// 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)
}
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)
}