parser.js 55 KB

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  1. 'use strict';
  2. exports.__esModule = true;
  3. var _declaration = require('./declaration');
  4. var _declaration2 = _interopRequireDefault(_declaration);
  5. var _tokenize = require('./tokenize');
  6. var _tokenize2 = _interopRequireDefault(_tokenize);
  7. var _comment = require('./comment');
  8. var _comment2 = _interopRequireDefault(_comment);
  9. var _atRule = require('./at-rule');
  10. var _atRule2 = _interopRequireDefault(_atRule);
  11. var _root = require('./root');
  12. var _root2 = _interopRequireDefault(_root);
  13. var _rule = require('./rule');
  14. var _rule2 = _interopRequireDefault(_rule);
  15. function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  16. function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  17. var Parser = function () {
  18. function Parser(input) {
  19. _classCallCheck(this, Parser);
  20. this.input = input;
  21. this.root = new _root2.default();
  22. this.current = this.root;
  23. this.spaces = '';
  24. this.semicolon = false;
  25. this.createTokenizer();
  26. this.root.source = { input: input, start: { line: 1, column: 1 } };
  27. }
  28. Parser.prototype.createTokenizer = function createTokenizer() {
  29. this.tokenizer = (0, _tokenize2.default)(this.input);
  30. };
  31. Parser.prototype.parse = function parse() {
  32. var token = void 0;
  33. while (!this.tokenizer.endOfFile()) {
  34. token = this.tokenizer.nextToken();
  35. switch (token[0]) {
  36. case 'space':
  37. this.spaces += token[1];
  38. break;
  39. case ';':
  40. this.freeSemicolon(token);
  41. break;
  42. case '}':
  43. this.end(token);
  44. break;
  45. case 'comment':
  46. this.comment(token);
  47. break;
  48. case 'at-word':
  49. this.atrule(token);
  50. break;
  51. case '{':
  52. this.emptyRule(token);
  53. break;
  54. default:
  55. this.other(token);
  56. break;
  57. }
  58. }
  59. this.endFile();
  60. };
  61. Parser.prototype.comment = function comment(token) {
  62. var node = new _comment2.default();
  63. this.init(node, token[2], token[3]);
  64. node.source.end = { line: token[4], column: token[5] };
  65. var text = token[1].slice(2, -2);
  66. if (/^\s*$/.test(text)) {
  67. node.text = '';
  68. node.raws.left = text;
  69. node.raws.right = '';
  70. } else {
  71. var match = text.match(/^(\s*)([^]*[^\s])(\s*)$/);
  72. node.text = match[2];
  73. node.raws.left = match[1];
  74. node.raws.right = match[3];
  75. }
  76. };
  77. Parser.prototype.emptyRule = function emptyRule(token) {
  78. var node = new _rule2.default();
  79. this.init(node, token[2], token[3]);
  80. node.selector = '';
  81. node.raws.between = '';
  82. this.current = node;
  83. };
  84. Parser.prototype.other = function other(start) {
  85. var end = false;
  86. var type = null;
  87. var colon = false;
  88. var bracket = null;
  89. var brackets = [];
  90. var tokens = [];
  91. var token = start;
  92. while (token) {
  93. type = token[0];
  94. tokens.push(token);
  95. if (type === '(' || type === '[') {
  96. if (!bracket) bracket = token;
  97. brackets.push(type === '(' ? ')' : ']');
  98. } else if (brackets.length === 0) {
  99. if (type === ';') {
  100. if (colon) {
  101. this.decl(tokens);
  102. return;
  103. } else {
  104. break;
  105. }
  106. } else if (type === '{') {
  107. this.rule(tokens);
  108. return;
  109. } else if (type === '}') {
  110. this.tokenizer.back(tokens.pop());
  111. end = true;
  112. break;
  113. } else if (type === ':') {
  114. colon = true;
  115. }
  116. } else if (type === brackets[brackets.length - 1]) {
  117. brackets.pop();
  118. if (brackets.length === 0) bracket = null;
  119. }
  120. token = this.tokenizer.nextToken();
  121. }
  122. if (this.tokenizer.endOfFile()) end = true;
  123. if (brackets.length > 0) this.unclosedBracket(bracket);
  124. if (end && colon) {
  125. while (tokens.length) {
  126. token = tokens[tokens.length - 1][0];
  127. if (token !== 'space' && token !== 'comment') break;
  128. this.tokenizer.back(tokens.pop());
  129. }
  130. this.decl(tokens);
  131. return;
  132. } else {
  133. this.unknownWord(tokens);
  134. }
  135. };
  136. Parser.prototype.rule = function rule(tokens) {
  137. tokens.pop();
  138. var node = new _rule2.default();
  139. this.init(node, tokens[0][2], tokens[0][3]);
  140. node.raws.between = this.spacesAndCommentsFromEnd(tokens);
  141. this.raw(node, 'selector', tokens);
  142. this.current = node;
  143. };
  144. Parser.prototype.decl = function decl(tokens) {
  145. var node = new _declaration2.default();
  146. this.init(node);
  147. var last = tokens[tokens.length - 1];
  148. if (last[0] === ';') {
  149. this.semicolon = true;
  150. tokens.pop();
  151. }
  152. if (last[4]) {
  153. node.source.end = { line: last[4], column: last[5] };
  154. } else {
  155. node.source.end = { line: last[2], column: last[3] };
  156. }
  157. while (tokens[0][0] !== 'word') {
  158. if (tokens.length === 1) this.unknownWord(tokens);
  159. node.raws.before += tokens.shift()[1];
  160. }
  161. node.source.start = { line: tokens[0][2], column: tokens[0][3] };
  162. node.prop = '';
  163. while (tokens.length) {
  164. var type = tokens[0][0];
  165. if (type === ':' || type === 'space' || type === 'comment') {
  166. break;
  167. }
  168. node.prop += tokens.shift()[1];
  169. }
  170. node.raws.between = '';
  171. var token = void 0;
  172. while (tokens.length) {
  173. token = tokens.shift();
  174. if (token[0] === ':') {
  175. node.raws.between += token[1];
  176. break;
  177. } else {
  178. node.raws.between += token[1];
  179. }
  180. }
  181. if (node.prop[0] === '_' || node.prop[0] === '*') {
  182. node.raws.before += node.prop[0];
  183. node.prop = node.prop.slice(1);
  184. }
  185. node.raws.between += this.spacesAndCommentsFromStart(tokens);
  186. this.precheckMissedSemicolon(tokens);
  187. for (var i = tokens.length - 1; i > 0; i--) {
  188. token = tokens[i];
  189. if (token[1].toLowerCase() === '!important') {
  190. node.important = true;
  191. var string = this.stringFrom(tokens, i);
  192. string = this.spacesFromEnd(tokens) + string;
  193. if (string !== ' !important') node.raws.important = string;
  194. break;
  195. } else if (token[1].toLowerCase() === 'important') {
  196. var cache = tokens.slice(0);
  197. var str = '';
  198. for (var j = i; j > 0; j--) {
  199. var _type = cache[j][0];
  200. if (str.trim().indexOf('!') === 0 && _type !== 'space') {
  201. break;
  202. }
  203. str = cache.pop()[1] + str;
  204. }
  205. if (str.trim().indexOf('!') === 0) {
  206. node.important = true;
  207. node.raws.important = str;
  208. tokens = cache;
  209. }
  210. }
  211. if (token[0] !== 'space' && token[0] !== 'comment') {
  212. break;
  213. }
  214. }
  215. this.raw(node, 'value', tokens);
  216. if (node.value.indexOf(':') !== -1) this.checkMissedSemicolon(tokens);
  217. };
  218. Parser.prototype.atrule = function atrule(token) {
  219. var node = new _atRule2.default();
  220. node.name = token[1].slice(1);
  221. if (node.name === '') {
  222. this.unnamedAtrule(node, token);
  223. }
  224. this.init(node, token[2], token[3]);
  225. var prev = void 0;
  226. var shift = void 0;
  227. var last = false;
  228. var open = false;
  229. var params = [];
  230. while (!this.tokenizer.endOfFile()) {
  231. token = this.tokenizer.nextToken();
  232. if (token[0] === ';') {
  233. node.source.end = { line: token[2], column: token[3] };
  234. this.semicolon = true;
  235. break;
  236. } else if (token[0] === '{') {
  237. open = true;
  238. break;
  239. } else if (token[0] === '}') {
  240. if (params.length > 0) {
  241. shift = params.length - 1;
  242. prev = params[shift];
  243. while (prev && prev[0] === 'space') {
  244. prev = params[--shift];
  245. }
  246. if (prev) {
  247. node.source.end = { line: prev[4], column: prev[5] };
  248. }
  249. }
  250. this.end(token);
  251. break;
  252. } else {
  253. params.push(token);
  254. }
  255. if (this.tokenizer.endOfFile()) {
  256. last = true;
  257. break;
  258. }
  259. }
  260. node.raws.between = this.spacesAndCommentsFromEnd(params);
  261. if (params.length) {
  262. node.raws.afterName = this.spacesAndCommentsFromStart(params);
  263. this.raw(node, 'params', params);
  264. if (last) {
  265. token = params[params.length - 1];
  266. node.source.end = { line: token[4], column: token[5] };
  267. this.spaces = node.raws.between;
  268. node.raws.between = '';
  269. }
  270. } else {
  271. node.raws.afterName = '';
  272. node.params = '';
  273. }
  274. if (open) {
  275. node.nodes = [];
  276. this.current = node;
  277. }
  278. };
  279. Parser.prototype.end = function end(token) {
  280. if (this.current.nodes && this.current.nodes.length) {
  281. this.current.raws.semicolon = this.semicolon;
  282. }
  283. this.semicolon = false;
  284. this.current.raws.after = (this.current.raws.after || '') + this.spaces;
  285. this.spaces = '';
  286. if (this.current.parent) {
  287. this.current.source.end = { line: token[2], column: token[3] };
  288. this.current = this.current.parent;
  289. } else {
  290. this.unexpectedClose(token);
  291. }
  292. };
  293. Parser.prototype.endFile = function endFile() {
  294. if (this.current.parent) this.unclosedBlock();
  295. if (this.current.nodes && this.current.nodes.length) {
  296. this.current.raws.semicolon = this.semicolon;
  297. }
  298. this.current.raws.after = (this.current.raws.after || '') + this.spaces;
  299. };
  300. Parser.prototype.freeSemicolon = function freeSemicolon(token) {
  301. this.spaces += token[1];
  302. if (this.current.nodes) {
  303. var prev = this.current.nodes[this.current.nodes.length - 1];
  304. if (prev && prev.type === 'rule' && !prev.raws.ownSemicolon) {
  305. prev.raws.ownSemicolon = this.spaces;
  306. this.spaces = '';
  307. }
  308. }
  309. };
  310. // Helpers
  311. Parser.prototype.init = function init(node, line, column) {
  312. this.current.push(node);
  313. node.source = { start: { line: line, column: column }, input: this.input };
  314. node.raws.before = this.spaces;
  315. this.spaces = '';
  316. if (node.type !== 'comment') this.semicolon = false;
  317. };
  318. Parser.prototype.raw = function raw(node, prop, tokens) {
  319. var token = void 0,
  320. type = void 0;
  321. var length = tokens.length;
  322. var value = '';
  323. var clean = true;
  324. for (var i = 0; i < length; i += 1) {
  325. token = tokens[i];
  326. type = token[0];
  327. if (type === 'comment' || type === 'space' && i === length - 1) {
  328. clean = false;
  329. } else {
  330. value += token[1];
  331. }
  332. }
  333. if (!clean) {
  334. var raw = tokens.reduce(function (all, i) {
  335. return all + i[1];
  336. }, '');
  337. node.raws[prop] = { value: value, raw: raw };
  338. }
  339. node[prop] = value;
  340. };
  341. Parser.prototype.spacesAndCommentsFromEnd = function spacesAndCommentsFromEnd(tokens) {
  342. var lastTokenType = void 0;
  343. var spaces = '';
  344. while (tokens.length) {
  345. lastTokenType = tokens[tokens.length - 1][0];
  346. if (lastTokenType !== 'space' && lastTokenType !== 'comment') break;
  347. spaces = tokens.pop()[1] + spaces;
  348. }
  349. return spaces;
  350. };
  351. Parser.prototype.spacesAndCommentsFromStart = function spacesAndCommentsFromStart(tokens) {
  352. var next = void 0;
  353. var spaces = '';
  354. while (tokens.length) {
  355. next = tokens[0][0];
  356. if (next !== 'space' && next !== 'comment') break;
  357. spaces += tokens.shift()[1];
  358. }
  359. return spaces;
  360. };
  361. Parser.prototype.spacesFromEnd = function spacesFromEnd(tokens) {
  362. var lastTokenType = void 0;
  363. var spaces = '';
  364. while (tokens.length) {
  365. lastTokenType = tokens[tokens.length - 1][0];
  366. if (lastTokenType !== 'space') break;
  367. spaces = tokens.pop()[1] + spaces;
  368. }
  369. return spaces;
  370. };
  371. Parser.prototype.stringFrom = function stringFrom(tokens, from) {
  372. var result = '';
  373. for (var i = from; i < tokens.length; i++) {
  374. result += tokens[i][1];
  375. }
  376. tokens.splice(from, tokens.length - from);
  377. return result;
  378. };
  379. Parser.prototype.colon = function colon(tokens) {
  380. var brackets = 0;
  381. var token = void 0,
  382. type = void 0,
  383. prev = void 0;
  384. for (var i = 0; i < tokens.length; i++) {
  385. token = tokens[i];
  386. type = token[0];
  387. if (type === '(') {
  388. brackets += 1;
  389. } else if (type === ')') {
  390. brackets -= 1;
  391. } else if (brackets === 0 && type === ':') {
  392. if (!prev) {
  393. this.doubleColon(token);
  394. } else if (prev[0] === 'word' && prev[1] === 'progid') {
  395. continue;
  396. } else {
  397. return i;
  398. }
  399. }
  400. prev = token;
  401. }
  402. return false;
  403. };
  404. // Errors
  405. Parser.prototype.unclosedBracket = function unclosedBracket(bracket) {
  406. throw this.input.error('Unclosed bracket', bracket[2], bracket[3]);
  407. };
  408. Parser.prototype.unknownWord = function unknownWord(tokens) {
  409. throw this.input.error('Unknown word', tokens[0][2], tokens[0][3]);
  410. };
  411. Parser.prototype.unexpectedClose = function unexpectedClose(token) {
  412. throw this.input.error('Unexpected }', token[2], token[3]);
  413. };
  414. Parser.prototype.unclosedBlock = function unclosedBlock() {
  415. var pos = this.current.source.start;
  416. throw this.input.error('Unclosed block', pos.line, pos.column);
  417. };
  418. Parser.prototype.doubleColon = function doubleColon(token) {
  419. throw this.input.error('Double colon', token[2], token[3]);
  420. };
  421. Parser.prototype.unnamedAtrule = function unnamedAtrule(node, token) {
  422. throw this.input.error('At-rule without name', token[2], token[3]);
  423. };
  424. Parser.prototype.precheckMissedSemicolon = function precheckMissedSemicolon(tokens) {
  425. // Hook for Safe Parser
  426. tokens;
  427. };
  428. Parser.prototype.checkMissedSemicolon = function checkMissedSemicolon(tokens) {
  429. var colon = this.colon(tokens);
  430. if (colon === false) return;
  431. var founded = 0;
  432. var token = void 0;
  433. for (var j = colon - 1; j >= 0; j--) {
  434. token = tokens[j];
  435. if (token[0] !== 'space') {
  436. founded += 1;
  437. if (founded === 2) break;
  438. }
  439. }
  440. throw this.input.error('Missed semicolon', token[2], token[3]);
  441. };
  442. return Parser;
  443. }();
  444. exports.default = Parser;
  445. module.exports = exports['default'];
  446. //# 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Declaration from './declaration';\nimport tokenizer   from './tokenize';\nimport Comment     from './comment';\nimport AtRule      from './at-rule';\nimport Root        from './root';\nimport Rule        from './rule';\n\nexport default class Parser {\n\n    constructor(input) {\n        this.input = input;\n\n        this.root      = new Root();\n        this.current   = this.root;\n        this.spaces    = '';\n        this.semicolon = false;\n\n        this.createTokenizer();\n        this.root.source = { input, start: { line: 1, column: 1 } };\n    }\n\n    createTokenizer() {\n        this.tokenizer = tokenizer(this.input);\n    }\n\n    parse() {\n        let token;\n        while ( !this.tokenizer.endOfFile() ) {\n            token = this.tokenizer.nextToken();\n\n            switch ( token[0] ) {\n\n            case 'space':\n                this.spaces += token[1];\n                break;\n\n            case ';':\n                this.freeSemicolon(token);\n                break;\n\n            case '}':\n                this.end(token);\n                break;\n\n            case 'comment':\n                this.comment(token);\n                break;\n\n            case 'at-word':\n                this.atrule(token);\n                break;\n\n            case '{':\n                this.emptyRule(token);\n                break;\n\n            default:\n                this.other(token);\n                break;\n            }\n        }\n        this.endFile();\n    }\n\n    comment(token) {\n        let node = new Comment();\n        this.init(node, token[2], token[3]);\n        node.source.end = { line: token[4], column: token[5] };\n\n        let text = token[1].slice(2, -2);\n        if ( /^\\s*$/.test(text) ) {\n            node.text       = '';\n            node.raws.left  = text;\n            node.raws.right = '';\n        } else {\n            let match = text.match(/^(\\s*)([^]*[^\\s])(\\s*)$/);\n            node.text       = match[2];\n            node.raws.left  = match[1];\n            node.raws.right = match[3];\n        }\n    }\n\n    emptyRule(token) {\n        let node = new Rule();\n        this.init(node, token[2], token[3]);\n        node.selector = '';\n        node.raws.between = '';\n        this.current = node;\n    }\n\n    other(start) {\n        let end      = false;\n        let type     = null;\n        let colon    = false;\n        let bracket  = null;\n        let brackets = [];\n\n        let tokens = [];\n        let token = start;\n        while ( token ) {\n            type = token[0];\n            tokens.push(token);\n\n            if ( type === '(' || type === '[' ) {\n                if ( !bracket ) bracket = token;\n                brackets.push(type === '(' ? ')' : ']');\n\n            } else if ( brackets.length === 0 ) {\n                if ( type === ';' ) {\n                    if ( colon ) {\n                        this.decl(tokens);\n                        return;\n                    } else {\n                        break;\n                    }\n\n                } else if ( type === '{' ) {\n                    this.rule(tokens);\n                    return;\n\n                } else if ( type === '}' ) {\n                    this.tokenizer.back(tokens.pop());\n                    end = true;\n                    break;\n\n                } else if ( type === ':' ) {\n                    colon = true;\n                }\n\n            } else if ( type === brackets[brackets.length - 1] ) {\n                brackets.pop();\n                if ( brackets.length === 0 ) bracket = null;\n            }\n\n            token = this.tokenizer.nextToken();\n        }\n\n        if ( this.tokenizer.endOfFile() ) end = true;\n        if ( brackets.length > 0 ) this.unclosedBracket(bracket);\n\n        if ( end && colon ) {\n            while ( tokens.length ) {\n                token = tokens[tokens.length - 1][0];\n                if ( token !== 'space' && token !== 'comment' ) break;\n                this.tokenizer.back(tokens.pop());\n            }\n            this.decl(tokens);\n            return;\n        } else {\n            this.unknownWord(tokens);\n        }\n    }\n\n    rule(tokens) {\n        tokens.pop();\n\n        let node = new Rule();\n        this.init(node, tokens[0][2], tokens[0][3]);\n\n        node.raws.between = this.spacesAndCommentsFromEnd(tokens);\n        this.raw(node, 'selector', tokens);\n        this.current = node;\n    }\n\n    decl(tokens) {\n        let node = new Declaration();\n        this.init(node);\n\n        let last = tokens[tokens.length - 1];\n        if ( last[0] === ';' ) {\n            this.semicolon = true;\n            tokens.pop();\n        }\n        if ( last[4] ) {\n            node.source.end = { line: last[4], column: last[5] };\n        } else {\n            node.source.end = { line: last[2], column: last[3] };\n        }\n\n        while ( tokens[0][0] !== 'word' ) {\n            if ( tokens.length === 1 ) this.unknownWord(tokens);\n            node.raws.before += tokens.shift()[1];\n        }\n        node.source.start = { line: tokens[0][2], column: tokens[0][3] };\n\n        node.prop = '';\n        while ( tokens.length ) {\n            let type = tokens[0][0];\n            if ( type === ':' || type === 'space' || type === 'comment' ) {\n                break;\n            }\n            node.prop += tokens.shift()[1];\n        }\n\n        node.raws.between = '';\n\n        let token;\n        while ( tokens.length ) {\n            token = tokens.shift();\n\n            if ( token[0] === ':' ) {\n                node.raws.between += token[1];\n                break;\n            } else {\n                node.raws.between += token[1];\n            }\n        }\n\n        if ( node.prop[0] === '_' || node.prop[0] === '*' ) {\n            node.raws.before += node.prop[0];\n            node.prop = node.prop.slice(1);\n        }\n        node.raws.between += this.spacesAndCommentsFromStart(tokens);\n        this.precheckMissedSemicolon(tokens);\n\n        for ( let i = tokens.length - 1; i > 0; i-- ) {\n            token = tokens[i];\n            if ( token[1].toLowerCase() === '!important' ) {\n                node.important = true;\n                let string = this.stringFrom(tokens, i);\n                string = this.spacesFromEnd(tokens) + string;\n                if ( string !== ' !important' ) node.raws.important = string;\n                break;\n\n            } else if (token[1].toLowerCase() === 'important') {\n                let cache = tokens.slice(0);\n                let str   = '';\n                for ( let j = i; j > 0; j-- ) {\n                    let type = cache[j][0];\n                    if ( str.trim().indexOf('!') === 0 && type !== 'space' ) {\n                        break;\n                    }\n                    str = cache.pop()[1] + str;\n                }\n                if ( str.trim().indexOf('!') === 0 ) {\n                    node.important = true;\n                    node.raws.important = str;\n                    tokens = cache;\n                }\n            }\n\n            if ( token[0] !== 'space' && token[0] !== 'comment' ) {\n                break;\n            }\n        }\n\n        this.raw(node, 'value', tokens);\n\n        if ( node.value.indexOf(':') !== -1 ) this.checkMissedSemicolon(tokens);\n    }\n\n    atrule(token) {\n        let node  = new AtRule();\n        node.name = token[1].slice(1);\n        if ( node.name === '' ) {\n            this.unnamedAtrule(node, token);\n        }\n        this.init(node, token[2], token[3]);\n\n        let prev;\n        let shift;\n        let last   = false;\n        let open   = false;\n        let params = [];\n\n        while ( !this.tokenizer.endOfFile() ) {\n            token = this.tokenizer.nextToken();\n\n            if ( token[0] === ';' ) {\n                node.source.end = { line: token[2], column: token[3] };\n                this.semicolon = true;\n                break;\n            } else if ( token[0] === '{' ) {\n                open = true;\n                break;\n            } else if ( token[0] === '}') {\n                if ( params.length > 0 ) {\n                    shift = params.length - 1;\n                    prev = params[shift];\n                    while ( prev && prev[0] === 'space' ) {\n                        prev = params[--shift];\n                    }\n                    if ( prev ) {\n                        node.source.end = { line: prev[4], column: prev[5] };\n                    }\n                }\n                this.end(token);\n                break;\n            } else {\n                params.push(token);\n            }\n\n            if ( this.tokenizer.endOfFile() ) {\n                last = true;\n                break;\n            }\n        }\n\n        node.raws.between = this.spacesAndCommentsFromEnd(params);\n        if ( params.length ) {\n            node.raws.afterName = this.spacesAndCommentsFromStart(params);\n            this.raw(node, 'params', params);\n            if ( last ) {\n                token = params[params.length - 1];\n                node.source.end   = { line: token[4], column: token[5] };\n                this.spaces       = node.raws.between;\n                node.raws.between = '';\n            }\n        } else {\n            node.raws.afterName = '';\n            node.params         = '';\n        }\n\n        if ( open ) {\n            node.nodes   = [];\n            this.current = node;\n        }\n    }\n\n    end(token) {\n        if ( this.current.nodes && this.current.nodes.length ) {\n            this.current.raws.semicolon = this.semicolon;\n        }\n        this.semicolon = false;\n\n        this.current.raws.after = (this.current.raws.after || '') + this.spaces;\n        this.spaces = '';\n\n        if ( this.current.parent ) {\n            this.current.source.end = { line: token[2], column: token[3] };\n            this.current = this.current.parent;\n        } else {\n            this.unexpectedClose(token);\n        }\n    }\n\n    endFile() {\n        if ( this.current.parent ) this.unclosedBlock();\n        if ( this.current.nodes && this.current.nodes.length ) {\n            this.current.raws.semicolon = this.semicolon;\n        }\n        this.current.raws.after = (this.current.raws.after || '') + this.spaces;\n    }\n\n    freeSemicolon(token) {\n        this.spaces += token[1];\n        if ( this.current.nodes ) {\n            let prev = this.current.nodes[this.current.nodes.length - 1];\n            if ( prev && prev.type === 'rule' && !prev.raws.ownSemicolon ) {\n                prev.raws.ownSemicolon = this.spaces;\n                this.spaces = '';\n            }\n        }\n    }\n\n    // Helpers\n\n    init(node, line, column) {\n        this.current.push(node);\n\n        node.source = { start: { line, column }, input: this.input };\n        node.raws.before = this.spaces;\n        this.spaces = '';\n        if ( node.type !== 'comment' ) this.semicolon = false;\n    }\n\n    raw(node, prop, tokens) {\n        let token, type;\n        let length = tokens.length;\n        let value  = '';\n        let clean  = true;\n        for ( let i = 0; i < length; i += 1 ) {\n            token = tokens[i];\n            type  = token[0];\n            if ( type === 'comment' || type === 'space' && i === length - 1 ) {\n                clean = false;\n            } else {\n                value += token[1];\n            }\n        }\n        if ( !clean ) {\n            let raw = tokens.reduce( (all, i) => all + i[1], '');\n            node.raws[prop] = { value, raw };\n        }\n        node[prop] = value;\n    }\n\n    spacesAndCommentsFromEnd(tokens) {\n        let lastTokenType;\n        let spaces = '';\n        while ( tokens.length ) {\n            lastTokenType = tokens[tokens.length - 1][0];\n            if ( lastTokenType !== 'space' &&\n                lastTokenType !== 'comment' ) break;\n            spaces = tokens.pop()[1] + spaces;\n        }\n        return spaces;\n    }\n\n    spacesAndCommentsFromStart(tokens) {\n        let next;\n        let spaces = '';\n        while ( tokens.length ) {\n            next = tokens[0][0];\n            if ( next !== 'space' && next !== 'comment' ) break;\n            spaces += tokens.shift()[1];\n        }\n        return spaces;\n    }\n\n    spacesFromEnd(tokens) {\n        let lastTokenType;\n        let spaces = '';\n        while ( tokens.length ) {\n            lastTokenType = tokens[tokens.length - 1][0];\n            if ( lastTokenType !== 'space' ) break;\n            spaces = tokens.pop()[1] + spaces;\n        }\n        return spaces;\n    }\n\n    stringFrom(tokens, from) {\n        let result = '';\n        for ( let i = from; i < tokens.length; i++ ) {\n            result += tokens[i][1];\n        }\n        tokens.splice(from, tokens.length - from);\n        return result;\n    }\n\n    colon(tokens) {\n        let brackets = 0;\n        let token, type, prev;\n        for ( let i = 0; i < tokens.length; i++ ) {\n            token = tokens[i];\n            type  = token[0];\n\n            if ( type === '(' ) {\n                brackets += 1;\n            } else if ( type === ')' ) {\n                brackets -= 1;\n            } else if ( brackets === 0 && type === ':' ) {\n                if ( !prev ) {\n                    this.doubleColon(token);\n                } else if ( prev[0] === 'word' && prev[1] === 'progid' ) {\n                    continue;\n                } else {\n                    return i;\n                }\n            }\n\n            prev = token;\n        }\n        return false;\n    }\n\n    // Errors\n\n    unclosedBracket(bracket) {\n        throw this.input.error('Unclosed bracket', bracket[2], bracket[3]);\n    }\n\n    unknownWord(tokens) {\n        throw this.input.error('Unknown word', tokens[0][2], tokens[0][3]);\n    }\n\n    unexpectedClose(token) {\n        throw this.input.error('Unexpected }', token[2], token[3]);\n    }\n\n    unclosedBlock() {\n        let pos = this.current.source.start;\n        throw this.input.error('Unclosed block', pos.line, pos.column);\n    }\n\n    doubleColon(token) {\n        throw this.input.error('Double colon', token[2], token[3]);\n    }\n\n    unnamedAtrule(node, token) {\n        throw this.input.error('At-rule without name', token[2], token[3]);\n    }\n\n    precheckMissedSemicolon(tokens) {\n        // Hook for Safe Parser\n        tokens;\n    }\n\n    checkMissedSemicolon(tokens) {\n        let colon = this.colon(tokens);\n        if ( colon === false ) return;\n\n        let founded = 0;\n        let token;\n        for ( let j = colon - 1; j >= 0; j-- ) {\n            token = tokens[j];\n            if ( token[0] !== 'space' ) {\n                founded += 1;\n                if ( founded === 2 ) break;\n            }\n        }\n        throw this.input.error('Missed semicolon', token[2], token[3]);\n    }\n\n}\n"]}