[6a3a178] | 1 | import {
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| 2 | AST_Accessor,
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| 3 | AST_Array,
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| 4 | AST_Arrow,
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| 5 | AST_Await,
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| 6 | AST_BigInt,
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| 7 | AST_Binary,
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| 8 | AST_Block,
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| 9 | AST_Break,
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| 10 | AST_Call,
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| 11 | AST_Case,
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| 12 | AST_Class,
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| 13 | AST_ClassPrivateProperty,
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| 14 | AST_ClassProperty,
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| 15 | AST_ConciseMethod,
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| 16 | AST_Conditional,
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| 17 | AST_Const,
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| 18 | AST_Continue,
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| 19 | AST_Debugger,
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| 20 | AST_Default,
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| 21 | AST_Defun,
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| 22 | AST_Destructuring,
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| 23 | AST_Directive,
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| 24 | AST_Do,
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| 25 | AST_Dot,
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| 26 | AST_DotHash,
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| 27 | AST_EmptyStatement,
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| 28 | AST_Expansion,
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| 29 | AST_Export,
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| 30 | AST_False,
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| 31 | AST_For,
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| 32 | AST_ForIn,
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| 33 | AST_Function,
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| 34 | AST_Hole,
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| 35 | AST_If,
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| 36 | AST_Import,
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| 37 | AST_ImportMeta,
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| 38 | AST_Infinity,
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| 39 | AST_LabeledStatement,
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| 40 | AST_Let,
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| 41 | AST_NameMapping,
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| 42 | AST_NaN,
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| 43 | AST_New,
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| 44 | AST_NewTarget,
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| 45 | AST_Node,
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| 46 | AST_Null,
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| 47 | AST_Number,
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| 48 | AST_Object,
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| 49 | AST_ObjectKeyVal,
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| 50 | AST_ObjectGetter,
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| 51 | AST_ObjectSetter,
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| 52 | AST_PrivateGetter,
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| 53 | AST_PrivateMethod,
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| 54 | AST_PrivateSetter,
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| 55 | AST_RegExp,
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| 56 | AST_Return,
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| 57 | AST_Sequence,
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| 58 | AST_String,
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| 59 | AST_Sub,
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| 60 | AST_Super,
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| 61 | AST_Switch,
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| 62 | AST_Symbol,
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| 63 | AST_SymbolClassProperty,
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| 64 | AST_SymbolExportForeign,
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| 65 | AST_SymbolImportForeign,
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| 66 | AST_SymbolRef,
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| 67 | AST_SymbolDeclaration,
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| 68 | AST_TemplateSegment,
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| 69 | AST_TemplateString,
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| 70 | AST_This,
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| 71 | AST_Throw,
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| 72 | AST_Toplevel,
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| 73 | AST_True,
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| 74 | AST_Try,
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| 75 | AST_Catch,
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| 76 | AST_Finally,
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| 77 | AST_Unary,
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| 78 | AST_Undefined,
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| 79 | AST_Var,
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| 80 | AST_VarDef,
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| 81 | AST_While,
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| 82 | AST_With,
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| 83 | AST_Yield,
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| 84 | walk_parent
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| 85 | } from "./ast.js";
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| 86 | import { first_in_statement } from "./utils/first_in_statement.js";
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| 87 |
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| 88 | let mangle_options = undefined;
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| 89 | AST_Node.prototype.size = function (compressor, stack) {
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| 90 | mangle_options = compressor && compressor.mangle_options;
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| 91 |
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| 92 | let size = 0;
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| 93 | walk_parent(this, (node, info) => {
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| 94 | size += node._size(info);
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| 95 |
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| 96 | // Braceless arrow functions have fake "return" statements
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| 97 | if (node instanceof AST_Arrow && node.is_braceless()) {
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| 98 | size += node.body[0].value._size(info);
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| 99 | return true;
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| 100 | }
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| 101 | }, stack || (compressor && compressor.stack));
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| 102 |
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| 103 | // just to save a bit of memory
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| 104 | mangle_options = undefined;
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| 105 |
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| 106 | return size;
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| 107 | };
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| 108 |
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| 109 | AST_Node.prototype._size = () => 0;
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| 110 |
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| 111 | AST_Debugger.prototype._size = () => 8;
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| 112 |
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| 113 | AST_Directive.prototype._size = function () {
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| 114 | // TODO string encoding stuff
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| 115 | return 2 + this.value.length;
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| 116 | };
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| 117 |
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| 118 | const list_overhead = (array) => array.length && array.length - 1;
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| 119 |
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| 120 | AST_Block.prototype._size = function () {
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| 121 | return 2 + list_overhead(this.body);
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| 122 | };
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| 123 |
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| 124 | AST_Toplevel.prototype._size = function() {
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| 125 | return list_overhead(this.body);
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| 126 | };
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| 127 |
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| 128 | AST_EmptyStatement.prototype._size = () => 1;
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| 129 |
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| 130 | AST_LabeledStatement.prototype._size = () => 2; // x:
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| 131 |
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| 132 | AST_Do.prototype._size = () => 9;
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| 133 |
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| 134 | AST_While.prototype._size = () => 7;
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| 135 |
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| 136 | AST_For.prototype._size = () => 8;
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| 137 |
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| 138 | AST_ForIn.prototype._size = () => 8;
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| 139 | // AST_ForOf inherits ^
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| 140 |
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| 141 | AST_With.prototype._size = () => 6;
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| 142 |
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| 143 | AST_Expansion.prototype._size = () => 3;
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| 144 |
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| 145 | const lambda_modifiers = func =>
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| 146 | (func.is_generator ? 1 : 0) + (func.async ? 6 : 0);
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| 147 |
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| 148 | AST_Accessor.prototype._size = function () {
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| 149 | return lambda_modifiers(this) + 4 + list_overhead(this.argnames) + list_overhead(this.body);
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| 150 | };
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| 151 |
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| 152 | AST_Function.prototype._size = function (info) {
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| 153 | const first = !!first_in_statement(info);
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| 154 | return (first * 2) + lambda_modifiers(this) + 12 + list_overhead(this.argnames) + list_overhead(this.body);
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| 155 | };
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| 156 |
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| 157 | AST_Defun.prototype._size = function () {
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| 158 | return lambda_modifiers(this) + 13 + list_overhead(this.argnames) + list_overhead(this.body);
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| 159 | };
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| 160 |
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| 161 | AST_Arrow.prototype._size = function () {
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| 162 | let args_and_arrow = 2 + list_overhead(this.argnames);
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| 163 |
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| 164 | if (
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| 165 | !(
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| 166 | this.argnames.length === 1
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| 167 | && this.argnames[0] instanceof AST_Symbol
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| 168 | )
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| 169 | ) {
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| 170 | args_and_arrow += 2;
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| 171 | }
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| 172 |
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| 173 | const body_overhead = this.is_braceless() ? 0 : list_overhead(this.body) + 2;
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| 174 |
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| 175 | return lambda_modifiers(this) + args_and_arrow + body_overhead;
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| 176 | };
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| 177 |
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| 178 | AST_Destructuring.prototype._size = () => 2;
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| 179 |
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| 180 | AST_TemplateString.prototype._size = function () {
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| 181 | return 2 + (Math.floor(this.segments.length / 2) * 3); /* "${}" */
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| 182 | };
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| 183 |
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| 184 | AST_TemplateSegment.prototype._size = function () {
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| 185 | return this.value.length;
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| 186 | };
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| 187 |
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| 188 | AST_Return.prototype._size = function () {
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| 189 | return this.value ? 7 : 6;
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| 190 | };
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| 191 |
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| 192 | AST_Throw.prototype._size = () => 6;
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| 193 |
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| 194 | AST_Break.prototype._size = function () {
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| 195 | return this.label ? 6 : 5;
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| 196 | };
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| 197 |
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| 198 | AST_Continue.prototype._size = function () {
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| 199 | return this.label ? 9 : 8;
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| 200 | };
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| 201 |
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| 202 | AST_If.prototype._size = () => 4;
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| 203 |
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| 204 | AST_Switch.prototype._size = function () {
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| 205 | return 8 + list_overhead(this.body);
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| 206 | };
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| 207 |
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| 208 | AST_Case.prototype._size = function () {
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| 209 | return 5 + list_overhead(this.body);
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| 210 | };
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| 211 |
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| 212 | AST_Default.prototype._size = function () {
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| 213 | return 8 + list_overhead(this.body);
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| 214 | };
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| 215 |
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| 216 | AST_Try.prototype._size = function () {
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| 217 | return 3 + list_overhead(this.body);
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| 218 | };
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| 219 |
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| 220 | AST_Catch.prototype._size = function () {
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| 221 | let size = 7 + list_overhead(this.body);
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| 222 | if (this.argname) {
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| 223 | size += 2;
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| 224 | }
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| 225 | return size;
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| 226 | };
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| 227 |
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| 228 | AST_Finally.prototype._size = function () {
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| 229 | return 7 + list_overhead(this.body);
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| 230 | };
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| 231 |
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| 232 | /*#__INLINE__*/
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| 233 | const def_size = (size, def) => size + list_overhead(def.definitions);
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| 234 |
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| 235 | AST_Var.prototype._size = function () {
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| 236 | return def_size(4, this);
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| 237 | };
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| 238 |
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| 239 | AST_Let.prototype._size = function () {
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| 240 | return def_size(4, this);
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| 241 | };
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| 242 |
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| 243 | AST_Const.prototype._size = function () {
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| 244 | return def_size(6, this);
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| 245 | };
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| 246 |
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| 247 | AST_VarDef.prototype._size = function () {
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| 248 | return this.value ? 1 : 0;
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| 249 | };
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| 250 |
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| 251 | AST_NameMapping.prototype._size = function () {
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| 252 | // foreign name isn't mangled
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| 253 | return this.name ? 4 : 0;
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| 254 | };
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| 255 |
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| 256 | AST_Import.prototype._size = function () {
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| 257 | // import
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| 258 | let size = 6;
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| 259 |
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| 260 | if (this.imported_name) size += 1;
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| 261 |
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| 262 | // from
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| 263 | if (this.imported_name || this.imported_names) size += 5;
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| 264 |
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| 265 | // braces, and the commas
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| 266 | if (this.imported_names) {
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| 267 | size += 2 + list_overhead(this.imported_names);
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| 268 | }
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| 269 |
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| 270 | return size;
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| 271 | };
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| 272 |
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| 273 | AST_ImportMeta.prototype._size = () => 11;
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| 274 |
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| 275 | AST_Export.prototype._size = function () {
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| 276 | let size = 7 + (this.is_default ? 8 : 0);
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| 277 |
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| 278 | if (this.exported_value) {
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| 279 | size += this.exported_value._size();
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| 280 | }
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| 281 |
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| 282 | if (this.exported_names) {
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| 283 | // Braces and commas
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| 284 | size += 2 + list_overhead(this.exported_names);
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| 285 | }
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| 286 |
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| 287 | if (this.module_name) {
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| 288 | // "from "
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| 289 | size += 5;
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| 290 | }
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| 291 |
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| 292 | return size;
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| 293 | };
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| 294 |
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| 295 | AST_Call.prototype._size = function () {
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| 296 | if (this.optional) {
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| 297 | return 4 + list_overhead(this.args);
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| 298 | }
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| 299 | return 2 + list_overhead(this.args);
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| 300 | };
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| 301 |
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| 302 | AST_New.prototype._size = function () {
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| 303 | return 6 + list_overhead(this.args);
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| 304 | };
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| 305 |
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| 306 | AST_Sequence.prototype._size = function () {
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| 307 | return list_overhead(this.expressions);
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| 308 | };
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| 309 |
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| 310 | AST_Dot.prototype._size = function () {
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| 311 | if (this.optional) {
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| 312 | return this.property.length + 2;
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| 313 | }
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| 314 | return this.property.length + 1;
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| 315 | };
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| 316 |
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| 317 | AST_DotHash.prototype._size = function () {
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| 318 | if (this.optional) {
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| 319 | return this.property.length + 3;
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| 320 | }
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| 321 | return this.property.length + 2;
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| 322 | };
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| 323 |
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| 324 | AST_Sub.prototype._size = function () {
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| 325 | return this.optional ? 4 : 2;
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| 326 | };
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| 327 |
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| 328 | AST_Unary.prototype._size = function () {
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| 329 | if (this.operator === "typeof") return 7;
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| 330 | if (this.operator === "void") return 5;
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| 331 | return this.operator.length;
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| 332 | };
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| 333 |
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| 334 | AST_Binary.prototype._size = function (info) {
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| 335 | if (this.operator === "in") return 4;
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| 336 |
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| 337 | let size = this.operator.length;
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| 338 |
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| 339 | if (
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| 340 | (this.operator === "+" || this.operator === "-")
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| 341 | && this.right instanceof AST_Unary && this.right.operator === this.operator
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| 342 | ) {
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| 343 | // 1+ +a > needs space between the +
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| 344 | size += 1;
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| 345 | }
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| 346 |
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| 347 | if (this.needs_parens(info)) {
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| 348 | size += 2;
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| 349 | }
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| 350 |
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| 351 | return size;
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| 352 | };
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| 353 |
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| 354 | AST_Conditional.prototype._size = () => 3;
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| 355 |
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| 356 | AST_Array.prototype._size = function () {
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| 357 | return 2 + list_overhead(this.elements);
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| 358 | };
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| 359 |
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| 360 | AST_Object.prototype._size = function (info) {
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| 361 | let base = 2;
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| 362 | if (first_in_statement(info)) {
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| 363 | base += 2; // parens
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| 364 | }
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| 365 | return base + list_overhead(this.properties);
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| 366 | };
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| 367 |
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| 368 | /*#__INLINE__*/
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| 369 | const key_size = key =>
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| 370 | typeof key === "string" ? key.length : 0;
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| 371 |
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| 372 | AST_ObjectKeyVal.prototype._size = function () {
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| 373 | return key_size(this.key) + 1;
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| 374 | };
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| 375 |
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| 376 | /*#__INLINE__*/
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| 377 | const static_size = is_static => is_static ? 7 : 0;
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| 378 |
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| 379 | AST_ObjectGetter.prototype._size = function () {
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| 380 | return 5 + static_size(this.static) + key_size(this.key);
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| 381 | };
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| 382 |
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| 383 | AST_ObjectSetter.prototype._size = function () {
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| 384 | return 5 + static_size(this.static) + key_size(this.key);
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| 385 | };
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| 386 |
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| 387 | AST_ConciseMethod.prototype._size = function () {
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| 388 | return static_size(this.static) + key_size(this.key) + lambda_modifiers(this);
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| 389 | };
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| 390 |
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| 391 | AST_PrivateMethod.prototype._size = function () {
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| 392 | return AST_ConciseMethod.prototype._size.call(this) + 1;
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| 393 | };
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| 394 |
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| 395 | AST_PrivateGetter.prototype._size = AST_PrivateSetter.prototype._size = function () {
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| 396 | return AST_ConciseMethod.prototype._size.call(this) + 4;
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| 397 | };
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| 398 |
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| 399 | AST_Class.prototype._size = function () {
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| 400 | return (
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| 401 | (this.name ? 8 : 7)
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| 402 | + (this.extends ? 8 : 0)
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| 403 | );
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| 404 | };
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| 405 |
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| 406 | AST_ClassProperty.prototype._size = function () {
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| 407 | return (
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| 408 | static_size(this.static)
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| 409 | + (typeof this.key === "string" ? this.key.length + 2 : 0)
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| 410 | + (this.value ? 1 : 0)
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| 411 | );
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| 412 | };
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| 413 |
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| 414 | AST_ClassPrivateProperty.prototype._size = function () {
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| 415 | return AST_ClassProperty.prototype._size.call(this) + 1;
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| 416 | };
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| 417 |
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| 418 | AST_Symbol.prototype._size = function () {
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| 419 | return !mangle_options || this.definition().unmangleable(mangle_options)
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| 420 | ? this.name.length
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| 421 | : 1;
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| 422 | };
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| 423 |
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| 424 | // TODO take propmangle into account
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| 425 | AST_SymbolClassProperty.prototype._size = function () {
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| 426 | return this.name.length;
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| 427 | };
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| 428 |
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| 429 | AST_SymbolRef.prototype._size = AST_SymbolDeclaration.prototype._size = function () {
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| 430 | const { name, thedef } = this;
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| 431 |
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| 432 | if (thedef && thedef.global) return name.length;
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| 433 |
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| 434 | if (name === "arguments") return 9;
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| 435 |
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| 436 | return AST_Symbol.prototype._size.call(this);
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| 437 | };
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| 438 |
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| 439 | AST_NewTarget.prototype._size = () => 10;
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| 440 |
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| 441 | AST_SymbolImportForeign.prototype._size = function () {
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| 442 | return this.name.length;
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| 443 | };
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| 444 |
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| 445 | AST_SymbolExportForeign.prototype._size = function () {
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| 446 | return this.name.length;
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| 447 | };
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| 448 |
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| 449 | AST_This.prototype._size = () => 4;
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| 450 |
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| 451 | AST_Super.prototype._size = () => 5;
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| 452 |
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| 453 | AST_String.prototype._size = function () {
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| 454 | return this.value.length + 2;
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| 455 | };
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| 456 |
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| 457 | AST_Number.prototype._size = function () {
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| 458 | const { value } = this;
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| 459 | if (value === 0) return 1;
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| 460 | if (value > 0 && Math.floor(value) === value) {
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| 461 | return Math.floor(Math.log10(value) + 1);
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| 462 | }
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| 463 | return value.toString().length;
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| 464 | };
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| 465 |
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| 466 | AST_BigInt.prototype._size = function () {
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| 467 | return this.value.length;
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| 468 | };
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| 469 |
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| 470 | AST_RegExp.prototype._size = function () {
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| 471 | return this.value.toString().length;
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| 472 | };
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| 473 |
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| 474 | AST_Null.prototype._size = () => 4;
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| 475 |
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| 476 | AST_NaN.prototype._size = () => 3;
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| 477 |
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| 478 | AST_Undefined.prototype._size = () => 6; // "void 0"
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| 479 |
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| 480 | AST_Hole.prototype._size = () => 0; // comma is taken into account
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| 481 |
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| 482 | AST_Infinity.prototype._size = () => 8;
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| 483 |
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| 484 | AST_True.prototype._size = () => 4;
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| 485 |
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| 486 | AST_False.prototype._size = () => 5;
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| 487 |
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| 488 | AST_Await.prototype._size = () => 6;
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| 489 |
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| 490 | AST_Yield.prototype._size = () => 6;
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