overleaf/services/web/frontend/js/features/editor-navigation-toolbar/components/layout-dropdown-button.js

import PropTypes from 'prop-types'
import { Dropdown, MenuItem } from 'react-bootstrap'
import { Trans, useTranslation } from 'react-i18next'
import Icon from '../../../shared/components/icon'
import IconChecked from '../../../shared/components/icon-checked'
import ControlledDropdown from '../../../shared/components/controlled-dropdown'
import IconEditorOnly from './icon-editor-only'
import IconPdfOnly from './icon-pdf-only'

function IconCheckmark({ iconFor, pdfLayout, view }) {
  if (iconFor === 'editorOnly' && pdfLayout === 'flat' && view === 'editor') {
    return <IconChecked />
  } else if (iconFor === 'pdfOnly' && pdfLayout === 'flat' && view === 'pdf') {
    return <IconChecked />
  } else if (iconFor === 'sideBySide' && pdfLayout === 'sideBySide') {
    return <IconChecked />
  }
  // return empty icon for placeholder
  return <Icon type="" modifier="fw" />
}

function LayoutDropdownButton({ handleChangeLayout, pdfLayout, view }) {
  const { t } = useTranslation()
  // bsStyle is required for Dropdown.Toggle, but we will override style
  return (
    <ControlledDropdown id="layout-dropdown" className="toolbar-item">
      <Dropdown.Toggle className="btn-full-height" bsStyle="link">
        <Icon type="columns" modifier="fw" />
        <span className="toolbar-label">{t('layout')}</span>
      </Dropdown.Toggle>
      <Dropdown.Menu id="layout-dropdown-list">
        <MenuItem header>{t('layout')}</MenuItem>
        <MenuItem onSelect={() => handleChangeLayout('sideBySide')}>
          <IconCheckmark
            iconFor="sideBySide"
            pdfLayout={pdfLayout}
            view={view}
          />
          <Icon type="columns" />
          {t('editor_and_pdf')}
        </MenuItem>
        <MenuItem
          onSelect={() => handleChangeLayout('flat', 'editor')}
          className="menu-item-with-svg"
        >
          <IconCheckmark
            iconFor="editorOnly"
            pdfLayout={pdfLayout}
            view={view}
          />
          <IconEditorOnly />
          <Trans
            i18nKey="editor_only_hide_pdf"
            components={[
              <span key="editor_only_hide_pdf" className="subdued" />,
            ]}
          />
        </MenuItem>
        <MenuItem
          onSelect={() => handleChangeLayout('flat', 'pdf')}
          className="menu-item-with-svg"
        >
          <IconCheckmark iconFor="pdfOnly" pdfLayout={pdfLayout} view={view} />
          <IconPdfOnly />
          <Trans
            i18nKey="pdf_only_hide_editor"
            components={[
              <span key="pdf_only_hide_editor" className="subdued" />,
            ]}
          />
        </MenuItem>
      </Dropdown.Menu>
    </ControlledDropdown>
  )
}

export default LayoutDropdownButton

IconCheckmark.propTypes = {
  iconFor: PropTypes.string.isRequired,
  pdfLayout: PropTypes.string.isRequired,
  view: PropTypes.string,
}

LayoutDropdownButton.propTypes = {
  handleChangeLayout: PropTypes.func.isRequired,
  pdfLayout: PropTypes.string.isRequired,
  view: PropTypes.string,
}