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path: root/ui/app/components/menu-droppo.js
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const Component = require('react').Component
const h = require('react-hyperscript')
const inherits = require('util').inherits
const findDOMNode = require('react-dom').findDOMNode
const ReactCSSTransitionGroup = require('react-addons-css-transition-group')

module.exports = MenuDroppoComponent


inherits(MenuDroppoComponent, Component)
function MenuDroppoComponent () {
  Component.call(this)
}

MenuDroppoComponent.prototype.render = function () {
  const speed = this.props.speed || '300ms'
  const useCssTransition = this.props.useCssTransition
  const zIndex = ('zIndex' in this.props) ? this.props.zIndex : 0

  this.manageListeners()

  let style = this.props.style || {}
  if (!('position' in style)) {
    style.position = 'fixed'
  }
  style.zIndex = zIndex

  return (
    h('.menu-droppo-container', {
      style,
    }, [
      h('style', `
        .menu-droppo-enter {
          transition: transform ${speed} ease-in-out;
          transform: translateY(-200%);
        }

        .menu-droppo-enter.menu-droppo-enter-active {
          transition: transform ${speed} ease-in-out;
          transform: translateY(0%);
        }

        .menu-droppo-leave {
          transition: transform ${speed} ease-in-out;
          transform: translateY(0%);
        }

        .menu-droppo-leave.menu-droppo-leave-active {
          transition: transform ${speed} ease-in-out;
          transform: translateY(-200%);
        }
      `),

      useCssTransition
        ? h(ReactCSSTransitionGroup, {
          className: 'css-transition-group',
          transitionName: 'menu-droppo',
          transitionEnterTimeout: parseInt(speed),
          transitionLeaveTimeout: parseInt(speed),
        }, this.renderPrimary())
        : this.renderPrimary(),
    ])
  )
}

MenuDroppoComponent.prototype.renderPrimary = function () {
  const isOpen = this.props.isOpen
  if (!isOpen) {
    return null
  }

  const innerStyle = this.props.innerStyle || {}

  return (
    h('.menu-droppo', {
      key: 'menu-droppo-drawer',
      style: innerStyle,
    },
    [ this.props.children ])
  )
}

MenuDroppoComponent.prototype.manageListeners = function () {
  const isOpen = this.props.isOpen
  const onClickOutside = this.props.onClickOutside

  if (isOpen) {
    this.outsideClickHandler = onClickOutside
  } else if (isOpen) {
    this.outsideClickHandler = null
  }
}

MenuDroppoComponent.prototype.componentDidMount = function () {
  if (this && document.body) {
    this.globalClickHandler = this.globalClickOccurred.bind(this)
    document.body.addEventListener('click', this.globalClickHandler)
    var container = findDOMNode(this)
    this.container = container
  }
}

MenuDroppoComponent.prototype.componentWillUnmount = function () {
  if (this && document.body) {
    document.body.removeEventListener('click', this.globalClickHandler)
  }
}

MenuDroppoComponent.prototype.globalClickOccurred = function (event) {
  const target = event.target
  const container = findDOMNode(this)

  if (target !== container &&
    !isDescendant(this.container, event.target) &&
    this.outsideClickHandler) {
    this.outsideClickHandler(event)
  }
}

function isDescendant (parent, child) {
  var node = child.parentNode
  while (node !== null) {
    if (node === parent) {
      return true
    }
    node = node.parentNode
  }

  return false
}