mirror of
https://github.com/denoland/deno.git
synced 2024-12-25 00:29:09 -05:00
d832d2bfd1
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
1262 lines
30 KiB
JavaScript
1262 lines
30 KiB
JavaScript
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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// This module follows most of the WHATWG Living Standard for the DOM logic.
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// Many parts of the DOM are not implemented in Deno, but the logic for those
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// parts still exists. This means you will observe a lot of strange structures
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// and impossible logic branches based on what Deno currently supports.
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"use strict";
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((window) => {
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const webidl = window.__bootstrap.webidl;
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// accessors for non runtime visible data
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function getDispatched(event) {
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return Boolean(event[_dispatched]);
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}
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function getPath(event) {
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return event[_path] ?? [];
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}
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function getStopImmediatePropagation(event) {
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return Boolean(event[_stopImmediatePropagationFlag]);
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}
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function setCurrentTarget(
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event,
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value,
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) {
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event[_attributes].currentTarget = value;
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}
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function setIsTrusted(event, value) {
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event[_isTrusted] = value;
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}
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function setDispatched(event, value) {
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event[_dispatched] = value;
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}
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function setEventPhase(event, value) {
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event[_attributes].eventPhase = value;
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}
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function setInPassiveListener(event, value) {
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event[_inPassiveListener] = value;
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}
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function setPath(event, value) {
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event[_path] = value;
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}
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function setRelatedTarget(
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event,
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value,
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) {
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event[_attributes].relatedTarget = value;
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}
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function setTarget(event, value) {
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event[_attributes].target = value;
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}
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function setStopImmediatePropagation(
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event,
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value,
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) {
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event[_stopImmediatePropagationFlag] = value;
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}
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// Type guards that widen the event type
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function hasRelatedTarget(
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event,
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) {
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return "relatedTarget" in event;
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}
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const isTrusted = Object.getOwnPropertyDescriptor({
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get isTrusted() {
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return this[_isTrusted];
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},
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}, "isTrusted").get;
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const eventInitConverter = webidl.createDictionaryConverter("EventInit", [{
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key: "bubbles",
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defaultValue: false,
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converter: webidl.converters.boolean,
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}, {
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key: "cancelable",
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defaultValue: false,
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converter: webidl.converters.boolean,
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}, {
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key: "composed",
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defaultValue: false,
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converter: webidl.converters.boolean,
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}]);
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const _attributes = Symbol("[[attributes]]");
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const _canceledFlag = Symbol("[[canceledFlag]]");
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const _stopPropagationFlag = Symbol("[[stopPropagationFlag]]");
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const _stopImmediatePropagationFlag = Symbol(
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"[[stopImmediatePropagationFlag]]",
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);
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const _inPassiveListener = Symbol("[[inPassiveListener]]");
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const _dispatched = Symbol("[[dispatched]]");
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const _isTrusted = Symbol("[[isTrusted]]");
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const _path = Symbol("[[path]]");
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class Event {
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[_attributes] = {};
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[_canceledFlag] = false;
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[_stopPropagationFlag] = false;
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[_stopImmediatePropagationFlag] = false;
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[_inPassiveListener] = false;
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[_dispatched] = false;
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[_isTrusted] = false;
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[_path] = [];
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constructor(type, eventInitDict = {}) {
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webidl.requiredArguments(arguments.length, 1, {
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prefix: "Failed to construct 'Event'",
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});
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type = webidl.converters.DOMString(type, {
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prefix: "Failed to construct 'Event'",
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context: "Argument 1",
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});
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const eventInit = eventInitConverter(eventInitDict, {
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prefix: "Failed to construct 'Event'",
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context: "Argument 2",
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});
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this[_attributes] = {
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type,
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...eventInit,
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currentTarget: null,
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eventPhase: Event.NONE,
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target: null,
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timeStamp: Date.now(),
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};
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Reflect.defineProperty(this, "isTrusted", {
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enumerable: true,
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get: isTrusted,
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});
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}
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[Symbol.for("Deno.privateCustomInspect")](inspect) {
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return inspect(buildFilteredPropertyInspectObject(this, EVENT_PROPS));
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}
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get type() {
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return this[_attributes].type;
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}
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get target() {
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return this[_attributes].target;
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}
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get srcElement() {
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return null;
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}
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set srcElement(_) {
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// this member is deprecated
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}
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get currentTarget() {
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return this[_attributes].currentTarget;
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}
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composedPath() {
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const path = this[_path];
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if (path.length === 0) {
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return [];
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}
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if (!this.currentTarget) {
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throw new Error("assertion error");
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}
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const composedPath = [
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{
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item: this.currentTarget,
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itemInShadowTree: false,
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relatedTarget: null,
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rootOfClosedTree: false,
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slotInClosedTree: false,
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target: null,
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touchTargetList: [],
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},
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];
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let currentTargetIndex = 0;
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let currentTargetHiddenSubtreeLevel = 0;
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for (let index = path.length - 1; index >= 0; index--) {
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const { item, rootOfClosedTree, slotInClosedTree } = path[index];
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if (rootOfClosedTree) {
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currentTargetHiddenSubtreeLevel++;
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}
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if (item === this.currentTarget) {
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currentTargetIndex = index;
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break;
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}
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if (slotInClosedTree) {
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currentTargetHiddenSubtreeLevel--;
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}
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}
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let currentHiddenLevel = currentTargetHiddenSubtreeLevel;
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let maxHiddenLevel = currentTargetHiddenSubtreeLevel;
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for (let i = currentTargetIndex - 1; i >= 0; i--) {
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const { item, rootOfClosedTree, slotInClosedTree } = path[i];
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if (rootOfClosedTree) {
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currentHiddenLevel++;
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}
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if (currentHiddenLevel <= maxHiddenLevel) {
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composedPath.unshift({
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item,
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itemInShadowTree: false,
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relatedTarget: null,
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rootOfClosedTree: false,
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slotInClosedTree: false,
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target: null,
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touchTargetList: [],
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});
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}
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if (slotInClosedTree) {
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currentHiddenLevel--;
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if (currentHiddenLevel < maxHiddenLevel) {
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maxHiddenLevel = currentHiddenLevel;
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}
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}
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}
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currentHiddenLevel = currentTargetHiddenSubtreeLevel;
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maxHiddenLevel = currentTargetHiddenSubtreeLevel;
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for (let index = currentTargetIndex + 1; index < path.length; index++) {
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const { item, rootOfClosedTree, slotInClosedTree } = path[index];
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if (slotInClosedTree) {
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currentHiddenLevel++;
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}
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if (currentHiddenLevel <= maxHiddenLevel) {
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composedPath.push({
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item,
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itemInShadowTree: false,
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relatedTarget: null,
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rootOfClosedTree: false,
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slotInClosedTree: false,
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target: null,
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touchTargetList: [],
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});
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}
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if (rootOfClosedTree) {
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currentHiddenLevel--;
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if (currentHiddenLevel < maxHiddenLevel) {
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maxHiddenLevel = currentHiddenLevel;
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}
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}
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}
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return composedPath.map((p) => p.item);
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}
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get NONE() {
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return Event.NONE;
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}
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get CAPTURING_PHASE() {
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return Event.CAPTURING_PHASE;
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}
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get AT_TARGET() {
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return Event.AT_TARGET;
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}
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get BUBBLING_PHASE() {
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return Event.BUBBLING_PHASE;
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}
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static get NONE() {
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return 0;
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}
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static get CAPTURING_PHASE() {
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return 1;
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}
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static get AT_TARGET() {
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return 2;
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}
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static get BUBBLING_PHASE() {
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return 3;
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}
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get eventPhase() {
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return this[_attributes].eventPhase;
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}
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stopPropagation() {
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this[_stopPropagationFlag] = true;
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}
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get cancelBubble() {
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return this[_stopPropagationFlag];
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}
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set cancelBubble(value) {
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this[_stopPropagationFlag] = webidl.converters.boolean(value);
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}
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stopImmediatePropagation() {
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this[_stopPropagationFlag] = true;
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this[_stopImmediatePropagationFlag] = true;
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}
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get bubbles() {
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return this[_attributes].bubbles;
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}
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get cancelable() {
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return this[_attributes].cancelable;
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}
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get returnValue() {
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return !this[_canceledFlag];
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}
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set returnValue(value) {
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if (!webidl.converters.boolean(value)) {
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this[_canceledFlag] = true;
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}
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}
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preventDefault() {
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if (this[_attributes].cancelable && !this[_inPassiveListener]) {
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this[_canceledFlag] = true;
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}
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}
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get defaultPrevented() {
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return this[_canceledFlag];
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}
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get composed() {
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return this[_attributes].composed;
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}
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get initialized() {
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return true;
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}
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get timeStamp() {
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return this[_attributes].timeStamp;
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}
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}
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function buildFilteredPropertyInspectObject(object, keys) {
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// forward the subset of properties from `object` without evaluating
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// as evaluation could lead to an error, which is better handled
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// in the inspect code
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return new Proxy({}, {
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get(_target, key) {
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if (key === Symbol.toStringTag) {
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return object.constructor?.name;
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} else if (keys.includes(key)) {
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return Reflect.get(object, key);
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} else {
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return undefined;
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}
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},
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getOwnPropertyDescriptor(_target, key) {
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if (!keys.includes(key)) {
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return undefined;
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}
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return Reflect.getOwnPropertyDescriptor(object, key) ??
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(object.prototype &&
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Reflect.getOwnPropertyDescriptor(object.prototype, key)) ??
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{
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configurable: true,
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enumerable: true,
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value: object[key],
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};
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},
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has(_target, key) {
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return keys.includes(key);
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},
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ownKeys() {
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return keys;
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},
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});
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}
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function defineEnumerableProps(
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Ctor,
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props,
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) {
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for (const prop of props) {
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Reflect.defineProperty(Ctor.prototype, prop, { enumerable: true });
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}
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}
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const EVENT_PROPS = [
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"bubbles",
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"cancelable",
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"composed",
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"currentTarget",
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"defaultPrevented",
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"eventPhase",
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"srcElement",
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"target",
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"returnValue",
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"timeStamp",
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"type",
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];
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defineEnumerableProps(Event, EVENT_PROPS);
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// This is currently the only node type we are using, so instead of implementing
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// the whole of the Node interface at the moment, this just gives us the one
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// value to power the standards based logic
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const DOCUMENT_FRAGMENT_NODE = 11;
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// DOM Logic Helper functions and type guards
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/** Get the parent node, for event targets that have a parent.
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*
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* Ref: https://dom.spec.whatwg.org/#get-the-parent */
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function getParent(eventTarget) {
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return isNode(eventTarget) ? eventTarget.parentNode : null;
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}
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function getRoot(eventTarget) {
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return isNode(eventTarget)
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? eventTarget.getRootNode({ composed: true })
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: null;
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}
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function isNode(
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eventTarget,
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) {
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return Boolean(eventTarget && "nodeType" in eventTarget);
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}
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// https://dom.spec.whatwg.org/#concept-shadow-including-inclusive-ancestor
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function isShadowInclusiveAncestor(
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ancestor,
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node,
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) {
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while (isNode(node)) {
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if (node === ancestor) {
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return true;
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}
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if (isShadowRoot(node)) {
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node = node && getHost(node);
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} else {
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node = getParent(node);
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}
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}
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return false;
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}
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function isShadowRoot(nodeImpl) {
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return Boolean(
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nodeImpl &&
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isNode(nodeImpl) &&
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nodeImpl.nodeType === DOCUMENT_FRAGMENT_NODE &&
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getHost(nodeImpl) != null,
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);
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}
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function isSlotable(
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nodeImpl,
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) {
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return Boolean(isNode(nodeImpl) && "assignedSlot" in nodeImpl);
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}
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|
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// DOM Logic functions
|
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/** Append a path item to an event's path.
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*
|
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* Ref: https://dom.spec.whatwg.org/#concept-event-path-append
|
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*/
|
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function appendToEventPath(
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eventImpl,
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target,
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targetOverride,
|
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relatedTarget,
|
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touchTargets,
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slotInClosedTree,
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) {
|
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const itemInShadowTree = isNode(target) && isShadowRoot(getRoot(target));
|
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const rootOfClosedTree = isShadowRoot(target) &&
|
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getMode(target) === "closed";
|
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|
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getPath(eventImpl).push({
|
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item: target,
|
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itemInShadowTree,
|
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target: targetOverride,
|
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relatedTarget,
|
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touchTargetList: touchTargets,
|
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rootOfClosedTree,
|
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slotInClosedTree,
|
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});
|
||
}
|
||
|
||
function dispatch(
|
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targetImpl,
|
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eventImpl,
|
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targetOverride,
|
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) {
|
||
let clearTargets = false;
|
||
let activationTarget = null;
|
||
|
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setDispatched(eventImpl, true);
|
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|
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targetOverride = targetOverride ?? targetImpl;
|
||
const eventRelatedTarget = hasRelatedTarget(eventImpl)
|
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? eventImpl.relatedTarget
|
||
: null;
|
||
let relatedTarget = retarget(eventRelatedTarget, targetImpl);
|
||
|
||
if (targetImpl !== relatedTarget || targetImpl === eventRelatedTarget) {
|
||
const touchTargets = [];
|
||
|
||
appendToEventPath(
|
||
eventImpl,
|
||
targetImpl,
|
||
targetOverride,
|
||
relatedTarget,
|
||
touchTargets,
|
||
false,
|
||
);
|
||
|
||
const isActivationEvent = eventImpl.type === "click";
|
||
|
||
if (isActivationEvent && getHasActivationBehavior(targetImpl)) {
|
||
activationTarget = targetImpl;
|
||
}
|
||
|
||
let slotInClosedTree = false;
|
||
let slotable = isSlotable(targetImpl) && getAssignedSlot(targetImpl)
|
||
? targetImpl
|
||
: null;
|
||
let parent = getParent(targetImpl);
|
||
|
||
// Populate event path
|
||
// https://dom.spec.whatwg.org/#event-path
|
||
while (parent !== null) {
|
||
if (slotable !== null) {
|
||
slotable = null;
|
||
|
||
const parentRoot = getRoot(parent);
|
||
if (
|
||
isShadowRoot(parentRoot) &&
|
||
parentRoot &&
|
||
getMode(parentRoot) === "closed"
|
||
) {
|
||
slotInClosedTree = true;
|
||
}
|
||
}
|
||
|
||
relatedTarget = retarget(eventRelatedTarget, parent);
|
||
|
||
if (
|
||
isNode(parent) &&
|
||
isShadowInclusiveAncestor(getRoot(targetImpl), parent)
|
||
) {
|
||
appendToEventPath(
|
||
eventImpl,
|
||
parent,
|
||
null,
|
||
relatedTarget,
|
||
touchTargets,
|
||
slotInClosedTree,
|
||
);
|
||
} else if (parent === relatedTarget) {
|
||
parent = null;
|
||
} else {
|
||
targetImpl = parent;
|
||
|
||
if (
|
||
isActivationEvent &&
|
||
activationTarget === null &&
|
||
getHasActivationBehavior(targetImpl)
|
||
) {
|
||
activationTarget = targetImpl;
|
||
}
|
||
|
||
appendToEventPath(
|
||
eventImpl,
|
||
parent,
|
||
targetImpl,
|
||
relatedTarget,
|
||
touchTargets,
|
||
slotInClosedTree,
|
||
);
|
||
}
|
||
|
||
if (parent !== null) {
|
||
parent = getParent(parent);
|
||
}
|
||
|
||
slotInClosedTree = false;
|
||
}
|
||
|
||
let clearTargetsTupleIndex = -1;
|
||
const path = getPath(eventImpl);
|
||
for (
|
||
let i = path.length - 1;
|
||
i >= 0 && clearTargetsTupleIndex === -1;
|
||
i--
|
||
) {
|
||
if (path[i].target !== null) {
|
||
clearTargetsTupleIndex = i;
|
||
}
|
||
}
|
||
const clearTargetsTuple = path[clearTargetsTupleIndex];
|
||
|
||
clearTargets = (isNode(clearTargetsTuple.target) &&
|
||
isShadowRoot(getRoot(clearTargetsTuple.target))) ||
|
||
(isNode(clearTargetsTuple.relatedTarget) &&
|
||
isShadowRoot(getRoot(clearTargetsTuple.relatedTarget)));
|
||
|
||
setEventPhase(eventImpl, Event.CAPTURING_PHASE);
|
||
|
||
for (let i = path.length - 1; i >= 0; --i) {
|
||
const tuple = path[i];
|
||
|
||
if (tuple.target === null) {
|
||
invokeEventListeners(tuple, eventImpl);
|
||
}
|
||
}
|
||
|
||
for (let i = 0; i < path.length; i++) {
|
||
const tuple = path[i];
|
||
|
||
if (tuple.target !== null) {
|
||
setEventPhase(eventImpl, Event.AT_TARGET);
|
||
} else {
|
||
setEventPhase(eventImpl, Event.BUBBLING_PHASE);
|
||
}
|
||
|
||
if (
|
||
(eventImpl.eventPhase === Event.BUBBLING_PHASE &&
|
||
eventImpl.bubbles) ||
|
||
eventImpl.eventPhase === Event.AT_TARGET
|
||
) {
|
||
invokeEventListeners(tuple, eventImpl);
|
||
}
|
||
}
|
||
}
|
||
|
||
setEventPhase(eventImpl, Event.NONE);
|
||
setCurrentTarget(eventImpl, null);
|
||
setPath(eventImpl, []);
|
||
setDispatched(eventImpl, false);
|
||
eventImpl.cancelBubble = false;
|
||
setStopImmediatePropagation(eventImpl, false);
|
||
|
||
if (clearTargets) {
|
||
setTarget(eventImpl, null);
|
||
setRelatedTarget(eventImpl, null);
|
||
}
|
||
|
||
// TODO(bartlomieju): invoke activation targets if HTML nodes will be implemented
|
||
// if (activationTarget !== null) {
|
||
// if (!eventImpl.defaultPrevented) {
|
||
// activationTarget._activationBehavior();
|
||
// }
|
||
// }
|
||
|
||
return !eventImpl.defaultPrevented;
|
||
}
|
||
|
||
/** Inner invoking of the event listeners where the resolved listeners are
|
||
* called.
|
||
*
|
||
* Ref: https://dom.spec.whatwg.org/#concept-event-listener-inner-invoke */
|
||
function innerInvokeEventListeners(
|
||
eventImpl,
|
||
targetListeners,
|
||
) {
|
||
let found = false;
|
||
|
||
const { type } = eventImpl;
|
||
|
||
if (!targetListeners || !targetListeners[type]) {
|
||
return found;
|
||
}
|
||
|
||
// Copy event listeners before iterating since the list can be modified during the iteration.
|
||
const handlers = targetListeners[type].slice();
|
||
|
||
for (let i = 0; i < handlers.length; i++) {
|
||
const listener = handlers[i];
|
||
|
||
let capture, once, passive;
|
||
if (typeof listener.options === "boolean") {
|
||
capture = listener.options;
|
||
once = false;
|
||
passive = false;
|
||
} else {
|
||
capture = listener.options.capture;
|
||
once = listener.options.once;
|
||
passive = listener.options.passive;
|
||
}
|
||
|
||
// Check if the event listener has been removed since the listeners has been cloned.
|
||
if (!targetListeners[type].includes(listener)) {
|
||
continue;
|
||
}
|
||
|
||
found = true;
|
||
|
||
if (
|
||
(eventImpl.eventPhase === Event.CAPTURING_PHASE && !capture) ||
|
||
(eventImpl.eventPhase === Event.BUBBLING_PHASE && capture)
|
||
) {
|
||
continue;
|
||
}
|
||
|
||
if (once) {
|
||
targetListeners[type].splice(
|
||
targetListeners[type].indexOf(listener),
|
||
1,
|
||
);
|
||
}
|
||
|
||
if (passive) {
|
||
setInPassiveListener(eventImpl, true);
|
||
}
|
||
|
||
if (typeof listener.callback === "object") {
|
||
if (typeof listener.callback.handleEvent === "function") {
|
||
listener.callback.handleEvent(eventImpl);
|
||
}
|
||
} else {
|
||
listener.callback.call(eventImpl.currentTarget, eventImpl);
|
||
}
|
||
|
||
setInPassiveListener(eventImpl, false);
|
||
|
||
if (getStopImmediatePropagation(eventImpl)) {
|
||
return found;
|
||
}
|
||
}
|
||
|
||
return found;
|
||
}
|
||
|
||
/** Invokes the listeners on a given event path with the supplied event.
|
||
*
|
||
* Ref: https://dom.spec.whatwg.org/#concept-event-listener-invoke */
|
||
function invokeEventListeners(tuple, eventImpl) {
|
||
const path = getPath(eventImpl);
|
||
const tupleIndex = path.indexOf(tuple);
|
||
for (let i = tupleIndex; i >= 0; i--) {
|
||
const t = path[i];
|
||
if (t.target) {
|
||
setTarget(eventImpl, t.target);
|
||
break;
|
||
}
|
||
}
|
||
|
||
setRelatedTarget(eventImpl, tuple.relatedTarget);
|
||
|
||
if (eventImpl.cancelBubble) {
|
||
return;
|
||
}
|
||
|
||
setCurrentTarget(eventImpl, tuple.item);
|
||
|
||
innerInvokeEventListeners(eventImpl, getListeners(tuple.item));
|
||
}
|
||
|
||
function normalizeAddEventHandlerOptions(
|
||
options,
|
||
) {
|
||
if (typeof options === "boolean" || typeof options === "undefined") {
|
||
return {
|
||
capture: Boolean(options),
|
||
once: false,
|
||
passive: false,
|
||
};
|
||
} else {
|
||
return options;
|
||
}
|
||
}
|
||
|
||
function normalizeEventHandlerOptions(
|
||
options,
|
||
) {
|
||
if (typeof options === "boolean" || typeof options === "undefined") {
|
||
return {
|
||
capture: Boolean(options),
|
||
};
|
||
} else {
|
||
return options;
|
||
}
|
||
}
|
||
|
||
/** Retarget the target following the spec logic.
|
||
*
|
||
* Ref: https://dom.spec.whatwg.org/#retarget */
|
||
function retarget(a, b) {
|
||
while (true) {
|
||
if (!isNode(a)) {
|
||
return a;
|
||
}
|
||
|
||
const aRoot = a.getRootNode();
|
||
|
||
if (aRoot) {
|
||
if (
|
||
!isShadowRoot(aRoot) ||
|
||
(isNode(b) && isShadowInclusiveAncestor(aRoot, b))
|
||
) {
|
||
return a;
|
||
}
|
||
|
||
a = getHost(aRoot);
|
||
}
|
||
}
|
||
}
|
||
|
||
// Accessors for non-public data
|
||
|
||
const eventTargetData = new WeakMap();
|
||
|
||
function setEventTargetData(value) {
|
||
eventTargetData.set(value, getDefaultTargetData());
|
||
}
|
||
|
||
function getAssignedSlot(target) {
|
||
return Boolean(eventTargetData.get(target)?.assignedSlot);
|
||
}
|
||
|
||
function getHasActivationBehavior(target) {
|
||
return Boolean(
|
||
eventTargetData.get(target)?.hasActivationBehavior,
|
||
);
|
||
}
|
||
|
||
function getHost(target) {
|
||
return eventTargetData.get(target)?.host ?? null;
|
||
}
|
||
|
||
function getListeners(target) {
|
||
return eventTargetData.get(target)?.listeners ?? {};
|
||
}
|
||
|
||
function getMode(target) {
|
||
return eventTargetData.get(target)?.mode ?? null;
|
||
}
|
||
|
||
function getDefaultTargetData() {
|
||
return {
|
||
assignedSlot: false,
|
||
hasActivationBehavior: false,
|
||
host: null,
|
||
listeners: Object.create(null),
|
||
mode: "",
|
||
};
|
||
}
|
||
|
||
class EventTarget {
|
||
constructor() {
|
||
eventTargetData.set(this, getDefaultTargetData());
|
||
}
|
||
|
||
addEventListener(
|
||
type,
|
||
callback,
|
||
options,
|
||
) {
|
||
webidl.requiredArguments(arguments.length, 2, {
|
||
prefix: "Failed to execute 'addEventListener' on 'EventTarget'",
|
||
});
|
||
if (callback === null) {
|
||
return;
|
||
}
|
||
|
||
options = normalizeAddEventHandlerOptions(options);
|
||
const { listeners } = eventTargetData.get(this ?? globalThis);
|
||
|
||
if (!(type in listeners)) {
|
||
listeners[type] = [];
|
||
}
|
||
|
||
for (const listener of listeners[type]) {
|
||
if (
|
||
((typeof listener.options === "boolean" &&
|
||
listener.options === options.capture) ||
|
||
(typeof listener.options === "object" &&
|
||
listener.options.capture === options.capture)) &&
|
||
listener.callback === callback
|
||
) {
|
||
return;
|
||
}
|
||
}
|
||
if (options?.signal) {
|
||
const signal = options?.signal;
|
||
if (signal.aborted) {
|
||
// If signal is not null and its aborted flag is set, then return.
|
||
return;
|
||
} else {
|
||
// If listener’s signal is not null, then add the following abort
|
||
// abort steps to it: Remove an event listener.
|
||
signal.addEventListener("abort", () => {
|
||
this.removeEventListener(type, callback, options);
|
||
});
|
||
}
|
||
}
|
||
listeners[type].push({ callback, options });
|
||
}
|
||
|
||
removeEventListener(
|
||
type,
|
||
callback,
|
||
options,
|
||
) {
|
||
webidl.requiredArguments(arguments.length, 2, {
|
||
prefix: "Failed to execute 'removeEventListener' on 'EventTarget'",
|
||
});
|
||
|
||
const listeners = eventTargetData.get(this ?? globalThis).listeners;
|
||
if (callback !== null && type in listeners) {
|
||
listeners[type] = listeners[type].filter(
|
||
(listener) => listener.callback !== callback,
|
||
);
|
||
} else if (callback === null || !listeners[type]) {
|
||
return;
|
||
}
|
||
|
||
options = normalizeEventHandlerOptions(options);
|
||
|
||
for (let i = 0; i < listeners[type].length; ++i) {
|
||
const listener = listeners[type][i];
|
||
if (
|
||
((typeof listener.options === "boolean" &&
|
||
listener.options === options.capture) ||
|
||
(typeof listener.options === "object" &&
|
||
listener.options.capture === options.capture)) &&
|
||
listener.callback === callback
|
||
) {
|
||
listeners[type].splice(i, 1);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
dispatchEvent(event) {
|
||
webidl.requiredArguments(arguments.length, 1, {
|
||
prefix: "Failed to execute 'dispatchEvent' on 'EventTarget'",
|
||
});
|
||
const self = this ?? globalThis;
|
||
|
||
const listeners = eventTargetData.get(self).listeners;
|
||
if (!(event.type in listeners)) {
|
||
setTarget(event, this);
|
||
return true;
|
||
}
|
||
|
||
if (getDispatched(event)) {
|
||
throw new DOMException("Invalid event state.", "InvalidStateError");
|
||
}
|
||
|
||
if (event.eventPhase !== Event.NONE) {
|
||
throw new DOMException("Invalid event state.", "InvalidStateError");
|
||
}
|
||
|
||
return dispatch(self, event);
|
||
}
|
||
|
||
get [Symbol.toStringTag]() {
|
||
return "EventTarget";
|
||
}
|
||
|
||
getParent(_event) {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
defineEnumerableProps(EventTarget, [
|
||
"addEventListener",
|
||
"removeEventListener",
|
||
"dispatchEvent",
|
||
]);
|
||
|
||
class ErrorEvent extends Event {
|
||
#message = "";
|
||
#filename = "";
|
||
#lineno = "";
|
||
#colno = "";
|
||
#error = "";
|
||
|
||
get message() {
|
||
return this.#message;
|
||
}
|
||
get filename() {
|
||
return this.#filename;
|
||
}
|
||
get lineno() {
|
||
return this.#lineno;
|
||
}
|
||
get colno() {
|
||
return this.#colno;
|
||
}
|
||
get error() {
|
||
return this.#error;
|
||
}
|
||
|
||
constructor(
|
||
type,
|
||
{
|
||
bubbles,
|
||
cancelable,
|
||
composed,
|
||
message = "",
|
||
filename = "",
|
||
lineno = 0,
|
||
colno = 0,
|
||
error = null,
|
||
} = {},
|
||
) {
|
||
super(type, {
|
||
bubbles: bubbles,
|
||
cancelable: cancelable,
|
||
composed: composed,
|
||
});
|
||
|
||
this.#message = message;
|
||
this.#filename = filename;
|
||
this.#lineno = lineno;
|
||
this.#colno = colno;
|
||
this.#error = error;
|
||
}
|
||
|
||
get [Symbol.toStringTag]() {
|
||
return "ErrorEvent";
|
||
}
|
||
|
||
[Symbol.for("Deno.privateCustomInspect")](inspect) {
|
||
return inspect(buildFilteredPropertyInspectObject(this, [
|
||
...EVENT_PROPS,
|
||
"message",
|
||
"filename",
|
||
"lineno",
|
||
"colno",
|
||
"error",
|
||
]));
|
||
}
|
||
}
|
||
|
||
defineEnumerableProps(ErrorEvent, [
|
||
"message",
|
||
"filename",
|
||
"lineno",
|
||
"colno",
|
||
"error",
|
||
]);
|
||
|
||
class CloseEvent extends Event {
|
||
#wasClean = "";
|
||
#code = "";
|
||
#reason = "";
|
||
|
||
get wasClean() {
|
||
return this.#wasClean;
|
||
}
|
||
get code() {
|
||
return this.#code;
|
||
}
|
||
get reason() {
|
||
return this.#reason;
|
||
}
|
||
|
||
constructor(type, {
|
||
bubbles,
|
||
cancelable,
|
||
composed,
|
||
wasClean = false,
|
||
code = 0,
|
||
reason = "",
|
||
} = {}) {
|
||
super(type, {
|
||
bubbles: bubbles,
|
||
cancelable: cancelable,
|
||
composed: composed,
|
||
});
|
||
|
||
this.#wasClean = wasClean;
|
||
this.#code = code;
|
||
this.#reason = reason;
|
||
}
|
||
|
||
[Symbol.for("Deno.privateCustomInspect")](inspect) {
|
||
return inspect(buildFilteredPropertyInspectObject(this, [
|
||
...EVENT_PROPS,
|
||
"wasClean",
|
||
"code",
|
||
"reason",
|
||
]));
|
||
}
|
||
}
|
||
|
||
class MessageEvent extends Event {
|
||
get source() {
|
||
return null;
|
||
}
|
||
|
||
constructor(type, eventInitDict) {
|
||
super(type, {
|
||
bubbles: eventInitDict?.bubbles ?? false,
|
||
cancelable: eventInitDict?.cancelable ?? false,
|
||
composed: eventInitDict?.composed ?? false,
|
||
});
|
||
|
||
this.data = eventInitDict?.data ?? null;
|
||
this.ports = eventInitDict?.ports ?? [];
|
||
this.origin = eventInitDict?.origin ?? "";
|
||
this.lastEventId = eventInitDict?.lastEventId ?? "";
|
||
}
|
||
|
||
[Symbol.for("Deno.privateCustomInspect")](inspect) {
|
||
return inspect(buildFilteredPropertyInspectObject(this, [
|
||
...EVENT_PROPS,
|
||
"data",
|
||
"origin",
|
||
"lastEventId",
|
||
]));
|
||
}
|
||
}
|
||
|
||
class CustomEvent extends Event {
|
||
#detail = null;
|
||
|
||
constructor(type, eventInitDict = {}) {
|
||
super(type, eventInitDict);
|
||
webidl.requiredArguments(arguments.length, 1, {
|
||
prefix: "Failed to construct 'CustomEvent'",
|
||
});
|
||
const { detail } = eventInitDict;
|
||
this.#detail = detail;
|
||
}
|
||
|
||
get detail() {
|
||
return this.#detail;
|
||
}
|
||
|
||
get [Symbol.toStringTag]() {
|
||
return "CustomEvent";
|
||
}
|
||
|
||
[Symbol.for("Deno.privateCustomInspect")](inspect) {
|
||
return inspect(buildFilteredPropertyInspectObject(this, [
|
||
...EVENT_PROPS,
|
||
"detail",
|
||
]));
|
||
}
|
||
}
|
||
|
||
Reflect.defineProperty(CustomEvent.prototype, "detail", {
|
||
enumerable: true,
|
||
});
|
||
|
||
// ProgressEvent could also be used in other DOM progress event emits.
|
||
// Current use is for FileReader.
|
||
class ProgressEvent extends Event {
|
||
constructor(type, eventInitDict = {}) {
|
||
super(type, eventInitDict);
|
||
|
||
this.lengthComputable = eventInitDict?.lengthComputable ?? false;
|
||
this.loaded = eventInitDict?.loaded ?? 0;
|
||
this.total = eventInitDict?.total ?? 0;
|
||
}
|
||
|
||
[Symbol.for("Deno.privateCustomInspect")](inspect) {
|
||
return inspect(buildFilteredPropertyInspectObject(this, [
|
||
...EVENT_PROPS,
|
||
"lengthComputable",
|
||
"loaded",
|
||
"total",
|
||
]));
|
||
}
|
||
}
|
||
|
||
const _eventHandlers = Symbol("eventHandlers");
|
||
|
||
function makeWrappedHandler(handler) {
|
||
function wrappedHandler(...args) {
|
||
if (typeof wrappedHandler.handler !== "function") {
|
||
return;
|
||
}
|
||
return wrappedHandler.handler.call(this, ...args);
|
||
}
|
||
wrappedHandler.handler = handler;
|
||
return wrappedHandler;
|
||
}
|
||
|
||
// TODO(benjamingr) reuse this here and websocket where possible
|
||
function defineEventHandler(emitter, name, init) {
|
||
// HTML specification section 8.1.5.1
|
||
Object.defineProperty(emitter, `on${name}`, {
|
||
get() {
|
||
return this[_eventHandlers]?.get(name)?.handler;
|
||
},
|
||
set(value) {
|
||
if (!this[_eventHandlers]) {
|
||
this[_eventHandlers] = new Map();
|
||
}
|
||
let handlerWrapper = this[_eventHandlers]?.get(name);
|
||
if (handlerWrapper) {
|
||
console.log("foo");
|
||
handlerWrapper.handler = value;
|
||
} else {
|
||
handlerWrapper = makeWrappedHandler(value);
|
||
this.addEventListener(name, handlerWrapper);
|
||
init?.(this);
|
||
}
|
||
this[_eventHandlers].set(name, handlerWrapper);
|
||
},
|
||
configurable: true,
|
||
enumerable: true,
|
||
});
|
||
}
|
||
|
||
window.Event = Event;
|
||
window.EventTarget = EventTarget;
|
||
window.ErrorEvent = ErrorEvent;
|
||
window.CloseEvent = CloseEvent;
|
||
window.MessageEvent = MessageEvent;
|
||
window.CustomEvent = CustomEvent;
|
||
window.ProgressEvent = ProgressEvent;
|
||
window.dispatchEvent = EventTarget.prototype.dispatchEvent;
|
||
window.addEventListener = EventTarget.prototype.addEventListener;
|
||
window.removeEventListener = EventTarget.prototype.removeEventListener;
|
||
window.__bootstrap.eventTarget = {
|
||
EventTarget,
|
||
setEventTargetData,
|
||
};
|
||
window.__bootstrap.event = {
|
||
setIsTrusted,
|
||
setTarget,
|
||
defineEventHandler,
|
||
};
|
||
})(this);
|