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36 KiB
1 line
36 KiB
3 years ago
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{"version":3,"file":"event-target-shim.mjs","sources":["../src/event.mjs","../src/event-target.mjs"],"sourcesContent":["/**\n * @typedef {object} PrivateData\n * @property {EventTarget} eventTarget The event target.\n * @property {{type:string}} event The original event object.\n * @property {number} eventPhase The current event phase.\n * @property {EventTarget|null} currentTarget The current event target.\n * @property {boolean} canceled The flag to prevent default.\n * @property {boolean} stopped The flag to stop propagation.\n * @property {boolean} immediateStopped The flag to stop propagation immediately.\n * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.\n * @property {number} timeStamp The unix time.\n * @private\n */\n\n/**\n * Private data for event wrappers.\n * @type {WeakMap<Event, PrivateData>}\n * @private\n */\nconst privateData = new WeakMap()\n\n/**\n * Cache for wrapper classes.\n * @type {WeakMap<Object, Function>}\n * @private\n */\nconst wrappers = new WeakMap()\n\n/**\n * Get private data.\n * @param {Event} event The event object to get private data.\n * @returns {PrivateData} The private data of the event.\n * @private\n */\nfunction pd(event) {\n const retv = privateData.get(event)\n console.assert(\n retv != null,\n \"'this' is expected an Event object, but got\",\n event\n )\n return retv\n}\n\n/**\n * https://dom.spec.whatwg.org/#set-the-canceled-flag\n * @param data {PrivateData} private data.\n */\nfunction setCancelFlag(data) {\n if (data.passiveListener != null) {\n if (\n typeof console !== \"undefined\" &&\n typeof console.error === \"function\"\n ) {\n console.error(\n \"Unable to preventDefault inside passive event listener invocation.\",\n data.passiveListener\n )\n }\n return\n }\n if (!data.event.cancelable) {\n return\n }\n\n data.canceled = true\n if (typeof data.event.preventDefault === \"function\") {\n data.event.preventDefault()\n }\n}\n\n/**\n * @see https://dom.spec.whatwg.org/#interface-event\n * @private\n */\n/**\n * The event wrapper.\n * @constructor\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Event|{type:string}} event The original event to wrap.\n */\nfunction Event(eventTarget, event) {\n privateData.set(this, {\n eventTarget,\n event,\n eventPhase: 2,\n currentTarget: eventTarget,\n canceled: false,\n stopped: false,\n immediateStopped: false,\n passiveListener: null,\n timeStamp: event.timeStamp || Date.now(),\n })\n\n // https://heycam.github.io/webidl/#Unforgeable\n Object.defineProperty(this, \"isTrusted\", { value: false, enumerable: true })\n\n // Define accessors\n const keys = Object.keys(event)\n for (let i = 0; i < keys.length; ++i) {\n const key = keys[i]\n if (!(key in this)) {\n Object.defineProperty(this, key, defineRedirectDescriptor(key))\n }\n }\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEvent.prototype = {\n /**\n * The type of this event.\n * @type {string}\n */\n get type() {\n return pd(this).event.type\n },\n\n /**\n * The target of this event.\n * @type {EventTarget}\n */\n get target() {\n return pd(this).eventTarget\n },\n\n /**\n * The target of this event.\n * @type {EventTarget}\n */\n get currentTarget() {\n return pd(this).currentTarget\n },\n\n /**\n * @returns {EventTarget[]} The composed path of this event.\n */\n composedPath() {\n const currentTarget = pd(this).currentTarget\n if (currentTarget == null) {\n return []\n }\n return [currentTarget]\n },\n\n /**\n * Constant of NONE.\n * @type {number}\n */\n get NONE() {\n return 0\n },\n\n /**\n
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