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index.js
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index.js
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var Readable = require('stream').Readable;
var inherits = require('util').inherits;
var walkitout = require('walkitout');
inherits(WioStream, Readable);
WioStream.prototype = Object.create(
WioStream.prototype, {
_read: {
value: function () {
if (!this._walkInitiated) this._walk();
}
},
_walk: {
value: function () {
this._walkInitiated = true;
this._cancelWalk = walkitout(this._walkStartPath,
function (err, filename, done) {
if (err) this.emit('error', err);
else this.push(filename);
done();
}.bind(this),
function (cancelled) {
if (cancelled) this.emit('cancel');
setImmediate(this.push.bind(this, null));
}.bind(this),
null,
this._descentController
);
}
},
_cancelWalkUnbound: {
value: function () {
if (this._cancelWalkRequested)
return;
this._cancelWalkRequested = true;
this._cancelWalkWhenAble();
}
},
_cancelWalkWhenAbleUnbound: {
value: function () {
if (this._cancelWalk) {
this._cancelWalk();
} else {
this._cancelWalkTimer = setTimeout(
this._cancelWalkWhenAble, 70);
}
}
},
_walkStartPath: { value: '', writable: true },
_walkInitiated: { value: false, writable: true },
_descentController: { value: null, writable: true },
_cancelWalkRequested: { value: false, writable: true },
_cancelWalkTimer: { value: null, writable: true },
_cancelWalk: { value: null, writable: true },
_cancelWalkWhenAble: { value: null, writable: true },
cancelWalk: { value: null, writable: true }
});
module.exports = wiostream;
function wiostream(path, encoding, controller) {
return new WioStream(path, encoding || 'utf8', controller);
}
function WioStream(startPath, encoding, controller) {
this._walkStartPath = startPath;
this._descentController = controller;
this._cancelWalkWhenAble = this
._cancelWalkWhenAbleUnbound.bind(this);
this.cancelWalk = this._cancelWalkUnbound.bind(this);
Readable.call(this, {
'encoding': encoding
});
}