| 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 splitIntoLines = require("./splitIntoLines");
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| 9 | const streamChunksOfSourceMap = require("./streamChunksOfSourceMap");
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| 10 |
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| 11 | /** @typedef {import("../Source").RawSourceMap} RawSourceMap */
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| 12 | /** @typedef {import("./getGeneratedSourceInfo").GeneratedSourceInfo} GeneratedSourceInfo */
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| 13 | /** @typedef {import("./streamChunks").OnChunk} onChunk */
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| 14 | /** @typedef {import("./streamChunks").OnName} OnName */
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| 15 | /** @typedef {import("./streamChunks").OnSource} OnSource */
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| 16 |
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| 17 | /**
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| 18 | * @param {string} source source
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| 19 | * @param {RawSourceMap} sourceMap source map
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| 20 | * @param {string} innerSourceName inner source name
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| 21 | * @param {string} innerSource inner source
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| 22 | * @param {RawSourceMap} innerSourceMap inner source map
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| 23 | * @param {boolean | undefined} removeInnerSource do remove inner source
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| 24 | * @param {onChunk} onChunk on chunk
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| 25 | * @param {OnSource} onSource on source
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| 26 | * @param {OnName} onName on name
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| 27 | * @param {boolean} finalSource finalSource
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| 28 | * @param {boolean} columns columns
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| 29 | * @returns {GeneratedSourceInfo} generated source info
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| 30 | */
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| 31 | const streamChunksOfCombinedSourceMap = (
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| 32 | source,
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| 33 | sourceMap,
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| 34 | innerSourceName,
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| 35 | innerSource,
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| 36 | innerSourceMap,
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| 37 | removeInnerSource,
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| 38 | onChunk,
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| 39 | onSource,
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| 40 | onName,
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| 41 | finalSource,
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| 42 | columns,
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| 43 | ) => {
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| 44 | /** @type {Map<string | null, number>} */
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| 45 | const sourceMapping = new Map();
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| 46 | /** @type {Map<string, number>} */
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| 47 | const nameMapping = new Map();
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| 48 | /** @type {number[]} */
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| 49 | const sourceIndexMapping = [];
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| 50 | /** @type {number[]} */
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| 51 | const nameIndexMapping = [];
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| 52 | /** @type {string[]} */
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| 53 | const nameIndexValueMapping = [];
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| 54 | let outerSourceIndex = -2;
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| 55 | /** @type {number[]} */
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| 56 | const innerSourceIndexMapping = [];
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| 57 | /** @type {[string | null, string | undefined][]} */
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| 58 | const innerSourceIndexValueMapping = [];
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| 59 | /** @type {(string | undefined)[]} */
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| 60 | const innerSourceContents = [];
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| 61 | /** @type {(null | undefined | string[])[]} */
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| 62 | const innerSourceContentLines = [];
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| 63 | /** @type {number[]} */
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| 64 | const innerNameIndexMapping = [];
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| 65 | /** @type {string[]} */
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| 66 | const innerNameIndexValueMapping = [];
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| 67 | /** @typedef {[number, number, number, number, number] | number[]} MappingsData */
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| 68 | /** @type {{ chunks: string[], mappingsData: MappingsData }[]} */
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| 69 | const innerSourceMapLineData = [];
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| 70 | /**
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| 71 | * @param {number} line line
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| 72 | * @param {number} column column
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| 73 | * @returns {number} result
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| 74 | */
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| 75 | const findInnerMapping = (line, column) => {
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| 76 | if (line > innerSourceMapLineData.length) return -1;
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| 77 | const { mappingsData } = innerSourceMapLineData[line - 1];
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| 78 | let l = 0;
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| 79 | // `mappingsData.length` is always a multiple of 5 (five values pushed
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| 80 | // per mapping), so dividing is exact. Coerce the bound to an int32 so
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| 81 | // the binary-search loop stays on V8's fast small-int path instead of
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| 82 | // comparing an int against a float.
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| 83 | let r = (mappingsData.length / 5) | 0;
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| 84 | while (l < r) {
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| 85 | const m = (l + r) >> 1;
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| 86 | if (mappingsData[m * 5] <= column) {
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| 87 | l = m + 1;
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| 88 | } else {
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| 89 | r = m;
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| 90 | }
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| 91 | }
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| 92 | if (l === 0) return -1;
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| 93 | return l - 1;
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| 94 | };
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| 95 | return streamChunksOfSourceMap(
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| 96 | source,
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| 97 | sourceMap,
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| 98 | (
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| 99 | chunk,
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| 100 | generatedLine,
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| 101 | generatedColumn,
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| 102 | sourceIndex,
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| 103 | originalLine,
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| 104 | originalColumn,
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| 105 | nameIndex,
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| 106 | ) => {
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| 107 | // Check if this is a mapping to the inner source
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| 108 | if (sourceIndex === outerSourceIndex) {
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| 109 | // Check if there is a mapping in the inner source
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| 110 | const idx = findInnerMapping(originalLine, originalColumn);
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| 111 | if (idx !== -1) {
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| 112 | const { chunks, mappingsData } =
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| 113 | innerSourceMapLineData[originalLine - 1];
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| 114 | const mi = idx * 5;
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| 115 | const innerSourceIndex = mappingsData[mi + 1];
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| 116 | const innerOriginalLine = mappingsData[mi + 2];
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| 117 | let innerOriginalColumn = mappingsData[mi + 3];
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| 118 | let innerNameIndex = mappingsData[mi + 4];
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| 119 | if (innerSourceIndex >= 0) {
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| 120 | // Check for an identity mapping
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| 121 | // where we are allowed to adjust the original column
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| 122 | const innerChunk = chunks[idx];
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| 123 | const innerGeneratedColumn = mappingsData[mi];
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| 124 | const locationInChunk = originalColumn - innerGeneratedColumn;
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| 125 | if (locationInChunk > 0) {
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| 126 | let originalSourceLines =
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| 127 | innerSourceIndex < innerSourceContentLines.length
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| 128 | ? innerSourceContentLines[innerSourceIndex]
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| 129 | : null;
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| 130 | if (originalSourceLines === undefined) {
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| 131 | const originalSource = innerSourceContents[innerSourceIndex];
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| 132 | originalSourceLines = originalSource
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| 133 | ? splitIntoLines(originalSource)
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| 134 | : null;
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| 135 | innerSourceContentLines[innerSourceIndex] = originalSourceLines;
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| 136 | }
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| 137 | if (originalSourceLines !== null) {
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| 138 | const originalChunk =
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| 139 | innerOriginalLine <= originalSourceLines.length
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| 140 | ? originalSourceLines[innerOriginalLine - 1].slice(
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| 141 | innerOriginalColumn,
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| 142 | innerOriginalColumn + locationInChunk,
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| 143 | )
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| 144 | : "";
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| 145 | if (innerChunk.slice(0, locationInChunk) === originalChunk) {
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| 146 | innerOriginalColumn += locationInChunk;
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| 147 | innerNameIndex = -1;
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| 148 | }
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| 149 | }
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| 150 | }
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| 151 |
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| 152 | // We have a inner mapping to original source
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| 153 |
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| 154 | // emit source when needed and compute global source index
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| 155 | let sourceIndex =
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| 156 | innerSourceIndex < innerSourceIndexMapping.length
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| 157 | ? innerSourceIndexMapping[innerSourceIndex]
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| 158 | : -2;
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| 159 | if (sourceIndex === -2) {
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| 160 | const [source, sourceContent] =
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| 161 | innerSourceIndex < innerSourceIndexValueMapping.length
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| 162 | ? innerSourceIndexValueMapping[innerSourceIndex]
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| 163 | : [null, undefined];
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| 164 | let globalIndex = sourceMapping.get(source);
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| 165 | if (globalIndex === undefined) {
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| 166 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 167 | onSource(globalIndex, source, sourceContent);
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| 168 | }
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| 169 | sourceIndex = globalIndex;
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| 170 | innerSourceIndexMapping[innerSourceIndex] = sourceIndex;
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| 171 | }
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| 172 |
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| 173 | // emit name when needed and compute global name index
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| 174 | let finalNameIndex = -1;
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| 175 | if (innerNameIndex >= 0) {
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| 176 | // when we have a inner name
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| 177 | finalNameIndex =
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| 178 | innerNameIndex < innerNameIndexMapping.length
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| 179 | ? innerNameIndexMapping[innerNameIndex]
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| 180 | : -2;
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| 181 | if (finalNameIndex === -2) {
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| 182 | const name =
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| 183 | innerNameIndex < innerNameIndexValueMapping.length
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| 184 | ? innerNameIndexValueMapping[innerNameIndex]
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| 185 | : undefined;
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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 | innerNameIndexMapping[innerNameIndex] = finalNameIndex;
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| 197 | }
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| 198 | } else if (nameIndex >= 0) {
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| 199 | // when we don't have an inner name,
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| 200 | // but we have an outer name
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| 201 | // it can be used when inner original code equals to the name
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| 202 | let originalSourceLines =
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| 203 | innerSourceContentLines[innerSourceIndex];
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| 204 | if (originalSourceLines === undefined) {
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| 205 | const originalSource = innerSourceContents[innerSourceIndex];
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| 206 | originalSourceLines = originalSource
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| 207 | ? splitIntoLines(originalSource)
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| 208 | : null;
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| 209 | innerSourceContentLines[innerSourceIndex] = originalSourceLines;
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| 210 | }
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| 211 | if (originalSourceLines !== null) {
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| 212 | const name = nameIndexValueMapping[nameIndex];
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| 213 | const originalName =
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| 214 | innerOriginalLine <= originalSourceLines.length
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| 215 | ? originalSourceLines[innerOriginalLine - 1].slice(
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| 216 | innerOriginalColumn,
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| 217 | innerOriginalColumn + name.length,
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| 218 | )
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| 219 | : "";
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| 220 | if (name === originalName) {
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| 221 | finalNameIndex =
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| 222 | nameIndex < nameIndexMapping.length
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| 223 | ? nameIndexMapping[nameIndex]
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| 224 | : -2;
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| 225 | if (finalNameIndex === -2) {
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| 226 | const name = nameIndexValueMapping[nameIndex];
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| 227 | if (name) {
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| 228 | let globalIndex = nameMapping.get(name);
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| 229 | if (globalIndex === undefined) {
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| 230 | nameMapping.set(name, (globalIndex = nameMapping.size));
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| 231 | onName(globalIndex, name);
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| 232 | }
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| 233 | finalNameIndex = globalIndex;
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| 234 | } else {
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| 235 | finalNameIndex = -1;
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| 236 | }
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| 237 | nameIndexMapping[nameIndex] = finalNameIndex;
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| 238 | }
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| 239 | }
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| 240 | }
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| 241 | }
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| 242 | onChunk(
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| 243 | chunk,
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| 244 | generatedLine,
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| 245 | generatedColumn,
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| 246 | sourceIndex,
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| 247 | innerOriginalLine,
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| 248 | innerOriginalColumn,
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| 249 | finalNameIndex,
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| 250 | );
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| 251 | return;
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| 252 | }
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| 253 | }
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| 254 |
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| 255 | // We have a mapping to the inner source, but no inner mapping
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| 256 | if (removeInnerSource) {
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| 257 | onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
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| 258 | return;
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| 259 | }
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| 260 | if (sourceIndexMapping[sourceIndex] === -2) {
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| 261 | let globalIndex = sourceMapping.get(innerSourceName);
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| 262 | if (globalIndex === undefined) {
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| 263 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 264 | onSource(globalIndex, innerSourceName, innerSource);
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| 265 | }
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| 266 | sourceIndexMapping[sourceIndex] = globalIndex;
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| 267 | }
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| 268 | }
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| 269 |
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| 270 | const finalSourceIndex =
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| 271 | sourceIndex < 0 || sourceIndex >= sourceIndexMapping.length
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| 272 | ? -1
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| 273 | : sourceIndexMapping[sourceIndex];
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| 274 | if (finalSourceIndex < 0) {
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| 275 | // no source, so we make it a generated chunk
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| 276 | onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
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| 277 | } else {
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| 278 | // Pass through the chunk with mapping
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| 279 | let finalNameIndex = -1;
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| 280 | if (nameIndex >= 0 && nameIndex < nameIndexMapping.length) {
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| 281 | finalNameIndex = nameIndexMapping[nameIndex];
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| 282 | if (finalNameIndex === -2) {
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| 283 | const name = nameIndexValueMapping[nameIndex];
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| 284 | let globalIndex = nameMapping.get(name);
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| 285 | if (globalIndex === undefined) {
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| 286 | nameMapping.set(name, (globalIndex = nameMapping.size));
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| 287 | onName(globalIndex, name);
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| 288 | }
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| 289 | finalNameIndex = globalIndex;
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| 290 | nameIndexMapping[nameIndex] = finalNameIndex;
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| 291 | }
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| 292 | }
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| 293 | onChunk(
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| 294 | chunk,
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| 295 | generatedLine,
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| 296 | generatedColumn,
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| 297 | finalSourceIndex,
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| 298 | originalLine,
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| 299 | originalColumn,
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| 300 | finalNameIndex,
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| 301 | );
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| 302 | }
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| 303 | },
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| 304 | (i, source, sourceContent) => {
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| 305 | if (source === innerSourceName) {
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| 306 | outerSourceIndex = i;
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| 307 | if (innerSource !== undefined) sourceContent = innerSource;
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| 308 | else innerSource = /** @type {string} */ (sourceContent);
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| 309 | sourceIndexMapping[i] = -2;
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| 310 | streamChunksOfSourceMap(
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| 311 | /** @type {string} */
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| 312 | (sourceContent),
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| 313 | innerSourceMap,
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| 314 | (
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| 315 | chunk,
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| 316 | generatedLine,
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| 317 | generatedColumn,
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| 318 | sourceIndex,
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| 319 | originalLine,
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| 320 | originalColumn,
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| 321 | nameIndex,
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| 322 | ) => {
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| 323 | while (innerSourceMapLineData.length < generatedLine) {
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| 324 | innerSourceMapLineData.push({
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| 325 | mappingsData: [],
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| 326 | chunks: [],
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| 327 | });
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| 328 | }
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| 329 | const data = innerSourceMapLineData[generatedLine - 1];
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| 330 | data.mappingsData.push(
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| 331 | generatedColumn,
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| 332 | sourceIndex,
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| 333 | originalLine,
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| 334 | originalColumn,
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| 335 | nameIndex,
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| 336 | );
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| 337 | data.chunks.push(/** @type {string} */ (chunk));
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| 338 | },
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| 339 | (i, source, sourceContent) => {
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| 340 | innerSourceContents[i] = sourceContent;
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| 341 | innerSourceContentLines[i] = undefined;
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| 342 | innerSourceIndexMapping[i] = -2;
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| 343 | innerSourceIndexValueMapping[i] = [source, sourceContent];
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| 344 | },
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| 345 | (i, name) => {
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| 346 | innerNameIndexMapping[i] = -2;
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| 347 | innerNameIndexValueMapping[i] = name;
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| 348 | },
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| 349 | false,
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| 350 | columns,
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| 351 | );
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| 352 | } else {
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| 353 | let globalIndex = sourceMapping.get(source);
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| 354 | if (globalIndex === undefined) {
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| 355 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 356 | onSource(globalIndex, source, sourceContent);
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| 357 | }
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| 358 | sourceIndexMapping[i] = globalIndex;
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| 359 | }
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| 360 | },
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| 361 | (i, name) => {
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| 362 | nameIndexMapping[i] = -2;
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| 363 | nameIndexValueMapping[i] = name;
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| 364 | },
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| 365 | finalSource,
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| 366 | columns,
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| 367 | );
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| 368 | };
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| 369 |
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| 370 | module.exports = streamChunksOfCombinedSourceMap;
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