Class MoveSelection

java.lang.Object

fr.istic.aco.editor.commands.MoveSelection

All Implemented Interfaces:

Command, CommandOriginator, Originator

public class MoveSelection
extends Object
implements CommandOriginator

The MoveSelection class implements the functionality for selecting the text within the interval

Constructor Summary

Constructors

Constructor	Description
MoveSelection(Engine engine, Invoker invoker, Recorder recorder, UndoManager undoManager)	Constructs a MoveSelection with the specified dependencies.

Method Summary

Modifier and Type	Method	Description
void	execute()	Executes the command to update the text selection range.
Memento	getMemento()	Creates and returns a memento representing the current state of the selection command.
void	setMemento(Memento memento)	Restores the state of the command from the provided memento.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

MoveSelection

public MoveSelection(Engine engine,
 Invoker invoker,
 Recorder recorder,
 UndoManager undoManager)

Constructs a MoveSelection with the specified dependencies.

Parameters:

engine - the text editing engine responsible for text editing actions

invoker - the invoker object that provides the text to be inserted

recorder - the command recorder for saving and replaying the command

undoManager - the undo manager for handling undo and redo functionality

Method Details

getMemento

public Memento getMemento()

Creates and returns a memento representing the current state of the selection command.

The memento stores the beginning and ending indices of the selection range, which are retrieved from the Invoker.

Specified by:

getMemento in interface Originator

Returns:

a memento containing the selection range (beginning and ending indices)

setMemento

public void setMemento(Memento memento)

Restores the state of the command from the provided memento.

The beginning and ending indices stored in the memento are restored to the Invoker.

Specified by:

setMemento in interface Originator

Parameters:

memento - the memento object containing the state to restore

execute

public void execute()

Executes the command to update the text selection range.

This method performs the following steps:

• Saves the current state of the Engine in the UndoManager to enable undo functionality.
• Updates the selection range using the beginning and ending indices provided by the Invoker.
• Records the command in the Recorder for replay functionality.

Specified by:

execute in interface Command