mirror of
https://git.kescher.at/CatCatNya/catstodon.git
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6936e5aa69
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
237 lines
6.9 KiB
JavaScript
237 lines
6.9 KiB
JavaScript
import PropTypes from 'prop-types';
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import { useCallback, useRef, useState, useEffect, forwardRef } from 'react';
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import classNames from 'classnames';
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import ImmutablePropTypes from 'react-immutable-proptypes';
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import Overlay from 'react-overlays/Overlay';
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import Textarea from 'react-textarea-autosize';
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import AutosuggestAccountContainer from '../features/compose/containers/autosuggest_account_container';
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import AutosuggestEmoji from './autosuggest_emoji';
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import { AutosuggestHashtag } from './autosuggest_hashtag';
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const textAtCursorMatchesToken = (str, caretPosition) => {
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let word;
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let left = str.slice(0, caretPosition).search(/\S+$/);
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let right = str.slice(caretPosition).search(/\s/);
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if (right < 0) {
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word = str.slice(left);
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} else {
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word = str.slice(left, right + caretPosition);
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}
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if (!word || word.trim().length < 3 || ['@', ':', '#'].indexOf(word[0]) === -1) {
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return [null, null];
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}
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word = word.trim().toLowerCase();
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if (word.length > 0) {
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return [left + 1, word];
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} else {
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return [null, null];
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}
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};
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const AutosuggestTextarea = forwardRef(({
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value,
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suggestions,
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disabled,
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placeholder,
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onSuggestionSelected,
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onSuggestionsClearRequested,
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onSuggestionsFetchRequested,
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onChange,
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onKeyUp,
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onKeyDown,
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onPaste,
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onFocus,
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autoFocus = true,
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lang,
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}, textareaRef) => {
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const [suggestionsHidden, setSuggestionsHidden] = useState(true);
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const [selectedSuggestion, setSelectedSuggestion] = useState(0);
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const lastTokenRef = useRef(null);
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const tokenStartRef = useRef(0);
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const handleChange = useCallback((e) => {
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const [ tokenStart, token ] = textAtCursorMatchesToken(e.target.value, e.target.selectionStart);
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if (token !== null && lastTokenRef.current !== token) {
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tokenStartRef.current = tokenStart;
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lastTokenRef.current = token;
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setSelectedSuggestion(0);
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onSuggestionsFetchRequested(token);
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} else if (token === null) {
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lastTokenRef.current = null;
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onSuggestionsClearRequested();
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}
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onChange(e);
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}, [onSuggestionsFetchRequested, onSuggestionsClearRequested, onChange, setSelectedSuggestion]);
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const handleKeyDown = useCallback((e) => {
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if (disabled) {
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e.preventDefault();
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return;
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}
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if (e.which === 229 || e.isComposing) {
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// Ignore key events during text composition
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// e.key may be a name of the physical key even in this case (e.x. Safari / Chrome on Mac)
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return;
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}
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switch(e.key) {
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case 'Escape':
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if (suggestions.size === 0 || suggestionsHidden) {
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document.querySelector('.ui').parentElement.focus();
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} else {
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e.preventDefault();
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setSuggestionsHidden(true);
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}
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break;
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case 'ArrowDown':
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if (suggestions.size > 0 && !suggestionsHidden) {
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e.preventDefault();
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setSelectedSuggestion(Math.min(selectedSuggestion + 1, suggestions.size - 1));
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}
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break;
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case 'ArrowUp':
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if (suggestions.size > 0 && !suggestionsHidden) {
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e.preventDefault();
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setSelectedSuggestion(Math.max(selectedSuggestion - 1, 0));
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}
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break;
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case 'Enter':
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case 'Tab':
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// Select suggestion
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if (lastTokenRef.current !== null && suggestions.size > 0 && !suggestionsHidden) {
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e.preventDefault();
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e.stopPropagation();
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onSuggestionSelected(tokenStartRef.current, lastTokenRef.current, suggestions.get(selectedSuggestion));
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}
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break;
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}
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if (e.defaultPrevented || !onKeyDown) {
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return;
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}
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onKeyDown(e);
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}, [disabled, suggestions, suggestionsHidden, selectedSuggestion, setSelectedSuggestion, setSuggestionsHidden, onSuggestionSelected, onKeyDown]);
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const handleBlur = useCallback(() => {
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setSuggestionsHidden(true);
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}, [setSuggestionsHidden]);
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const handleFocus = useCallback((e) => {
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if (onFocus) {
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onFocus(e);
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}
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}, [onFocus]);
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const handleSuggestionClick = useCallback((e) => {
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const suggestion = suggestions.get(e.currentTarget.getAttribute('data-index'));
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e.preventDefault();
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onSuggestionSelected(tokenStartRef.current, lastTokenRef.current, suggestion);
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textareaRef.current?.focus();
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}, [suggestions, onSuggestionSelected, textareaRef]);
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const handlePaste = useCallback((e) => {
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if (e.clipboardData && e.clipboardData.files.length === 1) {
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onPaste(e.clipboardData.files);
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e.preventDefault();
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}
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}, [onPaste]);
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// Show the suggestions again whenever they change and the textarea is focused
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useEffect(() => {
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if (suggestions.size > 0 && textareaRef.current === document.activeElement) {
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setSuggestionsHidden(false);
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}
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}, [suggestions, textareaRef, setSuggestionsHidden]);
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const renderSuggestion = (suggestion, i) => {
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let inner, key;
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if (suggestion.type === 'emoji') {
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inner = <AutosuggestEmoji emoji={suggestion} />;
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key = suggestion.id;
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} else if (suggestion.type === 'hashtag') {
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inner = <AutosuggestHashtag tag={suggestion} />;
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key = suggestion.name;
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} else if (suggestion.type === 'account') {
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inner = <AutosuggestAccountContainer id={suggestion.id} />;
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key = suggestion.id;
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}
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return (
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<div role='button' tabIndex={0} key={key} data-index={i} className={classNames('autosuggest-textarea__suggestions__item', { selected: i === selectedSuggestion })} onMouseDown={handleSuggestionClick}>
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{inner}
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</div>
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);
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};
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return (
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<div className='autosuggest-textarea'>
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<Textarea
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ref={textareaRef}
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className='autosuggest-textarea__textarea'
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disabled={disabled}
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placeholder={placeholder}
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autoFocus={autoFocus}
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value={value}
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onChange={handleChange}
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onKeyDown={handleKeyDown}
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onKeyUp={onKeyUp}
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onFocus={handleFocus}
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onBlur={handleBlur}
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onPaste={handlePaste}
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dir='auto'
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aria-autocomplete='list'
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aria-label={placeholder}
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lang={lang}
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/>
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<Overlay show={!(suggestionsHidden || suggestions.isEmpty())} offset={[0, 0]} placement='bottom' target={textareaRef} popperConfig={{ strategy: 'fixed' }}>
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{({ props }) => (
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<div {...props}>
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<div className='autosuggest-textarea__suggestions' style={{ width: textareaRef.current?.clientWidth }}>
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{suggestions.map(renderSuggestion)}
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</div>
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</div>
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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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AutosuggestTextarea.propTypes = {
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value: PropTypes.string,
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suggestions: ImmutablePropTypes.list,
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disabled: PropTypes.bool,
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placeholder: PropTypes.string,
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onSuggestionSelected: PropTypes.func.isRequired,
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onSuggestionsClearRequested: PropTypes.func.isRequired,
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onSuggestionsFetchRequested: PropTypes.func.isRequired,
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onChange: PropTypes.func.isRequired,
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onKeyUp: PropTypes.func,
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onKeyDown: PropTypes.func,
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onPaste: PropTypes.func.isRequired,
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onFocus:PropTypes.func,
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autoFocus: PropTypes.bool,
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lang: PropTypes.string,
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};
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export default AutosuggestTextarea;
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