| System: Linux srv913213 5.15.0-190-generic #200-Ubuntu SMP Fri Aug 7 15:06:04 UTC 2026 x86_64 Current Path : /var/www/talentgenesis_admin_backend/node_modules/exceljs/dist/es5/utils/ |
| Current File : /var/www/talentgenesis_admin_backend/node_modules/exceljs/dist/es5/utils/stuttered-pipe.js |
"use strict";
const events = require('events');
// =============================================================================
// StutteredPipe - Used to slow down streaming so GC can get a look in
class StutteredPipe extends events.EventEmitter {
constructor(readable, writable, options) {
super();
options = options || {};
this.readable = readable;
this.writable = writable;
this.bufSize = options.bufSize || 16384;
this.autoPause = options.autoPause || false;
this.paused = false;
this.eod = false;
this.scheduled = null;
readable.on('end', () => {
this.eod = true;
writable.end();
});
// need to have some way to communicate speed of stream
// back from the consumer
readable.on('readable', () => {
if (!this.paused) {
this.resume();
}
});
this._schedule();
}
pause() {
this.paused = true;
}
resume() {
if (!this.eod) {
if (this.scheduled !== null) {
clearImmediate(this.scheduled);
}
this._schedule();
}
}
_schedule() {
this.scheduled = setImmediate(() => {
this.scheduled = null;
if (!this.eod && !this.paused) {
const data = this.readable.read(this.bufSize);
if (data && data.length) {
this.writable.write(data);
if (!this.paused && !this.autoPause) {
this._schedule();
}
} else if (!this.paused) {
this._schedule();
}
}
});
}
}
module.exports = StutteredPipe;
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