import React from 'react'; import AutosuggestAccountContainer from 'flavours/glitch/features/compose/containers/autosuggest_account_container'; import AutosuggestEmoji from './autosuggest_emoji'; import ImmutablePropTypes from 'react-immutable-proptypes'; import PropTypes from 'prop-types'; import { isRtl } from 'flavours/glitch/util/rtl'; import ImmutablePureComponent from 'react-immutable-pure-component'; import Textarea from 'react-textarea-autosize'; import classNames from 'classnames'; const textAtCursorMatchesToken = (str, caretPosition) => { let word; let left = str.slice(0, caretPosition).search(/[^\s\u200B]+$/); let right = str.slice(caretPosition).search(/[\s\u200B]/); if (right < 0) { word = str.slice(left); } else { word = str.slice(left, right + caretPosition); } if (!word || word.trim().length < 3 || ['@', ':', '#'].indexOf(word[0]) === -1) { return [null, null]; } word = word.trim().toLowerCase(); if (word.length > 0) { return [left, word]; } else { return [null, null]; } }; export default class AutosuggestTextarea extends ImmutablePureComponent { static propTypes = { value: PropTypes.string, suggestions: ImmutablePropTypes.list, disabled: PropTypes.bool, placeholder: PropTypes.string, onSuggestionSelected: PropTypes.func.isRequired, onSuggestionsClearRequested: PropTypes.func.isRequired, onSuggestionsFetchRequested: PropTypes.func.isRequired, onChange: PropTypes.func.isRequired, onKeyUp: PropTypes.func, onKeyDown: PropTypes.func, onPaste: PropTypes.func.isRequired, autoFocus: PropTypes.bool, }; static defaultProps = { autoFocus: true, }; state = { suggestionsHidden: true, focused: false, selectedSuggestion: 0, lastToken: null, tokenStart: 0, }; onChange = (e) => { const [ tokenStart, token ] = textAtCursorMatchesToken(e.target.value, e.target.selectionStart); if (token !== null && this.state.lastToken !== token) { this.setState({ lastToken: token, selectedSuggestion: 0, tokenStart }); this.props.onSuggestionsFetchRequested(token); } else if (token === null) { this.setState({ lastToken: null }); this.props.onSuggestionsClearRequested(); } this.props.onChange(e); } onKeyDown = (e) => { const { suggestions, disabled } = this.props; const { selectedSuggestion, suggestionsHidden } = this.state; if (disabled) { e.preventDefault(); return; } if (e.which === 229 || e.isComposing) { // Ignore key events during text composition // e.key may be a name of the physical key even in this case (e.x. Safari / Chrome on Mac) return; } switch(e.key) { case 'Escape': if (suggestions.size === 0 || suggestionsHidden) { document.querySelector('.ui').parentElement.focus(); } else { e.preventDefault(); this.setState({ suggestionsHidden: true }); } break; case 'ArrowDown': if (suggestions.size > 0 && !suggestionsHidden) { e.preventDefault(); this.setState({ selectedSuggestion: Math.min(selectedSuggestion + 1, suggestions.size - 1) }); } break; case 'ArrowUp': if (suggestions.size > 0 && !suggestionsHidden) { e.preventDefault(); this.setState({ selectedSuggestion: Math.max(selectedSuggestion - 1, 0) }); } break; case 'Enter': case 'Tab': // Select suggestion if (this.state.lastToken !== null && suggestions.size > 0 && !suggestionsHidden) { e.preventDefault(); e.stopPropagation(); this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestions.get(selectedSuggestion)); } break; } if (e.defaultPrevented || !this.props.onKeyDown) { return; } this.props.onKeyDown(e); } onBlur = () => { this.setState({ suggestionsHidden: true, focused: false }); } onFocus = () => { this.setState({ focused: true }); } onSuggestionClick = (e) => { const suggestion = this.props.suggestions.get(e.currentTarget.getAttribute('data-index')); e.preventDefault(); this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestion); this.textarea.focus(); } componentWillReceiveProps (nextProps) { if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden && this.state.focused) { this.setState({ suggestionsHidden: false }); } } setTextarea = (c) => { this.textarea = c; } onPaste = (e) => { if (e.clipboardData && e.clipboardData.files.length === 1) { this.props.onPaste(e.clipboardData.files); e.preventDefault(); } } renderSuggestion = (suggestion, i) => { const { selectedSuggestion } = this.state; let inner, key; if (typeof suggestion === 'object') { inner = <AutosuggestEmoji emoji={suggestion} />; key = suggestion.id; } else if (suggestion[0] === '#') { inner = suggestion; key = suggestion; } else { inner = <AutosuggestAccountContainer id={suggestion} />; key = suggestion; } return ( <div role='button' tabIndex='0' key={key} data-index={i} className={classNames('autosuggest-textarea__suggestions__item', { selected: i === selectedSuggestion })} onMouseDown={this.onSuggestionClick}> {inner} </div> ); } render () { const { value, suggestions, disabled, placeholder, onKeyUp, autoFocus } = this.props; const { suggestionsHidden } = this.state; const style = { direction: 'ltr' }; if (isRtl(value)) { style.direction = 'rtl'; } return ( <div className='autosuggest-textarea'> <label> <span style={{ display: 'none' }}>{placeholder}</span> <Textarea inputRef={this.setTextarea} className='autosuggest-textarea__textarea' disabled={disabled} placeholder={placeholder} autoFocus={autoFocus} value={value} onChange={this.onChange} onKeyDown={this.onKeyDown} onKeyUp={onKeyUp} onFocus={this.onFocus} onBlur={this.onBlur} onPaste={this.onPaste} style={style} aria-autocomplete='list' /> </label> <div className={`autosuggest-textarea__suggestions ${suggestionsHidden || suggestions.isEmpty() ? '' : 'autosuggest-textarea__suggestions--visible'}`}> {suggestions.map(this.renderSuggestion)} </div> </div> ); } }