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rOACCT/node_modules/webpack-sources/lib/PrefixSource.js
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PrefixSource.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Source = require("./Source");
const RawSource = require("./RawSource");
const { SourceNode } = require("source-map");
const { getSourceAndMap, getMap } = require("./helpers");
const REPLACE_REGEX = /\n(?=.|\s)/g;
class PrefixSource extends Source {
constructor(prefix, source) {
super();
this._source =
typeof source === "string" || Buffer.isBuffer(source)
? new RawSource(source, true)
: source;
this._prefix = prefix;
}
getPrefix() {
return this._prefix;
}
original() {
return this._source;
}
source() {
const node = this._source.source();
const prefix = this._prefix;
return prefix + node.replace(REPLACE_REGEX, "\n" + prefix);
}
// TODO efficient buffer() implementation
map(options) {
return getMap(this, options);
}
sourceAndMap(options) {
return getSourceAndMap(this, options);
}
node(options) {
const node = this._source.node(options);
const prefix = this._prefix;
const output = [];
const result = new SourceNode();
node.walkSourceContents(function (source, content) {
result.setSourceContent(source, content);
});
let needPrefix = true;
node.walk(function (chunk, mapping) {
const parts = chunk.split(/(\n)/);
for (let i = 0; i < parts.length; i += 2) {
const nl = i + 1 < parts.length;
const part = parts[i] + (nl ? "\n" : "");
if (part) {
if (needPrefix) {
output.push(prefix);
}
output.push(
new SourceNode(
mapping.line,
mapping.column,
mapping.source,
part,
mapping.name
)
);
needPrefix = nl;
}
}
});
result.add(output);
return result;
}
listMap(options) {
const prefix = this._prefix;
const map = this._source.listMap(options);
let prefixNextLine = true;
return map.mapGeneratedCode(function (code) {
let updatedCode = code.replace(REPLACE_REGEX, "\n" + prefix);
if (prefixNextLine) updatedCode = prefix + updatedCode;
prefixNextLine = code.charCodeAt(code.length - 1) === 10; // === /\n$/.test(code)
return updatedCode;
});
}
updateHash(hash) {
hash.update("PrefixSource");
this._source.updateHash(hash);
hash.update(this._prefix);
}
}
module.exports = PrefixSource;
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