| 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 | /** @typedef {import("../Source").RawSourceMap} RawSourceMap */
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| 14 | /** @typedef {import("./getGeneratedSourceInfo").GeneratedSourceInfo} GeneratedSourceInfo */
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| 15 | /** @typedef {import("./streamChunks").OnChunk} OnChunk */
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| 16 | /** @typedef {import("./streamChunks").OnName} OnName */
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| 17 | /** @typedef {import("./streamChunks").OnSource} OnSource */
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| 18 |
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| 19 | /**
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| 20 | * @param {string} source source
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| 21 | * @param {RawSourceMap} sourceMap source map
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| 22 | * @param {OnChunk} onChunk on chunk
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| 23 | * @param {OnSource} onSource on source
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| 24 | * @param {OnName} onName on name
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| 25 | * @returns {GeneratedSourceInfo} generated source info
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| 26 | */
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| 27 | const streamChunksOfSourceMapFull = (
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| 28 | source,
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| 29 | sourceMap,
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| 30 | onChunk,
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| 31 | onSource,
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| 32 | onName,
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| 33 | ) => {
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| 34 | const lines = splitIntoLines(source);
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| 35 | const linesLength = lines.length;
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| 36 | if (linesLength === 0) {
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| 37 | return {
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| 38 | generatedLine: 1,
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| 39 | generatedColumn: 0,
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| 40 | };
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| 41 | }
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| 42 | const { sources, sourcesContent, names, mappings } = sourceMap;
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| 43 | for (let i = 0; i < sources.length; i++) {
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| 44 | onSource(
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| 45 | i,
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| 46 | getSource(sourceMap, i),
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| 47 | (sourcesContent && sourcesContent[i]) || undefined,
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| 48 | );
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| 49 | }
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| 50 | if (names) {
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| 51 | for (let i = 0; i < names.length; i++) {
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| 52 | onName(i, names[i]);
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| 53 | }
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| 54 | }
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| 55 |
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| 56 | const lastLine = lines[linesLength - 1];
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| 57 | const lastNewLine = lastLine.endsWith("\n");
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| 58 | const finalLine = lastNewLine ? linesLength + 1 : linesLength;
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| 59 | const finalColumn = lastNewLine ? 0 : lastLine.length;
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| 60 |
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| 61 | let currentGeneratedLine = 1;
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| 62 | let currentGeneratedColumn = 0;
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| 63 |
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| 64 | let mappingActive = false;
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| 65 | let activeMappingSourceIndex = -1;
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| 66 | let activeMappingOriginalLine = -1;
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| 67 | let activeMappingOriginalColumn = -1;
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| 68 | let activeMappingNameIndex = -1;
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| 69 |
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| 70 | /**
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| 71 | * @param {number} generatedLine generated line
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| 72 | * @param {number} generatedColumn generated column
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| 73 | * @param {number} sourceIndex source index
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| 74 | * @param {number} originalLine original line
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| 75 | * @param {number} originalColumn original column
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| 76 | * @param {number} nameIndex name index
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| 77 | * @returns {void}
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| 78 | */
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| 79 | const onMapping = (
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| 80 | generatedLine,
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| 81 | generatedColumn,
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| 82 | sourceIndex,
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| 83 | originalLine,
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| 84 | originalColumn,
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| 85 | nameIndex,
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| 86 | ) => {
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| 87 | if (mappingActive && currentGeneratedLine <= linesLength) {
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| 88 | let chunk;
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| 89 | const mappingLine = currentGeneratedLine;
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| 90 | const mappingColumn = currentGeneratedColumn;
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| 91 | const line = lines[currentGeneratedLine - 1];
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| 92 | if (generatedLine !== currentGeneratedLine) {
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| 93 | chunk = line.slice(currentGeneratedColumn);
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| 94 | currentGeneratedLine++;
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| 95 | currentGeneratedColumn = 0;
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| 96 | } else {
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| 97 | chunk = line.slice(currentGeneratedColumn, generatedColumn);
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| 98 | currentGeneratedColumn = generatedColumn;
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| 99 | }
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| 100 | if (chunk) {
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| 101 | onChunk(
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| 102 | chunk,
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| 103 | mappingLine,
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| 104 | mappingColumn,
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| 105 | activeMappingSourceIndex,
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| 106 | activeMappingOriginalLine,
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| 107 | activeMappingOriginalColumn,
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| 108 | activeMappingNameIndex,
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| 109 | );
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| 110 | }
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| 111 | mappingActive = false;
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| 112 | }
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| 113 | if (generatedLine > currentGeneratedLine && currentGeneratedColumn > 0) {
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| 114 | if (currentGeneratedLine <= linesLength) {
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| 115 | const chunk = lines[currentGeneratedLine - 1].slice(
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| 116 | currentGeneratedColumn,
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| 117 | );
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| 118 | onChunk(
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| 119 | chunk,
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| 120 | currentGeneratedLine,
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| 121 | currentGeneratedColumn,
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| 122 | -1,
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| 123 | -1,
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| 124 | -1,
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| 125 | -1,
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| 126 | );
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| 127 | }
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| 128 | currentGeneratedLine++;
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| 129 | currentGeneratedColumn = 0;
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| 130 | }
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| 131 | // Emit each fully-passed generated line. Once we move past the last
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| 132 | // available line we stop emitting, but still need to advance the
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| 133 | // counter to `generatedLine` so subsequent state matches the caller.
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| 134 | while (
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| 135 | generatedLine > currentGeneratedLine &&
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| 136 | currentGeneratedLine <= linesLength
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| 137 | ) {
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| 138 | onChunk(
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| 139 | lines[currentGeneratedLine - 1],
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| 140 | currentGeneratedLine,
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| 141 | 0,
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| 142 | -1,
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| 143 | -1,
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| 144 | -1,
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| 145 | -1,
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| 146 | );
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| 147 | currentGeneratedLine++;
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| 148 | }
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| 149 | if (currentGeneratedLine < generatedLine) {
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| 150 | currentGeneratedLine = generatedLine;
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| 151 | }
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| 152 | if (generatedColumn > currentGeneratedColumn) {
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| 153 | if (currentGeneratedLine <= linesLength) {
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| 154 | const chunk = lines[currentGeneratedLine - 1].slice(
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| 155 | currentGeneratedColumn,
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| 156 | generatedColumn,
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| 157 | );
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| 158 | onChunk(
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| 159 | chunk,
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| 160 | currentGeneratedLine,
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| 161 | currentGeneratedColumn,
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| 162 | -1,
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| 163 | -1,
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| 164 | -1,
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| 165 | -1,
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| 166 | );
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| 167 | }
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| 168 | currentGeneratedColumn = generatedColumn;
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| 169 | }
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| 170 | if (
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| 171 | sourceIndex >= 0 &&
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| 172 | (generatedLine < finalLine ||
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| 173 | (generatedLine === finalLine && generatedColumn < finalColumn))
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| 174 | ) {
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| 175 | mappingActive = true;
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| 176 | activeMappingSourceIndex = sourceIndex;
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| 177 | activeMappingOriginalLine = originalLine;
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| 178 | activeMappingOriginalColumn = originalColumn;
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| 179 | activeMappingNameIndex = nameIndex;
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| 180 | }
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| 181 | };
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| 182 | readMappings(mappings, onMapping);
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| 183 | onMapping(finalLine, finalColumn, -1, -1, -1, -1);
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| 184 | return {
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| 185 | generatedLine: finalLine,
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| 186 | generatedColumn: finalColumn,
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| 187 | };
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| 188 | };
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| 189 |
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| 190 | /**
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| 191 | * @param {string} source source
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| 192 | * @param {RawSourceMap} sourceMap source map
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| 193 | * @param {OnChunk} onChunk on chunk
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| 194 | * @param {OnSource} onSource on source
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| 195 | * @param {OnName} _onName on name
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| 196 | * @returns {GeneratedSourceInfo} generated source info
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| 197 | */
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| 198 | const streamChunksOfSourceMapLinesFull = (
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| 199 | source,
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| 200 | sourceMap,
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| 201 | onChunk,
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| 202 | onSource,
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| 203 | _onName,
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| 204 | ) => {
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| 205 | const lines = splitIntoLines(source);
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| 206 | const linesLength = lines.length;
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| 207 | if (linesLength === 0) {
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| 208 | return {
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| 209 | generatedLine: 1,
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| 210 | generatedColumn: 0,
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| 211 | };
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| 212 | }
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| 213 | const { sources, sourcesContent, mappings } = sourceMap;
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| 214 | for (let i = 0; i < sources.length; i++) {
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| 215 | onSource(
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| 216 | i,
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| 217 | getSource(sourceMap, i),
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| 218 | (sourcesContent && sourcesContent[i]) || undefined,
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| 219 | );
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| 220 | }
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| 221 |
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| 222 | let currentGeneratedLine = 1;
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| 223 |
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| 224 | /**
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| 225 | * @param {number} generatedLine generated line
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| 226 | * @param {number} _generatedColumn generated column
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| 227 | * @param {number} sourceIndex source index
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| 228 | * @param {number} originalLine original line
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| 229 | * @param {number} originalColumn original column
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| 230 | * @param {number} _nameIndex name index
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| 231 | * @returns {void}
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| 232 | */
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| 233 | const onMapping = (
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| 234 | generatedLine,
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| 235 | _generatedColumn,
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| 236 | sourceIndex,
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| 237 | originalLine,
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| 238 | originalColumn,
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| 239 | _nameIndex,
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| 240 | ) => {
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| 241 | if (
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| 242 | sourceIndex < 0 ||
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| 243 | generatedLine < currentGeneratedLine ||
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| 244 | generatedLine > linesLength
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| 245 | ) {
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| 246 | return;
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| 247 | }
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| 248 | // `generatedLine <= linesLength` is guaranteed by the guard above, so
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| 249 | // every line we iterate over is in bounds — no per-iteration length
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| 250 | // check needed.
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| 251 | while (generatedLine > currentGeneratedLine) {
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| 252 | onChunk(
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| 253 | lines[currentGeneratedLine - 1],
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| 254 | currentGeneratedLine,
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| 255 | 0,
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| 256 | -1,
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| 257 | -1,
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| 258 | -1,
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| 259 | -1,
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| 260 | );
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| 261 | currentGeneratedLine++;
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| 262 | }
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| 263 | onChunk(
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| 264 | lines[generatedLine - 1],
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| 265 | generatedLine,
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| 266 | 0,
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| 267 | sourceIndex,
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| 268 | originalLine,
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| 269 | originalColumn,
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| 270 | -1,
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| 271 | );
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| 272 | currentGeneratedLine++;
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| 273 | };
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| 274 | readMappings(mappings, onMapping);
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| 275 | for (; currentGeneratedLine <= linesLength; currentGeneratedLine++) {
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| 276 | onChunk(
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| 277 | lines[currentGeneratedLine - 1],
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| 278 | currentGeneratedLine,
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| 279 | 0,
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| 280 | -1,
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| 281 | -1,
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| 282 | -1,
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| 283 | -1,
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| 284 | );
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| 285 | }
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| 286 |
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| 287 | const lastLine = lines[linesLength - 1];
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| 288 | const lastNewLine = lastLine.endsWith("\n");
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| 289 |
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| 290 | const finalLine = lastNewLine ? linesLength + 1 : linesLength;
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| 291 | const finalColumn = lastNewLine ? 0 : lastLine.length;
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| 292 |
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| 293 | return {
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| 294 | generatedLine: finalLine,
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| 295 | generatedColumn: finalColumn,
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| 296 | };
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| 297 | };
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| 298 |
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| 299 | /**
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| 300 | * @param {string} source source
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| 301 | * @param {RawSourceMap} sourceMap source map
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| 302 | * @param {OnChunk} onChunk on chunk
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| 303 | * @param {OnSource} onSource on source
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| 304 | * @param {OnName} onName on name
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| 305 | * @returns {GeneratedSourceInfo} generated source info
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| 306 | */
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| 307 | const streamChunksOfSourceMapFinal = (
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| 308 | source,
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| 309 | sourceMap,
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| 310 | onChunk,
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| 311 | onSource,
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| 312 | onName,
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| 313 | ) => {
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| 314 | const result = getGeneratedSourceInfo(source);
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| 315 | const { generatedLine: finalLine, generatedColumn: finalColumn } = result;
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| 316 |
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| 317 | if (finalLine === 1 && finalColumn === 0) return result;
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| 318 | const { sources, sourcesContent, names, mappings } = sourceMap;
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| 319 | for (let i = 0; i < sources.length; i++) {
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| 320 | onSource(
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| 321 | i,
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| 322 | getSource(sourceMap, i),
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| 323 | (sourcesContent && sourcesContent[i]) || undefined,
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| 324 | );
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| 325 | }
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| 326 | if (names) {
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| 327 | for (let i = 0; i < names.length; i++) {
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| 328 | onName(i, names[i]);
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| 329 | }
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| 330 | }
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| 331 |
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| 332 | let mappingActiveLine = 0;
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| 333 |
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| 334 | /**
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| 335 | * @param {number} generatedLine generated line
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| 336 | * @param {number} generatedColumn generated column
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| 337 | * @param {number} sourceIndex source index
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| 338 | * @param {number} originalLine original line
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| 339 | * @param {number} originalColumn original column
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| 340 | * @param {number} nameIndex name index
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| 341 | * @returns {void}
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| 342 | */
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| 343 | const onMapping = (
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| 344 | generatedLine,
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| 345 | generatedColumn,
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| 346 | sourceIndex,
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| 347 | originalLine,
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| 348 | originalColumn,
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| 349 | nameIndex,
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| 350 | ) => {
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| 351 | if (
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| 352 | generatedLine >= /** @type {number} */ (finalLine) &&
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| 353 | (generatedColumn >= /** @type {number} */ (finalColumn) ||
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| 354 | generatedLine > /** @type {number} */ (finalLine))
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| 355 | ) {
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| 356 | return;
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| 357 | }
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| 358 | if (sourceIndex >= 0) {
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| 359 | onChunk(
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| 360 | undefined,
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| 361 | generatedLine,
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| 362 | generatedColumn,
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| 363 | sourceIndex,
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| 364 | originalLine,
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| 365 | originalColumn,
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| 366 | nameIndex,
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| 367 | );
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| 368 | mappingActiveLine = generatedLine;
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| 369 | } else if (mappingActiveLine === generatedLine) {
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| 370 | onChunk(undefined, generatedLine, generatedColumn, -1, -1, -1, -1);
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| 371 | mappingActiveLine = 0;
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| 372 | }
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| 373 | };
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| 374 | readMappings(mappings, onMapping);
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| 375 | return result;
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| 376 | };
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| 377 |
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| 378 | /**
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| 379 | * @param {string} source source
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| 380 | * @param {RawSourceMap} sourceMap source map
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| 381 | * @param {OnChunk} onChunk on chunk
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| 382 | * @param {OnSource} onSource on source
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| 383 | * @param {OnName} _onName on name
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| 384 | * @returns {GeneratedSourceInfo} generated source info
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| 385 | */
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| 386 | const streamChunksOfSourceMapLinesFinal = (
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| 387 | source,
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| 388 | sourceMap,
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| 389 | onChunk,
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| 390 | onSource,
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| 391 | _onName,
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| 392 | ) => {
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| 393 | const result = getGeneratedSourceInfo(source);
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| 394 | const { generatedLine, generatedColumn } = result;
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| 395 | if (generatedLine === 1 && generatedColumn === 0) {
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| 396 | return {
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| 397 | generatedLine: 1,
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| 398 | generatedColumn: 0,
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| 399 | };
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| 400 | }
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| 401 |
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| 402 | const { sources, sourcesContent, mappings } = sourceMap;
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| 403 | for (let i = 0; i < sources.length; i++) {
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| 404 | onSource(
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| 405 | i,
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| 406 | getSource(sourceMap, i),
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| 407 | (sourcesContent && sourcesContent[i]) || undefined,
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| 408 | );
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| 409 | }
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| 410 |
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| 411 | const finalLine =
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| 412 | generatedColumn === 0
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| 413 | ? /** @type {number} */ (generatedLine) - 1
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| 414 | : /** @type {number} */ (generatedLine);
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| 415 |
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| 416 | let currentGeneratedLine = 1;
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| 417 |
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| 418 | /**
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| 419 | * @param {number} generatedLine generated line
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| 420 | * @param {number} _generatedColumn generated column
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| 421 | * @param {number} sourceIndex source index
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| 422 | * @param {number} originalLine original line
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| 423 | * @param {number} originalColumn original column
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| 424 | * @param {number} _nameIndex name index
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| 425 | * @returns {void}
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| 426 | */
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| 427 | const onMapping = (
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| 428 | generatedLine,
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| 429 | _generatedColumn,
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| 430 | sourceIndex,
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| 431 | originalLine,
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| 432 | originalColumn,
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| 433 | _nameIndex,
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| 434 | ) => {
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| 435 | if (
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| 436 | sourceIndex >= 0 &&
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| 437 | currentGeneratedLine <= generatedLine &&
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| 438 | generatedLine <= finalLine
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| 439 | ) {
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| 440 | onChunk(
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| 441 | undefined,
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| 442 | generatedLine,
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| 443 | 0,
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| 444 | sourceIndex,
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| 445 | originalLine,
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| 446 | originalColumn,
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| 447 | -1,
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| 448 | );
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| 449 | currentGeneratedLine = generatedLine + 1;
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| 450 | }
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| 451 | };
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| 452 | readMappings(mappings, onMapping);
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| 453 | return result;
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| 454 | };
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| 455 |
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| 456 | /**
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| 457 | * @param {string} source source
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| 458 | * @param {RawSourceMap} sourceMap source map
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| 459 | * @param {OnChunk} onChunk on chunk
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| 460 | * @param {OnSource} onSource on source
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| 461 | * @param {OnName} onName on name
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| 462 | * @param {boolean} finalSource final source
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| 463 | * @param {boolean} columns columns
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| 464 | * @returns {GeneratedSourceInfo} generated source info
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| 465 | */
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| 466 | module.exports = (
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| 467 | source,
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| 468 | sourceMap,
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| 469 | onChunk,
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| 470 | onSource,
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| 471 | onName,
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| 472 | finalSource,
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| 473 | columns,
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| 474 | ) => {
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| 475 | if (columns) {
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| 476 | return finalSource
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| 477 | ? streamChunksOfSourceMapFinal(
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| 478 | source,
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| 479 | sourceMap,
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| 480 | onChunk,
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| 481 | onSource,
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| 482 | onName,
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| 483 | )
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| 484 | : streamChunksOfSourceMapFull(
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| 485 | source,
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| 486 | sourceMap,
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| 487 | onChunk,
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| 488 | onSource,
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| 489 | onName,
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| 490 | );
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| 491 | }
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| 492 | return finalSource
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| 493 | ? streamChunksOfSourceMapLinesFinal(
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| 494 | source,
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| 495 | sourceMap,
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| 496 | onChunk,
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| 497 | onSource,
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| 498 | onName,
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| 499 | )
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| 500 | : streamChunksOfSourceMapLinesFull(
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| 501 | source,
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| 502 | sourceMap,
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| 503 | onChunk,
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| 504 | onSource,
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| 505 | onName,
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| 506 | );
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| 507 | };
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