input_parser/auto_complete.go

@@ -0,0 +1,70 @@
+package input_parser
+
+var commandsTab []string
+var prevInput string
+var tabIndex int
+
+func AutoComplete(input string) string {
+
+	inputLength := len(input)
+
+	if inputLength == 0 {
+		return input
+	}
+
+	if tabIndex+2 > len(commandsTab) {
+		tabIndex = -1
+	}
+
+	if prevInput == input {
+		tabIndex = tabIndex + 1
+
+		prevInput = commandsTab[tabIndex]
+		return commandsTab[tabIndex]
+	}
+
+	prevInput = input
+	tabIndex = 0
+
+	currentCommands := []string{
+		"cat",
+		"cd",
+		"cp",
+		"echo",
+		"head",
+		"help",
+		"ls",
+		"man",
+		"mv",
+		"pwd",
+		"rm",
+		"tail",
+		"touch",
+	}
+
+	var commandsWorking []string
+
+	for _, currentCommand := range currentCommands {
+
+		if len(currentCommand) < inputLength {
+			continue
+		}
+
+		currentCommandWithoutEnd := currentCommand[:inputLength]
+
+		if currentCommandWithoutEnd != input {
+			continue
+		}
+
+		commandsWorking = append(commandsWorking, currentCommand)
+	}
+
+	commandsTab = commandsWorking
+
+	if len(commandsTab) == 0 {
+		return input
+	}
+
+	prevInput = commandsTab[0]
+	return commandsTab[0]
+}

input_parser/input_parser.go

@@ -96,7 +96,12 @@ func input_str(env *environment.Env) string {
 		case 4: // ^D
 			input = "exit"
 			goto loop_exit
-		case 27: // UPP
+
+		case 9: // Tab
+
+			input = AutoComplete(input)
+
+		case 27: // arrow?
 			if r, _, _ := reader.ReadRune(); r != 91 {
 				break
 			}
@@ -129,9 +134,12 @@ func input_str(env *environment.Env) string {
 		}
 		env.History[len(env.History)-1] = input
 		//fmt.Println(r_rune)
-		fmt.Print("\r\033[K")
+		fmt.Print("\r")
+		// fmt.Print("\r\033[K")
+
 		fmt.Print(env.Path)
 		fmt.Print(" > ")
+		fmt.Print("\033[K")
 		fmt.Print(input)
 	}
 loop_exit: