components

806 B

1. // hl:proc — THE TERMINAL'S OWN INPUT as instance events, the Process pattern
2. // applied to fd 0:
3. //
4. // input = stdin()
5. // on input.line(text) { … } \\ one typed line, without its newline
6. // on input.eof() { … } \\ the terminal closed (Ctrl-D)
7. //
8. // A joined terminal realm (SPEC "Joining a realm") is what this exists for: the
9. // peer's entry reads lines here and `emit`s across the edge.
10. Number #srcId = 0
12. start() {
13. #srcId = __native("eventloop.register", __native("proc.stdin"), "__stdinEvent")
14. return this
15. }
17. on __stdinEvent(ev) {
18. if (ev.eof == true) {
19. // the closed terminal retires its source, so a program whose only
20. // source was the keyboard simply ends
21. __native("eventloop.unregister", #srcId)
22. emit eof()
23. return null
24. }
25. emit line(ev.line)
26. return null
27. }