
				}

				// do not support general method invocation for tooltips because it could cause side-effects
				return null;
			} else if (result is LocalResolveResult) {
				if (node is ParameterDeclaration) {
					// user is hovering over a method parameter, but we don't want to include the parameter type
					var param = (ParameterDeclaration) node;

					return GetIdentifierName (editor, param.NameToken, out startOffset);
				}

				if (node is VariableInitializer) {
					// user is hovering over something like "int fubar = 5;", but we don't want the expression to include the " = 5"
					var variable = (VariableInitializer) node;

					return GetIdentifierName (editor, variable.NameToken, out startOffset);
				}
			} else if (result is MemberResolveResult) {
				var mr = (MemberResolveResult) result;

				if (node is PropertyDeclaration) {
					var prop = (PropertyDeclaration) node;
					var name = GetIdentifierName (editor, prop.NameToken, out startOffset);

					// if the property is static, then we want to return "Full.TypeName.Property"
					if (prop.Modifiers.HasFlag (Modifiers.Static))
						return mr.Member.DeclaringType.FullName + "." + name;

					// otherwise we want to return "this.Property" so that it won't conflict with anything else in the local scope
					return "this." + name;
				}

				if (node is FieldDeclaration) {
					var field = (FieldDeclaration) node;
					var name = GetIdentifierName (editor, field.NameToken, out startOffset);

					// if the field is static, then we want to return "Full.TypeName.Field"
					if (field.Modifiers.HasFlag (Modifiers.Static))
						return mr.Member.DeclaringType.FullName + "." + name;

					// otherwise we want to return "this.Field" so that it won't conflict with anything else in the local scope
					return "this." + name;
				}

				if (node is VariableInitializer) {
					// user is hovering over a field declaration that includes initialization
					var variable = (VariableInitializer) node;
					var name = GetIdentifierName (editor, variable.NameToken, out startOffset);

					// walk up the AST to find the FieldDeclaration so that we can determine if it is static or not
					var field = variable.GetParent<FieldDeclaration> ();

					// if the field is static, then we want to return "Full.TypeName.Field"
					if (field.Modifiers.HasFlag (Modifiers.Static))
						return mr.Member.DeclaringType.FullName + "." + name;

					// otherwise we want to return "this.Field" so that it won't conflict with anything else in the local scope
					return "this." + name;
				}

				if (node is NamedExpression) {
					// user is hovering over 'Property' in an expression like: var fubar = new Fubar () { Property = baz };
					var variable = node.GetParent<VariableInitializer> ();
					if (variable != null) {
						var variableName = GetIdentifierName (editor, variable.NameToken, out startOffset);
						var name = GetIdentifierName (editor, ((NamedExpression) node).NameToken, out startOffset);

						return variableName + "." + name;
					}
				}
			} else if (result is TypeResolveResult) {
				return ((TypeResolveResult) result).Type.FullName;
			}

			return editor.GetTextBetween (node.StartLocation, node.EndLocation);
//.........这里部分代码省略.........

		static string GetIdentifierName (TextEditorData editor, Identifier id, out int startOffset)
		{
			startOffset = editor.LocationToOffset (id.StartLocation.Line, id.StartLocation.Column);

			return editor.GetTextBetween (id.StartLocation, id.EndLocation);
		}

		public string ResolveExpression (TextEditorData ed, Document doc, int offset, out int startOffset)
		{
			startOffset = offset;
			var editorData = DResolverWrapper.CreateEditorData(doc);
			if (editorData == null)
				return null;
			editorData.CaretOffset = offset;
			var edLoc = ed.OffsetToLocation(offset);
			editorData.CaretLocation = new CodeLocation(edLoc.Column,edLoc.Line);

			var o = DResolver.GetScopedCodeObject(editorData);
			if (o != null) {
				startOffset = ed.LocationToOffset (o.Location.Line, o.Location.Column);
				if (o is INode)
					return (o as INode).Name;
				return o.ToString ();
			}

			return null;
		}