add file completion to search

Related #150

complete.go

@@ -321,6 +321,44 @@ func completeCmd(acc []rune) (matches []string, longestAcc []rune) {
 	return
 }
 
+func completeFile(acc []rune) (matches []string, longestAcc []rune) {
+	s := string(acc)
+
+	wd, err := os.Getwd()
+	if err != nil {
+		log.Printf("getting current directory: %s", err)
+	}
+
+	files, err := ioutil.ReadDir(wd)
+	if err != nil {
+		log.Printf("reading directory: %s", err)
+	}
+
+	var longest string
+
+	for _, f := range files {
+		if !strings.HasPrefix(f.Name(), s) {
+			continue
+		}
+
+		matches = append(matches, f.Name())
+
+		if longest != "" {
+			longest = matchLongest(longest, f.Name())
+		} else if s != "" {
+			longest = f.Name()
+		}
+	}
+
+	if longest == "" {
+		longest = s
+	}
+
+	longestAcc = []rune(longest)
+
+	return
+}
+
 func completeShell(acc []rune) (matches []string, longestAcc []rune) {
 	s := string(acc)
 	f := tokenize(s)

eval.go

@@ -839,10 +839,15 @@ func (e *callExpr) eval(app *app, args []string) {
 		app.ui.cmdPrefix = ""
 	case "cmd-complete":
 		var matches []string
-		if app.ui.cmdPrefix == ":" {
+		switch app.ui.cmdPrefix {
+		case ":":
 			matches, app.ui.cmdAccLeft = completeCmd(app.ui.cmdAccLeft)
-		} else {
+		case "/", "?":
+			matches, app.ui.cmdAccLeft = completeFile(app.ui.cmdAccLeft)
+		case "$", "%", "!", "&":
 			matches, app.ui.cmdAccLeft = completeShell(app.ui.cmdAccLeft)
+		default:
+			return
 		}
 		app.ui.draw(app.nav)
 		if len(matches) > 1 {