sketch-draw-slice-over-selection/src/draw-slice-over-selection/draw-slice-over-selection.js

A Sketch plugin to draw a slice over the selection

import {
  addLayersToCurrentPage,
  getLayersOnCurrentPage,
  getSelectedLayers,
  getSettings,
  showErrorMessage,
  showSuccessMessage
} from 'sketch-plugin-helper'

import calculateMaximumBounds from './calculate-maximum-bounds'
import createSliceLayer from './create-slice-layer'

export default function drawSliceOverSelection ({ settings }) {
  settings = settings || getSettings()
  const selectedLayers = getSelectedLayers()
  const hasSelection = selectedLayers.length > 0
  const layers = hasSelection ? selectedLayers : getLayersOnCurrentPage()
  if (layers.length === 0) {
    showErrorMessage('No layers')
    return
  }
  const maximumBounds = calculateMaximumBounds(layers)
  const { backgroundColor, padding } = settings
  const sliceLayer = createSliceLayer({
    maximumBounds,
    backgroundColor,
    padding
  })
  addLayersToCurrentPage([sliceLayer])
  showSuccessMessage(
    `Drew slice over ${hasSelection ? 'selection' : 'all layers'}`
  )
}