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