| 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 streamChunksOfSourceMap = require("./streamChunksOfSourceMap");
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| 9 | const splitIntoLines = require("./splitIntoLines");
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| 10 |
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| 11 | const streamChunksOfCombinedSourceMap = (
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| 12 | source,
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| 13 | sourceMap,
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| 14 | innerSourceName,
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| 15 | innerSource,
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| 16 | innerSourceMap,
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| 17 | removeInnerSource,
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| 18 | onChunk,
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| 19 | onSource,
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| 20 | onName,
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| 21 | finalSource,
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| 22 | columns
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| 23 | ) => {
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| 24 | let sourceMapping = new Map();
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| 25 | let nameMapping = new Map();
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| 26 | const sourceIndexMapping = [];
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| 27 | const nameIndexMapping = [];
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| 28 | const nameIndexValueMapping = [];
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| 29 | let innerSourceIndex = -2;
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| 30 | const innerSourceIndexMapping = [];
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| 31 | const innerSourceIndexValueMapping = [];
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| 32 | const innerSourceContents = [];
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| 33 | const innerSourceContentLines = [];
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| 34 | const innerNameIndexMapping = [];
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| 35 | const innerNameIndexValueMapping = [];
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| 36 | const innerSourceMapLineData = [];
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| 37 | const findInnerMapping = (line, column) => {
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| 38 | if (line > innerSourceMapLineData.length) return -1;
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| 39 | const { mappingsData } = innerSourceMapLineData[line - 1];
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| 40 | let l = 0;
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| 41 | let r = mappingsData.length / 5;
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| 42 | while (l < r) {
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| 43 | let m = (l + r) >> 1;
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| 44 | if (mappingsData[m * 5] <= column) {
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| 45 | l = m + 1;
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| 46 | } else {
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| 47 | r = m;
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| 48 | }
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| 49 | }
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| 50 | if (l === 0) return -1;
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| 51 | return l - 1;
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| 52 | };
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| 53 | return streamChunksOfSourceMap(
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| 54 | source,
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| 55 | sourceMap,
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| 56 | (
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| 57 | chunk,
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| 58 | generatedLine,
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| 59 | generatedColumn,
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| 60 | sourceIndex,
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| 61 | originalLine,
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| 62 | originalColumn,
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| 63 | nameIndex
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| 64 | ) => {
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| 65 | // Check if this is a mapping to the inner source
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| 66 | if (sourceIndex === innerSourceIndex) {
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| 67 | // Check if there is a mapping in the inner source
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| 68 | const idx = findInnerMapping(originalLine, originalColumn);
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| 69 | if (idx !== -1) {
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| 70 | const { chunks, mappingsData } = innerSourceMapLineData[
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| 71 | originalLine - 1
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| 72 | ];
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| 73 | const mi = idx * 5;
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| 74 | const innerSourceIndex = mappingsData[mi + 1];
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| 75 | const innerOriginalLine = mappingsData[mi + 2];
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| 76 | let innerOriginalColumn = mappingsData[mi + 3];
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| 77 | let innerNameIndex = mappingsData[mi + 4];
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| 78 | if (innerSourceIndex >= 0) {
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| 79 | // Check for an identity mapping
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| 80 | // where we are allowed to adjust the original column
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| 81 | const innerChunk = chunks[idx];
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| 82 | const innerGeneratedColumn = mappingsData[mi];
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| 83 | const locationInChunk = originalColumn - innerGeneratedColumn;
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| 84 | if (locationInChunk > 0) {
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| 85 | let originalSourceLines =
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| 86 | innerSourceIndex < innerSourceContentLines.length
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| 87 | ? innerSourceContentLines[innerSourceIndex]
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| 88 | : null;
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| 89 | if (originalSourceLines === undefined) {
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| 90 | const originalSource = innerSourceContents[innerSourceIndex];
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| 91 | originalSourceLines = originalSource
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| 92 | ? splitIntoLines(originalSource)
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| 93 | : null;
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| 94 | innerSourceContentLines[innerSourceIndex] = originalSourceLines;
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| 95 | }
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| 96 | if (originalSourceLines !== null) {
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| 97 | const originalChunk =
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| 98 | innerOriginalLine <= originalSourceLines.length
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| 99 | ? originalSourceLines[innerOriginalLine - 1].slice(
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| 100 | innerOriginalColumn,
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| 101 | innerOriginalColumn + locationInChunk
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| 102 | )
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| 103 | : "";
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| 104 | if (innerChunk.slice(0, locationInChunk) === originalChunk) {
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| 105 | innerOriginalColumn += locationInChunk;
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| 106 | innerNameIndex = -1;
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| 107 | }
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| 108 | }
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| 109 | }
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| 110 |
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| 111 | // We have a inner mapping to original source
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| 112 |
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| 113 | // emit source when needed and compute global source index
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| 114 | let sourceIndex =
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| 115 | innerSourceIndex < innerSourceIndexMapping.length
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| 116 | ? innerSourceIndexMapping[innerSourceIndex]
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| 117 | : -2;
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| 118 | if (sourceIndex === -2) {
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| 119 | const [source, sourceContent] =
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| 120 | innerSourceIndex < innerSourceIndexValueMapping.length
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| 121 | ? innerSourceIndexValueMapping[innerSourceIndex]
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| 122 | : [null, undefined];
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| 123 | let globalIndex = sourceMapping.get(source);
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| 124 | if (globalIndex === undefined) {
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| 125 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 126 | onSource(globalIndex, source, sourceContent);
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| 127 | }
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| 128 | sourceIndex = globalIndex;
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| 129 | innerSourceIndexMapping[innerSourceIndex] = sourceIndex;
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| 130 | }
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| 131 |
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| 132 | // emit name when needed and compute global name index
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| 133 | let finalNameIndex = -1;
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| 134 | if (innerNameIndex >= 0) {
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| 135 | // when we have a inner name
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| 136 | finalNameIndex =
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| 137 | innerNameIndex < innerNameIndexMapping.length
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| 138 | ? innerNameIndexMapping[innerNameIndex]
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| 139 | : -2;
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| 140 | if (finalNameIndex === -2) {
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| 141 | const name =
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| 142 | innerNameIndex < innerNameIndexValueMapping.length
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| 143 | ? innerNameIndexValueMapping[innerNameIndex]
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| 144 | : undefined;
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| 145 | if (name) {
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| 146 | let globalIndex = nameMapping.get(name);
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| 147 | if (globalIndex === undefined) {
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| 148 | nameMapping.set(name, (globalIndex = nameMapping.size));
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| 149 | onName(globalIndex, name);
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| 150 | }
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| 151 | finalNameIndex = globalIndex;
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| 152 | } else {
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| 153 | finalNameIndex = -1;
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| 154 | }
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| 155 | innerNameIndexMapping[innerNameIndex] = finalNameIndex;
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| 156 | }
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| 157 | } else if (nameIndex >= 0) {
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| 158 | // when we don't have an inner name,
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| 159 | // but we have an outer name
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| 160 | // it can be used when inner original code equals to the name
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| 161 | let originalSourceLines =
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| 162 | innerSourceContentLines[innerSourceIndex];
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| 163 | if (originalSourceLines === undefined) {
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| 164 | const originalSource = innerSourceContents[innerSourceIndex];
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| 165 | originalSourceLines = originalSource
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| 166 | ? splitIntoLines(originalSource)
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| 167 | : null;
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| 168 | innerSourceContentLines[innerSourceIndex] = originalSourceLines;
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| 169 | }
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| 170 | if (originalSourceLines !== null) {
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| 171 | const name = nameIndexValueMapping[nameIndex];
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| 172 | const originalName =
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| 173 | innerOriginalLine <= originalSourceLines.length
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| 174 | ? originalSourceLines[innerOriginalLine - 1].slice(
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| 175 | innerOriginalColumn,
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| 176 | innerOriginalColumn + name.length
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| 177 | )
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| 178 | : "";
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| 179 | if (name === originalName) {
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| 180 | finalNameIndex =
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| 181 | nameIndex < nameIndexMapping.length
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| 182 | ? nameIndexMapping[nameIndex]
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| 183 | : -2;
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| 184 | if (finalNameIndex === -2) {
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| 185 | const name = nameIndexValueMapping[nameIndex];
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| 186 | if (name) {
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| 187 | let globalIndex = nameMapping.get(name);
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| 188 | if (globalIndex === undefined) {
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| 189 | nameMapping.set(name, (globalIndex = nameMapping.size));
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| 190 | onName(globalIndex, name);
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| 191 | }
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| 192 | finalNameIndex = globalIndex;
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| 193 | } else {
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| 194 | finalNameIndex = -1;
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| 195 | }
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| 196 | nameIndexMapping[nameIndex] = finalNameIndex;
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| 197 | }
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| 198 | }
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| 199 | }
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| 200 | }
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| 201 | onChunk(
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| 202 | chunk,
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| 203 | generatedLine,
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| 204 | generatedColumn,
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| 205 | sourceIndex,
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| 206 | innerOriginalLine,
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| 207 | innerOriginalColumn,
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| 208 | finalNameIndex
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| 209 | );
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| 210 | return;
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| 211 | }
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| 212 | }
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| 213 |
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| 214 | // We have a mapping to the inner source, but no inner mapping
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| 215 | if (removeInnerSource) {
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| 216 | onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
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| 217 | return;
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| 218 | } else {
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| 219 | if (sourceIndexMapping[sourceIndex] === -2) {
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| 220 | let globalIndex = sourceMapping.get(innerSourceName);
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| 221 | if (globalIndex === undefined) {
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| 222 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 223 | onSource(globalIndex, innerSourceName, innerSource);
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| 224 | }
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| 225 | sourceIndexMapping[sourceIndex] = globalIndex;
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| 226 | }
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| 227 | }
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| 228 | }
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| 229 |
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| 230 | const finalSourceIndex =
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| 231 | sourceIndex < 0 || sourceIndex >= sourceIndexMapping.length
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| 232 | ? -1
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| 233 | : sourceIndexMapping[sourceIndex];
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| 234 | if (finalSourceIndex < 0) {
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| 235 | // no source, so we make it a generated chunk
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| 236 | onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
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| 237 | } else {
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| 238 | // Pass through the chunk with mapping
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| 239 | let finalNameIndex = -1;
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| 240 | if (nameIndex >= 0 && nameIndex < nameIndexMapping.length) {
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| 241 | finalNameIndex = nameIndexMapping[nameIndex];
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| 242 | if (finalNameIndex === -2) {
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| 243 | const name = nameIndexValueMapping[nameIndex];
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| 244 | let globalIndex = nameMapping.get(name);
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| 245 | if (globalIndex === undefined) {
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| 246 | nameMapping.set(name, (globalIndex = nameMapping.size));
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| 247 | onName(globalIndex, name);
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| 248 | }
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| 249 | finalNameIndex = globalIndex;
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| 250 | nameIndexMapping[nameIndex] = finalNameIndex;
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| 251 | }
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| 252 | }
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| 253 | onChunk(
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| 254 | chunk,
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| 255 | generatedLine,
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| 256 | generatedColumn,
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| 257 | finalSourceIndex,
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| 258 | originalLine,
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| 259 | originalColumn,
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| 260 | finalNameIndex
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| 261 | );
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| 262 | }
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| 263 | },
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| 264 | (i, source, sourceContent) => {
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| 265 | if (source === innerSourceName) {
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| 266 | innerSourceIndex = i;
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| 267 | if (innerSource !== undefined) sourceContent = innerSource;
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| 268 | else innerSource = sourceContent;
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| 269 | sourceIndexMapping[i] = -2;
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| 270 | streamChunksOfSourceMap(
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| 271 | sourceContent,
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| 272 | innerSourceMap,
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| 273 | (
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| 274 | chunk,
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| 275 | generatedLine,
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| 276 | generatedColumn,
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| 277 | sourceIndex,
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| 278 | originalLine,
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| 279 | originalColumn,
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| 280 | nameIndex
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| 281 | ) => {
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| 282 | while (innerSourceMapLineData.length < generatedLine) {
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| 283 | innerSourceMapLineData.push({
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| 284 | mappingsData: [],
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| 285 | chunks: []
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| 286 | });
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| 287 | }
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| 288 | const data = innerSourceMapLineData[generatedLine - 1];
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| 289 | data.mappingsData.push(
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| 290 | generatedColumn,
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| 291 | sourceIndex,
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| 292 | originalLine,
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| 293 | originalColumn,
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| 294 | nameIndex
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| 295 | );
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| 296 | data.chunks.push(chunk);
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| 297 | },
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| 298 | (i, source, sourceContent) => {
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| 299 | innerSourceContents[i] = sourceContent;
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| 300 | innerSourceContentLines[i] = undefined;
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| 301 | innerSourceIndexMapping[i] = -2;
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| 302 | innerSourceIndexValueMapping[i] = [source, sourceContent];
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| 303 | },
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| 304 | (i, name) => {
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| 305 | innerNameIndexMapping[i] = -2;
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| 306 | innerNameIndexValueMapping[i] = name;
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| 307 | },
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| 308 | false,
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| 309 | columns
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| 310 | );
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| 311 | } else {
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| 312 | let globalIndex = sourceMapping.get(source);
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| 313 | if (globalIndex === undefined) {
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| 314 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 315 | onSource(globalIndex, source, sourceContent);
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| 316 | }
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| 317 | sourceIndexMapping[i] = globalIndex;
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| 318 | }
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| 319 | },
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| 320 | (i, name) => {
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| 321 | nameIndexMapping[i] = -2;
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| 322 | nameIndexValueMapping[i] = name;
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| 323 | },
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| 324 | finalSource,
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| 325 | columns
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| 326 | );
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| 327 | };
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| 328 |
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| 329 | module.exports = streamChunksOfCombinedSourceMap;
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