"use strict"; exports.__esModule = true; exports.default = void 0; var _declaration = _interopRequireDefault(require("./declaration")); var _comment = _interopRequireDefault(require("./comment")); var _node = _interopRequireDefault(require("./node")); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } it = o[Symbol.iterator](); return it.next.bind(it); } function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); } function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; } function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; } function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; } function cleanSource(nodes) { return nodes.map(function (i) { if (i.nodes) i.nodes = cleanSource(i.nodes); delete i.source; return i; }); } /** * The {@link Root}, {@link AtRule}, and {@link Rule} container nodes * inherit some common methods to help work with their children. * * Note that all containers can store any content. If you write a rule inside * a rule, PostCSS will parse it. * * @extends Node * @abstract */ var Container = /*#__PURE__*/function (_Node) { _inheritsLoose(Container, _Node); function Container() { return _Node.apply(this, arguments) || this; } var _proto = Container.prototype; _proto.push = function push(child) { child.parent = this; this.nodes.push(child); return this; } /** * Iterates through the container’s immediate children, * calling `callback` for each child. * * Returning `false` in the callback will break iteration. * * This method only iterates through the container’s immediate children. * If you need to recursively iterate through all the container’s descendant * nodes, use {@link Container#walk}. * * Unlike the for `{}`-cycle or `Array#forEach` this iterator is safe * if you are mutating the array of child nodes during iteration. * PostCSS will adjust the current index to match the mutations. * * @param {childIterator} callback Iterator receives each node and index. * * @return {false|undefined} Returns `false` if iteration was broke. * * @example * const root = postcss.parse('a { color: black; z-index: 1 }') * const rule = root.first * * for (const decl of rule.nodes) { * decl.cloneBefore({ prop: '-webkit-' + decl.prop }) * // Cycle will be infinite, because cloneBefore moves the current node * // to the next index * } * * rule.each(decl => { * decl.cloneBefore({ prop: '-webkit-' + decl.prop }) * // Will be executed only for color and z-index * }) */ ; _proto.each = function each(callback) { if (!this.lastEach) this.lastEach = 0; if (!this.indexes) this.indexes = {}; this.lastEach += 1; var id = this.lastEach; this.indexes[id] = 0; if (!this.nodes) return undefined; var index, result; while (this.indexes[id] < this.nodes.length) { index = this.indexes[id]; result = callback(this.nodes[index], index); if (result === false) break; this.indexes[id] += 1; } delete this.indexes[id]; return result; } /** * Traverses the container’s descendant nodes, calling callback * for each node. * * Like container.each(), this method is safe to use * if you are mutating arrays during iteration. * * If you only need to iterate through the container’s immediate children, * use {@link Container#each}. * * @param {childIterator} callback Iterator receives each node and index. * * @return {false|undefined} Returns `false` if iteration was broke. * * @example * root.walk(node => { * // Traverses all descendant nodes. * }) */ ; _proto.walk = function walk(callback) { return this.each(function (child, i) { var result; try { result = callback(child, i); } catch (e) { e.postcssNode = child; if (e.stack && child.source && /\n\s{4}at /.test(e.stack)) { var s = child.source; e.stack = e.stack.replace(/\n\s{4}at /, "$&" + s.input.from + ":" + s.start.line + ":" + s.start.column + "$&"); } throw e; } if (result !== false && child.walk) { result = child.walk(callback); } return result; }); } /** * Traverses the container’s descendant nodes, calling callback * for each declaration node. * * If you pass a filter, iteration will only happen over declarations * with matching properties. * * Like {@link Container#each}, this method is safe * to use if you are mutating arrays during iteration. * * @param {string|RegExp} [prop] String or regular expression * to filter declarations by property name. * @param {childIterator} callback Iterator receives each node and index. * * @return {false|undefined} Returns `false` if iteration was broke. * * @example * root.walkDecls(decl => { * checkPropertySupport(decl.prop) * }) * * root.walkDecls('border-radius', decl => { * decl.remove() * }) * * root.walkDecls(/^background/, decl => { * decl.value = takeFirstColorFromGradient(decl.value) * }) */ ; _proto.walkDecls = function walkDecls(prop, callback) { if (!callback) { callback = prop; return this.walk(function (child, i) { if (child.type === 'decl') { return callback(child, i); } }); } if (prop instanceof RegExp) { return this.walk(function (child, i) { if (child.type === 'decl' && prop.test(child.prop)) { return callback(child, i); } }); } return this.walk(function (child, i) { if (child.type === 'decl' && child.prop === prop) { return callback(child, i); } }); } /** * Traverses the container’s descendant nodes, calling callback * for each rule node. * * If you pass a filter, iteration will only happen over rules * with matching selectors. * * Like {@link Container#each}, this method is safe * to use if you are mutating arrays during iteration. * * @param {string|RegExp} [selector] String or regular expression * to filter rules by selector. * @param {childIterator} callback Iterator receives each node and index. * * @return {false|undefined} returns `false` if iteration was broke. * * @example * const selectors = [] * root.walkRules(rule => { * selectors.push(rule.selector) * }) * console.log(`Your CSS uses ${ selectors.length } selectors`) */ ; _proto.walkRules = function walkRules(selector, callback) { if (!callback) { callback = selector; return this.walk(function (child, i) { if (child.type === 'rule') { return callback(child, i); } }); } if (selector instanceof RegExp) { return this.walk(function (child, i) { if (child.type === 'rule' && selector.test(child.selector)) { return callback(child, i); } }); } return this.walk(function (child, i) { if (child.type === 'rule' && child.selector === selector) { return callback(child, i); } }); } /** * Traverses the container’s descendant nodes, calling callback * for each at-rule node. * * If you pass a filter, iteration will only happen over at-rules * that have matching names. * * Like {@link Container#each}, this method is safe * to use if you are mutating arrays during iteration. * * @param {string|RegExp} [name] String or regular expression * to filter at-rules by name. * @param {childIterator} callback Iterator receives each node and index. * * @return {false|undefined} Returns `false` if iteration was broke. * * @example * root.walkAtRules(rule => { * if (isOld(rule.name)) rule.remove() * }) * * let first = false * root.walkAtRules('charset', rule => { * if (!first) { * first = true * } else { * rule.remove() * } * }) */ ; _proto.walkAtRules = function walkAtRules(name, callback) { if (!callback) { callback = name; return this.walk(function (child, i) { if (child.type === 'atrule') { return callback(child, i); } }); } if (name instanceof RegExp) { return this.walk(function (child, i) { if (child.type === 'atrule' && name.test(child.name)) { return callback(child, i); } }); } return this.walk(function (child, i) { if (child.type === 'atrule' && child.name === name) { return callback(child, i); } }); } /** * Traverses the container’s descendant nodes, calling callback * for each comment node. * * Like {@link Container#each}, this method is safe * to use if you are mutating arrays during iteration. * * @param {childIterator} callback Iterator receives each node and index. * * @return {false|undefined} Returns `false` if iteration was broke. * * @example * root.walkComments(comment => { * comment.remove() * }) */ ; _proto.walkComments = function walkComments(callback) { return this.walk(function (child, i) { if (child.type === 'comment') { return callback(child, i); } }); } /** * Inserts new nodes to the end of the container. * * @param {...(Node|object|string|Node[])} children New nodes. * * @return {Node} This node for methods chain. * * @example * const decl1 = postcss.decl({ prop: 'color', value: 'black' }) * const decl2 = postcss.decl({ prop: 'background-color', value: 'white' }) * rule.append(decl1, decl2) * * root.append({ name: 'charset', params: '"UTF-8"' }) // at-rule * root.append({ selector: 'a' }) // rule * rule.append({ prop: 'color', value: 'black' }) // declaration * rule.append({ text: 'Comment' }) // comment * * root.append('a {}') * root.first.append('color: black; z-index: 1') */ ; _proto.append = function append() { for (var _len = arguments.length, children = new Array(_len), _key = 0; _key < _len; _key++) { children[_key] = arguments[_key]; } for (var _i = 0, _children = children; _i < _children.length; _i++) { var child = _children[_i]; var nodes = this.normalize(child, this.last); for (var _iterator = _createForOfIteratorHelperLoose(nodes), _step; !(_step = _iterator()).done;) { var node = _step.value; this.nodes.push(node); } } return this; } /** * Inserts new nodes to the start of the container. * * @param {...(Node|object|string|Node[])} children New nodes. * * @return {Node} This node for methods chain. * * @example * const decl1 = postcss.decl({ prop: 'color', value: 'black' }) * const decl2 = postcss.decl({ prop: 'background-color', value: 'white' }) * rule.prepend(decl1, decl2) * * root.append({ name: 'charset', params: '"UTF-8"' }) // at-rule * root.append({ selector: 'a' }) // rule * rule.append({ prop: 'color', value: 'black' }) // declaration * rule.append({ text: 'Comment' }) // comment * * root.append('a {}') * root.first.append('color: black; z-index: 1') */ ; _proto.prepend = function prepend() { for (var _len2 = arguments.length, children = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) { children[_key2] = arguments[_key2]; } children = children.reverse(); for (var _iterator2 = _createForOfIteratorHelperLoose(children), _step2; !(_step2 = _iterator2()).done;) { var child = _step2.value; var nodes = this.normalize(child, this.first, 'prepend').reverse(); for (var _iterator3 = _createForOfIteratorHelperLoose(nodes), _step3; !(_step3 = _iterator3()).done;) { var node = _step3.value; this.nodes.unshift(node); } for (var id in this.indexes) { this.indexes[id] = this.indexes[id] + nodes.length; } } return this; }; _proto.cleanRaws = function cleanRaws(keepBetween) { _Node.prototype.cleanRaws.call(this, keepBetween); if (this.nodes) { for (var _iterator4 = _createForOfIteratorHelperLoose(this.nodes), _step4; !(_step4 = _iterator4()).done;) { var node = _step4.value; node.cleanRaws(keepBetween); } } } /** * Insert new node before old node within the container. * * @param {Node|number} exist Child or child’s index. * @param {Node|object|string|Node[]} add New node. * * @return {Node} This node for methods chain. * * @example * rule.insertBefore(decl, decl.clone({ prop: '-webkit-' + decl.prop })) */ ; _proto.insertBefore = function insertBefore(exist, add) { exist = this.index(exist); var type = exist === 0 ? 'prepend' : false; var nodes = this.normalize(add, this.nodes[exist], type).reverse(); for (var _iterator5 = _createForOfIteratorHelperLoose(nodes), _step5; !(_step5 = _iterator5()).done;) { var node = _step5.value; this.nodes.splice(exist, 0, node); } var index; for (var id in this.indexes) { index = this.indexes[id]; if (exist <= index) { this.indexes[id] = index + nodes.length; } } return this; } /** * Insert new node after old node within the container. * * @param {Node|number} exist Child or child’s index. * @param {Node|object|string|Node[]} add New node. * * @return {Node} This node for methods chain. */ ; _proto.insertAfter = function insertAfter(exist, add) { exist = this.index(exist); var nodes = this.normalize(add, this.nodes[exist]).reverse(); for (var _iterator6 = _createForOfIteratorHelperLoose(nodes), _step6; !(_step6 = _iterator6()).done;) { var node = _step6.value; this.nodes.splice(exist + 1, 0, node); } var index; for (var id in this.indexes) { index = this.indexes[id]; if (exist < index) { this.indexes[id] = index + nodes.length; } } return this; } /** * Removes node from the container and cleans the parent properties * from the node and its children. * * @param {Node|number} child Child or child’s index. * * @return {Node} This node for methods chain * * @example * rule.nodes.length //=> 5 * rule.removeChild(decl) * rule.nodes.length //=> 4 * decl.parent //=> undefined */ ; _proto.removeChild = function removeChild(child) { child = this.index(child); this.nodes[child].parent = undefined; this.nodes.splice(child, 1); var index; for (var id in this.indexes) { index = this.indexes[id]; if (index >= child) { this.indexes[id] = index - 1; } } return this; } /** * Removes all children from the container * and cleans their parent properties. * * @return {Node} This node for methods chain. * * @example * rule.removeAll() * rule.nodes.length //=> 0 */ ; _proto.removeAll = function removeAll() { for (var _iterator7 = _createForOfIteratorHelperLoose(this.nodes), _step7; !(_step7 = _iterator7()).done;) { var node = _step7.value; node.parent = undefined; } this.nodes = []; return this; } /** * Passes all declaration values within the container that match pattern * through callback, replacing those values with the returned result * of callback. * * This method is useful if you are using a custom unit or function * and need to iterate through all values. * * @param {string|RegExp} pattern Replace pattern. * @param {object} opts Options to speed up the search. * @param {string|string[]} opts.props An array of property names. * @param {string} opts.fast String that’s used to narrow down * values and speed up the regexp search. * @param {function|string} callback String to replace pattern or callback * that returns a new value. The callback * will receive the same arguments * as those passed to a function parameter * of `String#replace`. * * @return {Node} This node for methods chain. * * @example * root.replaceValues(/\d+rem/, { fast: 'rem' }, string => { * return 15 * parseInt(string) + 'px' * }) */ ; _proto.replaceValues = function replaceValues(pattern, opts, callback) { if (!callback) { callback = opts; opts = {}; } this.walkDecls(function (decl) { if (opts.props && opts.props.indexOf(decl.prop) === -1) return; if (opts.fast && decl.value.indexOf(opts.fast) === -1) return; decl.value = decl.value.replace(pattern, callback); }); return this; } /** * Returns `true` if callback returns `true` * for all of the container’s children. * * @param {childCondition} condition Iterator returns true or false. * * @return {boolean} Is every child pass condition. * * @example * const noPrefixes = rule.every(i => i.prop[0] !== '-') */ ; _proto.every = function every(condition) { return this.nodes.every(condition); } /** * Returns `true` if callback returns `true` for (at least) one * of the container’s children. * * @param {childCondition} condition Iterator returns true or false. * * @return {boolean} Is some child pass condition. * * @example * const hasPrefix = rule.some(i => i.prop[0] === '-') */ ; _proto.some = function some(condition) { return this.nodes.some(condition); } /** * Returns a `child`’s index within the {@link Container#nodes} array. * * @param {Node} child Child of the current container. * * @return {number} Child index. * * @example * rule.index( rule.nodes[2] ) //=> 2 */ ; _proto.index = function index(child) { if (typeof child === 'number') { return child; } return this.nodes.indexOf(child); } /** * The container’s first child. * * @type {Node} * * @example * rule.first === rules.nodes[0] */ ; _proto.normalize = function normalize(nodes, sample) { var _this = this; if (typeof nodes === 'string') { var parse = require('./parse'); nodes = cleanSource(parse(nodes).nodes); } else if (Array.isArray(nodes)) { nodes = nodes.slice(0); for (var _iterator8 = _createForOfIteratorHelperLoose(nodes), _step8; !(_step8 = _iterator8()).done;) { var i = _step8.value; if (i.parent) i.parent.removeChild(i, 'ignore'); } } else if (nodes.type === 'root') { nodes = nodes.nodes.slice(0); for (var _iterator9 = _createForOfIteratorHelperLoose(nodes), _step9; !(_step9 = _iterator9()).done;) { var _i2 = _step9.value; if (_i2.parent) _i2.parent.removeChild(_i2, 'ignore'); } } else if (nodes.type) { nodes = [nodes]; } else if (nodes.prop) { if (typeof nodes.value === 'undefined') { throw new Error('Value field is missed in node creation'); } else if (typeof nodes.value !== 'string') { nodes.value = String(nodes.value); } nodes = [new _declaration.default(nodes)]; } else if (nodes.selector) { var Rule = require('./rule'); nodes = [new Rule(nodes)]; } else if (nodes.name) { var AtRule = require('./at-rule'); nodes = [new AtRule(nodes)]; } else if (nodes.text) { nodes = [new _comment.default(nodes)]; } else { throw new Error('Unknown node type in node creation'); } var processed = nodes.map(function (i) { if (i.parent) i.parent.removeChild(i); if (typeof i.raws.before === 'undefined') { if (sample && typeof sample.raws.before !== 'undefined') { i.raws.before = sample.raws.before.replace(/[^\s]/g, ''); } } i.parent = _this; return i; }); return processed; } /** * @memberof Container# * @member {Node[]} nodes An array containing the container’s children. * * @example * const root = postcss.parse('a { color: black }') * root.nodes.length //=> 1 * root.nodes[0].selector //=> 'a' * root.nodes[0].nodes[0].prop //=> 'color' */ ; _createClass(Container, [{ key: "first", get: function get() { if (!this.nodes) return undefined; return this.nodes[0]; } /** * The container’s last child. * * @type {Node} * * @example * rule.last === rule.nodes[rule.nodes.length - 1] */ }, { key: "last", get: function get() { if (!this.nodes) return undefined; return this.nodes[this.nodes.length - 1]; } }]); return Container; }(_node.default); var _default = Container; /** * @callback childCondition * @param {Node} node Container child. * @param {number} index Child index. * @param {Node[]} nodes All container children. * @return {boolean} */ /** * @callback childIterator * @param {Node} node Container child. * @param {number} index Child index. * @return {false|undefined} Returning `false` will break iteration. */ exports.default = _default; module.exports = exports.default; //# 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Declaration from './declaration'\nimport Comment from './comment'\nimport Node from './node'\n\nfunction cleanSource (nodes) {\n  return nodes.map(i => {\n    if (i.nodes) i.nodes = cleanSource(i.nodes)\n    delete i.source\n    return i\n  })\n}\n\n/**\n * The {@link Root}, {@link AtRule}, and {@link Rule} container nodes\n * inherit some common methods to help work with their children.\n *\n * Note that all containers can store any content. If you write a rule inside\n * a rule, PostCSS will parse it.\n *\n * @extends Node\n * @abstract\n */\nclass Container extends Node {\n  push (child) {\n    child.parent = this\n    this.nodes.push(child)\n    return this\n  }\n\n  /**\n   * Iterates through the container’s immediate children,\n   * calling `callback` for each child.\n   *\n   * Returning `false` in the callback will break iteration.\n   *\n   * This method only iterates through the container’s immediate children.\n   * If you need to recursively iterate through all the container’s descendant\n   * nodes, use {@link Container#walk}.\n   *\n   * Unlike the for `{}`-cycle or `Array#forEach` this iterator is safe\n   * if you are mutating the array of child nodes during iteration.\n   * PostCSS will adjust the current index to match the mutations.\n   *\n   * @param {childIterator} callback Iterator receives each node and index.\n   *\n   * @return {false|undefined} Returns `false` if iteration was broke.\n   *\n   * @example\n   * const root = postcss.parse('a { color: black; z-index: 1 }')\n   * const rule = root.first\n   *\n   * for (const decl of rule.nodes) {\n   *   decl.cloneBefore({ prop: '-webkit-' + decl.prop })\n   *   // Cycle will be infinite, because cloneBefore moves the current node\n   *   // to the next index\n   * }\n   *\n   * rule.each(decl => {\n   *   decl.cloneBefore({ prop: '-webkit-' + decl.prop })\n   *   // Will be executed only for color and z-index\n   * })\n   */\n  each (callback) {\n    if (!this.lastEach) this.lastEach = 0\n    if (!this.indexes) this.indexes = { }\n\n    this.lastEach += 1\n    let id = this.lastEach\n    this.indexes[id] = 0\n\n    if (!this.nodes) return undefined\n\n    let index, result\n    while (this.indexes[id] < this.nodes.length) {\n      index = this.indexes[id]\n      result = callback(this.nodes[index], index)\n      if (result === false) break\n\n      this.indexes[id] += 1\n    }\n\n    delete this.indexes[id]\n\n    return result\n  }\n\n  /**\n   * Traverses the container’s descendant nodes, calling callback\n   * for each node.\n   *\n   * Like container.each(), this method is safe to use\n   * if you are mutating arrays during iteration.\n   *\n   * If you only need to iterate through the container’s immediate children,\n   * use {@link Container#each}.\n   *\n   * @param {childIterator} callback Iterator receives each node and index.\n   *\n   * @return {false|undefined} Returns `false` if iteration was broke.\n   *\n   * @example\n   * root.walk(node => {\n   *   // Traverses all descendant nodes.\n   * })\n   */\n  walk (callback) {\n    return this.each((child, i) => {\n      let result\n      try {\n        result = callback(child, i)\n      } catch (e) {\n        e.postcssNode = child\n        if (e.stack && child.source && /\\n\\s{4}at /.test(e.stack)) {\n          let s = child.source\n          e.stack = e.stack.replace(/\\n\\s{4}at /,\n            `$&${ s.input.from }:${ s.start.line }:${ s.start.column }$&`)\n        }\n        throw e\n      }\n      if (result !== false && child.walk) {\n        result = child.walk(callback)\n      }\n      return result\n    })\n  }\n\n  /**\n   * Traverses the container’s descendant nodes, calling callback\n   * for each declaration node.\n   *\n   * If you pass a filter, iteration will only happen over declarations\n   * with matching properties.\n   *\n   * Like {@link Container#each}, this method is safe\n   * to use if you are mutating arrays during iteration.\n   *\n   * @param {string|RegExp} [prop]   String or regular expression\n   *                                 to filter declarations by property name.\n   * @param {childIterator} callback Iterator receives each node and index.\n   *\n   * @return {false|undefined} Returns `false` if iteration was broke.\n   *\n   * @example\n   * root.walkDecls(decl => {\n   *   checkPropertySupport(decl.prop)\n   * })\n   *\n   * root.walkDecls('border-radius', decl => {\n   *   decl.remove()\n   * })\n   *\n   * root.walkDecls(/^background/, decl => {\n   *   decl.value = takeFirstColorFromGradient(decl.value)\n   * })\n   */\n  walkDecls (prop, callback) {\n    if (!callback) {\n      callback = prop\n      return this.walk((child, i) => {\n        if (child.type === 'decl') {\n          return callback(child, i)\n        }\n      })\n    }\n    if (prop instanceof RegExp) {\n      return this.walk((child, i) => {\n        if (child.type === 'decl' && prop.test(child.prop)) {\n          return callback(child, i)\n        }\n      })\n    }\n    return this.walk((child, i) => {\n      if (child.type === 'decl' && child.prop === prop) {\n        return callback(child, i)\n      }\n    })\n  }\n\n  /**\n   * Traverses the container’s descendant nodes, calling callback\n   * for each rule node.\n   *\n   * If you pass a filter, iteration will only happen over rules\n   * with matching selectors.\n   *\n   * Like {@link Container#each}, this method is safe\n   * to use if you are mutating arrays during iteration.\n   *\n   * @param {string|RegExp} [selector] String or regular expression\n   *                                   to filter rules by selector.\n   * @param {childIterator} callback   Iterator receives each node and index.\n   *\n   * @return {false|undefined} returns `false` if iteration was broke.\n   *\n   * @example\n   * const selectors = []\n   * root.walkRules(rule => {\n   *   selectors.push(rule.selector)\n   * })\n   * console.log(`Your CSS uses ${ selectors.length } selectors`)\n   */\n  walkRules (selector, callback) {\n    if (!callback) {\n      callback = selector\n\n      return this.walk((child, i) => {\n        if (child.type === 'rule') {\n          return callback(child, i)\n        }\n      })\n    }\n    if (selector instanceof RegExp) {\n      return this.walk((child, i) => {\n        if (child.type === 'rule' && selector.test(child.selector)) {\n          return callback(child, i)\n        }\n      })\n    }\n    return this.walk((child, i) => {\n      if (child.type === 'rule' && child.selector === selector) {\n        return callback(child, i)\n      }\n    })\n  }\n\n  /**\n   * Traverses the container’s descendant nodes, calling callback\n   * for each at-rule node.\n   *\n   * If you pass a filter, iteration will only happen over at-rules\n   * that have matching names.\n   *\n   * Like {@link Container#each}, this method is safe\n   * to use if you are mutating arrays during iteration.\n   *\n   * @param {string|RegExp} [name]   String or regular expression\n   *                                 to filter at-rules by name.\n   * @param {childIterator} callback Iterator receives each node and index.\n   *\n   * @return {false|undefined} Returns `false` if iteration was broke.\n   *\n   * @example\n   * root.walkAtRules(rule => {\n   *   if (isOld(rule.name)) rule.remove()\n   * })\n   *\n   * let first = false\n   * root.walkAtRules('charset', rule => {\n   *   if (!first) {\n   *     first = true\n   *   } else {\n   *     rule.remove()\n   *   }\n   * })\n   */\n  walkAtRules (name, callback) {\n    if (!callback) {\n      callback = name\n      return this.walk((child, i) => {\n        if (child.type === 'atrule') {\n          return callback(child, i)\n        }\n      })\n    }\n    if (name instanceof RegExp) {\n      return this.walk((child, i) => {\n        if (child.type === 'atrule' && name.test(child.name)) {\n          return callback(child, i)\n        }\n      })\n    }\n    return this.walk((child, i) => {\n      if (child.type === 'atrule' && child.name === name) {\n        return callback(child, i)\n      }\n    })\n  }\n\n  /**\n   * Traverses the container’s descendant nodes, calling callback\n   * for each comment node.\n   *\n   * Like {@link Container#each}, this method is safe\n   * to use if you are mutating arrays during iteration.\n   *\n   * @param {childIterator} callback Iterator receives each node and index.\n   *\n   * @return {false|undefined} Returns `false` if iteration was broke.\n   *\n   * @example\n   * root.walkComments(comment => {\n   *   comment.remove()\n   * })\n   */\n  walkComments (callback) {\n    return this.walk((child, i) => {\n      if (child.type === 'comment') {\n        return callback(child, i)\n      }\n    })\n  }\n\n  /**\n   * Inserts new nodes to the end of the container.\n   *\n   * @param {...(Node|object|string|Node[])} children New nodes.\n   *\n   * @return {Node} This node for methods chain.\n   *\n   * @example\n   * const decl1 = postcss.decl({ prop: 'color', value: 'black' })\n   * const decl2 = postcss.decl({ prop: 'background-color', value: 'white' })\n   * rule.append(decl1, decl2)\n   *\n   * root.append({ name: 'charset', params: '\"UTF-8\"' })  // at-rule\n   * root.append({ selector: 'a' })                       // rule\n   * rule.append({ prop: 'color', value: 'black' })       // declaration\n   * rule.append({ text: 'Comment' })                     // comment\n   *\n   * root.append('a {}')\n   * root.first.append('color: black; z-index: 1')\n   */\n  append (...children) {\n    for (let child of children) {\n      let nodes = this.normalize(child, this.last)\n      for (let node of nodes) this.nodes.push(node)\n    }\n    return this\n  }\n\n  /**\n   * Inserts new nodes to the start of the container.\n   *\n   * @param {...(Node|object|string|Node[])} children New nodes.\n   *\n   * @return {Node} This node for methods chain.\n   *\n   * @example\n   * const decl1 = postcss.decl({ prop: 'color', value: 'black' })\n   * const decl2 = postcss.decl({ prop: 'background-color', value: 'white' })\n   * rule.prepend(decl1, decl2)\n   *\n   * root.append({ name: 'charset', params: '\"UTF-8\"' })  // at-rule\n   * root.append({ selector: 'a' })                       // rule\n   * rule.append({ prop: 'color', value: 'black' })       // declaration\n   * rule.append({ text: 'Comment' })                     // comment\n   *\n   * root.append('a {}')\n   * root.first.append('color: black; z-index: 1')\n   */\n  prepend (...children) {\n    children = children.reverse()\n    for (let child of children) {\n      let nodes = this.normalize(child, this.first, 'prepend').reverse()\n      for (let node of nodes) this.nodes.unshift(node)\n      for (let id in this.indexes) {\n        this.indexes[id] = this.indexes[id] + nodes.length\n      }\n    }\n    return this\n  }\n\n  cleanRaws (keepBetween) {\n    super.cleanRaws(keepBetween)\n    if (this.nodes) {\n      for (let node of this.nodes) node.cleanRaws(keepBetween)\n    }\n  }\n\n  /**\n   * Insert new node before old node within the container.\n   *\n   * @param {Node|number} exist             Child or child’s index.\n   * @param {Node|object|string|Node[]} add New node.\n   *\n   * @return {Node} This node for methods chain.\n   *\n   * @example\n   * rule.insertBefore(decl, decl.clone({ prop: '-webkit-' + decl.prop }))\n   */\n  insertBefore (exist, add) {\n    exist = this.index(exist)\n\n    let type = exist === 0 ? 'prepend' : false\n    let nodes = this.normalize(add, this.nodes[exist], type).reverse()\n    for (let node of nodes) this.nodes.splice(exist, 0, node)\n\n    let index\n    for (let id in this.indexes) {\n      index = this.indexes[id]\n      if (exist <= index) {\n        this.indexes[id] = index + nodes.length\n      }\n    }\n\n    return this\n  }\n\n  /**\n   * Insert new node after old node within the container.\n   *\n   * @param {Node|number} exist             Child or child’s index.\n   * @param {Node|object|string|Node[]} add New node.\n   *\n   * @return {Node} This node for methods chain.\n   */\n  insertAfter (exist, add) {\n    exist = this.index(exist)\n\n    let nodes = this.normalize(add, this.nodes[exist]).reverse()\n    for (let node of nodes) this.nodes.splice(exist + 1, 0, node)\n\n    let index\n    for (let id in this.indexes) {\n      index = this.indexes[id]\n      if (exist < index) {\n        this.indexes[id] = index + nodes.length\n      }\n    }\n\n    return this\n  }\n\n  /**\n   * Removes node from the container and cleans the parent properties\n   * from the node and its children.\n   *\n   * @param {Node|number} child Child or child’s index.\n   *\n   * @return {Node} This node for methods chain\n   *\n   * @example\n   * rule.nodes.length  //=> 5\n   * rule.removeChild(decl)\n   * rule.nodes.length  //=> 4\n   * decl.parent        //=> undefined\n   */\n  removeChild (child) {\n    child = this.index(child)\n    this.nodes[child].parent = undefined\n    this.nodes.splice(child, 1)\n\n    let index\n    for (let id in this.indexes) {\n      index = this.indexes[id]\n      if (index >= child) {\n        this.indexes[id] = index - 1\n      }\n    }\n\n    return this\n  }\n\n  /**\n   * Removes all children from the container\n   * and cleans their parent properties.\n   *\n   * @return {Node} This node for methods chain.\n   *\n   * @example\n   * rule.removeAll()\n   * rule.nodes.length //=> 0\n   */\n  removeAll () {\n    for (let node of this.nodes) node.parent = undefined\n    this.nodes = []\n    return this\n  }\n\n  /**\n   * Passes all declaration values within the container that match pattern\n   * through callback, replacing those values with the returned result\n   * of callback.\n   *\n   * This method is useful if you are using a custom unit or function\n   * and need to iterate through all values.\n   *\n   * @param {string|RegExp} pattern      Replace pattern.\n   * @param {object} opts                Options to speed up the search.\n   * @param {string|string[]} opts.props An array of property names.\n   * @param {string} opts.fast           String that’s used to narrow down\n   *                                     values and speed up the regexp search.\n   * @param {function|string} callback   String to replace pattern or callback\n   *                                     that returns a new value. The callback\n   *                                     will receive the same arguments\n   *                                     as those passed to a function parameter\n   *                                     of `String#replace`.\n   *\n   * @return {Node} This node for methods chain.\n   *\n   * @example\n   * root.replaceValues(/\\d+rem/, { fast: 'rem' }, string => {\n   *   return 15 * parseInt(string) + 'px'\n   * })\n   */\n  replaceValues (pattern, opts, callback) {\n    if (!callback) {\n      callback = opts\n      opts = { }\n    }\n\n    this.walkDecls(decl => {\n      if (opts.props && opts.props.indexOf(decl.prop) === -1) return\n      if (opts.fast && decl.value.indexOf(opts.fast) === -1) return\n\n      decl.value = decl.value.replace(pattern, callback)\n    })\n\n    return this\n  }\n\n  /**\n   * Returns `true` if callback returns `true`\n   * for all of the container’s children.\n   *\n   * @param {childCondition} condition Iterator returns true or false.\n   *\n   * @return {boolean} Is every child pass condition.\n   *\n   * @example\n   * const noPrefixes = rule.every(i => i.prop[0] !== '-')\n   */\n  every (condition) {\n    return this.nodes.every(condition)\n  }\n\n  /**\n   * Returns `true` if callback returns `true` for (at least) one\n   * of the container’s children.\n   *\n   * @param {childCondition} condition Iterator returns true or false.\n   *\n   * @return {boolean} Is some child pass condition.\n   *\n   * @example\n   * const hasPrefix = rule.some(i => i.prop[0] === '-')\n   */\n  some (condition) {\n    return this.nodes.some(condition)\n  }\n\n  /**\n   * Returns a `child`’s index within the {@link Container#nodes} array.\n   *\n   * @param {Node} child Child of the current container.\n   *\n   * @return {number} Child index.\n   *\n   * @example\n   * rule.index( rule.nodes[2] ) //=> 2\n   */\n  index (child) {\n    if (typeof child === 'number') {\n      return child\n    }\n    return this.nodes.indexOf(child)\n  }\n\n  /**\n   * The container’s first child.\n   *\n   * @type {Node}\n   *\n   * @example\n   * rule.first === rules.nodes[0]\n   */\n  get first () {\n    if (!this.nodes) return undefined\n    return this.nodes[0]\n  }\n\n  /**\n   * The container’s last child.\n   *\n   * @type {Node}\n   *\n   * @example\n   * rule.last === rule.nodes[rule.nodes.length - 1]\n   */\n  get last () {\n    if (!this.nodes) return undefined\n    return this.nodes[this.nodes.length - 1]\n  }\n\n  normalize (nodes, sample) {\n    if (typeof nodes === 'string') {\n      let parse = require('./parse')\n      nodes = cleanSource(parse(nodes).nodes)\n    } else if (Array.isArray(nodes)) {\n      nodes = nodes.slice(0)\n      for (let i of nodes) {\n        if (i.parent) i.parent.removeChild(i, 'ignore')\n      }\n    } else if (nodes.type === 'root') {\n      nodes = nodes.nodes.slice(0)\n      for (let i of nodes) {\n        if (i.parent) i.parent.removeChild(i, 'ignore')\n      }\n    } else if (nodes.type) {\n      nodes = [nodes]\n    } else if (nodes.prop) {\n      if (typeof nodes.value === 'undefined') {\n        throw new Error('Value field is missed in node creation')\n      } else if (typeof nodes.value !== 'string') {\n        nodes.value = String(nodes.value)\n      }\n      nodes = [new Declaration(nodes)]\n    } else if (nodes.selector) {\n      let Rule = require('./rule')\n      nodes = [new Rule(nodes)]\n    } else if (nodes.name) {\n      let AtRule = require('./at-rule')\n      nodes = [new AtRule(nodes)]\n    } else if (nodes.text) {\n      nodes = [new Comment(nodes)]\n    } else {\n      throw new Error('Unknown node type in node creation')\n    }\n\n    let processed = nodes.map(i => {\n      if (i.parent) i.parent.removeChild(i)\n      if (typeof i.raws.before === 'undefined') {\n        if (sample && typeof sample.raws.before !== 'undefined') {\n          i.raws.before = sample.raws.before.replace(/[^\\s]/g, '')\n        }\n      }\n      i.parent = this\n      return i\n    })\n\n    return processed\n  }\n\n  /**\n   * @memberof Container#\n   * @member {Node[]} nodes An array containing the container’s children.\n   *\n   * @example\n   * const root = postcss.parse('a { color: black }')\n   * root.nodes.length           //=> 1\n   * root.nodes[0].selector      //=> 'a'\n   * root.nodes[0].nodes[0].prop //=> 'color'\n   */\n}\n\nexport default Container\n\n/**\n * @callback childCondition\n * @param {Node} node    Container child.\n * @param {number} index Child index.\n * @param {Node[]} nodes All container children.\n * @return {boolean}\n */\n\n/**\n * @callback childIterator\n * @param {Node} node    Container child.\n * @param {number} index Child index.\n * @return {false|undefined} Returning `false` will break iteration.\n */\n"],"file":"container.js"}