1 | "use strict";
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2 |
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3 |
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4 | import {
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5 | defaults,
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6 | map_from_object,
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7 | map_to_object,
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8 | HOP,
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9 | } from "./utils/index.js";
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10 | import { AST_Toplevel } from "./ast.js";
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11 | import { parse } from "./parse.js";
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12 | import { OutputStream } from "./output.js";
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13 | import { Compressor } from "./compress/index.js";
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14 | import { base54 } from "./scope.js";
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15 | import { SourceMap } from "./sourcemap.js";
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16 | import {
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17 | mangle_properties,
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18 | reserve_quoted_keys,
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19 | } from "./propmangle.js";
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20 |
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21 | var to_ascii = typeof atob == "undefined" ? function(b64) {
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22 | return Buffer.from(b64, "base64").toString();
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23 | } : atob;
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24 | var to_base64 = typeof btoa == "undefined" ? function(str) {
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25 | return Buffer.from(str).toString("base64");
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26 | } : btoa;
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27 |
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28 | function read_source_map(code) {
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29 | var match = /(?:^|[^.])\/\/# sourceMappingURL=data:application\/json(;[\w=-]*)?;base64,([+/0-9A-Za-z]*=*)\s*$/.exec(code);
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30 | if (!match) {
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31 | console.warn("inline source map not found");
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32 | return null;
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33 | }
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34 | return to_ascii(match[2]);
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35 | }
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36 |
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37 | function set_shorthand(name, options, keys) {
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38 | if (options[name]) {
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39 | keys.forEach(function(key) {
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40 | if (options[key]) {
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41 | if (typeof options[key] != "object") options[key] = {};
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42 | if (!(name in options[key])) options[key][name] = options[name];
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43 | }
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44 | });
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45 | }
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46 | }
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47 |
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48 | function init_cache(cache) {
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49 | if (!cache) return;
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50 | if (!("props" in cache)) {
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51 | cache.props = new Map();
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52 | } else if (!(cache.props instanceof Map)) {
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53 | cache.props = map_from_object(cache.props);
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54 | }
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55 | }
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56 |
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57 | function cache_to_json(cache) {
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58 | return {
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59 | props: map_to_object(cache.props)
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60 | };
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61 | }
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62 |
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63 | async function minify(files, options) {
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64 | options = defaults(options, {
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65 | compress: {},
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66 | ecma: undefined,
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67 | enclose: false,
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68 | ie8: false,
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69 | keep_classnames: undefined,
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70 | keep_fnames: false,
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71 | mangle: {},
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72 | module: false,
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73 | nameCache: null,
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74 | output: null,
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75 | format: null,
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76 | parse: {},
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77 | rename: undefined,
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78 | safari10: false,
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79 | sourceMap: false,
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80 | timings: false,
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81 | toplevel: false,
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82 | warnings: false,
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83 | wrap: false,
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84 | }, true);
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85 | var timings = options.timings && {
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86 | start: Date.now()
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87 | };
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88 | if (options.keep_classnames === undefined) {
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89 | options.keep_classnames = options.keep_fnames;
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90 | }
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91 | if (options.rename === undefined) {
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92 | options.rename = options.compress && options.mangle;
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93 | }
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94 | if (options.output && options.format) {
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95 | throw new Error("Please only specify either output or format option, preferrably format.");
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96 | }
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97 | options.format = options.format || options.output || {};
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98 | set_shorthand("ecma", options, [ "parse", "compress", "format" ]);
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99 | set_shorthand("ie8", options, [ "compress", "mangle", "format" ]);
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100 | set_shorthand("keep_classnames", options, [ "compress", "mangle" ]);
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101 | set_shorthand("keep_fnames", options, [ "compress", "mangle" ]);
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102 | set_shorthand("module", options, [ "parse", "compress", "mangle" ]);
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103 | set_shorthand("safari10", options, [ "mangle", "format" ]);
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104 | set_shorthand("toplevel", options, [ "compress", "mangle" ]);
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105 | set_shorthand("warnings", options, [ "compress" ]);
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106 | var quoted_props;
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107 | if (options.mangle) {
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108 | options.mangle = defaults(options.mangle, {
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109 | cache: options.nameCache && (options.nameCache.vars || {}),
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110 | eval: false,
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111 | ie8: false,
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112 | keep_classnames: false,
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113 | keep_fnames: false,
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114 | module: false,
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115 | properties: false,
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116 | reserved: [],
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117 | safari10: false,
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118 | toplevel: false,
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119 | }, true);
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120 | if (options.mangle.properties) {
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121 | if (typeof options.mangle.properties != "object") {
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122 | options.mangle.properties = {};
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123 | }
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124 | if (options.mangle.properties.keep_quoted) {
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125 | quoted_props = options.mangle.properties.reserved;
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126 | if (!Array.isArray(quoted_props)) quoted_props = [];
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127 | options.mangle.properties.reserved = quoted_props;
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128 | }
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129 | if (options.nameCache && !("cache" in options.mangle.properties)) {
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130 | options.mangle.properties.cache = options.nameCache.props || {};
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131 | }
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132 | }
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133 | init_cache(options.mangle.cache);
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134 | init_cache(options.mangle.properties.cache);
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135 | }
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136 | if (options.sourceMap) {
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137 | options.sourceMap = defaults(options.sourceMap, {
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138 | asObject: false,
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139 | content: null,
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140 | filename: null,
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141 | includeSources: false,
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142 | root: null,
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143 | url: null,
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144 | }, true);
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145 | }
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146 | if (timings) timings.parse = Date.now();
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147 | var toplevel;
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148 | if (files instanceof AST_Toplevel) {
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149 | toplevel = files;
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150 | } else {
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151 | if (typeof files == "string") {
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152 | files = [ files ];
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153 | }
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154 | options.parse = options.parse || {};
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155 | options.parse.toplevel = null;
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156 | for (var name in files) if (HOP(files, name)) {
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157 | options.parse.filename = name;
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158 | options.parse.toplevel = parse(files[name], options.parse);
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159 | if (options.sourceMap && options.sourceMap.content == "inline") {
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160 | if (Object.keys(files).length > 1)
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161 | throw new Error("inline source map only works with singular input");
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162 | options.sourceMap.content = read_source_map(files[name]);
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163 | }
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164 | }
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165 | toplevel = options.parse.toplevel;
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166 | }
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167 | if (quoted_props && options.mangle.properties.keep_quoted !== "strict") {
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168 | reserve_quoted_keys(toplevel, quoted_props);
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169 | }
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170 | if (options.wrap) {
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171 | toplevel = toplevel.wrap_commonjs(options.wrap);
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172 | }
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173 | if (options.enclose) {
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174 | toplevel = toplevel.wrap_enclose(options.enclose);
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175 | }
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176 | if (timings) timings.rename = Date.now();
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177 |
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178 |
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179 | if (0 && options.rename) {
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180 | toplevel.figure_out_scope(options.mangle);
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181 | toplevel.expand_names(options.mangle);
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182 | }
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183 | if (timings) timings.compress = Date.now();
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184 | if (options.compress) {
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185 | toplevel = new Compressor(options.compress, {
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186 | mangle_options: options.mangle
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187 | }).compress(toplevel);
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188 | }
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189 | if (timings) timings.scope = Date.now();
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190 | if (options.mangle) toplevel.figure_out_scope(options.mangle);
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191 | if (timings) timings.mangle = Date.now();
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192 | if (options.mangle) {
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193 | base54.reset();
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194 | toplevel.compute_char_frequency(options.mangle);
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195 | toplevel.mangle_names(options.mangle);
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196 | }
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197 | if (timings) timings.properties = Date.now();
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198 | if (options.mangle && options.mangle.properties) {
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199 | toplevel = mangle_properties(toplevel, options.mangle.properties);
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200 | }
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201 | if (timings) timings.format = Date.now();
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202 | var result = {};
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203 | if (options.format.ast) {
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204 | result.ast = toplevel;
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205 | }
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206 | if (!HOP(options.format, "code") || options.format.code) {
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207 | if (options.sourceMap) {
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208 | options.format.source_map = await SourceMap({
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209 | file: options.sourceMap.filename,
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210 | orig: options.sourceMap.content,
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211 | root: options.sourceMap.root
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212 | });
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213 | if (options.sourceMap.includeSources) {
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214 | if (files instanceof AST_Toplevel) {
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215 | throw new Error("original source content unavailable");
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216 | } else for (var name in files) if (HOP(files, name)) {
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217 | options.format.source_map.get().setSourceContent(name, files[name]);
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218 | }
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219 | }
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220 | }
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221 | delete options.format.ast;
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222 | delete options.format.code;
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223 | var stream = OutputStream(options.format);
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224 | toplevel.print(stream);
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225 | result.code = stream.get();
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226 | if (options.sourceMap) {
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227 | if(options.sourceMap.asObject) {
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228 | result.map = options.format.source_map.get().toJSON();
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229 | } else {
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230 | result.map = options.format.source_map.toString();
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231 | }
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232 | if (options.sourceMap.url == "inline") {
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233 | var sourceMap = typeof result.map === "object" ? JSON.stringify(result.map) : result.map;
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234 | result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(sourceMap);
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235 | } else if (options.sourceMap.url) {
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236 | result.code += "\n//# sourceMappingURL=" + options.sourceMap.url;
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237 | }
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238 | }
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239 | }
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240 | if (options.nameCache && options.mangle) {
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241 | if (options.mangle.cache) options.nameCache.vars = cache_to_json(options.mangle.cache);
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242 | if (options.mangle.properties && options.mangle.properties.cache) {
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243 | options.nameCache.props = cache_to_json(options.mangle.properties.cache);
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244 | }
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245 | }
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246 | if (options.format && options.format.source_map) {
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247 | options.format.source_map.destroy();
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248 | }
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249 | if (timings) {
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250 | timings.end = Date.now();
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251 | result.timings = {
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252 | parse: 1e-3 * (timings.rename - timings.parse),
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253 | rename: 1e-3 * (timings.compress - timings.rename),
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254 | compress: 1e-3 * (timings.scope - timings.compress),
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255 | scope: 1e-3 * (timings.mangle - timings.scope),
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256 | mangle: 1e-3 * (timings.properties - timings.mangle),
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257 | properties: 1e-3 * (timings.format - timings.properties),
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258 | format: 1e-3 * (timings.end - timings.format),
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259 | total: 1e-3 * (timings.end - timings.start)
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260 | };
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261 | }
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262 | return result;
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263 | }
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264 |
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265 | export {
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266 | minify,
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267 | to_ascii,
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268 | };
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