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Mini Shell
Mini Shell
/**
* Spinner
* Handle TTY and non-TTY based terminals
*/
var defaultSpinnerString = [
"⠋",
"⠙",
"⠹",
"⠸",
"⠼",
"⠴",
"⠦",
"⠧",
"⠇",
"⠏"
].join('');
var InteractiveSpinner = function(textToShow){
this.text = textToShow || '';
this.setSpinnerString(defaultSpinnerString); // use default spinner string
};
InteractiveSpinner.setDefaultSpinnerString = function(value) {
defaultSpinnerString = value;
};
InteractiveSpinner.prototype.start = function() {
var current = 0;
var self = this;
this.id = setInterval(function() {
try {
process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write(self.chars[current] + ' ' + self.text);
current = ++current % self.chars.length;
} catch(e) { // ignore error if term is not tty, just display nothing
}
}, 80);
};
InteractiveSpinner.prototype.setSpinnerString = function(str) {
this.chars = str.split("");
};
InteractiveSpinner.prototype.stop = function() {
try {
process.stdout.clearLine();
process.stdout.cursorTo(0);
} catch(e) {}
clearInterval(this.id);
};
/**
* Display dots if non TTY terminal
*/
var StaticSpinner = function(text) {
console.log(text);
}
StaticSpinner.prototype.start = function() {
this.interval = setInterval(function() {
process.stdout.write('.');
}, 500);
};
StaticSpinner.prototype.stop = function() {
clearInterval(this.interval);
console.log();
};
module.exports = function(text) {
if (process.stdout.isTTY)
return new InteractiveSpinner(text);
else
return new StaticSpinner(text);
};
Zerion Mini Shell 1.0