watch_screen

Take the entry read of pane's visible screen, call f(screen) with a ScreenWatch and return its value. Keys sent inside f cannot be counted as already on the entry screen, so a block can act and then wait:

watch_screen(f, server::Server, pane::PaneRef; interval=0.1, timeout=5.0,
             cancel=nothing)

watch_screen(server, pane) do screen
    send_keys(server, pane, "echo ready", "Enter")
    wait_for_text(screen, "ready")
end

timeout is one total deadline from the entry read, shared by every wait in the block; interval is the pause between reads. cancel is a CancellationToken . Every wait in the block counts against the entry read taken when the block opened, so repeat the same text only with a new watch_screen . The entry read raises ScreenWaitEnded when the pane or server is already gone. A pane from another server, or from an earlier generation of this one, raises CrossServerReference or StaleReference . The handle is not valid after f returns.