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* @module Actions
*
* @categoryDescription Animation
* {@link AnimatePlay} and {@link AnimatePause} resume or pause all animations
* on the given element. They work with CSS or Web Animations.
*
* {@link Actions.Animate | Animate} plays or reverses all animations on the
* given element. It works with CSS or Web Animations.
*/
import * as MC from "@lisn/globals/minification-constants";
import {
iterateAnimations,
resetCssAnimationsNow,
} from "@lisn/utils/animations";
import {
hasClass,
addClassesNow,
removeClassesNow,
} from "@lisn/utils/css-alter";
import { Action, registerAction } from "@lisn/actions/action";
/**
* Resumes or pauses all animations on the given element.
*
* It works with CSS or Web Animations.
*
* **IMPORTANT:** When constructed, it resets and pauses the animations as a
* form of initialization.
*
* -------
*
* To use with auto-widgets (HTML API) as part of a trigger specification:
* - Action name: "animate-play".
* - Arguments: none
* - Options: none
*
* @example
* ```html
* <button id="btn">Play/pause</button>
* <div data-lisn-on-click="@animate-play +target=#btn"></div>
* ```
*
* @category Animation
*/
export class AnimatePlay implements Action {
/**
* Resumes the animations without resetting them.
*/
readonly do: () => Promise<void>;
/**
* Pauses the animations without resetting them.
*/
readonly undo: () => Promise<void>;
/**
* Resumes the animations if paused, otherwise pauses them.
*/
readonly toggle: () => Promise<void>;
static register() {
registerAction("animate-play", (element) => new AnimatePlay(element));
}
constructor(element: Element) {
const { _play, _pause, _toggle } = getMethods(element);
// initial state is 0% and paused
animate(element, PAUSE, true);
this.do = _play;
this.undo = _pause;
this[MC.S_TOGGLE] = _toggle;
}
}
/**
* Pauses or resumes all animations on the given element.
*
* It works with CSS or Web Animations.
*
* **IMPORTANT:** When constructed, it plays the animations as a form of
* initialization.
*
* -------
*
* To use with auto-widgets (HTML API) as part of a trigger specification:
* - Action name: "animate-pause".
* - Arguments: none
* - Options: none
*
* @example
* ```html
* <button id="btn">Play/pause</button>
* <div data-lisn-on-click="@animate-pause +target=#btn"></div>
* ```
*
* @category Animation
*/
export class AnimatePause implements Action {
/**
* Pauses the animations without resetting them.
*/
readonly do: () => Promise<void>;
/**
* Resumes the animations without resetting them.
*/
readonly undo: () => Promise<void>;
/**
* Resumes the animations if paused, otherwise pauses them.
*/
readonly toggle: () => Promise<void>;
static register() {
registerAction("animate-pause", (element) => new AnimatePause(element));
}
constructor(element: Element) {
const { _play, _pause, _toggle } = getMethods(element);
// Initial state is playing
_play();
this.do = _pause;
this.undo = _play;
this[MC.S_TOGGLE] = _toggle;
}
}
// --------------------
type AnimateAction = typeof PLAY | typeof PAUSE | typeof TOGGLE;
const PLAY = 0;
const PAUSE = 1;
const TOGGLE = 2;
const getMethods = (element: Element) => {
return {
_play: () => animate(element, PLAY),
_pause: () => animate(element, PAUSE),
_toggle: () => animate(element, TOGGLE),
};
};
const animate = (
element: Element,
action: AnimateAction,
isInitial = false,
) => {
return iterateAnimations(
element,
/* istanbul ignore next */ // jsdom doesn't support Web Animations
(animation) => {
const isPaused = animation.playState === "paused";
if (action === PLAY || (isPaused && action === TOGGLE)) {
animation.play();
} else {
animation.pause();
}
},
(element) => {
if (isInitial) {
resetCssAnimationsNow(element);
}
const isPaused = hasClass(element, MC.PREFIX_ANIMATE_PAUSE);
if (action === PLAY || (isPaused && action === TOGGLE)) {
removeClassesNow(element, MC.PREFIX_ANIMATE_PAUSE);
} else {
addClassesNow(element, MC.PREFIX_ANIMATE_PAUSE);
}
},
isInitial,
);
};
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