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authorFelix Lange <fjl@twurst.com>2016-02-15 21:56:26 +0800
committerFelix Lange <fjl@twurst.com>2016-02-15 22:03:26 +0800
commitae5bc89cad98a4fd3176502b66678d768f2fd15f (patch)
treeb1b590fbb8b47ea66d02b58c11f3355f61c19909 /jsre
parent2abf1a36b9e7941a53622c0b65ef23a4f03418af (diff)
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cmd/geth, jsre: improve auto-completion
Diffstat (limited to 'jsre')
-rw-r--r--jsre/completion.go63
1 files changed, 63 insertions, 0 deletions
diff --git a/jsre/completion.go b/jsre/completion.go
new file mode 100644
index 000000000..2fda6ef0d
--- /dev/null
+++ b/jsre/completion.go
@@ -0,0 +1,63 @@
+// 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]
+ }
+
+ res, err := vm.Eval(objRef)
+ if err != nil || !res.IsObject() {
+ return nil
+ }
+ for _, k := range res.Object().Keys() {
+ if strings.HasPrefix(k, prefix) {
+ if objRef == "this" {
+ results = append(results, k)
+ } else {
+ results = append(results, strings.Join(parts[:len(parts)-1], ".")+"."+k)
+ }
+ }
+ }
+ // e.g. web3<tab><tab> append dot since its an object
+ if lineRes, _ := vm.Eval(line); lineRes.IsObject() {
+ results = append(results, line+".")
+ }
+
+ sort.Strings(results)
+ return results
+}