System clipboard

Usually, the copy/paste functionality involves system clipboard. NW.js provides an API to control it (http://docs.nwjs.io/en/latest/References/Clipboard/). Unfortunately, it's quite limited; we cannot transfer an arbitrary file between applications, which you may expect of a file manager. Yet, some things are still available to us.

Transferring text

In order to examine text transferring with the clipboard, we modify the method copy of FileService:

copy( file ){ 
    this.copiedFile = this.dir.getFile( file ); 
    const clipboard = nw.Clipboard.get(); 


    clipboard.set( this.copiedFile, "text" ); 
}

What does it do? As soon as we obtain the file full path, we create an instance of nw.Clipboard...