Esempio n. 1
0
File: call.go Progetto: zhsj/elvish
// CallFn calls an Fn, displaying its outputs and possible errors as editor
// notifications. It is the preferred way to call a Fn while the editor is
// active.
func (ed *Editor) CallFn(fn eval.FnValue, args ...eval.Value) {
	if b, ok := fn.(*BuiltinFn); ok {
		// Builtin function: quick path.
		b.impl(ed)
		return
	}

	rout, chanOut, ports, err := makePorts()
	if err != nil {
		return
	}

	// Goroutines to collect output.
	var wg sync.WaitGroup
	wg.Add(2)
	go func() {
		rd := bufio.NewReader(rout)
		for {
			line, err := rd.ReadString('\n')
			if err != nil {
				break
			}
			ed.Notify("[bytes output] %s", line[:len(line)-1])
		}
		rout.Close()
		wg.Done()
	}()
	go func() {
		for v := range chanOut {
			ed.Notify("[value output] %s", v.Repr(eval.NoPretty))
		}
		wg.Done()
	}()

	// XXX There is no source to pass to NewTopEvalCtx.
	ec := eval.NewTopEvalCtx(ed.evaler, "[editor]", "", ports)
	ex := ec.PCall(fn, args, eval.NoOpts)
	if ex != nil {
		ed.Notify("function error: %s", ex.Error())
	}

	eval.ClosePorts(ports)
	wg.Wait()
	ed.refresh(true, true)
}
Esempio n. 2
0
func (c FnAsBoundFunc) Call(ed *Editor) {
	rout, chanOut, ports, err := makePorts()
	if err != nil {
		return
	}

	// Goroutines to collect output.
	var wg sync.WaitGroup
	wg.Add(2)
	go func() {
		rd := bufio.NewReader(rout)
		for {
			line, err := rd.ReadString('\n')
			if err != nil {
				break
			}
			// XXX notify is not concurrency-safe.
			ed.notify("[bound fn bytes] %s", line[:len(line)-1])
		}
		rout.Close()
		wg.Done()
	}()
	go func() {
		for v := range chanOut {
			ed.notify("[bound fn value] %s", v.Repr(eval.NoPretty))
		}
		wg.Done()
	}()

	// XXX There is no source to pass to NewTopEvalCtx.
	ec := eval.NewTopEvalCtx(ed.evaler, "[editor]", "", ports)
	ex := ec.PCall(c.Fn, []eval.Value{})
	if ex != nil {
		ed.notify("function error: %s", ex.Error())
	}

	eval.ClosePorts(ports)
	wg.Wait()
	ed.refresh(true, true)
}