source: imaps-frontend/node_modules/webpack-sources/lib/helpers/createMappingsSerializer.js@ 79a0317

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Last change on this file since 79a0317 was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 4 days ago

F4 Finalna Verzija
  • Property mode set to 100644
File size: 5.0 KB
Line 
1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split(
9 ""
10);
11
12const CONTINUATION_BIT = 0x20;
13
14const createMappingsSerializer = options => {
15 const linesOnly = options && options.columns === false;
16 return linesOnly
17 ? createLinesOnlyMappingsSerializer()
18 : createFullMappingsSerializer();
19};
20
21const createFullMappingsSerializer = () => {
22 let currentLine = 1;
23 let currentColumn = 0;
24 let currentSourceIndex = 0;
25 let currentOriginalLine = 1;
26 let currentOriginalColumn = 0;
27 let currentNameIndex = 0;
28 let activeMapping = false;
29 let activeName = false;
30 let initial = true;
31 return (
32 generatedLine,
33 generatedColumn,
34 sourceIndex,
35 originalLine,
36 originalColumn,
37 nameIndex
38 ) => {
39 if (activeMapping && currentLine === generatedLine) {
40 // A mapping is still active
41 if (
42 sourceIndex === currentSourceIndex &&
43 originalLine === currentOriginalLine &&
44 originalColumn === currentOriginalColumn &&
45 !activeName &&
46 nameIndex < 0
47 ) {
48 // avoid repeating the same original mapping
49 return "";
50 }
51 } else {
52 // No mapping is active
53 if (sourceIndex < 0) {
54 // avoid writing unneccessary generated mappings
55 return "";
56 }
57 }
58
59 let str;
60 if (currentLine < generatedLine) {
61 str = ";".repeat(generatedLine - currentLine);
62 currentLine = generatedLine;
63 currentColumn = 0;
64 initial = false;
65 } else if (initial) {
66 str = "";
67 initial = false;
68 } else {
69 str = ",";
70 }
71
72 const writeValue = value => {
73 const sign = (value >>> 31) & 1;
74 const mask = value >> 31;
75 const absValue = (value + mask) ^ mask;
76 let data = (absValue << 1) | sign;
77 for (;;) {
78 const sextet = data & 0x1f;
79 data >>= 5;
80 if (data === 0) {
81 str += ALPHABET[sextet];
82 break;
83 } else {
84 str += ALPHABET[sextet | CONTINUATION_BIT];
85 }
86 }
87 };
88 writeValue(generatedColumn - currentColumn);
89 currentColumn = generatedColumn;
90 if (sourceIndex >= 0) {
91 activeMapping = true;
92 if (sourceIndex === currentSourceIndex) {
93 str += "A";
94 } else {
95 writeValue(sourceIndex - currentSourceIndex);
96 currentSourceIndex = sourceIndex;
97 }
98 writeValue(originalLine - currentOriginalLine);
99 currentOriginalLine = originalLine;
100 if (originalColumn === currentOriginalColumn) {
101 str += "A";
102 } else {
103 writeValue(originalColumn - currentOriginalColumn);
104 currentOriginalColumn = originalColumn;
105 }
106 if (nameIndex >= 0) {
107 writeValue(nameIndex - currentNameIndex);
108 currentNameIndex = nameIndex;
109 activeName = true;
110 } else {
111 activeName = false;
112 }
113 } else {
114 activeMapping = false;
115 }
116 return str;
117 };
118};
119
120const createLinesOnlyMappingsSerializer = () => {
121 let lastWrittenLine = 0;
122 let currentLine = 1;
123 let currentSourceIndex = 0;
124 let currentOriginalLine = 1;
125 return (
126 generatedLine,
127 _generatedColumn,
128 sourceIndex,
129 originalLine,
130 _originalColumn,
131 _nameIndex
132 ) => {
133 if (sourceIndex < 0) {
134 // avoid writing generated mappings at all
135 return "";
136 }
137 if (lastWrittenLine === generatedLine) {
138 // avoid writing multiple original mappings per line
139 return "";
140 }
141 let str;
142 const writeValue = value => {
143 const sign = (value >>> 31) & 1;
144 const mask = value >> 31;
145 const absValue = (value + mask) ^ mask;
146 let data = (absValue << 1) | sign;
147 for (;;) {
148 const sextet = data & 0x1f;
149 data >>= 5;
150 if (data === 0) {
151 str += ALPHABET[sextet];
152 break;
153 } else {
154 str += ALPHABET[sextet | CONTINUATION_BIT];
155 }
156 }
157 };
158 lastWrittenLine = generatedLine;
159 if (generatedLine === currentLine + 1) {
160 currentLine = generatedLine;
161 if (sourceIndex === currentSourceIndex) {
162 currentSourceIndex = sourceIndex;
163 if (originalLine === currentOriginalLine + 1) {
164 currentOriginalLine = originalLine;
165 return ";AACA";
166 } else {
167 str = ";AA";
168 writeValue(originalLine - currentOriginalLine);
169 currentOriginalLine = originalLine;
170 return str + "A";
171 }
172 } else {
173 str = ";A";
174 writeValue(sourceIndex - currentSourceIndex);
175 currentSourceIndex = sourceIndex;
176 writeValue(originalLine - currentOriginalLine);
177 currentOriginalLine = originalLine;
178 return str + "A";
179 }
180 } else {
181 str = ";".repeat(generatedLine - currentLine);
182 currentLine = generatedLine;
183 if (sourceIndex === currentSourceIndex) {
184 currentSourceIndex = sourceIndex;
185 if (originalLine === currentOriginalLine + 1) {
186 currentOriginalLine = originalLine;
187 return str + "AACA";
188 } else {
189 str += "AA";
190 writeValue(originalLine - currentOriginalLine);
191 currentOriginalLine = originalLine;
192 return str + "A";
193 }
194 } else {
195 str += "A";
196 writeValue(sourceIndex - currentSourceIndex);
197 currentSourceIndex = sourceIndex;
198 writeValue(originalLine - currentOriginalLine);
199 currentOriginalLine = originalLine;
200 return str + "A";
201 }
202 }
203 };
204};
205
206module.exports = createMappingsSerializer;
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