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Diffstat (limited to 'node_modules/postcss/lib/container.js')
| -rw-r--r-- | node_modules/postcss/lib/container.js | 907 |
1 files changed, 907 insertions, 0 deletions
diff --git a/node_modules/postcss/lib/container.js b/node_modules/postcss/lib/container.js new file mode 100644 index 0000000..41f113f --- /dev/null +++ b/node_modules/postcss/lib/container.js @@ -0,0 +1,907 @@ +'use strict'; + +exports.__esModule = true; + +var _createClass = function () { 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); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }(); + +var _declaration = require('./declaration'); + +var _declaration2 = _interopRequireDefault(_declaration); + +var _comment = require('./comment'); + +var _comment2 = _interopRequireDefault(_comment); + +var _node = require('./node'); + +var _node2 = _interopRequireDefault(_node); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } + +function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; } + +function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : 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 = function (_Node) { + _inherits(Container, _Node); + + function Container() { + _classCallCheck(this, Container); + + return _possibleConstructorReturn(this, _Node.apply(this, arguments)); + } + + Container.prototype.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 ( let 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 + * }); + */ + + + Container.prototype.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 = void 0, + result = void 0; + 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. + * }); + */ + + + Container.prototype.walk = function walk(callback) { + return this.each(function (child, i) { + var result = callback(child, i); + 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); + * }); + */ + + + Container.prototype.walkDecls = function walkDecls(prop, callback) { + if (!callback) { + callback = prop; + return this.walk(function (child, i) { + if (child.type === 'decl') { + return callback(child, i); + } + }); + } else if (prop instanceof RegExp) { + return this.walk(function (child, i) { + if (child.type === 'decl' && prop.test(child.prop)) { + return callback(child, i); + } + }); + } else { + 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`); + */ + + + Container.prototype.walkRules = function walkRules(selector, callback) { + if (!callback) { + callback = selector; + + return this.walk(function (child, i) { + if (child.type === 'rule') { + return callback(child, i); + } + }); + } else if (selector instanceof RegExp) { + return this.walk(function (child, i) { + if (child.type === 'rule' && selector.test(child.selector)) { + return callback(child, i); + } + }); + } else { + 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(); + * } + * }); + */ + + + Container.prototype.walkAtRules = function walkAtRules(name, callback) { + if (!callback) { + callback = name; + return this.walk(function (child, i) { + if (child.type === 'atrule') { + return callback(child, i); + } + }); + } else if (name instanceof RegExp) { + return this.walk(function (child, i) { + if (child.type === 'atrule' && name.test(child.name)) { + return callback(child, i); + } + }); + } else { + 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(); + * }); + */ + + + Container.prototype.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'); + */ + + + Container.prototype.append = function append() { + for (var _len = arguments.length, children = Array(_len), _key = 0; _key < _len; _key++) { + children[_key] = arguments[_key]; + } + + for (var _iterator = children, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) { + var _ref; + + if (_isArray) { + if (_i >= _iterator.length) break; + _ref = _iterator[_i++]; + } else { + _i = _iterator.next(); + if (_i.done) break; + _ref = _i.value; + } + + var child = _ref; + + var nodes = this.normalize(child, this.last); + for (var _iterator2 = nodes, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) { + var _ref2; + + if (_isArray2) { + if (_i2 >= _iterator2.length) break; + _ref2 = _iterator2[_i2++]; + } else { + _i2 = _iterator2.next(); + if (_i2.done) break; + _ref2 = _i2.value; + } + + var node = _ref2; + 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'); + */ + + + Container.prototype.prepend = function prepend() { + for (var _len2 = arguments.length, children = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) { + children[_key2] = arguments[_key2]; + } + + children = children.reverse(); + for (var _iterator3 = children, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : _iterator3[Symbol.iterator]();;) { + var _ref3; + + if (_isArray3) { + if (_i3 >= _iterator3.length) break; + _ref3 = _iterator3[_i3++]; + } else { + _i3 = _iterator3.next(); + if (_i3.done) break; + _ref3 = _i3.value; + } + + var child = _ref3; + + var nodes = this.normalize(child, this.first, 'prepend').reverse(); + for (var _iterator4 = nodes, _isArray4 = Array.isArray(_iterator4), _i4 = 0, _iterator4 = _isArray4 ? _iterator4 : _iterator4[Symbol.iterator]();;) { + var _ref4; + + if (_isArray4) { + if (_i4 >= _iterator4.length) break; + _ref4 = _iterator4[_i4++]; + } else { + _i4 = _iterator4.next(); + if (_i4.done) break; + _ref4 = _i4.value; + } + + var node = _ref4; + this.nodes.unshift(node); + }for (var id in this.indexes) { + this.indexes[id] = this.indexes[id] + nodes.length; + } + } + return this; + }; + + Container.prototype.cleanRaws = function cleanRaws(keepBetween) { + _Node.prototype.cleanRaws.call(this, keepBetween); + if (this.nodes) { + for (var _iterator5 = this.nodes, _isArray5 = Array.isArray(_iterator5), _i5 = 0, _iterator5 = _isArray5 ? _iterator5 : _iterator5[Symbol.iterator]();;) { + var _ref5; + + if (_isArray5) { + if (_i5 >= _iterator5.length) break; + _ref5 = _iterator5[_i5++]; + } else { + _i5 = _iterator5.next(); + if (_i5.done) break; + _ref5 = _i5.value; + } + + var node = _ref5; + 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 })); + */ + + + Container.prototype.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 _iterator6 = nodes, _isArray6 = Array.isArray(_iterator6), _i6 = 0, _iterator6 = _isArray6 ? _iterator6 : _iterator6[Symbol.iterator]();;) { + var _ref6; + + if (_isArray6) { + if (_i6 >= _iterator6.length) break; + _ref6 = _iterator6[_i6++]; + } else { + _i6 = _iterator6.next(); + if (_i6.done) break; + _ref6 = _i6.value; + } + + var node = _ref6; + this.nodes.splice(exist, 0, node); + }var index = void 0; + 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 + */ + + + Container.prototype.insertAfter = function insertAfter(exist, add) { + exist = this.index(exist); + + var nodes = this.normalize(add, this.nodes[exist]).reverse(); + for (var _iterator7 = nodes, _isArray7 = Array.isArray(_iterator7), _i7 = 0, _iterator7 = _isArray7 ? _iterator7 : _iterator7[Symbol.iterator]();;) { + var _ref7; + + if (_isArray7) { + if (_i7 >= _iterator7.length) break; + _ref7 = _iterator7[_i7++]; + } else { + _i7 = _iterator7.next(); + if (_i7.done) break; + _ref7 = _i7.value; + } + + var node = _ref7; + this.nodes.splice(exist + 1, 0, node); + }var index = void 0; + 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 + */ + + + Container.prototype.removeChild = function removeChild(child) { + child = this.index(child); + this.nodes[child].parent = undefined; + this.nodes.splice(child, 1); + + var index = void 0; + 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 + */ + + + Container.prototype.removeAll = function removeAll() { + for (var _iterator8 = this.nodes, _isArray8 = Array.isArray(_iterator8), _i8 = 0, _iterator8 = _isArray8 ? _iterator8 : _iterator8[Symbol.iterator]();;) { + var _ref8; + + if (_isArray8) { + if (_i8 >= _iterator8.length) break; + _ref8 = _iterator8[_i8++]; + } else { + _i8 = _iterator8.next(); + if (_i8.done) break; + _ref8 = _i8.value; + } + + var node = _ref8; + 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'; + * }); + */ + + + Container.prototype.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] !== '-'); + */ + + + Container.prototype.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] === '-'); + */ + + + Container.prototype.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 + */ + + + Container.prototype.index = function index(child) { + if (typeof child === 'number') { + return child; + } else { + return this.nodes.indexOf(child); + } + }; + + /** + * The container’s first child. + * + * @type {Node} + * + * @example + * rule.first == rules.nodes[0]; + */ + + + Container.prototype.normalize = function normalize(nodes, sample) { + var _this2 = 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 _iterator9 = nodes, _isArray9 = Array.isArray(_iterator9), _i9 = 0, _iterator9 = _isArray9 ? _iterator9 : _iterator9[Symbol.iterator]();;) { + var _ref9; + + if (_isArray9) { + if (_i9 >= _iterator9.length) break; + _ref9 = _iterator9[_i9++]; + } else { + _i9 = _iterator9.next(); + if (_i9.done) break; + _ref9 = _i9.value; + } + + var i = _ref9; + + if (i.parent) i.parent.removeChild(i, 'ignore'); + } + } else if (nodes.type === 'root') { + nodes = nodes.nodes.slice(0); + for (var _iterator10 = nodes, _isArray10 = Array.isArray(_iterator10), _i11 = 0, _iterator10 = _isArray10 ? _iterator10 : _iterator10[Symbol.iterator]();;) { + var _ref10; + + if (_isArray10) { + if (_i11 >= _iterator10.length) break; + _ref10 = _iterator10[_i11++]; + } else { + _i11 = _iterator10.next(); + if (_i11.done) break; + _ref10 = _i11.value; + } + + var _i10 = _ref10; + + if (_i10.parent) _i10.parent.removeChild(_i10, '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 _declaration2.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 _comment2.default(nodes)]; + } else { + throw new Error('Unknown node type in node creation'); + } + + var processed = nodes.map(function (i) { + if (typeof i.before !== 'function') i = _this2.rebuild(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 = _this2; + return i; + }); + + return processed; + }; + + Container.prototype.rebuild = function rebuild(node, parent) { + var _this3 = this; + + var fix = void 0; + if (node.type === 'root') { + var Root = require('./root'); + fix = new Root(); + } else if (node.type === 'atrule') { + var AtRule = require('./at-rule'); + fix = new AtRule(); + } else if (node.type === 'rule') { + var Rule = require('./rule'); + fix = new Rule(); + } else if (node.type === 'decl') { + fix = new _declaration2.default(); + } else if (node.type === 'comment') { + fix = new _comment2.default(); + } + + for (var i in node) { + if (i === 'nodes') { + fix.nodes = node.nodes.map(function (j) { + return _this3.rebuild(j, fix); + }); + } else if (i === 'parent' && parent) { + fix.parent = parent; + } else if (node.hasOwnProperty(i)) { + fix[i] = node[i]; + } + } + + return fix; + }; + + /** + * @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; +}(_node2.default); + +exports.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 + */ + +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\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 ( let 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 = callback(child, i);\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        } else 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        } else {\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    /**\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        } else 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        } else {\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    /**\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        } else 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        } else {\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    /**\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\n     *                                       to narrow down values and speed up\n                                             the regexp search\n     * @param {function|string} callback   - string to replace pattern\n     *                                       or callback that returns a new\n     *                                       value.\n     *                                       The callback will receive\n     *                                       the same arguments as those\n     *                                       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        } else {\n            return this.nodes.indexOf(child);\n        }\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 ( typeof i.before !== 'function' ) i = this.rebuild(i);\n\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    rebuild(node, parent) {\n        let fix;\n        if ( node.type === 'root' ) {\n            let Root = require('./root');\n            fix = new Root();\n        } else if ( node.type === 'atrule' ) {\n            let AtRule = require('./at-rule');\n            fix = new AtRule();\n        } else if ( node.type === 'rule' ) {\n            let Rule = require('./rule');\n            fix = new Rule();\n        } else if ( node.type === 'decl' ) {\n            fix = new Declaration();\n        } else if ( node.type === 'comment' ) {\n            fix = new Comment();\n        }\n\n        for ( let i in node ) {\n            if ( i === 'nodes' ) {\n                fix.nodes = node.nodes.map( j => this.rebuild(j, fix) );\n            } else if ( i === 'parent' && parent ) {\n                fix.parent = parent;\n            } else if ( node.hasOwnProperty(i) ) {\n                fix[i] = node[i];\n            }\n        }\n\n        return fix;\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}\n\nexport default Container;\n\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"]} |