Module: Thaum::Suspender

Defined in:
lib/thaum/run_loop.rb

Overview

Handles a dequeued :suspend sentinel: tear the terminal down, actually stop the process, then on resume re-setup, repartition with current size, and force a re-render. Drains stray sentinels that arrive between teardown and resume. Internal — not delivered to App handlers per the spec.

Class Method Summary collapse

Class Method Details

.drain_until_resume(queue:) ⇒ Object 



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# File 'lib/thaum/run_loop.rb', line 173

def drain_until_resume(queue:)
  loop do
    msg = queue.pop
    break if msg == :resume
    # Ignore everything else during the suspended window — we
    # re-render from scratch on resume anyway.
  end
end

.suspend(app:, terminal:, queue:) ⇒ Object 



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# File 'lib/thaum/run_loop.rb', line 153

def suspend(app:, terminal:, queue:)
  Thaum.safe_invoke("Terminal#teardown(suspend)") { terminal.teardown }

  # Reset TSTP to default so kill("TSTP", pid) actually stops us.
  prev_tstp = Signal.trap("TSTP", "DEFAULT")
  Process.kill("TSTP", Process.pid)
  # ── process is stopped here; resumes when shell sends SIGCONT ──
  Signal.trap("TSTP", prev_tstp)

  drain_until_resume(queue:)

  Thaum.safe_invoke("Terminal#setup(resume)") { terminal.setup }
  cols, rows = terminal.size
  Thaum.safe_invoke("App#run_partition(resume)") do
    app.run_partition(rect: Rect.new(x: 0, y: 0, width: cols, height: rows))
  end
  app.request_render
  [cols, rows]
end