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Filename : justify-content.js

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let flexSpec = require('./flex-spec')
let Declaration = require('../declaration')

class JustifyContent extends Declaration {
  /**
   * Return property name by final spec
   */
  normalize() {
    return 'justify-content'
  }

  /**
   * Change property name for 2009 and 2012 specs
   */
  prefixed(prop, prefix) {
    let spec
    ;[spec, prefix] = flexSpec(prefix)
    if (spec === 2009) {
      return prefix + 'box-pack'
    }
    if (spec === 2012) {
      return prefix + 'flex-pack'
    }
    return super.prefixed(prop, prefix)
  }

  /**
   * Change value for 2009 and 2012 specs
   */
  set(decl, prefix) {
    let spec = flexSpec(prefix)[0]
    if (spec === 2009 || spec === 2012) {
      let value = JustifyContent.oldValues[decl.value] || decl.value
      decl.value = value
      if (spec !== 2009 || value !== 'distribute') {
        return super.set(decl, prefix)
      }
    } else if (spec === 'final') {
      return super.set(decl, prefix)
    }
    return undefined
  }
}

JustifyContent.names = ['justify-content', 'flex-pack', 'box-pack']

JustifyContent.oldValues = {
  'flex-end': 'end',
  'flex-start': 'start',
  'space-around': 'distribute',
  'space-between': 'justify'
}

module.exports = JustifyContent