From 4a2dbbf1d904653763f664704f728318987d1351 Mon Sep 17 00:00:00 2001
From: wang <1509326266@qq.com>
Date: Sat, 27 Jul 2024 22:46:14 +0800
Subject: [PATCH] feat(components): add theme switching animation

---
 src/components/common/theme-schema-switch.vue | 52 ++++++++++++++-----
 src/layouts/modules/global-header/index.vue   |  6 +--
 src/styles/css/global.css                     | 18 +++++++
 src/views/_builtin/login/index.vue            |  7 +--
 4 files changed, 58 insertions(+), 25 deletions(-)

diff --git a/src/components/common/theme-schema-switch.vue b/src/components/common/theme-schema-switch.vue
index 78050d4f..ffea5216 100644
--- a/src/components/common/theme-schema-switch.vue
+++ b/src/components/common/theme-schema-switch.vue
@@ -1,13 +1,12 @@
 <script setup lang="ts">
-import { computed } from 'vue';
+import { computed, nextTick } from 'vue';
 import type { PopoverPlacement } from 'naive-ui';
 import { $t } from '@/locales';
+import { useThemeStore } from '@/store/modules/theme';
 
 defineOptions({ name: 'ThemeSchemaSwitch' });
 
 interface Props {
-  /** Theme schema */
-  themeSchema: UnionKey.ThemeScheme;
   /** Show tooltip */
   showTooltip?: boolean;
   /** Tooltip placement */
@@ -19,15 +18,7 @@ const props = withDefaults(defineProps<Props>(), {
   tooltipPlacement: 'bottom'
 });
 
-interface Emits {
-  (e: 'switch'): void;
-}
-
-const emit = defineEmits<Emits>();
-
-function handleSwitch() {
-  emit('switch');
-}
+const themeStore = useThemeStore();
 
 const icons: Record<UnionKey.ThemeScheme, string> = {
   light: 'material-symbols:sunny',
@@ -35,13 +26,46 @@ const icons: Record<UnionKey.ThemeScheme, string> = {
   auto: 'material-symbols:hdr-auto'
 };
 
-const icon = computed(() => icons[props.themeSchema]);
+const icon = computed(() => icons[themeStore.themeScheme]);
 
 const tooltipContent = computed(() => {
   if (!props.showTooltip) return '';
 
   return $t('icon.themeSchema');
 });
+
+function toggleDark(event: MouseEvent) {
+  const isAppearanceTransition =
+    document.startViewTransition && !window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+
+  if (!isAppearanceTransition) {
+    themeStore.toggleThemeScheme();
+    return;
+  }
+
+  const x = event.clientX;
+  const y = event.clientY;
+  const endRadius = Math.hypot(Math.max(x, innerWidth - x), Math.max(y, innerHeight - y));
+  // @ts-expect-error: Transition API
+  const transition = document.startViewTransition(async () => {
+    themeStore.toggleThemeScheme();
+    await nextTick();
+  });
+
+  transition.ready.then(() => {
+    const clipPath = [`circle(0px at ${x}px ${y}px)`, `circle(${endRadius}px at ${x}px ${y}px)`];
+    document.documentElement.animate(
+      {
+        clipPath: themeStore.darkMode ? [...clipPath].reverse() : clipPath
+      },
+      {
+        duration: 400,
+        easing: 'ease-out',
+        pseudoElement: themeStore.darkMode ? '::view-transition-old(root)' : '::view-transition-new(root)'
+      }
+    );
+  });
+}
 </script>
 
 <template>
@@ -49,7 +73,7 @@ const tooltipContent = computed(() => {
     :icon="icon"
     :tooltip-content="tooltipContent"
     :tooltip-placement="tooltipPlacement"
-    @click="handleSwitch"
+    @click="toggleDark"
   />
 </template>
 
diff --git a/src/layouts/modules/global-header/index.vue b/src/layouts/modules/global-header/index.vue
index cd640ba4..80bd3fbc 100644
--- a/src/layouts/modules/global-header/index.vue
+++ b/src/layouts/modules/global-header/index.vue
@@ -41,11 +41,7 @@ const { isFullscreen, toggle } = useFullscreen();
       <GlobalSearch />
       <FullScreen v-if="!appStore.isMobile" :full="isFullscreen" @click="toggle" />
       <LangSwitch :lang="appStore.locale" :lang-options="appStore.localeOptions" @change-lang="appStore.changeLocale" />
-      <ThemeSchemaSwitch
-        :theme-schema="themeStore.themeScheme"
-        :is-dark="themeStore.darkMode"
-        @switch="themeStore.toggleThemeScheme"
-      />
+      <ThemeSchemaSwitch />
       <ThemeButton />
       <UserAvatar />
     </div>
diff --git a/src/styles/css/global.css b/src/styles/css/global.css
index 141d4de0..0925ad8e 100644
--- a/src/styles/css/global.css
+++ b/src/styles/css/global.css
@@ -15,3 +15,21 @@ html {
 html.grayscale {
   filter: grayscale(100%);
 }
+
+::view-transition-old(root),
+::view-transition-new(root) {
+  animation: none;
+  mix-blend-mode: normal;
+}
+::view-transition-old(root) {
+  z-index: 1;
+}
+::view-transition-new(root) {
+  z-index: 9999;
+}
+.dark::view-transition-old(root) {
+  z-index: 9999;
+}
+.dark::view-transition-new(root) {
+  z-index: 1;
+}
diff --git a/src/views/_builtin/login/index.vue b/src/views/_builtin/login/index.vue
index bf487d93..30409556 100644
--- a/src/views/_builtin/login/index.vue
+++ b/src/views/_builtin/login/index.vue
@@ -59,12 +59,7 @@ const bgColor = computed(() => {
           <SystemLogo class="text-64px text-primary lt-sm:text-48px" />
           <h3 class="text-28px text-primary font-500 lt-sm:text-22px">{{ $t('system.title') }}</h3>
           <div class="i-flex-col">
-            <ThemeSchemaSwitch
-              :theme-schema="themeStore.themeScheme"
-              :show-tooltip="false"
-              class="text-20px lt-sm:text-18px"
-              @switch="themeStore.toggleThemeScheme"
-            />
+            <ThemeSchemaSwitch :show-tooltip="false" class="text-20px lt-sm:text-18px" />
             <LangSwitch
               :lang="appStore.locale"
               :lang-options="appStore.localeOptions"