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import React from 'react'; |
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import PropTypes from 'prop-types'; |
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import { injectIntl, defineMessages } from 'react-intl'; |
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import TextIconButton from './text_icon_button'; |
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import Overlay from 'react-overlays/lib/Overlay'; |
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import Motion from 'flavours/glitch/util/optional_motion'; |
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import spring from 'react-motion/lib/spring'; |
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import { supportsPassiveEvents } from 'detect-passive-events'; |
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import classNames from 'classnames'; |
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import { languages as preloadedLanguages } from 'flavours/glitch/util/initial_state'; |
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import fuzzysort from 'fuzzysort'; |
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const messages = defineMessages({ |
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changeLanguage: { id: 'compose.language.change', defaultMessage: 'Change language' }, |
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search: { id: 'compose.language.search', defaultMessage: 'Search languages...' }, |
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clear: { id: 'emoji_button.clear', defaultMessage: 'Clear' }, |
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}); |
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// Copied from emoji-mart for consistency with emoji picker and since
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// they don't export the icons in the package
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const icons = { |
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loupe: ( |
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<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' width='13' height='13'> |
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<path d='M12.9 14.32a8 8 0 1 1 1.41-1.41l5.35 5.33-1.42 1.42-5.33-5.34zM8 14A6 6 0 1 0 8 2a6 6 0 0 0 0 12z' /> |
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</svg> |
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), |
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delete: ( |
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<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' width='13' height='13'> |
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<path d='M10 8.586L2.929 1.515 1.515 2.929 8.586 10l-7.071 7.071 1.414 1.414L10 11.414l7.071 7.071 1.414-1.414L11.414 10l7.071-7.071-1.414-1.414L10 8.586z' /> |
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</svg> |
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), |
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}; |
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const listenerOptions = supportsPassiveEvents ? { passive: true } : false; |
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class LanguageDropdownMenu extends React.PureComponent { |
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static propTypes = { |
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style: PropTypes.object, |
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value: PropTypes.string.isRequired, |
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frequentlyUsedLanguages: PropTypes.arrayOf(PropTypes.string).isRequired, |
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placement: PropTypes.string.isRequired, |
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onClose: PropTypes.func.isRequired, |
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onChange: PropTypes.func.isRequired, |
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languages: PropTypes.arrayOf(PropTypes.arrayOf(PropTypes.string)), |
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intl: PropTypes.object, |
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}; |
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static defaultProps = { |
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languages: preloadedLanguages, |
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}; |
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state = { |
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mounted: false, |
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searchValue: '', |
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}; |
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handleDocumentClick = e => { |
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if (this.node && !this.node.contains(e.target)) { |
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this.props.onClose(); |
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} |
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} |
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componentDidMount () { |
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document.addEventListener('click', this.handleDocumentClick, false); |
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document.addEventListener('touchend', this.handleDocumentClick, listenerOptions); |
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this.setState({ mounted: true }); |
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} |
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componentWillUnmount () { |
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document.removeEventListener('click', this.handleDocumentClick, false); |
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document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions); |
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} |
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setRef = c => { |
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this.node = c; |
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} |
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setListRef = c => { |
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this.listNode = c; |
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} |
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handleSearchChange = ({ target }) => { |
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this.setState({ searchValue: target.value }); |
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} |
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search () { |
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const { languages, value, frequentlyUsedLanguages } = this.props; |
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const { searchValue } = this.state; |
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if (searchValue === '') { |
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return [...languages].sort((a, b) => { |
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// Push current selection to the top of the list
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if (a[0] === value) { |
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return -1; |
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} else if (b[0] === value) { |
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return 1; |
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} else { |
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// Sort according to frequently used languages
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const indexOfA = frequentlyUsedLanguages.indexOf(a[0]); |
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const indexOfB = frequentlyUsedLanguages.indexOf(b[0]); |
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return ((indexOfA > -1 ? indexOfA : Infinity) - (indexOfB > -1 ? indexOfB : Infinity)); |
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} |
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}); |
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} |
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return fuzzysort.go(searchValue, languages, { |
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keys: ['0', '1', '2'], |
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limit: 5, |
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threshold: -10000, |
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}).map(result => result.obj); |
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} |
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frequentlyUsed () { |
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const { languages, value } = this.props; |
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const current = languages.find(lang => lang[0] === value); |
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const results = []; |
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if (current) { |
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results.push(current); |
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} |
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return results; |
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} |
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handleClick = e => { |
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const value = e.currentTarget.getAttribute('data-index'); |
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e.preventDefault(); |
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this.props.onClose(); |
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this.props.onChange(value); |
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} |
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handleKeyDown = e => { |
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const { onClose } = this.props; |
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const index = Array.from(this.listNode.childNodes).findIndex(node => node === e.currentTarget); |
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let element = null; |
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switch(e.key) { |
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case 'Escape': |
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onClose(); |
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break; |
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case 'Enter': |
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this.handleClick(e); |
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break; |
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case 'ArrowDown': |
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element = this.listNode.childNodes[index + 1] || this.listNode.firstChild; |
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break; |
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case 'ArrowUp': |
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element = this.listNode.childNodes[index - 1] || this.listNode.lastChild; |
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break; |
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case 'Tab': |
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if (e.shiftKey) { |
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element = this.listNode.childNodes[index - 1] || this.listNode.lastChild; |
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} else { |
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element = this.listNode.childNodes[index + 1] || this.listNode.firstChild; |
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} |
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break; |
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case 'Home': |
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element = this.listNode.firstChild; |
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break; |
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case 'End': |
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element = this.listNode.lastChild; |
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break; |
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} |
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if (element) { |
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element.focus(); |
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e.preventDefault(); |
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e.stopPropagation(); |
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} |
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} |
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handleSearchKeyDown = e => { |
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const { onChange, onClose } = this.props; |
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const { searchValue } = this.state; |
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let element = null; |
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switch(e.key) { |
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case 'Tab': |
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case 'ArrowDown': |
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element = this.listNode.firstChild; |
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if (element) { |
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element.focus(); |
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e.preventDefault(); |
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e.stopPropagation(); |
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} |
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break; |
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case 'Enter': |
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element = this.listNode.firstChild; |
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if (element) { |
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onChange(element.getAttribute('data-index')); |
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onClose(); |
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} |
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break; |
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case 'Escape': |
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if (searchValue !== '') { |
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e.preventDefault(); |
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this.handleClear(); |
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} |
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break; |
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} |
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} |
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handleClear = () => { |
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this.setState({ searchValue: '' }); |
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} |
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renderItem = lang => { |
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const { value } = this.props; |
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return ( |
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<div key={lang[0]} role='option' tabIndex='0' data-index={lang[0]} className={classNames('language-dropdown__dropdown__results__item', { active: lang[0] === value })} aria-selected={lang[0] === value} onClick={this.handleClick} onKeyDown={this.handleKeyDown}> |
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<span className='language-dropdown__dropdown__results__item__native-name'>{lang[2]}</span> <span className='language-dropdown__dropdown__results__item__common-name'>({lang[1]})</span> |
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</div> |
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); |
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} |
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render () { |
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const { style, placement, intl } = this.props; |
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const { mounted, searchValue } = this.state; |
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const isSearching = searchValue !== ''; |
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const results = this.search(); |
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return ( |
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<Motion defaultStyle={{ opacity: 0, scaleX: 0.85, scaleY: 0.75 }} style={{ opacity: spring(1, { damping: 35, stiffness: 400 }), scaleX: spring(1, { damping: 35, stiffness: 400 }), scaleY: spring(1, { damping: 35, stiffness: 400 }) }}> |
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{({ opacity, scaleX, scaleY }) => ( |
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// It should not be transformed when mounting because the resulting
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// size will be used to determine the coordinate of the menu by
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// react-overlays
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<div className={`language-dropdown__dropdown ${placement}`} style={{ ...style, opacity: opacity, transform: mounted ? `scale(${scaleX}, ${scaleY})` : null }} ref={this.setRef}> |
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<div className='emoji-mart-search'> |
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<input type='search' value={searchValue} onChange={this.handleSearchChange} onKeyDown={this.handleSearchKeyDown} placeholder={intl.formatMessage(messages.search)} autoFocus /> |
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<button className='emoji-mart-search-icon' disabled={!isSearching} aria-label={intl.formatMessage(messages.clear)} onClick={this.handleClear}>{!isSearching ? icons.loupe : icons.delete}</button> |
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</div> |
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<div className='language-dropdown__dropdown__results emoji-mart-scroll' role='listbox' ref={this.setListRef}> |
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{results.map(this.renderItem)} |
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</div> |
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</div> |
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)} |
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</Motion> |
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); |
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} |
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} |
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export default @injectIntl |
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class LanguageDropdown extends React.PureComponent { |
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static propTypes = { |
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value: PropTypes.string, |
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frequentlyUsedLanguages: PropTypes.arrayOf(PropTypes.string), |
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intl: PropTypes.object.isRequired, |
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onChange: PropTypes.func, |
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onClose: PropTypes.func, |
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}; |
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state = { |
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open: false, |
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placement: 'bottom', |
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}; |
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handleToggle = ({ target }) => { |
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const { top } = target.getBoundingClientRect(); |
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if (this.state.open && this.activeElement) { |
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this.activeElement.focus({ preventScroll: true }); |
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} |
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this.setState({ placement: top * 2 < innerHeight ? 'bottom' : 'top' }); |
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this.setState({ open: !this.state.open }); |
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} |
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handleClose = () => { |
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const { value, onClose } = this.props; |
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if (this.state.open && this.activeElement) { |
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this.activeElement.focus({ preventScroll: true }); |
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} |
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this.setState({ open: false }); |
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onClose(value); |
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} |
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handleChange = value => { |
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const { onChange } = this.props; |
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onChange(value); |
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} |
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render () { |
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const { value, intl, frequentlyUsedLanguages } = this.props; |
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const { open, placement } = this.state; |
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return ( |
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<div className={classNames('privacy-dropdown', { active: open })}> |
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<div className='privacy-dropdown__value'> |
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<TextIconButton |
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className='privacy-dropdown__value-icon' |
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label={value && value.toUpperCase()} |
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title={intl.formatMessage(messages.changeLanguage)} |
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active={open} |
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onClick={this.handleToggle} |
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/> |
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</div> |
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<Overlay show={open} placement={placement} target={this}> |
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<LanguageDropdownMenu |
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value={value} |
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frequentlyUsedLanguages={frequentlyUsedLanguages} |
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onClose={this.handleClose} |
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onChange={this.handleChange} |
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placement={placement} |
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intl={intl} |
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/> |
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</Overlay> |
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</div> |
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); |
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} |
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} |