diff options
Diffstat (limited to 'node_modules/uglify-js/lib/minify.js')
| -rw-r--r-- | node_modules/uglify-js/lib/minify.js | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/node_modules/uglify-js/lib/minify.js b/node_modules/uglify-js/lib/minify.js new file mode 100644 index 00000000..d84f6825 --- /dev/null +++ b/node_modules/uglify-js/lib/minify.js @@ -0,0 +1,246 @@ +"use strict"; + +var to_ascii = typeof atob == "undefined" ? function(b64) { + return new Buffer(b64, "base64").toString(); +} : atob; +var to_base64 = typeof btoa == "undefined" ? function(str) { + return new Buffer(str).toString("base64"); +} : btoa; + +function read_source_map(name, code) { + var match = /\n\/\/# sourceMappingURL=data:application\/json(;.*?)?;base64,(.*)/.exec(code); + if (!match) { + AST_Node.warn("inline source map not found: " + name); + return null; + } + return to_ascii(match[2]); +} + +function parse_source_map(content) { + try { + return JSON.parse(content); + } catch (ex) { + throw new Error("invalid input source map: " + content); + } +} + +function set_shorthand(name, options, keys) { + if (options[name]) { + keys.forEach(function(key) { + if (options[key]) { + if (typeof options[key] != "object") options[key] = {}; + if (!(name in options[key])) options[key][name] = options[name]; + } + }); + } +} + +function init_cache(cache) { + if (!cache) return; + if (!("props" in cache)) { + cache.props = new Dictionary(); + } else if (!(cache.props instanceof Dictionary)) { + cache.props = Dictionary.fromObject(cache.props); + } +} + +function to_json(cache) { + return { + props: cache.props.toObject() + }; +} + +function minify(files, options) { + var warn_function = AST_Node.warn_function; + try { + options = defaults(options, { + compress: {}, + enclose: false, + ie8: false, + keep_fnames: false, + mangle: {}, + nameCache: null, + output: {}, + parse: {}, + rename: undefined, + sourceMap: false, + timings: false, + toplevel: false, + warnings: false, + wrap: false, + }, true); + var timings = options.timings && { + start: Date.now() + }; + if (options.rename === undefined) { + options.rename = options.compress && options.mangle; + } + set_shorthand("ie8", options, [ "compress", "mangle", "output" ]); + set_shorthand("keep_fnames", options, [ "compress", "mangle" ]); + set_shorthand("toplevel", options, [ "compress", "mangle" ]); + set_shorthand("warnings", options, [ "compress" ]); + var quoted_props; + if (options.mangle) { + options.mangle = defaults(options.mangle, { + cache: options.nameCache && (options.nameCache.vars || {}), + eval: false, + ie8: false, + keep_fnames: false, + properties: false, + reserved: [], + toplevel: false, + }, true); + if (options.mangle.properties) { + if (typeof options.mangle.properties != "object") { + options.mangle.properties = {}; + } + if (options.mangle.properties.keep_quoted) { + quoted_props = options.mangle.properties.reserved; + if (!Array.isArray(quoted_props)) quoted_props = []; + options.mangle.properties.reserved = quoted_props; + } + if (options.nameCache && !("cache" in options.mangle.properties)) { + options.mangle.properties.cache = options.nameCache.props || {}; + } + } + init_cache(options.mangle.cache); + init_cache(options.mangle.properties.cache); + } + if (options.sourceMap) { + options.sourceMap = defaults(options.sourceMap, { + content: null, + filename: null, + includeSources: false, + root: null, + url: null, + }, true); + } + var warnings = []; + if (options.warnings && !AST_Node.warn_function) { + AST_Node.warn_function = function(warning) { + warnings.push(warning); + }; + } + if (timings) timings.parse = Date.now(); + var source_maps, toplevel; + if (files instanceof AST_Toplevel) { + toplevel = files; + } else { + if (typeof files == "string") { + files = [ files ]; + } + options.parse = options.parse || {}; + options.parse.toplevel = null; + var source_map_content = options.sourceMap && options.sourceMap.content; + if (typeof source_map_content == "string" && source_map_content != "inline") { + source_map_content = parse_source_map(source_map_content); + } + source_maps = source_map_content && Object.create(null); + for (var name in files) if (HOP(files, name)) { + options.parse.filename = name; + options.parse.toplevel = parse(files[name], options.parse); + if (source_maps) { + if (source_map_content == "inline") { + var inlined_content = read_source_map(name, files[name]); + if (inlined_content) { + source_maps[name] = parse_source_map(inlined_content); + } + } else { + source_maps[name] = source_map_content; + } + } + } + toplevel = options.parse.toplevel; + } + if (quoted_props) { + reserve_quoted_keys(toplevel, quoted_props); + } + if (options.wrap) { + toplevel = toplevel.wrap_commonjs(options.wrap); + } + if (options.enclose) { + toplevel = toplevel.wrap_enclose(options.enclose); + } + if (timings) timings.rename = Date.now(); + if (options.rename) { + toplevel.figure_out_scope(options.mangle); + toplevel.expand_names(options.mangle); + } + if (timings) timings.compress = Date.now(); + if (options.compress) toplevel = new Compressor(options.compress).compress(toplevel); + if (timings) timings.scope = Date.now(); + if (options.mangle) toplevel.figure_out_scope(options.mangle); + if (timings) timings.mangle = Date.now(); + if (options.mangle) { + toplevel.compute_char_frequency(options.mangle); + toplevel.mangle_names(options.mangle); + } + if (timings) timings.properties = Date.now(); + if (options.mangle && options.mangle.properties) { + toplevel = mangle_properties(toplevel, options.mangle.properties); + } + if (timings) timings.output = Date.now(); + var result = {}; + if (options.output.ast) { + result.ast = toplevel; + } + if (!HOP(options.output, "code") || options.output.code) { + if (options.sourceMap) { + options.output.source_map = SourceMap({ + file: options.sourceMap.filename, + orig: source_maps, + root: options.sourceMap.root + }); + if (options.sourceMap.includeSources) { + if (files instanceof AST_Toplevel) { + throw new Error("original source content unavailable"); + } else for (var name in files) if (HOP(files, name)) { + options.output.source_map.get().setSourceContent(name, files[name]); + } + } else { + options.output.source_map.get()._sourcesContents = null; + } + } + delete options.output.ast; + delete options.output.code; + var stream = OutputStream(options.output); + toplevel.print(stream); + result.code = stream.get(); + if (options.sourceMap) { + result.map = options.output.source_map.toString(); + if (options.sourceMap.url == "inline") { + result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(result.map); + } else if (options.sourceMap.url) { + result.code += "\n//# sourceMappingURL=" + options.sourceMap.url; + } + } + } + if (options.nameCache && options.mangle) { + if (options.mangle.cache) options.nameCache.vars = to_json(options.mangle.cache); + if (options.mangle.properties && options.mangle.properties.cache) { + options.nameCache.props = to_json(options.mangle.properties.cache); + } + } + if (timings) { + timings.end = Date.now(); + result.timings = { + parse: 1e-3 * (timings.rename - timings.parse), + rename: 1e-3 * (timings.compress - timings.rename), + compress: 1e-3 * (timings.scope - timings.compress), + scope: 1e-3 * (timings.mangle - timings.scope), + mangle: 1e-3 * (timings.properties - timings.mangle), + properties: 1e-3 * (timings.output - timings.properties), + output: 1e-3 * (timings.end - timings.output), + total: 1e-3 * (timings.end - timings.start) + } + } + if (warnings.length) { + result.warnings = warnings; + } + return result; + } catch (ex) { + return { error: ex }; + } finally { + AST_Node.warn_function = warn_function; + } +} |