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36 lines
1.7 KiB
36 lines
1.7 KiB
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import { AnimationTriggerMetadata } from '@angular/animations';
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/** Time and timing curve for expansion panel animations. */
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export declare const EXPANSION_PANEL_ANIMATION_TIMING = "225ms cubic-bezier(0.4,0.0,0.2,1)";
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/**
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* Animations used by the Material expansion panel.
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*
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* A bug in angular animation's `state` when ViewContainers are moved using ViewContainerRef.move()
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* causes the animation state of moved components to become `void` upon exit, and not update again
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* upon reentry into the DOM. This can lead a to situation for the expansion panel where the state
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* of the panel is `expanded` or `collapsed` but the animation state is `void`.
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*
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* To correctly handle animating to the next state, we animate between `void` and `collapsed` which
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* are defined to have the same styles. Since angular animates from the current styles to the
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* destination state's style definition, in situations where we are moving from `void`'s styles to
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* `collapsed` this acts a noop since no style values change.
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*
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* In the case where angular's animation state is out of sync with the expansion panel's state, the
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* expansion panel being `expanded` and angular animations being `void`, the animation from the
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* `expanded`'s effective styles (though in a `void` animation state) to the collapsed state will
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* occur as expected.
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*
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* Angular Bug: https://github.com/angular/angular/issues/18847
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*
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* @docs-private
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*/
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export declare const matExpansionAnimations: {
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readonly indicatorRotate: AnimationTriggerMetadata;
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readonly bodyExpansion: AnimationTriggerMetadata;
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};
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