func (fac FnAsArgCompleter) Complete(words []string, ed *Editor) ([]*candidate, error) {
in, err := makeClosedStdin()
if err != nil {
return nil, err
}
ports := []*eval.Port{in, &eval.Port{File: os.Stdout}, &eval.Port{File: os.Stderr}}
wordValues := make([]eval.Value, len(words))
for i, word := range words {
wordValues[i] = eval.String(word)
}
// XXX There is no source to pass to NewTopEvalCtx.
ec := eval.NewTopEvalCtx(ed.evaler, "[editor completer]", "", ports)
values, err := ec.PCaptureOutput(fac.Fn, wordValues)
if err != nil {
ed.notify("completer error: %v", err)
return nil, err
}
cands := make([]*candidate, len(values))
for i, v := range values {
s := eval.ToString(v)
cands[i] = &candidate{text: s}
}
return cands, nil
}
func callFnForCandidates(fn eval.FnValue, ev *eval.Evaler, args []string) ([]*candidate, error) {
ports := []*eval.Port{eval.DevNullClosedChan, &eval.Port{File: os.Stdout}, &eval.Port{File: os.Stderr}}
argValues := make([]eval.Value, len(args))
for i, arg := range args {
argValues[i] = eval.String(arg)
}
// XXX There is no source to pass to NewTopEvalCtx.
ec := eval.NewTopEvalCtx(ev, "[editor completer]", "", ports)
values, err := ec.PCaptureOutput(fn, argValues, eval.NoOpts)
if err != nil {
return nil, errors.New("completer error: " + err.Error())
}
cands := make([]*candidate, len(values))
for i, v := range values {
switch v := v.(type) {
case eval.String:
cands[i] = &candidate{text: string(v)}
case *candidate:
cands[i] = v
default:
return nil, errors.New("completer must output string or candidate")
}
}
return cands, nil
}
func (hv History) IndexOne(idx eval.Value) eval.Value {
hv.mutex.RLock()
defer hv.mutex.RUnlock()
slice, i, j := eval.ParseAndFixListIndex(eval.ToString(idx), hv.Len())
if slice {
cmds, err := hv.st.Cmds(i+1, j+1)
maybeThrow(err)
vs := make([]eval.Value, len(cmds))
for i := range cmds {
vs[i] = eval.String(cmds[i])
}
return eval.NewList(vs...)
}
s, err := hv.st.Cmd(i + 1)
maybeThrow(err)
return eval.String(s)
}
func complFilenameFn(ec *eval.EvalCtx, word string) {
cands, err := complFilenameInner(word, false)
maybeThrow(err)
out := ec.OutputChan()
for _, cand := range cands {
// TODO Preserve other parts of the candidate.
out <- eval.String(cand.text)
}
}
// makeModule builds a module from an Editor.
func makeModule(ed *Editor) eval.Namespace {
ns := eval.Namespace{}
// Populate builtins.
for _, b := range builtins {
ns[eval.FnPrefix+b.name] = eval.NewPtrVariable(&EditBuiltin{b, ed})
}
// Populate binding tables in the variable $binding.
// TODO Make binding specific to the Editor.
binding := map[eval.Value]eval.Value{
eval.String("insert"): BindingTable{keyBindings[modeInsert]},
eval.String("command"): BindingTable{keyBindings[modeCommand]},
eval.String("completion"): BindingTable{keyBindings[modeCompletion]},
eval.String("navigation"): BindingTable{keyBindings[modeNavigation]},
eval.String("history"): BindingTable{keyBindings[modeHistory]},
}
ns["binding"] = eval.NewPtrVariable(eval.NewMap(binding))
return ns
}
func (hv History) Iterate(f func(eval.Value) bool) {
hv.mutex.RLock()
defer hv.mutex.RUnlock()
n := hv.Len()
err := hv.st.IterateCmds(1, n+1, func(cmd string) bool {
return f(eval.String(cmd))
})
maybeThrow(err)
}
func (bt BindingTable) Index(idx eval.Value) eval.Value {
key := keyIndex(idx)
switch f := bt.inner[key].(type) {
case Builtin:
return eval.String(f.name)
case EvalCaller:
return f.Caller
}
throw(errors.New("bug"))
panic("unreachable")
}
func (ct CompleterTable) IndexOne(idx eval.Value) eval.Value {
head, ok := idx.(eval.String)
if !ok {
throw(ErrCompleterIndexMustBeString)
}
v := ct[string(head)]
if fac, ok := v.(FnAsArgCompleter); ok {
return fac.Fn
}
return eval.String("<get not implemented yet>")
}
// finishReadLine puts the terminal in a state suitable for other programs to
// use.
func (ed *Editor) finishReadLine(addError func(error)) {
ed.activeMutex.Lock()
defer ed.activeMutex.Unlock()
ed.active = false
ed.mode = &ed.insert
ed.tips = nil
ed.dot = len(ed.line)
if !ed.rpromptPersistent {
ed.rprompt = nil
}
addError(ed.refresh(false, false))
ed.file.WriteString("\n")
// ed.reader.Stop()
ed.reader.Quit()
// Turn on autowrap.
ed.file.WriteString("\033[?7h")
// Turn off mouse tracking.
//ed.file.WriteString("\033[?1000;1006l")
// Disable bracketed paste.
ed.file.WriteString("\033[?2004l")
// restore termios
err := ed.savedTermios.ApplyToFd(int(ed.file.Fd()))
if err != nil {
addError(fmt.Errorf("can't restore terminal attribute: %s", err))
}
ed.savedTermios = nil
line := ed.line
ed.editorState = editorState{}
afterReadLine := ed.afterReadLine.Get().(eval.ListLike)
if afterReadLine.Len() > 0 {
opfunc := func(ec *eval.EvalCtx) {
afterReadLine.Iterate(func(v eval.Value) bool {
fn := v.(eval.FnValue)
ex := ec.PCall(fn, []eval.Value{eval.String(line)}, eval.NoOpts)
// TODO Pretty print.
if ex != nil {
fmt.Fprintln(os.Stderr, "function error: %s", ex.Error())
}
return true
})
}
ed.evaler.Eval(eval.Op{opfunc, -1, -1}, "[after-readline]", "no source")
}
}
func complGetopt(ec *eval.EvalCtx, elemsv eval.IteratorValue, optsv eval.IteratorValue, argsv eval.IteratorValue) {
var (
elems []string
opts []*getopt.Option
args []eval.FnValue
variadic bool
)
desc := make(map[*getopt.Option]string)
// Convert arguments.
elemsv.Iterate(func(v eval.Value) bool {
elem, ok := v.(eval.String)
if !ok {
throwf("arg should be string, got %s", v.Kind())
}
elems = append(elems, string(elem))
return true
})
optsv.Iterate(func(v eval.Value) bool {
m, ok := v.(eval.MapLike)
if !ok {
throwf("opt should be map-like, got %s", v.Kind())
}
get := func(ks string) (string, bool) {
kv := eval.String(ks)
if !m.HasKey(kv) {
return "", false
}
vv := m.IndexOne(kv)
if vs, ok := vv.(eval.String); ok {
return string(vs), true
} else {
throwf("%s should be string, got %s", ks, vs.Kind())
panic("unreachable")
}
}
opt := &getopt.Option{}
if s, ok := get("short"); ok {
r, size := utf8.DecodeRuneInString(s)
if r == utf8.RuneError || size != len(s) {
throwf("short option should be exactly one rune, got %v", parse.Quote(s))
}
opt.Short = r
}
if s, ok := get("long"); ok {
opt.Long = s
}
if opt.Short == 0 && opt.Long == "" {
throwf("opt should have at least one of short and long forms")
}
if s, ok := get("desc"); ok {
desc[opt] = s
}
opts = append(opts, opt)
return true
})
argsv.Iterate(func(v eval.Value) bool {
sv, ok := v.(eval.String)
if ok {
if string(sv) == "..." {
variadic = true
return true
}
throwf("string except for ... not allowed as argument handler, got %s", parse.Quote(string(sv)))
}
arg, ok := v.(eval.FnValue)
if !ok {
throwf("argument handler should be fn, got %s", v.Kind())
}
args = append(args, arg)
return true
})
// TODO Configurable config
g := getopt.Getopt{opts, getopt.GNUGetoptLong}
_, parsedArgs, ctx := g.Parse(elems)
out := ec.OutputChan()
putShortOpt := func(opt *getopt.Option) {
c := &candidate{text: "-" + string(opt.Short)}
if d, ok := desc[opt]; ok {
c.display.text = c.text + " (" + d + ")"
}
out <- c
}
putLongOpt := func(opt *getopt.Option) {
c := &candidate{text: "--" + string(opt.Long)}
if d, ok := desc[opt]; ok {
c.display.text = c.text + " (" + d + ")"
}
out <- c
}
switch ctx.Type {
case getopt.NewOptionOrArgument, getopt.Argument:
// Find argument completer
var argCompl eval.FnValue
if len(parsedArgs) < len(args) {
argCompl = args[len(parsedArgs)]
} else if variadic {
argCompl = args[len(args)-1]
}
if argCompl != nil {
cands, err := callFnForCandidates(argCompl, ec.Evaler, []string{ctx.Text})
maybeThrow(err)
for _, cand := range cands {
out <- cand
}
}
// TODO Notify that there is no suitable argument completer
case getopt.NewOption:
for _, opt := range opts {
if opt.Short != 0 {
putShortOpt(opt)
}
if opt.Long != "" {
putLongOpt(opt)
}
}
case getopt.NewLongOption:
for _, opt := range opts {
if opt.Long != "" {
putLongOpt(opt)
}
}
case getopt.LongOption:
for _, opt := range opts {
if strings.HasPrefix(opt.Long, ctx.Text) {
putLongOpt(opt)
}
}
case getopt.ChainShortOption:
for _, opt := range opts {
if opt.Short != 0 {
// XXX loses chained options
putShortOpt(opt)
}
}
case getopt.OptionArgument:
}
}
// makeModule builds a module from an Editor.
func makeModule(ed *Editor) eval.Namespace {
ns := eval.Namespace{}
// Populate builtins.
for _, b := range builtins {
ns[eval.FnPrefix+b.name] = eval.NewPtrVariable(b)
}
// Populate binding tables in the variable $binding.
// TODO Make binding specific to the Editor.
binding := &eval.Struct{
[]string{"insert", "command", "completion", "navigation", "history"},
[]eval.Variable{
eval.NewRoVariable(BindingTable{keyBindings[modeInsert]}),
eval.NewRoVariable(BindingTable{keyBindings[modeCommand]}),
eval.NewRoVariable(BindingTable{keyBindings[modeCompletion]}),
eval.NewRoVariable(BindingTable{keyBindings[modeNavigation]}),
eval.NewRoVariable(BindingTable{keyBindings[modeHistory]}),
},
}
ns["binding"] = eval.NewRoVariable(binding)
ns["completer"] = eval.NewRoVariable(CompleterTable(argCompleter))
ns[eval.FnPrefix+"complete-getopt"] = eval.NewRoVariable(
// XXX Repr is "&le:complete-getopt" instead of "le:&complete-getopt"
&eval.BuiltinFn{"le:complete-getopt", eval.WrapFn(complGetopt)})
ns[eval.FnPrefix+"complete-files"] = eval.NewRoVariable(
&eval.BuiltinFn{"le:complete-filename", eval.WrapFn(complFilenameFn)})
ns["prompt"] = ed.ps1
ns["rprompt"] = ed.rps1
ns["rprompt-persistent"] = BoolExposer{&ed.rpromptPersistent}
ns["history"] = eval.NewRoVariable(History{&ed.historyMutex, ed.store})
ns["current-command"] = eval.MakeVariableFromCallback(
func(v eval.Value) {
if !ed.active {
throw(ErrEditorInactive)
}
if s, ok := v.(eval.String); ok {
ed.line = string(s)
ed.dot = len(ed.line)
} else {
throw(errMustBeString)
}
},
func() eval.Value { return eval.String(ed.line) },
)
ns["selected-file"] = eval.MakeRoVariableFromCallback(
func() eval.Value {
if !ed.active {
throw(ErrEditorInactive)
}
if ed.mode.Mode() != modeNavigation {
throw(errNotNav)
}
return eval.String(ed.navigation.current.selectedName())
},
)
ns["abbr"] = eval.NewRoVariable(eval.MapStringString(ed.abbreviations))
ns["before-readline"] = ed.beforeReadLine
ns["after-readline"] = ed.afterReadLine
ns[eval.FnPrefix+"styled"] = eval.NewRoVariable(&eval.BuiltinFn{"le:styled", eval.WrapFn(styledBuiltin)})
return ns
}
func (se StringExposer) Get() eval.Value {
return eval.String(*se.valuePtr)
}
func complGetopt(ec *eval.EvalCtx, elemsv eval.IteratorValue, optsv eval.IteratorValue, argsv eval.IteratorValue) {
var (
elems []string
opts []*getopt.Option
args []eval.FnValue
variadic bool
)
// Convert arguments.
elemsv.Iterate(func(v eval.Value) bool {
elem, ok := v.(eval.String)
if !ok {
throwf("arg should be string, got %s", v.Kind())
}
elems = append(elems, string(elem))
return true
})
optsv.Iterate(func(v eval.Value) bool {
m, ok := v.(eval.MapLike)
if !ok {
throwf("opt should be map-like, got %s", v.Kind())
}
opt := &getopt.Option{}
vshort := maybeIndex(m, eval.String("short"))
if vshort != nil {
sv, ok := vshort.(eval.String)
if !ok {
throwf("short option should be string, got %s", vshort.Kind())
}
s := string(sv)
r, size := utf8.DecodeRuneInString(s)
if r == utf8.RuneError || size != len(s) {
throwf("short option should be exactly one rune, got %v", parse.Quote(s))
}
opt.Short = r
}
vlong := maybeIndex(m, eval.String("long"))
if vlong != nil {
s, ok := vlong.(eval.String)
if !ok {
throwf("long option should be string, got %s", vlong.Kind())
}
opt.Long = string(s)
}
if vshort == nil && vlong == nil {
throwf("opt should have at least one of short and long as keys")
}
// TODO support &desc
opts = append(opts, opt)
return true
})
argsv.Iterate(func(v eval.Value) bool {
sv, ok := v.(eval.String)
if ok {
if string(sv) == "..." {
variadic = true
return true
}
throwf("string except for ... not allowed as argument handler, got %s", parse.Quote(string(sv)))
}
arg, ok := v.(eval.FnValue)
if !ok {
throwf("argument handler should be fn, got %s", v.Kind())
}
args = append(args, arg)
return true
})
// TODO Configurable config
g := getopt.Getopt{opts, getopt.GNUGetoptLong}
_, _, ctx := g.Parse(elems)
out := ec.OutputChan()
_ = variadic // XXX
switch ctx.Type {
case getopt.NewOptionOrArgument, getopt.Argument:
case getopt.NewOption:
for _, opt := range opts {
if opt.Short != 0 {
out <- eval.String("-" + string(opt.Short))
}
if opt.Long != "" {
out <- eval.String("--" + opt.Long)
}
}
case getopt.NewLongOption:
for _, opt := range opts {
if opt.Long != "" {
out <- eval.String("--" + opt.Long)
}
}
case getopt.LongOption:
for _, opt := range opts {
if strings.HasPrefix(opt.Long, ctx.Text) {
out <- eval.String("--" + opt.Long)
}
}
case getopt.ChainShortOption:
for _, opt := range opts {
if opt.Short != 0 {
// XXX loses chained options
out <- eval.String("-" + string(opt.Short))
}
}
case getopt.OptionArgument:
}
}