81 lines
2.0 KiB
JavaScript
81 lines
2.0 KiB
JavaScript
|
/*
|
||
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
||
|
|
Author Tobias Koppers @sokra
|
||
|
|
*/
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const Source = require("./Source");
|
||
|
|
|
||
|
|
class CachedSource extends Source {
|
||
|
|
constructor(source) {
|
||
|
|
super();
|
||
|
|
this._source = source;
|
||
|
|
this._cachedSource = undefined;
|
||
|
|
this._cachedSize = undefined;
|
||
|
|
this._cachedMaps = {};
|
||
|
|
|
||
|
|
if(source.node) this.node = function(options) {
|
||
|
|
return this._source.node(options);
|
||
|
|
};
|
||
|
|
|
||
|
|
if(source.listMap) this.listMap = function(options) {
|
||
|
|
return this._source.listMap(options);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
source() {
|
||
|
|
if(typeof this._cachedSource !== "undefined") return this._cachedSource;
|
||
|
|
return this._cachedSource = this._source.source();
|
||
|
|
}
|
||
|
|
|
||
|
|
size() {
|
||
|
|
if(typeof this._cachedSize !== "undefined") return this._cachedSize;
|
||
|
|
if(typeof this._cachedSource !== "undefined") {
|
||
|
|
if(Buffer.from.length === 1) return new Buffer(this._cachedSource).length;
|
||
|
|
return this._cachedSize = Buffer.byteLength(this._cachedSource);
|
||
|
|
}
|
||
|
|
return this._cachedSize = this._source.size();
|
||
|
|
}
|
||
|
|
|
||
|
|
sourceAndMap(options) {
|
||
|
|
const key = JSON.stringify(options);
|
||
|
|
if(typeof this._cachedSource !== "undefined" && key in this._cachedMaps)
|
||
|
|
return {
|
||
|
|
source: this._cachedSource,
|
||
|
|
map: this._cachedMaps[key]
|
||
|
|
};
|
||
|
|
else if(typeof this._cachedSource !== "undefined") {
|
||
|
|
return {
|
||
|
|
source: this._cachedSource,
|
||
|
|
map: this._cachedMaps[key] = this._source.map(options)
|
||
|
|
};
|
||
|
|
} else if(key in this._cachedMaps) {
|
||
|
|
return {
|
||
|
|
source: this._cachedSource = this._source.source(),
|
||
|
|
map: this._cachedMaps[key]
|
||
|
|
};
|
||
|
|
}
|
||
|
|
const result = this._source.sourceAndMap(options);
|
||
|
|
this._cachedSource = result.source;
|
||
|
|
this._cachedMaps[key] = result.map;
|
||
|
|
return {
|
||
|
|
source: this._cachedSource,
|
||
|
|
map: this._cachedMaps[key]
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
map(options) {
|
||
|
|
if(!options) options = {};
|
||
|
|
const key = JSON.stringify(options);
|
||
|
|
if(key in this._cachedMaps)
|
||
|
|
return this._cachedMaps[key];
|
||
|
|
return this._cachedMaps[key] = this._source.map();
|
||
|
|
}
|
||
|
|
|
||
|
|
updateHash(hash) {
|
||
|
|
this._source.updateHash(hash);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = CachedSource;
|