cafe-grader-web

Location: cafe-grader-web/node_modules/jszip/lib/stream/DataWorker.js - annotation

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Commit Description:
fix wrong merge
Commit Description:
fix wrong merge
References:
r846:4279bf26f98b algo
File last commit:
r789:8cd7e8db7e38 default
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node_modules/jszip/lib/stream/DataWorker.js | 116 lines | 2.7 KiB | application/javascript | JavascriptLexer |
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admin
move datatable to yarn
 r789 'use strict';
var utils = require('../utils');
var GenericWorker = require('./GenericWorker');
// the size of the generated chunks
// TODO expose this as a public variable
var DEFAULT_BLOCK_SIZE = 16 * 1024;
/**
* A worker that reads a content and emits chunks.
* @constructor
* @param {Promise} dataP the promise of the data to split
*/
function DataWorker(dataP) {
GenericWorker.call(this, "DataWorker");
var self = this;
this.dataIsReady = false;
this.index = 0;
this.max = 0;
this.data = null;
this.type = "";
this._tickScheduled = false;
dataP.then(function (data) {
self.dataIsReady = true;
self.data = data;
self.max = data && data.length || 0;
self.type = utils.getTypeOf(data);
if(!self.isPaused) {
self._tickAndRepeat();
}
}, function (e) {
self.error(e);
});
}
utils.inherits(DataWorker, GenericWorker);
/**
* @see GenericWorker.cleanUp
*/
DataWorker.prototype.cleanUp = function () {
GenericWorker.prototype.cleanUp.call(this);
this.data = null;
};
/**
* @see GenericWorker.resume
*/
DataWorker.prototype.resume = function () {
if(!GenericWorker.prototype.resume.call(this)) {
return false;
}
if (!this._tickScheduled && this.dataIsReady) {
this._tickScheduled = true;
utils.delay(this._tickAndRepeat, [], this);
}
return true;
};
/**
* Trigger a tick a schedule an other call to this function.
*/
DataWorker.prototype._tickAndRepeat = function() {
this._tickScheduled = false;
if(this.isPaused || this.isFinished) {
return;
}
this._tick();
if(!this.isFinished) {
utils.delay(this._tickAndRepeat, [], this);
this._tickScheduled = true;
}
};
/**
* Read and push a chunk.
*/
DataWorker.prototype._tick = function() {
if(this.isPaused || this.isFinished) {
return false;
}
var size = DEFAULT_BLOCK_SIZE;
var data = null, nextIndex = Math.min(this.max, this.index + size);
if (this.index >= this.max) {
// EOF
return this.end();
} else {
switch(this.type) {
case "string":
data = this.data.substring(this.index, nextIndex);
break;
case "uint8array":
data = this.data.subarray(this.index, nextIndex);
break;
case "array":
case "nodebuffer":
data = this.data.slice(this.index, nextIndex);
break;
}
this.index = nextIndex;
return this.push({
data : data,
meta : {
percent : this.max ? this.index / this.max * 100 : 0
}
});
}
};
module.exports = DataWorker;