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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | 2x 2x 2x 2x 47472x 47472x 45192x 45192x 2x 108x 108x | /**
* Copyright 2019 Adobe. All rights reserved.
* This file is licensed to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
import commons from './Commons';
import Vent from '@adobe/vent';
/**
Events helper.
*/
class Events {
/**
@param {HTMLElement|String} elementOrSelector
The element or selector indicating the element to use as the delegation root.
*/
constructor(elementOrSelector) {
this._vent = new Vent(elementOrSelector);
}
/**
Add an event listener.
@param {String} eventName
The event name to listen for, including optional namespace(s).
@param {String} [selector]
The selector to use for event delegation.
@param {Function} handler
The function that will be called when the event is fired.
@param {Boolean} [useCapture]
Whether or not to listen during the capturing or bubbling phase.
@returns {Events} this, chainable.
*/
on(eventName, selector, handler, useCapture) {
this._vent.on(eventName, selector, handler, useCapture);
return this;
}
/**
Remove an event listener.
@param {String} [eventName]
The event name to stop listening for, including optional namespace(s).
@param {String} [selector]
The selector that was used for event delegation.
@param {Function} [handler]
The function that was passed to <code>on()</code>.
@param {Boolean} [useCapture]
Only remove listeners with <code>useCapture</code> set to the value passed in.
@returns {Event} this, chainable.
*/
off(eventName, selector, handler, useCapture) {
this._vent.off(eventName, selector, handler, useCapture);
return this;
}
/**
Dispatch a custom event at the root element.
@param {String} eventName
The name of the event to dispatch.
@param {Object} [options]
CustomEvent options.
@param {Object} [options.bubbles=true]
Whether the event should bubble.
@param {Object} [options.cancelable=true]
Whether the event should be cancelable.
@param {Object} [options.detail]
Data to pass to handlers as <code>event.detail</code>
@returns {CustomEvent} dispatched event.
*/
dispatch(eventName, options) {
return this._vent.dispatch(eventName, options);
}
/**
Destroy this instance, removing all events and references.
*/
destroy() {
this._vent.destroy();
}
/**
* @ignore
* @param {MouseEvent | TouchEvent} event
* @returns {boolean}
* Keyboards, Assistive Technologies, and element.click() all produce a "virtual"
* click event. This is a method of inferring such clicks. Every browser except
* IE 11 only sets a zero value of "detail" for click events that are "virtual".
* However, IE 11 uses a zero value for all click events. For IE 11 we rely on
* the quirk that it produces click events that are of type PointerEvent, and
* where only the "virtual" click lacks a pointerType field.
*
* Original licensing for the following method can be found in the
* NOTICE file in the root directory of this source tree.
* See https://github.com/facebook/react/blob/3c713d513195a53788b3f8bb4b70279d68b15bcc/packages/react-interactions/events/src/dom/shared/index.js#L74-L87
*/
isVirtualEvent(event) {
// JAWS/NVDA with Firefox.
if (event.mozInputSource === 0 && event.isTrusted) {
return true;
}
// Android TalkBack's detail value varies depending on the event listener providing the event so we have specific logic here instead
// If pointerType is defined, event is from a click listener. For events from mousedown listener, detail === 0 is a sufficient check
// to detect TalkBack virtual clicks.
if (commons.isAndroid() && event.pointerType) {
return event.type === 'click' && event.buttons === 1;
}
return event.detail === 0 && !event.pointerType;
}
}
I
/**
An enhanced event helper.
@type {Events}
*/
const events = new Events(window);
I
export default events;
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