67 lines
1.6 KiB
V
67 lines
1.6 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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// JS version
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// Need to be implemented
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// Will serve as more advanced input method
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// Based on the work of https://github.com/AmokHuginnsson/replxx
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module readline
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import os
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// Only use standard os.get_line
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// Need implementation for readline capabilities
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pub fn (mut r Readline) read_line_utf8(prompt string) ?ustring {
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r.current = ''.ustring()
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r.cursor = 0
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r.prompt = prompt
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r.search_index = 0
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if r.previous_lines.len <= 1 {
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r.previous_lines << ''.ustring()
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r.previous_lines << ''.ustring()
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}
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else {
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r.previous_lines[0] = ''.ustring()
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}
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print(r.prompt)
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r.current = os.get_raw_line().ustring()
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r.previous_lines[0] = ''.ustring()
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r.search_index = 0
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if r.current.s == '' {
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return error('empty line')
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}
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return r.current
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}
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// Returns the string from the utf8 ustring
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pub fn (mut r Readline) read_line(prompt string) ?string {
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s := r.read_line_utf8(prompt) or {
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return error(err)
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}
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return s.s
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}
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// Standalone function without persistent functionnalities (eg: history)
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// Returns utf8 based ustring
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pub fn read_line_utf8(prompt string) ?ustring {
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mut r := Readline{}
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s := r.read_line_utf8(prompt) or {
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return error(err)
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}
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return s
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}
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// Standalone function without persistent functionnalities (eg: history)
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// Return string from utf8 ustring
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pub fn read_line(prompt string) ?string {
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mut r := Readline{}
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s := r.read_line(prompt) or {
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return error(err)
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}
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return s
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}
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