You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
939 lines
36 KiB
939 lines
36 KiB
(function (global, factory) { |
|
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : |
|
typeof define === 'function' && define.amd ? define(['exports'], factory) : |
|
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.sourceMap = {})); |
|
})(this, (function (exports) { 'use strict'; |
|
|
|
const comma = ','.charCodeAt(0); |
|
const semicolon = ';'.charCodeAt(0); |
|
const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; |
|
const intToChar = new Uint8Array(64); // 64 possible chars. |
|
const charToInteger = new Uint8Array(128); // z is 122 in ASCII |
|
for (let i = 0; i < chars.length; i++) { |
|
const c = chars.charCodeAt(i); |
|
charToInteger[c] = i; |
|
intToChar[i] = c; |
|
} |
|
// Provide a fallback for older environments. |
|
const td = typeof TextDecoder !== 'undefined' |
|
? new TextDecoder() |
|
: typeof Buffer !== 'undefined' |
|
? { |
|
decode(buf) { |
|
const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength); |
|
return out.toString(); |
|
}, |
|
} |
|
: { |
|
decode(buf) { |
|
let out = ''; |
|
for (let i = 0; i < buf.length; i++) { |
|
out += String.fromCharCode(buf[i]); |
|
} |
|
return out; |
|
}, |
|
}; |
|
function decode(mappings) { |
|
const state = new Int32Array(5); |
|
const decoded = []; |
|
let line = []; |
|
let sorted = true; |
|
let lastCol = 0; |
|
for (let i = 0; i < mappings.length;) { |
|
const c = mappings.charCodeAt(i); |
|
if (c === comma) { |
|
i++; |
|
} |
|
else if (c === semicolon) { |
|
state[0] = lastCol = 0; |
|
if (!sorted) |
|
sort(line); |
|
sorted = true; |
|
decoded.push(line); |
|
line = []; |
|
i++; |
|
} |
|
else { |
|
i = decodeInteger(mappings, i, state, 0); // generatedCodeColumn |
|
const col = state[0]; |
|
if (col < lastCol) |
|
sorted = false; |
|
lastCol = col; |
|
if (!hasMoreSegments(mappings, i)) { |
|
line.push([col]); |
|
continue; |
|
} |
|
i = decodeInteger(mappings, i, state, 1); // sourceFileIndex |
|
i = decodeInteger(mappings, i, state, 2); // sourceCodeLine |
|
i = decodeInteger(mappings, i, state, 3); // sourceCodeColumn |
|
if (!hasMoreSegments(mappings, i)) { |
|
line.push([col, state[1], state[2], state[3]]); |
|
continue; |
|
} |
|
i = decodeInteger(mappings, i, state, 4); // nameIndex |
|
line.push([col, state[1], state[2], state[3], state[4]]); |
|
} |
|
} |
|
if (!sorted) |
|
sort(line); |
|
decoded.push(line); |
|
return decoded; |
|
} |
|
function decodeInteger(mappings, pos, state, j) { |
|
let value = 0; |
|
let shift = 0; |
|
let integer = 0; |
|
do { |
|
const c = mappings.charCodeAt(pos++); |
|
integer = charToInteger[c]; |
|
value |= (integer & 31) << shift; |
|
shift += 5; |
|
} while (integer & 32); |
|
const shouldNegate = value & 1; |
|
value >>>= 1; |
|
if (shouldNegate) { |
|
value = -0x80000000 | -value; |
|
} |
|
state[j] += value; |
|
return pos; |
|
} |
|
function hasMoreSegments(mappings, i) { |
|
if (i >= mappings.length) |
|
return false; |
|
const c = mappings.charCodeAt(i); |
|
if (c === comma || c === semicolon) |
|
return false; |
|
return true; |
|
} |
|
function sort(line) { |
|
line.sort(sortComparator$1); |
|
} |
|
function sortComparator$1(a, b) { |
|
return a[0] - b[0]; |
|
} |
|
function encode(decoded) { |
|
const state = new Int32Array(5); |
|
let buf = new Uint8Array(1024); |
|
let pos = 0; |
|
for (let i = 0; i < decoded.length; i++) { |
|
const line = decoded[i]; |
|
if (i > 0) { |
|
buf = reserve(buf, pos, 1); |
|
buf[pos++] = semicolon; |
|
} |
|
if (line.length === 0) |
|
continue; |
|
state[0] = 0; |
|
for (let j = 0; j < line.length; j++) { |
|
const segment = line[j]; |
|
// We can push up to 5 ints, each int can take at most 7 chars, and we |
|
// may push a comma. |
|
buf = reserve(buf, pos, 36); |
|
if (j > 0) |
|
buf[pos++] = comma; |
|
pos = encodeInteger(buf, pos, state, segment, 0); // generatedCodeColumn |
|
if (segment.length === 1) |
|
continue; |
|
pos = encodeInteger(buf, pos, state, segment, 1); // sourceFileIndex |
|
pos = encodeInteger(buf, pos, state, segment, 2); // sourceCodeLine |
|
pos = encodeInteger(buf, pos, state, segment, 3); // sourceCodeColumn |
|
if (segment.length === 4) |
|
continue; |
|
pos = encodeInteger(buf, pos, state, segment, 4); // nameIndex |
|
} |
|
} |
|
return td.decode(buf.subarray(0, pos)); |
|
} |
|
function reserve(buf, pos, count) { |
|
if (buf.length > pos + count) |
|
return buf; |
|
const swap = new Uint8Array(buf.length * 2); |
|
swap.set(buf); |
|
return swap; |
|
} |
|
function encodeInteger(buf, pos, state, segment, j) { |
|
const next = segment[j]; |
|
let num = next - state[j]; |
|
state[j] = next; |
|
num = num < 0 ? (-num << 1) | 1 : num << 1; |
|
do { |
|
let clamped = num & 0b011111; |
|
num >>>= 5; |
|
if (num > 0) |
|
clamped |= 0b100000; |
|
buf[pos++] = intToChar[clamped]; |
|
} while (num > 0); |
|
return pos; |
|
} |
|
|
|
// Matches the scheme of a URL, eg "http://" |
|
const schemeRegex = /^[\w+.-]+:\/\//; |
|
/** |
|
* Matches the parts of a URL: |
|
* 1. Scheme, including ":", guaranteed. |
|
* 2. User/password, including "@", optional. |
|
* 3. Host, guaranteed. |
|
* 4. Port, including ":", optional. |
|
* 5. Path, including "/", optional. |
|
*/ |
|
const urlRegex = /^([\w+.-]+:)\/\/([^@/#?]*@)?([^:/#?]*)(:\d+)?(\/[^#?]*)?/; |
|
/** |
|
* File URLs are weird. They dont' need the regular `//` in the scheme, they may or may not start |
|
* with a leading `/`, they can have a domain (but only if they don't start with a Windows drive). |
|
* |
|
* 1. Host, optional. |
|
* 2. Path, which may inclue "/", guaranteed. |
|
*/ |
|
const fileRegex = /^file:(?:\/\/((?![a-z]:)[^/]*)?)?(\/?.*)/i; |
|
function isAbsoluteUrl(input) { |
|
return schemeRegex.test(input); |
|
} |
|
function isSchemeRelativeUrl(input) { |
|
return input.startsWith('//'); |
|
} |
|
function isAbsolutePath(input) { |
|
return input.startsWith('/'); |
|
} |
|
function isFileUrl(input) { |
|
return input.startsWith('file:'); |
|
} |
|
function parseAbsoluteUrl(input) { |
|
const match = urlRegex.exec(input); |
|
return makeUrl(match[1], match[2] || '', match[3], match[4] || '', match[5] || '/'); |
|
} |
|
function parseFileUrl(input) { |
|
const match = fileRegex.exec(input); |
|
const path = match[2]; |
|
return makeUrl('file:', '', match[1] || '', '', isAbsolutePath(path) ? path : '/' + path); |
|
} |
|
function makeUrl(scheme, user, host, port, path) { |
|
return { |
|
scheme, |
|
user, |
|
host, |
|
port, |
|
path, |
|
relativePath: false, |
|
}; |
|
} |
|
function parseUrl(input) { |
|
if (isSchemeRelativeUrl(input)) { |
|
const url = parseAbsoluteUrl('http:' + input); |
|
url.scheme = ''; |
|
return url; |
|
} |
|
if (isAbsolutePath(input)) { |
|
const url = parseAbsoluteUrl('http://foo.com' + input); |
|
url.scheme = ''; |
|
url.host = ''; |
|
return url; |
|
} |
|
if (isFileUrl(input)) |
|
return parseFileUrl(input); |
|
if (isAbsoluteUrl(input)) |
|
return parseAbsoluteUrl(input); |
|
const url = parseAbsoluteUrl('http://foo.com/' + input); |
|
url.scheme = ''; |
|
url.host = ''; |
|
url.relativePath = true; |
|
return url; |
|
} |
|
function stripPathFilename(path) { |
|
// If a path ends with a parent directory "..", then it's a relative path with excess parent |
|
// paths. It's not a file, so we can't strip it. |
|
if (path.endsWith('/..')) |
|
return path; |
|
const index = path.lastIndexOf('/'); |
|
return path.slice(0, index + 1); |
|
} |
|
function mergePaths(url, base) { |
|
// If we're not a relative path, then we're an absolute path, and it doesn't matter what base is. |
|
if (!url.relativePath) |
|
return; |
|
normalizePath(base); |
|
// If the path is just a "/", then it was an empty path to begin with (remember, we're a relative |
|
// path). |
|
if (url.path === '/') { |
|
url.path = base.path; |
|
} |
|
else { |
|
// Resolution happens relative to the base path's directory, not the file. |
|
url.path = stripPathFilename(base.path) + url.path; |
|
} |
|
// If the base path is absolute, then our path is now absolute too. |
|
url.relativePath = base.relativePath; |
|
} |
|
/** |
|
* The path can have empty directories "//", unneeded parents "foo/..", or current directory |
|
* "foo/.". We need to normalize to a standard representation. |
|
*/ |
|
function normalizePath(url) { |
|
const { relativePath } = url; |
|
const pieces = url.path.split('/'); |
|
// We need to preserve the first piece always, so that we output a leading slash. The item at |
|
// pieces[0] is an empty string. |
|
let pointer = 1; |
|
// Positive is the number of real directories we've output, used for popping a parent directory. |
|
// Eg, "foo/bar/.." will have a positive 2, and we can decrement to be left with just "foo". |
|
let positive = 0; |
|
// We need to keep a trailing slash if we encounter an empty directory (eg, splitting "foo/" will |
|
// generate `["foo", ""]` pieces). And, if we pop a parent directory. But once we encounter a |
|
// real directory, we won't need to append, unless the other conditions happen again. |
|
let addTrailingSlash = false; |
|
for (let i = 1; i < pieces.length; i++) { |
|
const piece = pieces[i]; |
|
// An empty directory, could be a trailing slash, or just a double "//" in the path. |
|
if (!piece) { |
|
addTrailingSlash = true; |
|
continue; |
|
} |
|
// If we encounter a real directory, then we don't need to append anymore. |
|
addTrailingSlash = false; |
|
// A current directory, which we can always drop. |
|
if (piece === '.') |
|
continue; |
|
// A parent directory, we need to see if there are any real directories we can pop. Else, we |
|
// have an excess of parents, and we'll need to keep the "..". |
|
if (piece === '..') { |
|
if (positive) { |
|
addTrailingSlash = true; |
|
positive--; |
|
pointer--; |
|
} |
|
else if (relativePath) { |
|
// If we're in a relativePath, then we need to keep the excess parents. Else, in an absolute |
|
// URL, protocol relative URL, or an absolute path, we don't need to keep excess. |
|
pieces[pointer++] = piece; |
|
} |
|
continue; |
|
} |
|
// We've encountered a real directory. Move it to the next insertion pointer, which accounts for |
|
// any popped or dropped directories. |
|
pieces[pointer++] = piece; |
|
positive++; |
|
} |
|
let path = ''; |
|
for (let i = 1; i < pointer; i++) { |
|
path += '/' + pieces[i]; |
|
} |
|
if (!path || (addTrailingSlash && !path.endsWith('/..'))) { |
|
path += '/'; |
|
} |
|
url.path = path; |
|
} |
|
/** |
|
* Attempts to resolve `input` URL/path relative to `base`. |
|
*/ |
|
function resolve$1(input, base) { |
|
if (!input && !base) |
|
return ''; |
|
const url = parseUrl(input); |
|
// If we have a base, and the input isn't already an absolute URL, then we need to merge. |
|
if (base && !url.scheme) { |
|
const baseUrl = parseUrl(base); |
|
url.scheme = baseUrl.scheme; |
|
// If there's no host, then we were just a path. |
|
if (!url.host) { |
|
// The host, user, and port are joined, you can't copy one without the others. |
|
url.user = baseUrl.user; |
|
url.host = baseUrl.host; |
|
url.port = baseUrl.port; |
|
} |
|
mergePaths(url, baseUrl); |
|
} |
|
normalizePath(url); |
|
// If the input (and base, if there was one) are both relative, then we need to output a relative. |
|
if (url.relativePath) { |
|
// The first char is always a "/". |
|
const path = url.path.slice(1); |
|
if (!path) |
|
return '.'; |
|
// If base started with a leading ".", or there is no base and input started with a ".", then we |
|
// need to ensure that the relative path starts with a ".". We don't know if relative starts |
|
// with a "..", though, so check before prepending. |
|
const keepRelative = (base || input).startsWith('.'); |
|
return !keepRelative || path.startsWith('.') ? path : './' + path; |
|
} |
|
// If there's no host (and no scheme/user/port), then we need to output an absolute path. |
|
if (!url.scheme && !url.host) |
|
return url.path; |
|
// We're outputting either an absolute URL, or a protocol relative one. |
|
return `${url.scheme}//${url.user}${url.host}${url.port}${url.path}`; |
|
} |
|
|
|
function resolve(input, base) { |
|
// The base is always treated as a directory, if it's not empty. |
|
// https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327 |
|
// https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401 |
|
if (base && !base.endsWith('/')) |
|
base += '/'; |
|
return resolve$1(input, base); |
|
} |
|
|
|
/** |
|
* Removes everything after the last "/", but leaves the slash. |
|
*/ |
|
function stripFilename(path) { |
|
if (!path) |
|
return ''; |
|
const index = path.lastIndexOf('/'); |
|
return path.slice(0, index + 1); |
|
} |
|
|
|
const COLUMN$1 = 0; |
|
const SOURCES_INDEX$1 = 1; |
|
const SOURCE_LINE$1 = 2; |
|
const SOURCE_COLUMN$1 = 3; |
|
const NAMES_INDEX$1 = 4; |
|
|
|
function maybeSort(mappings, owned) { |
|
const unsortedIndex = nextUnsortedSegmentLine(mappings, 0); |
|
if (unsortedIndex === mappings.length) |
|
return mappings; |
|
// If we own the array (meaning we parsed it from JSON), then we're free to directly mutate it. If |
|
// not, we do not want to modify the consumer's input array. |
|
if (!owned) |
|
mappings = mappings.slice(); |
|
for (let i = unsortedIndex; i < mappings.length; i = nextUnsortedSegmentLine(mappings, i + 1)) { |
|
mappings[i] = sortSegments(mappings[i], owned); |
|
} |
|
return mappings; |
|
} |
|
function nextUnsortedSegmentLine(mappings, start) { |
|
for (let i = start; i < mappings.length; i++) { |
|
if (!isSorted(mappings[i])) |
|
return i; |
|
} |
|
return mappings.length; |
|
} |
|
function isSorted(line) { |
|
for (let j = 1; j < line.length; j++) { |
|
if (line[j][COLUMN$1] < line[j - 1][COLUMN$1]) { |
|
return false; |
|
} |
|
} |
|
return true; |
|
} |
|
function sortSegments(line, owned) { |
|
if (!owned) |
|
line = line.slice(); |
|
return line.sort(sortComparator); |
|
} |
|
function sortComparator(a, b) { |
|
return a[COLUMN$1] - b[COLUMN$1]; |
|
} |
|
|
|
let found = false; |
|
/** |
|
* A binary search implementation that returns the index if a match is found. |
|
* If no match is found, then the left-index (the index associated with the item that comes just |
|
* before the desired index) is returned. To maintain proper sort order, a splice would happen at |
|
* the next index: |
|
* |
|
* ```js |
|
* const array = [1, 3]; |
|
* const needle = 2; |
|
* const index = binarySearch(array, needle, (item, needle) => item - needle); |
|
* |
|
* assert.equal(index, 0); |
|
* array.splice(index + 1, 0, needle); |
|
* assert.deepEqual(array, [1, 2, 3]); |
|
* ``` |
|
*/ |
|
function binarySearch(haystack, needle, low, high) { |
|
while (low <= high) { |
|
const mid = low + ((high - low) >> 1); |
|
const cmp = haystack[mid][COLUMN$1] - needle; |
|
if (cmp === 0) { |
|
found = true; |
|
return mid; |
|
} |
|
if (cmp < 0) { |
|
low = mid + 1; |
|
} |
|
else { |
|
high = mid - 1; |
|
} |
|
} |
|
found = false; |
|
return low - 1; |
|
} |
|
function upperBound(haystack, needle, index) { |
|
for (let i = index + 1; i < haystack.length; i++, index++) { |
|
if (haystack[i][COLUMN$1] !== needle) |
|
break; |
|
} |
|
return index; |
|
} |
|
function lowerBound(haystack, needle, index) { |
|
for (let i = index - 1; i >= 0; i--, index--) { |
|
if (haystack[i][COLUMN$1] !== needle) |
|
break; |
|
} |
|
return index; |
|
} |
|
function memoizedState() { |
|
return { |
|
lastKey: -1, |
|
lastNeedle: -1, |
|
lastIndex: -1, |
|
}; |
|
} |
|
/** |
|
* This overly complicated beast is just to record the last tested line/column and the resulting |
|
* index, allowing us to skip a few tests if mappings are monotonically increasing. |
|
*/ |
|
function memoizedBinarySearch(haystack, needle, state, key) { |
|
const { lastKey, lastNeedle, lastIndex } = state; |
|
let low = 0; |
|
let high = haystack.length - 1; |
|
if (key === lastKey) { |
|
if (needle === lastNeedle) { |
|
found = lastIndex !== -1 && haystack[lastIndex][COLUMN$1] === needle; |
|
return lastIndex; |
|
} |
|
if (needle >= lastNeedle) { |
|
// lastIndex may be -1 if the previous needle was not found. |
|
low = lastIndex === -1 ? 0 : lastIndex; |
|
} |
|
else { |
|
high = lastIndex; |
|
} |
|
} |
|
state.lastKey = key; |
|
state.lastNeedle = needle; |
|
return (state.lastIndex = binarySearch(haystack, needle, low, high)); |
|
} |
|
|
|
const AnyMap = function (map, mapUrl) { |
|
const parsed = typeof map === 'string' ? JSON.parse(map) : map; |
|
if (!('sections' in parsed)) |
|
return new TraceMap(parsed, mapUrl); |
|
const mappings = []; |
|
const sources = []; |
|
const sourcesContent = []; |
|
const names = []; |
|
const { sections } = parsed; |
|
let i = 0; |
|
for (; i < sections.length - 1; i++) { |
|
const no = sections[i + 1].offset; |
|
addSection(sections[i], mapUrl, mappings, sources, sourcesContent, names, no.line, no.column); |
|
} |
|
if (sections.length > 0) { |
|
addSection(sections[i], mapUrl, mappings, sources, sourcesContent, names, Infinity, Infinity); |
|
} |
|
const joined = { |
|
version: 3, |
|
file: parsed.file, |
|
names, |
|
sources, |
|
sourcesContent, |
|
mappings, |
|
}; |
|
return presortedDecodedMap(joined); |
|
}; |
|
function addSection(section, mapUrl, mappings, sources, sourcesContent, names, stopLine, stopColumn) { |
|
const map = AnyMap(section.map, mapUrl); |
|
const { line: lineOffset, column: columnOffset } = section.offset; |
|
const sourcesOffset = sources.length; |
|
const namesOffset = names.length; |
|
const decoded = decodedMappings(map); |
|
const { resolvedSources } = map; |
|
append(sources, resolvedSources); |
|
append(sourcesContent, map.sourcesContent || fillSourcesContent(resolvedSources.length)); |
|
append(names, map.names); |
|
// If this section jumps forwards several lines, we need to add lines to the output mappings catch up. |
|
for (let i = mappings.length; i <= lineOffset; i++) |
|
mappings.push([]); |
|
// We can only add so many lines before we step into the range that the next section's map |
|
// controls. When we get to the last line, then we'll start checking the segments to see if |
|
// they've crossed into the column range. |
|
const stopI = stopLine - lineOffset; |
|
const len = Math.min(decoded.length, stopI + 1); |
|
for (let i = 0; i < len; i++) { |
|
const line = decoded[i]; |
|
// On the 0th loop, the line will already exist due to a previous section, or the line catch up |
|
// loop above. |
|
const out = i === 0 ? mappings[lineOffset] : (mappings[lineOffset + i] = []); |
|
// On the 0th loop, the section's column offset shifts us forward. On all other lines (since the |
|
// map can be multiple lines), it doesn't. |
|
const cOffset = i === 0 ? columnOffset : 0; |
|
for (let j = 0; j < line.length; j++) { |
|
const seg = line[j]; |
|
const column = cOffset + seg[COLUMN$1]; |
|
// If this segment steps into the column range that the next section's map controls, we need |
|
// to stop early. |
|
if (i === stopI && column >= stopColumn) |
|
break; |
|
if (seg.length === 1) { |
|
out.push([column]); |
|
continue; |
|
} |
|
const sourcesIndex = sourcesOffset + seg[SOURCES_INDEX$1]; |
|
const sourceLine = seg[SOURCE_LINE$1]; |
|
const sourceColumn = seg[SOURCE_COLUMN$1]; |
|
if (seg.length === 4) { |
|
out.push([column, sourcesIndex, sourceLine, sourceColumn]); |
|
continue; |
|
} |
|
out.push([column, sourcesIndex, sourceLine, sourceColumn, namesOffset + seg[NAMES_INDEX$1]]); |
|
} |
|
} |
|
} |
|
function append(arr, other) { |
|
for (let i = 0; i < other.length; i++) |
|
arr.push(other[i]); |
|
} |
|
// Sourcemaps don't need to have sourcesContent, and if they don't, we need to create an array of |
|
// equal length to the sources. This is because the sources and sourcesContent are paired arrays, |
|
// where `sourcesContent[i]` is the content of the `sources[i]` file. If we didn't, then joined |
|
// sourcemap would desynchronize the sources/contents. |
|
function fillSourcesContent(len) { |
|
const sourcesContent = []; |
|
for (let i = 0; i < len; i++) |
|
sourcesContent[i] = null; |
|
return sourcesContent; |
|
} |
|
|
|
const INVALID_ORIGINAL_MAPPING = Object.freeze({ |
|
source: null, |
|
line: null, |
|
column: null, |
|
name: null, |
|
}); |
|
Object.freeze({ |
|
line: null, |
|
column: null, |
|
}); |
|
const LINE_GTR_ZERO = '`line` must be greater than 0 (lines start at line 1)'; |
|
const COL_GTR_EQ_ZERO = '`column` must be greater than or equal to 0 (columns start at column 0)'; |
|
const LEAST_UPPER_BOUND = -1; |
|
const GREATEST_LOWER_BOUND = 1; |
|
/** |
|
* Returns the decoded (array of lines of segments) form of the SourceMap's mappings field. |
|
*/ |
|
let decodedMappings; |
|
/** |
|
* A higher-level API to find the source/line/column associated with a generated line/column |
|
* (think, from a stack trace). Line is 1-based, but column is 0-based, due to legacy behavior in |
|
* `source-map` library. |
|
*/ |
|
let originalPositionFor; |
|
/** |
|
* A helper that skips sorting of the input map's mappings array, which can be expensive for larger |
|
* maps. |
|
*/ |
|
let presortedDecodedMap; |
|
class TraceMap { |
|
constructor(map, mapUrl) { |
|
this._decodedMemo = memoizedState(); |
|
this._bySources = undefined; |
|
this._bySourceMemos = undefined; |
|
const isString = typeof map === 'string'; |
|
if (!isString && map.constructor === TraceMap) |
|
return map; |
|
const parsed = (isString ? JSON.parse(map) : map); |
|
const { version, file, names, sourceRoot, sources, sourcesContent } = parsed; |
|
this.version = version; |
|
this.file = file; |
|
this.names = names; |
|
this.sourceRoot = sourceRoot; |
|
this.sources = sources; |
|
this.sourcesContent = sourcesContent; |
|
if (sourceRoot || mapUrl) { |
|
const from = resolve(sourceRoot || '', stripFilename(mapUrl)); |
|
this.resolvedSources = sources.map((s) => resolve(s || '', from)); |
|
} |
|
else { |
|
this.resolvedSources = sources.map((s) => s || ''); |
|
} |
|
const { mappings } = parsed; |
|
if (typeof mappings === 'string') { |
|
this._encoded = mappings; |
|
this._decoded = undefined; |
|
} |
|
else { |
|
this._encoded = undefined; |
|
this._decoded = maybeSort(mappings, isString); |
|
} |
|
} |
|
} |
|
(() => { |
|
decodedMappings = (map) => { |
|
return (map._decoded || (map._decoded = decode(map._encoded))); |
|
}; |
|
originalPositionFor = (map, { line, column, bias }) => { |
|
line--; |
|
if (line < 0) |
|
throw new Error(LINE_GTR_ZERO); |
|
if (column < 0) |
|
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. |
|
if (line >= decoded.length) |
|
return INVALID_ORIGINAL_MAPPING; |
|
const segment = traceSegmentInternal(decoded[line], map._decodedMemo, line, column, bias || GREATEST_LOWER_BOUND); |
|
if (segment == null) |
|
return INVALID_ORIGINAL_MAPPING; |
|
if (segment.length == 1) |
|
return INVALID_ORIGINAL_MAPPING; |
|
const { names, resolvedSources } = map; |
|
return { |
|
source: resolvedSources[segment[SOURCES_INDEX$1]], |
|
line: segment[SOURCE_LINE$1] + 1, |
|
column: segment[SOURCE_COLUMN$1], |
|
name: segment.length === 5 ? names[segment[NAMES_INDEX$1]] : null, |
|
}; |
|
}; |
|
presortedDecodedMap = (map, mapUrl) => { |
|
const clone = Object.assign({}, map); |
|
clone.mappings = []; |
|
const tracer = new TraceMap(clone, mapUrl); |
|
tracer._decoded = map.mappings; |
|
return tracer; |
|
}; |
|
})(); |
|
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 null; |
|
return segments[index]; |
|
} |
|
|
|
/** |
|
* Gets the index associated with `key` in the backing array, if it is already present. |
|
*/ |
|
let get; |
|
/** |
|
* Puts `key` into the backing array, if it is not already present. Returns |
|
* the index of the `key` in the backing array. |
|
*/ |
|
let put; |
|
/** |
|
* SetArray acts like a `Set` (allowing only one occurrence of a string `key`), but provides the |
|
* index of the `key` in the backing array. |
|
* |
|
* This is designed to allow synchronizing a second array with the contents of the backing array, |
|
* like how in a sourcemap `sourcesContent[i]` is the source content associated with `source[i]`, |
|
* and there are never duplicates. |
|
*/ |
|
class SetArray { |
|
constructor() { |
|
this._indexes = { __proto__: null }; |
|
this.array = []; |
|
} |
|
} |
|
(() => { |
|
get = (strarr, key) => strarr._indexes[key]; |
|
put = (strarr, key) => { |
|
// The key may or may not be present. If it is present, it's a number. |
|
const index = get(strarr, key); |
|
if (index !== undefined) |
|
return index; |
|
const { array, _indexes: indexes } = strarr; |
|
return (indexes[key] = array.push(key) - 1); |
|
}; |
|
})(); |
|
|
|
const COLUMN = 0; |
|
const SOURCES_INDEX = 1; |
|
const SOURCE_LINE = 2; |
|
const SOURCE_COLUMN = 3; |
|
const NAMES_INDEX = 4; |
|
|
|
const NO_NAME = -1; |
|
/** |
|
* Same as `addMapping`, but will only add the mapping if it generates useful information in the |
|
* resulting map. This only works correctly if mappings are added **in order**, meaning you should |
|
* not add a mapping with a lower generated line/column than one that came before. |
|
*/ |
|
let maybeAddMapping; |
|
/** |
|
* Adds/removes the content of the source file to the source map. |
|
*/ |
|
let setSourceContent; |
|
/** |
|
* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects |
|
* a sourcemap, or to JSON.stringify. |
|
*/ |
|
let toDecodedMap; |
|
/** |
|
* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects |
|
* a sourcemap, or to JSON.stringify. |
|
*/ |
|
let toEncodedMap; |
|
// This split declaration is only so that terser can elminiate the static initialization block. |
|
let addSegmentInternal; |
|
/** |
|
* Provides the state to generate a sourcemap. |
|
*/ |
|
class GenMapping { |
|
constructor({ file, sourceRoot } = {}) { |
|
this._names = new SetArray(); |
|
this._sources = new SetArray(); |
|
this._sourcesContent = []; |
|
this._mappings = []; |
|
this.file = file; |
|
this.sourceRoot = sourceRoot; |
|
} |
|
} |
|
(() => { |
|
maybeAddMapping = (map, mapping) => { |
|
return addMappingInternal(true, map, mapping); |
|
}; |
|
setSourceContent = (map, source, content) => { |
|
const { _sources: sources, _sourcesContent: sourcesContent } = map; |
|
sourcesContent[put(sources, source)] = content; |
|
}; |
|
toDecodedMap = (map) => { |
|
const { file, sourceRoot, _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; |
|
removeEmptyFinalLines(mappings); |
|
return { |
|
version: 3, |
|
file: file || undefined, |
|
names: names.array, |
|
sourceRoot: sourceRoot || undefined, |
|
sources: sources.array, |
|
sourcesContent, |
|
mappings, |
|
}; |
|
}; |
|
toEncodedMap = (map) => { |
|
const decoded = toDecodedMap(map); |
|
return Object.assign(Object.assign({}, decoded), { mappings: encode(decoded.mappings) }); |
|
}; |
|
// Internal helpers |
|
addSegmentInternal = (skipable, map, genLine, genColumn, source, sourceLine, sourceColumn, name) => { |
|
const { _mappings: mappings, _sources: sources, _sourcesContent: sourcesContent, _names: names, } = map; |
|
const line = getLine(mappings, genLine); |
|
const index = getColumnIndex(line, genColumn); |
|
if (!source) { |
|
if (skipable && skipSourceless(line, index)) |
|
return; |
|
return insert(line, index, [genColumn]); |
|
} |
|
const sourcesIndex = put(sources, source); |
|
const namesIndex = name ? put(names, name) : NO_NAME; |
|
if (sourcesIndex === sourcesContent.length) |
|
sourcesContent[sourcesIndex] = null; |
|
if (skipable && skipSource(line, index, sourcesIndex, sourceLine, sourceColumn, namesIndex)) { |
|
return; |
|
} |
|
return insert(line, index, name |
|
? [genColumn, sourcesIndex, sourceLine, sourceColumn, namesIndex] |
|
: [genColumn, sourcesIndex, sourceLine, sourceColumn]); |
|
}; |
|
})(); |
|
function getLine(mappings, index) { |
|
for (let i = mappings.length; i <= index; i++) { |
|
mappings[i] = []; |
|
} |
|
return mappings[index]; |
|
} |
|
function getColumnIndex(line, genColumn) { |
|
let index = line.length; |
|
for (let i = index - 1; i >= 0; index = i--) { |
|
const current = line[i]; |
|
if (genColumn >= current[COLUMN]) |
|
break; |
|
} |
|
return index; |
|
} |
|
function insert(array, index, value) { |
|
for (let i = array.length; i > index; i--) { |
|
array[i] = array[i - 1]; |
|
} |
|
array[index] = value; |
|
} |
|
function removeEmptyFinalLines(mappings) { |
|
const { length } = mappings; |
|
let len = length; |
|
for (let i = len - 1; i >= 0; len = i, i--) { |
|
if (mappings[i].length > 0) |
|
break; |
|
} |
|
if (len < length) |
|
mappings.length = len; |
|
} |
|
function skipSourceless(line, index) { |
|
// The start of a line is already sourceless, so adding a sourceless segment to the beginning |
|
// doesn't generate any useful information. |
|
if (index === 0) |
|
return true; |
|
const prev = line[index - 1]; |
|
// If the previous segment is also sourceless, then adding another sourceless segment doesn't |
|
// genrate any new information. Else, this segment will end the source/named segment and point to |
|
// a sourceless position, which is useful. |
|
return prev.length === 1; |
|
} |
|
function skipSource(line, index, sourcesIndex, sourceLine, sourceColumn, namesIndex) { |
|
// A source/named segment at the start of a line gives position at that genColumn |
|
if (index === 0) |
|
return false; |
|
const prev = line[index - 1]; |
|
// If the previous segment is sourceless, then we're transitioning to a source. |
|
if (prev.length === 1) |
|
return false; |
|
// If the previous segment maps to the exact same source position, then this segment doesn't |
|
// provide any new position information. |
|
return (sourcesIndex === prev[SOURCES_INDEX] && |
|
sourceLine === prev[SOURCE_LINE] && |
|
sourceColumn === prev[SOURCE_COLUMN] && |
|
namesIndex === (prev.length === 5 ? prev[NAMES_INDEX] : NO_NAME)); |
|
} |
|
function addMappingInternal(skipable, map, mapping) { |
|
const { generated, source, original, name } = mapping; |
|
if (!source) { |
|
return addSegmentInternal(skipable, map, generated.line - 1, generated.column, null, null, null, null); |
|
} |
|
const s = source; |
|
return addSegmentInternal(skipable, map, generated.line - 1, generated.column, s, original.line - 1, original.column, name); |
|
} |
|
|
|
class SourceMapConsumer { |
|
constructor(map, mapUrl) { |
|
const trace = (this._map = new AnyMap(map, mapUrl)); |
|
this.file = trace.file; |
|
this.names = trace.names; |
|
this.sourceRoot = trace.sourceRoot; |
|
this.sources = trace.resolvedSources; |
|
this.sourcesContent = trace.sourcesContent; |
|
} |
|
originalPositionFor(needle) { |
|
return originalPositionFor(this._map, needle); |
|
} |
|
destroy() { |
|
// noop. |
|
} |
|
} |
|
class SourceMapGenerator { |
|
constructor(opts) { |
|
this._map = new GenMapping(opts); |
|
} |
|
addMapping(mapping) { |
|
maybeAddMapping(this._map, mapping); |
|
} |
|
setSourceContent(source, content) { |
|
setSourceContent(this._map, source, content); |
|
} |
|
toJSON() { |
|
return toEncodedMap(this._map); |
|
} |
|
toDecodedMap() { |
|
return toDecodedMap(this._map); |
|
} |
|
} |
|
|
|
exports.SourceMapConsumer = SourceMapConsumer; |
|
exports.SourceMapGenerator = SourceMapGenerator; |
|
|
|
Object.defineProperty(exports, '__esModule', { value: true }); |
|
|
|
})); |
|
//# sourceMappingURL=source-map.umd.js.map
|
|
|