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Just calculate the result at the end of commitPendingMapping.

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Daniel Rosenwasser 2021-04-23 02:54:06 +00:00 committed by GitHub
parent 312ce16e0f
commit 799bbbeca6
1 changed files with 13 additions and 9 deletions
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22
src/compiler/sourcemap.ts
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@ -17,7 +17,8 @@ namespace ts {
const names: string[] = [];
let nameToNameIndexMap: ESMap<string, number> | undefined;
let mappings: string[] = [];
let mappings = "";
let mappingSegmentsBuffer: string[] = [];
// Last recorded and encoded mappings
let lastGeneratedLine = 0;
@ -221,7 +222,7 @@ namespace ts {
if (lastGeneratedLine < pendingGeneratedLine) {
// Emit line delimiters
do {
mappings.push(";");
mappingSegmentsBuffer.push(";");
lastGeneratedLine++;
lastGeneratedCharacter = 0;
}
@ -231,34 +232,37 @@ namespace ts {
Debug.assertEqual(lastGeneratedLine, pendingGeneratedLine, "generatedLine cannot backtrack");
// Emit comma to separate the entry
if (hasLast) {
mappings.push(",");
mappingSegmentsBuffer.push(",");
}
}
// 1. Relative generated character
mappings.push(base64VLQFormatEncode(pendingGeneratedCharacter - lastGeneratedCharacter));
mappingSegmentsBuffer.push(base64VLQFormatEncode(pendingGeneratedCharacter - lastGeneratedCharacter));
lastGeneratedCharacter = pendingGeneratedCharacter;
if (hasPendingSource) {
// 2. Relative sourceIndex
mappings.push(base64VLQFormatEncode(pendingSourceIndex - lastSourceIndex));
mappingSegmentsBuffer.push(base64VLQFormatEncode(pendingSourceIndex - lastSourceIndex));
lastSourceIndex = pendingSourceIndex;
// 3. Relative source line
mappings.push(base64VLQFormatEncode(pendingSourceLine - lastSourceLine));
mappingSegmentsBuffer.push(base64VLQFormatEncode(pendingSourceLine - lastSourceLine));
lastSourceLine = pendingSourceLine;
// 4. Relative source character
mappings.push(base64VLQFormatEncode(pendingSourceCharacter - lastSourceCharacter));
mappingSegmentsBuffer.push(base64VLQFormatEncode(pendingSourceCharacter - lastSourceCharacter));
lastSourceCharacter = pendingSourceCharacter;
if (hasPendingName) {
// 5. Relative nameIndex
mappings.push(base64VLQFormatEncode(pendingNameIndex - lastNameIndex));
mappingSegmentsBuffer.push(base64VLQFormatEncode(pendingNameIndex - lastNameIndex));
lastNameIndex = pendingNameIndex;
}
}
mappings = mappingSegmentsBuffer.join("");
mappingSegmentsBuffer.length = 1;
mappingSegmentsBuffer[0] = mappings;
hasLast = true;
exit();
}
@ -271,7 +275,7 @@ namespace ts {
sourceRoot,
sources,
names,
mappings: mappings.join(""),
mappings,
sourcesContent,
};
}