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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
|
/**
* --------------------------------------------------------------------------
* Bootstrap (v5.1.3): dom/event-handler.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
import { getjQuery } from '../util/index'
/**
* Constants
*/
const namespaceRegex = /[^.]*(?=\..*)\.|.*/
const stripNameRegex = /\..*/
const stripUidRegex = /::\d+$/
const eventRegistry = {} // Events storage
let uidEvent = 1
const customEvents = {
mouseenter: 'mouseover',
mouseleave: 'mouseout'
}
const customEventsRegex = /^(mouseenter|mouseleave)/i
const nativeEvents = new Set([
'click',
'dblclick',
'mouseup',
'mousedown',
'contextmenu',
'mousewheel',
'DOMMouseScroll',
'mouseover',
'mouseout',
'mousemove',
'selectstart',
'selectend',
'keydown',
'keypress',
'keyup',
'orientationchange',
'touchstart',
'touchmove',
'touchend',
'touchcancel',
'pointerdown',
'pointermove',
'pointerup',
'pointerleave',
'pointercancel',
'gesturestart',
'gesturechange',
'gestureend',
'focus',
'blur',
'change',
'reset',
'select',
'submit',
'focusin',
'focusout',
'load',
'unload',
'beforeunload',
'resize',
'move',
'DOMContentLoaded',
'readystatechange',
'error',
'abort',
'scroll'
])
/**
* Private methods
*/
function getUidEvent(element, uid) {
return (uid && `${uid}::${uidEvent++}`) || element.uidEvent || uidEvent++
}
function getEvent(element) {
const uid = getUidEvent(element)
element.uidEvent = uid
eventRegistry[uid] = eventRegistry[uid] || {}
return eventRegistry[uid]
}
function bootstrapHandler(element, fn) {
return function handler(event) {
event.delegateTarget = element
if (handler.oneOff) {
EventHandler.off(element, event.type, fn)
}
return fn.apply(element, [event])
}
}
function bootstrapDelegationHandler(element, selector, fn) {
return function handler(event) {
const domElements = element.querySelectorAll(selector)
for (let { target } = event; target && target !== this; target = target.parentNode) {
for (const domElement of domElements) {
if (domElement !== target) {
continue
}
event.delegateTarget = target
if (handler.oneOff) {
EventHandler.off(element, event.type, selector, fn)
}
return fn.apply(target, [event])
}
}
// To please ESLint
return null
}
}
function findHandler(events, handler, delegationSelector = null) {
for (const uidEvent of Object.keys(events)) {
const event = events[uidEvent]
if (event.originalHandler === handler && event.delegationSelector === delegationSelector) {
return event
}
}
return null
}
function normalizeParameters(originalTypeEvent, handler, delegationFunction) {
const delegation = typeof handler === 'string'
const originalHandler = delegation ? delegationFunction : handler
let typeEvent = getTypeEvent(originalTypeEvent)
if (!nativeEvents.has(typeEvent)) {
typeEvent = originalTypeEvent
}
return [delegation, originalHandler, typeEvent]
}
function addHandler(element, originalTypeEvent, handler, delegationFunction, oneOff) {
if (typeof originalTypeEvent !== 'string' || !element) {
return
}
if (!handler) {
handler = delegationFunction
delegationFunction = null
}
// in case of mouseenter or mouseleave wrap the handler within a function that checks for its DOM position
// this prevents the handler from being dispatched the same way as mouseover or mouseout does
if (customEventsRegex.test(originalTypeEvent)) {
const wrapFunction = fn => {
return function (event) {
if (!event.relatedTarget || (event.relatedTarget !== event.delegateTarget && !event.delegateTarget.contains(event.relatedTarget))) {
return fn.call(this, event)
}
}
}
if (delegationFunction) {
delegationFunction = wrapFunction(delegationFunction)
} else {
handler = wrapFunction(handler)
}
}
const [delegation, originalHandler, typeEvent] = normalizeParameters(originalTypeEvent, handler, delegationFunction)
const events = getEvent(element)
const handlers = events[typeEvent] || (events[typeEvent] = {})
const previousFunction = findHandler(handlers, originalHandler, delegation ? handler : null)
if (previousFunction) {
previousFunction.oneOff = previousFunction.oneOff && oneOff
return
}
const uid = getUidEvent(originalHandler, originalTypeEvent.replace(namespaceRegex, ''))
const fn = delegation ?
bootstrapDelegationHandler(element, handler, delegationFunction) :
bootstrapHandler(element, handler)
fn.delegationSelector = delegation ? handler : null
fn.originalHandler = originalHandler
fn.oneOff = oneOff
fn.uidEvent = uid
handlers[uid] = fn
element.addEventListener(typeEvent, fn, delegation)
}
function removeHandler(element, events, typeEvent, handler, delegationSelector) {
const fn = findHandler(events[typeEvent], handler, delegationSelector)
if (!fn) {
return
}
element.removeEventListener(typeEvent, fn, Boolean(delegationSelector))
delete events[typeEvent][fn.uidEvent]
}
function removeNamespacedHandlers(element, events, typeEvent, namespace) {
const storeElementEvent = events[typeEvent] || {}
for (const handlerKey of Object.keys(storeElementEvent)) {
if (handlerKey.includes(namespace)) {
const event = storeElementEvent[handlerKey]
removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector)
}
}
}
function getTypeEvent(event) {
// allow to get the native events from namespaced events ('click.bs.button' --> 'click')
event = event.replace(stripNameRegex, '')
return customEvents[event] || event
}
const EventHandler = {
on(element, event, handler, delegationFunction) {
addHandler(element, event, handler, delegationFunction, false)
},
one(element, event, handler, delegationFunction) {
addHandler(element, event, handler, delegationFunction, true)
},
off(element, originalTypeEvent, handler, delegationFunction) {
if (typeof originalTypeEvent !== 'string' || !element) {
return
}
const [delegation, originalHandler, typeEvent] = normalizeParameters(originalTypeEvent, handler, delegationFunction)
const inNamespace = typeEvent !== originalTypeEvent
const events = getEvent(element)
const isNamespace = originalTypeEvent.startsWith('.')
if (typeof originalHandler !== 'undefined') {
// Simplest case: handler is passed, remove that listener ONLY.
if (!events || !events[typeEvent]) {
return
}
removeHandler(element, events, typeEvent, originalHandler, delegation ? handler : null)
return
}
if (isNamespace) {
for (const elementEvent of Object.keys(events)) {
removeNamespacedHandlers(element, events, elementEvent, originalTypeEvent.slice(1))
}
}
const storeElementEvent = events[typeEvent] || {}
for (const keyHandlers of Object.keys(storeElementEvent)) {
const handlerKey = keyHandlers.replace(stripUidRegex, '')
if (!inNamespace || originalTypeEvent.includes(handlerKey)) {
const event = storeElementEvent[keyHandlers]
removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector)
}
}
},
trigger(element, event, args) {
if (typeof event !== 'string' || !element) {
return null
}
const $ = getjQuery()
const typeEvent = getTypeEvent(event)
const inNamespace = event !== typeEvent
const isNative = nativeEvents.has(typeEvent)
let jQueryEvent
let bubbles = true
let nativeDispatch = true
let defaultPrevented = false
if (inNamespace && $) {
jQueryEvent = $.Event(event, args)
$(element).trigger(jQueryEvent)
bubbles = !jQueryEvent.isPropagationStopped()
nativeDispatch = !jQueryEvent.isImmediatePropagationStopped()
defaultPrevented = jQueryEvent.isDefaultPrevented()
}
const evt = isNative ?
new Event(event, { bubbles, cancelable: true }) :
new CustomEvent(event, { bubbles, cancelable: true })
// merge custom information in our event
if (typeof args !== 'undefined') {
for (const key of Object.keys(args)) {
Object.defineProperty(evt, key, {
get() {
return args[key]
}
})
}
}
if (defaultPrevented) {
evt.preventDefault()
}
if (nativeDispatch) {
element.dispatchEvent(evt)
}
if (evt.defaultPrevented && typeof jQueryEvent !== 'undefined') {
jQueryEvent.preventDefault()
}
return evt
}
}
export default EventHandler
|