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
|
/*
* Copyright (C) 2020 Yomichan Authors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
class Modal extends EventDispatcher {
constructor(node) {
super();
this._node = node;
this._mutationObserver = null;
this._visible = false;
this._visibleClassName = 'modal-container-open';
this._openingClassName = 'modal-container-opening';
this._closingClassName = 'modal-container-closing';
this._closingAnimationDuration = 375; // Milliseconds; includes buffer
this._closeTimer = null;
}
get node() {
return this._node;
}
isVisible() {
return this._node.classList.contains(this._visibleClassName);
}
setVisible(value, animate=true) {
value = !!value;
const {classList} = this._node;
if (classList.contains(this._visibleClassName) === value) { return; }
if (this._closeTimer !== null) {
clearTimeout(this._closeTimer);
this._closeTimer = null;
}
if (value) {
if (animate) { classList.add(this._openingClassName); }
classList.remove(this._closingClassName);
getComputedStyle(this._node).getPropertyValue('display'); // Force update of CSS display property, allowing animation
classList.add(this._visibleClassName);
if (animate) { classList.remove(this._openingClassName); }
this._node.focus();
} else {
if (animate) { classList.add(this._closingClassName); }
classList.remove(this._visibleClassName);
if (animate) {
this._closeTimer = setTimeout(() => {
this._closeTimer = null;
classList.remove(this._closingClassName);
}, this._closingAnimationDuration);
}
}
}
on(eventName, callback) {
if (eventName === 'visibilityChanged') {
if (this._mutationObserver === null) {
this._visible = this._node.classList.contains(this._visibleClassName);
this._mutationObserver = new MutationObserver(this._onMutation.bind(this));
this._mutationObserver.observe(this._node, {
attributes: true,
attributeFilter: ['class'],
attributeOldValue: true
});
}
}
return super.on(eventName, callback);
}
off(eventName, callback) {
const result = super.off(eventName, callback);
if (eventName === 'visibilityChanged' && !this.hasListeners(eventName)) {
if (this._mutationObserver !== null) {
this._mutationObserver.disconnect();
this._mutationObserver = null;
}
}
return result;
}
// Private
_onModalHide() {
this.trigger('visibilityChanged', {visible: false});
}
_onModalShow() {
this.trigger('visibilityChanged', {visible: true});
}
_onMutation() {
const visible = this._node.classList.contains(this._visibleClassName);
if (this._visible === visible) { return; }
this._visible = visible;
this.trigger('visibilityChanged', {visible});
}
}
|