# IActionMarkupHandler

Interface in [Yarn.Unity](/3.1/api/csharp/yarn.unity.md)

## Summary

A [IActionMarkupHandler](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler.md) is an object that reacts to the delivery of a line of dialogue, and can optionally control the timing of that delivery.

```csharp
public interface IActionMarkupHandler
```

## Remarks

There are a number of cases where a line's delivery needs to have its timing controlled. For example, [PauseEventProcessor](/3.1/api/csharp/yarn.unity/yarn.unity.pauseeventprocessor.md) adds a small delay between each character, creating a 'typewriter' effect as each letter appears over time.

Another example of a [IActionMarkupHandler](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler.md) is an in-line event or animation, such as causing a character to play an animation (and waiting for that animation to complete before displaying the rest of the line).

## Methods

| Name                                                                                                                                                                                  | Description                                                                          |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ |
| [OnCharacterWillAppear(int,MarkupParseResult,CancellationToken)](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler/yarn.unity.iactionmarkuphandler.oncharacterwillappear.md) | Called repeatedly for each visible character in the line.                            |
| [OnLineDisplayBegin(MarkupParseResult,TMP\_Text)](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler/yarn.unity.iactionmarkuphandler.onlinedisplaybegin.md)                   | Called immediately before the first character in the line is presented.              |
| [OnLineDisplayComplete()](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler/yarn.unity.iactionmarkuphandler.onlinedisplaycomplete.md)                                        | Called after the last call to `PresentCharacter(int, TMP_Text, CancellationToken)` . |
| [OnLineWillDismiss()](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler/yarn.unity.iactionmarkuphandler.onlinewilldismiss.md)                                                | Called right before the line will dismiss itself.                                    |
| [OnPrepareForLine(MarkupParseResult,TMP\_Text)](/3.1/api/csharp/yarn.unity/yarn.unity.iactionmarkuphandler/yarn.unity.iactionmarkuphandler.onprepareforline.md)                       | Called when the line view receives the line, to prepare for showing the line.        |


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