/*

MIT License http://www.opensource.org/licenses/mit-license.php

Author Tobias Koppers @sokra

*/

var Source = require("webpack-core/lib/Source");

function ReplaceSource(source) {

Source.call(this);

this._source = source;

this.replacements = [];

}

module.exports = ReplaceSource;

ReplaceSource.prototype = Object.create(Source.prototype);

ReplaceSource.prototype.replace = function(start, end, newValue) {

this.replacements.push([start, end, newValue]);

};

ReplaceSource.prototype.insert = function(pos, newValue) {

this.replacements.push([pos, pos-1, newValue]);

};

ReplaceSource.prototype._bake = function() {

this.replacements.sort(function(a, b) {

return b[0] - a[0];

});

var result = [this._source.source()];

this.replacements.forEach(function(repl) {

var remSource = result.pop();

result.push(

remSource.substr(repl[1]+1),

repl[2],

remSource.substr(0, repl[0])

);

});

result = result.reverse().join("");

return {

source: result

}

};