84 lines
2.0 KiB
JavaScript
84 lines
2.0 KiB
JavaScript
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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// https://github.com/cmanzana/qrcode-npm packaging the standard
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// https://github.com/kazuhikoarase/qrcode-generator
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import { qrcode } from 'qrcode-npm';
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import React, { Component, PropTypes } from 'react';
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const QROPTS = {
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CODE_TYPE: 4,
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ERROR_LEVEL: 'M'
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};
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export default class QrCode extends Component {
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static propTypes = {
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className: PropTypes.string,
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margin: PropTypes.number,
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size: PropTypes.number,
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value: PropTypes.string.isRequired
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};
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static defaultProps = {
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margin: 2,
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size: 5
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};
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state = {
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image: null
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};
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componentWillMount () {
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this.generateCode(this.props);
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}
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componentWillReceiveProps (nextProps) {
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const hasChanged = nextProps.value !== this.props.value ||
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nextProps.size !== this.props.size ||
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nextProps.margin !== this.props.margin;
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if (hasChanged) {
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this.generateCode(nextProps);
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}
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}
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render () {
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const { className } = this.props;
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const { image } = this.state;
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return (
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<div
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className={ className }
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dangerouslySetInnerHTML={ {
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__html: image
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} }
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/>
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);
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}
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generateCode (props) {
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const { margin, size, value } = props;
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const qr = qrcode(QROPTS.CODE_TYPE, QROPTS.ERROR_LEVEL);
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qr.addData(value);
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qr.make();
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this.setState({
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image: qr.createImgTag(size, margin)
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});
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}
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}
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