source: trip-planner-front/node_modules/css-tree/lib/common/OffsetToLocation.js@ 6a3a178

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

initial commit

  • Property mode set to 100644
File size: 2.6 KB
Line 
1var adoptBuffer = require('./adopt-buffer');
2var isBOM = require('../tokenizer').isBOM;
3
4var N = 10;
5var F = 12;
6var R = 13;
7
8function computeLinesAndColumns(host, source) {
9 var sourceLength = source.length;
10 var lines = adoptBuffer(host.lines, sourceLength); // +1
11 var line = host.startLine;
12 var columns = adoptBuffer(host.columns, sourceLength);
13 var column = host.startColumn;
14 var startOffset = source.length > 0 ? isBOM(source.charCodeAt(0)) : 0;
15
16 for (var i = startOffset; i < sourceLength; i++) { // -1
17 var code = source.charCodeAt(i);
18
19 lines[i] = line;
20 columns[i] = column++;
21
22 if (code === N || code === R || code === F) {
23 if (code === R && i + 1 < sourceLength && source.charCodeAt(i + 1) === N) {
24 i++;
25 lines[i] = line;
26 columns[i] = column;
27 }
28
29 line++;
30 column = 1;
31 }
32 }
33
34 lines[i] = line;
35 columns[i] = column;
36
37 host.lines = lines;
38 host.columns = columns;
39}
40
41var OffsetToLocation = function() {
42 this.lines = null;
43 this.columns = null;
44 this.linesAndColumnsComputed = false;
45};
46
47OffsetToLocation.prototype = {
48 setSource: function(source, startOffset, startLine, startColumn) {
49 this.source = source;
50 this.startOffset = typeof startOffset === 'undefined' ? 0 : startOffset;
51 this.startLine = typeof startLine === 'undefined' ? 1 : startLine;
52 this.startColumn = typeof startColumn === 'undefined' ? 1 : startColumn;
53 this.linesAndColumnsComputed = false;
54 },
55
56 ensureLinesAndColumnsComputed: function() {
57 if (!this.linesAndColumnsComputed) {
58 computeLinesAndColumns(this, this.source);
59 this.linesAndColumnsComputed = true;
60 }
61 },
62 getLocation: function(offset, filename) {
63 this.ensureLinesAndColumnsComputed();
64
65 return {
66 source: filename,
67 offset: this.startOffset + offset,
68 line: this.lines[offset],
69 column: this.columns[offset]
70 };
71 },
72 getLocationRange: function(start, end, filename) {
73 this.ensureLinesAndColumnsComputed();
74
75 return {
76 source: filename,
77 start: {
78 offset: this.startOffset + start,
79 line: this.lines[start],
80 column: this.columns[start]
81 },
82 end: {
83 offset: this.startOffset + end,
84 line: this.lines[end],
85 column: this.columns[end]
86 }
87 };
88 }
89};
90
91module.exports = OffsetToLocation;
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