aaac7fed
 liuqimichale
add
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'use strict';
exports.__esModule = true;
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
var _jsBase = require('js-base64');
var _sourceMap = require('source-map');
var _sourceMap2 = _interopRequireDefault(_sourceMap);
var _path = require('path');
var _path2 = _interopRequireDefault(_path);
var _fs = require('fs');
var _fs2 = _interopRequireDefault(_fs);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var PreviousMap = function () {
function PreviousMap(css, opts) {
_classCallCheck(this, PreviousMap);
this.loadAnnotation(css);
this.inline = this.startWith(this.annotation, 'data:');
var prev = opts.map ? opts.map.prev : undefined;
var text = this.loadMap(opts.from, prev);
if (text) this.text = text;
}
PreviousMap.prototype.consumer = function consumer() {
if (!this.consumerCache) {
this.consumerCache = new _sourceMap2.default.SourceMapConsumer(this.text);
}
return this.consumerCache;
};
PreviousMap.prototype.withContent = function withContent() {
return !!(this.consumer().sourcesContent && this.consumer().sourcesContent.length > 0);
};
PreviousMap.prototype.startWith = function startWith(string, start) {
if (!string) return false;
return string.substr(0, start.length) === start;
};
PreviousMap.prototype.loadAnnotation = function loadAnnotation(css) {
var match = css.match(/\/\*\s*# sourceMappingURL=(.*)\s*\*\//);
if (match) this.annotation = match[1].trim();
};
PreviousMap.prototype.decodeInline = function decodeInline(text) {
var uri = 'data:application/json,';
var base64 = 'data:application/json;base64,';
if (this.startWith(text, uri)) {
return decodeURIComponent(text.substr(uri.length));
} else if (this.startWith(text, base64)) {
return _jsBase.Base64.decode(text.substr(base64.length));
} else {
var encoding = text.match(/data:application\/json;([^,]+),/)[1];
throw new Error('Unsupported source map encoding ' + encoding);
}
};
PreviousMap.prototype.loadMap = function loadMap(file, prev) {
if (prev === false) return false;
if (prev) {
if (typeof prev === 'string') {
return prev;
} else if (prev instanceof _sourceMap2.default.SourceMapConsumer) {
return _sourceMap2.default.SourceMapGenerator.fromSourceMap(prev).toString();
} else if (prev instanceof _sourceMap2.default.SourceMapGenerator) {
return prev.toString();
} else if ((typeof prev === 'undefined' ? 'undefined' : _typeof(prev)) === 'object' && prev.mappings) {
return JSON.stringify(prev);
} else {
throw new Error('Unsupported previous source map format: ' + prev.toString());
}
} else if (this.inline) {
return this.decodeInline(this.annotation);
} else if (this.annotation) {
var map = this.annotation;
if (file) map = _path2.default.join(_path2.default.dirname(file), map);
this.root = _path2.default.dirname(map);
if (_fs2.default.existsSync && _fs2.default.existsSync(map)) {
return _fs2.default.readFileSync(map, 'utf-8').toString().trim();
} else {
return false;
}
}
};
return PreviousMap;
}();
exports.default = PreviousMap;
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