func startCompletion(ed *Editor, k Key) *leReturn {
c := &completion{}
ctx, err := parse.Complete("<completion>", ed.line[:ed.dot])
if err != nil {
ed.pushTip("parser error")
return nil
}
compound, start, err := peekCurrentCompound(ctx, ed.dot)
if err != nil {
ed.pushTip("cannot complete :(")
return nil
}
switch ctx.Typ {
case parse.CommandContext:
// BUG(xiaq): When completing, CommandContext is not supported
ed.pushTip("command context not yet supported :(")
case parse.NewArgContext, parse.ArgContext:
// BUG(xiaq): When completing, [New]ArgContext is treated like RedirFilenameContext
fallthrough
case parse.RedirFilenameContext:
// BUG(xiaq): When completing, only plain expressions are supported
names, err := fileNames(".")
if err != nil {
ed.pushTip(err.Error())
return nil
}
c.start = start
c.end = ed.dot
// BUG(xiaq) When completing, completion.typ is always ItemBare
c.typ = parse.ItemBare
c.candidates = findCandidates(compound, names)
if len(c.candidates) > 0 {
// TODO(xiaq): Support completions other than filename completion
for _, c := range c.candidates {
c.attr = defaultLsColor.determineAttr(c.text)
}
ed.completion = c
ed.mode = modeCompletion
} else {
ed.pushTip(fmt.Sprintf("No completion for %s", compound))
}
}
return nil
}
func startCompletion(ed *Editor, k Key) *leReturn {
c := &completion{}
ctx, err := parse.Complete("<completion>", ed.line[:ed.dot])
if err != nil {
ed.pushTip("parser error: " + err.Error())
return nil
}
compound, start, err := peekCurrentCompound(ctx, ed.dot)
if err != nil {
ed.pushTip("cannot complete: " + err.Error())
return nil
}
var findAll func() ([]string, error)
var makeCandidates func([]string) []*candidate
switch ctx.Typ {
case parse.CommandContext:
// BUG(xiaq): When completing commands, only builtins are searched
findAll = func() ([]string, error) {
return builtins, nil
}
makeCandidates = func(all []string) (cands []*candidate) {
return prefixMatchCandidates(compound, all)
}
case parse.NewArgContext, parse.ArgContext:
// BUG(xiaq): When completing, [New]ArgContext is treated like RedirFilenameContext
fallthrough
case parse.RedirFilenameContext:
// BUG(xiaq): File name completion does not deal with meta characters.
// Assume that compound is an incomplete filename
dir, file := path.Split(compound)
findAll = func() ([]string, error) {
if dir == "" {
return fileNames(".")
}
return fileNames(dir)
}
makeCandidates = func(all []string) (cands []*candidate) {
// Make candidates out of elements that match the file component.
for _, s := range all {
if strings.HasPrefix(s, file) {
cand := newCandidate()
cand.push(tokenPart{compound, false})
cand.push(tokenPart{s[len(file):], true})
cand.attr = defaultLsColor.determineAttr(cand.text)
cands = append(cands, cand)
}
}
return
}
}
// BUG(xiaq): When completing, only plain expressions are supported
all, err := findAll()
if err != nil {
ed.pushTip(err.Error())
return nil
}
c.start = start
c.end = ed.dot
// BUG(xiaq) When completing, completion.typ is always ItemBare
c.typ = parse.ItemBare
c.candidates = makeCandidates(all)
if len(c.candidates) > 0 {
ed.completion = c
ed.mode = modeCompletion
} else {
ed.pushTip(fmt.Sprintf("No completion for %s", compound))
}
return nil
}