C# TextEditorData.DeleteSelectedText方法代码示例

		public static void DeleteSelection (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			if (data.IsSomethingSelected) {
				data.DeleteSelectedText ();
				return;
			}
		}

		public static void InsertNewLine (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			
			using (var undo = data.OpenUndoGroup ()) {
				if (data.IsSomethingSelected) {
					var end = data.MainSelection.End;
					data.DeleteSelectedText ();
					if (end.Column == 1) {
						CaretMoveActions.InternalCaretMoveHome (data, true, false);
						return;
					}
				}
				switch (data.Options.IndentStyle) {
				case IndentStyle.None:
					data.InsertAtCaret (data.EolMarker);
					break;
				case IndentStyle.Auto:
					data.EnsureCaretIsNotVirtual ();
					var indent = data.Document.GetLineIndent (data.Caret.Line);
					data.InsertAtCaret (data.EolMarker);
					data.EnsureCaretIsNotVirtual ();
					if (data.GetLine (data.Caret.Line).Length == 0)
						data.InsertAtCaret (indent);
					break;
				case IndentStyle.Smart:
					if (!data.HasIndentationTracker)
						goto case IndentStyle.Auto;
					NewLineSmartIndent (data);
					break;
				case IndentStyle.Virtual:
					if (!data.HasIndentationTracker)
						goto case IndentStyle.Auto;
					var oldLine = data.Caret.Line;
					var curLine = data.GetLine (oldLine);
					var indentCol = data.GetVirtualIndentationColumn (data.Caret.Location);
					if (curLine.Length >= data.Caret.Column) {
						NewLineSmartIndent (data);
						data.FixVirtualIndentation ();
						data.FixVirtualIndentation (oldLine);
						break;
					}
					data.Insert (data.Caret.Offset, data.EolMarker);
					data.FixVirtualIndentation (oldLine);
					data.Caret.Column = indentCol;
					break;
				default:
					throw new ArgumentOutOfRangeException ();
				}
			}
		}

		public static void Delete (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			if (data.IsSomethingSelected) {
				// case: zero width block selection
				if (data.MainSelection.SelectionMode == SelectionMode.Block && data.MainSelection.Anchor.Column == data.MainSelection.Lead.Column) {
					var col = data.MainSelection.Lead.Column;
					if (col <= DocumentLocation.MinColumn) {
						data.ClearSelection ();
						return;
					}
					bool preserve = data.Caret.PreserveSelection;
					data.Caret.PreserveSelection = true;
					col--;
					for (int lineNumber = data.MainSelection.MinLine; lineNumber <= data.MainSelection.MaxLine; lineNumber++) {
						LineSegment lineSegment = data.Document.GetLine (lineNumber);
						if (col < lineSegment.EditableLength)
							data.Remove (lineSegment.Offset + col, 1);
					}
					data.Caret.PreserveSelection = preserve;
					data.Document.CommitMultipleLineUpdate (data.MainSelection.MinLine, data.MainSelection.MaxLine);
					return;
				}
				data.DeleteSelectedText (data.MainSelection.SelectionMode != SelectionMode.Block);
				return;
			}
			if (data.Caret.Offset >= data.Document.Length)
				return;
			LineSegment line = data.Document.GetLine (data.Caret.Line);
			if (data.Caret.Column == line.EditableLength + 1) {
				if (data.Caret.Line < data.Document.LineCount) { 
					data.Remove (line.EndOffset - line.DelimiterLength, line.DelimiterLength);
					if (line.EndOffset == data.Document.Length)
						line.DelimiterLength = 0;
				}
			} else {
				data.Remove (data.Caret.Offset, 1); 
				data.Document.CommitLineUpdate (data.Caret.Line);
			}
		}

		public static void Delete (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			if (data.IsSomethingSelected) {
				data.DeleteSelectedText ();
				return;
			}
			if (data.Caret.Offset >= data.Document.Length)
				return;
			LineSegment line = data.Document.GetLine (data.Caret.Line);
			if (data.Caret.Column == line.EditableLength) {
				if (data.Caret.Line < data.Document.LineCount) { 
					data.Remove (line.EndOffset - line.DelimiterLength, line.DelimiterLength);
					if (line.EndOffset == data.Document.Length)
						line.DelimiterLength = 0;
				}
			} else {
				data.Remove (data.Caret.Offset, 1); 
				data.Document.CommitLineUpdate (data.Caret.Line);
			}
		}

		static int PastePlainText (TextEditorData data, int offset, string text, bool preserveSelection = false)
		{
			int inserted = 0;
			using (var undo = data.OpenUndoGroup ()) {
				var version = data.Document.Version;
				if (!preserveSelection)
					data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
				data.EnsureCaretIsNotVirtual ();
				if (data.IsSomethingSelected && data.MainSelection.SelectionMode == SelectionMode.Block) {
					var selection = data.MainSelection;
					var visualInsertLocation = data.LogicalToVisualLocation (selection.Anchor);
					for (int lineNumber = selection.MinLine; lineNumber <= selection.MaxLine; lineNumber++) {
						var lineSegment = data.GetLine (lineNumber);
						int insertOffset = lineSegment.GetLogicalColumn (data, visualInsertLocation.Column) - 1;
						string textToInsert;
						if (lineSegment.Length < insertOffset) {
							int visualLastColumn = lineSegment.GetVisualColumn (data, lineSegment.Length + 1);
							int charsToInsert = visualInsertLocation.Column - visualLastColumn;
							int spaceCount = charsToInsert % data.Options.TabSize;
							textToInsert = new string ('\t', (charsToInsert - spaceCount) / data.Options.TabSize) + new string (' ', spaceCount) + text;
							insertOffset = lineSegment.Length;
						} else {
							textToInsert = text;
						}
						inserted = data.Insert (lineSegment.Offset + insertOffset, textToInsert);
					}
				} else {
					offset = version.MoveOffsetTo (data.Document.Version, offset);
					inserted = data.PasteText (offset, text);
				}
			}
			return inserted;
		}

		static int PasteFrom (Clipboard clipboard, TextEditorData data, bool preserveSelection, int insertionOffset, bool preserveState)
		{
			int result = -1;
			if (!data.CanEdit (data.Document.OffsetToLineNumber (insertionOffset)))
				return result;
			if (clipboard.WaitIsTargetAvailable (CopyOperation.MD_ATOM)) {
				clipboard.RequestContents (CopyOperation.MD_ATOM, delegate(Clipboard clp, SelectionData selectionData) {
					if (selectionData.Length > 0) {
						byte[] selBytes = selectionData.Data;
	
						string text = System.Text.Encoding.UTF8.GetString (selBytes, 1, selBytes.Length - 1);
						bool pasteBlock = (selBytes [0] & 1) == 1;
						bool pasteLine = (selBytes [0] & 2) == 2;
						
//						var clearSelection = data.IsSomethingSelected ? data.MainSelection.SelectionMode != SelectionMode.Block : true;
						if (pasteBlock) {
							using (var undo = data.OpenUndoGroup ()) {
								var version = data.Document.Version;
								data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
								data.EnsureCaretIsNotVirtual ();
								insertionOffset = version.MoveOffsetTo (data.Document.Version, insertionOffset);

								data.Caret.PreserveSelection = true;
							
								string[] lines = text.Split ('\r');
								int lineNr = data.Document.OffsetToLineNumber (insertionOffset);
								int col = insertionOffset - data.Document.GetLine (lineNr).Offset;
								int visCol = data.Document.GetLine (lineNr).GetVisualColumn (data, col);
								DocumentLine curLine;
								int lineCol = col;
								result = 0;
								for (int i = 0; i < lines.Length; i++) {
									while (data.Document.LineCount <= lineNr + i) {
										data.Insert (data.Document.TextLength, Environment.NewLine);
										result += Environment.NewLine.Length;
									}
									curLine = data.Document.GetLine (lineNr + i);
									if (lines [i].Length > 0) {
										lineCol = curLine.GetLogicalColumn (data, visCol);
										if (curLine.Length + 1 < lineCol) {
											result += lineCol - curLine.Length;
											data.Insert (curLine.Offset + curLine.Length, new string (' ', lineCol - curLine.Length));
										}
										data.Insert (curLine.Offset + lineCol, lines [i]);
										result += lines [i].Length;
									}
									if (!preserveState)
										data.Caret.Offset = curLine.Offset + lineCol + lines [i].Length;
								}
								if (!preserveState)
									data.ClearSelection ();
								data.Caret.PreserveSelection = false;
							}
						} else if (pasteLine) {
							using (var undo = data.OpenUndoGroup ()) {
								data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
								data.EnsureCaretIsNotVirtual ();

								data.Caret.PreserveSelection = true;
								result = text.Length;
								DocumentLine curLine = data.Document.GetLine (data.Caret.Line);
								data.Insert (curLine.Offset, text + data.EolMarker);
								if (!preserveState)
									data.ClearSelection ();
								data.Caret.PreserveSelection = false;
							}
						} else {
							result = PastePlainText (data, insertionOffset, text);
						}
					}
				});
				// we got MD_ATOM text - no need to request text. (otherwise buffer may get copied twice).
				return result;
			}
			
			if (result < 0 && clipboard.WaitIsTextAvailable ()) {
				clipboard.RequestText (delegate(Clipboard clp, string text) {
					if (string.IsNullOrEmpty (text))
						return;
					using (var undo = data.OpenUndoGroup ()) {
						result = PastePlainText (data, insertionOffset, text);
					}
				});
			}
			
			return result;
		}

		public static void Backspace (TextEditorData data, Action<TextEditorData> removeCharBeforeCaret)
		{
			if (!data.CanEditSelection)
				return;
			if (data.IsSomethingSelected) {
				// case: zero width block selection
				if (data.MainSelection.SelectionMode == SelectionMode.Block && data.MainSelection.Anchor.Column == data.MainSelection.Lead.Column) {
					var col = data.MainSelection.Lead.Column;
					if (col <= DocumentLocation.MinColumn) {
						data.ClearSelection ();
						return;
					}
					bool preserve = data.Caret.PreserveSelection;
					data.Caret.PreserveSelection = true;
					col--;
					for (int lineNumber = data.MainSelection.MinLine; lineNumber <= data.MainSelection.MaxLine; lineNumber++) {
						data.Remove (data.Document.GetLine (lineNumber).Offset + col - 1, 1);
					}
					data.MainSelection.Lead = new DocumentLocation (data.MainSelection.Lead.Line, col);
					data.MainSelection.Anchor = new DocumentLocation (data.MainSelection.Anchor.Line, col);
					data.Caret.PreserveSelection = preserve;
					data.Document.CommitMultipleLineUpdate (data.MainSelection.MinLine, data.MainSelection.MaxLine);
					return;
				}
				data.DeleteSelectedText (data.MainSelection.SelectionMode != SelectionMode.Block);
				return;
			}

			if (data.Caret.Line == DocumentLocation.MinLine && data.Caret.Column == DocumentLocation.MinColumn)
				return;
			
			// Virtual indentation needs to be fixed before to have the same behavior
			// if it's there or not (otherwise user has to press multiple backspaces in some cases)
			data.EnsureCaretIsNotVirtual ();
			DocumentLine line = data.Document.GetLine (data.Caret.Line);
			if (data.Caret.Column > line.Length + 1) {
				data.Caret.Column = line.Length + 1;
			} else if (data.Caret.Offset == line.Offset) {
				DocumentLine lineAbove = data.Document.GetLine (data.Caret.Line - 1);
				data.Remove (lineAbove.EndOffsetIncludingDelimiter - lineAbove.DelimiterLength, lineAbove.DelimiterLength);
			} else {
				removeCharBeforeCaret (data);
			}

			// Needs to be fixed after, the line may just contain the indentation
			data.FixVirtualIndentation ();
		}

		public static void InsertNewLine (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			
			using (var undo = data.OpenUndoGroup ()) {
				if (data.IsSomethingSelected)
					data.DeleteSelectedText ();
				switch (data.Options.IndentStyle) {
				case IndentStyle.None:
					data.InsertAtCaret (data.EolMarker);
					break;
				case IndentStyle.Auto:
					data.EnsureCaretIsNotVirtual ();
					var sb = new StringBuilder (data.EolMarker);
					sb.Append (data.Document.GetLineIndent (data.Caret.Line));
					data.InsertAtCaret (sb.ToString ());
					break;
				case IndentStyle.Smart:
					if (!data.HasIndentationTracker)
						goto case IndentStyle.Auto;
					NewLineSmartIndent (data);
					break;
				case IndentStyle.Virtual:
					if (!data.HasIndentationTracker)
						goto case IndentStyle.Auto;
					var oldLine = data.Caret.Line;
					var curLine = data.GetLine (oldLine);
					var indentCol = data.GetVirtualIndentationColumn (data.Caret.Location);
					if (curLine.Length >= data.Caret.Column) {
						NewLineSmartIndent (data);
						data.FixVirtualIndentation ();
						data.FixVirtualIndentation (oldLine);
						break;
					}
					data.Insert (data.Caret.Offset, data.EolMarker);
					data.FixVirtualIndentation (oldLine);
					data.Caret.Column = indentCol;
					break;
				default:
					throw new ArgumentOutOfRangeException ();
				}
			}
		}

		public static void InsertNewLine (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			
			data.Document.BeginAtomicUndo ();
			if (data.IsSomethingSelected)
				data.DeleteSelectedText ();
			
			data.EnsureCaretIsNotVirtual ();
			StringBuilder sb = new StringBuilder (data.EolMarker);
			if (data.Options.AutoIndent)
				sb.Append (data.Document.GetLineIndent (data.Caret.Line));
			int offset = data.Caret.Offset;
			data.Insert (offset, sb.ToString ());
			data.Caret.Offset = offset + sb.Length;
			data.Document.EndAtomicUndo ();
		}

		static int PasteFrom (Clipboard clipboard, TextEditorData data, bool preserveSelection, int insertionOffset, bool preserveState)
		{
			int result = -1;
			if (!data.CanEdit (data.Document.OffsetToLineNumber (insertionOffset)))
				return result;
			if (clipboard.WaitIsTargetAvailable (CopyOperation.MD_ATOM)) {
				clipboard.RequestContents (CopyOperation.MD_ATOM, delegate(Clipboard clp, SelectionData selectionData) {
					if (selectionData.Length > 0) {
						byte[] selBytes = selectionData.Data;
						var upperBound = System.Math.Max (0, System.Math.Min (selBytes [1], selBytes.Length - 2));
						byte[] copyData = new byte[upperBound];
						Array.Copy (selBytes, 2, copyData, 0, copyData.Length);
						var rawTextOffset = 1 + 1 + copyData.Length;
						string text = Encoding.UTF8.GetString (selBytes, rawTextOffset, selBytes.Length - rawTextOffset);
						bool pasteBlock = (selBytes [0] & 1) == 1;
						bool pasteLine = (selBytes [0] & 2) == 2;
						if (pasteBlock) {
							using (var undo = data.OpenUndoGroup ()) {
								var version = data.Document.Version;
								if (!preserveSelection)
									data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
								int startLine = data.Caret.Line;
								data.EnsureCaretIsNotVirtual ();
								insertionOffset = version.MoveOffsetTo (data.Document.Version, insertionOffset);

								data.Caret.PreserveSelection = true;
								var lines = new List<string> ();
								int offset = 0;
								while (true) {
									var delimiter = LineSplitter.NextDelimiter (text, offset);
									if (delimiter.IsInvalid)
										break;

									int delimiterEndOffset = delimiter.EndOffset;
									lines.Add (text.Substring (offset, delimiter.Offset - offset));
									offset = delimiterEndOffset;
								}
								if (offset < text.Length)
									lines.Add (text.Substring (offset, text.Length - offset));

								int lineNr = data.Document.OffsetToLineNumber (insertionOffset);
								int col = insertionOffset - data.Document.GetLine (lineNr).Offset;
								int visCol = data.Document.GetLine (lineNr).GetVisualColumn (data, col);
								DocumentLine curLine;
								int lineCol = col;
								result = 0;
								for (int i = 0; i < lines.Count; i++) {
									while (data.Document.LineCount <= lineNr + i) {
										data.Insert (data.Document.TextLength, Environment.NewLine);
										result += Environment.NewLine.Length;
									}
									curLine = data.Document.GetLine (lineNr + i);
									if (lines [i].Length > 0) {
										lineCol = curLine.GetLogicalColumn (data, visCol);
										if (curLine.Length + 1 < lineCol) {
											result += lineCol - curLine.Length;
											data.Insert (curLine.Offset + curLine.Length, new string (' ', lineCol - curLine.Length));
										}
										data.Insert (curLine.Offset + lineCol, lines [i]);
										result += lines [i].Length;
									}
									if (!preserveState)
										data.Caret.Offset = curLine.Offset + lineCol + lines [i].Length;
								}
								if (!preserveState)
									data.ClearSelection ();
								data.FixVirtualIndentation (startLine); 
								data.Caret.PreserveSelection = false;
							}
						} else if (pasteLine) {
							using (var undo = data.OpenUndoGroup ()) {
								if (!preserveSelection)
									data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
								data.EnsureCaretIsNotVirtual ();

								data.Caret.PreserveSelection = true;
								result = text.Length;
								DocumentLine curLine = data.Document.GetLine (data.Caret.Line);

								result = PastePlainText (data, curLine.Offset,  text + data.EolMarker, preserveSelection, copyData);
								if (!preserveState)
									data.ClearSelection ();
								data.Caret.PreserveSelection = false;
								data.FixVirtualIndentation (curLine.LineNumber); 
							}
						} else {
							result = PastePlainText (data, insertionOffset, text, preserveSelection, copyData);
						}
					}
				});
				// we got MD_ATOM text - no need to request text. (otherwise buffer may get copied twice).
				return result;
			}
			
			if (result < 0 && clipboard.WaitIsTextAvailable ()) {
				clipboard.RequestText (delegate(Clipboard clp, string text) {
					if (string.IsNullOrEmpty (text))
						return;
					result = PastePlainText (data, insertionOffset, text, preserveSelection);
				});
//.........这里部分代码省略.........

		public static void InsertTab (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			
			if (data.IsMultiLineSelection) {
				IndentSelection (data);
				return;
			}
			data.Document.BeginAtomicUndo ();
			if (data.IsSomethingSelected) {
				data.DeleteSelectedText ();
			}
			string indentationString = "\t";
			bool convertTabToSpaces = data.Options.TabsToSpaces;
			
			if (!convertTabToSpaces && !data.Options.AllowTabsAfterNonTabs) {
				for (int i = 1; i < data.Caret.Column; i++) {
					if (data.Document.GetCharAt (data.Caret.Offset - i) != '\t') {
						convertTabToSpaces = true;
						break;
					}
				}
			}
			
			if (convertTabToSpaces) {
				DocumentLocation visualLocation = data.Document.LogicalToVisualLocation (data, data.Caret.Location);
				int tabWidth = TextViewMargin.GetNextTabstop (data, visualLocation.Column) - visualLocation.Column;
				indentationString = new string (' ', tabWidth);
			}
			int length = data.Insert (data.Caret.Offset, indentationString);
			data.Caret.Column += length;
			data.Document.EndAtomicUndo ();
		}

		public static void InsertNewLine (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			
			data.Document.BeginAtomicUndo ();
			if (data.IsSomethingSelected) {
				data.DeleteSelectedText ();
			}
			
			string newLine = data.EolMarker;
			int caretColumnOffset = 0;
			LineSegment line = data.Document.GetLine (data.Caret.Line);
			
			if (data.Options.AutoIndent) {
				int i;
				for (i = 0; i < line.EditableLength; i++) {
					char ch = data.Document.GetCharAt (line.Offset + i);
					if (!Char.IsWhiteSpace (ch))
						break;
				}
				caretColumnOffset = i;
				newLine += data.Document.GetTextBetween (line.Offset, line.Offset + i);
			}
			
			data.Insert (data.Caret.Offset, newLine);
			data.Caret.Location = new DocumentLocation (data.Caret.Line + 1, caretColumnOffset);
			data.Document.EndAtomicUndo ();
		}

		public static void Paste (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			using (var undo = data.OpenUndoGroup ()) {
				data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
				data.EnsureCaretIsNotVirtual ();
				PasteFrom (Clipboard.Get (CopyOperation.CLIPBOARD_ATOM), data, true, data.IsSomethingSelected ? data.SelectionRange.Offset : data.Caret.Offset);
			}
		}

		static int PasteFrom (Clipboard clipboard, TextEditorData data, bool preserveSelection, int insertionOffset, bool preserveState)
		{
			int result = -1;
			if (!data.CanEdit (data.Document.OffsetToLineNumber (insertionOffset)))
				return result;
			clipboard.RequestContents (CopyOperation.MD_ATOM, delegate(Clipboard clp, SelectionData selectionData) {
				if (selectionData.Length > 0) {
					byte[] selBytes = selectionData.Data;

					string text = System.Text.Encoding.UTF8.GetString (selBytes, 1, selBytes.Length - 1);
					bool pasteBlock = (selBytes[0] & 1) == 1;
					bool pasteLine = (selBytes[0] & 2) == 2;
					if (!pasteBlock && !pasteLine)
						return;
					
					data.Document.BeginAtomicUndo ();
					if (preserveSelection && data.IsSomethingSelected)
						data.DeleteSelectedText ();
					
					data.Caret.PreserveSelection = true;
					if (pasteBlock) {
						string[] lines = text.Split ('\r');
						int lineNr = data.Document.OffsetToLineNumber (insertionOffset);
						int col = insertionOffset - data.Document.GetLine (lineNr).Offset;
						int visCol = data.Document.GetLine (lineNr).GetVisualColumn (data, col);
						LineSegment curLine;
						int lineCol = col;
						result = 0;
						for (int i = 0; i < lines.Length; i++) {
							while (data.Document.LineCount <= lineNr + i) {
								data.Insert (data.Document.Length, Environment.NewLine);
								result += Environment.NewLine.Length;
							}
							curLine = data.Document.GetLine (lineNr + i);
							if (lines[i].Length > 0) {
								lineCol = curLine.GetLogicalColumn (data, visCol);
								if (curLine.EditableLength + 1 < lineCol) {
									result += lineCol - curLine.EditableLength;
									data.Insert (curLine.Offset + curLine.EditableLength, new string (' ', lineCol - curLine.EditableLength));
								}
								data.Insert (curLine.Offset + lineCol, lines[i]);
								result += lines[i].Length;
							}
							if (!preserveState)
								data.Caret.Offset = curLine.Offset + lineCol + lines[i].Length;
						}
					} else if (pasteLine) {
						result += text.Length;
						LineSegment curLine = data.Document.GetLine (data.Caret.Line);
						data.Insert (curLine.Offset, text + data.EolMarker);
						if (!preserveState)
							data.Caret.Offset += text.Length + data.EolMarker.Length;
					}
					/*				data.MainSelection = new Selection (data.Document.OffsetToLocation (insertionOffset),
					                                    data.Caret.Location,
					                                    lines.Length > 1 ? SelectionMode.Block : SelectionMode.Normal);*/
					if (!preserveState)
						data.ClearSelection ();
					data.Caret.PreserveSelection = false;
					data.Document.EndAtomicUndo ();
				}
			});

			if (result < 0) {
				clipboard.WaitIsTextAvailable ();
				clipboard.RequestText (delegate(Clipboard clp, string text) {
					if (string.IsNullOrEmpty (text))
						return;
					data.Document.BeginAtomicUndo ();
					int caretPos = data.Caret.Offset;
					if (data.IsSomethingSelected && data.MainSelection.SelectionMode == SelectionMode.Block) {
						data.Caret.PreserveSelection = true;
						if (!data.MainSelection.IsDirty) {
							data.DeleteSelectedText (false);
							data.MainSelection.IsDirty = true;
						}
						int textLength = 0;
						int column = data.Caret.Column;
						int minLine = data.MainSelection.MinLine;
						int maxLine = data.MainSelection.MaxLine;
						for (int lineNumber = minLine; lineNumber <= maxLine; lineNumber++) {
							int offset = data.Document.GetLine (lineNumber).Offset + column;
							textLength = data.Insert (offset, text);
							data.PasteText (offset, text);
						}
						
						data.Caret.Offset += textLength;
						data.MainSelection.Anchor = new DocumentLocation (data.Caret.Line == minLine ? maxLine : minLine, data.Caret.Column - textLength);
						data.MainSelection.Lead = new DocumentLocation (data.Caret.Line, data.Caret.Column);
						data.Caret.PreserveSelection = false;
						data.Document.CommitMultipleLineUpdate (data.MainSelection.MinLine, data.MainSelection.MaxLine);
					} else {
						ISegment selection = data.SelectionRange;
						if (preserveSelection && data.IsSomethingSelected)
							data.DeleteSelectedText ();
						data.Caret.PreserveSelection = true;
						//int oldLine = data.Caret.Line;
						int textLength = data.Insert (insertionOffset, text);
						result = textLength;
	
//.........这里部分代码省略.........

		static void PastePlainText (TextEditorData data, string text)
		{
			data.DeleteSelectedText (!data.IsSomethingSelected || data.MainSelection.SelectionMode != SelectionMode.Block);
			int offset = data.Caret.Offset;
			data.InsertAtCaret (text);
			data.PasteText (offset, text, data.Caret.Offset - offset);
		}