324 lines
10 KiB
JavaScript
324 lines
10 KiB
JavaScript
'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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var defs = {};
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defs[name] = options[name];
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options[key] = defaults(options[key], defs);
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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(
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options,
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{
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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: undefined,
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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:
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options && !options['expression'] && options['module'] ?
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true
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: undefined,
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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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},
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true
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);
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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)
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set_shorthand('annotations', options, ['compress', 'output']);
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if (options.expression)
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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)
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set_shorthand('ie', options, ['compress', 'mangle', 'output', 'rename']);
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if (options.keep_fargs)
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set_shorthand('keep_fargs', options, ['compress', 'mangle', 'rename']);
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if (options.keep_fnames)
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set_shorthand('keep_fnames', options, ['compress', 'mangle', 'rename']);
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if (options.module === undefined && !options.ie) options.module = true;
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if (options.module)
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set_shorthand('module', options, ['compress', 'output', 'parse']);
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if (options.toplevel !== undefined)
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set_shorthand('toplevel', options, ['compress', 'mangle', 'rename']);
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if (options.v8)
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set_shorthand('v8', options, ['mangle', 'output', 'rename']);
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if (options.webkit)
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set_shorthand('webkit', options, [
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'compress',
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'mangle',
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'output',
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'rename',
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]);
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var quoted_props;
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if (options.mangle) {
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options.mangle = defaults(
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options.mangle,
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{
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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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},
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true
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);
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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)
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options.rename = options.compress && options.mangle;
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if (options.sourceMap) {
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options.sourceMap = defaults(
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options.sourceMap,
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{
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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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},
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true
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);
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}
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var warnings = [];
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if (options.warnings)
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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 (
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typeof source_map_content == 'string' &&
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source_map_content != 'inline'
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) {
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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)
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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)
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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)
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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
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for (var name in files)
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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(
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/\n\/\/# sourceMappingURL=\S+\s*$/,
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''
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);
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if (url == 'inline') {
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result.code +=
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'\n//# sourceMappingURL=data:application/json;charset=utf-8;base64,' +
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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)
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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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