Expose clearScreen on LineReader

[sualeh]

Expose clearScreen on LineReader so that it is generally useful. Or, implement it on Terminal - if that makes more sense.

[gnodet]

You could use

lineReader.callWidget(LineReader.CLEAR_SCREEN);

[sualeh]

@gnodet - thanks - let me try that.

[sualeh]

@gnodet - I get an exception: Widgets can only be called during a readLine call

[mattirn]

In general I think that we should not expose methods (neither in LineReaderImpl) that implements widgets but they should be executed by using callWidget() method. Maybe we can implement a method executeWidget() that could be used outside of readerLine call to invoke widgets:

    public void executeWidget(String name) {
        String keyseq = alt(ctrl('W'));
        getKeyMaps().get(LineReader.MAIN).bind(new Reference(name), keyseq);
        runMacro(keyseq);
    }

[sualeh]

Thanks. If you could do that, it would be great. I know too little about jline3 to help with a PR.

[gnodet]

@sualeh the ReadLineImpl.clearScreen() aims at cleaning and redrawing the screen during a readLine() call. if you simply want to clear the screen, you can simply call

terminal.puts(Capability.clear_screen);

[sualeh]

Thanks, @gnodet