Add language dropdown to compose in web UI (#18420)

app/javascript/mastodon/features/compose/components/compose_form.js

@@ -15,6 +15,7 @@ import EmojiPickerDropdown from '../containers/emoji_picker_dropdown_container';
 import PollFormContainer from '../containers/poll_form_container';
 import UploadFormContainer from '../containers/upload_form_container';
 import WarningContainer from '../containers/warning_container';
+import LanguageDropdown from '../containers/language_dropdown_container';
 import { isMobile } from '../../../is_mobile';
 import ImmutablePureComponent from 'react-immutable-pure-component';
 import { length } from 'stringz';
@@ -204,6 +205,7 @@ class ComposeForm extends ImmutablePureComponent {
   render () {
     const { intl, onPaste, showSearch } = this.props;
     const disabled = this.props.isSubmitting;
+
     let publishText = '';
 
     if (this.props.isEditing) {
@@ -254,6 +256,7 @@ class ComposeForm extends ImmutablePureComponent {
           autoFocus={!showSearch && !isMobile(window.innerWidth)}
         >
           <EmojiPickerDropdown onPickEmoji={this.handleEmojiPick} />
+
           <div className='compose-form__modifiers'>
             <UploadFormContainer />
             <PollFormContainer />
@@ -266,12 +269,18 @@ class ComposeForm extends ImmutablePureComponent {
             <PollButtonContainer />
             <PrivacyDropdownContainer disabled={this.props.isEditing} />
             <SpoilerButtonContainer />
+            <LanguageDropdown />
+          </div>
+
+          <div className='character-counter__wrapper'>
+            <CharacterCounter max={500} text={this.getFulltextForCharacterCounting()} />
           </div>
-          <div className='character-counter__wrapper'><CharacterCounter max={500} text={this.getFulltextForCharacterCounting()} /></div>
         </div>
 
         <div className='compose-form__publish'>
-          <div className='compose-form__publish-button-wrapper'><Button text={publishText} onClick={this.handleSubmit} disabled={!this.canSubmit()} block /></div>
+          <div className='compose-form__publish-button-wrapper'>
+            <Button text={publishText} onClick={this.handleSubmit} disabled={!this.canSubmit()} block />
+          </div>
         </div>
       </div>
     );

app/javascript/mastodon/features/compose/components/language_dropdown.js

@@ -0,0 +1,332 @@
+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/lib/Overlay';
+import Motion from 'mastodon/features/ui/util/optional_motion';
+import spring from 'react-motion/lib/spring';
+import { supportsPassiveEvents } from 'detect-passive-events';
+import classNames from 'classnames';
+import { languages as preloadedLanguages } from 'mastodon/initial_state';
+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' },
+});
+
+// Copied from emoji-mart for consistency with emoji picker and since
+// they don't export the icons in the package
+const icons = {
+  loupe: (
+    <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' width='13' height='13'>
+      <path d='M12.9 14.32a8 8 0 1 1 1.41-1.41l5.35 5.33-1.42 1.42-5.33-5.34zM8 14A6 6 0 1 0 8 2a6 6 0 0 0 0 12z' />
+    </svg>
+  ),
+
+  delete: (
+    <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' width='13' height='13'>
+      <path d='M10 8.586L2.929 1.515 1.515 2.929 8.586 10l-7.071 7.071 1.414 1.414L10 11.414l7.071 7.071 1.414-1.414L11.414 10l7.071-7.071-1.414-1.414L10 8.586z' />
+    </svg>
+  ),
+};
+
+const listenerOptions = supportsPassiveEvents ? { passive: true } : false;
+
+class LanguageDropdownMenu extends React.PureComponent {
+
+  static propTypes = {
+    style: PropTypes.object,
+    value: PropTypes.string.isRequired,
+    frequentlyUsedLanguages: PropTypes.arrayOf(PropTypes.string).isRequired,
+    placement: 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 = {
+    mounted: false,
+    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);
+    this.setState({ mounted: true });
+  }
+
+  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[2]}</span> <span className='language-dropdown__dropdown__results__item__common-name'>({lang[1]})</span>
+      </div>
+    );
+  }
+
+  render () {
+    const { style, placement, intl } = this.props;
+    const { mounted, searchValue } = this.state;
+    const isSearching = searchValue !== '';
+    const results = this.search();
+
+    return (
+      <Motion defaultStyle={{ opacity: 0, scaleX: 0.85, scaleY: 0.75 }} style={{ opacity: spring(1, { damping: 35, stiffness: 400 }), scaleX: spring(1, { damping: 35, stiffness: 400 }), scaleY: spring(1, { damping: 35, stiffness: 400 }) }}>
+        {({ opacity, scaleX, scaleY }) => (
+          // It should not be transformed when mounting because the resulting
+          // size will be used to determine the coordinate of the menu by
+          // react-overlays
+          <div className={`language-dropdown__dropdown ${placement}`} style={{ ...style, opacity: opacity, transform: mounted ? `scale(${scaleX}, ${scaleY})` : null }} ref={this.setRef}>
+            <div className='emoji-mart-search'>
+              <input type='search' value={searchValue} onChange={this.handleSearchChange} onKeyDown={this.handleSearchKeyDown} placeholder={intl.formatMessage(messages.search)} autoFocus />
+              <button className='emoji-mart-search-icon' disabled={!isSearching} aria-label={intl.formatMessage(messages.clear)} onClick={this.handleClear}>{!isSearching ? icons.loupe : icons.delete}</button>
+            </div>
+
+            <div className='language-dropdown__dropdown__results emoji-mart-scroll' role='listbox' ref={this.setListRef}>
+              {results.map(this.renderItem)}
+            </div>
+          </div>
+        )}
+      </Motion>
+    );
+  }
+
+}
+
+export default @injectIntl
+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 = ({ target }) => {
+    const { top } = target.getBoundingClientRect();
+
+    if (this.state.open && this.activeElement) {
+      this.activeElement.focus({ preventScroll: true });
+    }
+
+    this.setState({ placement: top * 2 < innerHeight ? 'bottom' : 'top' });
+    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);
+  }
+
+  render () {
+    const { value, intl, frequentlyUsedLanguages } = this.props;
+    const { open, placement } = this.state;
+
+    return (
+      <div className={classNames('privacy-dropdown', { active: open })}>
+        <div className='privacy-dropdown__value'>
+          <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={placement} target={this}>
+          <LanguageDropdownMenu
+            value={value}
+            frequentlyUsedLanguages={frequentlyUsedLanguages}
+            onClose={this.handleClose}
+            onChange={this.handleChange}
+            placement={placement}
+            intl={intl}
+          />
+        </Overlay>
+      </div>
+    );
+  }
+
+}

app/javascript/mastodon/features/compose/components/text_icon_button.js

@@ -17,11 +17,6 @@ export default class TextIconButton extends React.PureComponent {
     ariaControls: PropTypes.string,
   };
 
-  handleClick = (e) => {
-    e.preventDefault();
-    this.props.onClick();
-  }
-
   render () {
     const { label, title, active, ariaControls } = this.props;
 
@@ -31,7 +26,7 @@ export default class TextIconButton extends React.PureComponent {
         aria-label={title}
         className={`text-icon-button ${active ? 'active' : ''}`}
         aria-expanded={active}
-        onClick={this.handleClick}
+        onClick={this.props.onClick}
         aria-controls={ariaControls} style={iconStyle}
       >
         {label}