info.magnolia.ui.mediaeditor.data

Class MediaStateImpl

java.lang.Object

info.magnolia.ui.mediaeditor.data.MediaStateImpl

All Implemented Interfaces:

MediaState

public class MediaStateImpl
extends Object
implements MediaState

Media State implementation that uses temporary files for maintaining a history of state changes of media opened in media editor. State tracking is done in both direction - state changes can undone and redone. Original state is stored in memory and the value can be rolled back to it.

Nested Class Summary

Nested classes/interfaces inherited from interface info.magnolia.ui.mediaeditor.data.MediaState

MediaState.Listener

Constructor Summary

Constructors

Constructor and Description
MediaStateImpl(byte[] value, info.magnolia.i18nsystem.SimpleTranslator i18n)

Method Summary

Modifier and Type	Method and Description
boolean	canRedoLastState()
boolean	canUndoLastState()
void	clearState() Clears modification history which erases all the tracked steps.
void	commitState() Propagate changes to the original media state.
protected void	endTransaction()
byte[]	getState()
void	performMediaModification(String actionName) Starts an action which will create a new state of the media opened in the media editor.
void	redoLastState() Redo last media state modification.
void	revertState() Roll back to original media state.
void	rollback()
void	setListener(MediaState.Listener listener)
void	setState(byte[] bytes)
void	startTransaction()
void	undoLastState() Undo last media state modification.

Methods inherited from class java.lang.Object

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

Constructor Detail

MediaStateImpl

public MediaStateImpl(byte[] value,
                      info.magnolia.i18nsystem.SimpleTranslator i18n)

Method Detail

startTransaction

public void startTransaction()

setListener

public void setListener(MediaState.Listener listener)

Specified by:

setListener in interface MediaState

clearState

public void clearState()

Description copied from interface: MediaState

Clears modification history which erases all the tracked steps. After this method call it will be impossible to undoLastState/redoLastState operations.

Specified by:

clearState in interface MediaState

performMediaModification

public void performMediaModification(String actionName)

Description copied from interface: MediaState

Starts an action which will create a new state of the media opened in the media editor.

Specified by:

performMediaModification in interface MediaState

Parameters:

actionName - the name of an action that performs the modification.

undoLastState

public void undoLastState()

Description copied from interface: MediaState

Undo last media state modification.

Specified by:

undoLastState in interface MediaState

canUndoLastState

public boolean canUndoLastState()

Specified by:

canUndoLastState in interface MediaState

Returns:

true, if any state modifications of media open in media editor exist

canRedoLastState

public boolean canRedoLastState()

Specified by:

canRedoLastState in interface MediaState

Returns:

true, if any undone action history exists

redoLastState

public void redoLastState()

Description copied from interface: MediaState

Redo last media state modification.

Specified by:

redoLastState in interface MediaState

revertState

public void revertState()

Description copied from interface: MediaState

Roll back to original media state.

Specified by:

revertState in interface MediaState

rollback

public void rollback()

getState

public byte[] getState()

Specified by:

getState in interface MediaState

Returns:

the current state of media in the media editor

commitState

public void commitState()

Description copied from interface: MediaState

Propagate changes to the original media state.

Specified by:

commitState in interface MediaState

setState

public void setState(byte[] bytes)

Specified by:

setState in interface MediaState

Parameters:

bytes - set the current state of the media to the newState.

endTransaction

protected void endTransaction()