1 files changed, 328 insertions, 0 deletions
diff --git a/app/javascript/flavours/glitch/features/compose/components/language_dropdown.jsx b/app/javascript/flavours/glitch/features/compose/components/language_dropdown.jsx
new file mode 100644
index 000000000..05614de01
--- /dev/null
+++ b/app/javascript/flavours/glitch/features/compose/components/language_dropdown.jsx
@@ -0,0 +1,328 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { injectIntl, defineMessages } from 'react-intl';
+import TextIconButton from './text_icon_button';
+import Overlay from 'react-overlays/Overlay';
+import { supportsPassiveEvents } from 'detect-passive-events';
+import classNames from 'classnames';
+import { languages as preloadedLanguages } from 'flavours/glitch/initial_state';
+import { loupeIcon, deleteIcon } from 'flavours/glitch/utils/icons';
+import fuzzysort from 'fuzzysort';
+
+const messages = defineMessages({
+  changeLanguage: { id: 'compose.language.change', defaultMessage: 'Change language' },
+  search: { id: 'compose.language.search', defaultMessage: 'Search languages...' },
+  clear: { id: 'emoji_button.clear', defaultMessage: 'Clear' },
+});
+
+const listenerOptions = supportsPassiveEvents ? { passive: true } : false;
+
+class LanguageDropdownMenu extends React.PureComponent {
+
+  static propTypes = {
+    value: PropTypes.string.isRequired,
+    frequentlyUsedLanguages: PropTypes.arrayOf(PropTypes.string).isRequired,
+    onClose: PropTypes.func.isRequired,
+    onChange: PropTypes.func.isRequired,
+    languages: PropTypes.arrayOf(PropTypes.arrayOf(PropTypes.string)),
+    intl: PropTypes.object,
+  };
+
+  static defaultProps = {
+    languages: preloadedLanguages,
+  };
+
+  state = {
+    searchValue: '',
+  };
+
+  handleDocumentClick = e => {
+    if (this.node && !this.node.contains(e.target)) {
+      this.props.onClose();
+    }
+  };
+
+  componentDidMount () {
+    document.addEventListener('click', this.handleDocumentClick, false);
+    document.addEventListener('touchend', this.handleDocumentClick, listenerOptions);
+
+    // Because of https://github.com/react-bootstrap/react-bootstrap/issues/2614 we need
+    // to wait for a frame before focusing
+    requestAnimationFrame(() => {
+      if (this.node) {
+        const element = this.node.querySelector('input[type="search"]');
+        if (element) element.focus();
+      }
+    });
+  }
+
+  componentWillUnmount () {
+    document.removeEventListener('click', this.handleDocumentClick, false);
+    document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions);
+  }
+
+  setRef = c => {
+    this.node = c;
+  };
+
+  setListRef = c => {
+    this.listNode = c;
+  };
+
+  handleSearchChange = ({ target }) => {
+    this.setState({ searchValue: target.value });
+  };
+
+  search () {
+    const { languages, value, frequentlyUsedLanguages } = this.props;
+    const { searchValue } = this.state;
+
+    if (searchValue === '') {
+      return [...languages].sort((a, b) => {
+        // Push current selection to the top of the list
+
+        if (a[0] === value) {
+          return -1;
+        } else if (b[0] === value) {
+          return 1;
+        } else {
+          // Sort according to frequently used languages
+
+          const indexOfA = frequentlyUsedLanguages.indexOf(a[0]);
+          const indexOfB = frequentlyUsedLanguages.indexOf(b[0]);
+
+          return ((indexOfA > -1 ? indexOfA : Infinity) - (indexOfB > -1 ? indexOfB : Infinity));
+        }
+      });
+    }
+
+    return fuzzysort.go(searchValue, languages, {
+      keys: ['0', '1', '2'],
+      limit: 5,
+      threshold: -10000,
+    }).map(result => result.obj);
+  }
+
+  frequentlyUsed () {
+    const { languages, value } = this.props;
+    const current = languages.find(lang => lang[0] === value);
+    const results = [];
+
+    if (current) {
+      results.push(current);
+    }
+
+    return results;
+  }
+
+  handleClick = e => {
+    const value = e.currentTarget.getAttribute('data-index');
+
+    e.preventDefault();
+
+    this.props.onClose();
+    this.props.onChange(value);
+  };
+
+  handleKeyDown = e => {
+    const { onClose } = this.props;
+    const index = Array.from(this.listNode.childNodes).findIndex(node => node === e.currentTarget);
+
+    let element = null;
+
+    switch(e.key) {
+    case 'Escape':
+      onClose();
+      break;
+    case 'Enter':
+      this.handleClick(e);
+      break;
+    case 'ArrowDown':
+      element = this.listNode.childNodes[index + 1] || this.listNode.firstChild;
+      break;
+    case 'ArrowUp':
+      element = this.listNode.childNodes[index - 1] || this.listNode.lastChild;
+      break;
+    case 'Tab':
+      if (e.shiftKey) {
+        element = this.listNode.childNodes[index - 1] || this.listNode.lastChild;
+      } else {
+        element = this.listNode.childNodes[index + 1] || this.listNode.firstChild;
+      }
+      break;
+    case 'Home':
+      element = this.listNode.firstChild;
+      break;
+    case 'End':
+      element = this.listNode.lastChild;
+      break;
+    }
+
+    if (element) {
+      element.focus();
+      e.preventDefault();
+      e.stopPropagation();
+    }
+  };
+
+  handleSearchKeyDown = e => {
+    const { onChange, onClose } = this.props;
+    const { searchValue } = this.state;
+
+    let element = null;
+
+    switch(e.key) {
+    case 'Tab':
+    case 'ArrowDown':
+      element = this.listNode.firstChild;
+
+      if (element) {
+        element.focus();
+        e.preventDefault();
+        e.stopPropagation();
+      }
+
+      break;
+    case 'Enter':
+      element = this.listNode.firstChild;
+
+      if (element) {
+        onChange(element.getAttribute('data-index'));
+        onClose();
+      }
+      break;
+    case 'Escape':
+      if (searchValue !== '') {
+        e.preventDefault();
+        this.handleClear();
+      }
+
+      break;
+    }
+  };
+
+  handleClear = () => {
+    this.setState({ searchValue: '' });
+  };
+
+  renderItem = lang => {
+    const { value } = this.props;
+
+    return (
+      <div key={lang[0]} role='option' tabIndex={0} data-index={lang[0]} className={classNames('language-dropdown__dropdown__results__item', { active: lang[0] === value })} aria-selected={lang[0] === value} onClick={this.handleClick} onKeyDown={this.handleKeyDown}>
+        <span className='language-dropdown__dropdown__results__item__native-name' lang={lang[0]}>{lang[2]}</span> <span className='language-dropdown__dropdown__results__item__common-name'>({lang[1]})</span>
+      </div>
+    );
+  };
+
+  render () {
+    const { intl } = this.props;
+    const { searchValue } = this.state;
+    const isSearching = searchValue !== '';
+    const results = this.search();
+
+    return (
+      <div ref={this.setRef}>
+        <div className='emoji-mart-search'>
+          <input type='search' value={searchValue} onChange={this.handleSearchChange} onKeyDown={this.handleSearchKeyDown} placeholder={intl.formatMessage(messages.search)} />
+          <button type='button' className='emoji-mart-search-icon' disabled={!isSearching} aria-label={intl.formatMessage(messages.clear)} onClick={this.handleClear}>{!isSearching ? loupeIcon : deleteIcon}</button>
+        </div>
+
+        <div className='language-dropdown__dropdown__results emoji-mart-scroll' role='listbox' ref={this.setListRef}>
+          {results.map(this.renderItem)}
+        </div>
+      </div>
+    );
+  }
+
+}
+
+class LanguageDropdown extends React.PureComponent {
+
+  static propTypes = {
+    value: PropTypes.string,
+    frequentlyUsedLanguages: PropTypes.arrayOf(PropTypes.string),
+    intl: PropTypes.object.isRequired,
+    onChange: PropTypes.func,
+    onClose: PropTypes.func,
+  };
+
+  state = {
+    open: false,
+    placement: 'bottom',
+  };
+
+  handleToggle = () => {
+    if (this.state.open && this.activeElement) {
+      this.activeElement.focus({ preventScroll: true });
+    }
+
+    this.setState({ open: !this.state.open });
+  };
+
+  handleClose = () => {
+    const { value, onClose } = this.props;
+
+    if (this.state.open && this.activeElement) {
+      this.activeElement.focus({ preventScroll: true });
+    }
+
+    this.setState({ open: false });
+    onClose(value);
+  };
+
+  handleChange = value => {
+    const { onChange } = this.props;
+    onChange(value);
+  };
+
+  setTargetRef = c => {
+    this.target = c;
+  };
+
+  findTarget = () => {
+    return this.target;
+  };
+
+  handleOverlayEnter = (state) => {
+    this.setState({ placement: state.placement });
+  };
+
+  render () {
+    const { value, intl, frequentlyUsedLanguages } = this.props;
+    const { open, placement } = this.state;
+
+    return (
+      <div className={classNames('privacy-dropdown', placement, { active: open })}>
+        <div className='privacy-dropdown__value' ref={this.setTargetRef} >
+          <TextIconButton
+            className='privacy-dropdown__value-icon'
+            label={value && value.toUpperCase()}
+            title={intl.formatMessage(messages.changeLanguage)}
+            active={open}
+            onClick={this.handleToggle}
+          />
+        </div>
+
+        <Overlay show={open} placement={'bottom'} flip target={this.findTarget} popperConfig={{ strategy: 'fixed', onFirstUpdate: this.handleOverlayEnter }}>
+          {({ props, placement }) => (
+            <div {...props}>
+              <div className={`dropdown-animation language-dropdown__dropdown ${placement}`} >
+                <LanguageDropdownMenu
+                  value={value}
+                  frequentlyUsedLanguages={frequentlyUsedLanguages}
+                  onClose={this.handleClose}
+                  onChange={this.handleChange}
+                  intl={intl}
+                />
+              </div>
+            </div>
+          )}
+        </Overlay>
+      </div>
+    );
+  }
+
+}
+
+export default injectIntl(LanguageDropdown);