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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package jsre
import (
"sort"
"strings"
"github.com/robertkrimen/otto"
)
// CompleteKeywords returns potential continuations for the given line. Since line is
// evaluated, callers need to make sure that evaluating line does not have side effects.
func (jsre *JSRE) CompleteKeywords(line string) []string {
var results []string
jsre.Do(func(vm *otto.Otto) {
results = getCompletions(vm, line)
})
return results
}
func getCompletions(vm *otto.Otto, line string) (results []string) {
parts := strings.Split(line, ".")
objRef := "this"
prefix := line
if len(parts) > 1 {
objRef = strings.Join(parts[0:len(parts)-1], ".")
prefix = parts[len(parts)-1]
}
obj, _ := vm.Object(objRef)
if obj == nil {
return nil
}
iterOwnAndConstructorKeys(vm, obj, func(k string) {
if strings.HasPrefix(k, prefix) {
if objRef == "this" {
results = append(results, k)
} else {
results = append(results, strings.Join(parts[:len(parts)-1], ".")+"."+k)
}
}
})
// Append opening parenthesis (for functions) or dot (for objects)
// if the line itself is the only completion.
if len(results) == 1 && results[0] == line {
obj, _ := vm.Object(line)
if obj != nil {
if obj.Class() == "Function" {
results[0] += "("
} else {
results[0] += "."
}
}
}
sort.Strings(results)
return results
}
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