cafe-grader-web

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announcement on top menu bar
Commit Description:
announcement on top menu bar
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r804:b80b4e632bb0 default
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node_modules/jszip/lib/nodejs/NodejsStreamInputAdapter.js | 74 lines | 1.8 KiB | application/javascript | JavascriptLexer |
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"use strict";
var utils = require('../utils');
var GenericWorker = require('../stream/GenericWorker');
/**
* A worker that use a nodejs stream as source.
* @constructor
* @param {String} filename the name of the file entry for this stream.
* @param {Readable} stream the nodejs stream.
*/
function NodejsStreamInputAdapter(filename, stream) {
GenericWorker.call(this, "Nodejs stream input adapter for " + filename);
this._upstreamEnded = false;
this._bindStream(stream);
}
utils.inherits(NodejsStreamInputAdapter, GenericWorker);
/**
* Prepare the stream and bind the callbacks on it.
* Do this ASAP on node 0.10 ! A lazy binding doesn't always work.
* @param {Stream} stream the nodejs stream to use.
*/
NodejsStreamInputAdapter.prototype._bindStream = function (stream) {
var self = this;
this._stream = stream;
stream.pause();
stream
.on("data", function (chunk) {
self.push({
data: chunk,
meta : {
percent : 0
}
});
})
.on("error", function (e) {
if(self.isPaused) {
this.generatedError = e;
} else {
self.error(e);
}
})
.on("end", function () {
if(self.isPaused) {
self._upstreamEnded = true;
} else {
self.end();
}
});
};
NodejsStreamInputAdapter.prototype.pause = function () {
if(!GenericWorker.prototype.pause.call(this)) {
return false;
}
this._stream.pause();
return true;
};
NodejsStreamInputAdapter.prototype.resume = function () {
if(!GenericWorker.prototype.resume.call(this)) {
return false;
}
if(this._upstreamEnded) {
this.end();
} else {
this._stream.resume();
}
return true;
};
module.exports = NodejsStreamInputAdapter;