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# BETextInputDelegate

A delegate protocol that a browser text view uses to notify the text system of changes.

```
protocol BETextInputDelegate
```

## Overview

You don’t conform to `BETextInputDelegate` in your classes, or implement its methods.
The system creates objects that conform to this protocol and sets them as the [`asyncInputDelegate`](/documentation/BrowserEngineKit/BETextInput/asyncInputDelegate) on your browser’s custom text views.

## Topics

### Text selection

[`selectionWillChange(for:)`](/documentation/BrowserEngineKit/BETextInputDelegate/selectionWillChange(for:))

Tells the system when the selection is about to change in the document.

[`selectionDidChange(for:)`](/documentation/BrowserEngineKit/BETextInputDelegate/selectionDidChange(for:))

Tells the system when the selection has changed in the document.

### Deferring actions to the text system

[`shouldDeferEventHandlingToSystem(for:context:)`](/documentation/BrowserEngineKit/BETextInputDelegate/shouldDeferEventHandlingToSystem(for:context:))

Notify the text system that your web browser’s custom text view isn’t handling key events.

[`textInput(_:deferReplaceTextActionToSystem:)`](/documentation/BrowserEngineKit/BETextInputDelegate/textInput(_:deferReplaceTextActionToSystem:))

Defers a replace text action to the ssytem.

### Providing completion suggestions

[`textInput(_:setCandidateSuggestions:)`](/documentation/BrowserEngineKit/BETextInputDelegate/textInput(_:setCandidateSuggestions:))

Provides text suggestions to the system.

### Removing stored context information

[`invalidateTextEntryContext(for:)`](/documentation/BrowserEngineKit/BETextInputDelegate/invalidateTextEntryContext(for:))

Tells the system the text entry context has changed and that text entry UI’s need to be refreshed.


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