"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = _default;
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var _template = require("@babel/template");
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var _t = require("@babel/types");
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const {
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NOT_LOCAL_BINDING,
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cloneNode,
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identifier,
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isAssignmentExpression,
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isAssignmentPattern,
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isFunction,
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isIdentifier,
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isLiteral,
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isNullLiteral,
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isObjectMethod,
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isObjectProperty,
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isRegExpLiteral,
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isRestElement,
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isTemplateLiteral,
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isVariableDeclarator,
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toBindingIdentifierName
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} = _t;
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function getFunctionArity(node) {
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const count = node.params.findIndex(param => isAssignmentPattern(param) || isRestElement(param));
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return count === -1 ? node.params.length : count;
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}
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const buildPropertyMethodAssignmentWrapper = _template.default.statement(`
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(function (FUNCTION_KEY) {
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function FUNCTION_ID() {
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return FUNCTION_KEY.apply(this, arguments);
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}
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FUNCTION_ID.toString = function () {
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return FUNCTION_KEY.toString();
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}
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return FUNCTION_ID;
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})(FUNCTION)
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`);
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const buildGeneratorPropertyMethodAssignmentWrapper = _template.default.statement(`
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(function (FUNCTION_KEY) {
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function* FUNCTION_ID() {
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return yield* FUNCTION_KEY.apply(this, arguments);
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}
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FUNCTION_ID.toString = function () {
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return FUNCTION_KEY.toString();
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};
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return FUNCTION_ID;
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})(FUNCTION)
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`);
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const visitor = {
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"ReferencedIdentifier|BindingIdentifier"(path, state) {
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if (path.node.name !== state.name) return;
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const localDeclar = path.scope.getBindingIdentifier(state.name);
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if (localDeclar !== state.outerDeclar) return;
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state.selfReference = true;
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path.stop();
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}
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};
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function getNameFromLiteralId(id) {
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if (isNullLiteral(id)) {
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return "null";
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}
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if (isRegExpLiteral(id)) {
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return `_${id.pattern}_${id.flags}`;
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}
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if (isTemplateLiteral(id)) {
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return id.quasis.map(quasi => quasi.value.raw).join("");
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}
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if (id.value !== undefined) {
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return id.value + "";
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}
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return "";
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}
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function wrap(state, method, id, scope) {
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if (state.selfReference) {
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if (scope.hasBinding(id.name) && !scope.hasGlobal(id.name)) {
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scope.rename(id.name);
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} else {
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if (!isFunction(method)) return;
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let build = buildPropertyMethodAssignmentWrapper;
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if (method.generator) {
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build = buildGeneratorPropertyMethodAssignmentWrapper;
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}
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const template = build({
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FUNCTION: method,
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FUNCTION_ID: id,
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FUNCTION_KEY: scope.generateUidIdentifier(id.name)
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}).expression;
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const params = template.callee.body.body[0].params;
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for (let i = 0, len = getFunctionArity(method); i < len; i++) {
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params.push(scope.generateUidIdentifier("x"));
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}
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return template;
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}
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}
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method.id = id;
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scope.getProgramParent().references[id.name] = true;
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}
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function visit(node, name, scope) {
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const state = {
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selfAssignment: false,
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selfReference: false,
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outerDeclar: scope.getBindingIdentifier(name),
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name: name
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};
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const binding = scope.getOwnBinding(name);
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if (binding) {
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if (binding.kind === "param") {
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state.selfReference = true;
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} else {}
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} else if (state.outerDeclar || scope.hasGlobal(name)) {
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scope.traverse(node, visitor, state);
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}
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return state;
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}
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function _default({
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node,
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parent,
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scope,
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id
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}, localBinding = false, supportUnicodeId = false) {
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if (node.id) return;
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if ((isObjectProperty(parent) || isObjectMethod(parent, {
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kind: "method"
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})) && (!parent.computed || isLiteral(parent.key))) {
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id = parent.key;
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} else if (isVariableDeclarator(parent)) {
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id = parent.id;
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if (isIdentifier(id) && !localBinding) {
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const binding = scope.parent.getBinding(id.name);
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if (binding && binding.constant && scope.getBinding(id.name) === binding) {
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node.id = cloneNode(id);
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node.id[NOT_LOCAL_BINDING] = true;
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return;
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}
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}
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} else if (isAssignmentExpression(parent, {
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operator: "="
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})) {
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id = parent.left;
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} else if (!id) {
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return;
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}
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let name;
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if (id && isLiteral(id)) {
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name = getNameFromLiteralId(id);
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} else if (id && isIdentifier(id)) {
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name = id.name;
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}
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if (name === undefined) {
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return;
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}
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if (!supportUnicodeId && isFunction(node) && /[\uD800-\uDFFF]/.test(name)) {
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return;
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}
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name = toBindingIdentifierName(name);
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const newId = identifier(name);
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newId[NOT_LOCAL_BINDING] = true;
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const state = visit(node, name, scope);
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return wrap(state, node, newId, scope) || node;
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}
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//# sourceMappingURL=index.js.map
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