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import AutosuggestAccountContainer from '../features/compose/containers/autosuggest_account_container';
import ImmutablePropTypes from 'react-immutable-proptypes';
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 < 2 || word[0] !== '@') {
return [null, null];
}
word = word.trim().toLowerCase().slice(1);
if (word.length > 0) {
return [left + 1, word];
} else {
return [null, null];
}
};
const AutosuggestTextarea = React.createClass({
propTypes: {
value: React.PropTypes.string,
suggestions: ImmutablePropTypes.list,
disabled: React.PropTypes.bool,
fileDropDate: React.PropTypes.instanceOf(Date),
placeholder: React.PropTypes.string,
onSuggestionSelected: React.PropTypes.func.isRequired,
onSuggestionsClearRequested: React.PropTypes.func.isRequired,
onSuggestionsFetchRequested: React.PropTypes.func.isRequired,
onChange: React.PropTypes.func.isRequired,
onKeyUp: React.PropTypes.func,
onKeyDown: React.PropTypes.func
},
getInitialState () {
return {
isFileDragging: false,
fileDraggingDate: undefined,
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;
}
switch(e.key) {
case 'Escape':
if (!suggestionsHidden) {
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 (suggestion, e) {
e.preventDefault();
this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestion);
},
componentWillReceiveProps (nextProps) {
if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden) {
this.setState({ suggestionsHidden: false });
}
const fileDropDate = nextProps.fileDropDate;
const { isFileDragging, fileDraggingDate } = this.state;
/*
* We can't detect drop events, because they might not be on the textarea (the app allows dropping anywhere in the
* window). Instead, on-drop, we notify this textarea to stop its hover effect by passing in a prop with the
* drop-date.
*/
if (isFileDragging && fileDraggingDate && fileDropDate // if dragging when props updated, and dates aren't undefined
&& fileDropDate > fileDraggingDate) { // and if the drop date is now greater than when we started dragging
// then we should stop dragging
this.setState({
isFileDragging: false
});
}
},
setTextarea (c) {
this.textarea = c;
},
onDragEnter () {
this.setState({
isFileDragging: true,
fileDraggingDate: new Date()
})
},
onDragExit () {
this.setState({
isFileDragging: false
})
},
render () {
const { value, suggestions, fileDropDate, disabled, placeholder, onKeyUp } = this.props;
const { isFileDragging, suggestionsHidden, selectedSuggestion } = this.state;
const className = isFileDragging ? 'autosuggest-textarea__textarea file-drop' : 'autosuggest-textarea__textarea';
return (
<div className='autosuggest-textarea'>
<textarea
ref={this.setTextarea}
className={className}
disabled={disabled}
placeholder={placeholder}
value={value}
onChange={this.onChange}
onKeyDown={this.onKeyDown}
onKeyUp={onKeyUp}
onBlur={this.onBlur}
onDragEnter={this.onDragEnter}
onDragExit={this.onDragExit}
/>
<div style={{ display: (suggestions.size > 0 && !suggestionsHidden) ? 'block' : 'none' }} className='autosuggest-textarea__suggestions'>
{suggestions.map((suggestion, i) => (
<div key={suggestion} className={`autosuggest-textarea__suggestions__item ${i === selectedSuggestion ? 'selected' : ''}`} onClick={this.onSuggestionClick.bind(this, suggestion)}>
<AutosuggestAccountContainer id={suggestion} />
</div>
))}
</div>
</div>
);
}
});
export default AutosuggestTextarea;
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