AK-21/Graphite-Industrial-Intelligence

1let Browsers = require('./browsers')2let utils = require('./utils')3let vendor = require('./vendor')4 5/**6 * Recursively clone objects7 */8function clone(obj, parent) {9  let cloned = new obj.constructor()10 11  for (let i of Object.keys(obj || {})) {12    let value = obj[i]13    if (i === 'parent' && typeof value === 'object') {14      if (parent) {15        cloned[i] = parent16      }17    } else if (i === 'source' || i === null) {18      cloned[i] = value19    } else if (Array.isArray(value)) {20      cloned[i] = value.map(x => clone(x, cloned))21    } else if (22      i !== '_autoprefixerPrefix' &&23      i !== '_autoprefixerValues' &&24      i !== 'proxyCache'25    ) {26      if (typeof value === 'object' && value !== null) {27        value = clone(value, cloned)28      }29      cloned[i] = value30    }31  }32 33  return cloned34}35 36class Prefixer {37  constructor(name, prefixes, all) {38    this.prefixes = prefixes39    this.name = name40    this.all = all41  }42 43  /**44   * Clone node and clean autprefixer custom caches45   */46  static clone(node, overrides) {47    let cloned = clone(node)48    for (let name in overrides) {49      cloned[name] = overrides[name]50    }51    return cloned52  }53 54  /**55   * Add hack to selected names56   */57  static hack(klass) {58    if (!this.hacks) {59      this.hacks = {}60    }61    return klass.names.map(name => {62      this.hacks[name] = klass63      return this.hacks[name]64    })65  }66 67  /**68   * Load hacks for some names69   */70  static load(name, prefixes, all) {71    let Klass = this.hacks && this.hacks[name]72    if (Klass) {73      return new Klass(name, prefixes, all)74    } else {75      return new this(name, prefixes, all)76    }77  }78 79  /**80   * Shortcut for Prefixer.clone81   */82  clone(node, overrides) {83    return Prefixer.clone(node, overrides)84  }85 86  /**87   * Find prefix in node parents88   */89  parentPrefix(node) {90    let prefix91 92    if (typeof node._autoprefixerPrefix !== 'undefined') {93      prefix = node._autoprefixerPrefix94    } else if (node.type === 'decl' && node.prop[0] === '-') {95      prefix = vendor.prefix(node.prop)96    } else if (node.type === 'root') {97      prefix = false98    } else if (99      node.type === 'rule' &&100      node.selector.includes(':-') &&101      /:(-\w+-)/.test(node.selector)102    ) {103      prefix = node.selector.match(/:(-\w+-)/)[1]104    } else if (node.type === 'atrule' && node.name[0] === '-') {105      prefix = vendor.prefix(node.name)106    } else {107      prefix = this.parentPrefix(node.parent)108    }109 110    if (!Browsers.prefixes().includes(prefix)) {111      prefix = false112    }113 114    node._autoprefixerPrefix = prefix115 116    return node._autoprefixerPrefix117  }118 119  /**120   * Clone node with prefixes121   */122  process(node, result) {123    if (!this.check(node)) {124      return undefined125    }126 127    let parent = this.parentPrefix(node)128 129    let prefixes = this.prefixes.filter(130      prefix => !parent || parent === utils.removeNote(prefix)131    )132 133    let added = []134    for (let prefix of prefixes) {135      if (this.add(node, prefix, added.concat([prefix]), result)) {136        added.push(prefix)137      }138    }139 140    return added141  }142}143 144module.exports = Prefixer145