36 lines
679 B
JavaScript
36 lines
679 B
JavaScript
'use strict'
|
|
|
|
/*!
|
|
* Canvas - PDFStream
|
|
*/
|
|
|
|
const { Readable } = require('stream')
|
|
function noop () {}
|
|
|
|
class PDFStream extends Readable {
|
|
constructor (canvas, options) {
|
|
super()
|
|
|
|
this.canvas = canvas
|
|
this.options = options
|
|
}
|
|
|
|
_read () {
|
|
// For now we're not controlling the c++ code's data emission, so we only
|
|
// call canvas.streamPDFSync once and let it emit data at will.
|
|
this._read = noop
|
|
|
|
this.canvas.streamPDFSync((err, chunk, len) => {
|
|
if (err) {
|
|
this.emit('error', err)
|
|
} else if (len) {
|
|
this.push(chunk)
|
|
} else {
|
|
this.push(null)
|
|
}
|
|
}, this.options)
|
|
}
|
|
}
|
|
|
|
module.exports = PDFStream
|