about summary refs log tree commit diff
path: root/app/javascript/flavours/glitch/components/autosuggest_input.js
blob: 1a030fb858369b773d4ac0479c66b1ecee75768c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
import React from 'react';
import AutosuggestAccountContainer from 'flavours/glitch/features/compose/containers/autosuggest_account_container';
import AutosuggestEmoji from './autosuggest_emoji';
import AutosuggestHashtag from './autosuggest_hashtag';
import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import ImmutablePureComponent from 'react-immutable-pure-component';
import classNames from 'classnames';

const textAtCursorMatchesToken = (str, caretPosition, searchTokens) => {
  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 || searchTokens.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 AutosuggestInput 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,
    autoFocus: PropTypes.bool,
    className: PropTypes.string,
    id: PropTypes.string,
    searchTokens: PropTypes.arrayOf(PropTypes.string),
    maxLength: PropTypes.number,
    lang: PropTypes.string,
    spellCheck: PropTypes.string,
  };

  static defaultProps = {
    autoFocus: true,
    searchTokens: ['@', ':', '#'],
  };

  state = {
    suggestionsHidden: true,
    focused: false,
    selectedSuggestion: 0,
    lastToken: null,
    tokenStart: 0,
  };

  onChange = (e) => {
    const [ tokenStart, token ] = textAtCursorMatchesToken(e.target.value, e.target.selectionStart, this.props.searchTokens);

    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, focused: false });
  };

  onFocus = () => {
    this.setState({ focused: 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.input.focus();
  };

  componentWillReceiveProps (nextProps) {
    if (nextProps.suggestions !== this.props.suggestions && nextProps.suggestions.size > 0 && this.state.suggestionsHidden && this.state.focused) {
      this.setState({ suggestionsHidden: false });
    }
  }

  setInput = (c) => {
    this.input = c;
  };

  renderSuggestion = (suggestion, i) => {
    const { selectedSuggestion } = this.state;
    let inner, key;

    if (suggestion.type === 'emoji') {
      inner = <AutosuggestEmoji emoji={suggestion} />;
      key   = suggestion.id;
    } else if (suggestion.type ==='hashtag') {
      inner = <AutosuggestHashtag tag={suggestion} />;
      key   = suggestion.name;
    } else if (suggestion.type === 'account') {
      inner = <AutosuggestAccountContainer id={suggestion.id} />;
      key   = suggestion.id;
    }

    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, className, id, maxLength, lang, spellCheck } = this.props;
    const { suggestionsHidden } = this.state;

    return (
      <div className='autosuggest-input'>
        <label>
          <span style={{ display: 'none' }}>{placeholder}</span>

          <input
            type='text'
            ref={this.setInput}
            disabled={disabled}
            placeholder={placeholder}
            autoFocus={autoFocus}
            value={value}
            onChange={this.onChange}
            onKeyDown={this.onKeyDown}
            onKeyUp={onKeyUp}
            onFocus={this.onFocus}
            onBlur={this.onBlur}
            dir='auto'
            aria-autocomplete='list'
            id={id}
            className={className}
            maxLength={maxLength}
            lang={lang}
            spellCheck={spellCheck}
          />
        </label>

        <div className={`autosuggest-textarea__suggestions ${suggestionsHidden || suggestions.isEmpty() ? '' : 'autosuggest-textarea__suggestions--visible'}`}>
          {suggestions.map(this.renderSuggestion)}
        </div>
      </div>
    );
  }

}