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Text truncating label
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| import React from 'react'; | |
| const STYLE = { | |
| display: 'inline-block', | |
| overflow: 'hidden', | |
| whiteSpace: 'nowrap', | |
| }; | |
| const MIN_TEXT_LENGHT = 6; | |
| const MIN_LABEL_WIDTH = 40; | |
| /** | |
| * A text label that adapts to `width` by truncating | |
| * the text from the middle. | |
| * @class Label | |
| * @extends React.Component | |
| */ | |
| export default class Label extends React.Component { | |
| static propTypes = { | |
| /** the text to display */ | |
| text: React.PropTypes.string.isRequired, | |
| /** (optional) width of the label in pixels */ | |
| width: React.PropTypes.number, | |
| /** (optional) extra styles */ | |
| style: React.PropTypes.object, | |
| }; | |
| constructor(props) { | |
| super(props); | |
| this.state = {text: props.text}; | |
| } | |
| componentDidMount() { | |
| this.updateTextSize(); | |
| } | |
| componentWillReceiveProps(nextProps) { | |
| const text = nextProps.text || this.props.text; | |
| this.setState({text}); | |
| } | |
| componentDidUpdate() { this.updateTextSize(); } | |
| updateTextSize() { | |
| const props = this.props; | |
| const node = React.findDOMNode(this); | |
| const width = props.width && props.width || node.offsetWidth; | |
| if (props.text.length > MIN_TEXT_LENGHT && width > MIN_LABEL_WIDTH) { | |
| if (width < node.scrollWidth) { | |
| const {text} = this.state; | |
| const chunk = text.length / 2; | |
| this.setState({ | |
| text: text.substring(0, chunk - 1) + '…' + text.substring(chunk + 1) | |
| }); | |
| } | |
| } | |
| } | |
| render() { | |
| const {width, style, text: title, ...props} = this.props; | |
| return ( | |
| <span {...props} | |
| style={{...STYLE, width, ...style}} | |
| title={title}> | |
| {this.state.text} | |
| </span> | |
| ); | |
| } | |
| } |
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