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532 lines
22 KiB
532 lines
22 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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|
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; } |
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|
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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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/** |
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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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|
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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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|
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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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|
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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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|
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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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|
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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 source/line/column directly after the mapping returned by originalPositionFor, provided |
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* the found mapping is from the same source and line as the originalPositionFor mapping. |
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* |
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* Eg, in the code `let id = 1`, `originalPositionAfter` could find the mapping associated with `1` |
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* using the same needle that would return `id` when calling `originalPositionFor`. |
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*/ |
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exports.generatedPositionFor = 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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this._decodedMemo = memoizedState(); |
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this._bySources = undefined; |
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this._bySourceMemos = undefined; |
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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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} |
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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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return traceSegmentInternal(decoded[line], map._decodedMemo, line, column, GREATEST_LOWER_BOUND); |
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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 segment = traceSegmentInternal(decoded[line], map._decodedMemo, line, column, bias || GREATEST_LOWER_BOUND); |
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if (segment == null) |
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return OMapping(null, null, null, null); |
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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.generatedPositionFor = (map, { source, 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 { sources, resolvedSources } = map; |
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let sourceIndex = sources.indexOf(source); |
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if (sourceIndex === -1) |
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sourceIndex = resolvedSources.indexOf(source); |
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if (sourceIndex === -1) |
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return GMapping(null, null); |
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const generated = (map._bySources || (map._bySources = buildBySources(exports.decodedMappings(map), (map._bySourceMemos = sources.map(memoizedState))))); |
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const memos = map._bySourceMemos; |
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const segments = generated[sourceIndex][line]; |
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if (segments == null) |
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return GMapping(null, null); |
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const segment = traceSegmentInternal(segments, memos[sourceIndex], line, column, bias || GREATEST_LOWER_BOUND); |
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if (segment == null) |
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return GMapping(null, null); |
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return GMapping(segment[REV_GENERATED_LINE] + 1, segment[REV_GENERATED_COLUMN]); |
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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 clone = Object.assign({}, map); |
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clone.mappings = []; |
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const tracer = new TraceMap(clone, mapUrl); |
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tracer._decoded = map.mappings; |
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return tracer; |
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}; |
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exports.decodedMap = (map) => { |
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return { |
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version: 3, |
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file: map.file, |
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names: map.names, |
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sourceRoot: map.sourceRoot, |
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sources: map.sources, |
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sourcesContent: map.sourcesContent, |
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mappings: exports.decodedMappings(map), |
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}; |
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}; |
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exports.encodedMap = (map) => { |
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return { |
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version: 3, |
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file: map.file, |
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names: map.names, |
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sourceRoot: map.sourceRoot, |
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sources: map.sources, |
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sourcesContent: map.sourcesContent, |
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mappings: exports.encodedMappings(map), |
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}; |
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}; |
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})(); |
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function OMapping(source, line, column, name) { |
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return { source, line, column, name }; |
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} |
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function GMapping(line, column) { |
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return { line, column }; |
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} |
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function traceSegmentInternal(segments, memo, line, column, bias) { |
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let index = memoizedBinarySearch(segments, column, memo, line); |
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if (found) { |
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index = (bias === LEAST_UPPER_BOUND ? upperBound : lowerBound)(segments, column, index); |
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} |
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else if (bias === LEAST_UPPER_BOUND) |
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index++; |
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if (index === -1 || index === segments.length) |
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return null; |
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return segments[index]; |
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} |
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|
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exports.AnyMap = AnyMap; |
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exports.GREATEST_LOWER_BOUND = GREATEST_LOWER_BOUND; |
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exports.LEAST_UPPER_BOUND = LEAST_UPPER_BOUND; |
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exports.TraceMap = TraceMap; |
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|
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Object.defineProperty(exports, '__esModule', { value: true }); |
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|
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})); |
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//# sourceMappingURL=trace-mapping.umd.js.map
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