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# ancestry.coffee

lib/psd/nodes/

¶

    _ = require 'lodash'

    module.exports =
      root: ->
        return @ if isRoot()
        return @parent.root()

      isRoot: -> @depth() is 0

      children: -> @_children

      ancestors: ->
        return [] if not @parent? or @parent.isRoot()
        return @parent.ancestors().concat [@parent]

      hasChildren: -> @_children.length > 0
      childless: -> not @hasChildren()

      siblings: ->
        return [] unless @parent?
        @parent.children()

      nextSibling: ->
        return null unless @parent?
        index = @siblings().indexOf(@)
        @siblings()[index + 1]

      prevSibling: ->
        return null unless @parent?
        index = @siblings().indexOf(@)
        @siblings()[index - 1]

      hasSiblings: -> @siblings().length > 1
      onlyChild: -> not @hasSiblings()

      descendants: -> _.flatten @_children.map((n) -> n.subtree())

      subtree: -> [@].concat @descendants()

      depth: -> @ancestors().length + 1

      path: (asArray = false) ->
        path = @ancestors().map((n) -> n.name).concat([@name])
        if asArray then path else path.join('/')

generated Tue May 12 2015 10:08:58 GMT-0400 (EDT)