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https://gitee.com/onvia/ccc-tnt-psd2ui
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36 lines
679 B
JavaScript
36 lines
679 B
JavaScript
'use strict'
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/*!
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* Canvas - PDFStream
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*/
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const { Readable } = require('stream')
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function noop () {}
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class PDFStream extends Readable {
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constructor (canvas, options) {
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super()
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this.canvas = canvas
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this.options = options
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}
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_read () {
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// For now we're not controlling the c++ code's data emission, so we only
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// call canvas.streamPDFSync once and let it emit data at will.
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this._read = noop
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this.canvas.streamPDFSync((err, chunk, len) => {
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if (err) {
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this.emit('error', err)
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} else if (len) {
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this.push(chunk)
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} else {
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this.push(null)
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}
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}, this.options)
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}
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}
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module.exports = PDFStream
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