blob: a33e8edafd8142cd3c8570ae2f8ecf2e64fbfd7b (
plain)
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
|
import each from "lodash/each";
import pull from "lodash/pull";
/**
* Adds functions looking like the EventTarget ones on `this`.
*
* This is NOT compatible, as they are not using Event.
* They cannot preventDefault.
* They cannot stop propagation.
* There is no propagation.
*/
const eventable = (self) => {
each(
// Functions to mix in.
{
addEventListener(type, listener) {
if (!this[`_${type}_listeners`]) {
this[`_${type}_listeners`] = [];
}
const table = this[`_${type}_listeners`];
table.push(listener);
},
removeEventListener(type, listener) {
if (!this[`_${type}_listeners`]) {
this[`_${type}_listeners`] = {};
}
const table = this[`_${type}_listeners`];
pull(table, listener);
},
sendEvent(type, ...params) {
if (!this[`_${type}_listeners`]) {
this[`_${type}_listeners`] = [];
}
const table = this[`_${type}_listeners`];
table.forEach((fn) => fn(...params));
}
},
// Mixing in all those.
(fn, name) => {
self[name] = fn.bind(self);
}
);
};
export default eventable;
|
