source: trip-planner-front/node_modules/webpack-sources/lib/PrefixSource.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/
"use strict";

var Source = require("./Source");
var SourceNode = require("source-map").SourceNode;

var REPLACE_REGEX = /\n(?=.|\s)/g;

function cloneAndPrefix(node, prefix, append) {
        if(typeof node === "string") {
                var result = node.replace(REPLACE_REGEX, "\n" + prefix);
                if(append.length > 0) result = append.pop() + result;
                if(/\n$/.test(node)) append.push(prefix);
                return result;
        } else {
                var newNode = new SourceNode(
                        node.line,
                        node.column,
                        node.source,
                        node.children.map(function(node) {
                                return cloneAndPrefix(node, prefix, append);
                        }),
                        node.name
                );
                newNode.sourceContents = node.sourceContents;
                return newNode;
        }
};

class PrefixSource extends Source {
        constructor(prefix, source) {
                super();
                this._source = source;
                this._prefix = prefix;
        }

        source() {
                var node = typeof this._source === "string" ? this._source : this._source.source();
                var prefix = this._prefix;
                return prefix + node.replace(REPLACE_REGEX, "\n" + prefix);
        }

        node(options) {
                var node = this._source.node(options);
                var prefix = this._prefix;
                var output = [];
                var result = new SourceNode();
                node.walkSourceContents(function(source, content) {
                        result.setSourceContent(source, content);
                });
                var needPrefix = true;
                node.walk(function(chunk, mapping) {
                        var parts = chunk.split(/(\n)/);
                        for(var i = 0; i < parts.length; i += 2) {
                                var nl = i + 1 < parts.length;
                                var 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) {
                var prefix = this._prefix;
                var map = this._source.listMap(options);
                return map.mapGeneratedCode(function(code) {
                        return prefix + code.replace(REPLACE_REGEX, "\n" + prefix);
                });
        }

        updateHash(hash) {
                if(typeof this._source === "string")
                        hash.update(this._source);
                else
                        this._source.updateHash(hash);
                if(typeof this._prefix === "string")
                        hash.update(this._prefix);
                else
                        this._prefix.updateHash(hash);
        }
}

require("./SourceAndMapMixin")(PrefixSource.prototype);

module.exports = PrefixSource;