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400 lines
13 KiB
400 lines
13 KiB
var toArray = require("./toArray");
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var toPropertyKey = require("./toPropertyKey");
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function _decorate(decorators, factory, superClass, mixins) {
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var api = _getDecoratorsApi();
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if (mixins) {
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for (var i = 0; i < mixins.length; i++) {
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api = mixins[i](api);
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}
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}
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var r = factory(function initialize(O) {
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api.initializeInstanceElements(O, decorated.elements);
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}, superClass);
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var decorated = api.decorateClass(_coalesceClassElements(r.d.map(_createElementDescriptor)), decorators);
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api.initializeClassElements(r.F, decorated.elements);
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return api.runClassFinishers(r.F, decorated.finishers);
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}
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function _getDecoratorsApi() {
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_getDecoratorsApi = function _getDecoratorsApi() {
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return api;
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};
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var api = {
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elementsDefinitionOrder: [["method"], ["field"]],
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initializeInstanceElements: function initializeInstanceElements(O, elements) {
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["method", "field"].forEach(function (kind) {
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elements.forEach(function (element) {
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if (element.kind === kind && element.placement === "own") {
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this.defineClassElement(O, element);
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}
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}, this);
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}, this);
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},
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initializeClassElements: function initializeClassElements(F, elements) {
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var proto = F.prototype;
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["method", "field"].forEach(function (kind) {
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elements.forEach(function (element) {
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var placement = element.placement;
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if (element.kind === kind && (placement === "static" || placement === "prototype")) {
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var receiver = placement === "static" ? F : proto;
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this.defineClassElement(receiver, element);
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}
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}, this);
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}, this);
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},
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defineClassElement: function defineClassElement(receiver, element) {
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var descriptor = element.descriptor;
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if (element.kind === "field") {
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var initializer = element.initializer;
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descriptor = {
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enumerable: descriptor.enumerable,
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writable: descriptor.writable,
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configurable: descriptor.configurable,
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value: initializer === void 0 ? void 0 : initializer.call(receiver)
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};
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}
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Object.defineProperty(receiver, element.key, descriptor);
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},
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decorateClass: function decorateClass(elements, decorators) {
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var newElements = [];
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var finishers = [];
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var placements = {
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"static": [],
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prototype: [],
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own: []
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};
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elements.forEach(function (element) {
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this.addElementPlacement(element, placements);
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}, this);
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elements.forEach(function (element) {
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if (!_hasDecorators(element)) return newElements.push(element);
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var elementFinishersExtras = this.decorateElement(element, placements);
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newElements.push(elementFinishersExtras.element);
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newElements.push.apply(newElements, elementFinishersExtras.extras);
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finishers.push.apply(finishers, elementFinishersExtras.finishers);
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}, this);
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if (!decorators) {
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return {
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elements: newElements,
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finishers: finishers
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};
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}
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var result = this.decorateConstructor(newElements, decorators);
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finishers.push.apply(finishers, result.finishers);
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result.finishers = finishers;
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return result;
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},
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addElementPlacement: function addElementPlacement(element, placements, silent) {
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var keys = placements[element.placement];
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if (!silent && keys.indexOf(element.key) !== -1) {
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throw new TypeError("Duplicated element (" + element.key + ")");
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}
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keys.push(element.key);
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},
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decorateElement: function decorateElement(element, placements) {
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var extras = [];
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var finishers = [];
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for (var decorators = element.decorators, i = decorators.length - 1; i >= 0; i--) {
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var keys = placements[element.placement];
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keys.splice(keys.indexOf(element.key), 1);
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var elementObject = this.fromElementDescriptor(element);
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var elementFinisherExtras = this.toElementFinisherExtras((0, decorators[i])(elementObject) || elementObject);
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element = elementFinisherExtras.element;
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this.addElementPlacement(element, placements);
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if (elementFinisherExtras.finisher) {
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finishers.push(elementFinisherExtras.finisher);
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}
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var newExtras = elementFinisherExtras.extras;
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if (newExtras) {
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for (var j = 0; j < newExtras.length; j++) {
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this.addElementPlacement(newExtras[j], placements);
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}
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extras.push.apply(extras, newExtras);
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}
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}
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return {
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element: element,
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finishers: finishers,
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extras: extras
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};
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},
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decorateConstructor: function decorateConstructor(elements, decorators) {
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var finishers = [];
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for (var i = decorators.length - 1; i >= 0; i--) {
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var obj = this.fromClassDescriptor(elements);
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var elementsAndFinisher = this.toClassDescriptor((0, decorators[i])(obj) || obj);
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if (elementsAndFinisher.finisher !== undefined) {
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finishers.push(elementsAndFinisher.finisher);
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}
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if (elementsAndFinisher.elements !== undefined) {
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elements = elementsAndFinisher.elements;
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for (var j = 0; j < elements.length - 1; j++) {
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for (var k = j + 1; k < elements.length; k++) {
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if (elements[j].key === elements[k].key && elements[j].placement === elements[k].placement) {
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throw new TypeError("Duplicated element (" + elements[j].key + ")");
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}
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}
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}
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}
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}
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return {
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elements: elements,
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finishers: finishers
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};
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},
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fromElementDescriptor: function fromElementDescriptor(element) {
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var obj = {
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kind: element.kind,
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key: element.key,
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placement: element.placement,
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descriptor: element.descriptor
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};
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var desc = {
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value: "Descriptor",
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configurable: true
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};
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Object.defineProperty(obj, Symbol.toStringTag, desc);
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if (element.kind === "field") obj.initializer = element.initializer;
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return obj;
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},
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toElementDescriptors: function toElementDescriptors(elementObjects) {
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if (elementObjects === undefined) return;
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return toArray(elementObjects).map(function (elementObject) {
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var element = this.toElementDescriptor(elementObject);
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this.disallowProperty(elementObject, "finisher", "An element descriptor");
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this.disallowProperty(elementObject, "extras", "An element descriptor");
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return element;
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}, this);
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},
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toElementDescriptor: function toElementDescriptor(elementObject) {
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var kind = String(elementObject.kind);
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if (kind !== "method" && kind !== "field") {
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throw new TypeError('An element descriptor\'s .kind property must be either "method" or' + ' "field", but a decorator created an element descriptor with' + ' .kind "' + kind + '"');
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}
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var key = toPropertyKey(elementObject.key);
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var placement = String(elementObject.placement);
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if (placement !== "static" && placement !== "prototype" && placement !== "own") {
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throw new TypeError('An element descriptor\'s .placement property must be one of "static",' + ' "prototype" or "own", but a decorator created an element descriptor' + ' with .placement "' + placement + '"');
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}
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var descriptor = elementObject.descriptor;
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this.disallowProperty(elementObject, "elements", "An element descriptor");
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var element = {
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kind: kind,
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key: key,
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placement: placement,
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descriptor: Object.assign({}, descriptor)
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};
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if (kind !== "field") {
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this.disallowProperty(elementObject, "initializer", "A method descriptor");
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} else {
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this.disallowProperty(descriptor, "get", "The property descriptor of a field descriptor");
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this.disallowProperty(descriptor, "set", "The property descriptor of a field descriptor");
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this.disallowProperty(descriptor, "value", "The property descriptor of a field descriptor");
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element.initializer = elementObject.initializer;
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}
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return element;
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},
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toElementFinisherExtras: function toElementFinisherExtras(elementObject) {
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var element = this.toElementDescriptor(elementObject);
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var finisher = _optionalCallableProperty(elementObject, "finisher");
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var extras = this.toElementDescriptors(elementObject.extras);
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return {
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element: element,
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finisher: finisher,
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extras: extras
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};
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},
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fromClassDescriptor: function fromClassDescriptor(elements) {
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var obj = {
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kind: "class",
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elements: elements.map(this.fromElementDescriptor, this)
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};
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var desc = {
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value: "Descriptor",
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configurable: true
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};
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Object.defineProperty(obj, Symbol.toStringTag, desc);
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return obj;
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},
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toClassDescriptor: function toClassDescriptor(obj) {
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var kind = String(obj.kind);
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if (kind !== "class") {
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throw new TypeError('A class descriptor\'s .kind property must be "class", but a decorator' + ' created a class descriptor with .kind "' + kind + '"');
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}
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this.disallowProperty(obj, "key", "A class descriptor");
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this.disallowProperty(obj, "placement", "A class descriptor");
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this.disallowProperty(obj, "descriptor", "A class descriptor");
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this.disallowProperty(obj, "initializer", "A class descriptor");
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this.disallowProperty(obj, "extras", "A class descriptor");
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var finisher = _optionalCallableProperty(obj, "finisher");
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var elements = this.toElementDescriptors(obj.elements);
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return {
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elements: elements,
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finisher: finisher
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};
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},
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runClassFinishers: function runClassFinishers(constructor, finishers) {
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for (var i = 0; i < finishers.length; i++) {
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var newConstructor = (0, finishers[i])(constructor);
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if (newConstructor !== undefined) {
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if (typeof newConstructor !== "function") {
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throw new TypeError("Finishers must return a constructor.");
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}
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constructor = newConstructor;
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}
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}
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return constructor;
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},
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disallowProperty: function disallowProperty(obj, name, objectType) {
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if (obj[name] !== undefined) {
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throw new TypeError(objectType + " can't have a ." + name + " property.");
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}
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}
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};
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return api;
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}
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function _createElementDescriptor(def) {
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var key = toPropertyKey(def.key);
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var descriptor;
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if (def.kind === "method") {
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descriptor = {
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value: def.value,
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writable: true,
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configurable: true,
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enumerable: false
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};
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} else if (def.kind === "get") {
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descriptor = {
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get: def.value,
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configurable: true,
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enumerable: false
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};
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} else if (def.kind === "set") {
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descriptor = {
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set: def.value,
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configurable: true,
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enumerable: false
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};
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} else if (def.kind === "field") {
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descriptor = {
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configurable: true,
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writable: true,
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enumerable: true
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};
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}
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var element = {
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kind: def.kind === "field" ? "field" : "method",
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key: key,
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placement: def["static"] ? "static" : def.kind === "field" ? "own" : "prototype",
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descriptor: descriptor
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};
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if (def.decorators) element.decorators = def.decorators;
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if (def.kind === "field") element.initializer = def.value;
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return element;
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}
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function _coalesceGetterSetter(element, other) {
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if (element.descriptor.get !== undefined) {
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other.descriptor.get = element.descriptor.get;
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} else {
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other.descriptor.set = element.descriptor.set;
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}
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}
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function _coalesceClassElements(elements) {
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var newElements = [];
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var isSameElement = function isSameElement(other) {
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return other.kind === "method" && other.key === element.key && other.placement === element.placement;
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};
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for (var i = 0; i < elements.length; i++) {
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var element = elements[i];
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var other;
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if (element.kind === "method" && (other = newElements.find(isSameElement))) {
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if (_isDataDescriptor(element.descriptor) || _isDataDescriptor(other.descriptor)) {
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if (_hasDecorators(element) || _hasDecorators(other)) {
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throw new ReferenceError("Duplicated methods (" + element.key + ") can't be decorated.");
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}
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other.descriptor = element.descriptor;
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} else {
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if (_hasDecorators(element)) {
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if (_hasDecorators(other)) {
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throw new ReferenceError("Decorators can't be placed on different accessors with for " + "the same property (" + element.key + ").");
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}
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other.decorators = element.decorators;
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}
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_coalesceGetterSetter(element, other);
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}
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} else {
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newElements.push(element);
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}
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}
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return newElements;
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}
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function _hasDecorators(element) {
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return element.decorators && element.decorators.length;
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}
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function _isDataDescriptor(desc) {
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return desc !== undefined && !(desc.value === undefined && desc.writable === undefined);
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}
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function _optionalCallableProperty(obj, name) {
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var value = obj[name];
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if (value !== undefined && typeof value !== "function") {
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throw new TypeError("Expected '" + name + "' to be a function");
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}
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return value;
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}
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module.exports = _decorate;
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