follow-up(ChatView) - align scroll button position with mobile clients

src/components/ChatView.vue

@@ -41,27 +41,48 @@
 		<MessagesList role="region"
 			:aria-label="t('spreed', 'Conversation messages')"
 			:token="token"
+			:is-chat-scrolled-to-bottom.sync="isChatScrolledToBottom"
 			:is-visible="isVisible" />
 		<NewMessage v-if="containerId"
+			ref="newMessage"
 			role="region"
 			:token="token"
 			:container="containerId"
 			has-typing-indicator
 			:aria-label="t('spreed', 'Post message')" />
+		<transition name="fade">
+			<NcButton v-show="!isChatScrolledToBottom"
+				type="secondary"
+				:aria-label="t('spreed', 'Scroll to bottom')"
+				class="scroll-to-bottom"
+				:style="`bottom: ${scrollButtonOffset}px`"
+				@click="smoothScrollToBottom">
+				<template #icon>
+					<ChevronDoubleDown :size="20" />
+				</template>
+			</NcButton>
+		</transition>
 	</div>
 </template>
 
 <script>
+import ChevronDoubleDown from 'vue-material-design-icons/ChevronDoubleDown.vue'
+
+import NcButton from '@nextcloud/vue/dist/Components/NcButton.js'
+
 import MessagesList from './MessagesList/MessagesList.vue'
 import NewMessage from './NewMessage/NewMessage.vue'
 
 import { CONVERSATION } from '../constants.js'
+import { EventBus } from '../services/EventBus.js'
 
 export default {
 
 	name: 'ChatView',
 
 	components: {
+		NcButton,
+		ChevronDoubleDown,
 		MessagesList,
 		NewMessage,
 	},
@@ -75,6 +96,8 @@ export default {
 
 	data() {
 		return {
+			isChatScrolledToBottom: true,
+			scrollButtonOffset: undefined,
 			isDraggingOver: false,
 			containerId: undefined,
 		}
@@ -104,7 +127,24 @@ export default {
 		token() {
 			return this.$store.getters.getToken()
 		},
+
+		typingParticipants() {
+			return this.$store.getters.participantsListTyping(this.token)
+		},
 	},
+
+	watch: {
+		typingParticipants: {
+			immediate: true,
+			handler() {
+				this.$nextTick(() => {
+					// offset from NewMessage component by 8px, with its min-height: 69px as a fallback
+					this.scrollButtonOffset = (this.$refs.newMessage?.$el?.clientHeight ?? 69) + 8
+				})
+			},
+		},
+	},
+
 	mounted() {
 		// Postpone render of NewMessage until application is mounted
 		this.containerId = this.$store.getters.getMainContainerSelector()
@@ -142,6 +182,10 @@ export default {
 			// Uploads and shares the files
 			this.$store.dispatch('initialiseUpload', { files, token: this.token, uploadId })
 		},
+
+		smoothScrollToBottom() {
+			EventBus.$emit('smooth-scroll-chat-to-bottom')
+		},
 	},
 
 }
@@ -183,6 +227,11 @@ export default {
 	}
 }
 
+.scroll-to-bottom {
+	position: absolute !important;
+	right: 24px;
+}
+
 .slide {
 	&-enter {
 		transform: translateY(-50%);

src/components/MessagesList/MessagesList.vue

@@ -56,17 +56,6 @@ get the messagesList array and loop through the list to generate the messages.
 				<Message :size="64" />
 			</template>
 		</NcEmptyContent>
-		<transition name="fade">
-			<NcButton v-show="!isChatScrolledToBottom"
-				type="secondary"
-				:aria-label="scrollToBottomAriaLabel"
-				class="scroll-to-bottom"
-				@click="smoothScrollToBottom">
-				<template #icon>
-					<ChevronDown :size="20" />
-				</template>
-			</NcButton>
-		</transition>
 	</div>
 </template>
 
@@ -75,15 +64,13 @@ import debounce from 'debounce'
 import uniqueId from 'lodash/uniqueId.js'
 import { computed } from 'vue'
 
-import ChevronDown from 'vue-material-design-icons/ChevronDown.vue'
 import Message from 'vue-material-design-icons/Message.vue'
 
 import Axios from '@nextcloud/axios'
 import { getCapabilities } from '@nextcloud/capabilities'
 import { subscribe, unsubscribe } from '@nextcloud/event-bus'
 import moment from '@nextcloud/moment'
 
-import NcButton from '@nextcloud/vue/dist/Components/NcButton.js'
 import NcEmptyContent from '@nextcloud/vue/dist/Components/NcEmptyContent.js'
 
 import LoadingPlaceholder from '../LoadingPlaceholder.vue'
@@ -99,9 +86,7 @@ export default {
 	components: {
 		LoadingPlaceholder,
 		MessagesGroup,
-		ChevronDown,
 		Message,
-		NcButton,
 		NcEmptyContent,
 	},
 
@@ -122,12 +107,19 @@ export default {
 			required: true,
 		},
 
+		isChatScrolledToBottom: {
+			type: Boolean,
+			default: true,
+		},
+
 		isVisible: {
 			type: Boolean,
 			default: true,
 		},
 	},
 
+	emits: ['update:is-chat-scrolled-to-bottom'],
+
 	setup() {
 		const isInCall = useIsInCall()
 		return { isInCall }
@@ -156,7 +148,6 @@ export default {
 
 			isFocusingMessage: false,
 
-			isChatScrolledToBottom: true,
 			/**
 			 * Quick edit option to fall back to the loading history and then new messages
 			 */
@@ -258,10 +249,6 @@ export default {
 		chatIdentifier() {
 			return this.token + ':' + this.isParticipant + ':' + this.isInLobby + ':' + this.viewId
 		},
-
-		scrollToBottomAriaLabel() {
-			return t('spreed', 'Scroll to bottom')
-		},
 	},
 
 	watch: {
@@ -276,7 +263,7 @@ export default {
 				if (oldValue) {
 					this.$store.dispatch('cancelLookForNewMessages', { requestId: oldValue })
 				}
-				this.isChatScrolledToBottom = true
+				this.$emit('update:is-chat-scrolled-to-bottom', true)
 				this.handleStartGettingMessagesPreconditions()
 
 				// Remove expired messages when joining a room
@@ -374,9 +361,9 @@ export default {
 
 			if (!message1IsSystem // System messages are grouped independently of author
 				&& ((message1.actorType !== message2.actorType // Otherwise the type and id need to match
-					|| message1.actorId !== message2.actorId)
-				|| (message1.actorType === ATTENDEE.ACTOR_TYPE.BRIDGED // Or, if the message is bridged, display names also need to match
-					&& message1.actorDisplayName !== message2.actorDisplayName))) {
+						|| message1.actorId !== message2.actorId)
+					|| (message1.actorType === ATTENDEE.ACTOR_TYPE.BRIDGED // Or, if the message is bridged, display names also need to match
+						&& message1.actorDisplayName !== message2.actorDisplayName))) {
 				return false
 			}
 
@@ -1037,7 +1024,7 @@ export default {
 		},
 
 		setChatScrolledToBottom(boolean) {
-			this.isChatScrolledToBottom = boolean
+			this.$emit('update:is-chat-scrolled-to-bottom', boolean)
 			if (boolean) {
 				// mark as read if marker was seen
 				// we have to do this early because unfocusing the window will remove the stickiness
@@ -1073,11 +1060,4 @@ export default {
 	}
 }
 
-.scroll-to-bottom {
-	position: absolute !important;
-	bottom: 140px;
-	right: 24px;
-	z-index: 2;
-}
-
 </style>