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[FEAT] Optional maxWidth prop for barcode maximum width #58

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[FEAT] Optional maxWidth prop for barcode maximum width #58

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22 changes: 17 additions & 5 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,9 @@ export default class Barcode extends PureComponent {
/* Set the background of the barcode. */
background: PropTypes.string,
/* Handle error for invalid barcode of selected format */
onError: PropTypes.func
onError: PropTypes.func,
/* Maximum width of the barcode */
maxWidth: PropTypes.number
};

static defaultProps = {
Expand All @@ -37,7 +39,8 @@ export default class Barcode extends PureComponent {
lineColor: '#000000',
textColor: '#000000',
background: '#ffffff',
onError: undefined
onError: undefined,
maxWidth: undefined
};

constructor(props) {
Expand All @@ -64,11 +67,20 @@ export default class Barcode extends PureComponent {

update() {
const encoder = barcodes[this.props.format];
const encoded = this.encode(this.props.value, encoder, this.props);
let encoded = this.encode(this.props.value, encoder, this.props);
let { width, maxWidth } = this.props;

if (maxWidth && encoded) {
const length = encoded.data.length * width;
if (length > maxWidth) {
width = maxWidth / encoded.data.length;
encoded = this.encode(this.props.value, encoder, {...this.props, width})
}
}

if (encoded) {
this.state.bars = this.drawSvgBarCode(encoded, this.props);
this.state.barCodeWidth = encoded.data.length * this.props.width;
this.state.bars = this.drawSvgBarCode(encoded, {...this.props, width});
this.state.barCodeWidth = encoded.data.length * width;
}
}

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