public SplitParagraphCommand( ITextEditingCommandController <TContext> controller, TextPosition position) : base(true, false) { // The split paragraph consists of inserting a new line, pasting the // text to the right of the position into that one, and then removing // the text from the current line. var line = (int)position.LinePosition; // Start by inserting the new line. IInsertLineCommand <TContext> insertLineCommand = controller.CreateInsertLineCommand((int)position.LinePosition + 1); insertLineCommand.UpdateTextPosition = DoTypes.All; // Insert the text from the line into the nmew line. IInsertTextFromTextRangeCommand <TContext> insertTextCommand = controller.CreateInsertTextFromTextRangeCommand( new TextPosition((line + 1), CharacterPosition.Begin), new SingleLineTextRange( position.LinePosition, position.CharacterPosition, CharacterPosition.End)); // Delete the text from the current line. IDeleteTextCommand <TContext> deleteTextCommand = controller.CreateDeleteTextCommand( new SingleLineTextRange( line, position.CharacterPosition, CharacterPosition.End)); // Add the commands into the composite and indicate that the whitespace // command controls where the text position will end up. Commands.Add(insertLineCommand); Commands.Add(insertTextCommand); Commands.Add(deleteTextCommand); }
public JoinNextParagraphCommand( ITextEditingCommandController <TContext> controller, LinePosition line) : base(true, false) { // Joining a paragraph consists of inserting the text of the current // paragraph into the previous one with a space and then moving the // cursor to the end of the original first paragraph (and space). // Insert the text from the line into the prvious line. var joinedLine = new LinePosition(line); IInsertTextFromTextRangeCommand <TContext> insertCommand = controller.CreateInsertTextFromTextRangeCommand( new TextPosition(joinedLine, CharacterPosition.End), new SingleLineTextRange( (int)line + 1, CharacterPosition.Begin, CharacterPosition.End)); // Finally, delete the current line since we merged it. IDeleteLineCommand <TContext> deleteCommand = controller.CreateDeleteLineCommand((int)line + 1); // Add the commands into the composite and indicate that the whitespace // command controls where the text position will end up. Commands.Add(insertCommand); Commands.Add(deleteCommand); }
public JoinPreviousParagraphCommand( ITextEditingCommandController <TContext> controller, LinePosition line) : base(true, false) { // Establish our code contracts. if (line.Index <= 0) { throw new InvalidOperationException( "Cannot join the paragraph on the first line."); } // Joining a paragraph consists of inserting the text of the current // paragraph into the previous one with a space and then moving the // cursor to the end of the original first paragraph (and space). // Insert the text from the line into the prvious line. var joinedLine = new LinePosition((int)line - 1); IInsertTextFromTextRangeCommand <TContext> insertCommand = controller.CreateInsertTextFromTextRangeCommand( new TextPosition(joinedLine, CharacterPosition.End), new SingleLineTextRange( line, CharacterPosition.Begin, CharacterPosition.End)); insertCommand.UpdateTextPosition = DoTypes.All; // Finally, delete the current line since we merged it. IDeleteLineCommand <TContext> deleteCommand = controller.CreateDeleteLineCommand(line); deleteCommand.UpdateTextPosition = DoTypes.None; // Add the commands into the composite and indicate that the whitespace // command controls where the text position will end up. Commands.Add(insertCommand); Commands.Add(deleteCommand); }
/// <summary> /// Creates the command needed for the delete selection. /// </summary> /// <param name="controller"></param> /// <param name="displayContext"></param> /// <returns></returns> public static IUndoableCommand <OperationContext> CreateCommand( EditorViewController controller, IDisplayContext displayContext) { // Grab the selection and determine if we are a single line or // multiple line selection. IUndoableCommand <OperationContext> command; TextRange selection = displayContext.Caret.Selection; if (selection.IsSameLine) { IDeleteTextCommand <OperationContext> deleteCommand = controller.CommandController.CreateDeleteTextCommand( new SingleLineTextRange( selection.BeginTextPosition.LinePosition, selection.BeginTextPosition.CharacterPosition, selection.EndTextPosition.CharacterPosition)); deleteCommand.UpdateTextPosition = DoTypes.All; command = deleteCommand; } else { // We have a multiple line delete which requires some additional // processing since the core operation is a single line only. var compositeCommand = new CompositeCommand <OperationContext>(true, false); // Delete the text from the first line. IDeleteTextCommand <OperationContext> firstLineCommand = controller.CommandController.CreateDeleteTextCommand( new SingleLineTextRange( selection.BeginTextPosition.LinePosition, selection.BeginTextPosition.CharacterPosition, CharacterPosition.End)); firstLineCommand.UpdateTextPosition = DoTypes.All; compositeCommand.Commands.Add(firstLineCommand); // Insert the text from the last into into the first. IInsertTextFromTextRangeCommand <OperationContext> secondLineCommand = controller.CommandController.CreateInsertTextFromTextRangeCommand( selection.BeginTextPosition, new SingleLineTextRange( selection.EndTextPosition.LinePosition, selection.EndTextPosition.CharacterPosition, CharacterPosition.End)); compositeCommand.Commands.Add(secondLineCommand); // Delete all the lines between the two. int startLineIndex = selection.FirstLinePosition.GetLineIndex(displayContext.LineBuffer); int endLineIndex = selection.LastLinePosition.GetLineIndex(displayContext.LineBuffer); for (int lineIndex = endLineIndex; lineIndex > startLineIndex; lineIndex--) { IDeleteLineCommand <OperationContext> deleteLineCommand = controller.CommandController.CreateDeleteLineCommand(lineIndex); compositeCommand.Commands.Add(deleteLineCommand); } // Execute the composite command. command = compositeCommand; } // Return the resulting command. return(command); }