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							553 lines
						
					
					
						
							21 KiB
						
					
					
				import { encode, decode } from '@jridgewell/sourcemap-codec';
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import resolveUri from '@jridgewell/resolve-uri';
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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(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 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 = 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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let encodedMappings;
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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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let decodedMappings;
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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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let traceSegment;
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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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let originalPositionFor;
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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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let generatedPositionFor;
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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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let allGeneratedPositionsFor;
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/**
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 * Iterates each mapping in generated position order.
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 */
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let eachMapping;
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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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let sourceContentFor;
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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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let presortedDecodedMap;
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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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let decodedMap;
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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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let encodedMap;
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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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    encodedMappings = (map) => {
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        var _a;
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        return ((_a = map._encoded) !== null && _a !== void 0 ? _a : (map._encoded = encode(map._decoded)));
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    };
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    decodedMappings = (map) => {
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        return (map._decoded || (map._decoded = decode(map._encoded)));
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    };
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    traceSegment = (map, line, column) => {
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						|
        const decoded = 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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    originalPositionFor = (map, { line, column, bias }) => {
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        line--;
 | 
						|
        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);
 | 
						|
        const decoded = decodedMappings(map);
 | 
						|
        // It's common for parent source maps to have pointers to lines that have no
 | 
						|
        // 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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						|
    allGeneratedPositionsFor = (map, { source, line, column, bias }) => {
 | 
						|
        // SourceMapConsumer uses LEAST_UPPER_BOUND for some reason, so we follow suit.
 | 
						|
        return generatedPosition(map, source, line, column, bias || LEAST_UPPER_BOUND, true);
 | 
						|
    };
 | 
						|
    generatedPositionFor = (map, { source, line, column, bias }) => {
 | 
						|
        return generatedPosition(map, source, line, column, bias || GREATEST_LOWER_BOUND, false);
 | 
						|
    };
 | 
						|
    eachMapping = (map, cb) => {
 | 
						|
        const decoded = decodedMappings(map);
 | 
						|
        const { names, resolvedSources } = map;
 | 
						|
        for (let i = 0; i < decoded.length; i++) {
 | 
						|
            const line = decoded[i];
 | 
						|
            for (let j = 0; j < line.length; j++) {
 | 
						|
                const seg = line[j];
 | 
						|
                const generatedLine = i + 1;
 | 
						|
                const generatedColumn = seg[0];
 | 
						|
                let source = null;
 | 
						|
                let originalLine = null;
 | 
						|
                let originalColumn = null;
 | 
						|
                let name = null;
 | 
						|
                if (seg.length !== 1) {
 | 
						|
                    source = resolvedSources[seg[1]];
 | 
						|
                    originalLine = seg[2] + 1;
 | 
						|
                    originalColumn = seg[3];
 | 
						|
                }
 | 
						|
                if (seg.length === 5)
 | 
						|
                    name = names[seg[4]];
 | 
						|
                cb({
 | 
						|
                    generatedLine,
 | 
						|
                    generatedColumn,
 | 
						|
                    source,
 | 
						|
                    originalLine,
 | 
						|
                    originalColumn,
 | 
						|
                    name,
 | 
						|
                });
 | 
						|
            }
 | 
						|
        }
 | 
						|
    };
 | 
						|
    sourceContentFor = (map, source) => {
 | 
						|
        const { sources, resolvedSources, sourcesContent } = map;
 | 
						|
        if (sourcesContent == null)
 | 
						|
            return null;
 | 
						|
        let index = sources.indexOf(source);
 | 
						|
        if (index === -1)
 | 
						|
            index = resolvedSources.indexOf(source);
 | 
						|
        return index === -1 ? null : sourcesContent[index];
 | 
						|
    };
 | 
						|
    presortedDecodedMap = (map, mapUrl) => {
 | 
						|
        const tracer = new TraceMap(clone(map, []), mapUrl);
 | 
						|
        tracer._decoded = map.mappings;
 | 
						|
        return tracer;
 | 
						|
    };
 | 
						|
    decodedMap = (map) => {
 | 
						|
        return clone(map, decodedMappings(map));
 | 
						|
    };
 | 
						|
    encodedMap = (map) => {
 | 
						|
        return clone(map, 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(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;
 | 
						|
}
 | 
						|
 | 
						|
export { AnyMap, GREATEST_LOWER_BOUND, LEAST_UPPER_BOUND, TraceMap, allGeneratedPositionsFor, decodedMap, decodedMappings, eachMapping, encodedMap, encodedMappings, generatedPositionFor, originalPositionFor, presortedDecodedMap, sourceContentFor, traceSegment };
 | 
						|
//# sourceMappingURL=trace-mapping.mjs.map
 |