1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = _default;
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7 |
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8 | var _helperGetFunctionArity = require("@babel/helper-get-function-arity");
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9 |
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10 | var _template = require("@babel/template");
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11 |
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12 | var _t = require("@babel/types");
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13 |
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14 | const {
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15 | NOT_LOCAL_BINDING,
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16 | cloneNode,
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17 | identifier,
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18 | isAssignmentExpression,
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19 | isFunction,
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20 | isIdentifier,
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21 | isLiteral,
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22 | isNullLiteral,
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23 | isObjectMethod,
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24 | isObjectProperty,
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25 | isRegExpLiteral,
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26 | isTemplateLiteral,
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27 | isVariableDeclarator,
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28 | toBindingIdentifierName
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29 | } = _t;
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30 | const buildPropertyMethodAssignmentWrapper = (0, _template.default)(`
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31 | (function (FUNCTION_KEY) {
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32 | function FUNCTION_ID() {
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33 | return FUNCTION_KEY.apply(this, arguments);
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34 | }
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35 |
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36 | FUNCTION_ID.toString = function () {
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37 | return FUNCTION_KEY.toString();
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38 | }
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39 |
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40 | return FUNCTION_ID;
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41 | })(FUNCTION)
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42 | `);
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43 | const buildGeneratorPropertyMethodAssignmentWrapper = (0, _template.default)(`
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44 | (function (FUNCTION_KEY) {
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45 | function* FUNCTION_ID() {
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46 | return yield* FUNCTION_KEY.apply(this, arguments);
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47 | }
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48 |
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49 | FUNCTION_ID.toString = function () {
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50 | return FUNCTION_KEY.toString();
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51 | };
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52 |
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53 | return FUNCTION_ID;
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54 | })(FUNCTION)
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55 | `);
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56 | const visitor = {
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57 | "ReferencedIdentifier|BindingIdentifier"(path, state) {
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58 | if (path.node.name !== state.name) return;
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59 | const localDeclar = path.scope.getBindingIdentifier(state.name);
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60 | if (localDeclar !== state.outerDeclar) return;
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61 | state.selfReference = true;
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62 | path.stop();
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63 | }
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64 |
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65 | };
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66 |
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67 | function getNameFromLiteralId(id) {
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68 | if (isNullLiteral(id)) {
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69 | return "null";
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70 | }
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71 |
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72 | if (isRegExpLiteral(id)) {
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73 | return `_${id.pattern}_${id.flags}`;
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74 | }
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75 |
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76 | if (isTemplateLiteral(id)) {
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77 | return id.quasis.map(quasi => quasi.value.raw).join("");
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78 | }
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79 |
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80 | if (id.value !== undefined) {
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81 | return id.value + "";
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82 | }
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83 |
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84 | return "";
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85 | }
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86 |
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87 | function wrap(state, method, id, scope) {
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88 | if (state.selfReference) {
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89 | if (scope.hasBinding(id.name) && !scope.hasGlobal(id.name)) {
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90 | scope.rename(id.name);
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91 | } else {
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92 | if (!isFunction(method)) return;
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93 | let build = buildPropertyMethodAssignmentWrapper;
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94 |
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95 | if (method.generator) {
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96 | build = buildGeneratorPropertyMethodAssignmentWrapper;
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97 | }
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98 |
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99 | const template = build({
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100 | FUNCTION: method,
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101 | FUNCTION_ID: id,
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102 | FUNCTION_KEY: scope.generateUidIdentifier(id.name)
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103 | }).expression;
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104 | const params = template.callee.body.body[0].params;
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105 |
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106 | for (let i = 0, len = (0, _helperGetFunctionArity.default)(method); i < len; i++) {
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107 | params.push(scope.generateUidIdentifier("x"));
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108 | }
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109 |
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110 | return template;
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111 | }
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112 | }
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113 |
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114 | method.id = id;
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115 | scope.getProgramParent().references[id.name] = true;
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116 | }
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117 |
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118 | function visit(node, name, scope) {
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119 | const state = {
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120 | selfAssignment: false,
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121 | selfReference: false,
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122 | outerDeclar: scope.getBindingIdentifier(name),
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123 | references: [],
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124 | name: name
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125 | };
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126 | const binding = scope.getOwnBinding(name);
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127 |
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128 | if (binding) {
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129 | if (binding.kind === "param") {
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130 | state.selfReference = true;
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131 | } else {}
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132 | } else if (state.outerDeclar || scope.hasGlobal(name)) {
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133 | scope.traverse(node, visitor, state);
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134 | }
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135 |
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136 | return state;
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137 | }
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138 |
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139 | function _default({
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140 | node,
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141 | parent,
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142 | scope,
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143 | id
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144 | }, localBinding = false, supportUnicodeId = false) {
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145 | if (node.id) return;
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146 |
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147 | if ((isObjectProperty(parent) || isObjectMethod(parent, {
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148 | kind: "method"
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149 | })) && (!parent.computed || isLiteral(parent.key))) {
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150 | id = parent.key;
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151 | } else if (isVariableDeclarator(parent)) {
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152 | id = parent.id;
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153 |
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154 | if (isIdentifier(id) && !localBinding) {
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155 | const binding = scope.parent.getBinding(id.name);
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156 |
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157 | if (binding && binding.constant && scope.getBinding(id.name) === binding) {
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158 | node.id = cloneNode(id);
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159 | node.id[NOT_LOCAL_BINDING] = true;
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160 | return;
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161 | }
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162 | }
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163 | } else if (isAssignmentExpression(parent, {
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164 | operator: "="
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165 | })) {
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166 | id = parent.left;
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167 | } else if (!id) {
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168 | return;
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169 | }
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170 |
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171 | let name;
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172 |
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173 | if (id && isLiteral(id)) {
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174 | name = getNameFromLiteralId(id);
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175 | } else if (id && isIdentifier(id)) {
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176 | name = id.name;
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177 | }
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178 |
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179 | if (name === undefined) {
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180 | return;
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181 | }
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182 |
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183 | if (!supportUnicodeId && isFunction(node) && /[\uD800-\uDFFF]/.test(name)) {
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184 | return;
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185 | }
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186 |
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187 | name = toBindingIdentifierName(name);
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188 | id = identifier(name);
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189 | id[NOT_LOCAL_BINDING] = true;
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190 | const state = visit(node, name, scope);
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191 | return wrap(state, node, id, scope) || node;
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192 | } |
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