.gitignore added
[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / postcss / lib / parser.js
1 'use strict';
2
3 exports.__esModule = true;
4
5 var _declaration = require('./declaration');
6
7 var _declaration2 = _interopRequireDefault(_declaration);
8
9 var _tokenize = require('./tokenize');
10
11 var _tokenize2 = _interopRequireDefault(_tokenize);
12
13 var _comment = require('./comment');
14
15 var _comment2 = _interopRequireDefault(_comment);
16
17 var _atRule = require('./at-rule');
18
19 var _atRule2 = _interopRequireDefault(_atRule);
20
21 var _root = require('./root');
22
23 var _root2 = _interopRequireDefault(_root);
24
25 var _rule = require('./rule');
26
27 var _rule2 = _interopRequireDefault(_rule);
28
29 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
30
31 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
32
33 var Parser = function () {
34     function Parser(input) {
35         _classCallCheck(this, Parser);
36
37         this.input = input;
38
39         this.root = new _root2.default();
40         this.current = this.root;
41         this.spaces = '';
42         this.semicolon = false;
43
44         this.createTokenizer();
45         this.root.source = { input: input, start: { line: 1, column: 1 } };
46     }
47
48     Parser.prototype.createTokenizer = function createTokenizer() {
49         this.tokenizer = (0, _tokenize2.default)(this.input);
50     };
51
52     Parser.prototype.parse = function parse() {
53         var token = void 0;
54         while (!this.tokenizer.endOfFile()) {
55             token = this.tokenizer.nextToken();
56
57             switch (token[0]) {
58
59                 case 'space':
60                     this.spaces += token[1];
61                     break;
62
63                 case ';':
64                     this.freeSemicolon(token);
65                     break;
66
67                 case '}':
68                     this.end(token);
69                     break;
70
71                 case 'comment':
72                     this.comment(token);
73                     break;
74
75                 case 'at-word':
76                     this.atrule(token);
77                     break;
78
79                 case '{':
80                     this.emptyRule(token);
81                     break;
82
83                 default:
84                     this.other(token);
85                     break;
86             }
87         }
88         this.endFile();
89     };
90
91     Parser.prototype.comment = function comment(token) {
92         var node = new _comment2.default();
93         this.init(node, token[2], token[3]);
94         node.source.end = { line: token[4], column: token[5] };
95
96         var text = token[1].slice(2, -2);
97         if (/^\s*$/.test(text)) {
98             node.text = '';
99             node.raws.left = text;
100             node.raws.right = '';
101         } else {
102             var match = text.match(/^(\s*)([^]*[^\s])(\s*)$/);
103             node.text = match[2];
104             node.raws.left = match[1];
105             node.raws.right = match[3];
106         }
107     };
108
109     Parser.prototype.emptyRule = function emptyRule(token) {
110         var node = new _rule2.default();
111         this.init(node, token[2], token[3]);
112         node.selector = '';
113         node.raws.between = '';
114         this.current = node;
115     };
116
117     Parser.prototype.other = function other(start) {
118         var end = false;
119         var type = null;
120         var colon = false;
121         var bracket = null;
122         var brackets = [];
123
124         var tokens = [];
125         var token = start;
126         while (token) {
127             type = token[0];
128             tokens.push(token);
129
130             if (type === '(' || type === '[') {
131                 if (!bracket) bracket = token;
132                 brackets.push(type === '(' ? ')' : ']');
133             } else if (brackets.length === 0) {
134                 if (type === ';') {
135                     if (colon) {
136                         this.decl(tokens);
137                         return;
138                     } else {
139                         break;
140                     }
141                 } else if (type === '{') {
142                     this.rule(tokens);
143                     return;
144                 } else if (type === '}') {
145                     this.tokenizer.back(tokens.pop());
146                     end = true;
147                     break;
148                 } else if (type === ':') {
149                     colon = true;
150                 }
151             } else if (type === brackets[brackets.length - 1]) {
152                 brackets.pop();
153                 if (brackets.length === 0) bracket = null;
154             }
155
156             token = this.tokenizer.nextToken();
157         }
158
159         if (this.tokenizer.endOfFile()) end = true;
160         if (brackets.length > 0) this.unclosedBracket(bracket);
161
162         if (end && colon) {
163             while (tokens.length) {
164                 token = tokens[tokens.length - 1][0];
165                 if (token !== 'space' && token !== 'comment') break;
166                 this.tokenizer.back(tokens.pop());
167             }
168             this.decl(tokens);
169             return;
170         } else {
171             this.unknownWord(tokens);
172         }
173     };
174
175     Parser.prototype.rule = function rule(tokens) {
176         tokens.pop();
177
178         var node = new _rule2.default();
179         this.init(node, tokens[0][2], tokens[0][3]);
180
181         node.raws.between = this.spacesAndCommentsFromEnd(tokens);
182         this.raw(node, 'selector', tokens);
183         this.current = node;
184     };
185
186     Parser.prototype.decl = function decl(tokens) {
187         var node = new _declaration2.default();
188         this.init(node);
189
190         var last = tokens[tokens.length - 1];
191         if (last[0] === ';') {
192             this.semicolon = true;
193             tokens.pop();
194         }
195         if (last[4]) {
196             node.source.end = { line: last[4], column: last[5] };
197         } else {
198             node.source.end = { line: last[2], column: last[3] };
199         }
200
201         while (tokens[0][0] !== 'word') {
202             if (tokens.length === 1) this.unknownWord(tokens);
203             node.raws.before += tokens.shift()[1];
204         }
205         node.source.start = { line: tokens[0][2], column: tokens[0][3] };
206
207         node.prop = '';
208         while (tokens.length) {
209             var type = tokens[0][0];
210             if (type === ':' || type === 'space' || type === 'comment') {
211                 break;
212             }
213             node.prop += tokens.shift()[1];
214         }
215
216         node.raws.between = '';
217
218         var token = void 0;
219         while (tokens.length) {
220             token = tokens.shift();
221
222             if (token[0] === ':') {
223                 node.raws.between += token[1];
224                 break;
225             } else {
226                 node.raws.between += token[1];
227             }
228         }
229
230         if (node.prop[0] === '_' || node.prop[0] === '*') {
231             node.raws.before += node.prop[0];
232             node.prop = node.prop.slice(1);
233         }
234         node.raws.between += this.spacesAndCommentsFromStart(tokens);
235         this.precheckMissedSemicolon(tokens);
236
237         for (var i = tokens.length - 1; i > 0; i--) {
238             token = tokens[i];
239             if (token[1].toLowerCase() === '!important') {
240                 node.important = true;
241                 var string = this.stringFrom(tokens, i);
242                 string = this.spacesFromEnd(tokens) + string;
243                 if (string !== ' !important') node.raws.important = string;
244                 break;
245             } else if (token[1].toLowerCase() === 'important') {
246                 var cache = tokens.slice(0);
247                 var str = '';
248                 for (var j = i; j > 0; j--) {
249                     var _type = cache[j][0];
250                     if (str.trim().indexOf('!') === 0 && _type !== 'space') {
251                         break;
252                     }
253                     str = cache.pop()[1] + str;
254                 }
255                 if (str.trim().indexOf('!') === 0) {
256                     node.important = true;
257                     node.raws.important = str;
258                     tokens = cache;
259                 }
260             }
261
262             if (token[0] !== 'space' && token[0] !== 'comment') {
263                 break;
264             }
265         }
266
267         this.raw(node, 'value', tokens);
268
269         if (node.value.indexOf(':') !== -1) this.checkMissedSemicolon(tokens);
270     };
271
272     Parser.prototype.atrule = function atrule(token) {
273         var node = new _atRule2.default();
274         node.name = token[1].slice(1);
275         if (node.name === '') {
276             this.unnamedAtrule(node, token);
277         }
278         this.init(node, token[2], token[3]);
279
280         var prev = void 0;
281         var shift = void 0;
282         var last = false;
283         var open = false;
284         var params = [];
285
286         while (!this.tokenizer.endOfFile()) {
287             token = this.tokenizer.nextToken();
288
289             if (token[0] === ';') {
290                 node.source.end = { line: token[2], column: token[3] };
291                 this.semicolon = true;
292                 break;
293             } else if (token[0] === '{') {
294                 open = true;
295                 break;
296             } else if (token[0] === '}') {
297                 if (params.length > 0) {
298                     shift = params.length - 1;
299                     prev = params[shift];
300                     while (prev && prev[0] === 'space') {
301                         prev = params[--shift];
302                     }
303                     if (prev) {
304                         node.source.end = { line: prev[4], column: prev[5] };
305                     }
306                 }
307                 this.end(token);
308                 break;
309             } else {
310                 params.push(token);
311             }
312
313             if (this.tokenizer.endOfFile()) {
314                 last = true;
315                 break;
316             }
317         }
318
319         node.raws.between = this.spacesAndCommentsFromEnd(params);
320         if (params.length) {
321             node.raws.afterName = this.spacesAndCommentsFromStart(params);
322             this.raw(node, 'params', params);
323             if (last) {
324                 token = params[params.length - 1];
325                 node.source.end = { line: token[4], column: token[5] };
326                 this.spaces = node.raws.between;
327                 node.raws.between = '';
328             }
329         } else {
330             node.raws.afterName = '';
331             node.params = '';
332         }
333
334         if (open) {
335             node.nodes = [];
336             this.current = node;
337         }
338     };
339
340     Parser.prototype.end = function end(token) {
341         if (this.current.nodes && this.current.nodes.length) {
342             this.current.raws.semicolon = this.semicolon;
343         }
344         this.semicolon = false;
345
346         this.current.raws.after = (this.current.raws.after || '') + this.spaces;
347         this.spaces = '';
348
349         if (this.current.parent) {
350             this.current.source.end = { line: token[2], column: token[3] };
351             this.current = this.current.parent;
352         } else {
353             this.unexpectedClose(token);
354         }
355     };
356
357     Parser.prototype.endFile = function endFile() {
358         if (this.current.parent) this.unclosedBlock();
359         if (this.current.nodes && this.current.nodes.length) {
360             this.current.raws.semicolon = this.semicolon;
361         }
362         this.current.raws.after = (this.current.raws.after || '') + this.spaces;
363     };
364
365     Parser.prototype.freeSemicolon = function freeSemicolon(token) {
366         this.spaces += token[1];
367         if (this.current.nodes) {
368             var prev = this.current.nodes[this.current.nodes.length - 1];
369             if (prev && prev.type === 'rule' && !prev.raws.ownSemicolon) {
370                 prev.raws.ownSemicolon = this.spaces;
371                 this.spaces = '';
372             }
373         }
374     };
375
376     // Helpers
377
378     Parser.prototype.init = function init(node, line, column) {
379         this.current.push(node);
380
381         node.source = { start: { line: line, column: column }, input: this.input };
382         node.raws.before = this.spaces;
383         this.spaces = '';
384         if (node.type !== 'comment') this.semicolon = false;
385     };
386
387     Parser.prototype.raw = function raw(node, prop, tokens) {
388         var token = void 0,
389             type = void 0;
390         var length = tokens.length;
391         var value = '';
392         var clean = true;
393         var next = void 0,
394             prev = void 0;
395         var pattern = /^([.|#])?([\w])+/i;
396
397         for (var i = 0; i < length; i += 1) {
398             token = tokens[i];
399             type = token[0];
400
401             if (type === 'comment' && node.type === 'rule') {
402                 prev = tokens[i - 1];
403                 next = tokens[i + 1];
404
405                 if (prev[0] !== 'space' && next[0] !== 'space' && pattern.test(prev[1]) && pattern.test(next[1])) {
406                     value += token[1];
407                 } else {
408                     clean = false;
409                 }
410
411                 continue;
412             }
413
414             if (type === 'comment' || type === 'space' && i === length - 1) {
415                 clean = false;
416             } else {
417                 value += token[1];
418             }
419         }
420         if (!clean) {
421             var raw = tokens.reduce(function (all, i) {
422                 return all + i[1];
423             }, '');
424             node.raws[prop] = { value: value, raw: raw };
425         }
426         node[prop] = value;
427     };
428
429     Parser.prototype.spacesAndCommentsFromEnd = function spacesAndCommentsFromEnd(tokens) {
430         var lastTokenType = void 0;
431         var spaces = '';
432         while (tokens.length) {
433             lastTokenType = tokens[tokens.length - 1][0];
434             if (lastTokenType !== 'space' && lastTokenType !== 'comment') break;
435             spaces = tokens.pop()[1] + spaces;
436         }
437         return spaces;
438     };
439
440     Parser.prototype.spacesAndCommentsFromStart = function spacesAndCommentsFromStart(tokens) {
441         var next = void 0;
442         var spaces = '';
443         while (tokens.length) {
444             next = tokens[0][0];
445             if (next !== 'space' && next !== 'comment') break;
446             spaces += tokens.shift()[1];
447         }
448         return spaces;
449     };
450
451     Parser.prototype.spacesFromEnd = function spacesFromEnd(tokens) {
452         var lastTokenType = void 0;
453         var spaces = '';
454         while (tokens.length) {
455             lastTokenType = tokens[tokens.length - 1][0];
456             if (lastTokenType !== 'space') break;
457             spaces = tokens.pop()[1] + spaces;
458         }
459         return spaces;
460     };
461
462     Parser.prototype.stringFrom = function stringFrom(tokens, from) {
463         var result = '';
464         for (var i = from; i < tokens.length; i++) {
465             result += tokens[i][1];
466         }
467         tokens.splice(from, tokens.length - from);
468         return result;
469     };
470
471     Parser.prototype.colon = function colon(tokens) {
472         var brackets = 0;
473         var token = void 0,
474             type = void 0,
475             prev = void 0;
476         for (var i = 0; i < tokens.length; i++) {
477             token = tokens[i];
478             type = token[0];
479
480             if (type === '(') {
481                 brackets += 1;
482             } else if (type === ')') {
483                 brackets -= 1;
484             } else if (brackets === 0 && type === ':') {
485                 if (!prev) {
486                     this.doubleColon(token);
487                 } else if (prev[0] === 'word' && prev[1] === 'progid') {
488                     continue;
489                 } else {
490                     return i;
491                 }
492             }
493
494             prev = token;
495         }
496         return false;
497     };
498
499     // Errors
500
501     Parser.prototype.unclosedBracket = function unclosedBracket(bracket) {
502         throw this.input.error('Unclosed bracket', bracket[2], bracket[3]);
503     };
504
505     Parser.prototype.unknownWord = function unknownWord(tokens) {
506         throw this.input.error('Unknown word', tokens[0][2], tokens[0][3]);
507     };
508
509     Parser.prototype.unexpectedClose = function unexpectedClose(token) {
510         throw this.input.error('Unexpected }', token[2], token[3]);
511     };
512
513     Parser.prototype.unclosedBlock = function unclosedBlock() {
514         var pos = this.current.source.start;
515         throw this.input.error('Unclosed block', pos.line, pos.column);
516     };
517
518     Parser.prototype.doubleColon = function doubleColon(token) {
519         throw this.input.error('Double colon', token[2], token[3]);
520     };
521
522     Parser.prototype.unnamedAtrule = function unnamedAtrule(node, token) {
523         throw this.input.error('At-rule without name', token[2], token[3]);
524     };
525
526     Parser.prototype.precheckMissedSemicolon = function precheckMissedSemicolon(tokens) {
527         // Hook for Safe Parser
528         tokens;
529     };
530
531     Parser.prototype.checkMissedSemicolon = function checkMissedSemicolon(tokens) {
532         var colon = this.colon(tokens);
533         if (colon === false) return;
534
535         var founded = 0;
536         var token = void 0;
537         for (var j = colon - 1; j >= 0; j--) {
538             token = tokens[j];
539             if (token[0] !== 'space') {
540                 founded += 1;
541                 if (founded === 2) break;
542             }
543         }
544         throw this.input.error('Missed semicolon', token[2], token[3]);
545     };
546
547     return Parser;
548 }();
549
550 exports.default = Parser;
551 module.exports = exports['default'];
552 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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        let next, prev;\n        const pattern = /^([.|#])?([\\w])+/i;\n\n        for ( let i = 0; i < length; i += 1 ) {\n            token = tokens[i];\n            type  = token[0];\n\n            if ( type === 'comment' && node.type === 'rule' ) {\n                prev = tokens[i - 1];\n                next = tokens[i + 1];\n\n                if (\n                    prev[0] !== 'space' &&\n                    next[0] !== 'space' &&\n                    pattern.test(prev[1]) &&\n                    pattern.test(next[1])\n                ) {\n                    value += token[1];\n                } else {\n                    clean = false;\n                }\n\n                continue;\n            }\n\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"]}