Adds Home-only empty feed screen.

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

@@ -54,7 +54,7 @@ fun RefreshingChatroomFeedView(
     scrollStateKey: String? = null,
     enablePullRefresh: Boolean = true,
 ) {
-    RefresheableView(viewModel, enablePullRefresh) {
+    RefresheableBox(viewModel, enablePullRefresh) {
         SaveableFeedState(viewModel, scrollStateKey) { listState ->
             RenderChatroomFeedView(
                 viewModel,

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

@@ -45,7 +45,7 @@ fun ChatroomListFeedView(
     nav: (String) -> Unit,
     markAsRead: MutableState<Boolean>,
 ) {
-    RefresheableView(viewModel, true) { CrossFadeState(viewModel, accountViewModel, nav, markAsRead) }
+    RefresheableBox(viewModel, true) { CrossFadeState(viewModel, accountViewModel, nav, markAsRead) }
 }
 
 @Composable

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

@@ -27,6 +27,7 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -56,6 +57,7 @@ import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.ui.note.NoteCompose
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.FeedPadding
+import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
 import kotlin.time.ExperimentalTime
 
 @Composable
@@ -67,13 +69,15 @@ fun RefresheableFeedView(
     accountViewModel: AccountViewModel,
     nav: (String) -> Unit,
 ) {
-    RefresheableView(viewModel, enablePullRefresh) {
-        SaveableFeedState(viewModel, routeForLastRead, scrollStateKey, accountViewModel, nav)
+    RefresheableBox(viewModel, enablePullRefresh) {
+        SaveableFeedState(viewModel, scrollStateKey) { listState ->
+            RenderFeedState(viewModel, accountViewModel, listState, nav, routeForLastRead)
+        }
     }
 }
 
 @Composable
-fun RefresheableView(
+fun RefresheableBox(
     viewModel: InvalidatableViewModel,
     enablePullRefresh: Boolean = true,
     content: @Composable () -> Unit,
@@ -108,19 +112,6 @@ fun RefresheableView(
     }
 }
 
-@Composable
-private fun SaveableFeedState(
-    viewModel: FeedViewModel,
-    routeForLastRead: String?,
-    scrollStateKey: String? = null,
-    accountViewModel: AccountViewModel,
-    nav: (String) -> Unit,
-) {
-    SaveableFeedState(viewModel, scrollStateKey) { listState ->
-        RenderFeed(viewModel, accountViewModel, listState, nav, routeForLastRead)
-    }
-}
-
 @Composable
 fun SaveableFeedState(
     viewModel: FeedViewModel,
@@ -158,12 +149,16 @@ fun SaveableGridFeedState(
 }
 
 @Composable
-private fun RenderFeed(
+fun RenderFeedState(
     viewModel: FeedViewModel,
     accountViewModel: AccountViewModel,
     listState: LazyListState,
     nav: (String) -> Unit,
     routeForLastRead: String?,
+    onLoaded: @Composable (FeedState.Loaded) -> Unit = { FeedLoaded(it, listState, routeForLastRead, accountViewModel, nav) },
+    onEmpty: @Composable () -> Unit = { FeedEmpty { viewModel.invalidateData() } },
+    onError: @Composable (String) -> Unit = { FeedError(it) { viewModel.invalidateData() } },
+    onLoading: @Composable () -> Unit = { LoadingFeed() },
 ) {
     val feedState by viewModel.feedContent.collectAsStateWithLifecycle()
 
@@ -172,24 +167,10 @@ private fun RenderFeed(
         animationSpec = tween(durationMillis = 100),
     ) { state ->
         when (state) {
-            is FeedState.Empty -> {
-                FeedEmpty { viewModel.invalidateData() }
-            }
-            is FeedState.FeedError -> {
-                FeedError(state.errorMessage) { viewModel.invalidateData() }
-            }
-            is FeedState.Loaded -> {
-                FeedLoaded(
-                    state = state,
-                    listState = listState,
-                    routeForLastRead = routeForLastRead,
-                    accountViewModel = accountViewModel,
-                    nav = nav,
-                )
-            }
-            is FeedState.Loading -> {
-                LoadingFeed()
-            }
+            is FeedState.Empty -> onEmpty()
+            is FeedState.FeedError -> onError(state.errorMessage)
+            is FeedState.Loaded -> onLoaded(state)
+            is FeedState.Loading -> onLoading()
         }
     }
 }
@@ -277,6 +258,7 @@ fun FeedError(
         verticalArrangement = Arrangement.Center,
     ) {
         Text("${stringResource(R.string.error_loading_replies)} $errorMessage")
+        Spacer(modifier = StdVertSpacer)
         Button(
             modifier = Modifier.align(Alignment.CenterHorizontally),
             onClick = onRefresh,
@@ -294,6 +276,7 @@ fun FeedEmpty(onRefresh: () -> Unit) {
         verticalArrangement = Arrangement.Center,
     ) {
         Text(stringResource(R.string.feed_is_empty))
+        Spacer(modifier = StdVertSpacer)
         OutlinedButton(onClick = onRefresh) { Text(text = stringResource(R.string.refresh)) }
     }
 }

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

@@ -45,7 +45,7 @@ fun RefreshingFeedStringFeedView(
     enablePullRefresh: Boolean = true,
     inner: @Composable (String) -> Unit,
 ) {
-    RefresheableView(viewModel, enablePullRefresh) { StringFeedView(viewModel, inner = inner) }
+    RefresheableBox(viewModel, enablePullRefresh) { StringFeedView(viewModel, inner = inner) }
 }
 
 @Composable

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

@@ -39,7 +39,7 @@ fun RefreshingFeedUserFeedView(
     nav: (String) -> Unit,
     enablePullRefresh: Boolean = true,
 ) {
-    RefresheableView(viewModel, enablePullRefresh) { UserFeedView(viewModel, accountViewModel, nav) }
+    RefresheableBox(viewModel, enablePullRefresh) { UserFeedView(viewModel, accountViewModel, nav) }
 }
 
 @Composable

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

@@ -69,7 +69,7 @@ import com.vitorpamplona.amethyst.ui.screen.NostrDiscoverCommunityFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.NostrDiscoverLiveFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.NostrDiscoverMarketplaceFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.PagerStateKeys
-import com.vitorpamplona.amethyst.ui.screen.RefresheableView
+import com.vitorpamplona.amethyst.ui.screen.RefresheableBox
 import com.vitorpamplona.amethyst.ui.screen.SaveableFeedState
 import com.vitorpamplona.amethyst.ui.screen.SaveableGridFeedState
 import com.vitorpamplona.amethyst.ui.screen.ScrollStateKeys
@@ -196,7 +196,7 @@ private fun DiscoverPages(
     }
 
     HorizontalPager(state = pagerState) { page ->
-        RefresheableView(tabs[page].viewModel, true) {
+        RefresheableBox(tabs[page].viewModel, true) {
             if (tabs[page].viewModel is NostrDiscoverMarketplaceFeedViewModel) {
                 SaveableGridFeedState(tabs[page].viewModel, scrollStateKey = tabs[page].scrollStateKey) {
                         listState ->

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

@@ -71,7 +71,7 @@ import com.vitorpamplona.amethyst.ui.elements.AddButton
 import com.vitorpamplona.amethyst.ui.screen.NostrHiddenAccountsFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.NostrHiddenWordsFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.NostrSpammerAccountsFeedViewModel
-import com.vitorpamplona.amethyst.ui.screen.RefresheableView
+import com.vitorpamplona.amethyst.ui.screen.RefresheableBox
 import com.vitorpamplona.amethyst.ui.screen.RefreshingFeedUserFeedView
 import com.vitorpamplona.amethyst.ui.screen.StringFeedView
 import com.vitorpamplona.amethyst.ui.screen.UserFeedViewModel
@@ -216,7 +216,7 @@ private fun HiddenWordsFeed(
     hiddenWordsViewModel: NostrHiddenWordsFeedViewModel,
     accountViewModel: AccountViewModel,
 ) {
-    RefresheableView(hiddenWordsViewModel, false) {
+    RefresheableBox(hiddenWordsViewModel, false) {
         StringFeedView(
             hiddenWordsViewModel,
             post = { AddMuteWordTextField(accountViewModel) },

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

@@ -22,11 +22,15 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn
 
 import androidx.compose.animation.Crossfade
 import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.pager.HorizontalPager
 import androidx.compose.foundation.pager.PagerState
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Tab
 import androidx.compose.material3.TabRow
 import androidx.compose.material3.Text
@@ -39,9 +43,11 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
@@ -54,10 +60,14 @@ import com.vitorpamplona.amethyst.ui.screen.FeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.NostrHomeFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.NostrHomeRepliesFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.PagerStateKeys
-import com.vitorpamplona.amethyst.ui.screen.RefresheableFeedView
+import com.vitorpamplona.amethyst.ui.screen.RefresheableBox
+import com.vitorpamplona.amethyst.ui.screen.RenderFeedState
+import com.vitorpamplona.amethyst.ui.screen.SaveableFeedState
 import com.vitorpamplona.amethyst.ui.screen.ScrollStateKeys
 import com.vitorpamplona.amethyst.ui.screen.rememberForeverPagerState
+import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
 import com.vitorpamplona.amethyst.ui.theme.TabRowHeight
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonRow
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.launch
@@ -181,7 +191,7 @@ private fun HomePages(
     }
 
     HorizontalPager(state = pagerState, userScrollEnabled = false) { page ->
-        RefresheableFeedView(
+        HomeFeeds(
             viewModel = tabs[page].viewModel,
             routeForLastRead = tabs[page].routeForLastRead,
             scrollStateKey = tabs[page].scrollStateKey,
@@ -191,6 +201,51 @@ private fun HomePages(
     }
 }
 
+@Composable
+fun HomeFeeds(
+    viewModel: FeedViewModel,
+    routeForLastRead: String?,
+    enablePullRefresh: Boolean = true,
+    scrollStateKey: String? = null,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit,
+) {
+    RefresheableBox(viewModel, enablePullRefresh) {
+        SaveableFeedState(viewModel, scrollStateKey) { listState ->
+            RenderFeedState(
+                viewModel = viewModel,
+                accountViewModel = accountViewModel,
+                listState = listState,
+                nav = nav,
+                routeForLastRead = routeForLastRead,
+                onEmpty = { HomeFeedEmpty { viewModel.invalidateData() } },
+            )
+        }
+    }
+}
+
+@Preview
+@Composable
+fun HomeFeedEmptyPreview() {
+    ThemeComparisonRow(
+        onDark = { HomeFeedEmpty {} },
+        onLight = { HomeFeedEmpty {} },
+    )
+}
+
+@Composable
+fun HomeFeedEmpty(onRefresh: () -> Unit) {
+    Column(
+        Modifier.fillMaxSize(),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+    ) {
+        Text(stringResource(R.string.feed_is_empty))
+        Spacer(modifier = StdVertSpacer)
+        OutlinedButton(onClick = onRefresh) { Text(text = stringResource(R.string.refresh)) }
+    }
+}
+
 @Composable
 fun CheckIfUrlIsOnline(
     url: String,

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

@@ -86,7 +86,7 @@ import com.vitorpamplona.amethyst.ui.screen.FeedState
 import com.vitorpamplona.amethyst.ui.screen.FeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.LoadingFeed
 import com.vitorpamplona.amethyst.ui.screen.NostrVideoFeedViewModel
-import com.vitorpamplona.amethyst.ui.screen.RefresheableView
+import com.vitorpamplona.amethyst.ui.screen.RefresheableBox
 import com.vitorpamplona.amethyst.ui.screen.ScrollStateKeys
 import com.vitorpamplona.amethyst.ui.screen.rememberForeverPagerState
 import com.vitorpamplona.amethyst.ui.theme.Size35Modifier
@@ -214,7 +214,7 @@ private fun LoadedState(
 
     WatchScrollToTop(videoFeedView, pagerState)
 
-    RefresheableView(viewModel = videoFeedView) {
+    RefresheableBox(viewModel = videoFeedView) {
         SlidingCarousel(
             state.feed,
             pagerState,