Editor Sample Project provides a [TypedHandlerDelegate][sdk:TypedHandlerDelegate] implementation, which inserts editor_basics on the top of the edited document any time user types a character. In addition, three actions are available in the Editor context menu:

Editor Replace Text - replaces the selected text with editor_basics,
Editor Add Caret - adds extra caret below the current one,
Caret Position - shows message dialog with information about the caret position.

Extension Points

Name	Implementation	Extension Point Class
`com.intellij.typedHandler`	MyTypedHandler	`TypedHandlerDelegate`

Reference: Plugin Extension Points in IntelliJ SDK Docs

Actions

ID	Implementation	Base Action Class
`EditorBasics.EditorIllustrationAction`	EditorIllustrationAction	`AnAction`
`EditorBasics.EditorHandlerIllustration`	EditorHandlerIllustration	`AnAction`
`EditorBasics.LogicalPositionIllustration`	EditorAreaIllustration	`AnAction`

Reference: Action System in IntelliJ SDK Docs