From 730eeca5b27fc8650db9a7056166638a0093775c Mon Sep 17 00:00:00 2001
From: wheat <jacobrclevenger@gmail.com>
Date: Sat, 26 Nov 2022 14:57:59 -0500
Subject: [PATCH] feat: add virtual scroller support to paginator for timeline
 (#146)

---
 components/common/CommonPaginator.vue     | 22 ++++++++++++++------
 components/timeline/TimelinePaginator.vue | 15 ++++++++------
 package.json                              |  3 +++
 pnpm-lock.yaml                            | 25 ++++++++++++++++++++++-
 4 files changed, 52 insertions(+), 13 deletions(-)

diff --git a/components/common/CommonPaginator.vue b/components/common/CommonPaginator.vue
index 4b199d34..c6fcf594 100644
--- a/components/common/CommonPaginator.vue
+++ b/components/common/CommonPaginator.vue
@@ -1,9 +1,12 @@
 <script setup lang="ts">
+import { DynamicScroller } from 'vue-virtual-scroller'
+import 'vue-virtual-scroller/dist/vue-virtual-scroller.css'
 import type { Paginator } from 'masto'
 
-const { paginator, keyProp = 'id' } = defineProps<{
+const { paginator, keyProp = 'id', virtualScroller = false } = defineProps<{
   paginator: Paginator<any, any[]>
   keyProp?: string
+  virtualScroller: boolean
 }>()
 
 const { items, state, endAnchor, error } = usePaginator(paginator)
@@ -11,11 +14,18 @@ const { items, state, endAnchor, error } = usePaginator(paginator)
 
 <template>
   <div>
-    <slot
-      v-for="item of items"
-      :key="item[keyProp]"
-      :item="item"
-    />
+    <template v-if="virtualScroller">
+      <DynamicScroller v-slot="{ item, active }" :items="items" :min-item-size="200" page-mode>
+        <slot :item="item" :active="active" />
+      </DynamicScroller>
+    </template>
+    <template v-else>
+      <slot
+        v-for="item of items"
+        :key="item[keyProp]"
+        :item="item"
+      />
+    </template>
     <div ref="endAnchor" />
     <div v-if="state === 'loading'" p5 text-center flex="~ col" items-center animate-pulse>
       <div op50 i-ri:loader-2-fill animate-spin text-2xl />
diff --git a/components/timeline/TimelinePaginator.vue b/components/timeline/TimelinePaginator.vue
index 5d23a542..520b8c25 100644
--- a/components/timeline/TimelinePaginator.vue
+++ b/components/timeline/TimelinePaginator.vue
@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { DynamicScrollerItem } from 'vue-virtual-scroller'
 import type { Paginator, Status } from 'masto'
 
 const { paginator } = defineProps<{
@@ -7,12 +8,14 @@ const { paginator } = defineProps<{
 </script>
 
 <template>
-  <CommonPaginator :paginator="paginator">
-    <template #default="{ item }">
-      <StatusCard
-        :status="item"
-        border="b base" py-3
-      />
+  <CommonPaginator :paginator="paginator" virtual-scroller>
+    <template #default="{ item, active }">
+      <DynamicScrollerItem :item="item" :active="active" :size-dependencies="[item.text]">
+        <StatusCard
+          :status="item"
+          border="b base" py-3
+        />
+      </DynamicScrollerItem>
     </template>
   </CommonPaginator>
 </template>
diff --git a/package.json b/package.json
index 9039c41f..93689995 100644
--- a/package.json
+++ b/package.json
@@ -65,5 +65,8 @@
     "ufo": "^1.0.0",
     "unplugin-auto-import": "^0.11.5",
     "vitest": "^0.25.3"
+  },
+  "dependencies": {
+    "vue-virtual-scroller": "2.0.0-beta.3"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index fc602de4..0d2c8fc1 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -50,6 +50,10 @@ specifiers:
   ufo: ^1.0.0
   unplugin-auto-import: ^0.11.5
   vitest: ^0.25.3
+  vue-virtual-scroller: 2.0.0-beta.3
+
+dependencies:
+  vue-virtual-scroller: 2.0.0-beta.3
 
 devDependencies:
   '@antfu/eslint-config': 0.31.0_hsf322ms6xhhd4b5ne6lb74y4a
@@ -5282,6 +5286,10 @@ packages:
       yallist: 4.0.0
     dev: true
 
+  /mitt/2.1.0:
+    resolution: {integrity: sha512-ILj2TpLiysu2wkBbWjAmww7TkZb65aiQO+DkVdUTBpBXq+MHYiETENkKFMtsJZX1Lf4pe4QOrTSjIfUwN5lRdg==}
+    dev: false
+
   /mkdir/0.0.2:
     resolution: {integrity: sha512-98OnjcWaNEIRUJJe9rFoWlbkQ5n9z8F86wIPCrI961YEViiVybTuJln919WuuSHSnlrqXy0ELKCntoPy8C7lqg==}
     engines: {node: '>=0.4.0'}
@@ -7814,11 +7822,16 @@ packages:
       - supports-color
     dev: true
 
+  /vue-observe-visibility/2.0.0-alpha.1:
+    resolution: {integrity: sha512-flFbp/gs9pZniXR6fans8smv1kDScJ8RS7rEpMjhVabiKeq7Qz3D9+eGsypncjfIyyU84saU88XZ0zjbD6Gq/g==}
+    peerDependencies:
+      vue: ^3.0.0
+    dev: false
+
   /vue-resize/2.0.0-alpha.1:
     resolution: {integrity: sha512-7+iqOueLU7uc9NrMfrzbG8hwMqchfVfSzpVlCMeJQe4pyibqyoifDNbKTZvwxZKDvGkB+PdFeKvnGZMoEb8esg==}
     peerDependencies:
       vue: ^3.0.0
-    dev: true
 
   /vue-router/4.1.6_vue@3.2.45:
     resolution: {integrity: sha512-DYWYwsG6xNPmLq/FmZn8Ip+qrhFEzA14EI12MsMgVxvHFDYvlr4NXpVF5hrRH1wVcDP8fGi5F4rxuJSl8/r+EQ==}
@@ -7829,6 +7842,16 @@ packages:
       vue: 3.2.45
     dev: true
 
+  /vue-virtual-scroller/2.0.0-beta.3:
+    resolution: {integrity: sha512-k0hTAkZRmm3TXpfhW5Ig1fd8VV7+CmgnkebbQ4Uw6wnuQF52YJoaMQTFD3IV/Qi2WNadDB4ETrLUbVdnWboSjg==}
+    peerDependencies:
+      vue: ^3.2.0
+    dependencies:
+      mitt: 2.1.0
+      vue-observe-visibility: 2.0.0-alpha.1
+      vue-resize: 2.0.0-alpha.1
+    dev: false
+
   /vue/3.2.45:
     resolution: {integrity: sha512-9Nx/Mg2b2xWlXykmCwiTUCWHbWIj53bnkizBxKai1g61f2Xit700A1ljowpTIM11e3uipOeiPcSqnmBg6gyiaA==}
     dependencies: