DeleteTextCommand

java.lang.Object

fr.istic.aco.editor.commands.DeleteTextCommand

All Implemented Interfaces:: Command, CommandOriginator, Originator

public class DeleteTextCommand extends Object implements CommandOriginator

The DeleteTextCommand class implements the functionality for deleting the currently selected text.

Constructor Summary

Constructors

Constructor

Description

DeleteTextCommand(Engine engine, Recorder recorder, UndoManager undoManager)

Constructs a DeleteTextCommand with the specified dependencies.
Method Summary

Modifier and Type

Method

Description

void

execute()

Executes the command by deleting the selected text.

EngineMemento

getMemento()

Returns null since this command does not require saving state for the Memento pattern.

void

setMemento(Memento memento)

Does nothing since there is no state to restore for this command.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- DeleteTextCommand
  
  public DeleteTextCommand(Engine engine, Recorder recorder, UndoManager undoManager)
  
  Constructs a DeleteTextCommand with the specified dependencies.
  
  Parameters:
  
  engine - the text editing engine responsible for text editing actions
  
  recorder - the command recorder for saving and replaying the command
  
  undoManager - the undo manager for handling undo and redo functionality
Method Details
- getMemento
  
  public EngineMemento getMemento()
  
  Returns null since this command does not require saving state for the Memento pattern.
  
  Specified by:
  
  getMemento in interface Originator
  
  Returns:
  
  always null, as this command does not save state
- setMemento
  
  public void setMemento(Memento memento)
  
  Does nothing since there is no state to restore for this command.
  
  Specified by:
  
  setMemento in interface Originator
  
  Parameters:
  
  memento - the memento object (ignored)
- execute
  
  public void execute()
  
  Executes the command by deleting the selected text.
  Before executing, the current state of the Engine is stored in the UndoManager as a memento. The command is also saved in the Recorder for replay functionality.
  
  Specified by:
  
  execute in interface Command