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Viewing file:     flex-direction.js (1.75 KB)      -rw-r--r--

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

class FlexDirection extends Declaration {
  /**
   * Return property name by final spec
   */
  normalize() {
    return 'flex-direction'
  }

  /**
   * Use two properties for 2009 spec
   */
  insert(decl, prefix, prefixes) {
    let spec
    ;[spec, prefix] = flexSpec(prefix)
    if (spec !== 2009) {
      return super.insert(decl, prefix, prefixes)
    }
    let already = decl.parent.some(
      i =>
        i.prop === prefix + 'box-orient' || i.prop === prefix + 'box-direction'
    )
    if (already) {
      return undefined
    }

    let v = decl.value
    let orient, dir
    if (v === 'inherit' || v === 'initial' || v === 'unset') {
      orient = v
      dir = v
    } else {
      orient = v.includes('row') ? 'horizontal' : 'vertical'
      dir = v.includes('reverse') ? 'reverse' : 'normal'
    }

    let cloned = this.clone(decl)
    cloned.prop = prefix + 'box-orient'
    cloned.value = orient
    if (this.needCascade(decl)) {
      cloned.raws.before = this.calcBefore(prefixes, decl, prefix)
    }
    decl.parent.insertBefore(decl, cloned)

    cloned = this.clone(decl)
    cloned.prop = prefix + 'box-direction'
    cloned.value = dir
    if (this.needCascade(decl)) {
      cloned.raws.before = this.calcBefore(prefixes, decl, prefix)
    }
    return decl.parent.insertBefore(decl, cloned)
  }

  /**
   * Clean two properties for 2009 spec
   */
  old(prop, prefix) {
    let spec
    ;[spec, prefix] = flexSpec(prefix)
    if (spec === 2009) {
      return [prefix + 'box-orient', prefix + 'box-direction']
    } else {
      return super.old(prop, prefix)
    }
  }
}

FlexDirection.names = ['flex-direction', 'box-direction', 'box-orient']

module.exports = FlexDirection