share the artwork hero layout and give playlists the album layout

app/src/main/kotlin/com/subtracks/ui/components/HeroDetailScaffold.kt

@@ -0,0 +1,277 @@
+package com.subtracks.ui.components
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.navigationBars
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListScope
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.rounded.ArrowBack
+import androidx.compose.material.icons.rounded.Download
+import androidx.compose.material.icons.rounded.MoreHoriz
+import androidx.compose.material.icons.rounded.PlayArrow
+import androidx.compose.material.icons.rounded.Shuffle
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilledIconButton
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LocalContentColor
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.derivedStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableFloatStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.draw.shadow
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.graphics.lerp
+import androidx.compose.ui.layout.onGloballyPositioned
+import androidx.compose.ui.layout.onSizeChanged
+import androidx.compose.ui.layout.positionInParent
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import com.subtracks.data.model.CoverArtRef
+import com.subtracks.ui.theme.ArtworkColors
+import com.subtracks.ui.theme.ArtworkTheme
+import com.subtracks.ui.theme.HeroGradient
+import com.subtracks.ui.theme.gradientColorAt
+import com.subtracks.ui.theme.heroDarkenAt
+
+private const val GRADIENT_SCREENS = 2.0f
+private const val FADE_DISTANCE_DP = 64
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun HeroDetailScaffold(
+    artwork: ArtworkColors?,
+    title: String,
+    onBack: () -> Unit,
+    header: @Composable (controlsModifier: Modifier, topInset: Dp) -> Unit,
+    content: LazyListScope.(rowModifier: Modifier) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onBackground) {
+        ArtworkTheme(artwork) {
+            BoxWithConstraints(modifier.fillMaxSize().background(Color.Black)) {
+                val listState = rememberLazyListState()
+                val fill = rememberViewportFill(listState)
+                val density = LocalDensity.current
+                val gradientHeightPx = with(density) { (maxHeight * GRADIENT_SCREENS).toPx() }
+                val screenHeightPx = with(density) { maxHeight.toPx() }
+                val statusBarTop = WindowInsets.statusBars.getTop(density)
+                val statusBarDp = with(density) { statusBarTop.toDp() }
+                val navBarBottom = WindowInsets.navigationBars.getBottom(density)
+                val barHeightPx = statusBarTop + with(density) { TopAppBarDefaults.TopAppBarExpandedHeight.toPx() }
+                val fadeDistancePx = with(density) { FADE_DISTANCE_DP.dp.toPx() }
+
+                var headerHeightPx by remember { mutableFloatStateOf(0f) }
+                var rowHeightPx by remember { mutableFloatStateOf(0f) }
+                var controlsTopPx by remember { mutableFloatStateOf(0f) }
+                val scrollPx by remember {
+                    derivedStateOf {
+                        val index = listState.firstVisibleItemIndex
+                        val before = if (index <= 0) 0f else headerHeightPx + rowHeightPx * (index - 1)
+                        (before + listState.firstVisibleItemScrollOffset).coerceAtLeast(0f)
+                    }
+                }
+                val barFraction by remember {
+                    derivedStateOf {
+                        if (controlsTopPx <= 0f || fadeDistancePx <= 0f) {
+                            0f
+                        } else {
+                            ((scrollPx - (controlsTopPx - barHeightPx)) / fadeDistancePx).coerceIn(0f, 1f)
+                        }
+                    }
+                }
+                val barColor by
+                    remember(artwork, barHeightPx, gradientHeightPx, screenHeightPx) {
+                        derivedStateOf {
+                            if (artwork == null || gradientHeightPx <= 0f) {
+                                Color.Black
+                            } else {
+                                val mid = scrollPx + barHeightPx / 2f
+                                lerp(
+                                    artwork.gradientColorAt(mid / gradientHeightPx),
+                                    artwork.darkPrimary,
+                                    heroDarkenAt(mid, screenHeightPx),
+                                )
+                            }
+                        }
+                    }
+
+                HeroGradient(
+                    colors = artwork,
+                    scrollPx = { scrollPx },
+                    modifier = Modifier.fillMaxSize(),
+                )
+
+                LazyColumn(
+                    state = listState,
+                    contentPadding =
+                        PaddingValues(
+                            bottom = 16.dp + with(density) { navBarBottom.toDp() },
+                        ),
+                    modifier = Modifier.fillMaxSize(),
+                ) {
+                    item {
+                        Box(Modifier.onSizeChanged { headerHeightPx = it.height.toFloat() }) {
+                            header(
+                                Modifier.onGloballyPositioned { controlsTopPx = it.positionInParent().y },
+                                statusBarDp,
+                            )
+                        }
+                    }
+                    content(Modifier.onSizeChanged { rowHeightPx = it.height.toFloat() })
+                    item { Spacer(Modifier.height(fill)) }
+                }
+
+                Box(
+                    Modifier
+                        .align(Alignment.TopStart)
+                        .fillMaxWidth()
+                        .height(statusBarDp + 8.dp)
+                        .background(
+                            Brush.verticalGradient(
+                                listOf(Color.Black.copy(alpha = 0.55f), Color.Transparent),
+                            ),
+                        ).graphicsLayer { alpha = 1f - barFraction },
+                )
+
+                TopAppBar(
+                    title = {
+                        Text(
+                            text = title,
+                            style = MaterialTheme.typography.headlineMedium,
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
+                            modifier = Modifier.graphicsLayer { alpha = barFraction },
+                        )
+                    },
+                    navigationIcon = {
+                        IconButton(onClick = onBack, modifier = Modifier.graphicsLayer { alpha = barFraction }) {
+                            Icon(Icons.AutoMirrored.Rounded.ArrowBack, contentDescription = "Back")
+                        }
+                    },
+                    colors = TopAppBarDefaults.topAppBarColors(containerColor = Color.Transparent),
+                    modifier =
+                        Modifier
+                            .align(Alignment.TopStart)
+                            .drawBehind { drawRect(barColor.copy(alpha = barFraction)) }
+                            .clickable(
+                                interactionSource = remember { MutableInteractionSource() },
+                                indication = null,
+                            ) {},
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun HeroHeader(
+    art: CoverArtRef?,
+    name: String,
+    subtitle: String,
+    hasSongs: Boolean,
+    onPlay: () -> Unit,
+    onShuffle: () -> Unit,
+    onDownload: () -> Unit,
+    onMore: () -> Unit,
+    topInset: Dp,
+    controlsModifier: Modifier = Modifier,
+    thumbnailRef: CoverArtRef? = null,
+    modifier: Modifier = Modifier,
+) {
+    Column(
+        modifier =
+            modifier
+                .fillMaxWidth()
+                .padding(start = 24.dp, end = 24.dp, top = topInset + 24.dp, bottom = 16.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+    ) {
+        CoverArt(
+            ref = art,
+            name = name,
+            thumbnailRef = thumbnailRef,
+            modifier =
+                Modifier
+                    .fillMaxWidth(0.86f)
+                    .aspectRatio(1f)
+                    .shadow(elevation = 3.dp, shape = RoundedCornerShape(2.dp), clip = false)
+                    .clip(RoundedCornerShape(2.dp)),
+        )
+        Spacer(Modifier.height(20.dp))
+        Text(
+            text = name,
+            style = MaterialTheme.typography.headlineMedium,
+            textAlign = TextAlign.Center,
+            maxLines = 2,
+            overflow = TextOverflow.Ellipsis,
+        )
+        if (subtitle.isNotEmpty()) {
+            Spacer(Modifier.height(4.dp))
+            Text(
+                text = subtitle,
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                textAlign = TextAlign.Center,
+                maxLines = 2,
+                overflow = TextOverflow.Ellipsis,
+            )
+        }
+        Spacer(Modifier.height(20.dp))
+        Row(
+            modifier = controlsModifier,
+            horizontalArrangement = Arrangement.spacedBy(16.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            IconButton(onClick = onDownload) {
+                Icon(Icons.Rounded.Download, contentDescription = "Download")
+            }
+            Button(onClick = onPlay, enabled = hasSongs) {
+                Icon(Icons.Rounded.PlayArrow, contentDescription = null)
+                Spacer(Modifier.width(8.dp))
+                Text("Play")
+            }
+            FilledIconButton(onClick = onShuffle, enabled = hasSongs) {
+                Icon(Icons.Rounded.Shuffle, contentDescription = "Shuffle play")
+            }
+            IconButton(onClick = onMore) {
+                Icon(Icons.Rounded.MoreHoriz, contentDescription = "More options")
+            }
+        }
+    }
+}

app/src/main/kotlin/com/subtracks/ui/library/AlbumDetailScreen.kt

@@ -1,89 +1,26 @@
 package com.subtracks.ui.library
 
-import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.interaction.MutableInteractionSource
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.BoxWithConstraints
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.PaddingValues
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.WindowInsets
-import androidx.compose.foundation.layout.aspectRatio
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.navigationBars
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.statusBars
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
-import androidx.compose.foundation.lazy.rememberLazyListState
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.rounded.ArrowBack
-import androidx.compose.material.icons.rounded.Download
-import androidx.compose.material.icons.rounded.MoreHoriz
-import androidx.compose.material.icons.rounded.PlayArrow
-import androidx.compose.material.icons.rounded.Shuffle
-import androidx.compose.material3.Button
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.FilledIconButton
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.LocalContentColor
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBar
-import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.CompositionLocalProvider
-import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableFloatStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
-import androidx.compose.ui.draw.drawBehind
-import androidx.compose.ui.draw.shadow
-import androidx.compose.ui.graphics.Brush
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.graphicsLayer
-import androidx.compose.ui.graphics.lerp
-import androidx.compose.ui.layout.onGloballyPositioned
-import androidx.compose.ui.layout.onSizeChanged
-import androidx.compose.ui.layout.positionInParent
-import androidx.compose.ui.platform.LocalDensity
-import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.text.style.TextOverflow
-import androidx.compose.ui.unit.Dp
-import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.subtracks.data.model.Album
 import com.subtracks.data.model.CoverArtRef
 import com.subtracks.data.model.QueueKind
 import com.subtracks.data.model.Song
 import com.subtracks.playback.PlaybackController
-import com.subtracks.ui.components.CoverArt
-import com.subtracks.ui.components.rememberViewportFill
+import com.subtracks.ui.components.HeroDetailScaffold
+import com.subtracks.ui.components.HeroHeader
 import com.subtracks.ui.theme.ArtworkColors
-import com.subtracks.ui.theme.ArtworkTheme
-import com.subtracks.ui.theme.HeroGradient
-import com.subtracks.ui.theme.gradientColorAt
-import com.subtracks.ui.theme.heroDarkenAt
 import com.subtracks.ui.theme.rememberArtworkColors
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
 import org.koin.core.parameter.parametersOf
 
 private const val DOT = "\u00B7"
-private const val GRADIENT_SCREENS = 2.0f
-private const val FADE_DISTANCE_DP = 64
 private const val THEME_TRANSITION_MS = 100
 
 @Composable
@@ -110,7 +47,6 @@ fun AlbumDetailRoute(
     )
 }
 
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun AlbumDetailScreen(
     album: Album?,
@@ -125,217 +61,38 @@ fun AlbumDetailScreen(
     playingSongId: String? = null,
     modifier: Modifier = Modifier,
 ) {
-    CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onBackground) {
-        ArtworkTheme(artwork) {
-            BoxWithConstraints(modifier.fillMaxSize().background(Color.Black)) {
-                val listState = rememberLazyListState()
-                val fill = rememberViewportFill(listState)
-                val density = LocalDensity.current
-                val gradientHeight = maxHeight * GRADIENT_SCREENS
-                val gradientHeightPx = with(density) { gradientHeight.toPx() }
-                val screenHeightPx = with(density) { maxHeight.toPx() }
-                val statusBarTop = WindowInsets.statusBars.getTop(density)
-                val navBarBottom = WindowInsets.navigationBars.getBottom(density)
-                val statusBarDp = with(density) { statusBarTop.toDp() }
-                val barHeightPx = statusBarTop + with(density) { TopAppBarDefaults.TopAppBarExpandedHeight.toPx() }
-                val fadeDistancePx = with(density) { FADE_DISTANCE_DP.dp.toPx() }
-
-                var headerHeightPx by remember { mutableFloatStateOf(0f) }
-                var rowHeightPx by remember { mutableFloatStateOf(0f) }
-                var controlsTopPx by remember { mutableFloatStateOf(0f) }
-                val scrollPx by remember {
-                    derivedStateOf {
-                        val index = listState.firstVisibleItemIndex
-                        val before = if (index <= 0) 0f else headerHeightPx + rowHeightPx * (index - 1)
-                        (before + listState.firstVisibleItemScrollOffset).coerceAtLeast(0f)
-                    }
-                }
-                val barFraction by remember {
-                    derivedStateOf {
-                        if (controlsTopPx <= 0f || fadeDistancePx <= 0f) {
-                            0f
-                        } else {
-                            ((scrollPx - (controlsTopPx - barHeightPx)) / fadeDistancePx).coerceIn(0f, 1f)
-                        }
-                    }
-                }
-                val barColor by
-                    remember(artwork, barHeightPx, gradientHeightPx, screenHeightPx) {
-                        derivedStateOf {
-                            if (artwork == null || gradientHeightPx <= 0f) {
-                                Color.Black
-                            } else {
-                                val mid = scrollPx + barHeightPx / 2f
-                                lerp(
-                                    artwork.gradientColorAt(mid / gradientHeightPx),
-                                    artwork.darkPrimary,
-                                    heroDarkenAt(mid, screenHeightPx),
-                                )
-                            }
-                        }
-                    }
-
-                HeroGradient(
-                    colors = artwork,
-                    scrollPx = { scrollPx },
-                    modifier = Modifier.fillMaxSize(),
-                )
-
-                LazyColumn(
-                    state = listState,
-                    contentPadding =
-                        PaddingValues(
-                            bottom = 16.dp + with(density) { navBarBottom.toDp() },
-                        ),
-                    modifier = Modifier.fillMaxSize(),
-                ) {
-                    item {
-                        AlbumHeader(
-                            album = album,
-                            hasSongs = songs.isNotEmpty(),
-                            coverArt = coverArt,
-                            onPlay = { onSongClick(0) },
-                            onShuffle = onShuffle,
-                            onDownload = onDownload,
-                            onMore = onMore,
-                            topInset = statusBarDp,
-                            controlsModifier =
-                                Modifier.onGloballyPositioned {
-                                    controlsTopPx = it.positionInParent().y
-                                },
-                            modifier = Modifier.onSizeChanged { headerHeightPx = it.height.toFloat() },
-                        )
-                    }
-                    itemsIndexed(songs, key = { _, song -> song.id }) { index, song ->
-                        SongRow(
-                            song = song,
-                            isPlaying = song.id == playingSongId,
-                            modifier =
-                                Modifier
-                                    .onSizeChanged { rowHeightPx = it.height.toFloat() }
-                                    .clickable { onSongClick(index) },
-                        )
-                    }
-                    item { Spacer(Modifier.height(fill)) }
-                }
-
-                Box(
-                    Modifier
-                        .align(Alignment.TopStart)
-                        .fillMaxWidth()
-                        .height(statusBarDp + 8.dp)
-                        .background(
-                            Brush.verticalGradient(
-                                listOf(Color.Black.copy(alpha = 0.55f), Color.Transparent),
-                            ),
-                        ).graphicsLayer { alpha = 1f - barFraction },
-                )
-
-                TopAppBar(
-                    title = {
-                        Text(
-                            text = album?.name.orEmpty(),
-                            style = MaterialTheme.typography.headlineMedium,
-                            maxLines = 1,
-                            overflow = TextOverflow.Ellipsis,
-                            modifier = Modifier.graphicsLayer { alpha = barFraction },
-                        )
-                    },
-                    navigationIcon = {
-                        IconButton(onClick = onBack, modifier = Modifier.graphicsLayer { alpha = barFraction }) {
-                            Icon(Icons.AutoMirrored.Rounded.ArrowBack, contentDescription = "Back")
-                        }
-                    },
-                    colors = TopAppBarDefaults.topAppBarColors(containerColor = Color.Transparent),
-                    modifier =
-                        Modifier
-                            .align(Alignment.TopStart)
-                            .drawBehind { drawRect(barColor.copy(alpha = barFraction)) }
-                            .clickable(
-                                interactionSource = remember { MutableInteractionSource() },
-                                indication = null,
-                            ) {},
-                )
-            }
-        }
-    }
-}
-
-@Composable
-private fun AlbumHeader(
-    album: Album?,
-    hasSongs: Boolean,
-    coverArt: (String?, Boolean) -> CoverArtRef?,
-    onPlay: () -> Unit,
-    onShuffle: () -> Unit,
-    onDownload: () -> Unit,
-    onMore: () -> Unit,
-    topInset: Dp,
-    controlsModifier: Modifier = Modifier,
-    modifier: Modifier = Modifier,
-) {
-    Column(
-        modifier =
-            modifier
-                .fillMaxWidth()
-                .padding(start = 24.dp, end = 24.dp, top = topInset + 24.dp, bottom = 16.dp),
-        horizontalAlignment = Alignment.CenterHorizontally,
-    ) {
-        CoverArt(
-            ref = coverArt(album?.coverArt, false),
-            name = album?.name.orEmpty(),
-            thumbnailRef = coverArt(album?.coverArt, true),
-            modifier =
-                Modifier
-                    .fillMaxWidth(0.86f)
-                    .aspectRatio(1f)
-                    .shadow(elevation = 3.dp, shape = RoundedCornerShape(2.dp), clip = false)
-                    .clip(RoundedCornerShape(2.dp)),
-        )
-        Spacer(Modifier.height(20.dp))
-        Text(
-            text = album?.name.orEmpty(),
-            style = MaterialTheme.typography.headlineMedium,
-            textAlign = TextAlign.Center,
-            maxLines = 2,
-            overflow = TextOverflow.Ellipsis,
-        )
-        val subtitle =
-            listOfNotNull(
-                album?.albumArtist?.takeIf { it.isNotBlank() },
-                album?.year?.takeIf { it > 0 }?.toString(),
-            ).joinToString(" $DOT ")
-        if (subtitle.isNotEmpty()) {
-            Spacer(Modifier.height(4.dp))
-            Text(
-                text = subtitle,
-                style = MaterialTheme.typography.bodyMedium,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-                textAlign = TextAlign.Center,
-                maxLines = 1,
-                overflow = TextOverflow.Ellipsis,
+    HeroDetailScaffold(
+        artwork = artwork,
+        title = album?.name.orEmpty(),
+        onBack = onBack,
+        header = { controlsModifier, topInset ->
+            HeroHeader(
+                art = coverArt(album?.coverArt, false),
+                thumbnailRef = coverArt(album?.coverArt, true),
+                name = album?.name.orEmpty(),
+                subtitle =
+                    listOfNotNull(
+                        album?.albumArtist?.takeIf { it.isNotBlank() },
+                        album?.year?.takeIf { it > 0 }?.toString(),
+                    ).joinToString(" $DOT "),
+                hasSongs = songs.isNotEmpty(),
+                onPlay = { onSongClick(0) },
+                onShuffle = onShuffle,
+                onDownload = onDownload,
+                onMore = onMore,
+                topInset = topInset,
+                controlsModifier = controlsModifier,
             )
-        }
-        Spacer(Modifier.height(20.dp))
-        Row(
-            modifier = controlsModifier,
-            horizontalArrangement = Arrangement.spacedBy(16.dp),
-            verticalAlignment = Alignment.CenterVertically,
-        ) {
-            IconButton(onClick = onDownload) {
-                Icon(Icons.Rounded.Download, contentDescription = "Download")
+        },
+        content = { rowModifier ->
+            itemsIndexed(songs, key = { _, song -> song.id }) { index, song ->
+                SongRow(
+                    song = song,
+                    isPlaying = song.id == playingSongId,
+                    modifier = rowModifier.clickable { onSongClick(index) },
+                )
             }
-            Button(onClick = onPlay, enabled = hasSongs) {
-                Icon(Icons.Rounded.PlayArrow, contentDescription = null)
-                Spacer(Modifier.width(8.dp))
-                Text("Play")
-            }
-            FilledIconButton(onClick = onShuffle, enabled = hasSongs) {
-                Icon(Icons.Rounded.Shuffle, contentDescription = "Shuffle play")
-            }
-            IconButton(onClick = onMore) {
-                Icon(Icons.Rounded.MoreHoriz, contentDescription = "More options")
-            }
-        }
-    }
+        },
+        modifier = modifier,
+    )
 }

app/src/main/kotlin/com/subtracks/ui/library/PlaylistDetailScreen.kt

@@ -1,33 +1,9 @@
 package com.subtracks.ui.library
 
 import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.rememberLazyListState
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.rounded.ArrowBack
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
-import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.paging.compose.LazyPagingItems
 import androidx.paging.compose.collectAsLazyPagingItems
@@ -37,12 +13,17 @@ import com.subtracks.data.model.Playlist
 import com.subtracks.data.model.QueueKind
 import com.subtracks.data.model.SongListItem
 import com.subtracks.playback.PlaybackController
-import com.subtracks.ui.components.CoverArt
-import com.subtracks.ui.components.rememberViewportFill
+import com.subtracks.ui.components.HeroDetailScaffold
+import com.subtracks.ui.components.HeroHeader
+import com.subtracks.ui.theme.ArtworkColors
+import com.subtracks.ui.theme.rememberArtworkColors
 import org.koin.compose.koinInject
 import org.koin.compose.viewmodel.koinViewModel
 import org.koin.core.parameter.parametersOf
 
+private const val DOT = "\u00B7"
+private const val THEME_TRANSITION_MS = 100
+
 @Composable
 fun PlaylistDetailRoute(
     playlistId: String,
@@ -57,63 +38,44 @@ fun PlaylistDetailRoute(
         playlist = playlist,
         songs = viewModel.songs.collectAsLazyPagingItems(),
         coverArt = viewModel::coverArt,
+        artwork = rememberArtworkColors(viewModel.coverArt(playlist?.coverArt, true), THEME_TRANSITION_MS),
         onBack = onBack,
         onSongClick = viewModel::play,
         playingSongId = playback.item?.id.takeIf { context?.kind == QueueKind.Playlist && context.refId == playlistId },
     )
 }
 
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun PlaylistDetailScreen(
     playlist: Playlist?,
     songs: LazyPagingItems<SongListItem>,
     coverArt: (String?, Boolean) -> CoverArtRef?,
+    artwork: ArtworkColors?,
     onBack: () -> Unit,
     onSongClick: (Int) -> Unit,
     playingSongId: String? = null,
     modifier: Modifier = Modifier,
 ) {
-    val listState = rememberLazyListState()
-    val fill = rememberViewportFill(listState)
-    Scaffold(
-        modifier = modifier,
-        topBar = {
-            TopAppBar(
-                title = { Text(playlist?.name.orEmpty(), maxLines = 1) },
-                navigationIcon = {
-                    IconButton(onClick = onBack) {
-                        Icon(Icons.AutoMirrored.Rounded.ArrowBack, contentDescription = "Back")
-                    }
-                },
+    HeroDetailScaffold(
+        artwork = artwork,
+        title = playlist?.name.orEmpty(),
+        onBack = onBack,
+        header = { controlsModifier, topInset ->
+            HeroHeader(
+                art = coverArt(playlist?.coverArt, false),
+                thumbnailRef = coverArt(playlist?.coverArt, true),
+                name = playlist?.name.orEmpty(),
+                subtitle = playlistSubtitle(playlist),
+                hasSongs = songs.itemCount > 0,
+                onPlay = { onSongClick(0) },
+                onShuffle = {},
+                onDownload = {},
+                onMore = {},
+                topInset = topInset,
+                controlsModifier = controlsModifier,
             )
         },
-    ) { padding ->
-        LazyColumn(
-            state = listState,
-            modifier = Modifier.padding(padding).fillMaxSize(),
-        ) {
-            item {
-                Row(
-                    modifier = Modifier.fillMaxWidth().padding(16.dp),
-                    horizontalArrangement = Arrangement.spacedBy(16.dp),
-                    verticalAlignment = Alignment.CenterVertically,
-                ) {
-                    CoverArt(
-                        ref = coverArt(playlist?.coverArt, false),
-                        name = playlist?.name.orEmpty(),
-                        modifier = Modifier.size(120.dp).clip(RoundedCornerShape(2.dp)),
-                    )
-                    Column {
-                        Text(playlist?.name.orEmpty(), style = MaterialTheme.typography.titleLarge)
-                        Text(
-                            text = "${playlist?.songCount ?: 0} songs",
-                            style = MaterialTheme.typography.bodySmall,
-                            color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        )
-                    }
-                }
-            }
+        content = { rowModifier ->
             items(count = songs.itemCount, key = songs.itemKey { it.song.id }) { index ->
                 val item = songs[index]
                 if (item != null) {
@@ -122,11 +84,28 @@ fun PlaylistDetailScreen(
                         coverArtId = item.coverArt,
                         coverArt = coverArt,
                         isPlaying = item.song.id == playingSongId,
-                        modifier = Modifier.clickable { onSongClick(index) },
+                        modifier = rowModifier.clickable { onSongClick(index) },
                     )
                 }
             }
-            item { Spacer(Modifier.height(fill)) }
-        }
-    }
+        },
+        modifier = modifier,
+    )
+}
+
+private fun playlistSubtitle(playlist: Playlist?): String {
+    playlist ?: return ""
+    return listOfNotNull(
+        "${playlist.songCount} ${if (playlist.songCount == 1L) "song" else "songs"}",
+        formatDuration(playlist.duration),
+        playlist.comment?.takeIf { it.isNotBlank() },
+    ).joinToString(" $DOT ")
+}
+
+private fun formatDuration(seconds: Long): String? {
+    if (seconds <= 0) return null
+    val totalMinutes = seconds / 60
+    val hours = totalMinutes / 60
+    val minutes = totalMinutes % 60
+    return if (hours > 0) "$hours hr $minutes min" else "$totalMinutes min"
 }