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- "use strict";
- exports.__esModule = true;
- var _symbol = require("babel-runtime/core-js/symbol");
- var _symbol2 = _interopRequireDefault(_symbol);
- var _plugin = require("../plugin");
- var _plugin2 = _interopRequireDefault(_plugin);
- var _babelTypes = require("babel-types");
- var t = _interopRequireWildcard(_babelTypes);
- function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
- function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
- var SUPER_THIS_BOUND = (0, _symbol2.default)("super this bound");
- var superVisitor = {
- CallExpression: function CallExpression(path) {
- if (!path.get("callee").isSuper()) return;
- var node = path.node;
- if (node[SUPER_THIS_BOUND]) return;
- node[SUPER_THIS_BOUND] = true;
- path.replaceWith(t.assignmentExpression("=", this.id, node));
- }
- };
- exports.default = new _plugin2.default({
- name: "internal.shadowFunctions",
- visitor: {
- ThisExpression: function ThisExpression(path) {
- remap(path, "this");
- },
- ReferencedIdentifier: function ReferencedIdentifier(path) {
- if (path.node.name === "arguments") {
- remap(path, "arguments");
- }
- }
- }
- });
- function shouldShadow(path, shadowPath) {
- if (path.is("_forceShadow")) {
- return true;
- } else {
- return shadowPath;
- }
- }
- function remap(path, key) {
- var shadowPath = path.inShadow(key);
- if (!shouldShadow(path, shadowPath)) return;
- var shadowFunction = path.node._shadowedFunctionLiteral;
- var currentFunction = void 0;
- var passedShadowFunction = false;
- var fnPath = path.find(function (innerPath) {
- if (innerPath.parentPath && innerPath.parentPath.isClassProperty() && innerPath.key === "value") {
- return true;
- }
- if (path === innerPath) return false;
- if (innerPath.isProgram() || innerPath.isFunction()) {
- currentFunction = currentFunction || innerPath;
- }
- if (innerPath.isProgram()) {
- passedShadowFunction = true;
- return true;
- } else if (innerPath.isFunction() && !innerPath.isArrowFunctionExpression()) {
- if (shadowFunction) {
- if (innerPath === shadowFunction || innerPath.node === shadowFunction.node) return true;
- } else {
- if (!innerPath.is("shadow")) return true;
- }
- passedShadowFunction = true;
- return false;
- }
- return false;
- });
- if (shadowFunction && fnPath.isProgram() && !shadowFunction.isProgram()) {
- fnPath = path.findParent(function (p) {
- return p.isProgram() || p.isFunction();
- });
- }
- if (fnPath === currentFunction) return;
- if (!passedShadowFunction) return;
- var cached = fnPath.getData(key);
- if (!cached) {
- var id = path.scope.generateUidIdentifier(key);
- fnPath.setData(key, id);
- cached = id;
- var classPath = fnPath.findParent(function (p) {
- return p.isClass();
- });
- var hasSuperClass = !!(classPath && classPath.node && classPath.node.superClass);
- if (key === "this" && fnPath.isMethod({ kind: "constructor" }) && hasSuperClass) {
- fnPath.scope.push({ id: id });
- fnPath.traverse(superVisitor, { id: id });
- } else {
- var init = key === "this" ? t.thisExpression() : t.identifier(key);
- if (shadowFunction) init._shadowedFunctionLiteral = shadowFunction;
- fnPath.scope.push({ id: id, init: init });
- }
- }
- var node = t.cloneDeep(cached);
- node.loc = path.node.loc;
- return path.replaceWith(node);
- }
- module.exports = exports["default"];
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