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929 lines
32 KiB
929 lines
32 KiB
const comma = ','.charCodeAt(0);
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const semicolon = ';'.charCodeAt(0);
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const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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const intToChar = new Uint8Array(64); // 64 possible chars.
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const charToInteger = new Uint8Array(128); // z is 122 in ASCII
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for (let i = 0; i < chars.length; i++) {
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const c = chars.charCodeAt(i);
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charToInteger[c] = i;
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intToChar[i] = c;
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}
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// Provide a fallback for older environments.
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const td = typeof TextDecoder !== 'undefined'
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? new TextDecoder()
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: typeof Buffer !== 'undefined'
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? {
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decode(buf) {
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const out = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);
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return out.toString();
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},
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}
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: {
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decode(buf) {
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let out = '';
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for (let i = 0; i < buf.length; i++) {
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out += String.fromCharCode(buf[i]);
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}
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return out;
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},
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};
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function decode(mappings) {
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const state = new Int32Array(5);
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const decoded = [];
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let line = [];
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let sorted = true;
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let lastCol = 0;
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for (let i = 0; i < mappings.length;) {
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const c = mappings.charCodeAt(i);
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if (c === comma) {
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i++;
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}
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else if (c === semicolon) {
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state[0] = lastCol = 0;
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if (!sorted)
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sort(line);
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sorted = true;
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decoded.push(line);
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line = [];
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i++;
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}
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else {
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i = decodeInteger(mappings, i, state, 0); // generatedCodeColumn
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const col = state[0];
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if (col < lastCol)
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sorted = false;
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lastCol = col;
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if (!hasMoreSegments(mappings, i)) {
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line.push([col]);
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continue;
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}
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i = decodeInteger(mappings, i, state, 1); // sourceFileIndex
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i = decodeInteger(mappings, i, state, 2); // sourceCodeLine
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i = decodeInteger(mappings, i, state, 3); // sourceCodeColumn
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if (!hasMoreSegments(mappings, i)) {
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line.push([col, state[1], state[2], state[3]]);
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continue;
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}
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i = decodeInteger(mappings, i, state, 4); // nameIndex
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line.push([col, state[1], state[2], state[3], state[4]]);
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}
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}
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if (!sorted)
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sort(line);
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decoded.push(line);
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return decoded;
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}
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function decodeInteger(mappings, pos, state, j) {
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let value = 0;
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let shift = 0;
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let integer = 0;
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do {
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const c = mappings.charCodeAt(pos++);
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integer = charToInteger[c];
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value |= (integer & 31) << shift;
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shift += 5;
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} while (integer & 32);
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const shouldNegate = value & 1;
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value >>>= 1;
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if (shouldNegate) {
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value = -0x80000000 | -value;
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}
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state[j] += value;
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return pos;
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}
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function hasMoreSegments(mappings, i) {
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if (i >= mappings.length)
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return false;
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const c = mappings.charCodeAt(i);
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if (c === comma || c === semicolon)
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return false;
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return true;
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}
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function sort(line) {
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line.sort(sortComparator$1);
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}
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function sortComparator$1(a, b) {
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return a[0] - b[0];
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}
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function encode(decoded) {
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const state = new Int32Array(5);
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let buf = new Uint8Array(1024);
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let pos = 0;
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for (let i = 0; i < decoded.length; i++) {
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const line = decoded[i];
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if (i > 0) {
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buf = reserve(buf, pos, 1);
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buf[pos++] = semicolon;
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}
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if (line.length === 0)
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continue;
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state[0] = 0;
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for (let j = 0; j < line.length; j++) {
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const segment = line[j];
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// We can push up to 5 ints, each int can take at most 7 chars, and we
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// may push a comma.
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buf = reserve(buf, pos, 36);
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if (j > 0)
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buf[pos++] = comma;
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pos = encodeInteger(buf, pos, state, segment, 0); // generatedCodeColumn
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if (segment.length === 1)
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continue;
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pos = encodeInteger(buf, pos, state, segment, 1); // sourceFileIndex
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pos = encodeInteger(buf, pos, state, segment, 2); // sourceCodeLine
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pos = encodeInteger(buf, pos, state, segment, 3); // sourceCodeColumn
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if (segment.length === 4)
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continue;
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pos = encodeInteger(buf, pos, state, segment, 4); // nameIndex
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}
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}
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return td.decode(buf.subarray(0, pos));
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}
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function reserve(buf, pos, count) {
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if (buf.length > pos + count)
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return buf;
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const swap = new Uint8Array(buf.length * 2);
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swap.set(buf);
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return swap;
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}
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function encodeInteger(buf, pos, state, segment, j) {
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const next = segment[j];
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let num = next - state[j];
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state[j] = next;
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num = num < 0 ? (-num << 1) | 1 : num << 1;
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do {
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let clamped = num & 0b011111;
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num >>>= 5;
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if (num > 0)
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clamped |= 0b100000;
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buf[pos++] = intToChar[clamped];
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} while (num > 0);
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return pos;
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}
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// Matches the scheme of a URL, eg "http://"
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const schemeRegex = /^[\w+.-]+:\/\//;
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/**
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* Matches the parts of a URL:
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* 1. Scheme, including ":", guaranteed.
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* 2. User/password, including "@", optional.
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* 3. Host, guaranteed.
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* 4. Port, including ":", optional.
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* 5. Path, including "/", optional.
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*/
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const urlRegex = /^([\w+.-]+:)\/\/([^@/#?]*@)?([^:/#?]*)(:\d+)?(\/[^#?]*)?/;
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/**
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* File URLs are weird. They dont' need the regular `//` in the scheme, they may or may not start
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* with a leading `/`, they can have a domain (but only if they don't start with a Windows drive).
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*
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* 1. Host, optional.
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* 2. Path, which may inclue "/", guaranteed.
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*/
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const fileRegex = /^file:(?:\/\/((?![a-z]:)[^/]*)?)?(\/?.*)/i;
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function isAbsoluteUrl(input) {
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return schemeRegex.test(input);
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}
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function isSchemeRelativeUrl(input) {
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return input.startsWith('//');
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}
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function isAbsolutePath(input) {
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return input.startsWith('/');
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}
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function isFileUrl(input) {
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return input.startsWith('file:');
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}
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function parseAbsoluteUrl(input) {
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const match = urlRegex.exec(input);
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return makeUrl(match[1], match[2] || '', match[3], match[4] || '', match[5] || '/');
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}
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function parseFileUrl(input) {
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const match = fileRegex.exec(input);
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const path = match[2];
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return makeUrl('file:', '', match[1] || '', '', isAbsolutePath(path) ? path : '/' + path);
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}
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function makeUrl(scheme, user, host, port, path) {
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return {
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scheme,
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user,
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host,
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port,
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path,
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relativePath: false,
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};
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}
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function parseUrl(input) {
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if (isSchemeRelativeUrl(input)) {
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const url = parseAbsoluteUrl('http:' + input);
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url.scheme = '';
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return url;
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}
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if (isAbsolutePath(input)) {
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const url = parseAbsoluteUrl('http://foo.com' + input);
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url.scheme = '';
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url.host = '';
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return url;
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}
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if (isFileUrl(input))
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return parseFileUrl(input);
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if (isAbsoluteUrl(input))
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return parseAbsoluteUrl(input);
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const url = parseAbsoluteUrl('http://foo.com/' + input);
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url.scheme = '';
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url.host = '';
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url.relativePath = true;
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return url;
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}
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function stripPathFilename(path) {
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// If a path ends with a parent directory "..", then it's a relative path with excess parent
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// paths. It's not a file, so we can't strip it.
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if (path.endsWith('/..'))
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return path;
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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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function mergePaths(url, base) {
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// If we're not a relative path, then we're an absolute path, and it doesn't matter what base is.
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if (!url.relativePath)
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return;
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normalizePath(base);
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// If the path is just a "/", then it was an empty path to begin with (remember, we're a relative
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// path).
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if (url.path === '/') {
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url.path = base.path;
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}
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else {
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// Resolution happens relative to the base path's directory, not the file.
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url.path = stripPathFilename(base.path) + url.path;
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}
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// If the base path is absolute, then our path is now absolute too.
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url.relativePath = base.relativePath;
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}
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/**
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* The path can have empty directories "//", unneeded parents "foo/..", or current directory
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* "foo/.". We need to normalize to a standard representation.
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*/
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function normalizePath(url) {
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const { relativePath } = url;
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const pieces = url.path.split('/');
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// We need to preserve the first piece always, so that we output a leading slash. The item at
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// pieces[0] is an empty string.
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let pointer = 1;
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// Positive is the number of real directories we've output, used for popping a parent directory.
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// Eg, "foo/bar/.." will have a positive 2, and we can decrement to be left with just "foo".
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let positive = 0;
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// We need to keep a trailing slash if we encounter an empty directory (eg, splitting "foo/" will
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// generate `["foo", ""]` pieces). And, if we pop a parent directory. But once we encounter a
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// real directory, we won't need to append, unless the other conditions happen again.
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let addTrailingSlash = false;
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for (let i = 1; i < pieces.length; i++) {
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const piece = pieces[i];
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// An empty directory, could be a trailing slash, or just a double "//" in the path.
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|
if (!piece) {
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addTrailingSlash = true;
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continue;
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}
|
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// If we encounter a real directory, then we don't need to append anymore.
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addTrailingSlash = false;
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// A current directory, which we can always drop.
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if (piece === '.')
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continue;
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// A parent directory, we need to see if there are any real directories we can pop. Else, we
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// have an excess of parents, and we'll need to keep the "..".
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if (piece === '..') {
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if (positive) {
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addTrailingSlash = true;
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positive--;
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pointer--;
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}
|
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else if (relativePath) {
|
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// If we're in a relativePath, then we need to keep the excess parents. Else, in an absolute
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// URL, protocol relative URL, or an absolute path, we don't need to keep excess.
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pieces[pointer++] = piece;
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}
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continue;
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}
|
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// We've encountered a real directory. Move it to the next insertion pointer, which accounts for
|
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// any popped or dropped directories.
|
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pieces[pointer++] = piece;
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positive++;
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}
|
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let path = '';
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for (let i = 1; i < pointer; i++) {
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path += '/' + pieces[i];
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}
|
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if (!path || (addTrailingSlash && !path.endsWith('/..'))) {
|
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path += '/';
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}
|
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url.path = path;
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}
|
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/**
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* Attempts to resolve `input` URL/path relative to `base`.
|
|
*/
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function resolve$1(input, base) {
|
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if (!input && !base)
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return '';
|
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const url = parseUrl(input);
|
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// If we have a base, and the input isn't already an absolute URL, then we need to merge.
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if (base && !url.scheme) {
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const baseUrl = parseUrl(base);
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url.scheme = baseUrl.scheme;
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// If there's no host, then we were just a path.
|
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if (!url.host) {
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// The host, user, and port are joined, you can't copy one without the others.
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url.user = baseUrl.user;
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url.host = baseUrl.host;
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url.port = baseUrl.port;
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}
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mergePaths(url, baseUrl);
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}
|
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normalizePath(url);
|
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// If the input (and base, if there was one) are both relative, then we need to output a relative.
|
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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
|
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// with a "..", though, so check before prepending.
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const keepRelative = (base || input).startsWith('.');
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return !keepRelative || path.startsWith('.') ? path : './' + path;
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}
|
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// If there's no host (and no scheme/user/port), then we need to output an absolute path.
|
|
if (!url.scheme && !url.host)
|
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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
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if (base && !base.endsWith('/'))
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base += '/';
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return resolve$1(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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*/
|
|
function stripFilename(path) {
|
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if (!path)
|
|
return '';
|
|
const index = path.lastIndexOf('/');
|
|
return path.slice(0, index + 1);
|
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}
|
|
|
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const COLUMN$1 = 0;
|
|
const SOURCES_INDEX$1 = 1;
|
|
const SOURCE_LINE$1 = 2;
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const SOURCE_COLUMN$1 = 3;
|
|
const NAMES_INDEX$1 = 4;
|
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|
|
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)) {
|
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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);
|
|
}
|
|
}
|
|
|
|
export { SourceMapConsumer, SourceMapGenerator };
|
|
//# sourceMappingURL=source-map.mjs.map
|