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Re-implemented autosuggestions component for the compose form
Fix mastodon#205, fix mastodon#156, fix mastodon#124
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153 changes: 153 additions & 0 deletions
153
app/assets/javascripts/components/components/autosuggest_textarea.jsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| import AutosuggestAccountContainer from '../features/compose/containers/autosuggest_account_container'; | ||
| import ImmutablePropTypes from 'react-immutable-proptypes'; | ||
|
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| const textAtCursorMatchesToken = (str, caretPosition) => { | ||
| let word; | ||
|
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| let left = str.slice(0, caretPosition).search(/\S+$/); | ||
| let right = str.slice(caretPosition).search(/\s/); | ||
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| if (right < 0) { | ||
| word = str.slice(left); | ||
| } else { | ||
| word = str.slice(left, right + caretPosition); | ||
| } | ||
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| if (!word || word.trim().length < 2 || word[0] !== '@') { | ||
| return [null, null]; | ||
| } | ||
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| word = word.trim().toLowerCase().slice(1); | ||
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| if (word.length > 0) { | ||
| return [left + 1, word]; | ||
| } else { | ||
| return [null, null]; | ||
| } | ||
| }; | ||
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| const AutosuggestTextarea = React.createClass({ | ||
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| propTypes: { | ||
| value: React.PropTypes.string, | ||
| suggestions: ImmutablePropTypes.list, | ||
| disabled: React.PropTypes.bool, | ||
| placeholder: React.PropTypes.string, | ||
| onSuggestionSelected: React.PropTypes.func.isRequired, | ||
| onSuggestionsClearRequested: React.PropTypes.func.isRequired, | ||
| onSuggestionsFetchRequested: React.PropTypes.func.isRequired, | ||
| onChange: React.PropTypes.func.isRequired | ||
| }, | ||
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| getInitialState () { | ||
| return { | ||
| suggestionsHidden: false, | ||
| selectedSuggestion: 0, | ||
| lastToken: null, | ||
| tokenStart: 0 | ||
| }; | ||
| }, | ||
|
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| onChange (e) { | ||
| const [ tokenStart, token ] = textAtCursorMatchesToken(e.target.value, e.target.selectionStart); | ||
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| if (token != null && this.state.lastToken !== token) { | ||
| this.setState({ lastToken: token, selectedSuggestion: 0, tokenStart }); | ||
| this.props.onSuggestionsFetchRequested(token); | ||
| } else if (token === null && this.state.lastToken != null) { | ||
| this.setState({ lastToken: null }); | ||
| this.props.onSuggestionsClearRequested(); | ||
| } | ||
|
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| this.props.onChange(e); | ||
| }, | ||
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| onKeyDown (e) { | ||
| const { suggestions, disabled } = this.props; | ||
| const { selectedSuggestion, suggestionsHidden } = this.state; | ||
|
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| if (disabled) { | ||
| e.preventDefault(); | ||
| return; | ||
| } | ||
|
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| switch(e.key) { | ||
| case 'Escape': | ||
| if (!suggestionsHidden) { | ||
| e.preventDefault(); | ||
| this.setState({ suggestionsHidden: true }); | ||
| } | ||
|
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| break; | ||
| case 'ArrowDown': | ||
| if (suggestions.size > 0 && !suggestionsHidden) { | ||
| e.preventDefault(); | ||
| this.setState({ selectedSuggestion: Math.min(selectedSuggestion + 1, suggestions.size - 1) }); | ||
| } | ||
|
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| break; | ||
| case 'ArrowUp': | ||
| if (suggestions.size > 0 && !suggestionsHidden) { | ||
| e.preventDefault(); | ||
| this.setState({ selectedSuggestion: Math.max(selectedSuggestion - 1, 0) }); | ||
| } | ||
|
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| 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)); | ||
| } | ||
|
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| break; | ||
| } | ||
| }, | ||
|
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| onSuggestionClick (suggestion, e) { | ||
| e.preventDefault(); | ||
| this.props.onSuggestionSelected(this.state.tokenStart, this.state.lastToken, suggestion); | ||
| }, | ||
|
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| componentWillReceiveProps (nextProps) { | ||
| if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden) { | ||
| this.setState({ suggestionsHidden: false }); | ||
| } | ||
| }, | ||
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| setTextarea (c) { | ||
| this.textarea = c; | ||
| }, | ||
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| render () { | ||
| const { value, suggestions, disabled, placeholder } = this.props; | ||
| const { suggestionsHidden, selectedSuggestion } = this.state; | ||
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| return ( | ||
| <div className='autosuggest-textarea'> | ||
| <textarea | ||
| ref={this.setTextarea} | ||
| className='autosuggest-textarea__textarea' | ||
| disabled={disabled} | ||
| placeholder={placeholder} | ||
| value={value} | ||
| onChange={this.onChange} | ||
| onKeyDown={this.onKeyDown} | ||
| /> | ||
|
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| <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> | ||
| ); | ||
| } | ||
|
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| }); | ||
|
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| export default AutosuggestTextarea; |
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