class OutputDock : SimpleComponent() {

    override meth register() {
        if (settings().enableOutputDock && findDock("Output") == null) {
            OutputDockBehaviour().dockBehaviour( Side.BOTTOM, false )
        }
    }

}

class OutputDockBehaviour : TextBehaviour( "Output" ) {

    val clear = Action( "Clear", this:>clear2 )
        .icon("clean")

    val scrollWith = boolProperty( "Scroll with output", true )
        .icon( "scroll_with" )

    val streamer = PrintToTextBehaviour(this)

    init {
        iconName = "output"
        showLineNumbers = false
        disableHistory()
        scrollWith.listen( this:>changedScrollWith )
    }

    meth changedScrollWith() {
        streamer.scrollWithOutput = scrollWith.value
    }

    // Feature Bug. Function types cannot access methods in super class.
    meth clear2() {
        clear()
    }

    override meth toolbar() = listOf<Feature>( spacer, spacer, scrollWith, clear )

    override meth attached( container : Container ) {
        super.attached(container)
        streamer.captureOut()
        streamer.captureErr()
    }

    override meth detached() {
        super.detached()
        streamer.restoreOut()
        streamer.restoreErr()
    }

}