| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 |
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| 6 | "use strict";
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| 7 |
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| 8 | const getGeneratedSourceInfo = require("./getGeneratedSourceInfo");
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| 9 | const getSource = require("./getSource");
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| 10 | const readMappings = require("./readMappings");
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| 11 | const splitIntoLines = require("./splitIntoLines");
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| 12 |
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| 13 | const streamChunksOfSourceMapFull = (
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| 14 | source,
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| 15 | sourceMap,
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| 16 | onChunk,
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| 17 | onSource,
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| 18 | onName
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| 19 | ) => {
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| 20 | const lines = splitIntoLines(source);
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| 21 | if (lines.length === 0) {
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| 22 | return {
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| 23 | generatedLine: 1,
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| 24 | generatedColumn: 0
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| 25 | };
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| 26 | }
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| 27 | const { sources, sourcesContent, names, mappings } = sourceMap;
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| 28 | for (let i = 0; i < sources.length; i++) {
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| 29 | onSource(
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| 30 | i,
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| 31 | getSource(sourceMap, i),
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| 32 | (sourcesContent && sourcesContent[i]) || undefined
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| 33 | );
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| 34 | }
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| 35 | if (names) {
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| 36 | for (let i = 0; i < names.length; i++) {
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| 37 | onName(i, names[i]);
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| 38 | }
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| 39 | }
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| 40 |
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| 41 | const lastLine = lines[lines.length - 1];
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| 42 | const lastNewLine = lastLine.endsWith("\n");
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| 43 | const finalLine = lastNewLine ? lines.length + 1 : lines.length;
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| 44 | const finalColumn = lastNewLine ? 0 : lastLine.length;
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| 45 |
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| 46 | let currentGeneratedLine = 1;
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| 47 | let currentGeneratedColumn = 0;
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| 48 |
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| 49 | let mappingActive = false;
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| 50 | let activeMappingSourceIndex = -1;
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| 51 | let activeMappingOriginalLine = -1;
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| 52 | let activeMappingOriginalColumn = -1;
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| 53 | let activeMappingNameIndex = -1;
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| 54 |
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| 55 | const onMapping = (
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| 56 | generatedLine,
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| 57 | generatedColumn,
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| 58 | sourceIndex,
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| 59 | originalLine,
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| 60 | originalColumn,
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| 61 | nameIndex
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| 62 | ) => {
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| 63 | if (mappingActive && currentGeneratedLine <= lines.length) {
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| 64 | let chunk;
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| 65 | const mappingLine = currentGeneratedLine;
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| 66 | const mappingColumn = currentGeneratedColumn;
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| 67 | const line = lines[currentGeneratedLine - 1];
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| 68 | if (generatedLine !== currentGeneratedLine) {
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| 69 | chunk = line.slice(currentGeneratedColumn);
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| 70 | currentGeneratedLine++;
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| 71 | currentGeneratedColumn = 0;
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| 72 | } else {
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| 73 | chunk = line.slice(currentGeneratedColumn, generatedColumn);
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| 74 | currentGeneratedColumn = generatedColumn;
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| 75 | }
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| 76 | if (chunk) {
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| 77 | onChunk(
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| 78 | chunk,
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| 79 | mappingLine,
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| 80 | mappingColumn,
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| 81 | activeMappingSourceIndex,
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| 82 | activeMappingOriginalLine,
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| 83 | activeMappingOriginalColumn,
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| 84 | activeMappingNameIndex
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| 85 | );
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| 86 | }
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| 87 | mappingActive = false;
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| 88 | }
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| 89 | if (generatedLine > currentGeneratedLine && currentGeneratedColumn > 0) {
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| 90 | if (currentGeneratedLine <= lines.length) {
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| 91 | const chunk = lines[currentGeneratedLine - 1].slice(
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| 92 | currentGeneratedColumn
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| 93 | );
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| 94 | onChunk(
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| 95 | chunk,
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| 96 | currentGeneratedLine,
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| 97 | currentGeneratedColumn,
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| 98 | -1,
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| 99 | -1,
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| 100 | -1,
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| 101 | -1
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| 102 | );
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| 103 | }
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| 104 | currentGeneratedLine++;
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| 105 | currentGeneratedColumn = 0;
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| 106 | }
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| 107 | while (generatedLine > currentGeneratedLine) {
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| 108 | if (currentGeneratedLine <= lines.length) {
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| 109 | onChunk(
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| 110 | lines[currentGeneratedLine - 1],
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| 111 | currentGeneratedLine,
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| 112 | 0,
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| 113 | -1,
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| 114 | -1,
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| 115 | -1,
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| 116 | -1
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| 117 | );
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| 118 | }
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| 119 | currentGeneratedLine++;
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| 120 | }
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| 121 | if (generatedColumn > currentGeneratedColumn) {
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| 122 | if (currentGeneratedLine <= lines.length) {
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| 123 | const chunk = lines[currentGeneratedLine - 1].slice(
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| 124 | currentGeneratedColumn,
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| 125 | generatedColumn
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| 126 | );
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| 127 | onChunk(
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| 128 | chunk,
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| 129 | currentGeneratedLine,
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| 130 | currentGeneratedColumn,
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| 131 | -1,
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| 132 | -1,
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| 133 | -1,
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| 134 | -1
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| 135 | );
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| 136 | }
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| 137 | currentGeneratedColumn = generatedColumn;
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| 138 | }
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| 139 | if (
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| 140 | sourceIndex >= 0 &&
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| 141 | (generatedLine < finalLine ||
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| 142 | (generatedLine === finalLine && generatedColumn < finalColumn))
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| 143 | ) {
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| 144 | mappingActive = true;
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| 145 | activeMappingSourceIndex = sourceIndex;
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| 146 | activeMappingOriginalLine = originalLine;
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| 147 | activeMappingOriginalColumn = originalColumn;
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| 148 | activeMappingNameIndex = nameIndex;
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| 149 | }
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| 150 | };
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| 151 | readMappings(mappings, onMapping);
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| 152 | onMapping(finalLine, finalColumn, -1, -1, -1, -1);
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| 153 | return {
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| 154 | generatedLine: finalLine,
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| 155 | generatedColumn: finalColumn
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| 156 | };
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| 157 | };
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| 158 |
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| 159 | const streamChunksOfSourceMapLinesFull = (
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| 160 | source,
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| 161 | sourceMap,
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| 162 | onChunk,
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| 163 | onSource,
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| 164 | _onName
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| 165 | ) => {
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| 166 | const lines = splitIntoLines(source);
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| 167 | if (lines.length === 0) {
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| 168 | return {
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| 169 | generatedLine: 1,
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| 170 | generatedColumn: 0
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| 171 | };
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| 172 | }
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| 173 | const { sources, sourcesContent, mappings } = sourceMap;
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| 174 | for (let i = 0; i < sources.length; i++) {
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| 175 | onSource(
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| 176 | i,
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| 177 | getSource(sourceMap, i),
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| 178 | (sourcesContent && sourcesContent[i]) || undefined
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| 179 | );
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| 180 | }
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| 181 |
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| 182 | let currentGeneratedLine = 1;
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| 183 |
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| 184 | const onMapping = (
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| 185 | generatedLine,
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| 186 | _generatedColumn,
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| 187 | sourceIndex,
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| 188 | originalLine,
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| 189 | originalColumn,
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| 190 | _nameIndex
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| 191 | ) => {
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| 192 | if (
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| 193 | sourceIndex < 0 ||
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| 194 | generatedLine < currentGeneratedLine ||
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| 195 | generatedLine > lines.length
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| 196 | ) {
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| 197 | return;
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| 198 | }
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| 199 | while (generatedLine > currentGeneratedLine) {
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| 200 | if (currentGeneratedLine <= lines.length) {
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| 201 | onChunk(
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| 202 | lines[currentGeneratedLine - 1],
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| 203 | currentGeneratedLine,
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| 204 | 0,
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| 205 | -1,
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| 206 | -1,
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| 207 | -1,
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| 208 | -1
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| 209 | );
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| 210 | }
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| 211 | currentGeneratedLine++;
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| 212 | }
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| 213 | if (generatedLine <= lines.length) {
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| 214 | onChunk(
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| 215 | lines[generatedLine - 1],
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| 216 | generatedLine,
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| 217 | 0,
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| 218 | sourceIndex,
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| 219 | originalLine,
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| 220 | originalColumn,
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| 221 | -1
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| 222 | );
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| 223 | currentGeneratedLine++;
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| 224 | }
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| 225 | };
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| 226 | readMappings(mappings, onMapping);
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| 227 | for (; currentGeneratedLine <= lines.length; currentGeneratedLine++) {
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| 228 | onChunk(
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| 229 | lines[currentGeneratedLine - 1],
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| 230 | currentGeneratedLine,
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| 231 | 0,
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| 232 | -1,
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| 233 | -1,
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| 234 | -1,
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| 235 | -1
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| 236 | );
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| 237 | }
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| 238 |
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| 239 | const lastLine = lines[lines.length - 1];
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| 240 | const lastNewLine = lastLine.endsWith("\n");
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| 241 |
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| 242 | const finalLine = lastNewLine ? lines.length + 1 : lines.length;
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| 243 | const finalColumn = lastNewLine ? 0 : lastLine.length;
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| 244 |
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| 245 | return {
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| 246 | generatedLine: finalLine,
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| 247 | generatedColumn: finalColumn
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| 248 | };
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| 249 | };
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| 250 |
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| 251 | const streamChunksOfSourceMapFinal = (
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| 252 | source,
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| 253 | sourceMap,
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| 254 | onChunk,
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| 255 | onSource,
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| 256 | onName
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| 257 | ) => {
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| 258 | const result = getGeneratedSourceInfo(source);
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| 259 | const { generatedLine: finalLine, generatedColumn: finalColumn } = result;
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| 260 |
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| 261 | if (finalLine === 1 && finalColumn === 0) return result;
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| 262 | const { sources, sourcesContent, names, mappings } = sourceMap;
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| 263 | for (let i = 0; i < sources.length; i++) {
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| 264 | onSource(
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| 265 | i,
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| 266 | getSource(sourceMap, i),
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| 267 | (sourcesContent && sourcesContent[i]) || undefined
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| 268 | );
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| 269 | }
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| 270 | if (names) {
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| 271 | for (let i = 0; i < names.length; i++) {
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| 272 | onName(i, names[i]);
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| 273 | }
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| 274 | }
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| 275 |
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| 276 | let mappingActiveLine = 0;
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| 277 |
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| 278 | const onMapping = (
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| 279 | generatedLine,
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| 280 | generatedColumn,
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| 281 | sourceIndex,
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| 282 | originalLine,
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| 283 | originalColumn,
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| 284 | nameIndex
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| 285 | ) => {
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| 286 | if (
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| 287 | generatedLine >= finalLine &&
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| 288 | (generatedColumn >= finalColumn || generatedLine > finalLine)
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| 289 | ) {
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| 290 | return;
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| 291 | }
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| 292 | if (sourceIndex >= 0) {
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| 293 | onChunk(
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| 294 | undefined,
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| 295 | generatedLine,
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| 296 | generatedColumn,
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| 297 | sourceIndex,
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| 298 | originalLine,
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| 299 | originalColumn,
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| 300 | nameIndex
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| 301 | );
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| 302 | mappingActiveLine = generatedLine;
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| 303 | } else if (mappingActiveLine === generatedLine) {
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| 304 | onChunk(undefined, generatedLine, generatedColumn, -1, -1, -1, -1);
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| 305 | mappingActiveLine = 0;
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| 306 | }
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| 307 | };
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| 308 | readMappings(mappings, onMapping);
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| 309 | return result;
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| 310 | };
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| 311 |
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| 312 | const streamChunksOfSourceMapLinesFinal = (
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| 313 | source,
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| 314 | sourceMap,
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| 315 | onChunk,
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| 316 | onSource,
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| 317 | _onName
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| 318 | ) => {
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| 319 | const result = getGeneratedSourceInfo(source);
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| 320 | const { generatedLine, generatedColumn } = result;
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| 321 | if (generatedLine === 1 && generatedColumn === 0) {
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| 322 | return {
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| 323 | generatedLine: 1,
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| 324 | generatedColumn: 0
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| 325 | };
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| 326 | }
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| 327 |
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| 328 | const { sources, sourcesContent, mappings } = sourceMap;
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| 329 | for (let i = 0; i < sources.length; i++) {
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| 330 | onSource(
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| 331 | i,
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| 332 | getSource(sourceMap, i),
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| 333 | (sourcesContent && sourcesContent[i]) || undefined
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| 334 | );
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| 335 | }
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| 336 |
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| 337 | const finalLine = generatedColumn === 0 ? generatedLine - 1 : generatedLine;
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| 338 |
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| 339 | let currentGeneratedLine = 1;
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| 340 |
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| 341 | const onMapping = (
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| 342 | generatedLine,
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| 343 | _generatedColumn,
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| 344 | sourceIndex,
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| 345 | originalLine,
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| 346 | originalColumn,
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| 347 | _nameIndex
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| 348 | ) => {
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| 349 | if (
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| 350 | sourceIndex >= 0 &&
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| 351 | currentGeneratedLine <= generatedLine &&
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| 352 | generatedLine <= finalLine
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| 353 | ) {
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| 354 | onChunk(
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| 355 | undefined,
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| 356 | generatedLine,
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| 357 | 0,
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| 358 | sourceIndex,
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| 359 | originalLine,
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| 360 | originalColumn,
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| 361 | -1
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| 362 | );
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| 363 | currentGeneratedLine = generatedLine + 1;
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| 364 | }
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| 365 | };
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| 366 | readMappings(mappings, onMapping);
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| 367 | return result;
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| 368 | };
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| 369 |
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| 370 | module.exports = (
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| 371 | source,
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| 372 | sourceMap,
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| 373 | onChunk,
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| 374 | onSource,
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| 375 | onName,
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| 376 | finalSource,
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| 377 | columns
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| 378 | ) => {
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| 379 | if (columns) {
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| 380 | return finalSource
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| 381 | ? streamChunksOfSourceMapFinal(
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| 382 | source,
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| 383 | sourceMap,
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| 384 | onChunk,
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| 385 | onSource,
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| 386 | onName
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| 387 | )
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| 388 | : streamChunksOfSourceMapFull(
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| 389 | source,
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| 390 | sourceMap,
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| 391 | onChunk,
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| 392 | onSource,
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| 393 | onName
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| 394 | );
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| 395 | } else {
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| 396 | return finalSource
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| 397 | ? streamChunksOfSourceMapLinesFinal(
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| 398 | source,
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| 399 | sourceMap,
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| 400 | onChunk,
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| 401 | onSource,
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| 402 | onName
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| 403 | )
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| 404 | : streamChunksOfSourceMapLinesFull(
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| 405 | source,
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| 406 | sourceMap,
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| 407 | onChunk,
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| 408 | onSource,
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| 409 | onName
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| 410 | );
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| 411 | }
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| 412 | };
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