source: trip-planner-front/node_modules/css-tree/lib/lexer/prepare-tokens.js@ 6fe77af

Last change on this file since 6fe77af was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.1 KB
Line 
1var tokenize = require('../tokenizer');
2var TokenStream = require('../common/TokenStream');
3var tokenStream = new TokenStream();
4var astToTokens = {
5 decorator: function(handlers) {
6 var curNode = null;
7 var prev = { len: 0, node: null };
8 var nodes = [prev];
9 var buffer = '';
10
11 return {
12 children: handlers.children,
13 node: function(node) {
14 var tmp = curNode;
15 curNode = node;
16 handlers.node.call(this, node);
17 curNode = tmp;
18 },
19 chunk: function(chunk) {
20 buffer += chunk;
21 if (prev.node !== curNode) {
22 nodes.push({
23 len: chunk.length,
24 node: curNode
25 });
26 } else {
27 prev.len += chunk.length;
28 }
29 },
30 result: function() {
31 return prepareTokens(buffer, nodes);
32 }
33 };
34 }
35};
36
37function prepareTokens(str, nodes) {
38 var tokens = [];
39 var nodesOffset = 0;
40 var nodesIndex = 0;
41 var currentNode = nodes ? nodes[nodesIndex].node : null;
42
43 tokenize(str, tokenStream);
44
45 while (!tokenStream.eof) {
46 if (nodes) {
47 while (nodesIndex < nodes.length && nodesOffset + nodes[nodesIndex].len <= tokenStream.tokenStart) {
48 nodesOffset += nodes[nodesIndex++].len;
49 currentNode = nodes[nodesIndex].node;
50 }
51 }
52
53 tokens.push({
54 type: tokenStream.tokenType,
55 value: tokenStream.getTokenValue(),
56 index: tokenStream.tokenIndex, // TODO: remove it, temporary solution
57 balance: tokenStream.balance[tokenStream.tokenIndex], // TODO: remove it, temporary solution
58 node: currentNode
59 });
60 tokenStream.next();
61 // console.log({ ...tokens[tokens.length - 1], node: undefined });
62 }
63
64 return tokens;
65}
66
67module.exports = function(value, syntax) {
68 if (typeof value === 'string') {
69 return prepareTokens(value, null);
70 }
71
72 return syntax.generate(value, astToTokens);
73};
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