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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: 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>
);
}
}
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