114 lines
2.7 KiB
JavaScript
Executable file
114 lines
2.7 KiB
JavaScript
Executable file
/*
|
|
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 streamChunks = require("./helpers/streamChunks");
|
|
const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
|
|
|
|
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);
|
|
}
|
|
|
|
streamChunks(options, onChunk, onSource, onName) {
|
|
const prefix = this._prefix;
|
|
const prefixOffset = prefix.length;
|
|
const linesOnly = !!(options && options.columns === false);
|
|
const { generatedLine, generatedColumn, source } = streamChunks(
|
|
this._source,
|
|
options,
|
|
(
|
|
chunk,
|
|
generatedLine,
|
|
generatedColumn,
|
|
sourceIndex,
|
|
originalLine,
|
|
originalColumn,
|
|
nameIndex
|
|
) => {
|
|
if (generatedColumn !== 0) {
|
|
// In the middle of the line, we just adject the column
|
|
generatedColumn += prefixOffset;
|
|
} else if (chunk !== undefined) {
|
|
// At the start of the line, when we have source content
|
|
// add the prefix as generated mapping
|
|
// (in lines only mode we just add it to the original mapping
|
|
// for performance reasons)
|
|
if (linesOnly || sourceIndex < 0) {
|
|
chunk = prefix + chunk;
|
|
} else if (prefixOffset > 0) {
|
|
onChunk(prefix, generatedLine, generatedColumn, -1, -1, -1, -1);
|
|
generatedColumn += prefixOffset;
|
|
}
|
|
} else if (!linesOnly) {
|
|
// Without source content, we only need to adject the column info
|
|
// expect in lines only mode where prefix is added to original mapping
|
|
generatedColumn += prefixOffset;
|
|
}
|
|
onChunk(
|
|
chunk,
|
|
generatedLine,
|
|
generatedColumn,
|
|
sourceIndex,
|
|
originalLine,
|
|
originalColumn,
|
|
nameIndex
|
|
);
|
|
},
|
|
onSource,
|
|
onName
|
|
);
|
|
return {
|
|
generatedLine,
|
|
generatedColumn:
|
|
generatedColumn === 0 ? 0 : prefixOffset + generatedColumn,
|
|
source:
|
|
source !== undefined
|
|
? prefix + source.replace(REPLACE_REGEX, "\n" + prefix)
|
|
: undefined
|
|
};
|
|
}
|
|
|
|
updateHash(hash) {
|
|
hash.update("PrefixSource");
|
|
this._source.updateHash(hash);
|
|
hash.update(this._prefix);
|
|
}
|
|
}
|
|
|
|
module.exports = PrefixSource;
|