feat(core): onboarding paper unfolding animation (#5264)

packages/frontend/core/src/components/affine/onboarding/onboarding.tsx

@@ -1,43 +1,76 @@
-import type { CSSProperties } from 'react';
+import { type CSSProperties, useCallback, useState } from 'react';
 
 import { articles } from './articles';
 import { PaperSteps } from './paper-steps';
 import * as styles from './style.css';
+import type { ArticleId, ArticleOption } from './types';
 
 interface OnboardingProps {
   onOpenApp?: () => void;
 }
 
 export const Onboarding = (_: OnboardingProps) => {
+  const [status, setStatus] = useState<{
+    activeId: ArticleId | null;
+    unfoldingId: ArticleId | null;
+  }>({ activeId: null, unfoldingId: null });
+
+  const onFoldChange = useCallback((id: ArticleId, v: boolean) => {
+    setStatus(s => {
+      return {
+        activeId: v ? null : s.activeId,
+        unfoldingId: v ? null : id,
+      };
+    });
+  }, []);
+
+  const onFoldChanged = useCallback((id: ArticleId, v: boolean) => {
+    setStatus(s => {
+      return {
+        activeId: v ? null : id,
+        unfoldingId: s.unfoldingId,
+      };
+    });
+  }, []);
+
   return (
     <div className={styles.onboarding} data-is-desktop={environment.isDesktop}>
       <div className={styles.offsetOrigin}>
-        {Object.entries(articles).map(([id, article]) => {
-          const { enterOptions, location } = article;
-          const style = {
-            '--fromX': `${enterOptions.fromX}vw`,
-            '--fromY': `${enterOptions.fromY}vh`,
-            '--fromZ': `${enterOptions.fromZ}px`,
-            '--toZ': `${enterOptions.toZ}px`,
-            '--fromRotateX': `${enterOptions.fromRotateX}deg`,
-            '--fromRotateY': `${enterOptions.fromRotateY}deg`,
-            '--fromRotateZ': `${enterOptions.fromRotateZ}deg`,
-            '--toRotateZ': `${enterOptions.toRotateZ}deg`,
+        {(Object.entries(articles) as Array<[ArticleId, ArticleOption]>).map(
+          ([id, article]) => {
+            const { enterOptions, location } = article;
+            const style = {
+              zIndex: status.unfoldingId === id ? 1 : 0,
 
-            '--delay': `${enterOptions.delay}ms`,
-            '--duration': enterOptions.duration,
-            '--easing': enterOptions.easing,
+              '--fromX': `${enterOptions.fromX}vw`,
+              '--fromY': `${enterOptions.fromY}vh`,
+              '--fromZ': `${enterOptions.fromZ}px`,
+              '--toZ': `${enterOptions.toZ}px`,
+              '--fromRotateX': `${enterOptions.fromRotateX}deg`,
+              '--fromRotateY': `${enterOptions.fromRotateY}deg`,
+              '--fromRotateZ': `${enterOptions.fromRotateZ}deg`,
+              '--toRotateZ': `${enterOptions.toRotateZ}deg`,
 
-            '--offset-x': `${location.x || 0}px`,
-            '--offset-y': `${location.y || 0}px`,
-          } as CSSProperties;
+              '--delay': `${enterOptions.delay}ms`,
+              '--duration': enterOptions.duration,
+              '--easing': enterOptions.easing,
 
-          return (
-            <div style={style} key={id}>
-              <PaperSteps article={article} show={true} />
-            </div>
-          );
-        })}
+              '--offset-x': `${location.x || 0}px`,
+              '--offset-y': `${location.y || 0}px`,
+            } as CSSProperties;
+
+            return (
+              <div style={style} key={id}>
+                <PaperSteps
+                  article={article}
+                  show={status.activeId === null || status.activeId === id}
+                  onFoldChange={onFoldChange}
+                  onFoldChanged={onFoldChanged}
+                />
+              </div>
+            );
+          }
+        )}
       </div>
     </div>
   );

packages/frontend/core/src/components/affine/onboarding/paper-steps.tsx

@@ -1,18 +1,51 @@
-import { useCallback } from 'react';
+import { useCallback, useState } from 'react';
 
 import { AnimateIn } from './steps/animate-in';
-import type { ArticleOption } from './types';
+import { Unfolding } from './steps/unfolding';
+import type { ArticleId, OnboardingStep } from './types';
+import { type ArticleOption } from './types';
 
 interface PaperStepsProps {
   show?: boolean;
   article: ArticleOption;
+  onFoldChange?: (id: ArticleId, v: boolean) => void;
+  onFoldChanged?: (id: ArticleId, v: boolean) => void;
 }
 
-export const PaperSteps = ({ show, article }: PaperStepsProps) => {
-  const onFinished = useCallback(() => {
-    console.log('onFinished');
+export const PaperSteps = ({
+  show,
+  article,
+  onFoldChange,
+  onFoldChanged,
+}: PaperStepsProps) => {
+  const [stage, setStage] = useState<OnboardingStep>('enter');
+
+  const onEntered = useCallback(() => {
+    setStage('unfold');
   }, []);
 
+  const _onFoldChange = useCallback(
+    (v: boolean) => {
+      onFoldChange?.(article.id, v);
+    },
+    [onFoldChange, article.id]
+  );
+
+  const _onFoldChanged = useCallback(
+    (v: boolean) => {
+      onFoldChanged?.(article.id, v);
+    },
+    [onFoldChanged, article.id]
+  );
+
   if (!show) return null;
-  return <AnimateIn article={article} onFinished={onFinished} />;
+  return stage === 'enter' ? (
+    <AnimateIn article={article} onFinished={onEntered} />
+  ) : stage === 'unfold' ? (
+    <Unfolding
+      article={article}
+      onChange={_onFoldChange}
+      onChanged={_onFoldChanged}
+    />
+  ) : null;
 };

packages/frontend/core/src/components/affine/onboarding/steps/unfolding.css.ts

@@ -0,0 +1,79 @@
+import { keyframes, style } from '@vanilla-extract/css';
+
+import { onboardingVars, paperLocation } from '../style.css';
+
+const unfolding = onboardingVars.unfolding;
+
+const shadowIn = keyframes({
+  from: { boxShadow: `0px 0px 0px rgba(0, 0, 0, 0)` },
+  to: { boxShadow: `0px 0px 4px rgba(66, 65, 73, 0.14)` },
+});
+const borderIn = keyframes({
+  from: { opacity: 0 },
+  to: { opacity: 1 },
+});
+const fadeOut = keyframes({
+  from: { opacity: 1 },
+  to: { opacity: 0 },
+});
+
+export const unfoldingWrapper = style([
+  paperLocation,
+  {
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+
+    transform: 'rotate(var(--toRotateZ))',
+    cursor: 'pointer',
+
+    backgroundColor: onboardingVars.paper.bg,
+    borderRadius: onboardingVars.paper.r,
+    width: onboardingVars.paper.w,
+    height: onboardingVars.paper.h,
+
+    // animate in
+    boxShadow: `0px 0px 0px rgba(0, 0, 0, 0)`,
+    animation: `${shadowIn} 0.5s ease forwards`,
+
+    transition: `all 0.23s ease, width ${unfolding.sizeTransition}, height ${unfolding.sizeTransition}, transform ${unfolding.transformTransition}`,
+
+    '::before': {
+      // hack border
+      content: '""',
+      position: 'absolute',
+      inset: 0,
+      border: `1px solid ${onboardingVars.paper.borderColor}`,
+      borderRadius: 'inherit',
+      animation: `${borderIn} 0.5s ease forwards`,
+      pointerEvents: 'none',
+    },
+
+    selectors: {
+      '&[data-fold="false"]': {
+        vars: {
+          '--toRotateZ': '0deg',
+        },
+        width: onboardingVars.article.w,
+        height: onboardingVars.article.h,
+        left: `calc(0 - ${onboardingVars.article.w} / 2)`,
+        top: `calc(0 - ${onboardingVars.article.h} / 2)`,
+      },
+    },
+  },
+]);
+
+export const unfoldingContent = style({
+  width: onboardingVars.paper.w,
+  height: onboardingVars.paper.h,
+
+  padding: '16px',
+  overflow: 'hidden',
+  fontFamily: 'var(--affine-font-family)',
+
+  selectors: {
+    '&.leave': {
+      animation: `${fadeOut} 0.1s ease forwards`,
+    },
+  },
+});

packages/frontend/core/src/components/affine/onboarding/steps/unfolding.tsx

@@ -0,0 +1,49 @@
+import clsx from 'clsx';
+import { useCallback, useRef, useState } from 'react';
+
+import type { ArticleOption } from '../types';
+import * as styles from './unfolding.css';
+
+interface UnfoldingProps {
+  onChange?: (e: boolean) => void;
+  onChanged?: (e: boolean) => void;
+  article: ArticleOption;
+}
+
+export const Unfolding = ({ article, onChange, onChanged }: UnfoldingProps) => {
+  const [fold, setFold] = useState(true);
+  const ref = useRef<HTMLDivElement>(null);
+
+  const toggleFold = useCallback(() => {
+    setFold(!fold);
+    return !fold;
+  }, [fold]);
+
+  const onPaperClick = useCallback(() => {
+    const isFold = toggleFold();
+    onChange?.(isFold);
+
+    if (ref.current) {
+      const handler = () => {
+        onChanged?.(isFold);
+      };
+      ref.current.addEventListener('transitionend', handler, { once: true });
+      return () => ref.current?.removeEventListener('transitionend', handler);
+    }
+
+    return null;
+  }, [toggleFold, onChange, onChanged]);
+
+  return (
+    <div
+      ref={ref}
+      data-fold={fold}
+      className={styles.unfoldingWrapper}
+      onClick={onPaperClick}
+    >
+      <div className={clsx(styles.unfoldingContent, !fold && 'leave')}>
+        {article.brief}
+      </div>
+    </div>
+  );
+};

packages/frontend/core/src/components/affine/onboarding/style.css.ts

@@ -16,10 +16,24 @@ export const onboardingVars = {
     bg: 'var(--affine-pure-white)',
     // textColor: 'var(--affine-light-text-primary-color)',
     textColor: '#121212',
+    borderColor: '#E3E2E4',
+  },
+  unfolding: {
+    sizeTransition: '0.3s ease',
+    transformTransition: '0.3s ease',
   },
   web: {
     bg: '#fafafa', // TODO: use var
   },
+
+  article: {
+    w: '1200px',
+    h: '800px',
+  },
+  edgeless: {
+    w: '1200px',
+    h: '800px',
+  },
 };
 
 export const perspective = style({