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author | kibigo! <marrus-sh@users.noreply.github.com> | 2017-11-17 19:11:18 -0800 |
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committer | kibigo! <marrus-sh@users.noreply.github.com> | 2017-11-17 19:29:16 -0800 |
commit | 45c44989c8fb6e24badd18bb83ac5f68de0aceaf (patch) | |
tree | 794d088986d8518506e3e1eec0c8ffb7da5604b8 /app/javascript/themes/glitch/components/autosuggest_textarea.js | |
parent | 5a9982b425d3db65d813eb0314a27cea16f0f52d (diff) |
Forking glitch theme
Diffstat (limited to 'app/javascript/themes/glitch/components/autosuggest_textarea.js')
-rw-r--r-- | app/javascript/themes/glitch/components/autosuggest_textarea.js | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/app/javascript/themes/glitch/components/autosuggest_textarea.js b/app/javascript/themes/glitch/components/autosuggest_textarea.js new file mode 100644 index 000000000..fa93847a2 --- /dev/null +++ b/app/javascript/themes/glitch/components/autosuggest_textarea.js @@ -0,0 +1,222 @@ +import React from 'react'; +import AutosuggestAccountContainer from 'themes/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 'themes/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 + 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; + } + + 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); + } + + onKeyUp = e => { + if (e.key === 'Escape' && this.state.suggestionsHidden) { + document.querySelector('.ui').parentElement.focus(); + } + + if (this.props.onKeyUp) { + this.props.onKeyUp(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 { + 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, 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={this.onKeyUp} + onBlur={this.onBlur} + onPaste={this.onPaste} + style={style} + /> + </label> + + <div className={`autosuggest-textarea__suggestions ${suggestionsHidden || suggestions.isEmpty() ? '' : 'autosuggest-textarea__suggestions--visible'}`}> + {suggestions.map(this.renderSuggestion)} + </div> + </div> + ); + } + +} |