C# TextEditorData.LogicalToVisualLocation方法代码示例

		/// <summary>
		/// Gets the outermost closed fold pertaining to the current caret position
		/// </summary>
		static FoldSegment GetOutermostClosedFold (TextEditorData data)
		{
			FoldSegment currentFold = null;
			int endOffset = -1, startOffset = int.MaxValue;
			IEnumerable<FoldSegment> folds = data.Document.GetFoldingContaining (data.Caret.Line);
			int lineNumber = data.LogicalToVisualLocation (data.Caret.Location).Line;
			if (null != folds) {
				foreach (FoldSegment fold in folds) {
					if (fold.IsFolded && data.Document.LogicalToVisualLine (data.Document.OffsetToLineNumber (fold.Offset)) == lineNumber && 
					    fold.Offset <= startOffset && fold.EndOffset >= endOffset) {
						currentFold = fold;
						startOffset = fold.Offset;
						endOffset = fold.EndOffset;
					}
				}
			}
			
			return currentFold;
		}

			void CopyData (TextEditorData data, Selection selection)
			{
				copiedDocument = null;
				monoDocument = null;
				if (selection != null && data != null && data.Document != null) {
					copiedDocument = new TextDocument ();
					monoDocument = new TextDocument ();
					this.docStyle = data.ColorStyle;
					this.options = data.Options;
					this.mode = SyntaxModeService.GetSyntaxMode (monoDocument, data.MimeType);
					switch (selection.SelectionMode) {
					case SelectionMode.Normal:
						isBlockMode = false;
						var segment = selection.GetSelectionRange (data);
						var text = data.GetTextAt (segment);
						copiedDocument.Text = text;
						monoDocument.Text = text;
						var line = data.Document.GetLineByOffset (segment.Offset);
						var spanStack = line.StartSpan.Clone ();
						SyntaxModeService.ScanSpans (data.Document, this.mode as SyntaxMode, this.mode as SyntaxMode, spanStack, line.Offset, segment.Offset);
						this.copiedDocument.GetLine (DocumentLocation.MinLine).StartSpan = spanStack;
						break;
					case SelectionMode.Block:
						isBlockMode = true;
						DocumentLocation visStart = data.LogicalToVisualLocation (selection.Anchor);
						DocumentLocation visEnd = data.LogicalToVisualLocation (selection.Lead);
						int startCol = System.Math.Min (visStart.Column, visEnd.Column);
						int endCol = System.Math.Max (visStart.Column, visEnd.Column);
						for (int lineNr = selection.MinLine; lineNr <= selection.MaxLine; lineNr++) {
							DocumentLine curLine = data.Document.GetLine (lineNr);
							int col1 = curLine.GetLogicalColumn (data, startCol) - 1;
							int col2 = System.Math.Min (curLine.GetLogicalColumn (data, endCol) - 1, curLine.Length);
							if (col1 < col2) {
								copiedDocument.Insert (copiedDocument.TextLength, data.Document.GetTextAt (curLine.Offset + col1, col2 - col1));
								monoDocument.Insert (monoDocument.TextLength, data.Document.GetTextAt (curLine.Offset + col1, col2 - col1));
							}
							if (lineNr < selection.MaxLine) {
								// Clipboard line end needs to be system dependend and not the document one.
								copiedDocument.Insert (copiedDocument.TextLength, Environment.NewLine);
								// \r in mono document stands for block selection line end.
								monoDocument.Insert (monoDocument.TextLength, "\r");
							}
						}
						line = data.Document.GetLine (selection.MinLine);
						spanStack = line.StartSpan.Clone ();
						SyntaxModeService.ScanSpans (data.Document, this.mode as SyntaxMode, this.mode as SyntaxMode, spanStack, line.Offset, line.Offset + startCol);
						this.copiedDocument.GetLine (DocumentLocation.MinLine).StartSpan = spanStack;
						break;
					}
				} else {
					copiedDocument = null;
				}
			}

		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;
						
						using (var undo = data.OpenUndoGroup ()) {
							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);
								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;
								}
							} else if (pasteLine) {
								result = text.Length;
								DocumentLine curLine = data.Document.GetLine (data.Caret.Line);
								data.Insert (curLine.Offset, text + data.EolMarker);
							} else {
								int offset = data.Caret.Offset;
								data.InsertAtCaret (text);
								data.PasteText (offset, text, data.Caret.Offset - offset);
							}
							/*				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;
						}
					}
				});
				// 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 ()) {
						int caretPos = data.Caret.Offset;
						if (data.IsSomethingSelected && data.MainSelection.SelectionMode == SelectionMode.Block) {
							data.Caret.PreserveSelection = true;
							data.DeleteSelectedText (false);
							int textLength = 0;
							int minLine = data.MainSelection.MinLine;
							int maxLine = data.MainSelection.MaxLine;
							var visualInsertLocation = data.LogicalToVisualLocation (data.Caret.Location);
							for (int lineNumber = minLine; lineNumber <= maxLine; lineNumber++) {
								DocumentLine lineSegment = data.GetLine (lineNumber);
								int insertOffset = lineSegment.GetLogicalColumn (data, visualInsertLocation.Column) - 1;
								if (lineSegment.Length < insertOffset) {
									int visualLastColumn = lineSegment.GetVisualColumn (data, lineSegment.Length + 1);
									int charsToInsert = visualInsertLocation.Column - visualLastColumn;
									int spaceCount = charsToInsert % data.Options.TabSize;
									string textToInsert = new string ('\t', (charsToInsert - spaceCount) / data.Options.TabSize) + new string (' ', spaceCount) + text;
									insertOffset = lineSegment.Length;
									int insertedChars = data.Insert (lineSegment.Offset + insertOffset, textToInsert);
									data.PasteText (lineSegment.Offset + insertOffset, textToInsert, insertedChars);
								} else {
									textLength = data.Insert (lineSegment.Offset + insertOffset, text);
									data.PasteText (lineSegment.Offset + insertOffset, text, textLength);
								}
							}
							
							data.MainSelection.Anchor = new DocumentLocation (System.Math.Max (DocumentLocation.MinLine, data.Caret.Line == minLine ? maxLine : minLine), System.Math.Max (DocumentLocation.MinColumn, data.Caret.Column - textLength));
							data.MainSelection.Lead = new DocumentLocation (data.Caret.Line, data.Caret.Column);
							data.Caret.PreserveSelection = false;
//.........这里部分代码省略.........

		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;
		}

		public static void InsertTab (TextEditorData data)
		{
			if (!data.CanEditSelection)
				return;
			if (data.IsMultiLineSelection && data.MainSelection.SelectionMode != SelectionMode.Block) {
				IndentSelection (data);
				return;
			}
			using (var undo = data.OpenUndoGroup ()) {
				string indentationString = "\t";
				bool convertTabToSpaces = data.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.LogicalToVisualLocation (data.Caret.Location);
					int tabWidth = TextViewMargin.GetNextTabstop (data, visualLocation.Column) - visualLocation.Column;
					indentationString = new string (' ', tabWidth);
				}
				if (data.IsSomethingSelected)
					data.DeleteSelectedText (data.MainSelection.SelectionMode != SelectionMode.Block);
				data.InsertAtCaret (indentationString);
			}
		}

			void CopyData (TextEditorData data, Selection selection)
			{
				if (!selection.IsEmpty && data != null && data.Document != null) {
					this.docStyle = data.ColorStyle;
					this.options = data.Options;
					copyData = null;


					switch (selection.SelectionMode) {
					case SelectionMode.Normal:
						isBlockMode = false;
						var segment = selection.GetSelectionRange (data);
						copiedColoredChunks = ColoredSegment.GetChunks (data, segment);
						var pasteHandler = data.TextPasteHandler;
						if (pasteHandler != null)
							copyData = pasteHandler.GetCopyData (segment);
						break;
					case SelectionMode.Block:
						isBlockMode = true;
						DocumentLocation visStart = data.LogicalToVisualLocation (selection.Anchor);
						DocumentLocation visEnd = data.LogicalToVisualLocation (selection.Lead);
						int startCol = System.Math.Min (visStart.Column, visEnd.Column);
						int endCol = System.Math.Max (visStart.Column, visEnd.Column);
						copiedColoredChunks = new List<List<ColoredSegment>> ();
						for (int lineNr = selection.MinLine; lineNr <= selection.MaxLine; lineNr++) {
							DocumentLine curLine = data.Document.GetLine (lineNr);
							int col1 = curLine.GetLogicalColumn (data, startCol) - 1;
							int col2 = System.Math.Min (curLine.GetLogicalColumn (data, endCol) - 1, curLine.Length);
							if (col1 < col2) {
								copiedColoredChunks.Add (ColoredSegment.GetChunks (data, new TextSegment (curLine.Offset + col1, col2 - col1)).First ());
							} else {
								copiedColoredChunks.Add (new List<ColoredSegment> ());
							}
						}
						break;
					}
				} else {
					copiedColoredChunks = null;
				}
			}

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

						var visualColumn = data.GetLine (data.Caret.Location.Line).GetVisualColumn (data, col - 1);
						data.MainSelection = new Selection (
							new DocumentLocation (data.MainSelection.Anchor.Line, data.GetLine (data.MainSelection.Anchor.Line).GetLogicalColumn (data, visualColumn)),
							new DocumentLocation (data.MainSelection.Lead.Line, data.GetLine (data.MainSelection.Lead.Line).GetLogicalColumn (data, visualColumn)),
							SelectionMode.Block
						);

						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);
					if (lineAbove.Length == 0 && data.HasIndentationTracker && data.Options.IndentStyle == IndentStyle.Virtual) {
						data.Caret.Location = new DocumentLocation (data.Caret.Line - 1, data.IndentationTracker.GetVirtualIndentationColumn (data.Caret.Line - 1, 1));
						data.Replace (lineAbove.EndOffsetIncludingDelimiter - lineAbove.DelimiterLength, lineAbove.DelimiterLength, data.IndentationTracker.GetIndentationString (data.Caret.Line - 1, 1));
					} else {
						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 ();
			}
		}

			void CopyData (TextEditorData data, Selection selection)
			{
				copiedDocument = null;
				monoDocument = null;
				if (selection != null && data != null && data.Document != null) {
					copiedDocument = new Document ();
					monoDocument = new Document ();
					this.docStyle = data.ColorStyle;
					this.options = data.Options;
					this.mode = data.Document.SyntaxMode != null && data.Options.EnableSyntaxHighlighting ? data.Document.SyntaxMode : Mono.TextEditor.Highlighting.SyntaxMode.Default;
					switch (selection.SelectionMode) {
					case SelectionMode.Normal:
						isBlockMode = false;
						ISegment segment = selection.GetSelectionRange (data);
						copiedDocument.Text = this.mode.GetTextWithoutMarkup (data.Document, data.ColorStyle, segment.Offset, segment.Length);
						monoDocument.Text = this.mode.GetTextWithoutMarkup (data.Document, data.ColorStyle, segment.Offset, segment.Length);
						LineSegment line = data.Document.GetLineByOffset (segment.Offset);
						var spanStack = line.StartSpan.Clone ();
						SyntaxModeService.ScanSpans (data.Document, this.mode, this.mode, spanStack, line.Offset, segment.Offset);
						this.copiedDocument.GetLine (0).StartSpan = spanStack;
						break;
					case SelectionMode.Block:
						isBlockMode = true;
						DocumentLocation visStart = data.LogicalToVisualLocation (selection.Anchor);
						DocumentLocation visEnd = data.LogicalToVisualLocation (selection.Lead);
						int startCol = System.Math.Min (visStart.Column, visEnd.Column);
						int endCol = System.Math.Max (visStart.Column, visEnd.Column);
						for (int lineNr = selection.MinLine; lineNr <= selection.MaxLine; lineNr++) {
							LineSegment curLine = data.Document.GetLine (lineNr);
							int col1 = curLine.GetLogicalColumn (data, startCol);
							int col2 = System.Math.Min (curLine.GetLogicalColumn (data, endCol), curLine.EditableLength);
							if (col1 < col2) {
								((IBuffer)copiedDocument).Insert (copiedDocument.Length, data.Document.GetTextAt (curLine.Offset + col1, col2 - col1));
								((IBuffer)monoDocument).Insert (monoDocument.Length, data.Document.GetTextAt (curLine.Offset + col1, col2 - col1));
							}
							if (lineNr < selection.MaxLine) {
								// Clipboard line end needs to be system dependend and not the document one.
								((IBuffer)copiedDocument).Insert (copiedDocument.Length, Environment.NewLine);
								// \r in mono document stands for block selection line end.
								((IBuffer)monoDocument).Insert (monoDocument.Length, "\r");
							}
						}
						line    = data.Document.GetLine (selection.MinLine);
						spanStack = line.StartSpan.Clone ();
						SyntaxModeService.ScanSpans (data.Document, this.mode, this.mode, spanStack, line.Offset, line.Offset + startCol);
						this.copiedDocument.GetLine (0).StartSpan = spanStack;
						break;
					}
				} else {
					copiedDocument = null;
				}
			}

		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.LogicalToVisualLocation (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 ();
		}