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node_modules/postcss/lib/root.js 1.21 KB
7820380e   “wangming”   1
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  'use strict'
  
  let Container = require('./container')
  
  let LazyResult, Processor
  
  class Root extends Container {
    constructor(defaults) {
      super(defaults)
      this.type = 'root'
      if (!this.nodes) this.nodes = []
    }
  
    normalize(child, sample, type) {
      let nodes = super.normalize(child)
  
      if (sample) {
        if (type === 'prepend') {
          if (this.nodes.length > 1) {
            sample.raws.before = this.nodes[1].raws.before
          } else {
            delete sample.raws.before
          }
        } else if (this.first !== sample) {
          for (let node of nodes) {
            node.raws.before = sample.raws.before
          }
        }
      }
  
      return nodes
    }
  
    removeChild(child, ignore) {
      let index = this.index(child)
  
      if (!ignore && index === 0 && this.nodes.length > 1) {
        this.nodes[1].raws.before = this.nodes[index].raws.before
      }
  
      return super.removeChild(child)
    }
  
    toResult(opts = {}) {
      let lazy = new LazyResult(new Processor(), this, opts)
      return lazy.stringify()
    }
  }
  
  Root.registerLazyResult = dependant => {
    LazyResult = dependant
  }
  
  Root.registerProcessor = dependant => {
    Processor = dependant
  }
  
  module.exports = Root
  Root.default = Root
  
  Container.registerRoot(Root)