fedibird-fe/app/javascript/mastodon/components/autosuggest_textarea.js
unarist 84214b864c Ignore keyevents during text composition (#7205)
KeyboardEvent.key may be physical key name (Escape, Tab, etc.)
even in text composition and it causes hotkeys or suggestion selection.
So we need to check e.which or e.isComposing.

Checking e.which also allows us to avoid Esc key on compositionend in Safari.
2018-04-20 18:36:52 +02:00

224 lines
6.4 KiB
JavaScript

import React from 'react';
import AutosuggestAccountContainer from '../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 '../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+$/);
let right = str.slice(caretPosition).search(/\s/);
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 + 1, 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: 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 });
}
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.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}
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>
);
}
}