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postcss

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Tool for transforming styles with JS plugins

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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 _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"); } } /** * Source map information from input CSS. * For example, source map after Sass compiler. * * This class will automatically find source map in input CSS or in file system * near input file (according `from` option). * * @example * const root = postcss.parse(css, { from: 'a.sass.css' }); * root.input.map //=> PreviousMap */ var PreviousMap = function () { /** * @param {string} css - input CSS source * @param {processOptions} [opts] - {@link Processor#process} options */ function PreviousMap(css, opts) { _classCallCheck(this, PreviousMap); this.loadAnnotation(css); /** * @member {boolean} - Was source map inlined by data-uri to input 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; } /** * Create a instance of `SourceMapGenerator` class * from the `source-map` library to work with source map information. * * It is lazy method, so it will create object only on first call * and then it will use cache. * * @return {SourceMapGenerator} object with source map information */ PreviousMap.prototype.consumer = function consumer() { if (!this.consumerCache) { this.consumerCache = new _sourceMap2.default.SourceMapConsumer(this.text); } return this.consumerCache; }; /** * Does source map contains `sourcesContent` with input source text. * * @return {boolean} Is `sourcesContent` present */ 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) { // data:application/json;charset=utf-8;base64, // data:application/json;charset=utf8;base64, // data:application/json;base64, var baseUri = /^data:application\/json;(?:charset=utf-?8;)?base64,/; var uri = 'data:application/json,'; if (this.startWith(text, uri)) { return decodeURIComponent(text.substr(uri.length)); } else if (baseUri.test(text)) { return new Buffer(text.substr(RegExp.lastMatch.length), 'base64').toString(); } 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 (typeof prev === 'function') { var prevPath = prev(file); if (prevPath && _fs2.default.existsSync && _fs2.default.existsSync(prevPath)) { return _fs2.default.readFileSync(prevPath, 'utf-8').toString().trim(); } else { throw new Error('Unable to load previous source map: ' + prevPath.toString()); } } 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 (this.isMap(prev)) { 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; } } }; PreviousMap.prototype.isMap = function isMap(map) { if ((typeof map === 'undefined' ? 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opts.map.prev : undefined;\n        let text = this.loadMap(opts.from, prev);\n        if ( text ) this.text = text;\n    }\n\n    /**\n     * Create a instance of `SourceMapGenerator` class\n     * from the `source-map` library to work with source map information.\n     *\n     * It is lazy method, so it will create object only on first call\n     * and then it will use cache.\n     *\n     * @return {SourceMapGenerator} object with source map information\n     */\n    consumer() {\n        if ( !this.consumerCache ) {\n            this.consumerCache = new mozilla.SourceMapConsumer(this.text);\n        }\n        return this.consumerCache;\n    }\n\n    /**\n     * Does source map contains `sourcesContent` with input source text.\n     *\n     * @return {boolean} Is `sourcesContent` present\n     */\n    withContent() {\n        return !!(this.consumer().sourcesContent &&\n                  this.consumer().sourcesContent.length > 0);\n    }\n\n    startWith(string, start) {\n        if ( !string ) return false;\n        return string.substr(0, start.length) === start;\n    }\n\n    loadAnnotation(css) {\n        let match = css.match(/\\/\\*\\s*# sourceMappingURL=(.*)\\s*\\*\\//);\n        if ( match ) this.annotation = match[1].trim();\n    }\n\n    decodeInline(text) {\n        // data:application/json;charset=utf-8;base64,\n        // data:application/json;charset=utf8;base64,\n        // data:application/json;base64,\n        let baseUri = /^data:application\\/json;(?:charset=utf-?8;)?base64,/;\n        let uri     = 'data:application/json,';\n\n        if ( this.startWith(text, uri) ) {\n            return decodeURIComponent( text.substr(uri.length) );\n\n        } else if ( baseUri.test(text) ) {\n            return new Buffer(text.substr(RegExp.lastMatch.length), 'base64')\n                .toString();\n\n        } else {\n            let encoding = text.match(/data:application\\/json;([^,]+),/)[1];\n            throw new Error('Unsupported source map encoding ' + encoding);\n        }\n    }\n\n    loadMap(file, prev) {\n        if ( prev === false ) return false;\n\n        if ( prev ) {\n            if ( typeof prev === 'string' ) {\n                return prev;\n            } else if ( typeof prev === 'function' ) {\n                let prevPath = prev(file);\n                if ( prevPath && fs.existsSync && fs.existsSync(prevPath) ) {\n                    return fs.readFileSync(prevPath, 'utf-8').toString().trim();\n                } else {\n                    throw new Error('Unable to load previous source map: ' +\n                    prevPath.toString());\n                }\n            } else if ( prev instanceof mozilla.SourceMapConsumer ) {\n                return mozilla.SourceMapGenerator\n                    .fromSourceMap(prev).toString();\n            } else if ( prev instanceof mozilla.SourceMapGenerator ) {\n                return prev.toString();\n            } else if ( this.isMap(prev) ) {\n                return JSON.stringify(prev);\n            } else {\n                throw new Error('Unsupported previous source map format: ' +\n                    prev.toString());\n            }\n\n        } else if ( this.inline ) {\n            return this.decodeInline(this.annotation);\n\n        } else if ( this.annotation ) {\n            let map = this.annotation;\n            if ( file ) map = path.join(path.dirname(file), map);\n\n            this.root = path.dirname(map);\n            if ( fs.existsSync && fs.existsSync(map) ) {\n                return fs.readFileSync(map, 'utf-8').toString().trim();\n            } else {\n                return false;\n            }\n        }\n    }\n\n    isMap(map) {\n        if ( typeof map !== 'object' ) return false;\n        return typeof map.mappings === 'string' ||\n               typeof map._mappings === 'string';\n    }\n}\n\nexport default PreviousMap;\n"]}