mirror of https://github.com/jkjoy/sunpeiwen.git
67 lines
1.4 KiB
JavaScript
67 lines
1.4 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const Source = require("./Source");
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class CompatSource extends Source {
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static from(sourceLike) {
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return sourceLike instanceof Source
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? sourceLike
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: new CompatSource(sourceLike);
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}
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constructor(sourceLike) {
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super();
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this._sourceLike = sourceLike;
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}
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source() {
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return this._sourceLike.source();
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}
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buffer() {
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if (typeof this._sourceLike.buffer === "function") {
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return this._sourceLike.buffer();
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}
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return super.buffer();
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}
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size() {
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if (typeof this._sourceLike.size === "function") {
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return this._sourceLike.size();
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}
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return super.size();
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}
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map(options) {
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if (typeof this._sourceLike.map === "function") {
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return this._sourceLike.map(options);
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}
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return super.map(options);
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}
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sourceAndMap(options) {
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if (typeof this._sourceLike.sourceAndMap === "function") {
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return this._sourceLike.sourceAndMap(options);
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}
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return super.sourceAndMap(options);
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}
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updateHash(hash) {
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if (typeof this._sourceLike.updateHash === "function") {
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return this._sourceLike.updateHash(hash);
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}
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if (typeof this._sourceLike.map === "function") {
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throw new Error(
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"A Source-like object with a 'map' method must also provide an 'updateHash' method"
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);
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}
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hash.update(this.buffer());
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}
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}
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module.exports = CompatSource;
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