kopia lustrzana https://github.com/shoelace-style/shoelace
210 wiersze
6.1 KiB
TypeScript
210 wiersze
6.1 KiB
TypeScript
import { LitElement, html, property, queryAsync, unsafeCSS } from 'lit-element';
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import { event, EventEmitter, tag, watch } from '../../internal/decorators';
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import styles from 'sass:./animation.scss';
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import { animations } from './animations';
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/**
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* @since 2.0
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* @status stable
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*
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* @slot - The element to animate. If multiple elements are to be animated, wrap them in a single container.
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*/
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@tag('sl-animation')
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export default class SlAnimation extends LitElement {
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static styles = unsafeCSS(styles);
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private animation: Animation;
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private hasStarted = false;
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@queryAsync('slot') defaultSlot: Promise<HTMLSlotElement>;
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/** The name of the built-in animation to use. For custom animations, use the `keyframes` prop. */
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@property() name = 'none';
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/** The number of milliseconds to delay the start of the animation. */
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@property({ type: Number }) delay = 0;
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/** Determines the direction of playback as well as the behavior when reaching the end of an iteration. */
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@property() direction: PlaybackDirection = 'normal';
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/** The number of milliseconds each iteration of the animation takes to complete. */
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@property({ type: Number }) duration = 1000;
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/**
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* The easing function to use for the animation. This can be a Shoelace easing function or a custom easing function
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* such as `cubic-bezier(0, 1, .76, 1.14)`.
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*/
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@property() easing = 'linear';
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/** The number of milliseconds to delay after the active period of an animation sequence. */
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@property({ attribute: 'end-delay', type: Number }) endDelay = 0;
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/** Sets how the animation applies styles to its target before and after its execution. */
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@property() fill: FillMode = 'auto';
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/** The number of iterations to run before the animation completes. Defaults to `Infinity`, which loops. */
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@property({ type: Number }) iterations: number = Infinity;
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/** The offset at which to start the animation, usually between 0 (start) and 1 (end). */
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@property({ attribute: 'iteration-start', type: Number }) iterationStart = 0;
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/** The keyframes to use for the animation. If this is set, `name` will be ignored. */
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@property() keyframes: Keyframe[];
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/**
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* Sets the animation's playback rate. The default is `1`, which plays the animation at a normal speed. Setting this
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* to `2`, for example, will double the animation's speed. A negative value can be used to reverse the animation. This
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* value can be changed without causing the animation to restart.
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*/
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@property({ attribute: 'playback-rate', type: Number }) playbackRate = 1;
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/** Pauses the animation. The animation will resume when this prop is removed. */
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@property({ type: Boolean }) pause = false;
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/** Emitted when the animation is canceled. */
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@event('sl-cancel') slCancel: EventEmitter<void>;
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/** Emitted when the animation finishes. */
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@event('sl-finish') slFinish: EventEmitter<void>;
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/** Emitted when the animation starts or restarts. */
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@event('sl-start') slStart: EventEmitter<void>;
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connectedCallback() {
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super.connectedCallback();
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this.createAnimation();
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}
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disconnectedCallback() {
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super.disconnectedCallback();
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this.destroyAnimation();
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}
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@watch('name')
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@watch('delay')
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@watch('direction')
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@watch('duration')
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@watch('easing')
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@watch('endDelay')
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@watch('fill')
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@watch('iterations')
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@watch('iterationsStart')
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@watch('keyframes')
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handleAnimationChange() {
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this.createAnimation();
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}
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handleAnimationFinish() {
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this.slFinish.emit();
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}
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handleAnimationCancel() {
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this.slCancel.emit();
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}
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@watch('pause')
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handlePauseChange() {
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if (this.animation) {
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this.pause ? this.animation.pause() : this.animation.play();
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if (!this.pause && !this.hasStarted) {
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this.hasStarted = true;
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this.slStart.emit();
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}
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return true;
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} else {
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return false;
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}
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}
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@watch('playbackRate')
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handlePlaybackRateChange() {
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if (this.animation) {
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this.animation.playbackRate = this.playbackRate;
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}
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}
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handleSlotChange() {
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this.destroyAnimation();
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this.createAnimation();
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}
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async createAnimation() {
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const easing = animations.easings[this.easing] || this.easing;
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const keyframes: Keyframe[] = this.keyframes ? this.keyframes : (animations as any)[this.name];
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const slot = await this.defaultSlot;
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const element = slot.assignedElements()[0] as HTMLElement;
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if (!element) {
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return false;
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}
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this.destroyAnimation();
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this.animation = element.animate(keyframes, {
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delay: this.delay,
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direction: this.direction,
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duration: this.duration,
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easing,
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endDelay: this.endDelay,
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fill: this.fill,
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iterationStart: this.iterationStart,
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iterations: this.iterations
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});
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this.animation.playbackRate = this.playbackRate;
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this.animation.addEventListener('cancel', this.handleAnimationCancel);
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this.animation.addEventListener('finish', this.handleAnimationFinish);
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if (this.pause) {
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this.animation.pause();
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} else {
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this.hasStarted = true;
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this.slStart.emit();
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}
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return true;
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}
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destroyAnimation() {
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if (this.animation) {
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this.animation.cancel();
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this.animation.removeEventListener('cancel', this.handleAnimationCancel);
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this.animation.removeEventListener('finish', this.handleAnimationFinish);
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this.hasStarted = false;
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}
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}
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/** Clears all KeyframeEffects caused by this animation and aborts its playback. */
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cancel() {
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try {
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this.animation.cancel();
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} catch {}
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}
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/** Sets the playback time to the end of the animation corresponding to the current playback direction. */
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finish() {
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try {
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this.animation.finish();
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} catch {}
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}
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/** Gets the current time of the animation in milliseconds. */
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getCurrentTime() {
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return this.animation.currentTime;
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}
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/** Sets the current time of the animation in milliseconds. */
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setCurrentTime(time: number) {
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this.animation.currentTime = time;
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}
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render() {
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return html` <slot @slotchange=${this.handleSlotChange}></slot> `;
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}
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}
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declare global {
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interface HTMLElementTagNameMap {
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'sl-animation': SlAnimation;
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}
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} |