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1"use strict";
2
3exports.__esModule = true;
4exports.default = void 0;
5
6var _declaration = _interopRequireDefault(require("./declaration"));
7
8var _comment = _interopRequireDefault(require("./comment"));
9
10var _node = _interopRequireDefault(require("./node"));
11
12function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
13
14function _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); } }
15
16function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
17
18function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
19
20function cleanSource(nodes) {
21 return nodes.map(function (i) {
22 if (i.nodes) i.nodes = cleanSource(i.nodes);
23 delete i.source;
24 return i;
25 });
26}
27/**
28 * The {@link Root}, {@link AtRule}, and {@link Rule} container nodes
29 * inherit some common methods to help work with their children.
30 *
31 * Note that all containers can store any content. If you write a rule inside
32 * a rule, PostCSS will parse it.
33 *
34 * @extends Node
35 * @abstract
36 */
37
38
39var Container =
40/*#__PURE__*/
41function (_Node) {
42 _inheritsLoose(Container, _Node);
43
44 function Container() {
45 return _Node.apply(this, arguments) || this;
46 }
47
48 var _proto = Container.prototype;
49
50 _proto.push = function push(child) {
51 child.parent = this;
52 this.nodes.push(child);
53 return this;
54 }
55 /**
56 * Iterates through the container’s immediate children,
57 * calling `callback` for each child.
58 *
59 * Returning `false` in the callback will break iteration.
60 *
61 * This method only iterates through the container’s immediate children.
62 * If you need to recursively iterate through all the container’s descendant
63 * nodes, use {@link Container#walk}.
64 *
65 * Unlike the for `{}`-cycle or `Array#forEach` this iterator is safe
66 * if you are mutating the array of child nodes during iteration.
67 * PostCSS will adjust the current index to match the mutations.
68 *
69 * @param {childIterator} callback Iterator receives each node and index.
70 *
71 * @return {false|undefined} Returns `false` if iteration was broke.
72 *
73 * @example
74 * const root = postcss.parse('a { color: black; z-index: 1 }')
75 * const rule = root.first
76 *
77 * for (const decl of rule.nodes) {
78 * decl.cloneBefore({ prop: '-webkit-' + decl.prop })
79 * // Cycle will be infinite, because cloneBefore moves the current node
80 * // to the next index
81 * }
82 *
83 * rule.each(decl => {
84 * decl.cloneBefore({ prop: '-webkit-' + decl.prop })
85 * // Will be executed only for color and z-index
86 * })
87 */
88 ;
89
90 _proto.each = function each(callback) {
91 if (!this.lastEach) this.lastEach = 0;
92 if (!this.indexes) this.indexes = {};
93 this.lastEach += 1;
94 var id = this.lastEach;
95 this.indexes[id] = 0;
96 if (!this.nodes) return undefined;
97 var index, result;
98
99 while (this.indexes[id] < this.nodes.length) {
100 index = this.indexes[id];
101 result = callback(this.nodes[index], index);
102 if (result === false) break;
103 this.indexes[id] += 1;
104 }
105
106 delete this.indexes[id];
107 return result;
108 }
109 /**
110 * Traverses the container’s descendant nodes, calling callback
111 * for each node.
112 *
113 * Like container.each(), this method is safe to use
114 * if you are mutating arrays during iteration.
115 *
116 * If you only need to iterate through the container’s immediate children,
117 * use {@link Container#each}.
118 *
119 * @param {childIterator} callback Iterator receives each node and index.
120 *
121 * @return {false|undefined} Returns `false` if iteration was broke.
122 *
123 * @example
124 * root.walk(node => {
125 * // Traverses all descendant nodes.
126 * })
127 */
128 ;
129
130 _proto.walk = function walk(callback) {
131 return this.each(function (child, i) {
132 var result;
133
134 try {
135 result = callback(child, i);
136 } catch (e) {
137 e.postcssNode = child;
138
139 if (e.stack && child.source && /\n\s{4}at /.test(e.stack)) {
140 var s = child.source;
141 e.stack = e.stack.replace(/\n\s{4}at /, "$&" + s.input.from + ":" + s.start.line + ":" + s.start.column + "$&");
142 }
143
144 throw e;
145 }
146
147 if (result !== false && child.walk) {
148 result = child.walk(callback);
149 }
150
151 return result;
152 });
153 }
154 /**
155 * Traverses the container’s descendant nodes, calling callback
156 * for each declaration node.
157 *
158 * If you pass a filter, iteration will only happen over declarations
159 * with matching properties.
160 *
161 * Like {@link Container#each}, this method is safe
162 * to use if you are mutating arrays during iteration.
163 *
164 * @param {string|RegExp} [prop] String or regular expression
165 * to filter declarations by property name.
166 * @param {childIterator} callback Iterator receives each node and index.
167 *
168 * @return {false|undefined} Returns `false` if iteration was broke.
169 *
170 * @example
171 * root.walkDecls(decl => {
172 * checkPropertySupport(decl.prop)
173 * })
174 *
175 * root.walkDecls('border-radius', decl => {
176 * decl.remove()
177 * })
178 *
179 * root.walkDecls(/^background/, decl => {
180 * decl.value = takeFirstColorFromGradient(decl.value)
181 * })
182 */
183 ;
184
185 _proto.walkDecls = function walkDecls(prop, callback) {
186 if (!callback) {
187 callback = prop;
188 return this.walk(function (child, i) {
189 if (child.type === 'decl') {
190 return callback(child, i);
191 }
192 });
193 }
194
195 if (prop instanceof RegExp) {
196 return this.walk(function (child, i) {
197 if (child.type === 'decl' && prop.test(child.prop)) {
198 return callback(child, i);
199 }
200 });
201 }
202
203 return this.walk(function (child, i) {
204 if (child.type === 'decl' && child.prop === prop) {
205 return callback(child, i);
206 }
207 });
208 }
209 /**
210 * Traverses the container’s descendant nodes, calling callback
211 * for each rule node.
212 *
213 * If you pass a filter, iteration will only happen over rules
214 * with matching selectors.
215 *
216 * Like {@link Container#each}, this method is safe
217 * to use if you are mutating arrays during iteration.
218 *
219 * @param {string|RegExp} [selector] String or regular expression
220 * to filter rules by selector.
221 * @param {childIterator} callback Iterator receives each node and index.
222 *
223 * @return {false|undefined} returns `false` if iteration was broke.
224 *
225 * @example
226 * const selectors = []
227 * root.walkRules(rule => {
228 * selectors.push(rule.selector)
229 * })
230 * console.log(`Your CSS uses ${ selectors.length } selectors`)
231 */
232 ;
233
234 _proto.walkRules = function walkRules(selector, callback) {
235 if (!callback) {
236 callback = selector;
237 return this.walk(function (child, i) {
238 if (child.type === 'rule') {
239 return callback(child, i);
240 }
241 });
242 }
243
244 if (selector instanceof RegExp) {
245 return this.walk(function (child, i) {
246 if (child.type === 'rule' && selector.test(child.selector)) {
247 return callback(child, i);
248 }
249 });
250 }
251
252 return this.walk(function (child, i) {
253 if (child.type === 'rule' && child.selector === selector) {
254 return callback(child, i);
255 }
256 });
257 }
258 /**
259 * Traverses the container’s descendant nodes, calling callback
260 * for each at-rule node.
261 *
262 * If you pass a filter, iteration will only happen over at-rules
263 * that have matching names.
264 *
265 * Like {@link Container#each}, this method is safe
266 * to use if you are mutating arrays during iteration.
267 *
268 * @param {string|RegExp} [name] String or regular expression
269 * to filter at-rules by name.
270 * @param {childIterator} callback Iterator receives each node and index.
271 *
272 * @return {false|undefined} Returns `false` if iteration was broke.
273 *
274 * @example
275 * root.walkAtRules(rule => {
276 * if (isOld(rule.name)) rule.remove()
277 * })
278 *
279 * let first = false
280 * root.walkAtRules('charset', rule => {
281 * if (!first) {
282 * first = true
283 * } else {
284 * rule.remove()
285 * }
286 * })
287 */
288 ;
289
290 _proto.walkAtRules = function walkAtRules(name, callback) {
291 if (!callback) {
292 callback = name;
293 return this.walk(function (child, i) {
294 if (child.type === 'atrule') {
295 return callback(child, i);
296 }
297 });
298 }
299
300 if (name instanceof RegExp) {
301 return this.walk(function (child, i) {
302 if (child.type === 'atrule' && name.test(child.name)) {
303 return callback(child, i);
304 }
305 });
306 }
307
308 return this.walk(function (child, i) {
309 if (child.type === 'atrule' && child.name === name) {
310 return callback(child, i);
311 }
312 });
313 }
314 /**
315 * Traverses the container’s descendant nodes, calling callback
316 * for each comment node.
317 *
318 * Like {@link Container#each}, this method is safe
319 * to use if you are mutating arrays during iteration.
320 *
321 * @param {childIterator} callback Iterator receives each node and index.
322 *
323 * @return {false|undefined} Returns `false` if iteration was broke.
324 *
325 * @example
326 * root.walkComments(comment => {
327 * comment.remove()
328 * })
329 */
330 ;
331
332 _proto.walkComments = function walkComments(callback) {
333 return this.walk(function (child, i) {
334 if (child.type === 'comment') {
335 return callback(child, i);
336 }
337 });
338 }
339 /**
340 * Inserts new nodes to the end of the container.
341 *
342 * @param {...(Node|object|string|Node[])} children New nodes.
343 *
344 * @return {Node} This node for methods chain.
345 *
346 * @example
347 * const decl1 = postcss.decl({ prop: 'color', value: 'black' })
348 * const decl2 = postcss.decl({ prop: 'background-color', value: 'white' })
349 * rule.append(decl1, decl2)
350 *
351 * root.append({ name: 'charset', params: '"UTF-8"' }) // at-rule
352 * root.append({ selector: 'a' }) // rule
353 * rule.append({ prop: 'color', value: 'black' }) // declaration
354 * rule.append({ text: 'Comment' }) // comment
355 *
356 * root.append('a {}')
357 * root.first.append('color: black; z-index: 1')
358 */
359 ;
360
361 _proto.append = function append() {
362 for (var _len = arguments.length, children = new Array(_len), _key = 0; _key < _len; _key++) {
363 children[_key] = arguments[_key];
364 }
365
366 for (var _i = 0, _children = children; _i < _children.length; _i++) {
367 var child = _children[_i];
368 var nodes = this.normalize(child, this.last);
369
370 for (var _iterator = nodes, _isArray = Array.isArray(_iterator), _i2 = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
371 var _ref;
372
373 if (_isArray) {
374 if (_i2 >= _iterator.length) break;
375 _ref = _iterator[_i2++];
376 } else {
377 _i2 = _iterator.next();
378 if (_i2.done) break;
379 _ref = _i2.value;
380 }
381
382 var node = _ref;
383 this.nodes.push(node);
384 }
385 }
386
387 return this;
388 }
389 /**
390 * Inserts new nodes to the start of the container.
391 *
392 * @param {...(Node|object|string|Node[])} children New nodes.
393 *
394 * @return {Node} This node for methods chain.
395 *
396 * @example
397 * const decl1 = postcss.decl({ prop: 'color', value: 'black' })
398 * const decl2 = postcss.decl({ prop: 'background-color', value: 'white' })
399 * rule.prepend(decl1, decl2)
400 *
401 * root.append({ name: 'charset', params: '"UTF-8"' }) // at-rule
402 * root.append({ selector: 'a' }) // rule
403 * rule.append({ prop: 'color', value: 'black' }) // declaration
404 * rule.append({ text: 'Comment' }) // comment
405 *
406 * root.append('a {}')
407 * root.first.append('color: black; z-index: 1')
408 */
409 ;
410
411 _proto.prepend = function prepend() {
412 for (var _len2 = arguments.length, children = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
413 children[_key2] = arguments[_key2];
414 }
415
416 children = children.reverse();
417
418 for (var _iterator2 = children, _isArray2 = Array.isArray(_iterator2), _i3 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
419 var _ref2;
420
421 if (_isArray2) {
422 if (_i3 >= _iterator2.length) break;
423 _ref2 = _iterator2[_i3++];
424 } else {
425 _i3 = _iterator2.next();
426 if (_i3.done) break;
427 _ref2 = _i3.value;
428 }
429
430 var child = _ref2;
431 var nodes = this.normalize(child, this.first, 'prepend').reverse();
432
433 for (var _iterator3 = nodes, _isArray3 = Array.isArray(_iterator3), _i4 = 0, _iterator3 = _isArray3 ? _iterator3 : _iterator3[Symbol.iterator]();;) {
434 var _ref3;
435
436 if (_isArray3) {
437 if (_i4 >= _iterator3.length) break;
438 _ref3 = _iterator3[_i4++];
439 } else {
440 _i4 = _iterator3.next();
441 if (_i4.done) break;
442 _ref3 = _i4.value;
443 }
444
445 var node = _ref3;
446 this.nodes.unshift(node);
447 }
448
449 for (var id in this.indexes) {
450 this.indexes[id] = this.indexes[id] + nodes.length;
451 }
452 }
453
454 return this;
455 };
456
457 _proto.cleanRaws = function cleanRaws(keepBetween) {
458 _Node.prototype.cleanRaws.call(this, keepBetween);
459
460 if (this.nodes) {
461 for (var _iterator4 = this.nodes, _isArray4 = Array.isArray(_iterator4), _i5 = 0, _iterator4 = _isArray4 ? _iterator4 : _iterator4[Symbol.iterator]();;) {
462 var _ref4;
463
464 if (_isArray4) {
465 if (_i5 >= _iterator4.length) break;
466 _ref4 = _iterator4[_i5++];
467 } else {
468 _i5 = _iterator4.next();
469 if (_i5.done) break;
470 _ref4 = _i5.value;
471 }
472
473 var node = _ref4;
474 node.cleanRaws(keepBetween);
475 }
476 }
477 }
478 /**
479 * Insert new node before old node within the container.
480 *
481 * @param {Node|number} exist Child or child’s index.
482 * @param {Node|object|string|Node[]} add New node.
483 *
484 * @return {Node} This node for methods chain.
485 *
486 * @example
487 * rule.insertBefore(decl, decl.clone({ prop: '-webkit-' + decl.prop }))
488 */
489 ;
490
491 _proto.insertBefore = function insertBefore(exist, add) {
492 exist = this.index(exist);
493 var type = exist === 0 ? 'prepend' : false;
494 var nodes = this.normalize(add, this.nodes[exist], type).reverse();
495
496 for (var _iterator5 = nodes, _isArray5 = Array.isArray(_iterator5), _i6 = 0, _iterator5 = _isArray5 ? _iterator5 : _iterator5[Symbol.iterator]();;) {
497 var _ref5;
498
499 if (_isArray5) {
500 if (_i6 >= _iterator5.length) break;
501 _ref5 = _iterator5[_i6++];
502 } else {
503 _i6 = _iterator5.next();
504 if (_i6.done) break;
505 _ref5 = _i6.value;
506 }
507
508 var node = _ref5;
509 this.nodes.splice(exist, 0, node);
510 }
511
512 var index;
513
514 for (var id in this.indexes) {
515 index = this.indexes[id];
516
517 if (exist <= index) {
518 this.indexes[id] = index + nodes.length;
519 }
520 }
521
522 return this;
523 }
524 /**
525 * Insert new node after old node within the container.
526 *
527 * @param {Node|number} exist Child or child’s index.
528 * @param {Node|object|string|Node[]} add New node.
529 *
530 * @return {Node} This node for methods chain.
531 */
532 ;
533
534 _proto.insertAfter = function insertAfter(exist, add) {
535 exist = this.index(exist);
536 var nodes = this.normalize(add, this.nodes[exist]).reverse();
537
538 for (var _iterator6 = nodes, _isArray6 = Array.isArray(_iterator6), _i7 = 0, _iterator6 = _isArray6 ? _iterator6 : _iterator6[Symbol.iterator]();;) {
539 var _ref6;
540
541 if (_isArray6) {
542 if (_i7 >= _iterator6.length) break;
543 _ref6 = _iterator6[_i7++];
544 } else {
545 _i7 = _iterator6.next();
546 if (_i7.done) break;
547 _ref6 = _i7.value;
548 }
549
550 var node = _ref6;
551 this.nodes.splice(exist + 1, 0, node);
552 }
553
554 var index;
555
556 for (var id in this.indexes) {
557 index = this.indexes[id];
558
559 if (exist < index) {
560 this.indexes[id] = index + nodes.length;
561 }
562 }
563
564 return this;
565 }
566 /**
567 * Removes node from the container and cleans the parent properties
568 * from the node and its children.
569 *
570 * @param {Node|number} child Child or child’s index.
571 *
572 * @return {Node} This node for methods chain
573 *
574 * @example
575 * rule.nodes.length //=> 5
576 * rule.removeChild(decl)
577 * rule.nodes.length //=> 4
578 * decl.parent //=> undefined
579 */
580 ;
581
582 _proto.removeChild = function removeChild(child) {
583 child = this.index(child);
584 this.nodes[child].parent = undefined;
585 this.nodes.splice(child, 1);
586 var index;
587
588 for (var id in this.indexes) {
589 index = this.indexes[id];
590
591 if (index >= child) {
592 this.indexes[id] = index - 1;
593 }
594 }
595
596 return this;
597 }
598 /**
599 * Removes all children from the container
600 * and cleans their parent properties.
601 *
602 * @return {Node} This node for methods chain.
603 *
604 * @example
605 * rule.removeAll()
606 * rule.nodes.length //=> 0
607 */
608 ;
609
610 _proto.removeAll = function removeAll() {
611 for (var _iterator7 = this.nodes, _isArray7 = Array.isArray(_iterator7), _i8 = 0, _iterator7 = _isArray7 ? _iterator7 : _iterator7[Symbol.iterator]();;) {
612 var _ref7;
613
614 if (_isArray7) {
615 if (_i8 >= _iterator7.length) break;
616 _ref7 = _iterator7[_i8++];
617 } else {
618 _i8 = _iterator7.next();
619 if (_i8.done) break;
620 _ref7 = _i8.value;
621 }
622
623 var node = _ref7;
624 node.parent = undefined;
625 }
626
627 this.nodes = [];
628 return this;
629 }
630 /**
631 * Passes all declaration values within the container that match pattern
632 * through callback, replacing those values with the returned result
633 * of callback.
634 *
635 * This method is useful if you are using a custom unit or function
636 * and need to iterate through all values.
637 *
638 * @param {string|RegExp} pattern Replace pattern.
639 * @param {object} opts Options to speed up the search.
640 * @param {string|string[]} opts.props An array of property names.
641 * @param {string} opts.fast String that’s used to narrow down
642 * values and speed up the regexp search.
643 * @param {function|string} callback String to replace pattern or callback
644 * that returns a new value. The callback
645 * will receive the same arguments
646 * as those passed to a function parameter
647 * of `String#replace`.
648 *
649 * @return {Node} This node for methods chain.
650 *
651 * @example
652 * root.replaceValues(/\d+rem/, { fast: 'rem' }, string => {
653 * return 15 * parseInt(string) + 'px'
654 * })
655 */
656 ;
657
658 _proto.replaceValues = function replaceValues(pattern, opts, callback) {
659 if (!callback) {
660 callback = opts;
661 opts = {};
662 }
663
664 this.walkDecls(function (decl) {
665 if (opts.props && opts.props.indexOf(decl.prop) === -1) return;
666 if (opts.fast && decl.value.indexOf(opts.fast) === -1) return;
667 decl.value = decl.value.replace(pattern, callback);
668 });
669 return this;
670 }
671 /**
672 * Returns `true` if callback returns `true`
673 * for all of the container’s children.
674 *
675 * @param {childCondition} condition Iterator returns true or false.
676 *
677 * @return {boolean} Is every child pass condition.
678 *
679 * @example
680 * const noPrefixes = rule.every(i => i.prop[0] !== '-')
681 */
682 ;
683
684 _proto.every = function every(condition) {
685 return this.nodes.every(condition);
686 }
687 /**
688 * Returns `true` if callback returns `true` for (at least) one
689 * of the container’s children.
690 *
691 * @param {childCondition} condition Iterator returns true or false.
692 *
693 * @return {boolean} Is some child pass condition.
694 *
695 * @example
696 * const hasPrefix = rule.some(i => i.prop[0] === '-')
697 */
698 ;
699
700 _proto.some = function some(condition) {
701 return this.nodes.some(condition);
702 }
703 /**
704 * Returns a `child`’s index within the {@link Container#nodes} array.
705 *
706 * @param {Node} child Child of the current container.
707 *
708 * @return {number} Child index.
709 *
710 * @example
711 * rule.index( rule.nodes[2] ) //=> 2
712 */
713 ;
714
715 _proto.index = function index(child) {
716 if (typeof child === 'number') {
717 return child;
718 }
719
720 return this.nodes.indexOf(child);
721 }
722 /**
723 * The container’s first child.
724 *
725 * @type {Node}
726 *
727 * @example
728 * rule.first === rules.nodes[0]
729 */
730 ;
731
732 _proto.normalize = function normalize(nodes, sample) {
733 var _this = this;
734
735 if (typeof nodes === 'string') {
736 var parse = require('./parse');
737
738 nodes = cleanSource(parse(nodes).nodes);
739 } else if (Array.isArray(nodes)) {
740 nodes = nodes.slice(0);
741
742 for (var _iterator8 = nodes, _isArray8 = Array.isArray(_iterator8), _i9 = 0, _iterator8 = _isArray8 ? _iterator8 : _iterator8[Symbol.iterator]();;) {
743 var _ref8;
744
745 if (_isArray8) {
746 if (_i9 >= _iterator8.length) break;
747 _ref8 = _iterator8[_i9++];
748 } else {
749 _i9 = _iterator8.next();
750 if (_i9.done) break;
751 _ref8 = _i9.value;
752 }
753
754 var i = _ref8;
755 if (i.parent) i.parent.removeChild(i, 'ignore');
756 }
757 } else if (nodes.type === 'root') {
758 nodes = nodes.nodes.slice(0);
759
760 for (var _iterator9 = nodes, _isArray9 = Array.isArray(_iterator9), _i10 = 0, _iterator9 = _isArray9 ? _iterator9 : _iterator9[Symbol.iterator]();;) {
761 var _ref9;
762
763 if (_isArray9) {
764 if (_i10 >= _iterator9.length) break;
765 _ref9 = _iterator9[_i10++];
766 } else {
767 _i10 = _iterator9.next();
768 if (_i10.done) break;
769 _ref9 = _i10.value;
770 }
771
772 var _i11 = _ref9;
773 if (_i11.parent) _i11.parent.removeChild(_i11, 'ignore');
774 }
775 } else if (nodes.type) {
776 nodes = [nodes];
777 } else if (nodes.prop) {
778 if (typeof nodes.value === 'undefined') {
779 throw new Error('Value field is missed in node creation');
780 } else if (typeof nodes.value !== 'string') {
781 nodes.value = String(nodes.value);
782 }
783
784 nodes = [new _declaration.default(nodes)];
785 } else if (nodes.selector) {
786 var Rule = require('./rule');
787
788 nodes = [new Rule(nodes)];
789 } else if (nodes.name) {
790 var AtRule = require('./at-rule');
791
792 nodes = [new AtRule(nodes)];
793 } else if (nodes.text) {
794 nodes = [new _comment.default(nodes)];
795 } else {
796 throw new Error('Unknown node type in node creation');
797 }
798
799 var processed = nodes.map(function (i) {
800 if (i.parent) i.parent.removeChild(i);
801
802 if (typeof i.raws.before === 'undefined') {
803 if (sample && typeof sample.raws.before !== 'undefined') {
804 i.raws.before = sample.raws.before.replace(/[^\s]/g, '');
805 }
806 }
807
808 i.parent = _this;
809 return i;
810 });
811 return processed;
812 }
813 /**
814 * @memberof Container#
815 * @member {Node[]} nodes An array containing the container’s children.
816 *
817 * @example
818 * const root = postcss.parse('a { color: black }')
819 * root.nodes.length //=> 1
820 * root.nodes[0].selector //=> 'a'
821 * root.nodes[0].nodes[0].prop //=> 'color'
822 */
823 ;
824
825 _createClass(Container, [{
826 key: "first",
827 get: function get() {
828 if (!this.nodes) return undefined;
829 return this.nodes[0];
830 }
831 /**
832 * The container’s last child.
833 *
834 * @type {Node}
835 *
836 * @example
837 * rule.last === rule.nodes[rule.nodes.length - 1]
838 */
839
840 }, {
841 key: "last",
842 get: function get() {
843 if (!this.nodes) return undefined;
844 return this.nodes[this.nodes.length - 1];
845 }
846 }]);
847
848 return Container;
849}(_node.default);
850
851var _default = Container;
852/**
853 * @callback childCondition
854 * @param {Node} node Container child.
855 * @param {number} index Child index.
856 * @param {Node[]} nodes All container children.
857 * @return {boolean}
858 */
859
860/**
861 * @callback childIterator
862 * @param {Node} node Container child.
863 * @param {number} index Child index.
864 * @return {false|undefined} Returning `false` will break iteration.
865 */
866
867exports.default = _default;
868module.exports = exports.default;
869//# 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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"}