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