Mailspring/internal_packages/thread-list/lib/thread-list-toolbar.jsx

import React, {Component, PropTypes} from 'react'
import {MultiselectToolbar} from 'nylas-component-kit'
import InjectsToolbarButtons, {ToolbarRole} from './injects-toolbar-buttons'


class ThreadListToolbar extends Component {
  static displayName = 'ThreadListToolbar';

  static propTypes = {
    items: PropTypes.array,
    selection: PropTypes.shape({
      clear: PropTypes.func,
    }),
    injectedButtons: PropTypes.element,
  };

  onClearSelection = ()=> {
    this.props.selection.clear()
  };

  render() {
    const {injectedButtons, items} = this.props

    return (
      <MultiselectToolbar
        collection="thread"
        selectionCount={items.length}
        toolbarElement={injectedButtons}
        onClearSelection={this.onClearSelection}
      />
    )
  }
}

const toolbarProps = {
  extraRoles: [`ThreadList:${ToolbarRole}`],
}

export default InjectsToolbarButtons(ThreadListToolbar, toolbarProps)