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276 lines
11 KiB
276 lines
11 KiB
"use strict"; |
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var to_ascii, to_base64; |
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if (typeof Buffer == "undefined") { |
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to_ascii = atob; |
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to_base64 = btoa; |
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} else if (typeof Buffer.alloc == "undefined") { |
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to_ascii = function(b64) { |
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return new Buffer(b64, "base64").toString(); |
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}; |
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to_base64 = function(str) { |
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return new Buffer(str).toString("base64"); |
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}; |
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} else { |
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to_ascii = function(b64) { |
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return Buffer.from(b64, "base64").toString(); |
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}; |
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to_base64 = function(str) { |
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return Buffer.from(str).toString("base64"); |
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}; |
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} |
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function read_source_map(name, toplevel) { |
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var comments = toplevel.end.comments_after; |
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for (var i = comments.length; --i >= 0;) { |
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var comment = comments[i]; |
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if (comment.type != "comment1") break; |
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var match = /^# ([^\s=]+)=(\S+)\s*$/.exec(comment.value); |
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if (!match) break; |
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if (match[1] == "sourceMappingURL") { |
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match = /^data:application\/json(;.*?)?;base64,([^,]+)$/.exec(match[2]); |
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if (!match) break; |
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return to_ascii(match[2]); |
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} |
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} |
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AST_Node.warn("inline source map not found: {name}", { |
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name: name, |
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}); |
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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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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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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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try { |
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options = defaults(options, { |
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annotations: undefined, |
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compress: {}, |
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enclose: false, |
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expression: false, |
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ie: false, |
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ie8: false, |
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keep_fargs: false, |
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keep_fnames: false, |
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mangle: {}, |
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module: false, |
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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: !!(options && options["module"]), |
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v8: false, |
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validate: false, |
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warnings: false, |
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webkit: false, |
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wrap: false, |
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}, true); |
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if (options.validate) AST_Node.enable_validation(); |
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var timings = options.timings && { start: Date.now() }; |
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if (options.annotations !== undefined) set_shorthand("annotations", options, [ "compress", "output" ]); |
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if (options.expression) set_shorthand("expression", options, [ "compress", "parse" ]); |
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if (options.ie8) options.ie = options.ie || options.ie8; |
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if (options.ie) set_shorthand("ie", options, [ "compress", "mangle", "output", "rename" ]); |
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if (options.keep_fargs) set_shorthand("keep_fargs", options, [ "compress", "mangle", "rename" ]); |
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if (options.keep_fnames) set_shorthand("keep_fnames", options, [ "compress", "mangle", "rename" ]); |
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if (options.module) set_shorthand("module", options, [ "compress", "parse" ]); |
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if (options.toplevel) set_shorthand("toplevel", options, [ "compress", "mangle", "rename" ]); |
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if (options.v8) set_shorthand("v8", options, [ "mangle", "output", "rename" ]); |
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if (options.webkit) set_shorthand("webkit", options, [ "compress", "mangle", "output", "rename" ]); |
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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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ie: false, |
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keep_fargs: 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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v8: false, |
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webkit: 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.rename === undefined) options.rename = options.compress && options.mangle; |
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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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names: true, |
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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.log_function(function(warning) { |
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warnings.push(warning); |
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}, options.warnings == "verbose"); |
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if (timings) timings.parse = Date.now(); |
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var toplevel; |
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options.parse = options.parse || {}; |
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if (files instanceof AST_Node) { |
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toplevel = files; |
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} else { |
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if (typeof files == "string") files = [ files ]; |
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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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if (source_map_content) options.sourceMap.orig = 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 = toplevel = parse(files[name], options.parse); |
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if (source_map_content == "inline") { |
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var inlined_content = read_source_map(name, toplevel); |
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if (inlined_content) options.sourceMap.orig[name] = parse_source_map(inlined_content); |
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} else if (source_map_content) { |
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options.sourceMap.orig[name] = source_map_content; |
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} |
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} |
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} |
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if (options.parse.expression) toplevel = toplevel.wrap_expression(); |
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if (quoted_props) reserve_quoted_keys(toplevel, quoted_props); |
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[ "enclose", "wrap" ].forEach(function(action) { |
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var option = options[action]; |
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if (!option) return; |
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var orig = toplevel.print_to_string().slice(0, -1); |
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toplevel = toplevel[action](option); |
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files[toplevel.start.file] = toplevel.print_to_string().replace(orig, ""); |
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}); |
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if (options.validate) toplevel.validate_ast(); |
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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.rename); |
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toplevel.expand_names(options.rename); |
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} |
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if (timings) timings.compress = Date.now(); |
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if (options.compress) { |
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toplevel = new Compressor(options.compress).compress(toplevel); |
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if (options.validate) toplevel.validate_ast(); |
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} |
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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 (quoted_props) reserve_quoted_keys(toplevel, quoted_props); |
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if (options.mangle && options.mangle.properties) mangle_properties(toplevel, options.mangle.properties); |
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if (options.parse.expression) toplevel = toplevel.unwrap_expression(); |
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if (timings) timings.output = Date.now(); |
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var result = {}; |
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var output = defaults(options.output, { |
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ast: false, |
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code: true, |
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}); |
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if (output.ast) result.ast = toplevel; |
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if (output.code) { |
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if (options.sourceMap) { |
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output.source_map = SourceMap(options.sourceMap); |
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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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output.source_map.setSourceContent(name, files[name]); |
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} |
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} |
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} |
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delete output.ast; |
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delete output.code; |
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var stream = OutputStream(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 = output.source_map.toString(); |
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var url = options.sourceMap.url; |
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if (url) { |
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result.code = result.code.replace(/\n\/\/# sourceMappingURL=\S+\s*$/, ""); |
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if (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 { |
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result.code += "\n//# sourceMappingURL=" + url; |
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} |
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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.log_function(); |
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AST_Node.disable_validation(); |
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} |
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}
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