42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
import { COLUMN, SOURCES_INDEX, SOURCE_LINE, SOURCE_COLUMN } from './sourcemap-segment';
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import { sortComparator } from './sort';
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import type { ReverseSegment, SourceMapSegment } from './sourcemap-segment';
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export type Source = ReverseSegment[][];
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// Rebuilds the original source files, with mappings that are ordered by source line/column instead
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// of generated line/column.
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export default function buildBySources(
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decoded: readonly SourceMapSegment[][],
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memos: unknown[],
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): Source[] {
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const sources: Source[] = memos.map(() => []);
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for (let i = 0; i < decoded.length; i++) {
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const line = decoded[i];
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for (let j = 0; j < line.length; j++) {
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const seg = line[j];
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if (seg.length === 1) continue;
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const sourceIndex = seg[SOURCES_INDEX];
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const sourceLine = seg[SOURCE_LINE];
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const sourceColumn = seg[SOURCE_COLUMN];
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const source = sources[sourceIndex];
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const segs = (source[sourceLine] ||= []);
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segs.push([sourceColumn, i, seg[COLUMN]]);
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}
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}
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for (let i = 0; i < sources.length; i++) {
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const source = sources[i];
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for (let j = 0; j < source.length; j++) {
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const line = source[j];
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if (line) line.sort(sortComparator);
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}
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}
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return sources;
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}
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