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559 lines
17 KiB
JavaScript
559 lines
17 KiB
JavaScript
"use strict";
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exports.__esModule = true;
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var _getIterator2 = require("babel-runtime/core-js/get-iterator");
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var _getIterator3 = _interopRequireDefault(_getIterator2);
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var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");
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var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
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var _babelTraverse = require("babel-traverse");
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var _babelHelperReplaceSupers = require("babel-helper-replace-supers");
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var _babelHelperReplaceSupers2 = _interopRequireDefault(_babelHelperReplaceSupers);
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var _babelHelperOptimiseCallExpression = require("babel-helper-optimise-call-expression");
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var _babelHelperOptimiseCallExpression2 = _interopRequireDefault(_babelHelperOptimiseCallExpression);
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var _babelHelperDefineMap = require("babel-helper-define-map");
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var defineMap = _interopRequireWildcard(_babelHelperDefineMap);
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var _babelTemplate = require("babel-template");
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var _babelTemplate2 = _interopRequireDefault(_babelTemplate);
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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 buildDerivedConstructor = (0, _babelTemplate2.default)("\n (function () {\n super(...arguments);\n })\n");
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var noMethodVisitor = {
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"FunctionExpression|FunctionDeclaration": function FunctionExpressionFunctionDeclaration(path) {
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if (!path.is("shadow")) {
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path.skip();
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}
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},
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Method: function Method(path) {
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path.skip();
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}
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};
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var verifyConstructorVisitor = _babelTraverse.visitors.merge([noMethodVisitor, {
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Super: function Super(path) {
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if (this.isDerived && !this.hasBareSuper && !path.parentPath.isCallExpression({ callee: path.node })) {
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throw path.buildCodeFrameError("'super.*' is not allowed before super()");
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}
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},
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CallExpression: {
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exit: function exit(path) {
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if (path.get("callee").isSuper()) {
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this.hasBareSuper = true;
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if (!this.isDerived) {
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throw path.buildCodeFrameError("super() is only allowed in a derived constructor");
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}
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}
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}
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},
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ThisExpression: function ThisExpression(path) {
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if (this.isDerived && !this.hasBareSuper) {
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if (!path.inShadow("this")) {
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throw path.buildCodeFrameError("'this' is not allowed before super()");
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}
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}
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}
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}]);
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var findThisesVisitor = _babelTraverse.visitors.merge([noMethodVisitor, {
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ThisExpression: function ThisExpression(path) {
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this.superThises.push(path);
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}
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}]);
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var ClassTransformer = function () {
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function ClassTransformer(path, file) {
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(0, _classCallCheck3.default)(this, ClassTransformer);
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this.parent = path.parent;
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this.scope = path.scope;
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this.node = path.node;
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this.path = path;
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this.file = file;
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this.clearDescriptors();
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this.instancePropBody = [];
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this.instancePropRefs = {};
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this.staticPropBody = [];
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this.body = [];
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this.bareSuperAfter = [];
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this.bareSupers = [];
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this.pushedConstructor = false;
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this.pushedInherits = false;
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this.isLoose = false;
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this.superThises = [];
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this.classId = this.node.id;
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this.classRef = this.node.id ? t.identifier(this.node.id.name) : this.scope.generateUidIdentifier("class");
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this.superName = this.node.superClass || t.identifier("Function");
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this.isDerived = !!this.node.superClass;
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}
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ClassTransformer.prototype.run = function run() {
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var _this = this;
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var superName = this.superName;
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var file = this.file;
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var body = this.body;
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var constructorBody = this.constructorBody = t.blockStatement([]);
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this.constructor = this.buildConstructor();
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var closureParams = [];
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var closureArgs = [];
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if (this.isDerived) {
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closureArgs.push(superName);
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superName = this.scope.generateUidIdentifierBasedOnNode(superName);
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closureParams.push(superName);
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this.superName = superName;
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}
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this.buildBody();
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constructorBody.body.unshift(t.expressionStatement(t.callExpression(file.addHelper("classCallCheck"), [t.thisExpression(), this.classRef])));
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body = body.concat(this.staticPropBody.map(function (fn) {
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return fn(_this.classRef);
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}));
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if (this.classId) {
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if (body.length === 1) return t.toExpression(body[0]);
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}
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body.push(t.returnStatement(this.classRef));
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var container = t.functionExpression(null, closureParams, t.blockStatement(body));
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container.shadow = true;
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return t.callExpression(container, closureArgs);
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};
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ClassTransformer.prototype.buildConstructor = function buildConstructor() {
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var func = t.functionDeclaration(this.classRef, [], this.constructorBody);
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t.inherits(func, this.node);
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return func;
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};
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ClassTransformer.prototype.pushToMap = function pushToMap(node, enumerable) {
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var kind = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : "value";
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var scope = arguments[3];
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var mutatorMap = void 0;
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if (node.static) {
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this.hasStaticDescriptors = true;
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mutatorMap = this.staticMutatorMap;
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} else {
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this.hasInstanceDescriptors = true;
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mutatorMap = this.instanceMutatorMap;
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}
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var map = defineMap.push(mutatorMap, node, kind, this.file, scope);
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if (enumerable) {
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map.enumerable = t.booleanLiteral(true);
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}
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return map;
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};
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ClassTransformer.prototype.constructorMeMaybe = function constructorMeMaybe() {
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var hasConstructor = false;
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var paths = this.path.get("body.body");
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for (var _iterator = paths, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator3.default)(_iterator);;) {
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var _ref;
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if (_isArray) {
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if (_i >= _iterator.length) break;
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_ref = _iterator[_i++];
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} else {
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_i = _iterator.next();
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if (_i.done) break;
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_ref = _i.value;
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}
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var path = _ref;
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hasConstructor = path.equals("kind", "constructor");
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if (hasConstructor) break;
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}
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if (hasConstructor) return;
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var params = void 0,
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body = void 0;
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if (this.isDerived) {
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var _constructor = buildDerivedConstructor().expression;
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params = _constructor.params;
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body = _constructor.body;
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} else {
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params = [];
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body = t.blockStatement([]);
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}
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this.path.get("body").unshiftContainer("body", t.classMethod("constructor", t.identifier("constructor"), params, body));
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};
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ClassTransformer.prototype.buildBody = function buildBody() {
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this.constructorMeMaybe();
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this.pushBody();
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this.verifyConstructor();
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if (this.userConstructor) {
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var constructorBody = this.constructorBody;
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constructorBody.body = constructorBody.body.concat(this.userConstructor.body.body);
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t.inherits(this.constructor, this.userConstructor);
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t.inherits(constructorBody, this.userConstructor.body);
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}
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this.pushDescriptors();
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};
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ClassTransformer.prototype.pushBody = function pushBody() {
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var classBodyPaths = this.path.get("body.body");
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for (var _iterator2 = classBodyPaths, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : (0, _getIterator3.default)(_iterator2);;) {
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var _ref2;
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if (_isArray2) {
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if (_i2 >= _iterator2.length) break;
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_ref2 = _iterator2[_i2++];
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} else {
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_i2 = _iterator2.next();
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if (_i2.done) break;
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_ref2 = _i2.value;
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}
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var path = _ref2;
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var node = path.node;
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if (path.isClassProperty()) {
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throw path.buildCodeFrameError("Missing class properties transform.");
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}
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if (node.decorators) {
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throw path.buildCodeFrameError("Method has decorators, put the decorator plugin before the classes one.");
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}
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if (t.isClassMethod(node)) {
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var isConstructor = node.kind === "constructor";
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if (isConstructor) {
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path.traverse(verifyConstructorVisitor, this);
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if (!this.hasBareSuper && this.isDerived) {
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throw path.buildCodeFrameError("missing super() call in constructor");
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}
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}
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var replaceSupers = new _babelHelperReplaceSupers2.default({
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forceSuperMemoisation: isConstructor,
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methodPath: path,
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methodNode: node,
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objectRef: this.classRef,
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superRef: this.superName,
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isStatic: node.static,
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isLoose: this.isLoose,
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scope: this.scope,
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file: this.file
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}, true);
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replaceSupers.replace();
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if (isConstructor) {
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this.pushConstructor(replaceSupers, node, path);
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} else {
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this.pushMethod(node, path);
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}
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}
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}
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};
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ClassTransformer.prototype.clearDescriptors = function clearDescriptors() {
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this.hasInstanceDescriptors = false;
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this.hasStaticDescriptors = false;
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this.instanceMutatorMap = {};
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this.staticMutatorMap = {};
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};
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ClassTransformer.prototype.pushDescriptors = function pushDescriptors() {
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this.pushInherits();
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var body = this.body;
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var instanceProps = void 0;
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var staticProps = void 0;
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if (this.hasInstanceDescriptors) {
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instanceProps = defineMap.toClassObject(this.instanceMutatorMap);
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}
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if (this.hasStaticDescriptors) {
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staticProps = defineMap.toClassObject(this.staticMutatorMap);
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}
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if (instanceProps || staticProps) {
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if (instanceProps) instanceProps = defineMap.toComputedObjectFromClass(instanceProps);
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if (staticProps) staticProps = defineMap.toComputedObjectFromClass(staticProps);
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var nullNode = t.nullLiteral();
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var args = [this.classRef, nullNode, nullNode, nullNode, nullNode];
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if (instanceProps) args[1] = instanceProps;
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if (staticProps) args[2] = staticProps;
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if (this.instanceInitializersId) {
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args[3] = this.instanceInitializersId;
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body.unshift(this.buildObjectAssignment(this.instanceInitializersId));
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}
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if (this.staticInitializersId) {
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args[4] = this.staticInitializersId;
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body.unshift(this.buildObjectAssignment(this.staticInitializersId));
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}
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var lastNonNullIndex = 0;
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for (var i = 0; i < args.length; i++) {
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if (args[i] !== nullNode) lastNonNullIndex = i;
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}
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args = args.slice(0, lastNonNullIndex + 1);
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body.push(t.expressionStatement(t.callExpression(this.file.addHelper("createClass"), args)));
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}
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this.clearDescriptors();
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};
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ClassTransformer.prototype.buildObjectAssignment = function buildObjectAssignment(id) {
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return t.variableDeclaration("var", [t.variableDeclarator(id, t.objectExpression([]))]);
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};
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ClassTransformer.prototype.wrapSuperCall = function wrapSuperCall(bareSuper, superRef, thisRef, body) {
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var bareSuperNode = bareSuper.node;
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if (this.isLoose) {
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bareSuperNode.arguments.unshift(t.thisExpression());
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if (bareSuperNode.arguments.length === 2 && t.isSpreadElement(bareSuperNode.arguments[1]) && t.isIdentifier(bareSuperNode.arguments[1].argument, { name: "arguments" })) {
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bareSuperNode.arguments[1] = bareSuperNode.arguments[1].argument;
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bareSuperNode.callee = t.memberExpression(superRef, t.identifier("apply"));
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} else {
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bareSuperNode.callee = t.memberExpression(superRef, t.identifier("call"));
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}
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} else {
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bareSuperNode = (0, _babelHelperOptimiseCallExpression2.default)(t.logicalExpression("||", t.memberExpression(this.classRef, t.identifier("__proto__")), t.callExpression(t.memberExpression(t.identifier("Object"), t.identifier("getPrototypeOf")), [this.classRef])), t.thisExpression(), bareSuperNode.arguments);
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}
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var call = t.callExpression(this.file.addHelper("possibleConstructorReturn"), [t.thisExpression(), bareSuperNode]);
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var bareSuperAfter = this.bareSuperAfter.map(function (fn) {
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return fn(thisRef);
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});
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if (bareSuper.parentPath.isExpressionStatement() && bareSuper.parentPath.container === body.node.body && body.node.body.length - 1 === bareSuper.parentPath.key) {
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if (this.superThises.length || bareSuperAfter.length) {
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bareSuper.scope.push({ id: thisRef });
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call = t.assignmentExpression("=", thisRef, call);
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}
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if (bareSuperAfter.length) {
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call = t.toSequenceExpression([call].concat(bareSuperAfter, [thisRef]));
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}
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bareSuper.parentPath.replaceWith(t.returnStatement(call));
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} else {
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bareSuper.replaceWithMultiple([t.variableDeclaration("var", [t.variableDeclarator(thisRef, call)])].concat(bareSuperAfter, [t.expressionStatement(thisRef)]));
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}
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};
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ClassTransformer.prototype.verifyConstructor = function verifyConstructor() {
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var _this2 = this;
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if (!this.isDerived) return;
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var path = this.userConstructorPath;
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var body = path.get("body");
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path.traverse(findThisesVisitor, this);
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var guaranteedSuperBeforeFinish = !!this.bareSupers.length;
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var superRef = this.superName || t.identifier("Function");
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var thisRef = path.scope.generateUidIdentifier("this");
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for (var _iterator3 = this.bareSupers, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : (0, _getIterator3.default)(_iterator3);;) {
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var _ref3;
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if (_isArray3) {
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if (_i3 >= _iterator3.length) break;
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_ref3 = _iterator3[_i3++];
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} else {
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_i3 = _iterator3.next();
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if (_i3.done) break;
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_ref3 = _i3.value;
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}
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var bareSuper = _ref3;
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this.wrapSuperCall(bareSuper, superRef, thisRef, body);
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if (guaranteedSuperBeforeFinish) {
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bareSuper.find(function (parentPath) {
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if (parentPath === path) {
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return true;
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}
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if (parentPath.isLoop() || parentPath.isConditional()) {
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guaranteedSuperBeforeFinish = false;
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return true;
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}
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});
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}
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}
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for (var _iterator4 = this.superThises, _isArray4 = Array.isArray(_iterator4), _i4 = 0, _iterator4 = _isArray4 ? _iterator4 : (0, _getIterator3.default)(_iterator4);;) {
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var _ref4;
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if (_isArray4) {
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if (_i4 >= _iterator4.length) break;
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_ref4 = _iterator4[_i4++];
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} else {
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_i4 = _iterator4.next();
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if (_i4.done) break;
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_ref4 = _i4.value;
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}
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var thisPath = _ref4;
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thisPath.replaceWith(thisRef);
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}
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var wrapReturn = function wrapReturn(returnArg) {
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return t.callExpression(_this2.file.addHelper("possibleConstructorReturn"), [thisRef].concat(returnArg || []));
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};
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var bodyPaths = body.get("body");
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if (bodyPaths.length && !bodyPaths.pop().isReturnStatement()) {
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body.pushContainer("body", t.returnStatement(guaranteedSuperBeforeFinish ? thisRef : wrapReturn()));
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}
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for (var _iterator5 = this.superReturns, _isArray5 = Array.isArray(_iterator5), _i5 = 0, _iterator5 = _isArray5 ? _iterator5 : (0, _getIterator3.default)(_iterator5);;) {
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var _ref5;
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if (_isArray5) {
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if (_i5 >= _iterator5.length) break;
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_ref5 = _iterator5[_i5++];
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} else {
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_i5 = _iterator5.next();
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if (_i5.done) break;
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_ref5 = _i5.value;
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}
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var returnPath = _ref5;
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if (returnPath.node.argument) {
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var ref = returnPath.scope.generateDeclaredUidIdentifier("ret");
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returnPath.get("argument").replaceWithMultiple([t.assignmentExpression("=", ref, returnPath.node.argument), wrapReturn(ref)]);
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} else {
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returnPath.get("argument").replaceWith(wrapReturn());
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}
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}
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};
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ClassTransformer.prototype.pushMethod = function pushMethod(node, path) {
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var scope = path ? path.scope : this.scope;
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if (node.kind === "method") {
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if (this._processMethod(node, scope)) return;
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}
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this.pushToMap(node, false, null, scope);
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};
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ClassTransformer.prototype._processMethod = function _processMethod() {
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return false;
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};
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ClassTransformer.prototype.pushConstructor = function pushConstructor(replaceSupers, method, path) {
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this.bareSupers = replaceSupers.bareSupers;
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this.superReturns = replaceSupers.returns;
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if (path.scope.hasOwnBinding(this.classRef.name)) {
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path.scope.rename(this.classRef.name);
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}
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var construct = this.constructor;
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this.userConstructorPath = path;
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this.userConstructor = method;
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this.hasConstructor = true;
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t.inheritsComments(construct, method);
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construct._ignoreUserWhitespace = true;
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construct.params = method.params;
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|
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t.inherits(construct.body, method.body);
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construct.body.directives = method.body.directives;
|
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|
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this._pushConstructor();
|
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};
|
|
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ClassTransformer.prototype._pushConstructor = function _pushConstructor() {
|
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if (this.pushedConstructor) return;
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this.pushedConstructor = true;
|
|
|
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if (this.hasInstanceDescriptors || this.hasStaticDescriptors) {
|
|
this.pushDescriptors();
|
|
}
|
|
|
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this.body.push(this.constructor);
|
|
|
|
this.pushInherits();
|
|
};
|
|
|
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ClassTransformer.prototype.pushInherits = function pushInherits() {
|
|
if (!this.isDerived || this.pushedInherits) return;
|
|
|
|
this.pushedInherits = true;
|
|
this.body.unshift(t.expressionStatement(t.callExpression(this.file.addHelper("inherits"), [this.classRef, this.superName])));
|
|
};
|
|
|
|
return ClassTransformer;
|
|
}();
|
|
|
|
exports.default = ClassTransformer;
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module.exports = exports["default"]; |