source: trip-planner-front/node_modules/parse5-html-rewriting-stream/lib/index.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.3 KB
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1'use strict';
2
3const SAXParser = require('parse5-sax-parser');
4const { escapeString } = require('parse5/lib/serializer');
5
6class RewritingStream extends SAXParser {
7 constructor() {
8 super({ sourceCodeLocationInfo: true });
9
10 this.posTracker = this.locInfoMixin.posTracker;
11 }
12
13 _transformChunk(chunk) {
14 // NOTE: ignore upstream return value as we want to push to
15 // the Writable part of Transform stream ourselves.
16 super._transformChunk(chunk);
17 }
18
19 _getRawHtml(location) {
20 const droppedBufferSize = this.posTracker.droppedBufferSize;
21 const start = location.startOffset - droppedBufferSize;
22 const end = location.endOffset - droppedBufferSize;
23
24 return this.tokenizer.preprocessor.html.slice(start, end);
25 }
26
27 // Events
28 _handleToken(token) {
29 if (!super._handleToken(token)) {
30 this.emitRaw(this._getRawHtml(token.location));
31 }
32
33 // NOTE: don't skip new lines after <pre> and other tags,
34 // otherwise we'll have incorrect raw data.
35 this.parserFeedbackSimulator.skipNextNewLine = false;
36 }
37
38 // Emitter API
39 _emitToken(eventName, token) {
40 this.emit(eventName, token, this._getRawHtml(token.sourceCodeLocation));
41 }
42
43 emitDoctype(token) {
44 let res = `<!DOCTYPE ${token.name}`;
45
46 if (token.publicId !== null) {
47 res += ` PUBLIC "${token.publicId}"`;
48 } else if (token.systemId !== null) {
49 res += ' SYSTEM';
50 }
51
52 if (token.systemId !== null) {
53 res += ` "${token.systemId}"`;
54 }
55
56 res += '>';
57
58 this.push(res);
59 }
60
61 emitStartTag(token) {
62 let res = `<${token.tagName}`;
63
64 const attrs = token.attrs;
65
66 for (let i = 0; i < attrs.length; i++) {
67 res += ` ${attrs[i].name}="${escapeString(attrs[i].value, true)}"`;
68 }
69
70 res += token.selfClosing ? '/>' : '>';
71
72 this.push(res);
73 }
74
75 emitEndTag(token) {
76 this.push(`</${token.tagName}>`);
77 }
78
79 emitText({ text }) {
80 this.push(escapeString(text, false));
81 }
82
83 emitComment(token) {
84 this.push(`<!--${token.text}-->`);
85 }
86
87 emitRaw(html) {
88 this.push(html);
89 }
90}
91
92module.exports = RewritingStream;
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