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'use strict';
var SourceMapGenerator = require('source-map').SourceMapGenerator;
var SourceMapConsumer = require('source-map').SourceMapConsumer;
function unixStylePath(filePath) {
return filePath.replace(/\\/g, '/');
}
function Concat(generateSourceMap, fileName, separator) {
this.lineOffset = 0;
this.columnOffset = 0;
this.sourceMapping = generateSourceMap;
this.contentParts = [];
if (separator === undefined) {
this.separator = bufferFrom('');
} else {
this.separator = bufferFrom(separator);
}
if (this.sourceMapping) {
this._sourceMap = new SourceMapGenerator({file: unixStylePath(fileName)});
this.separatorLineOffset = 0;
this.separatorColumnOffset = 0;
var separatorString = this.separator.toString();
for (var i = 0; i < separatorString.length; i++) {
this.separatorColumnOffset++;
if (separatorString[i] === '\n') {
this.separatorLineOffset++;
this.separatorColumnOffset = 0;
}
}
}
}
Concat.prototype.add = function(filePath, content, sourceMap) {
filePath = filePath && unixStylePath(filePath);
if (!Buffer.isBuffer(content)) {
content = bufferFrom(content);
}
if (this.contentParts.length !== 0) {
this.contentParts.push(this.separator);
}
this.contentParts.push(content);
if (this.sourceMapping) {
var contentString = content.toString();
var lines = contentString.split('\n').length;
if (Object.prototype.toString.call(sourceMap) === '[object String]')
sourceMap = JSON.parse(sourceMap);
if (sourceMap && sourceMap.mappings && sourceMap.mappings.length > 0) {
var upstreamSM = new SourceMapConsumer(sourceMap);
var _this = this;
upstreamSM.eachMapping(function(mapping) {
if (mapping.source) {
_this._sourceMap.addMapping({
generated: {
line: _this.lineOffset + mapping.generatedLine,
column: (mapping.generatedLine === 1 ? _this.columnOffset : 0) + mapping.generatedColumn
},
original: mapping.originalLine == null ? null : {
line: mapping.originalLine,
column: mapping.originalColumn
},
source: mapping.originalLine != null ? mapping.source : null,
name: mapping.name
});
}
});
if (upstreamSM.sourcesContent) {
upstreamSM.sourcesContent.forEach(function(sourceContent, i) {
_this._sourceMap.setSourceContent(upstreamSM.sources[i], sourceContent);
});
}
} else {
if (sourceMap && sourceMap.sources && sourceMap.sources.length > 0)
filePath = sourceMap.sources[0];
if (filePath) {
for (var i = 1; i <= lines; i++) {
this._sourceMap.addMapping({
generated: {
line: this.lineOffset + i,
column: (i === 1 ? this.columnOffset : 0)
},
original: {
line: i,
column: 0
},
source: filePath
});
}
if (sourceMap && sourceMap.sourcesContent)
this._sourceMap.setSourceContent(filePath, sourceMap.sourcesContent[0]);
}
}
if (lines > 1)
this.columnOffset = 0;
if (this.separatorLineOffset === 0)
this.columnOffset += contentString.length - Math.max(0, contentString.lastIndexOf('\n')+1);
this.columnOffset += this.separatorColumnOffset;
this.lineOffset += lines - 1 + this.separatorLineOffset;
}
};
Object.defineProperty(Concat.prototype, 'content', {
get: function content() {
return Buffer.concat(this.contentParts);
}
});
Object.defineProperty(Concat.prototype, 'sourceMap', {
get: function sourceMap() {
return this._sourceMap ? this._sourceMap.toString() : undefined;
}
});
function bufferFrom(content) {
try {
return Buffer.from(content);
} catch(e) {
if (Object.prototype.toString.call(content) !== '[object String]') {
throw new TypeError("separator must be a string");
}
return new Buffer(content);
}
}
Concat.bufferFrom = bufferFrom;
Concat.default = Concat;
module.exports = Concat;
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