content: //  Package imports.
  import classNames from 'classnames';
  import PropTypes from 'prop-types';
  import React from 'react';
  import { connect } from 'react-redux';
  import spring from 'react-motion/lib/spring';
  import {
    injectIntl,
    FormattedMessage,
    defineMessages,
  } from 'react-intl';
  import Overlay from 'react-overlays/lib/Overlay';
  
  //  Components.
  import Icon from 'flavours/glitch/components/icon';
  
  //  Utils.
  import { focusRoot } from 'flavours/glitch/util/dom_helpers';
  import { searchEnabled } from 'flavours/glitch/util/initial_state';
  import Motion from 'flavours/glitch/util/optional_motion';
  
  const messages = defineMessages({
    placeholder: { id: 'search.placeholder', defaultMessage: 'Search' },
  });
  
  class SearchPopout extends React.PureComponent {
  
    static propTypes = {
      style: PropTypes.object,
    };
  
    render () {
      const { style } = this.props;
      const extraInformation = searchEnabled ? <FormattedMessage id='search_popout.tips.full_text' defaultMessage='Simple text returns statuses you have written, favourited, boosted, or have been mentioned in, as well as matching usernames, display names, and hashtags.' /> : <FormattedMessage id='search_popout.tips.text' defaultMessage='Simple text returns matching display names, usernames and hashtags' />;
      return (
        <div style={{ ...style, position: 'absolute', width: 285, zIndex: 2 }}>
          <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 }) => (
              <div className='search-popout' style={{ opacity: opacity, transform: `scale(${scaleX}, ${scaleY})` }}>
                <h4><FormattedMessage id='search_popout.search_format' defaultMessage='Advanced search format' /></h4>
  
                <ul>
                  <li><em>#example</em> <FormattedMessage id='search_popout.tips.hashtag' defaultMessage='hashtag' /></li>
                  <li><em>@username@domain</em> <FormattedMessage id='search_popout.tips.user' defaultMessage='user' /></li>
                  <li><em>URL</em> <FormattedMessage id='search_popout.tips.user' defaultMessage='user' /></li>
                  <li><em>URL</em> <FormattedMessage id='search_popout.tips.status' defaultMessage='status' /></li>
                </ul>
  
                {extraInformation}
              </div>
            )}
          </Motion>
        </div>
      );
    }
  
  }
  
  //  The component.
  export default @injectIntl
  class Search extends React.PureComponent {
  
    static contextTypes = {
      router: PropTypes.object.isRequired,
    };
  
    static propTypes = {
      value: PropTypes.string.isRequired,
      submitted: PropTypes.bool,
      onChange: PropTypes.func.isRequired,
      onSubmit: PropTypes.func.isRequired,
      onClear: PropTypes.func.isRequired,
      onShow: PropTypes.func.isRequired,
      openInRoute: PropTypes.bool,
      intl: PropTypes.object.isRequired,
      singleColumn: PropTypes.bool,
    };
  
    state = {
      expanded: false,
    };
  
    setRef = c => {
      this.searchForm = c;
    }
  
    handleChange = (e) => {
      const { onChange } = this.props;
      if (onChange) {
        onChange(e.target.value);
      }
    }
  
    handleClear = (e) => {
      const {
        onClear,
        submitted,
        value,
      } = this.props;
      e.preventDefault();  //  Prevents focus change ??
      if (onClear && (submitted || value && value.length)) {
        onClear();
      }
    }
  
    handleBlur = () => {
      this.setState({ expanded: false });
    }
  
    handleFocus = () => {
      this.setState({ expanded: true });
      this.props.onShow();
  
      if (this.searchForm && !this.props.singleColumn) {
        const { left, right } = this.searchForm.getBoundingClientRect();
        if (left < 0 || right > (window.innerWidth || document.documentElement.clientWidth)) {
          this.searchForm.scrollIntoView();
        }
      }
    }
  
    handleKeyUp = (e) => {
      const { onSubmit } = this.props;
      switch (e.key) {
      case 'Enter':
        onSubmit();
  
        if (this.props.openInRoute) {
          this.context.router.history.push('/search');
        }
        break;
      case 'Escape':
        focusRoot();
      }
    }
  
    render () {
      const { intl, value, submitted } = this.props;
      const { expanded } = this.state;
      const hasValue = value.length > 0 || submitted;
  
      return (
        <div className='search'>
          <label>
            <span style={{ display: 'none' }}>{intl.formatMessage(messages.placeholder)}</span>
            <input
              ref={this.setRef}
              className='search__input'
              type='text'
              placeholder={intl.formatMessage(messages.placeholder)}
              value={value || ''}
              onChange={this.handleChange}
              onKeyUp={this.handleKeyUp}
              onFocus={this.handleFocus}
              onBlur={this.handleBlur}
            />
          </label>
  
          <div
            aria-label={intl.formatMessage(messages.placeholder)}
            className='search__icon'
            onClick={this.handleClear}
            role='button'
            tabIndex='0'
          >
            <Icon id='search' className={hasValue ? '' : 'active'} />
            <Icon id='times-circle' className={hasValue ? 'active' : ''} />
          </div>
  
          <Overlay show={expanded && !hasValue} placement='bottom' target={this}>
            <SearchPopout />
          </Overlay>
        </div>
      );
    }
  
  }
  