149 lines
4.9 KiB
JavaScript
149 lines
4.9 KiB
JavaScript
/***********************************************************************
|
|
|
|
A JavaScript tokenizer / parser / beautifier / compressor.
|
|
https://github.com/mishoo/UglifyJS2
|
|
|
|
-------------------------------- (C) ---------------------------------
|
|
|
|
Author: Mihai Bazon
|
|
<mihai.bazon@gmail.com>
|
|
http://mihai.bazon.net/blog
|
|
|
|
Distributed under the BSD license:
|
|
|
|
Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above
|
|
copyright notice, this list of conditions and the following
|
|
disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above
|
|
copyright notice, this list of conditions and the following
|
|
disclaimer in the documentation and/or other materials
|
|
provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
|
|
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
|
|
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
SUCH DAMAGE.
|
|
|
|
***********************************************************************/
|
|
|
|
"use strict";
|
|
|
|
import {SourceMapConsumer, SourceMapGenerator} from "@jridgewell/source-map";
|
|
import {defaults, HOP} from "./utils/index.js";
|
|
|
|
// a small wrapper around source-map and @jridgewell/source-map
|
|
async function SourceMap(options) {
|
|
options = defaults(options, {
|
|
file : null,
|
|
root : null,
|
|
orig : null,
|
|
files: {},
|
|
});
|
|
|
|
var orig_map;
|
|
var generator = new SourceMapGenerator({
|
|
file : options.file,
|
|
sourceRoot : options.root
|
|
});
|
|
|
|
let sourcesContent = {__proto__: null};
|
|
let files = options.files;
|
|
for (var name in files) if (HOP(files, name)) {
|
|
sourcesContent[name] = files[name];
|
|
}
|
|
if (options.orig) {
|
|
// We support both @jridgewell/source-map (which has a sync
|
|
// SourceMapConsumer) and source-map (which has an async
|
|
// SourceMapConsumer).
|
|
orig_map = await new SourceMapConsumer(options.orig);
|
|
if (orig_map.sourcesContent) {
|
|
orig_map.sources.forEach(function(source, i) {
|
|
var content = orig_map.sourcesContent[i];
|
|
if (content) {
|
|
sourcesContent[source] = content;
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
function add(source, gen_line, gen_col, orig_line, orig_col, name) {
|
|
let generatedPos = { line: gen_line, column: gen_col };
|
|
|
|
if (orig_map) {
|
|
var info = orig_map.originalPositionFor({
|
|
line: orig_line,
|
|
column: orig_col
|
|
});
|
|
if (info.source === null) {
|
|
generator.addMapping({
|
|
generated: generatedPos,
|
|
original: null,
|
|
source: null,
|
|
name: null
|
|
});
|
|
return;
|
|
}
|
|
source = info.source;
|
|
orig_line = info.line;
|
|
orig_col = info.column;
|
|
name = info.name || name;
|
|
}
|
|
generator.addMapping({
|
|
generated : generatedPos,
|
|
original : { line: orig_line, column: orig_col },
|
|
source : source,
|
|
name : name
|
|
});
|
|
generator.setSourceContent(source, sourcesContent[source]);
|
|
}
|
|
|
|
function clean(map) {
|
|
const allNull = map.sourcesContent && map.sourcesContent.every(c => c == null);
|
|
if (allNull) delete map.sourcesContent;
|
|
if (map.file === undefined) delete map.file;
|
|
if (map.sourceRoot === undefined) delete map.sourceRoot;
|
|
return map;
|
|
}
|
|
|
|
function getDecoded() {
|
|
if (!generator.toDecodedMap) return null;
|
|
return clean(generator.toDecodedMap());
|
|
}
|
|
|
|
function getEncoded() {
|
|
return clean(generator.toJSON());
|
|
}
|
|
|
|
function destroy() {
|
|
// @jridgewell/source-map's SourceMapConsumer does not need to be
|
|
// manually freed.
|
|
if (orig_map && orig_map.destroy) orig_map.destroy();
|
|
}
|
|
|
|
return {
|
|
add,
|
|
getDecoded,
|
|
getEncoded,
|
|
destroy,
|
|
};
|
|
}
|
|
|
|
export {
|
|
SourceMap,
|
|
};
|