SVG.ClipPath = SVG.invent({
  // Initialize node
  create: 'clipPath',

  // Inherit from
  inherit: SVG.Container,

  // Add class methods
  extend: {
    // Unclip all clipped elements and remove itself
    remove: function () {
      // unclip all targets
      this.targets().forEach(function (el) {
        el.unclip()
      })

      // remove clipPath from parent
      return SVG.Element.prototype.remove.call(this)
    },

    targets: function () {
      return SVG.select('svg [clip-path*="' + this.id() + '"]')
    }
  },

  // Add parent method
  construct: {
    // Create clipping element
    clip: function () {
      return this.defs().put(new SVG.ClipPath())
    }
  }
})

//
SVG.extend(SVG.Element, {
  // Distribute clipPath to svg element
  clipWith: function (element) {
    // use given clip or create a new one
    var clipper = element instanceof SVG.ClipPath ? element : this.parent().clip().add(element)

    // apply mask
    return this.attr('clip-path', 'url("#' + clipper.id() + '")')
  },
  // Unclip element
  unclip: function () {
    return this.attr('clip-path', null)
  },
  clipper: function () {
    return this.reference('clip-path')
  }

})