-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
sliding-foundation.ts
66 lines (58 loc) · 2.89 KB
/
sliding-foundation.ts
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
/**
* @license
* Copyright 2018 Google Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
import {MDCTabIndicatorFoundation} from './foundation';
/* istanbul ignore next: subclass is not a branch statement */
export class MDCSlidingTabIndicatorFoundation extends
MDCTabIndicatorFoundation {
activate(previousIndicatorClientRect?: DOMRect) {
// Early exit if no indicator is present to handle cases where an indicator
// may be activated without a prior indicator state
if (!previousIndicatorClientRect) {
this.adapter.addClass(MDCTabIndicatorFoundation.cssClasses.ACTIVE);
return;
}
// This animation uses the FLIP approach. You can read more about it at the
// link below: https://aerotwist.com/blog/flip-your-animations/
// Calculate the dimensions based on the dimensions of the previous
// indicator
const currentClientRect = this.computeContentClientRect();
const widthDelta =
previousIndicatorClientRect.width / currentClientRect.width;
const xPosition = previousIndicatorClientRect.left - currentClientRect.left;
this.adapter.addClass(MDCTabIndicatorFoundation.cssClasses.NO_TRANSITION);
this.adapter.setContentStyleProperty(
'transform', `translateX(${xPosition}px) scaleX(${widthDelta})`);
// Force repaint before updating classes and transform to ensure the
// transform properly takes effect
this.computeContentClientRect();
this.adapter.removeClass(
MDCTabIndicatorFoundation.cssClasses.NO_TRANSITION);
this.adapter.addClass(MDCTabIndicatorFoundation.cssClasses.ACTIVE);
this.adapter.setContentStyleProperty('transform', '');
}
deactivate() {
this.adapter.removeClass(MDCTabIndicatorFoundation.cssClasses.ACTIVE);
}
}
// tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.
export default MDCSlidingTabIndicatorFoundation;