React debug utils

utils.coffee

global.getParentView = do ->
  ReactInstanceMap = require "ReactInstanceMap"
  return (view, level = 1) ->

    unless view._reactInternalInstance
      view = view._currentElement._owner._instance

    parent = ReactInstanceMap.get view
    while parent and --level >= 0
      parent = parent._currentElement._owner

    if parent
    then parent._instance
    else null

global.getParentInstance = do ->
  isNode = require "fbjs/lib/isNode"
  EventPluginUtils = require "react-native/lib/EventPluginUtils"

  getRenderedComponent = (inst) ->
    inst._reactInternalInstance._renderedComponent

  getInstanceFromHost = (host) ->
    host._currentElement._owner._instance

  return (inst, level = 1) ->

    if isNode inst
      node = EventPluginUtils.getInstanceFromNode inst
      inst = getInstanceFromHost node
    else
      node = getRenderedComponent inst

    if level is 0
      return inst

    parent = node
    while parent and --level >= 0
      parent = EventPluginUtils.getParentInstance parent
      return null unless parent
      parentInst = getInstanceFromHost parent

    if inst is parentInst
    then null
    else parentInst