MediaState (Magnolia UI (parent) 6.2.1 API)

All Known Implementing Classes:

MediaStateImpl
```
public interface MediaState
```
Interface that maintains the state of media currently open in media editor. Additionally, the state of undoLastState and redoLastState operations performed to undoLastState/redoLastState previous state modification is maintained. The original value is buffered and the state can always be rolled back to it.

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static interface MediaState.Listener
Listener interface that receives important information about the media state workflow.

Nested Classes
Modifier and Type	Interface and Description
`static interface`	`MediaState.Listener` Listener interface that receives important information about the media state workflow.

Method Summary

All Methods Instance Methods Abstract Methods
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.
`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`	`setListener(MediaState.Listener listener)`
`void`	`setState(byte[] newState)`
`void`	`undoLastState()` Undo last media state modification.

- Method Detail
  - setListener
```
void setListener(MediaState.Listener listener)
```
  - clearState
```
void clearState()
```
    Clears modification history which erases all the tracked steps. After this method call it will be impossible to undoLastState/redoLastState operations.
  - performMediaModification
```
void performMediaModification(String actionName)
```
    Starts an action which will create a new state of the media opened in the media editor.
    
    Parameters:
    
    actionName - the name of an action that performs the modification.
  - undoLastState
```
void undoLastState()
            throws ActionExecutionException
```
    Undo last media state modification.
    
    Throws:
    
    ActionExecutionException
  - canUndoLastState
```
boolean canUndoLastState()
```
    Returns:
    
    true, if any state modifications of media open in media editor exist
  - canRedoLastState
```
boolean canRedoLastState()
```
    Returns:
    
    true, if any undone action history exists
  - redoLastState
```
void redoLastState()
            throws ActionExecutionException
```
    Redo last media state modification.
    
    Throws:
    
    ActionExecutionException
  - commitState
```
void commitState()
```
    Propagate changes to the original media state.
  - revertState
```
void revertState()
```
    Roll back to original media state.
  - getState
```
byte[] getState()
```
    Returns:
    
    the current state of media in the media editor
  - setState
```
void setState(byte[] newState)
```
    Parameters:
    
    newState - set the current state of the media to the newState.

Interface MediaState

Nested Class Summary

Method Summary

Method Detail

setListener

clearState

performMediaModification

undoLastState

canUndoLastState

canRedoLastState

redoLastState

commitState

revertState

getState

setState