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|
package repl
import (
"regexp"
"strings"
"github.com/robertkrimen/otto"
)
type autoCompleter struct {
vm *otto.Otto
}
var lastExpressionRegex = regexp.MustCompile(`[a-zA-Z0-9]([a-zA-Z0-9\.]*[a-zA-Z0-9])?\.?$`)
func (a *autoCompleter) Do(line []rune, pos int) ([][]rune, int) {
lastExpression := lastExpressionRegex.FindString(string(line))
bits := strings.Split(lastExpression, ".")
first := bits[:len(bits)-1]
last := bits[len(bits)-1]
var l []string
if len(first) == 0 {
c := a.vm.Context()
l = make([]string, len(c.Symbols))
i := 0
for k := range c.Symbols {
l[i] = k
i++
}
} else {
r, err := a.vm.Eval(strings.Join(bits[:len(bits)-1], "."))
if err != nil {
return nil, 0
}
if o := r.Object(); o != nil {
for _, v := range o.KeysByParent() {
l = append(l, v...)
}
}
}
var r [][]rune
for _, s := range l {
if strings.HasPrefix(s, last) {
r = append(r, []rune(strings.TrimPrefix(s, last)))
}
}
return r, len(last)
}
|
