public PasteCommand(
ITextEditingCommandController <TContext> controller,
TextPosition position,
string text)
: base(true, false)
{
// Split the clipboard text into different lines.
string[] lines = text.Split('\n');
// If we have only one line, then we just insert the command.
if (lines.Length == 1)
{
IInsertTextCommand <TContext> singleCommand =
controller.CreateInsertTextCommand(position, text);
singleCommand.UpdateTextPosition = DoTypes.All;
Commands.Add(singleCommand);
return;
}
// Start by splitting the first paragraph at that position.
var splitCommand = new SplitParagraphCommand <TContext>(controller, position);
Commands.Add(splitCommand);
// The first line is inserted into at the position.
IInsertTextCommand <TContext> firstCommand =
controller.CreateInsertTextCommand(position, lines[0]);
firstCommand.UpdateTextPosition = DoTypes.All;
Commands.Add(firstCommand);
// Loop through and add all the blank lines we'll need for the paste
// operation.
for (int i = 2;
i < lines.Length;
i++)
{
IInsertLineCommand <TContext> lineCommand =
controller.CreateInsertLineCommand((int)position.LinePosition + 1);
Commands.Add(lineCommand);
}
// For every other line, we add the line and paste it.
for (int i = 1;
i < lines.Length;
i++)
{
IInsertTextCommand <TContext> textCommand =
controller.CreateInsertTextCommand(
new TextPosition((int)position.LinePosition + i, CharacterPosition.Begin),
lines[i]);
textCommand.UpdateTextPosition = DoTypes.DoAndRedo;
Commands.Add(textCommand);
}
}
protected override void Do(
object context,
CommandFactoryManager <OperationContext> commandFactory,
object commandData,
OperationContext operationContext,
EditorViewController controller,
IDisplayContext displayContext,
TextPosition position)
{
// If we don't have a selection, this is a simple insert command.
TextPosition bufferPosition = displayContext.Caret.Position;
TextRange selection = displayContext.Caret.Selection;
if (!selection.IsEmpty)
{
// Create and execute the delete command. We do this separately
// so they show up as a different undo item.
IUndoableCommand <OperationContext> deleteCommand =
DeleteSelectionCommandFactory.CreateCommand(controller, displayContext);
controller.CommandController.Do(deleteCommand, operationContext);
// We have to reset the position so the insert happens as if
// the text doesn't exist.
bufferPosition = selection.FirstTextPosition;
operationContext = new OperationContext(
operationContext.LineBuffer, bufferPosition);
}
// Create the insert command using the (potentially) modified selection.
string text = commandData.ToString();
IInsertTextCommand <OperationContext> insertCommand =
controller.CommandController.CreateInsertTextCommand(bufferPosition, text);
insertCommand.UpdateTextPosition = DoTypes.All;
controller.CommandController.Do(insertCommand, operationContext);
// If we have a text position, we need to set it.
if (operationContext.Results.HasValue)
{
displayContext.Caret.SetAndScrollToPosition(
operationContext.Results.Value.TextPosition);
}
}
