fixed tons of stuff, at least it looks normalish on desktop

src/components/chat/chat.js

@@ -6,7 +6,7 @@ import PostStatusForm from '../post_status_form/post_status_form.vue'
 import ChatTitle from '../chat_title/chat_title.vue'
 import chatService from '../../services/chat_service/chat_service.js'
 import { promiseInterval } from '../../services/promise_interval/promise_interval.js'
-import { getScrollPosition, getNewTopPosition, isBottomedOut, scrollableContainerHeight, isScrollable } from './chat_layout_utils.js'
+import { getScrollPosition, getNewTopPosition, isBottomedOut } from './chat_layout_utils.js'
 import { library } from '@fortawesome/fontawesome-svg-core'
 import {
   faChevronDown,
@@ -20,7 +20,7 @@ library.add(
 )
 
 const BOTTOMED_OUT_OFFSET = 10
-const JUMP_TO_BOTTOM_BUTTON_VISIBILITY_OFFSET = 150
+const JUMP_TO_BOTTOM_BUTTON_VISIBILITY_OFFSET = 10
 const SAFE_RESIZE_TIME_OFFSET = 100
 const MARK_AS_READ_DELAY = 1500
 const MAX_RETRIES = 10
@@ -52,7 +52,6 @@ const Chat = {
     }
 
     this.$nextTick(() => {
-      this.updateScrollableContainerHeight()
       this.handleResize()
     })
     this.setChatLayout()
@@ -132,7 +131,6 @@ const Chat = {
     onFilesDropped () {
       this.$nextTick(() => {
         this.handleResize()
-        this.updateScrollableContainerHeight()
       })
     },
     handleVisibilityChange () {
@@ -154,10 +152,6 @@ const Chat = {
       if (html) {
         html.classList.add('chat-layout')
       }
-
-      this.$nextTick(() => {
-        this.updateScrollableContainerHeight()
-      })
     },
     unsetChatLayout () {
       let html = document.querySelector('html')
@@ -167,17 +161,9 @@ const Chat = {
     },
     handleLayoutChange () {
       this.$nextTick(() => {
-        this.updateScrollableContainerHeight()
         this.scrollDown()
       })
     },
-    // Ensures the proper position of the posting form in the mobile layout (the mobile browser panel does not overlap or hide it)
-    updateScrollableContainerHeight () {
-      const header = this.$refs.header
-      const footer = this.$refs.footer
-      const inner = this.mobileLayout ? window.document.body : this.$refs.inner
-      this.scrollableContainerHeight = scrollableContainerHeight(inner, header, footer) + 'px'
-    },
     // Preserves the scroll position when OSK appears or the posting form changes its height.
     handleResize (opts = {}) {
       const { expand = false, delayed = false } = opts
@@ -190,17 +176,14 @@ const Chat = {
       }
 
       this.$nextTick(() => {
-        this.updateScrollableContainerHeight()
-
         const { offsetHeight = undefined } = this.lastScrollPosition
-        this.lastScrollPosition = getScrollPosition(this.$refs.scrollable)
+        this.lastScrollPosition = getScrollPosition(document.getElementById('content'))
 
         const diff = this.lastScrollPosition.offsetHeight - offsetHeight
         if (diff < 0 || (!this.bottomedOut() && expand)) {
           this.$nextTick(() => {
-            this.updateScrollableContainerHeight()
-            this.$refs.scrollable.scrollTo({
-              top: this.$refs.scrollable.scrollTop - diff,
+            document.getElementById('content').scrollTo({
+              top: document.getElementById('content').scrollTop - diff,
               left: 0
             })
           })
@@ -209,7 +192,7 @@ const Chat = {
     },
     scrollDown (options = {}) {
       const { behavior = 'auto', forceRead = false } = options
-      const scrollable = this.$refs.scrollable
+      const scrollable = document.getElementById('content')
       if (!scrollable) { return }
       this.$nextTick(() => {
         scrollable.scrollTo({ top: scrollable.scrollHeight, left: 0, behavior })
@@ -228,10 +211,10 @@ const Chat = {
       })
     },
     bottomedOut (offset) {
-      return isBottomedOut(this.$refs.scrollable, offset)
+      return isBottomedOut(document.getElementById('content'), offset)
     },
     reachedTop () {
-      const scrollable = this.$refs.scrollable
+      const scrollable = document.getElementById('content')
       return scrollable && scrollable.scrollTop <= 0
     },
     cullOlderCheck () {
@@ -263,7 +246,7 @@ const Chat = {
       }
     }, 200),
     handleScrollUp (positionBeforeLoading) {
-      const positionAfterLoading = getScrollPosition(this.$refs.scrollable)
+      const positionAfterLoading = getScrollPosition(document.getElementById('content'))
       this.$refs.scrollable.scrollTo({
         top: getNewTopPosition(positionBeforeLoading, positionAfterLoading),
         left: 0
@@ -285,22 +268,18 @@ const Chat = {
             chatService.clear(chatMessageService)
           }
 
-          const positionBeforeUpdate = getScrollPosition(this.$refs.scrollable)
+          const positionBeforeUpdate = getScrollPosition(document.getElementById('content'))
           this.$store.dispatch('addChatMessages', { chatId, messages }).then(() => {
             this.$nextTick(() => {
               if (fetchOlderMessages) {
                 this.handleScrollUp(positionBeforeUpdate)
               }
 
-              if (isFirstFetch) {
-                this.updateScrollableContainerHeight()
-              }
-
               // In vertical screens, the first batch of fetched messages may not always take the
               // full height of the scrollable container.
               // If this is the case, we want to fetch the messages until the scrollable container
               // is fully populated so that the user has the ability to scroll up and load the history.
-              if (!isScrollable(this.$refs.scrollable) && messages.length > 0) {
+              if (messages.length > 0) {
                 this.fetchChat({ maxId: this.currentChatMessageService.minId })
               }
             })
@@ -336,9 +315,6 @@ const Chat = {
         this.handleResize()
         // When the posting form size changes because of a media attachment, we need an extra resize
         // to account for the potential delay in the DOM update.
-        setTimeout(() => {
-          this.updateScrollableContainerHeight()
-        }, SAFE_RESIZE_TIME_OFFSET)
         this.scrollDown({ forceRead: true })
       })
     },

src/components/chat/chat.scss

@@ -1,19 +1,12 @@
 .chat-view {
   display: flex;
-  height: calc(100vh - 60px);
-  width: 100%;
-
-  .chat-title {
-    // prevents chat header jumping on when the user avatar loads
-    height: 28px;
-  }
+  height: 100%;
 
   .chat-view-inner {
     height: auto;
     width: 100%;
     overflow: visible;
     display: flex;
-    margin: 0.5em 0.5em 0 0.5em;
   }
 
   .chat-view-body {
@@ -32,11 +25,9 @@
     }
   }
 
-  .scrollable-message-list {
+  .message-list {
     padding: 0 0.8em;
     height: 100%;
-    overflow-y: scroll;
-    overflow-x: hidden;
     display: flex;
     flex-direction: column;
   }
@@ -44,12 +35,13 @@
   .footer {
     position: sticky;
     bottom: 0;
+    background-color: $fallback--bg;
+    background-color: var(--bg, $fallback--bg);
   }
 
   .chat-view-heading {
     align-items: center;
     justify-content: space-between;
-    top: 50px;
     display: flex;
     z-index: 2;
     position: sticky;

src/components/chat/chat.vue

@@ -8,7 +8,7 @@
       >
         <div
           ref="header"
-          class="panel-heading chat-view-heading mobile-hidden"
+          class="panel-heading -sticky chat-view-heading mobile-hidden"
         >
           <a
             class="go-back-button"
@@ -27,10 +27,8 @@
           </div>
         </div>
         <div
-          ref="scrollable"
-          class="scrollable-message-list"
+          class="message-list"
           :style="{ height: scrollableContainerHeight }"
-          @scroll="handleScroll"
         >
           <template v-if="!errorLoadingChat">
             <ChatMessage

src/components/chat/chat_layout_utils.js

@@ -1,5 +1,6 @@
 // Captures a scroll position
 export const getScrollPosition = (el) => {
+  console.log(el)
   return {
     scrollTop: el.scrollTop,
     scrollHeight: el.scrollHeight,