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567 lines
24 KiB
567 lines
24 KiB
(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@jridgewell/sourcemap-codec'), require('@jridgewell/resolve-uri')) :
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typeof define === 'function' && define.amd ? define(['exports', '@jridgewell/sourcemap-codec', '@jridgewell/resolve-uri'], factory) :
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(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.traceMapping = {}, global.sourcemapCodec, global.resolveURI));
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})(this, (function (exports, sourcemapCodec, resolveUri) { 'use strict';
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
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var resolveUri__default = /*#__PURE__*/_interopDefaultLegacy(resolveUri);
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function resolve(input, base) {
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// The base is always treated as a directory, if it's not empty.
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// https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327
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// https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401
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if (base && !base.endsWith('/'))
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base += '/';
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return resolveUri__default["default"](input, base);
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}
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/**
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* Removes everything after the last "/", but leaves the slash.
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*/
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function stripFilename(path) {
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if (!path)
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return '';
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const index = path.lastIndexOf('/');
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return path.slice(0, index + 1);
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}
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const COLUMN = 0;
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const SOURCES_INDEX = 1;
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const SOURCE_LINE = 2;
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const SOURCE_COLUMN = 3;
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const NAMES_INDEX = 4;
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const REV_GENERATED_LINE = 1;
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const REV_GENERATED_COLUMN = 2;
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function maybeSort(mappings, owned) {
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const unsortedIndex = nextUnsortedSegmentLine(mappings, 0);
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if (unsortedIndex === mappings.length)
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return mappings;
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// If we own the array (meaning we parsed it from JSON), then we're free to directly mutate it. If
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// not, we do not want to modify the consumer's input array.
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if (!owned)
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mappings = mappings.slice();
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for (let i = unsortedIndex; i < mappings.length; i = nextUnsortedSegmentLine(mappings, i + 1)) {
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mappings[i] = sortSegments(mappings[i], owned);
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}
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return mappings;
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}
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function nextUnsortedSegmentLine(mappings, start) {
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for (let i = start; i < mappings.length; i++) {
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if (!isSorted(mappings[i]))
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return i;
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}
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return mappings.length;
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}
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function isSorted(line) {
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for (let j = 1; j < line.length; j++) {
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if (line[j][COLUMN] < line[j - 1][COLUMN]) {
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return false;
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}
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}
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return true;
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}
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function sortSegments(line, owned) {
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if (!owned)
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line = line.slice();
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return line.sort(sortComparator);
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}
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function sortComparator(a, b) {
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return a[COLUMN] - b[COLUMN];
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}
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let found = false;
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/**
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* A binary search implementation that returns the index if a match is found.
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* If no match is found, then the left-index (the index associated with the item that comes just
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* before the desired index) is returned. To maintain proper sort order, a splice would happen at
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* the next index:
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*
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* ```js
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* const array = [1, 3];
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* const needle = 2;
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* const index = binarySearch(array, needle, (item, needle) => item - needle);
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*
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* assert.equal(index, 0);
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* array.splice(index + 1, 0, needle);
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* assert.deepEqual(array, [1, 2, 3]);
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* ```
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*/
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function binarySearch(haystack, needle, low, high) {
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while (low <= high) {
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const mid = low + ((high - low) >> 1);
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const cmp = haystack[mid][COLUMN] - needle;
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if (cmp === 0) {
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found = true;
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return mid;
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}
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if (cmp < 0) {
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low = mid + 1;
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}
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else {
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high = mid - 1;
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}
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}
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found = false;
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return low - 1;
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}
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function upperBound(haystack, needle, index) {
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for (let i = index + 1; i < haystack.length; index = i++) {
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if (haystack[i][COLUMN] !== needle)
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break;
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}
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return index;
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}
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function lowerBound(haystack, needle, index) {
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for (let i = index - 1; i >= 0; index = i--) {
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if (haystack[i][COLUMN] !== needle)
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break;
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}
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return index;
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}
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function memoizedState() {
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return {
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lastKey: -1,
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lastNeedle: -1,
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lastIndex: -1,
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};
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}
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/**
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* This overly complicated beast is just to record the last tested line/column and the resulting
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* index, allowing us to skip a few tests if mappings are monotonically increasing.
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*/
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function memoizedBinarySearch(haystack, needle, state, key) {
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const { lastKey, lastNeedle, lastIndex } = state;
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let low = 0;
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let high = haystack.length - 1;
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if (key === lastKey) {
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if (needle === lastNeedle) {
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found = lastIndex !== -1 && haystack[lastIndex][COLUMN] === needle;
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return lastIndex;
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}
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if (needle >= lastNeedle) {
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// lastIndex may be -1 if the previous needle was not found.
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low = lastIndex === -1 ? 0 : lastIndex;
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}
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else {
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high = lastIndex;
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}
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}
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state.lastKey = key;
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state.lastNeedle = needle;
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return (state.lastIndex = binarySearch(haystack, needle, low, high));
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}
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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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function buildBySources(decoded, memos) {
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const sources = memos.map(buildNullArray);
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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)
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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 originalSource = sources[sourceIndex];
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const originalLine = (originalSource[sourceLine] || (originalSource[sourceLine] = []));
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const memo = memos[sourceIndex];
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// The binary search either found a match, or it found the left-index just before where the
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// segment should go. Either way, we want to insert after that. And there may be multiple
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// generated segments associated with an original location, so there may need to move several
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// indexes before we find where we need to insert.
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const index = upperBound(originalLine, sourceColumn, memoizedBinarySearch(originalLine, sourceColumn, memo, sourceLine));
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insert(originalLine, (memo.lastIndex = index + 1), [sourceColumn, i, seg[COLUMN]]);
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}
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}
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return sources;
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}
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function insert(array, index, value) {
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for (let i = array.length; i > index; i--) {
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array[i] = array[i - 1];
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}
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array[index] = value;
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}
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// Null arrays allow us to use ordered index keys without actually allocating contiguous memory like
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// a real array. We use a null-prototype object to avoid prototype pollution and deoptimizations.
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// Numeric properties on objects are magically sorted in ascending order by the engine regardless of
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// the insertion order. So, by setting any numeric keys, even out of order, we'll get ascending
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// order when iterating with for-in.
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function buildNullArray() {
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return { __proto__: null };
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}
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const AnyMap = function (map, mapUrl) {
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const parsed = typeof map === 'string' ? JSON.parse(map) : map;
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if (!('sections' in parsed))
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return new TraceMap(parsed, mapUrl);
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const mappings = [];
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const sources = [];
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const sourcesContent = [];
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const names = [];
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recurse(parsed, mapUrl, mappings, sources, sourcesContent, names, 0, 0, Infinity, Infinity);
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const joined = {
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version: 3,
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file: parsed.file,
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names,
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sources,
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sourcesContent,
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mappings,
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};
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return exports.presortedDecodedMap(joined);
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};
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function recurse(input, mapUrl, mappings, sources, sourcesContent, names, lineOffset, columnOffset, stopLine, stopColumn) {
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const { sections } = input;
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for (let i = 0; i < sections.length; i++) {
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const { map, offset } = sections[i];
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let sl = stopLine;
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let sc = stopColumn;
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if (i + 1 < sections.length) {
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const nextOffset = sections[i + 1].offset;
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sl = Math.min(stopLine, lineOffset + nextOffset.line);
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if (sl === stopLine) {
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sc = Math.min(stopColumn, columnOffset + nextOffset.column);
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}
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else if (sl < stopLine) {
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sc = columnOffset + nextOffset.column;
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}
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}
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addSection(map, mapUrl, mappings, sources, sourcesContent, names, lineOffset + offset.line, columnOffset + offset.column, sl, sc);
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}
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}
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function addSection(input, mapUrl, mappings, sources, sourcesContent, names, lineOffset, columnOffset, stopLine, stopColumn) {
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if ('sections' in input)
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return recurse(...arguments);
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const map = new TraceMap(input, mapUrl);
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const sourcesOffset = sources.length;
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const namesOffset = names.length;
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const decoded = exports.decodedMappings(map);
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const { resolvedSources, sourcesContent: contents } = map;
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append(sources, resolvedSources);
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append(names, map.names);
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if (contents)
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append(sourcesContent, contents);
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else
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for (let i = 0; i < resolvedSources.length; i++)
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sourcesContent.push(null);
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for (let i = 0; i < decoded.length; i++) {
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const lineI = lineOffset + i;
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// We can only add so many lines before we step into the range that the next section's map
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// controls. When we get to the last line, then we'll start checking the segments to see if
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// they've crossed into the column range. But it may not have any columns that overstep, so we
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// still need to check that we don't overstep lines, too.
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if (lineI > stopLine)
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return;
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// The out line may already exist in mappings (if we're continuing the line started by a
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// previous section). Or, we may have jumped ahead several lines to start this section.
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const out = getLine(mappings, lineI);
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// On the 0th loop, the section's column offset shifts us forward. On all other lines (since the
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// map can be multiple lines), it doesn't.
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const cOffset = i === 0 ? columnOffset : 0;
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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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const column = cOffset + seg[COLUMN];
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// If this segment steps into the column range that the next section's map controls, we need
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// to stop early.
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if (lineI === stopLine && column >= stopColumn)
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return;
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if (seg.length === 1) {
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out.push([column]);
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continue;
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}
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const sourcesIndex = sourcesOffset + 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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out.push(seg.length === 4
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? [column, sourcesIndex, sourceLine, sourceColumn]
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: [column, sourcesIndex, sourceLine, sourceColumn, namesOffset + seg[NAMES_INDEX]]);
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}
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}
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}
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function append(arr, other) {
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for (let i = 0; i < other.length; i++)
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arr.push(other[i]);
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}
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function getLine(arr, index) {
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for (let i = arr.length; i <= index; i++)
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arr[i] = [];
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return arr[index];
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}
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const LINE_GTR_ZERO = '`line` must be greater than 0 (lines start at line 1)';
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const COL_GTR_EQ_ZERO = '`column` must be greater than or equal to 0 (columns start at column 0)';
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const LEAST_UPPER_BOUND = -1;
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const GREATEST_LOWER_BOUND = 1;
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/**
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* Returns the encoded (VLQ string) form of the SourceMap's mappings field.
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*/
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exports.encodedMappings = void 0;
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/**
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* Returns the decoded (array of lines of segments) form of the SourceMap's mappings field.
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*/
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exports.decodedMappings = void 0;
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/**
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* A low-level API to find the segment associated with a generated line/column (think, from a
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* stack trace). Line and column here are 0-based, unlike `originalPositionFor`.
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*/
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exports.traceSegment = void 0;
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/**
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* A higher-level API to find the source/line/column associated with a generated line/column
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* (think, from a stack trace). Line is 1-based, but column is 0-based, due to legacy behavior in
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* `source-map` library.
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*/
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exports.originalPositionFor = void 0;
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/**
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* Finds the generated line/column position of the provided source/line/column source position.
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*/
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exports.generatedPositionFor = void 0;
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/**
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* Finds all generated line/column positions of the provided source/line/column source position.
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*/
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exports.allGeneratedPositionsFor = void 0;
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/**
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* Iterates each mapping in generated position order.
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*/
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exports.eachMapping = void 0;
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/**
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* Retrieves the source content for a particular source, if its found. Returns null if not.
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*/
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exports.sourceContentFor = void 0;
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/**
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* A helper that skips sorting of the input map's mappings array, which can be expensive for larger
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* maps.
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*/
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exports.presortedDecodedMap = void 0;
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/**
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* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects
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* a sourcemap, or to JSON.stringify.
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*/
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exports.decodedMap = void 0;
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/**
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* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects
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* a sourcemap, or to JSON.stringify.
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*/
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exports.encodedMap = void 0;
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class TraceMap {
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constructor(map, mapUrl) {
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const isString = typeof map === 'string';
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if (!isString && map._decodedMemo)
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return map;
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const parsed = (isString ? JSON.parse(map) : map);
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const { version, file, names, sourceRoot, sources, sourcesContent } = parsed;
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this.version = version;
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this.file = file;
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this.names = names;
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this.sourceRoot = sourceRoot;
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this.sources = sources;
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this.sourcesContent = sourcesContent;
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const from = resolve(sourceRoot || '', stripFilename(mapUrl));
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this.resolvedSources = sources.map((s) => resolve(s || '', from));
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const { mappings } = parsed;
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if (typeof mappings === 'string') {
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this._encoded = mappings;
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this._decoded = undefined;
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}
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else {
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this._encoded = undefined;
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this._decoded = maybeSort(mappings, isString);
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}
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this._decodedMemo = memoizedState();
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this._bySources = undefined;
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this._bySourceMemos = undefined;
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}
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}
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(() => {
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exports.encodedMappings = (map) => {
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var _a;
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return ((_a = map._encoded) !== null && _a !== void 0 ? _a : (map._encoded = sourcemapCodec.encode(map._decoded)));
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};
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exports.decodedMappings = (map) => {
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return (map._decoded || (map._decoded = sourcemapCodec.decode(map._encoded)));
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};
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exports.traceSegment = (map, line, column) => {
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const decoded = exports.decodedMappings(map);
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// It's common for parent source maps to have pointers to lines that have no
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// mapping (like a "//# sourceMappingURL=") at the end of the child file.
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if (line >= decoded.length)
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return null;
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const segments = decoded[line];
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const index = traceSegmentInternal(segments, map._decodedMemo, line, column, GREATEST_LOWER_BOUND);
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return index === -1 ? null : segments[index];
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};
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exports.originalPositionFor = (map, { line, column, bias }) => {
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line--;
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if (line < 0)
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throw new Error(LINE_GTR_ZERO);
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if (column < 0)
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throw new Error(COL_GTR_EQ_ZERO);
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const decoded = exports.decodedMappings(map);
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// It's common for parent source maps to have pointers to lines that have no
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// mapping (like a "//# sourceMappingURL=") at the end of the child file.
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if (line >= decoded.length)
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return OMapping(null, null, null, null);
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const segments = decoded[line];
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const index = traceSegmentInternal(segments, map._decodedMemo, line, column, bias || GREATEST_LOWER_BOUND);
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if (index === -1)
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return OMapping(null, null, null, null);
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const segment = segments[index];
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if (segment.length === 1)
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return OMapping(null, null, null, null);
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const { names, resolvedSources } = map;
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return OMapping(resolvedSources[segment[SOURCES_INDEX]], segment[SOURCE_LINE] + 1, segment[SOURCE_COLUMN], segment.length === 5 ? names[segment[NAMES_INDEX]] : null);
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};
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exports.allGeneratedPositionsFor = (map, { source, line, column, bias }) => {
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// SourceMapConsumer uses LEAST_UPPER_BOUND for some reason, so we follow suit.
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return generatedPosition(map, source, line, column, bias || LEAST_UPPER_BOUND, true);
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};
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exports.generatedPositionFor = (map, { source, line, column, bias }) => {
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return generatedPosition(map, source, line, column, bias || GREATEST_LOWER_BOUND, false);
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};
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exports.eachMapping = (map, cb) => {
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const decoded = exports.decodedMappings(map);
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const { names, resolvedSources } = 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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const generatedLine = i + 1;
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const generatedColumn = seg[0];
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let source = null;
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let originalLine = null;
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let originalColumn = null;
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let name = null;
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if (seg.length !== 1) {
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source = resolvedSources[seg[1]];
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originalLine = seg[2] + 1;
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originalColumn = seg[3];
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}
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if (seg.length === 5)
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name = names[seg[4]];
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cb({
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generatedLine,
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generatedColumn,
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source,
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originalLine,
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originalColumn,
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name,
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});
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}
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}
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};
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exports.sourceContentFor = (map, source) => {
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const { sources, resolvedSources, sourcesContent } = map;
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if (sourcesContent == null)
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return null;
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let index = sources.indexOf(source);
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if (index === -1)
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index = resolvedSources.indexOf(source);
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return index === -1 ? null : sourcesContent[index];
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};
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exports.presortedDecodedMap = (map, mapUrl) => {
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const tracer = new TraceMap(clone(map, []), mapUrl);
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tracer._decoded = map.mappings;
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return tracer;
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|
};
|
|
exports.decodedMap = (map) => {
|
|
return clone(map, exports.decodedMappings(map));
|
|
};
|
|
exports.encodedMap = (map) => {
|
|
return clone(map, exports.encodedMappings(map));
|
|
};
|
|
function generatedPosition(map, source, line, column, bias, all) {
|
|
line--;
|
|
if (line < 0)
|
|
throw new Error(LINE_GTR_ZERO);
|
|
if (column < 0)
|
|
throw new Error(COL_GTR_EQ_ZERO);
|
|
const { sources, resolvedSources } = map;
|
|
let sourceIndex = sources.indexOf(source);
|
|
if (sourceIndex === -1)
|
|
sourceIndex = resolvedSources.indexOf(source);
|
|
if (sourceIndex === -1)
|
|
return all ? [] : GMapping(null, null);
|
|
const generated = (map._bySources || (map._bySources = buildBySources(exports.decodedMappings(map), (map._bySourceMemos = sources.map(memoizedState)))));
|
|
const segments = generated[sourceIndex][line];
|
|
if (segments == null)
|
|
return all ? [] : GMapping(null, null);
|
|
const memo = map._bySourceMemos[sourceIndex];
|
|
if (all)
|
|
return sliceGeneratedPositions(segments, memo, line, column, bias);
|
|
const index = traceSegmentInternal(segments, memo, line, column, bias);
|
|
if (index === -1)
|
|
return GMapping(null, null);
|
|
const segment = segments[index];
|
|
return GMapping(segment[REV_GENERATED_LINE] + 1, segment[REV_GENERATED_COLUMN]);
|
|
}
|
|
})();
|
|
function clone(map, mappings) {
|
|
return {
|
|
version: map.version,
|
|
file: map.file,
|
|
names: map.names,
|
|
sourceRoot: map.sourceRoot,
|
|
sources: map.sources,
|
|
sourcesContent: map.sourcesContent,
|
|
mappings,
|
|
};
|
|
}
|
|
function OMapping(source, line, column, name) {
|
|
return { source, line, column, name };
|
|
}
|
|
function GMapping(line, column) {
|
|
return { line, column };
|
|
}
|
|
function traceSegmentInternal(segments, memo, line, column, bias) {
|
|
let index = memoizedBinarySearch(segments, column, memo, line);
|
|
if (found) {
|
|
index = (bias === LEAST_UPPER_BOUND ? upperBound : lowerBound)(segments, column, index);
|
|
}
|
|
else if (bias === LEAST_UPPER_BOUND)
|
|
index++;
|
|
if (index === -1 || index === segments.length)
|
|
return -1;
|
|
return index;
|
|
}
|
|
function sliceGeneratedPositions(segments, memo, line, column, bias) {
|
|
let min = traceSegmentInternal(segments, memo, line, column, GREATEST_LOWER_BOUND);
|
|
// We ignored the bias when tracing the segment so that we're guarnateed to find the first (in
|
|
// insertion order) segment that matched. Even if we did respect the bias when tracing, we would
|
|
// still need to call `lowerBound()` to find the first segment, which is slower than just looking
|
|
// for the GREATEST_LOWER_BOUND to begin with. The only difference that matters for us is when the
|
|
// binary search didn't match, in which case GREATEST_LOWER_BOUND just needs to increment to
|
|
// match LEAST_UPPER_BOUND.
|
|
if (!found && bias === LEAST_UPPER_BOUND)
|
|
min++;
|
|
if (min === -1 || min === segments.length)
|
|
return [];
|
|
// We may have found the segment that started at an earlier column. If this is the case, then we
|
|
// need to slice all generated segments that match _that_ column, because all such segments span
|
|
// to our desired column.
|
|
const matchedColumn = found ? column : segments[min][COLUMN];
|
|
// The binary search is not guaranteed to find the lower bound when a match wasn't found.
|
|
if (!found)
|
|
min = lowerBound(segments, matchedColumn, min);
|
|
const max = upperBound(segments, matchedColumn, min);
|
|
const result = [];
|
|
for (; min <= max; min++) {
|
|
const segment = segments[min];
|
|
result.push(GMapping(segment[REV_GENERATED_LINE] + 1, segment[REV_GENERATED_COLUMN]));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
exports.AnyMap = AnyMap;
|
|
exports.GREATEST_LOWER_BOUND = GREATEST_LOWER_BOUND;
|
|
exports.LEAST_UPPER_BOUND = LEAST_UPPER_BOUND;
|
|
exports.TraceMap = TraceMap;
|
|
|
|
Object.defineProperty(exports, '__esModule', { value: true });
|
|
|
|
}));
|
|
//# sourceMappingURL=trace-mapping.umd.js.map
|