3 lines
4.5 KiB
JavaScript
3 lines
4.5 KiB
JavaScript
const t={};class e{constructor(){this.subscriptions=[]}add(t){var e,s;return e=this.subscriptions,s=t,-1===e.indexOf(s)&&e.push(s),()=>function(t,e){const s=t.indexOf(e);s>-1&&t.splice(s,1)}(this.subscriptions,t)}notify(t,e,s){const i=this.subscriptions.length;if(i)if(1===i)this.subscriptions[0](t,e,s);else for(let n=0;n<i;n++){const i=this.subscriptions[n];i&&i(t,e,s)}}getSize(){return this.subscriptions.length}clear(){this.subscriptions.length=0}}const s=["setup","read","resolveKeyframes","preUpdate","update","preRender","render","postRender"];function i(e,i){let n=!1,r=!0;const a={delta:0,timestamp:0,isProcessing:!1},o=()=>n=!0,c=s.reduce((t,e)=>(t[e]=function(t){let e=new Set,s=new Set,i=!1,n=!1;const r=new WeakSet;let a={delta:0,timestamp:0,isProcessing:!1};function o(e){r.has(e)&&(c.schedule(e),t()),e(a)}const c={schedule:(t,n=!1,a=!1)=>{const o=a&&i?e:s;return n&&r.add(t),o.add(t),t},cancel:t=>{s.delete(t),r.delete(t)},process:t=>{if(a=t,i)return void(n=!0);i=!0;const r=e;e=s,s=r,e.forEach(o),e.clear(),i=!1,n&&(n=!1,c.process(t))}};return c}(o),t),{}),{setup:h,read:d,resolveKeyframes:p,preUpdate:u,update:l,preRender:v,render:m,postRender:f}=c,g=()=>{const s=t.useManualTiming,o=s?a.timestamp:performance.now();n=!1,s||(a.delta=r?1e3/60:Math.max(Math.min(o-a.timestamp,40),1)),a.timestamp=o,a.isProcessing=!0,h.process(a),d.process(a),p.process(a),u.process(a),l.process(a),v.process(a),m.process(a),f.process(a),a.isProcessing=!1,n&&i&&(r=!1,e(g))};return{schedule:s.reduce((t,s)=>{const i=c[s];return t[s]=(t,s=!1,o=!1)=>(n||(n=!0,r=!0,a.isProcessing||e(g)),i.schedule(t,s,o)),t},{}),cancel:t=>{for(let e=0;e<s.length;e++)c[s[e]].cancel(t)},state:a,steps:c}}const{schedule:n,state:r}=i("undefined"!=typeof requestAnimationFrame?requestAnimationFrame:t=>t,!0);let a;function o(){a=void 0}const c={now:()=>(void 0===a&&c.set(r.isProcessing||t.useManualTiming?r.timestamp:performance.now()),a),set:t=>{a=t,queueMicrotask(o)}},h={current:void 0};class d{constructor(t,e={}){this.canTrackVelocity=null,this.events={},this.updateAndNotify=t=>{const e=c.now();if(this.updatedAt!==e&&this.setPrevFrameValue(),this.prev=this.current,this.setCurrent(t),this.current!==this.prev&&(this.events.change?.notify(this.current),this.dependents))for(const t of this.dependents)t.dirty()},this.hasAnimated=!1,this.setCurrent(t),this.owner=e.owner}setCurrent(t){var e;this.current=t,this.updatedAt=c.now(),null===this.canTrackVelocity&&void 0!==t&&(this.canTrackVelocity=(e=this.current,!isNaN(parseFloat(e))))}setPrevFrameValue(t=this.current){this.prevFrameValue=t,this.prevUpdatedAt=this.updatedAt}onChange(t){return this.on("change",t)}on(t,s){this.events[t]||(this.events[t]=new e);const i=this.events[t].add(s);return"change"===t?()=>{i(),n.read(()=>{this.events.change.getSize()||this.stop()})}:i}clearListeners(){for(const t in this.events)this.events[t].clear()}attach(t,e){this.passiveEffect=t,this.stopPassiveEffect=e}set(t){this.passiveEffect?this.passiveEffect(t,this.updateAndNotify):this.updateAndNotify(t)}setWithVelocity(t,e,s){this.set(e),this.prev=void 0,this.prevFrameValue=t,this.prevUpdatedAt=this.updatedAt-s}jump(t,e=!0){this.updateAndNotify(t),this.prev=t,this.prevUpdatedAt=this.prevFrameValue=void 0,e&&this.stop(),this.stopPassiveEffect&&this.stopPassiveEffect()}dirty(){this.events.change?.notify(this.current)}addDependent(t){this.dependents||(this.dependents=new Set),this.dependents.add(t)}removeDependent(t){this.dependents&&this.dependents.delete(t)}get(){return h.current&&h.current.push(this),this.current}getPrevious(){return this.prev}getVelocity(){const t=c.now();if(!this.canTrackVelocity||void 0===this.prevFrameValue||t-this.updatedAt>30)return 0;const e=Math.min(this.updatedAt-this.prevUpdatedAt,30);return s=parseFloat(this.current)-parseFloat(this.prevFrameValue),(i=e)?s*(1e3/i):0;var s,i}start(t){return this.stop(),new Promise(e=>{this.hasAnimated=!0,this.animation=t(e),this.events.animationStart&&this.events.animationStart.notify()}).then(()=>{this.events.animationComplete&&this.events.animationComplete.notify(),this.clearAnimation()})}stop(){this.animation&&(this.animation.stop(),this.events.animationCancel&&this.events.animationCancel.notify()),this.clearAnimation()}isAnimating(){return!!this.animation}clearAnimation(){delete this.animation}destroy(){this.dependents?.clear(),this.events.destroy?.notify(),this.clearListeners(),this.stop(),this.stopPassiveEffect&&this.stopPassiveEffect()}}function p(t,e){return new d(t,e)}export{d as MotionValue,h as collectMotionValues,p as motionValue};
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