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70 lines
1.7 KiB
70 lines
1.7 KiB
13 years ago
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module.exports = prompt
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var log = require("./log.js")
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, buffer = ""
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, tty = require("tty")
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function prompt (p, def, silent, cb) {
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if (!cb) cb = silent, silent = false
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if (!cb) cb = def, def = null
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if (def) p += "("+(silent ? "<hidden>" : def)+") "
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var r = (silent ? silentRead : read).bind(null, def, cb)
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if (!process.stdout.write(p)) process.stdout.on("drain", function D () {
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process.stdout.removeListener("drain", D)
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r()
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})
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else r()
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}
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function read (def, cb) {
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var stdin = process.openStdin()
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, val = ""
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stdin.resume()
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stdin.setEncoding("utf8")
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stdin.on("error", cb)
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stdin.on("data", function D (chunk) {
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val += buffer + chunk
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buffer = ""
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val = val.replace(/\r/g, '')
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if (val.indexOf("\n") !== -1) {
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if (val !== "\n") val = val.replace(/^\n+/, "")
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buffer = val.substr(val.indexOf("\n"))
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val = val.substr(0, val.indexOf("\n"))
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stdin.pause()
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stdin.removeListener("data", D)
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stdin.removeListener("error", cb)
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val = val.trim() || def
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cb(null, val)
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}
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})
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}
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function silentRead (def, cb) {
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var stdin = process.openStdin()
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, val = ""
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tty.setRawMode(true)
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stdin.resume()
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stdin.on("error", cb)
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stdin.on("data", function D (c) {
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c = "" + c
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switch (c) {
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case "\n": case "\r": case "\r\n": case "\u0004":
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tty.setRawMode(false)
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stdin.removeListener("data", D)
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stdin.removeListener("error", cb)
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val = val.trim() || def
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process.stdout.write("\n")
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stdin.pause()
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return cb(null, val)
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case "\u0003": case "\0":
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return cb("cancelled")
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break
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default:
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val += buffer + c
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buffer = ""
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break
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}
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})
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}
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