(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@jridgewell/set-array'), require('@jridgewell/sourcemap-codec'), require('@jridgewell/trace-mapping')) :
typeof define === 'function' && define.amd ? define(['exports', '@jridgewell/set-array', '@jridgewell/sourcemap-codec', '@jridgewell/trace-mapping'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.genMapping = {}, global.setArray, global.sourcemapCodec, global.traceMapping));
})(this, (function (exports, setArray, sourcemapCodec, traceMapping) { 'use strict';
const COLUMN = 0;
const SOURCES_INDEX = 1;
const SOURCE_LINE = 2;
const SOURCE_COLUMN = 3;
const NAMES_INDEX = 4;
const NO_NAME = -1;
/**
* A low-level API to associate a generated position with an original source position. Line and
* column here are 0-based, unlike `addMapping`.
*/
exports.addSegment = void 0;
/**
* A high-level API to associate a generated position with an original source position. Line is
* 1-based, but column is 0-based, due to legacy behavior in `source-map` library.
*/
exports.addMapping = void 0;
/**
* Same as `addSegment`, but will only add the segment if it generates useful information in the
* resulting map. This only works correctly if segments are added **in order**, meaning you should
* not add a segment with a lower generated line/column than one that came before.
*/
exports.maybeAddSegment = void 0;
/**
* 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.
*/
exports.maybeAddMapping = void 0;
/**
* Adds/removes the content of the source file to the source map.
*/
exports.setSourceContent = void 0;
/**
* Returns a sourcemap object (with decoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
exports.toDecodedMap = void 0;
/**
* Returns a sourcemap object (with encoded mappings) suitable for passing to a library that expects
* a sourcemap, or to JSON.stringify.
*/
exports.toEncodedMap = void 0;
/**
* Constructs a new GenMapping, using the already present mappings of the input.
*/
exports.fromMap = void 0;
/**
* Returns an array of high-level mapping objects for every recorded segment, which could then be
* passed to the `source-map` library.
*/
exports.allMappings = void 0;
// 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.SetArray();
this._sources = new setArray.SetArray();
this._sourcesContent = [];
this._mappings = [];
this.file = file;
this.sourceRoot = sourceRoot;
}
}
(() => {
exports.addSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => {
return addSegmentInternal(false, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content);
};
exports.maybeAddSegment = (map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => {
return addSegmentInternal(true, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content);
};
exports.addMapping = (map, mapping) => {
return addMappingInternal(false, map, mapping);
};
exports.maybeAddMapping = (map, mapping) => {
return addMappingInternal(true, map, mapping);
};
exports.setSourceContent = (map, source, content) => {
const { _sources: sources, _sourcesContent: sourcesContent } = map;
sourcesContent[setArray.put(sources, source)] = content;
};
exports.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,
};
};
exports.toEncodedMap = (map) => {
const decoded = exports.toDecodedMap(map);
return Object.assign(Object.assign({}, decoded), { mappings: sourcemapCodec.encode(decoded.mappings) });
};
exports.allMappings = (map) => {
const out = [];
const { _mappings: mappings, _sources: sources, _names: names } = map;
for (let i = 0; i < mappings.length; i++) {
const line = mappings[i];
for (let j = 0; j < line.length; j++) {
const seg = line[j];
const generated = { line: i + 1, column: seg[COLUMN] };
let source = undefined;
let original = undefined;
let name = undefined;
if (seg.length !== 1) {
source = sources.array[seg[SOURCES_INDEX]];
original = { line: seg[SOURCE_LINE] + 1, column: seg[SOURCE_COLUMN] };
if (seg.length === 5)
name = names.array[seg[NAMES_INDEX]];
}
out.push({ generated, source, original, name });
}
}
return out;
};
exports.fromMap = (input) => {
const map = new traceMapping.TraceMap(input);
const gen = new GenMapping({ file: map.file, sourceRoot: map.sourceRoot });
putAll(gen._names, map.names);
putAll(gen._sources, map.sources);
gen._sourcesContent = map.sourcesContent || map.sources.map(() => null);
gen._mappings = traceMapping.decodedMappings(map);
return gen;
};
// Internal helpers
addSegmentInternal = (skipable, map, genLine, genColumn, source, sourceLine, sourceColumn, name, content) => {
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 = setArray.put(sources, source);
const namesIndex = name ? setArray.put(names, name) : NO_NAME;
if (sourcesIndex === sourcesContent.length)
sourcesContent[sourcesIndex] = content !== null && content !== void 0 ? content : 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 putAll(strarr, array) {
for (let i = 0; i < array.length; i++)
setArray.put(strarr, array[i]);
}
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, content } = mapping;
if (!source) {
return addSegmentInternal(skipable, map, generated.line - 1, generated.column, null, null, null, null, null);
}
const s = source;
return addSegmentInternal(skipable, map, generated.line - 1, generated.column, s, original.line - 1, original.column, name, content);
}
exports.GenMapping = GenMapping;
Object.defineProperty(exports, '__esModule', { value: true });
}));
//# sourceMappingURL=gen-mapping.umd.js.map