AK-21/Graphite-Industrial-Intelligence

1let Browsers = require('./browsers')2let Prefixer = require('./prefixer')3let utils = require('./utils')4 5class Declaration extends Prefixer {6  /**7   * Clone and add prefixes for declaration8   */9  add(decl, prefix, prefixes, result) {10    let prefixed = this.prefixed(decl.prop, prefix)11    if (12      this.isAlready(decl, prefixed) ||13      this.otherPrefixes(decl.value, prefix)14    ) {15      return undefined16    }17    return this.insert(decl, prefix, prefixes, result)18  }19 20  /**21   * Calculate indentation to create visual cascade22   */23  calcBefore(prefixes, decl, prefix = '') {24    let max = this.maxPrefixed(prefixes, decl)25    let diff = max - utils.removeNote(prefix).length26 27    let before = decl.raw('before')28    if (diff > 0) {29      before += Array(diff).fill(' ').join('')30    }31 32    return before33  }34 35  /**36   * Always true, because we already get prefixer by property name37   */38  check(/* decl */) {39    return true40  }41 42  /**43   * Clone and insert new declaration44   */45  insert(decl, prefix, prefixes) {46    let cloned = this.set(this.clone(decl), prefix)47    if (!cloned) return undefined48 49    let already = decl.parent.some(50      i => i.prop === cloned.prop && i.value === cloned.value51    )52    if (already) {53      return undefined54    }55 56    if (this.needCascade(decl)) {57      cloned.raws.before = this.calcBefore(prefixes, decl, prefix)58    }59    return decl.parent.insertBefore(decl, cloned)60  }61 62  /**63   * Did this declaration has this prefix above64   */65  isAlready(decl, prefixed) {66    let already = this.all.group(decl).up(i => i.prop === prefixed)67    if (!already) {68      already = this.all.group(decl).down(i => i.prop === prefixed)69    }70    return already71  }72 73  /**74   * Return maximum length of possible prefixed property75   */76  maxPrefixed(prefixes, decl) {77    if (decl._autoprefixerMax) {78      return decl._autoprefixerMax79    }80 81    let max = 082    for (let prefix of prefixes) {83      prefix = utils.removeNote(prefix)84      if (prefix.length > max) {85        max = prefix.length86      }87    }88    decl._autoprefixerMax = max89 90    return decl._autoprefixerMax91  }92 93  /**94   * Should we use visual cascade for prefixes95   */96  needCascade(decl) {97    if (!decl._autoprefixerCascade) {98      decl._autoprefixerCascade =99        this.all.options.cascade !== false && decl.raw('before').includes('\n')100    }101    return decl._autoprefixerCascade102  }103 104  /**105   * Return unprefixed version of property106   */107  normalize(prop) {108    return prop109  }110 111  /**112   * Return list of prefixed properties to clean old prefixes113   */114  old(prop, prefix) {115    return [this.prefixed(prop, prefix)]116  }117 118  /**119   * Check `value`, that it contain other prefixes, rather than `prefix`120   */121  otherPrefixes(value, prefix) {122    for (let other of Browsers.prefixes()) {123      if (other === prefix) {124        continue125      }126      if (value.includes(other)) {127        return value.replace(/var\([^)]+\)/, '').includes(other)128      }129    }130    return false131  }132 133  /**134   * Return prefixed version of property135   */136  prefixed(prop, prefix) {137    return prefix + prop138  }139 140  /**141   * Add spaces for visual cascade142   */143  process(decl, result) {144    if (!this.needCascade(decl)) {145      super.process(decl, result)146      return147    }148 149    let prefixes = super.process(decl, result)150 151    if (!prefixes || !prefixes.length) {152      return153    }154 155    this.restoreBefore(decl)156    decl.raws.before = this.calcBefore(prefixes, decl)157  }158 159  /**160   * Remove visual cascade161   */162  restoreBefore(decl) {163    let lines = decl.raw('before').split('\n')164    let min = lines[lines.length - 1]165 166    this.all.group(decl).up(prefixed => {167      let array = prefixed.raw('before').split('\n')168      let last = array[array.length - 1]169      if (last.length < min.length) {170        min = last171      }172    })173 174    lines[lines.length - 1] = min175    decl.raws.before = lines.join('\n')176  }177 178  /**179   * Set prefix to declaration180   */181  set(decl, prefix) {182    decl.prop = this.prefixed(decl.prop, prefix)183    return decl184  }185}186 187module.exports = Declaration188