feat(ui): elevated style reader toolbars (#894)

* feat(ui): toolbar animation

* feat(ui): elevated variant for reader toolbars

app/src/main/java/me/ash/reader/infrastructure/preference/ReadingPageTonalElevationPreference.kt

@@ -15,42 +15,30 @@ val LocalReadingPageTonalElevation =
     compositionLocalOf<ReadingPageTonalElevationPreference> { ReadingPageTonalElevationPreference.default }
 
 sealed class ReadingPageTonalElevationPreference(val value: Int) : Preference() {
-    object Level0 : ReadingPageTonalElevationPreference(ElevationTokens.Level0)
+    data object Outlined : ReadingPageTonalElevationPreference(ElevationTokens.Level0)
-    object Level1 : ReadingPageTonalElevationPreference(ElevationTokens.Level1)
+    data object Elevated : ReadingPageTonalElevationPreference(ElevationTokens.Level2)
-    object Level2 : ReadingPageTonalElevationPreference(ElevationTokens.Level2)
-    object Level3 : ReadingPageTonalElevationPreference(ElevationTokens.Level3)
-    object Level4 : ReadingPageTonalElevationPreference(ElevationTokens.Level4)
-    object Level5 : ReadingPageTonalElevationPreference(ElevationTokens.Level5)
 
     override fun put(context: Context, scope: CoroutineScope) {
         scope.launch {
-            context.dataStore.put(DataStoreKey.readingPageTonalElevation, value)
+            context.dataStore.put(readingPageTonalElevation, value)
         }
     }
 
     fun toDesc(context: Context): String =
         when (this) {
-            Level0 -> "Level 0 (${ElevationTokens.Level0}dp)"
+            Outlined -> "${ElevationTokens.Level0}dp"
-            Level1 -> "Level 1 (${ElevationTokens.Level1}dp)"
+            Elevated -> "${ElevationTokens.Level2}dp"
-            Level2 -> "Level 2 (${ElevationTokens.Level2}dp)"
-            Level3 -> "Level 3 (${ElevationTokens.Level3}dp)"
-            Level4 -> "Level 4 (${ElevationTokens.Level4}dp)"
-            Level5 -> "Level 5 (${ElevationTokens.Level5}dp)"
         }
 
     companion object {
 
-        val default = Level0
+        val default = Outlined
-        val values = listOf(Level0, Level1, Level2, Level3, Level4, Level5)
+        val values = listOf(Outlined, Elevated)
 
         fun fromPreferences(preferences: Preferences) =
             when (preferences[DataStoreKey.keys[readingPageTonalElevation]?.key as Preferences.Key<Int>]) {
-                ElevationTokens.Level0 -> Level0
+                ElevationTokens.Level0 -> Outlined
-                ElevationTokens.Level1 -> Level1
+                ElevationTokens.Level2 -> Elevated
-                ElevationTokens.Level2 -> Level2
-                ElevationTokens.Level3 -> Level3
-                ElevationTokens.Level4 -> Level4
-                ElevationTokens.Level5 -> Level5
                 else -> default
             }
     }

app/src/main/java/me/ash/reader/ui/page/home/reading/BottomBar.kt

@@ -2,10 +2,7 @@ package me.ash.reader.ui.page.home.reading
 
 import android.view.HapticFeedbackConstants
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.animation.core.VisibilityThreshold
 import androidx.compose.animation.expandVertically
-import androidx.compose.animation.fadeIn
-import androidx.compose.animation.fadeOut
 import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.layout.Arrangement
@@ -33,15 +30,14 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.zIndex
 import me.ash.reader.R
 import me.ash.reader.infrastructure.preference.LocalReadingPageTonalElevation
 import me.ash.reader.infrastructure.preference.LocalReadingRenderer
+import me.ash.reader.infrastructure.preference.ReadingPageTonalElevationPreference
 import me.ash.reader.infrastructure.preference.ReadingRendererPreference
 import me.ash.reader.ui.component.base.CanBeDisabledIconButton
-import me.ash.reader.ui.component.base.RYExtensibleVisibility
 import me.ash.reader.ui.component.webview.BionicReadingIcon
 
 @Composable
@@ -60,6 +56,7 @@ fun BottomBar(
     onReadAloud: () -> Unit = {},
 ) {
     val tonalElevation = LocalReadingPageTonalElevation.current
+    val isOutlined = tonalElevation == ReadingPageTonalElevationPreference.Outlined
     val renderer = LocalReadingRenderer.current
 
     Box(
@@ -70,16 +67,20 @@ fun BottomBar(
     ) {
         AnimatedVisibility(
             visible = isShow,
-            enter = expandVertically(),
+            enter = expandVertically(expandFrom = Alignment.Top),
-            exit = shrinkVertically()
+            exit = shrinkVertically(shrinkTowards = Alignment.Top)
         ) {
             val view = LocalView.current
             Column {
+                if (isOutlined) {
                     HorizontalDivider(
                         color = MaterialTheme.colorScheme.surfaceContainerHighest,
                         thickness = 0.5f.dp
                     )
-                Surface() {
+                }
+                Surface(
+                    color = MaterialTheme.colorScheme.run { if (isOutlined) surface else surfaceContainer }
+                ) {
                     // TODO: Component styles await refactoring
                     Row(
                         modifier = Modifier

app/src/main/java/me/ash/reader/ui/page/home/reading/ReadingPage.kt

@@ -5,9 +5,7 @@ import androidx.compose.animation.AnimatedContent
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.LocalOverscrollConfiguration
 import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.material.ExperimentalMaterialApi
@@ -16,9 +14,7 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
-import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -28,11 +24,9 @@ import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.hapticfeedback.HapticFeedbackType
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalHapticFeedback
-import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.unit.TextUnit
 import androidx.compose.ui.unit.isSpecified
 import androidx.compose.ui.unit.sp
@@ -40,7 +34,6 @@ import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.NavHostController
 import androidx.paging.compose.collectAsLazyPagingItems
-import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.launch
 import me.ash.reader.R
 import me.ash.reader.infrastructure.preference.LocalPullToSwitchArticle
@@ -123,7 +116,7 @@ fun ReadingPage(
                     TopBar(
                         navController = navController,
                         isShow = isShowToolBar,
-                        showDivider = showTopDivider,
+                        isScrolled = showTopDivider,
                         title = readerState.title,
                         link = readerState.link,
                         onClick = { bringToTop = true },
@@ -194,7 +187,7 @@ fun ReadingPage(
 
 
                             showTopDivider = snapshotFlow {
-                                scrollState.value != 0 || listState.firstVisibleItemIndex != 0
+                                scrollState.value >= 120 || listState.firstVisibleItemIndex != 0
                             }.collectAsStateValue(initial = false)
 
                             CompositionLocalProvider(

app/src/main/java/me/ash/reader/ui/page/home/reading/TopBar.kt

@@ -1,6 +1,9 @@
 package me.ash.reader.ui.page.home.reading
 
 import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.animateColorAsState
+import androidx.compose.animation.core.Spring
+import androidx.compose.animation.core.spring
 import androidx.compose.animation.expandVertically
 import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.clickable
@@ -15,7 +18,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.statusBars
-import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Palette
 import androidx.compose.material.icons.outlined.Share
@@ -27,20 +29,22 @@ import androidx.compose.material3.Surface
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.zIndex
 import androidx.navigation.NavHostController
 import me.ash.reader.R
 import me.ash.reader.infrastructure.preference.LocalReadingPageTonalElevation
 import me.ash.reader.infrastructure.preference.LocalSharedContent
+import me.ash.reader.infrastructure.preference.ReadingPageTonalElevationPreference
 import me.ash.reader.ui.component.base.FeedbackIconButton
-import me.ash.reader.ui.ext.surfaceColorAtElevation
 import me.ash.reader.ui.page.common.RouteName
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -48,7 +52,7 @@ import me.ash.reader.ui.page.common.RouteName
 fun TopBar(
     navController: NavHostController,
     isShow: Boolean,
-    showDivider: Boolean = false,
+    isScrolled: Boolean = false,
     title: String? = "",
     link: String? = "",
     onClick: (() -> Unit)? = null,
@@ -56,6 +60,13 @@ fun TopBar(
 ) {
     val context = LocalContext.current
     val sharedContent = LocalSharedContent.current
+    val isOutlined =
+        LocalReadingPageTonalElevation.current == ReadingPageTonalElevationPreference.Outlined
+
+    val containerColor by animateColorAsState(with(MaterialTheme.colorScheme) {
+        if (isOutlined || !isScrolled) surface else surfaceContainer
+    }, label = "", animationSpec = spring(stiffness = Spring.StiffnessMediumLow))
+
 
     Box(
         modifier = Modifier
@@ -63,29 +74,30 @@ fun TopBar(
             .zIndex(1f),
         contentAlignment = Alignment.TopCenter
     ) {
-        Column(modifier = if (onClick == null) Modifier else Modifier.clickable(
+        Column(
-            onClick = onClick,
+            modifier = Modifier.drawBehind { drawRect(containerColor) }
-            indication = null,
-            interactionSource = remember { MutableInteractionSource() }
-        )
         ) {
-            Surface(
+            Spacer(
                 modifier = Modifier
                     .fillMaxWidth()
                     .height(
                         WindowInsets.statusBars
                             .asPaddingValues()
                             .calculateTopPadding()
+                    ),
             )
-            ) {}
             AnimatedVisibility(
                 visible = isShow,
-                enter = expandVertically(expandFrom = Alignment.Top),
+                enter = expandVertically(expandFrom = Alignment.Bottom),
-                exit = shrinkVertically(shrinkTowards = Alignment.Top)
+                exit = shrinkVertically(shrinkTowards = Alignment.Bottom)
             ) {
                 TopAppBar(
                     title = {},
-                    modifier = Modifier,
+                    modifier = if (onClick == null) Modifier else Modifier.clickable(
+                        onClick = onClick,
+                        indication = null,
+                        interactionSource = remember { MutableInteractionSource() }
+                    ),
                     windowInsets = WindowInsets(0.dp),
                     navigationIcon = {
                         FeedbackIconButton(
@@ -95,7 +107,8 @@ fun TopBar(
                         ) {
                             onClose()
                         }
-                    }, actions = {
+                    },
+                    actions = {
                         FeedbackIconButton(
                             modifier = Modifier.size(22.dp),
                             imageVector = Icons.Outlined.Palette,
@@ -114,10 +127,11 @@ fun TopBar(
                         ) {
                             sharedContent.share(context, title, link)
                         }
-                    }, colors = TopAppBarDefaults.topAppBarColors()
+                    },
+                    colors = TopAppBarDefaults.topAppBarColors(containerColor = Color.Transparent)
                 )
             }
-            if (showDivider) {
+            if (isOutlined && isScrolled) {
                 HorizontalDivider(
                     color = MaterialTheme.colorScheme.surfaceContainerHighest,
                     thickness = 0.5f.dp

app/src/main/java/me/ash/reader/ui/page/settings/color/reading/ReadingStylePage.kt

@@ -204,14 +204,19 @@ fun ReadingStylePage(
                         onClick = { pullToSwitchArticle.toggle(context, scope) }) {
                         RYSwitch(activated = pullToSwitchArticle.value)
                     }
-/*                    SettingItem(
+                    Subtitle(
+                        modifier = Modifier.padding(horizontal = 24.dp),
+                        text = stringResource(R.string.toolbars)
+                    )
+                    SettingItem(
                         title = stringResource(R.string.tonal_elevation),
                         desc = "${tonalElevation.value}dp",
                         onClick = {
                             tonalElevationDialogVisible = true
                         },
                     ) {}
-                    Spacer(modifier = Modifier.height(24.dp))*/
+
+                    Spacer(modifier = Modifier.height(24.dp))
                 }
 
                 // Advanced
@@ -271,7 +276,7 @@ fun ReadingStylePage(
         }
     )
 
-/*    RadioDialog(
+    RadioDialog(
         visible = tonalElevationDialogVisible,
         title = stringResource(R.string.tonal_elevation),
         options = ReadingPageTonalElevationPreference.values.map {
@@ -284,7 +289,7 @@ fun ReadingStylePage(
         }
     ) {
         tonalElevationDialogVisible = false
-    }*/
+    }
 
     RadioDialog(
         visible = rendererDialogVisible,

app/src/main/res/values/strings.xml

@@ -460,4 +460,5 @@
     <string name="mark_as_read_on_scroll">Mark as read on scroll</string>
     <string name="become_a_sponsor">Become a sponsor</string>
     <string name="sponsor_desc">We build and upkeep this free, open-source app in our off-hours. If you enjoy it, please consider supporting us with a small donation! ☕️</string>
+    <string name="toolbars">Toolbars</string>
 </resources>