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