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import { SIDE_BIN, MIDDLE_BIN } from './constants'; |
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import encode from './encoder'; |
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import Barcode from '../Barcode'; |
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// Base class for EAN8 & EAN13 |
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class EAN extends Barcode { |
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constructor(data, options) { |
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super(data, options); |
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// Make sure the font is not bigger than the space between the guard bars |
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this.fontSize = !options.flat && options.fontSize > options.width * 10 |
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? options.width * 10 |
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: options.fontSize; |
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// Make the guard bars go down half the way of the text |
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this.guardHeight = options.height + this.fontSize / 2 + options.textMargin; |
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} |
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encode() { |
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return this.options.flat |
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? this.encodeFlat() |
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: this.encodeGuarded(); |
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} |
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leftText(from, to) { |
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return this.text.substr(from, to); |
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} |
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leftEncode(data, structure) { |
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return encode(data, structure); |
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} |
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rightText(from, to) { |
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return this.text.substr(from, to); |
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} |
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rightEncode(data, structure) { |
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return encode(data, structure); |
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} |
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encodeGuarded() { |
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const textOptions = { fontSize: this.fontSize }; |
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const guardOptions = { height: this.guardHeight }; |
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return [ |
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{ data: SIDE_BIN, options: guardOptions }, |
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{ data: this.leftEncode(), text: this.leftText(), options: textOptions }, |
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{ data: MIDDLE_BIN, options: guardOptions }, |
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{ data: this.rightEncode(), text: this.rightText(), options: textOptions }, |
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{ data: SIDE_BIN, options: guardOptions }, |
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]; |
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} |
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encodeFlat() { |
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const data = [ |
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SIDE_BIN, |
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this.leftEncode(), |
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MIDDLE_BIN, |
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this.rightEncode(), |
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SIDE_BIN |
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]; |
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return { |
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data: data.join(''), |
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text: this.text |
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}; |
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} |
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} |
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export default EAN; |
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lindell /
JsBarcode
