Separating Note observers into different types to avoid full screen refreshes.

app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -243,10 +243,12 @@ class Account(
 
   fun joinChannel(idHex: String) {
     followingChannels.add(idHex)
+    invalidateData()
   }
 
   fun leaveChannel(idHex: String) {
     followingChannels.remove(idHex)
+    invalidateData()
   }
 
   fun hideUser(pubkeyHex: String) {

app/src/main/java/com/vitorpamplona/amethyst/model/Note.kt

@@ -45,7 +45,7 @@ class Note(val idHex: String) {
         this.mentions = mentions
         this.replyTo = replyTo
 
-        invalidateData()
+        invalidateData(live)
     }
 
     fun formattedDateTime(timestamp: Long): String {
@@ -77,22 +77,22 @@ class Note(val idHex: String) {
 
     fun addReply(note: Note) {
         if (replies.add(note))
-            invalidateData()
+            invalidateData(liveReplies)
     }
 
     fun addBoost(note: Note) {
         if (boosts.add(note))
-            invalidateData()
+            invalidateData(liveBoosts)
     }
 
     fun addReaction(note: Note) {
         if (reactions.add(note))
-            invalidateData()
+            invalidateData(liveReactions)
     }
 
     fun addReport(note: Note) {
         if (reports.add(note))
-            invalidateData()
+            invalidateData(liveReports)
     }
 
     fun isReactedBy(user: User): Boolean {
@@ -110,10 +110,15 @@ class Note(val idHex: String) {
     // Observers line up here.
     val live: NoteLiveData = NoteLiveData(this)
 
+    val liveReactions: NoteLiveData = NoteLiveData(this)
+    val liveBoosts: NoteLiveData = NoteLiveData(this)
+    val liveReplies: NoteLiveData = NoteLiveData(this)
+    val liveReports: NoteLiveData = NoteLiveData(this)
+
     // Refreshes observers in batches.
     var handlerWaiting = false
     @Synchronized
-    fun invalidateData() {
+    fun invalidateData(live: NoteLiveData) {
         if (handlerWaiting) return
 
         handlerWaiting = true

app/src/main/java/com/vitorpamplona/amethyst/ui/components/ClickableNoteTag.kt

@@ -14,13 +14,12 @@ import com.vitorpamplona.amethyst.ui.note.toShortenHex
 
 @Composable
 fun ClickableNoteTag(
-  note: Note,
+  baesNote: Note,
   navController: NavController
 ) {
-  val innerNoteState by note.live.observeAsState()
   ClickableText(
-    text = AnnotatedString("@${innerNoteState?.note?.id?.toNote()?.toShortenHex()} "),
+    text = AnnotatedString("@${baesNote.id.toNote().toShortenHex()} "),
-    onClick = { navController.navigate("Note/${innerNoteState?.note?.idHex}") },
+    onClick = { navController.navigate("Note/${baesNote.idHex}") },
     style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary)
   )
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -186,7 +186,7 @@ fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Bool
                             RichTextViewer(eventContent, note.event?.tags, navController)
 
                         if (note.event !is ChannelMessageEvent) {
-                            ReactionsRowState(note, accountViewModel)
+                            ReactionsRow(note, accountViewModel)
                         }
 
                         Divider(

app/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRow.kt

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.ui.note
 
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -21,6 +20,7 @@ import androidx.compose.material.icons.outlined.Visibility
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -44,7 +44,19 @@ import com.vitorpamplona.amethyst.ui.actions.NewPostView
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
-fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewModel) {
+fun ReactionsRow(baseNote: Note, accountViewModel: AccountViewModel) {
+  val accountState by accountViewModel.accountLiveData.observeAsState()
+  val account = accountState?.account ?: return
+
+  val reactionsState by baseNote.liveReactions.observeAsState()
+  val reactedNote = reactionsState?.note
+
+  val boostsState by baseNote.liveBoosts.observeAsState()
+  val boostedNote = boostsState?.note
+
+  val repliesState by baseNote.liveReplies.observeAsState()
+  val replies = repliesState?.note?.replies ?: emptySet()
+
   val grayTint = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
 
   var popupExpanded by remember { mutableStateOf(false) }
@@ -65,7 +77,7 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
   ) {
     IconButton(
       modifier = Modifier.then(Modifier.size(24.dp)),
-      onClick = { if (account.isWriteable()) wantsToReplyTo = note }
+      onClick = { if (account.isWriteable()) wantsToReplyTo = baseNote }
     ) {
       Icon(
         painter = painterResource(R.drawable.ic_comment),
@@ -76,7 +88,7 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
     }
 
     Text(
-      "  ${showCount(note.replies?.size)}",
+      "  ${showCount(replies.size)}",
       fontSize = 14.sp,
       color = grayTint,
       modifier = Modifier.weight(1f)
@@ -84,9 +96,9 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
 
     IconButton(
       modifier = Modifier.then(Modifier.size(24.dp)),
-      onClick = { if (account.isWriteable()) accountViewModel.boost(note) }
+      onClick = { if (account.isWriteable()) accountViewModel.boost(baseNote) }
     ) {
-      if (note.isBoostedBy(account.userProfile())) {
+      if (boostedNote?.isBoostedBy(account.userProfile()) == true) {
         Icon(
           painter = painterResource(R.drawable.ic_retweeted),
           null,
@@ -104,7 +116,7 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
     }
 
     Text(
-      "  ${showCount(note.boosts?.size)}",
+      "  ${showCount(boostedNote?.boosts?.size)}",
       fontSize = 14.sp,
       color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
       modifier = Modifier.weight(1f)
@@ -112,9 +124,9 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
 
     IconButton(
       modifier = Modifier.then(Modifier.size(24.dp)),
-      onClick = { if (account.isWriteable()) accountViewModel.reactTo(note) }
+      onClick = { if (account.isWriteable()) accountViewModel.reactTo(baseNote) }
     ) {
-      if (note.isReactedBy(account.userProfile())) {
+      if (reactedNote?.isReactedBy(account.userProfile()) == true) {
         Icon(
           painter = painterResource(R.drawable.ic_liked),
           null,
@@ -132,7 +144,7 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
     }
 
     Text(
-      "  ${showCount(note.reactions?.size)}",
+      "  ${showCount(reactedNote?.reactions?.size)}",
       fontSize = 14.sp,
       color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
       modifier = Modifier.weight(1f)
@@ -154,7 +166,7 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
     Row(modifier = Modifier.weight(1f)) {
       AsyncImage(
         model = ImageRequest.Builder(LocalContext.current)
-          .data("https://counter.amethyst.social/${note.idHex}.svg?label=+&color=00000000")
+          .data("https://counter.amethyst.social/${baseNote.idHex}.svg?label=+&color=00000000")
           .crossfade(true)
           .diskCachePolicy(CachePolicy.DISABLED)
           .memoryCachePolicy(CachePolicy.ENABLED)
@@ -179,7 +191,7 @@ fun ReactionsRow(note: Note, account: Account, accountViewModel: AccountViewMode
     }
   }
 
-  NoteDropDownMenu(note, popupExpanded, { popupExpanded = false }, accountViewModel)
+  NoteDropDownMenu(baseNote, popupExpanded, { popupExpanded = false }, accountViewModel)
 }
 
 fun showCount(size: Int?): String {

app/src/main/java/com/vitorpamplona/amethyst/ui/note/ReactionsRowState.kt

@@ -1,20 +0,0 @@
-package com.vitorpamplona.amethyst.ui.note
-
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.livedata.observeAsState
-import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
-
-@Composable
-fun ReactionsRowState(baseNote: Note, accountViewModel: AccountViewModel) {
-  val accountState by accountViewModel.accountLiveData.observeAsState()
-  val account = accountState?.account
-
-  val noteState by baseNote.live.observeAsState()
-  val note = noteState?.note
-
-  if (account == null || note == null) return
-
-  ReactionsRow(note, account, accountViewModel)
-}

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/ThreadFeedView.kt

@@ -40,7 +40,7 @@ import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.ui.components.RichTextViewer
 import com.vitorpamplona.amethyst.ui.note.BlankNote
 import com.vitorpamplona.amethyst.ui.note.NoteCompose
-import com.vitorpamplona.amethyst.ui.note.ReactionsRowState
+import com.vitorpamplona.amethyst.ui.note.ReactionsRow
 import com.vitorpamplona.amethyst.ui.note.UsernameDisplay
 import com.vitorpamplona.amethyst.ui.note.timeAgoLong
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
@@ -205,7 +205,7 @@ fun NoteMaster(baseNote: Note, accountViewModel: AccountViewModel, navController
                     if (eventContent != null)
                         RichTextViewer(eventContent, note.event?.tags, navController)
 
-                    ReactionsRowState(note, accountViewModel)
+                    ReactionsRow(note, accountViewModel)
 
                     Divider(
                         modifier = Modifier.padding(top = 10.dp),