github.com/klaytn/klaytn@v1.10.2/console/jsre/completion.go (about)

     1  // Modifications Copyright 2018 The klaytn Authors
     2  // Copyright 2016 The go-ethereum Authors
     3  // This file is part of the go-ethereum library.
     4  //
     5  // The go-ethereum library is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Lesser General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // The go-ethereum library is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  // GNU Lesser General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Lesser General Public License
    16  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    17  //
    18  // This file is derived from internal/jsre/completion.go (2018/06/04).
    19  // Modified and improved for the klaytn development.
    20  
    21  package jsre
    22  
    23  import (
    24  	"sort"
    25  	"strings"
    26  
    27  	"github.com/robertkrimen/otto"
    28  )
    29  
    30  // CompleteKeywords returns potential continuations for the given line. Since line is
    31  // evaluated, callers need to make sure that evaluating line does not have side effects.
    32  func (jsre *JSRE) CompleteKeywords(line string) []string {
    33  	var results []string
    34  	jsre.Do(func(vm *otto.Otto) {
    35  		results = getCompletions(vm, line)
    36  	})
    37  	return results
    38  }
    39  
    40  func getCompletions(vm *otto.Otto, line string) (results []string) {
    41  	parts := strings.Split(line, ".")
    42  	objRef := "this"
    43  	prefix := line
    44  	if len(parts) > 1 {
    45  		objRef = strings.Join(parts[0:len(parts)-1], ".")
    46  		prefix = parts[len(parts)-1]
    47  	}
    48  
    49  	obj, _ := vm.Object(objRef)
    50  	if obj == nil {
    51  		return nil
    52  	}
    53  	iterOwnAndConstructorKeys(vm, obj, func(k string) {
    54  		if strings.HasPrefix(k, prefix) {
    55  			if objRef == "this" {
    56  				results = append(results, k)
    57  			} else {
    58  				results = append(results, strings.Join(parts[:len(parts)-1], ".")+"."+k)
    59  			}
    60  		}
    61  	})
    62  
    63  	// Append opening parenthesis (for functions) or dot (for objects)
    64  	// if the line itself is the only completion.
    65  	if len(results) == 1 && results[0] == line {
    66  		obj, _ := vm.Object(line)
    67  		if obj != nil {
    68  			if obj.Class() == "Function" {
    69  				results[0] += "("
    70  			} else {
    71  				results[0] += "."
    72  			}
    73  		}
    74  	}
    75  
    76  	sort.Strings(results)
    77  	return results
    78  }