Merge branch 'fix/popover-performance' into feat/virtual-with-popover

CHANGELOG.md

@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Registration fixed
 - Deactivation of remote accounts from frontend
 - Fixed NSFW unhiding not working with videos when using one-click unhiding/displaying
+- Improved performance of anything that uses popovers (most notably statuses)
 
 ## [1.1.7 and earlier] - 2019-12-14
 ### Added

package.json

@@ -29,7 +29,6 @@
     "portal-vue": "^2.1.4",
     "sanitize-html": "^1.13.0",
     "v-click-outside": "^2.1.1",
-    "v-tooltip": "^2.0.2",
     "vue": "^2.5.13",
     "vue-chat-scroll": "^1.2.1",
     "vue-i18n": "^7.3.2",

src/components/account_actions/account_actions.js

@@ -1,4 +1,5 @@
 import ProgressButton from '../progress_button/progress_button.vue'
+import Popover from '../popover/popover.vue'
 
 const AccountActions = {
   props: [
@@ -8,7 +9,8 @@ const AccountActions = {
     return { }
   },
   components: {
-    ProgressButton
+    ProgressButton,
+    Popover
   },
   methods: {
     showRepeats () {

src/components/account_actions/account_actions.vue

@@ -1,13 +1,13 @@
 <template>
   <div class="account-actions">
-    <v-popover
+    <Popover
       trigger="click"
-      class="account-tools-popover"
-      :container="false"
-      placement="bottom-end"
-      :offset="5"
+      placement="bottom"
     >
-      <div slot="popover">
+      <div
+        slot="content"
+        class="account-tools-popover"
+      >
         <div class="dropdown-menu">
           <template v-if="user.following">
             <button
@@ -51,10 +51,13 @@
           </button>
         </div>
       </div>
-      <div class="btn btn-default ellipsis-button">
+      <div
+        slot="trigger"
+        class="btn btn-default ellipsis-button"
+      >
         <i class="icon-ellipsis trigger-button" />
       </div>
-    </v-popover>
+    </Popover>
   </div>
 </template>
 
@@ -62,11 +65,13 @@
 
 <style lang="scss">
 @import '../../_variables.scss';
-@import '../popper/popper.scss';
 .account-actions {
   margin: 0 .8em;
 }
 
+.account-tools-popover {
+}
+
 .account-actions button.dropdown-item {
   margin-left: 0;
 }

src/components/conversation/conversation.js

@@ -35,7 +35,9 @@ const conversation = {
   data () {
     return {
       highlight: null,
-      expanded: false
+      expanded: false,
+      // Approximate minimum height of a status, gets overwritten with real one
+      virtualHeight: '120px'
     }
   },
   props: [
@@ -44,7 +46,8 @@ const conversation = {
     'isPage',
     'pinnedStatusIdsObject',
     'inProfile',
-    'profileUserId'
+    'profileUserId',
+    'virtualHidden'
   ],
   created () {
     if (this.isPage) {
@@ -102,6 +105,9 @@ const conversation = {
     },
     isExpanded () {
       return this.expanded || this.isPage
+    },
+    hiddenStyle () {
+      return this.virtualHidden ? { height: this.virtualHeight } : {}
     }
   },
   components: {
@@ -121,6 +127,9 @@ const conversation = {
       if (value) {
         this.fetchConversation()
       }
+    },
+    virtualHidden (value) {
+      this.virtualHeight = `${this.$el.clientHeight}px`
     }
   },
   methods: {

src/components/conversation/conversation.vue

@@ -1,10 +1,11 @@
 <template>
   <div
+    :style="hiddenStyle"
     class="timeline panel-default"
     :class="[isExpanded ? 'panel' : 'panel-disabled']"
   >
     <div
-      v-if="isExpanded"
+      v-if="isExpanded && !virtualHidden"
       class="panel-heading conversation-heading"
     >
       <span class="title"> {{ $t('timeline.conversation') }} </span>
@@ -28,6 +29,7 @@
       :replies="getReplies(status.id)"
       :in-profile="inProfile"
       :profile-user-id="profileUserId"
+      :virtual-hidden="virtualHidden"
       class="status-fadein panel-body"
       @goto="setHighlight"
       @toggleExpanded="toggleExpanded"

src/components/emoji_reactions/emoji_reactions.js

@@ -1,20 +1,17 @@
 import UserAvatar from '../user_avatar/user_avatar.vue'
+import Popover from '../popover/popover.vue'
 
 const EMOJI_REACTION_COUNT_CUTOFF = 12
 
 const EmojiReactions = {
   name: 'EmojiReactions',
   components: {
-    UserAvatar
+    UserAvatar,
+    Popover
   },
   props: ['status'],
   data: () => ({
-    showAll: false,
-    popperOptions: {
-      modifiers: {
-        preventOverflow: { padding: { top: 50 }, boundariesElement: 'viewport' }
-      }
-    }
+    showAll: false
   }),
   computed: {
     tooManyReactions () {

src/components/emoji_reactions/emoji_reactions.vue

@@ -1,15 +1,14 @@
 <template>
   <div class="emoji-reactions">
-    <v-popover
+    <Popover
       v-for="(reaction) in emojiReactions"
       :key="reaction.name"
-      :popper-options="popperOptions"
       trigger="hover"
       placement="top"
+      :offset="{ y: 5 }"
     >
-
       <div
-        slot="popover"
+        slot="content"
         class="reacted-users"
       >
         <div v-if="accountsForEmoji[reaction.name].length">
@@ -34,6 +33,7 @@
         </div>
       </div>
       <button
+        slot="trigger"
         class="emoji-reaction btn btn-default"
         :class="{ 'picked-reaction': reactedWith(reaction.name), 'not-clickable': !loggedIn }"
         @click="emojiOnClick(reaction.name, $event)"
@@ -42,7 +42,7 @@
         <span class="reaction-emoji">{{ reaction.name }}</span>
         <span>{{ reaction.count }}</span>
       </button>
-    </v-popover>
+    </Popover>
     <a
         v-if="tooManyReactions"
         @click="toggleShowAll"
@@ -78,6 +78,7 @@
     display: flex;
     flex-direction: column;
     margin-left: 0.5em;
+    min-width: 5em;
 
     img {
       width: 1em;

src/components/extra_buttons/extra_buttons.js

@@ -1,5 +1,8 @@
+import Popover from '../popover/popover.vue'
+
 const ExtraButtons = {
   props: [ 'status' ],
+  components: { Popover },
   methods: {
     deleteStatus () {
       const confirmed = window.confirm(this.$t('status.delete_confirm'))

src/components/extra_buttons/extra_buttons.vue

@@ -1,11 +1,11 @@
 <template>
-  <v-popover
+  <Popover
     v-if="canDelete || canMute || canPin"
     trigger="click"
     placement="top"
     class="extra-button-popover"
   >
-    <div slot="popover">
+    <div slot="content">
       <div class="dropdown-menu">
         <button
           v-if="canMute && !status.thread_muted"
@@ -47,17 +47,19 @@
         </button>
       </div>
     </div>
-    <div class="button-icon">
+    <div
+      slot="trigger"
+      class="button-icon"
+    >
       <i class="icon-ellipsis" />
     </div>
-  </v-popover>
+  </Popover>
 </template>
 
 <script src="./extra_buttons.js" ></script>
 
 <style lang="scss">
 @import '../../_variables.scss';
-@import '../popper/popper.scss';
 
 .icon-ellipsis {
   cursor: pointer;

src/components/moderation_tools/moderation_tools.js

@@ -1,4 +1,5 @@
 import DialogModal from '../dialog_modal/dialog_modal.vue'
+import Popover from '../popover/popover.vue'
 
 const FORCE_NSFW = 'mrf_tag:media-force-nsfw'
 const STRIP_MEDIA = 'mrf_tag:media-strip'
@@ -14,7 +15,6 @@ const ModerationTools = {
   ],
   data () {
     return {
-      showDropDown: false,
       tags: {
         FORCE_NSFW,
         STRIP_MEDIA,
@@ -28,7 +28,8 @@ const ModerationTools = {
     }
   },
   components: {
-    DialogModal
+    DialogModal,
+    Popover
   },
   computed: {
     tagsSet () {

src/components/moderation_tools/moderation_tools.vue

@@ -1,13 +1,12 @@
 <template>
   <div>
-    <v-popover
+    <Popover
       trigger="click"
       class="moderation-tools-popover"
-      placement="bottom-end"
-      @show="showDropDown = true"
-      @hide="showDropDown = false"
+      placement="bottom"
+      :offset="{ y: 5 }"
     >
-      <div slot="popover">
+      <div slot="content">
         <div class="dropdown-menu">
           <span v-if="user.is_local">
             <button
@@ -122,12 +121,12 @@
         </div>
       </div>
       <button
+        slot="trigger"
         class="btn btn-default btn-block"
-        :class="{ pressed: showDropDown }"
       >
         {{ $t('user_card.admin_menu.moderation') }}
       </button>
-    </v-popover>
+    </Popover>
     <portal to="modal">
       <DialogModal
         v-if="showDeleteUserDialog"
@@ -160,7 +159,6 @@
 
 <style lang="scss">
 @import '../../_variables.scss';
-@import '../popper/popper.scss';
 
 .menu-checkbox {
   float: right;

src/components/popover/popover.js

@@ -0,0 +1,143 @@
+
+const Popover = {
+  name: 'Popover',
+  props: [
+    'trigger',
+    'placement',
+    'boundTo',
+    'padding',
+    'offset',
+    'popoverClass'
+  ],
+  data () {
+    return {
+      hidden: true,
+      styles: { opacity: 0 },
+      oldSize: { width: 0, height: 0 }
+    }
+  },
+  computed: {
+    display () {
+      return !this.hidden
+    }
+  },
+  methods: {
+    updateStyles () {
+      if (this.hidden) return { opacity: 0 }
+
+      // Popover will be anchored around this element
+      const anchorEl = this.$refs.trigger || this.$el
+      const screenBox = anchorEl.getBoundingClientRect()
+      // Screen position of the origin point for popover
+      const origin = { x: screenBox.left + screenBox.width * 0.5, y: screenBox.top }
+      const content = this.$refs.content
+      // Minor optimization, don't call a slow reflow call if we don't have to
+      const parentBounds = this.boundTo &&
+        (this.boundTo.x === 'container' || this.boundTo.y === 'container') &&
+        this.$el.offsetParent.getBoundingClientRect()
+      const padding = this.padding || {}
+
+      // What are the screen bounds for the popover? Viewport vs container
+      // when using viewport, using default padding values to dodge the navbar
+      const xBounds = this.boundTo && this.boundTo.x === 'container' ? {
+        min: parentBounds.left + (padding.left || 0),
+        max: parentBounds.right - (padding.right || 0)
+      } : {
+        min: 0 + (padding.left || 10),
+        max: window.innerWidth - (padding.right || 10)
+      }
+
+      const yBounds = this.boundTo && this.boundTo.y === 'container' ? {
+        min: parentBounds.top + (padding.top || 0),
+        max: parentBounds.bottom - (padding.bottom || 0)
+      } : {
+        min: 0 + (padding.top || 50),
+        max: window.innerHeight - (padding.bottom || 5)
+      }
+
+      let horizOffset = 0
+
+      // If overflowing from left, move it so that it doesn't
+      if ((origin.x - content.offsetWidth * 0.5) < xBounds.min) {
+        horizOffset = -(origin.x - content.offsetWidth * 0.5) + xBounds.min
+      }
+
+      // If overflowing from right, move it so that it doesn't
+      if ((origin.x + horizOffset + content.offsetWidth * 0.5) > xBounds.max) {
+        horizOffset -= (origin.x + horizOffset + content.offsetWidth * 0.5) - xBounds.max
+      }
+
+      // Default to whatever user wished with placement prop
+      let usingTop = this.placement !== 'bottom'
+
+      // Handle special cases, first force to displaying on top if there's not space on bottom,
+      // regardless of what placement value was. Then check if there's not space on top, and
+      // force to bottom, again regardless of what placement value was.
+      if (origin.y + content.offsetHeight > yBounds.max) usingTop = true
+      if (origin.y - content.offsetHeight < yBounds.min) usingTop = false
+
+      const yOffset = (this.offset && this.offset.y) || 0
+      const translateY = usingTop
+        ? -anchorEl.offsetHeight - yOffset - content.offsetHeight
+        : yOffset + yOffset
+
+      const xOffset = (this.offset && this.offset.x) || 0
+      const translateX = (anchorEl.offsetWidth * 0.5) - content.offsetWidth * 0.5 + horizOffset + xOffset
+
+      this.styles = {
+        opacity: 1,
+        transform: `translate(${Math.floor(translateX)}px, ${Math.floor(translateY)}px)`
+      }
+    },
+    showPopover () {
+      if (this.hidden) this.$emit('show')
+      this.hidden = false
+      this.$nextTick(this.updateStyles)
+    },
+    hidePopover () {
+      if (!this.hidden) this.$emit('close')
+      this.hidden = true
+      this.styles = { opacity: 0 }
+    },
+    onMouseenter (e) {
+      if (this.trigger === 'hover') this.showPopover()
+    },
+    onMouseleave (e) {
+      if (this.trigger === 'hover') this.hidePopover()
+    },
+    onClick (e) {
+      if (this.trigger === 'click') {
+        if (this.hidden) {
+          this.showPopover()
+        } else {
+          this.hidePopover()
+        }
+      }
+    },
+    onClickOutside (e) {
+      if (this.hidden) return
+      if (this.$el.contains(e.target)) return
+      this.hidePopover()
+    }
+  },
+  updated () {
+    // Monitor changes to content size, update styles only when content sizes have changed,
+    // that should be the only time we need to move the popover box if we don't care about scroll
+    // or resize
+    const content = this.$refs.content
+    if (!content) return
+    if (this.oldSize.width !== content.offsetWidth || this.oldSize.height !== content.offsetHeight) {
+      this.updateStyles()
+      this.oldSize = { width: content.offsetWidth, height: content.offsetHeight }
+    }
+  },
+  created () {
+    document.addEventListener('click', this.onClickOutside)
+  },
+  destroyed () {
+    document.removeEventListener('click', this.onClickOutside)
+    this.hidePopover()
+  }
+}
+
+export default Popover

src/components/popover/popover.vue

@@ -0,0 +1,98 @@
+<template>
+  <div
+    @mouseenter="onMouseenter"
+    @mouseleave="onMouseleave"
+  >
+    <div
+      ref="trigger"
+      @click="onClick"
+    >
+      <slot name="trigger" />
+    </div>
+    <div
+      v-if="display"
+      ref="content"
+      :style="styles"
+      class="popover"
+      :class="popoverClass"
+    >
+      <slot
+        name="content"
+        class="popover-inner"
+        :close="hidePopover"
+      />
+    </div>
+  </div>
+</template>
+
+<script src="./popover.js" />
+
+<style lang=scss>
+@import '../../_variables.scss';
+
+.popover {
+  z-index: 8;
+  position: absolute;
+  min-width: 0;
+  transition: opacity 0.3s;
+
+  box-shadow: 1px 1px 4px rgba(0,0,0,.6);
+  box-shadow: var(--panelShadow);
+  border-radius: $fallback--btnRadius;
+  border-radius: var(--btnRadius, $fallback--btnRadius);
+  background-color: $fallback--bg;
+  background-color: var(--bg, $fallback--bg);
+}
+
+.dropdown-menu {
+  display: block;
+  padding: .5rem 0;
+  font-size: 1rem;
+  text-align: left;
+  list-style: none;
+  max-width: 100vw;
+  z-index: 10;
+  white-space: nowrap;
+
+  .dropdown-divider {
+    height: 0;
+    margin: .5rem 0;
+    overflow: hidden;
+    border-top: 1px solid $fallback--border;
+    border-top: 1px solid var(--border, $fallback--border);
+  }
+
+  .dropdown-item {
+    line-height: 21px;
+    margin-right: 5px;
+    overflow: auto;
+    display: block;
+    padding: .25rem 1.0rem .25rem 1.5rem;
+    clear: both;
+    font-weight: 400;
+    text-align: inherit;
+    white-space: nowrap;
+    border: none;
+    border-radius: 0px;
+    background-color: transparent;
+    box-shadow: none;
+    width: 100%;
+    height: 100%;
+
+    &-icon {
+      padding-left: 0.5rem;
+
+      i {
+        margin-right: 0.25rem;
+      }
+    }
+
+    &:hover {
+      // TODO: improve the look on breeze themes
+      background-color: $fallback--fg;
+      background-color: var(--btn, $fallback--fg);
+      box-shadow: none;
+    }
+  }
+}
+</style>

src/components/popper/popper.scss

@@ -1,147 +0,0 @@
-@import '../../_variables.scss';
-
-.tooltip.popover {
-  z-index: 8;
-
-  .popover-inner {
-    box-shadow: 1px 1px 4px rgba(0,0,0,.6);
-    box-shadow: var(--panelShadow);
-    border-radius: $fallback--btnRadius;
-    border-radius: var(--btnRadius, $fallback--btnRadius);
-    background-color: $fallback--bg;
-    background-color: var(--bg, $fallback--bg);
-  }
-
-  .popover-arrow {
-    width: 0;
-    height: 0;
-    border-style: solid;
-    position: absolute;
-    margin: 5px;
-    border-color: $fallback--bg;
-    border-color: var(--bg, $fallback--bg);
-  }
-
-  &[x-placement^="top"] {
-    margin-bottom: 5px;
-
-    .popover-arrow {
-      border-width: 5px 5px 0 5px;
-      border-left-color: transparent !important;
-      border-right-color: transparent !important;
-      border-bottom-color: transparent !important;
-      bottom: -4px;
-      left: calc(50% - 5px);
-      margin-top: 0;
-      margin-bottom: 0;
-    }
-  }
-
-  &[x-placement^="bottom"] {
-    margin-top: 5px;
-
-    .popover-arrow {
-      border-width: 0 5px 5px 5px;
-      border-left-color: transparent !important;
-      border-right-color: transparent !important;
-      border-top-color: transparent !important;
-      top: -4px;
-      left: calc(50% - 5px);
-      margin-top: 0;
-      margin-bottom: 0;
-    }
-  }
-
-  &[x-placement^="right"] {
-    margin-left: 5px;
-
-    .popover-arrow {
-      border-width: 5px 5px 5px 0;
-      border-left-color: transparent !important;
-      border-top-color: transparent !important;
-      border-bottom-color: transparent !important;
-      left: -4px;
-      top: calc(50% - 5px);
-      margin-left: 0;
-      margin-right: 0;
-    }
-  }
-
-  &[x-placement^="left"] {
-    margin-right: 5px;
-
-    .popover-arrow {
-      border-width: 5px 0 5px 5px;
-      border-top-color: transparent !important;
-      border-right-color: transparent !important;
-      border-bottom-color: transparent !important;
-      right: -4px;
-      top: calc(50% - 5px);
-      margin-left: 0;
-      margin-right: 0;
-    }
-  }
-
-  &[aria-hidden='true'] {
-    visibility: hidden;
-    opacity: 0;
-    transition: opacity .15s, visibility .15s;
-  }
-
-  &[aria-hidden='false'] {
-    visibility: visible;
-    opacity: 1;
-    transition: opacity .15s;
-  }
-}
-
-.dropdown-menu {
-  display: block;
-  padding: .5rem 0;
-  font-size: 1rem;
-  text-align: left;
-  list-style: none;
-  max-width: 100vw;
-  z-index: 10;
-
-  .dropdown-divider {
-    height: 0;
-    margin: .5rem 0;
-    overflow: hidden;
-    border-top: 1px solid $fallback--border;
-    border-top: 1px solid var(--border, $fallback--border);
-  }
-
-  .dropdown-item {
-    line-height: 21px;
-    margin-right: 5px;
-    overflow: auto;
-    display: block;
-    padding: .25rem 1.0rem .25rem 1.5rem;
-    clear: both;
-    font-weight: 400;
-    text-align: inherit;
-    white-space: normal;
-    border: none;
-    border-radius: 0px;
-    background-color: transparent;
-    box-shadow: none;
-    width: 100%;
-    height: 100%;
-
-    &-icon {
-      padding-left: 0.5rem;
-
-      i {
-        margin-right: 0.25rem;
-      }
-    }
-
-    &:hover {
-      // TODO: improve the look on breeze themes
-      background-color: $fallback--fg;
-      background-color: var(--btn, $fallback--fg);
-      box-shadow: none;
-    }
-  }
-}

src/components/react_button/react_button.js

@@ -1,34 +1,25 @@
+import Popover from '../popover/popover.vue'
 import { mapGetters } from 'vuex'
 
 const ReactButton = {
   props: ['status', 'loggedIn'],
   data () {
     return {
-      showTooltip: false,
-      filterWord: '',
-      popperOptions: {
-        modifiers: {
-          preventOverflow: { padding: { top: 50 }, boundariesElement: 'viewport' }
-        }
-      }
+      filterWord: ''
     }
   },
+  components: {
+    Popover
+  },
   methods: {
-    openReactionSelect () {
-      this.showTooltip = true
-      this.filterWord = ''
-    },
-    closeReactionSelect () {
-      this.showTooltip = false
-    },
-    addReaction (event, emoji) {
+    addReaction (event, emoji, close) {
       const existingReaction = this.status.emoji_reactions.find(r => r.name === emoji)
       if (existingReaction && existingReaction.me) {
         this.$store.dispatch('unreactWithEmoji', { id: this.status.id, emoji })
       } else {
         this.$store.dispatch('reactWithEmoji', { id: this.status.id, emoji })
       }
-      this.closeReactionSelect()
+      close()
     }
   },
   computed: {

src/components/react_button/react_button.vue

@@ -1,13 +1,13 @@
 <template>
-  <v-popover
-    :popper-options="popperOptions"
-    :open="showTooltip"
-    trigger="manual"
+  <Popover
+    trigger="click"
     placement="top"
     class="react-button-popover"
-    @hide="closeReactionSelect"
   >
-    <div slot="popover">
+    <div
+      slot="content"
+      slot-scope="{close}"
+    >
       <div class="reaction-picker-filter">
         <input
           v-model="filterWord"
@@ -19,7 +19,7 @@
           v-for="emoji in commonEmojis"
           :key="emoji"
           class="emoji-button"
-          @click="addReaction($event, emoji)"
+          @click="addReaction($event, emoji, close)"
         >
           {{ emoji }}
         </span>
@@ -28,7 +28,7 @@
           v-for="(emoji, key) in emojis"
           :key="key"
           class="emoji-button"
-          @click="addReaction($event, emoji.replacement)"
+          @click="addReaction($event, emoji.replacement, close)"
         >
           {{ emoji.replacement }}
         </span>
@@ -37,14 +37,14 @@
     </div>
     <div
       v-if="loggedIn"
-      @click.prevent="openReactionSelect"
+      slot="trigger"
     >
       <i
         class="icon-smile button-icon add-reaction-button"
         :title="$t('tool_tip.add_reaction')"
       />
     </div>
-  </v-popover>
+  </Popover>
 </template>
 
 <script src="./react_button.js" ></script>

src/components/settings/settings.vue

@@ -76,9 +76,9 @@
                 <li>
                   <Checkbox v-model="useStreamingApi">
                     {{ $t('settings.useStreamingApi') }}
-                    <br/>
+                    <br>
                     <small>
-                    {{ $t('settings.useStreamingApiWarning') }}
+                      {{ $t('settings.useStreamingApiWarning') }}
                     </small>
                   </Checkbox>
                 </li>
@@ -92,6 +92,11 @@
                     {{ $t('settings.reply_link_preview') }}
                   </Checkbox>
                 </li>
+                <li>
+                  <Checkbox v-model="virtualScrolling">
+                    {{ $t('settings.virtual_scrolling') }}
+                  </Checkbox>
+                </li>
                 <li>
                   <Checkbox v-model="emojiReactionsOnTimeline">
                     {{ $t('settings.emoji_reactions_on_timeline') }}

src/components/status/status.js

@@ -36,7 +36,8 @@ const Status = {
     'inlineExpanded',
     'showPinned',
     'inProfile',
-    'profileUserId'
+    'profileUserId',
+    'virtualHidden'
   ],
   data () {
     return {
@@ -123,7 +124,7 @@ const Status = {
       return this.mergedConfig.hideFilteredStatuses
     },
     hideStatus () {
-      return (this.hideReply || this.deleted) || (this.muted && this.hideFilteredStatuses)
+      return (this.hideReply || this.deleted) || (this.muted && this.hideFilteredStatuses) || this.virtualHidden
     },
     isFocused () {
       // retweet or root of an expanded conversation

src/components/status/status.vue

@@ -177,6 +177,8 @@
                 <StatusPopover
                   v-if="!isPreview"
                   :status-id="status.in_reply_to_status_id"
+                  class="reply-to-popover"
+                  style="min-width: 0"
                 >
                   <a
                     class="reply-to"
@@ -564,11 +566,10 @@ $status-margin: 0.75em;
       align-items: stretch;
 
       > .reply-to-and-accountname > a {
+        overflow: hidden;
         max-width: 100%;
         text-overflow: ellipsis;
-        overflow: hidden;
         white-space: nowrap;
-        display: inline-block;
         word-break: break-all;
       }
     }
@@ -577,7 +578,6 @@ $status-margin: 0.75em;
       display: flex;
       height: 18px;
       margin-right: 0.5em;
-      overflow: hidden;
       max-width: 100%;
       .icon-reply {
         transform: scaleX(-1);
@@ -588,6 +588,10 @@ $status-margin: 0.75em;
       display: flex;
     }
 
+    .reply-to-popover {
+      min-width: 0;
+    }
+
     .reply-to {
       display: flex;
     }
@@ -595,6 +599,7 @@ $status-margin: 0.75em;
     .reply-to-text {
       overflow: hidden;
       text-overflow: ellipsis;
+      white-space: nowrap;
       margin: 0 0.4em 0 0.2em;
       color: $fallback--faint;
       color: var(--faint, $fallback--faint);

src/components/status_popover/status_popover.js

@@ -5,22 +5,14 @@ const StatusPopover = {
   props: [
     'statusId'
   ],
-  data () {
-    return {
-      popperOptions: {
-        modifiers: {
-          preventOverflow: { padding: { top: 50 }, boundariesElement: 'viewport' }
-        }
-      }
-    }
-  },
   computed: {
     status () {
       return find(this.$store.state.statuses.allStatuses, { id: this.statusId })
     }
   },
   components: {
-    Status: () => import('../status/status.vue')
+    Status: () => import('../status/status.vue'),
+    Popover: () => import('../popover/popover.vue')
   },
   methods: {
     enter () {

src/components/status_popover/status_popover.vue

@@ -1,11 +1,17 @@
 <template>
-  <v-popover
+  <Popover
+    trigger="hover"
     popover-class="status-popover"
-    placement="top-start"
-    :popper-options="popperOptions"
-    @show="enter()"
+    :bound-to="{ x: 'container' }"
+    :offset="{ x: 0, y: 5 }"
+    @show="enter"
   >
-    <template slot="popover">
+    <template slot="trigger">
+      <slot />
+    </template>
+    <div
+      slot="content"
+    >
       <Status
         v-if="status"
         :is-preview="true"
@@ -18,10 +24,8 @@
       >
         <i class="icon-spin4 animate-spin" />
       </div>
-    </template>
-
-    <slot />
-  </v-popover>
+    </div>
+  </Popover>
 </template>
 
 <script src="./status_popover.js" ></script>
@@ -29,44 +33,19 @@
 <style lang="scss">
 @import '../../_variables.scss';
 
-.tooltip.popover.status-popover {
+.status-popover {
   font-size: 1rem;
   min-width: 15em;
   max-width: 95%;
-  margin-left: 0.5em;
 
-  .popover-inner {
-    border-color: $fallback--border;
-    border-color: var(--border, $fallback--border);
-    border-style: solid;
-    border-width: 1px;
-    border-radius: $fallback--tooltipRadius;
-    border-radius: var(--tooltipRadius, $fallback--tooltipRadius);
-    box-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5);
-    box-shadow: var(--popupShadow);
-  }
-
-  .popover-arrow::before {
-    position: absolute;
-    content: '';
-    left: -7px;
-    border: solid 7px transparent;
-    z-index: -1;
-  }
-
-  &[x-placement^="bottom-start"] .popover-arrow::before {
-    top: -2px;
-    border-top-width: 0;
-    border-bottom-color: $fallback--border;
-    border-bottom-color: var(--border, $fallback--border);
-  }
-
-  &[x-placement^="top-start"] .popover-arrow::before {
-    bottom: -2px;
-    border-bottom-width: 0;
-    border-top-color: $fallback--border;
-    border-top-color: var(--border, $fallback--border);
-  }
+  border-color: $fallback--border;
+  border-color: var(--border, $fallback--border);
+  border-style: solid;
+  border-width: 1px;
+  border-radius: $fallback--tooltipRadius;
+  border-radius: var(--tooltipRadius, $fallback--tooltipRadius);
+  box-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5);
+  box-shadow: var(--popupShadow);
 
   .status-el.status-el {
     border: none;

src/components/still-image/still-image.js

@@ -18,14 +18,16 @@ const StillImage = {
   },
   methods: {
     onLoad () {
-      this.imageLoadHandler && this.imageLoadHandler(this.$refs.src)
+      const image = this.$refs.src
+      if (!image) return
+      this.imageLoadHandler && this.imageLoadHandler(image)
       const canvas = this.$refs.canvas
       if (!canvas) return
-      const width = this.$refs.src.naturalWidth
-      const height = this.$refs.src.naturalHeight
+      const width = image.naturalWidth
+      const height = image.naturalHeight
       canvas.width = width
       canvas.height = height
-      canvas.getContext('2d').drawImage(this.$refs.src, 0, 0, width, height)
+      canvas.getContext('2d').drawImage(image, 0, 0, width, height)
     },
     onError () {
       this.imageLoadError && this.imageLoadError()

src/components/timeline/timeline.js

@@ -32,7 +32,8 @@ const Timeline = {
     return {
       paused: false,
       unfocused: false,
-      bottomedOut: false
+      bottomedOut: false,
+      virtualScrollIndex: 0
     }
   },
   computed: {
@@ -68,6 +69,16 @@ const Timeline = {
     },
     pinnedStatusIdsObject () {
       return keyBy(this.pinnedStatusIds)
+    },
+    statusesToDisplay () {
+      const amount = this.timeline.visibleStatuses.length
+      const statusesPerSide = Math.ceil(Math.max(15, window.innerHeight / 80))
+      const min = Math.max(0, this.virtualScrollIndex - statusesPerSide)
+      const max = Math.min(amount, this.virtualScrollIndex + statusesPerSide)
+      return this.timeline.visibleStatuses.slice(min, max).map(_ => _.id)
+    },
+    virtualScrollingEnabled () {
+      return this.$store.getters.mergedConfig.virtualScrolling
     }
   },
   components: {
@@ -79,7 +90,7 @@ const Timeline = {
     const credentials = store.state.users.currentUser.credentials
     const showImmediately = this.timeline.visibleStatuses.length === 0
 
-    window.addEventListener('scroll', this.scrollLoad)
+    window.addEventListener('scroll', this.handleScroll)
 
     if (store.state.api.fetchers[this.timelineName]) { return false }
 
@@ -100,7 +111,7 @@ const Timeline = {
     window.addEventListener('keydown', this.handleShortKey)
   },
   destroyed () {
-    window.removeEventListener('scroll', this.scrollLoad)
+    window.removeEventListener('scroll', this.handleScroll)
     window.removeEventListener('keydown', this.handleShortKey)
     if (typeof document.hidden !== 'undefined') document.removeEventListener('visibilitychange', this.handleVisibilityChange, false)
     this.$store.commit('setLoading', { timeline: this.timelineName, value: false })
@@ -142,6 +153,49 @@ const Timeline = {
         }
       })
     }, 1000, this),
+    determineVisibleStatuses () {
+      if (!this.$refs.timeline) return
+
+      const statuses = this.$refs.timeline.children
+
+      if (statuses.length === 0) return
+
+      const height = Math.max(document.body.offsetHeight, window.pageYOffset)
+
+      const centerOfScreen = window.pageYOffset + (window.innerHeight * 0.5)
+
+      // Start from approximating the index of some visible status by using the
+      // the center of the screen on the timeline.
+      let approxIndex = Math.floor(statuses.length * (centerOfScreen / height))
+      let err = statuses[approxIndex].getBoundingClientRect().y
+
+      // if we have a previous scroll index that can be used, test if it's
+      // closer than the previous approximation, use it if so
+
+      const virtualScrollIndexY = statuses[this.virtualScrollIndex].getBoundingClientRect().y
+      if (
+        this.virtualScrollIndex < statuses.length &&
+        Math.abs(err) > virtualScrollIndexY
+      ) {
+        approxIndex = this.virtualScrollIndex
+        err = virtualScrollIndexY
+      }
+
+      // if the status is too far from viewport, check the next/previous ones if
+      // they happen to be better
+      while (err < -100 && approxIndex < statuses.length - 1) {
+        approxIndex++
+        err += statuses[approxIndex].offsetHeight
+      }
+      while (err > window.innerHeight + 100 && approxIndex > 0) {
+        err -= statuses[approxIndex].offsetHeight
+        approxIndex--
+      }
+
+      // this status is now the center point for virtual scrolling and visible
+      // statuses will be nearby statuses before and after it
+      this.virtualScrollIndex = approxIndex
+    },
     scrollLoad (e) {
       const bodyBRect = document.body.getBoundingClientRect()
       const height = Math.max(bodyBRect.height, -(bodyBRect.y))
@@ -152,6 +206,10 @@ const Timeline = {
         this.fetchOlderStatuses()
       }
     },
+    handleScroll: throttle(function (e) {
+      this.determineVisibleStatuses()
+      this.scrollLoad(e)
+    }, 100),
     handleVisibilityChange () {
       this.unfocused = document.hidden
     }

src/components/timeline/timeline.vue

@@ -34,7 +34,10 @@
       </div>
     </div>
     <div :class="classes.body">
-      <div class="timeline">
+      <div
+        ref="timeline"
+        class="timeline"
+      >
         <template v-for="statusId in pinnedStatusIds">
           <conversation
             v-if="timeline.statusesObject[statusId]"
@@ -56,6 +59,7 @@
             :collapsable="true"
             :in-profile="inProfile"
             :profile-user-id="userId"
+            :virtual-hidden="virtualScrollingEnabled && !statusesToDisplay.includes(status.id)"
           />
         </template>
       </div>

src/i18n/en.json

@@ -397,6 +397,7 @@
       "false": "no",
       "true": "yes"
     },
+    "virtual_scrolling": "Optimize timeline rendering",
     "fun": "Fun",
     "greentext": "Meme arrows",
     "notifications": "Notifications",

src/i18n/fi.json

@@ -231,7 +231,8 @@
     "values": {
       "false": "pois päältä",
       "true": "päällä"
-    }
+    },
+    "virtual_scrolling": "Optimoi aikajanan suorituskykyä"
   },
   "time": {
     "day": "{0} päivä",

src/main.js

@@ -31,7 +31,6 @@ import VueChatScroll from 'vue-chat-scroll'
 import VueClickOutside from 'v-click-outside'
 import PortalVue from 'portal-vue'
 import VBodyScrollLock from './directives/body_scroll_lock'
-import VTooltip from 'v-tooltip'
 
 import afterStoreSetup from './boot/after_store.js'
 
@@ -44,13 +43,6 @@ Vue.use(VueChatScroll)
 Vue.use(VueClickOutside)
 Vue.use(PortalVue)
 Vue.use(VBodyScrollLock)
-Vue.use(VTooltip, {
-  popover: {
-    defaultTrigger: 'hover click',
-    defaultContainer: false,
-    defaultOffset: 5
-  }
-})
 
 const i18n = new VueI18n({
   // By default, use the browser locale, we will update it if neccessary

src/modules/config.js

@@ -51,7 +51,8 @@ export const defaultState = {
   useContainFit: false,
   greentext: undefined, // instance default
   hidePostStats: undefined, // instance default
-  hideUserStats: undefined // instance default
+  hideUserStats: undefined, // instance default
+  virtualScrolling: undefined // instance default
 }
 
 // caching the instance default properties

src/modules/instance.js

@@ -34,6 +34,7 @@ const defaultState = {
   showFeaturesPanel: true,
   minimalScopesMode: false,
   greentext: false,
+  virtualScrolling: true,
 
   // Nasty stuff
   pleromaBackend: true,

yarn.lock

@@ -5941,11 +5941,6 @@ pngjs@^3.3.0:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/pngjs/-/pngjs-3.3.3.tgz#85173703bde3edac8998757b96e5821d0966a21b"
 
-popper.js@^1.15.0:
-  version "1.15.0"
-  resolved "https://registry.yarnpkg.com/popper.js/-/popper.js-1.15.0.tgz#5560b99bbad7647e9faa475c6b8056621f5a4ff2"
-  integrity sha512-w010cY1oCUmI+9KwwlWki+r5jxKfTFDVoadl7MSrIujHU5MJ5OR6HTDj6Xo8aoR/QsA56x8jKjA59qGH4ELtrA==
-
 portal-vue@^2.1.4:
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/portal-vue/-/portal-vue-2.1.4.tgz#1fc679d77e294dc8d026f1eb84aa467de11b392e"
@@ -7823,15 +7818,6 @@ v-click-outside@^2.1.1:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/v-click-outside/-/v-click-outside-2.1.3.tgz#b7297abe833a439dc0895e6418a494381e64b5e7"
 
-v-tooltip@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/v-tooltip/-/v-tooltip-2.0.2.tgz#8610d9eece2cc44fd66c12ef2f12eec6435cab9b"
-  integrity sha512-xQ+qzOFfywkLdjHknRPgMMupQNS8yJtf9Utd5Dxiu/0n4HtrxqsgDtN2MLZ0LKbburtSAQgyypuE/snM8bBZhw==
-  dependencies:
-    lodash "^4.17.11"
-    popper.js "^1.15.0"
-    vue-resize "^0.4.5"
-
 validate-npm-package-license@^3.0.1:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz#fc91f6b9c7ba15c857f4cb2c5defeec39d4f410a"
@@ -7906,11 +7892,6 @@ vue-loader@^14.0.0:
     vue-style-loader "^4.0.1"
     vue-template-es2015-compiler "^1.6.0"
 
-vue-resize@^0.4.5:
-  version "0.4.5"
-  resolved "https://registry.yarnpkg.com/vue-resize/-/vue-resize-0.4.5.tgz#4777a23042e3c05620d9cbda01c0b3cc5e32dcea"
-  integrity sha512-bhP7MlgJQ8TIkZJXAfDf78uJO+mEI3CaLABLjv0WNzr4CcGRGPIAItyWYnP6LsPA4Oq0WE+suidNs6dgpO4RHg==
-
 vue-router@^3.0.1:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/vue-router/-/vue-router-3.0.2.tgz#dedc67afe6c4e2bc25682c8b1c2a8c0d7c7e56be"