从终端读取 ANSI 转义 [英] Read ANSI escape from terminal

问题描述

维基百科文章关于终端 ANSI 转义码显示了一些可以发送到一个终端 AND 然后一些数据返回给应用程序.请举例说明如何发送代码，然后在 Node.js 应用程序中读取结果.

Wikipedia article on terminal ANSI escape codes shows some codes that could be sent to a terminal AND then some data is returned back to the application. Please provide an example how to send the code and then read the result in Node.js application.

例如这个转义序列:

CSI 6n |DSR – 设备状态报告

CSI 6n | DSR – Device Status Report

将光标位置 (CPR) 报告给应用程序(就像在键盘上输入一样)ESC[n;mR，其中 n 是行，m 是列.)

Reports the cursor position (CPR) to the application as (as though typed at the keyboard) ESC[n;mR, where n is the row and m is the column.)

我花了几个小时尝试使用 process.stdout、process.stdin、各种 fs.* 函数，甚至尝试从 /dev/tty 读取.一切都白费了，完全迷路了.

I spent hours trying to use process.stdout, process.stdin, various fs.* functions, even tried to read from /dev/tty. All in vain, got totally lost.

推荐答案

这是一种方法:

var util = require("util");

function dsr(callback) {
  process.stdin.setRawMode(true);
  process.stdin.once("data", function(data) {
    process.stdin.setRawMode(false);
    process.stdin.pause();
    callback(data.toString());
  });
  process.stdout.write("\x1b[6n");
}

dsr(function(data) {
  console.log(util.inspect(data));
});

输出:

'\u001b[30;1R'

我让 stdin 进入原始模式，这样结果就不会打印在终端中，并且无需用户按回车键即可读取结果.

I'm making stdin go into raw mode so that the result is not printed in the terminal and can be read without the user having to press return.

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