Action Composition

The main feature reaper-keys provides is the ability to compose actions of different types to create new commands.

How one can compose action types (i.e. the available action sequences) and their behaviour when joined is dependant on the mode of reaper-keys.

Take as an example the timeline motion type as well as the timeline operator type. In normal mode, any timeline motion may precede any timeline operator. When this action sequence is entered, it will result in the timeline operator being called on the timeline section between the cursor position before the motion and after the motion.

So one could enter sL, to create (s = "SelectItems", L = "NextMeasure"), and select the items up to the next measure.

There are various action types in reaper-keys.

Action Types

Action Type	Description
command	A generic command. Does not compose, accessible from every mode
timeline motion	Moves the edit cursor somewhere on the timeline
timeline selector	Sets the timeline selection
timeline operator	Executes a command that operates on the timeline selection
track motion	Changes the last touched track
track selector	Selects a track or multiple tracks
track operator	Executes a command that operates on a track selection
visual timeline command	A command only available in visual timeline mode
visual track command	A command only available in visual track mode

Check out the modes documentation to learn about how these types compose together.